:root {
    --color-primary: #3157d5;
    --color-primary-hover: #2443a5;
    --color-primary-soft: rgba(49, 87, 213, 0.09);
    --color-secondary: #047d87;
    --color-secondary-hover: #036a72;
    --color-secondary-soft: rgba(4, 125, 135, 0.08);
    --color-success: #1f7a4d;
    --color-success-soft: rgba(31, 122, 77, 0.1);
    --color-warning: #a96d13;
    --color-warning-soft: rgba(169, 109, 19, 0.12);
    --color-danger: #c4553f;
    --color-danger-soft: rgba(196, 85, 63, 0.1);
    --color-info: #2f6fed;
    --color-info-soft: rgba(47, 111, 237, 0.12);
    --color-background: #f7f4ee;
    --color-surface: #fffdf8;
    --color-surface-strong: #ffffff;
    --color-border: #e7dfd2;
    --color-text: #172033;
    --color-text-muted: #667085;
    --font-family-base: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, Arial, sans-serif;
    --font-size-xs: 0.78rem;
    --font-size-sm: 0.86rem;
    --font-size-md: 0.94rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.08rem;
    --line-height-tight: 1.15;
    --line-height-base: 1.6;
    --line-height-loose: 1.7;
    --font-weight-regular: 400;
    --font-weight-medium: 700;
    --font-weight-bold: 800;
    --font-weight-strong: 900;
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-7: 32px;
    --space-8: 40px;
    --space-9: 48px;
    --radius-sm: 8px;
    --radius-md: 10px;
    --radius-lg: 12px;
    --radius-pill: 999px;
    --shadow-sm: 0 6px 18px rgba(30, 40, 58, 0.08);
    --shadow-md: 0 8px 24px rgba(30, 40, 58, 0.09);
    --shadow-lg: 0 18px 45px rgba(30, 40, 58, 0.12);
    --shadow-xl: 0 24px 64px rgba(30, 40, 58, 0.16);
    --focus-ring: 0 0 0 4px rgba(49, 87, 213, 0.16);
    --transition-fast: 160ms ease;
    --transition-base: 220ms cubic-bezier(0.2, 0.8, 0.2, 1);
    --transition-slow: 360ms cubic-bezier(0.2, 0.8, 0.2, 1);
    --bg: var(--color-background);
    --surface: var(--color-surface);
    --surface-strong: var(--color-surface-strong);
    --ink: var(--color-text);
    --muted: var(--color-text-muted);
    --line: var(--color-border);
    --primary: var(--color-primary);
    --primary-dark: var(--color-primary-hover);
    --teal: var(--color-secondary);
    --coral: var(--color-danger);
    --amber: var(--color-warning);
    --gold: #bd8a20;
    --green: var(--color-success);
    --shadow: var(--shadow-lg);
    --soft-shadow: var(--shadow-md);
    --card-radius: var(--radius-sm);
    --control-radius: var(--radius-sm);
    --ease-premium: cubic-bezier(0.2, 0.8, 0.2, 1);
    --lift-shadow: var(--shadow-xl);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font-family-base);
    color: var(--ink);
    background:
        linear-gradient(180deg, rgba(255, 253, 248, 0.92), rgba(247, 244, 238, 0.98)),
        radial-gradient(circle at top left, rgba(49, 87, 213, 0.12), transparent 34%),
        var(--bg);
    animation: pageFadeIn 0.45s ease both;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    opacity: 0.42;
    background-image:
        linear-gradient(rgba(23, 32, 51, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(23, 32, 51, 0.04) 1px, transparent 1px);
    background-size: 34px 34px;
}

.page-illustrations {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.bg-illustration {
    position: absolute;
    display: block;
    opacity: 0.075;
    filter: drop-shadow(0 18px 28px rgba(30, 40, 58, 0.08));
    transform-origin: center;
    animation: floatIllustration 8s ease-in-out infinite;
}

.bg-illustration-large {
    width: clamp(180px, 22vw, 310px);
}

.bg-illustration-medium {
    width: clamp(140px, 18vw, 240px);
}

.bg-illustration-small {
    width: clamp(100px, 12vw, 150px);
}

.bg-top-left {
    top: 72px;
    left: max(18px, calc((100vw - 1240px) / 2));
}

.bg-top-right {
    top: 110px;
    right: max(18px, calc((100vw - 1240px) / 2));
    animation-delay: -2.4s;
}

.bg-mid-left {
    top: 48%;
    left: max(10px, calc((100vw - 1280px) / 2));
    animation-delay: -4.2s;
}

.bg-bottom-right {
    right: max(14px, calc((100vw - 1280px) / 2));
    bottom: 44px;
    animation-delay: -6s;
}

.learn-page .bg-illustration,
.quiz-page .bg-illustration,
.result-page .bg-illustration {
    opacity: 0.065;
}

.quiz-page .bg-illustration {
    opacity: 0.07;
}

.result-page .bg-illustration {
    opacity: 0.075;
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1 {
    color: var(--ink);
    font-size: clamp(2.1rem, 4vw, 4.6rem);
    line-height: 1;
    letter-spacing: 0;
    margin-bottom: 16px;
}

h2 {
    color: var(--ink);
    font-size: clamp(1.45rem, 2.2vw, 2.1rem);
    letter-spacing: 0;
}

h3 {
    color: var(--muted);
    letter-spacing: 0;
}

p {
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.7;
}

a {
    color: inherit;
}

hr {
    border: 0;
    border-top: 1px solid var(--line);
    margin: 32px 0;
}

.container,
.learn-container {
    position: relative;
    z-index: 1;
    width: min(1120px, calc(100% - 32px));
    margin: 34px auto;
}

.exhibition-header {
    position: relative;
    z-index: 80;
    display: grid;
    grid-template-columns: 142px minmax(0, 1fr) 170px;
    align-items: center;
    gap: clamp(18px, 3vw, 34px);
    padding: clamp(18px, 3vw, 32px);
    border: 1px solid rgba(231, 223, 210, 0.9);
    border-radius: 8px;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.72), rgba(255, 253, 248, 0.92)),
        rgba(255, 253, 248, 0.9);
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px);
    animation: fadeInUp 0.55s ease both;
}

.exhibition-header:hover {
    box-shadow: 0 22px 54px rgba(30, 40, 58, 0.15);
}

.school-mark {
    display: grid;
    place-items: center;
    justify-self: start;
    width: clamp(104px, 10vw, 132px);
    aspect-ratio: 1;
    padding: 10px;
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.78);
    box-shadow: var(--soft-shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.school-mark:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 34px rgba(49, 87, 213, 0.16);
}

.school-logo {
    display: block;
    width: min(108px, 100%);
    height: min(108px, 100%);
    object-fit: contain;
}

.header-center {
    min-width: 0;
    text-align: center;
}

.school-name {
    margin-bottom: 5px;
    color: var(--primary);
    font-size: clamp(0.92rem, 1.5vw, 1.18rem);
    font-weight: 900;
    letter-spacing: 0.08em;
    line-height: 1.35;
}

.school-motto {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: fit-content;
    max-width: 100%;
    margin: 0 auto 12px;
    padding: 5px 11px;
    border: 1px solid rgba(189, 138, 32, 0.28);
    border-radius: 999px;
    color: var(--amber);
    background: rgba(189, 138, 32, 0.09);
    font-size: 0.86rem;
    font-weight: 800;
}

.header-center h1 {
    margin-bottom: 8px;
    font-size: clamp(2.35rem, 4.65vw, 4.65rem);
}

.subtitle {
    margin-bottom: 8px;
    color: #445064;
    font-size: clamp(1rem, 1.45vw, 1.2rem);
    font-weight: 700;
}

.hero-tagline {
    width: fit-content;
    max-width: 100%;
    margin: 0 auto 14px;
    padding: 7px 12px;
    border: 1px solid rgba(4, 125, 135, 0.16);
    border-radius: var(--radius-pill);
    color: var(--teal);
    background: rgba(4, 125, 135, 0.07);
    font-size: clamp(0.84rem, 1.2vw, 0.94rem);
    font-weight: 900;
    line-height: 1.25;
}

.exhibition-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: fit-content;
    max-width: 100%;
    min-height: 38px;
    margin: 0 auto;
    padding: 8px 15px;
    border: 1px solid rgba(189, 138, 32, 0.36);
    border-radius: 999px;
    color: #6b4607;
    background: linear-gradient(135deg, rgba(255, 240, 190, 0.95), rgba(255, 252, 240, 0.95));
    box-shadow: 0 12px 28px rgba(169, 109, 19, 0.18);
    font-size: clamp(0.88rem, 1.35vw, 1rem);
    font-weight: 900;
    letter-spacing: 0;
}

.header-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 10px;
    justify-content: flex-end;
    align-self: start;
}

.auth-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    min-width: 0;
}

.profile-menu {
    position: relative;
    z-index: 120;
}

.profile-menu-button,
.auth-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    justify-content: center;
    min-height: 48px;
    max-width: 260px;
    padding: 10px 14px;
    border: 1px solid rgba(49, 87, 213, 0.22);
    border-radius: var(--control-radius);
    color: var(--primary);
    background: rgba(255, 253, 248, 0.9);
    box-shadow: 0 12px 26px rgba(49, 87, 213, 0.15);
    font-size: 0.9rem;
    font-weight: 800;
    text-decoration: none;
    white-space: nowrap;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.profile-menu-button {
    cursor: pointer;
}

.profile-menu-icon {
    display: grid;
    place-items: center;
    width: 24px;
    height: 24px;
    border-radius: 999px;
    color: #ffffff;
    background: var(--primary);
    font-size: 0.82rem;
    flex: 0 0 auto;
}

.profile-menu-label {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
}

.profile-menu-arrow {
    color: var(--teal);
    font-size: 0.9rem;
    line-height: 1;
    transition: transform 0.2s ease;
}

.profile-menu.is-open .profile-menu-arrow {
    transform: rotate(180deg);
}

.profile-menu-button:hover,
.auth-link:hover {
    transform: translateY(-2px);
    background: rgba(49, 87, 213, 0.1);
    box-shadow: 0 16px 30px rgba(49, 87, 213, 0.22);
}

.profile-dropdown {
    position: absolute;
    z-index: 130;
    top: calc(100% + 10px);
    right: 0;
    display: grid;
    gap: 4px;
    width: min(285px, calc(100vw - 32px));
    max-height: min(520px, calc(100vh - 150px));
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 10px;
    border: 1px solid rgba(231, 223, 210, 0.96);
    border-radius: var(--radius-lg);
    background: rgba(255, 253, 248, 0.98);
    box-shadow: 0 24px 55px rgba(30, 40, 58, 0.18);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px) scale(0.98);
    transform-origin: top right;
    transition: opacity 0.18s ease, transform 0.18s ease;
}

.profile-dropdown::-webkit-scrollbar {
    width: 8px;
}

.profile-dropdown::-webkit-scrollbar-thumb {
    border-radius: 999px;
    background: rgba(49, 87, 213, 0.22);
}

.profile-menu.is-open .profile-dropdown {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0) scale(1);
}

.profile-dropdown a {
    display: grid;
    grid-template-columns: 28px minmax(0, 1fr);
    align-items: center;
    gap: 10px;
    min-height: 42px;
    padding: 9px 10px;
    border-radius: var(--control-radius);
    color: var(--ink);
    font-size: 0.95rem;
    font-weight: 800;
    text-decoration: none;
    transition: color 0.18s ease, background 0.18s ease, transform 0.18s ease;
}

.profile-dropdown a:hover,
.profile-dropdown a:focus-visible {
    color: var(--primary);
    background: rgba(49, 87, 213, 0.08);
    transform: translateX(2px);
    outline: none;
}

.profile-dropdown-logout {
    margin-top: 4px;
    border-top: 1px solid var(--line);
}

.secondary-auth-link {
    color: var(--primary);
    background: rgba(49, 87, 213, 0.08);
    box-shadow: none;
}

.secondary-auth-link:hover {
    color: #ffffff;
}

.mode-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 16px;
    padding: 14px 18px;
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: 8px;
    background: rgba(49, 87, 213, 0.06);
    box-shadow: var(--soft-shadow);
}

.mode-banner div {
    display: grid;
    gap: 4px;
}

.mode-banner strong {
    color: var(--ink);
}

.mode-banner span {
    color: var(--muted);
    font-weight: 700;
}

.account-mode-banner {
    border-color: rgba(31, 122, 77, 0.22);
    background: rgba(31, 122, 77, 0.08);
}

.mode-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: fit-content;
    min-height: 34px;
    padding: 7px 11px;
    border-radius: 999px;
    font-size: 0.84rem;
    font-weight: 900;
    white-space: nowrap;
}

.guest-badge {
    border: 1px solid rgba(49, 87, 213, 0.22);
    color: var(--primary);
    background: rgba(49, 87, 213, 0.09);
}

.verified-badge {
    border: 1px solid rgba(31, 122, 77, 0.24);
    color: var(--green);
    background: rgba(31, 122, 77, 0.1);
}

.role-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: fit-content;
    min-height: 30px;
    padding: 6px 12px;
    border: 1px solid rgba(107, 114, 128, 0.22);
    border-radius: 999px;
    color: #4b5563;
    background: rgba(107, 114, 128, 0.08);
    font-size: 0.82rem;
    font-weight: 900;
    white-space: nowrap;
}

.role-developer,
span.role-developer {
    border-color: rgba(49, 87, 213, 0.28);
    color: #2446b8;
    background: rgba(49, 87, 213, 0.12);
}

.role-technical-support,
span.role-technical-support {
    border-color: rgba(126, 63, 196, 0.3);
    color: #7134b7;
    background: rgba(126, 63, 196, 0.12);
}

.role-qa-tester,
span.role-qa-tester {
    border-color: rgba(31, 122, 77, 0.28);
    color: #167245;
    background: rgba(31, 122, 77, 0.12);
}

.role-student,
span.role-student {
    border-color: rgba(107, 114, 128, 0.26);
    color: #4b5563;
    background: rgba(107, 114, 128, 0.1);
}

.profile-dropdown-user {
    display: grid;
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 10px;
    align-items: center;
    padding: 10px;
    border-bottom: 1px solid var(--line);
}

.profile-dropdown-user > span,
.student-identity-card > span {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 999px;
    color: #ffffff;
    background: var(--green);
}

.profile-dropdown-user > div,
.student-identity-card > div {
    min-width: 0;
}

.profile-dropdown-user strong,
.student-identity-card strong {
    display: block;
    color: var(--ink);
}

.profile-dropdown-user .role-badge,
.student-identity-card .role-badge {
    max-width: 100%;
    white-space: normal;
    text-align: left;
}

.profile-dropdown-user small,
.student-identity-card small {
    color: var(--green);
    font-weight: 900;
}

.project-team-card {
    margin-top: 22px;
    padding: clamp(20px, 3vw, 30px);
    border: 1px solid rgba(231, 223, 210, 0.92);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.93);
    box-shadow: var(--soft-shadow);
    animation: fadeInUp 0.62s ease both;
    animation-delay: 0.06s;
}

.section-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 22px;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--line);
    padding-bottom: 18px;
}

.section-heading > div {
    display: grid;
    gap: 9px;
}

.section-heading .eyebrow {
    margin-bottom: 0;
}

.section-heading h2 {
    margin: 0;
    text-align: right;
    line-height: 1.15;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    overflow: hidden;
    border: 1px solid rgba(231, 223, 210, 0.7);
    border-radius: var(--card-radius);
    background: var(--line);
}

.team-member {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 13px;
    min-width: 0;
    padding: 17px;
    border-right: 0;
    background: rgba(255, 253, 248, 0.94);
    transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.team-member:hover {
    transform: translateY(-2px);
    background: rgba(49, 87, 213, 0.045);
    box-shadow: 0 12px 24px rgba(30, 40, 58, 0.08);
}

.team-icon {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 8px;
    color: #ffffff;
    background: var(--primary);
    font-size: 1.12rem;
}

.team-member:nth-child(2) .team-icon {
    background: var(--teal);
}

.team-member:nth-child(3) .team-icon {
    background: var(--coral);
}

.team-member:nth-child(4) .team-icon {
    background: var(--amber);
}

.team-member h3 {
    margin-bottom: 4px;
    color: var(--muted);
    font-size: 0.84rem;
    font-weight: 900;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.team-member p {
    margin-bottom: 0;
    font-size: 0.94rem;
    line-height: 1.55;
}

.member-name {
    color: var(--ink);
    font-size: 1.12rem;
    font-weight: 900;
    line-height: 1.25;
}

.class-card {
    grid-column: 1 / -1;
    margin-top: 0;
    border-top: 0;
    border-right: 0;
}

.welcome-card,
.about-card {
    margin-top: 22px;
    padding: clamp(20px, 3vw, 30px);
    border: 1px solid rgba(231, 223, 210, 0.92);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.94);
    box-shadow: var(--soft-shadow);
    animation: fadeInUp 0.62s ease both;
}

.welcome-card {
    position: relative;
    overflow: hidden;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
    animation-delay: 0.04s;
}

.welcome-card::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        linear-gradient(120deg, rgba(49, 87, 213, 0.08), transparent 38%),
        radial-gradient(circle at 92% 18%, rgba(4, 125, 135, 0.1), transparent 28%);
}

.welcome-card > * {
    position: relative;
    z-index: 1;
}

.welcome-card-copy {
    display: grid;
    gap: 7px;
}

.welcome-card h2,
.about-card h2 {
    margin-bottom: 8px;
}

.welcome-card-copy h2,
.welcome-card-copy p {
    margin-bottom: 0;
}

.welcome-subtitle {
    color: var(--primary);
    font-size: clamp(1.02rem, 1.45vw, 1.18rem);
    font-weight: 900;
}

.welcome-card p,
.about-card p {
    max-width: 860px;
    margin-bottom: 0;
    color: #445064;
    font-size: clamp(0.96rem, 1.25vw, 1.04rem);
    line-height: 1.65;
}

.hero-feature-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.hero-feature-badges span {
    display: inline-flex;
    align-items: center;
    min-height: 36px;
    padding: 8px 12px;
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: var(--radius-pill);
    color: var(--ink);
    background: rgba(255, 255, 255, 0.7);
    box-shadow: 0 8px 18px rgba(30, 40, 58, 0.06);
    font-size: 0.88rem;
    font-weight: 900;
    line-height: 1.2;
}

.about-card {
    display: grid;
    grid-template-columns: minmax(0, 0.85fr) minmax(300px, 1.15fr);
    gap: 24px;
    align-items: start;
}

.about-intro {
    display: grid;
    gap: 10px;
}

.about-intro h2 {
    margin-bottom: 0;
}

.project-overview-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.overview-panel {
    min-width: 0;
    padding: 16px;
    border: 1px solid rgba(49, 87, 213, 0.13);
    border-radius: var(--card-radius);
    background: rgba(255, 255, 255, 0.68);
}

.overview-panel-wide {
    grid-column: 1 / -1;
}

.overview-panel h3 {
    margin-bottom: 8px;
    color: var(--ink);
    font-size: 0.96rem;
    font-weight: 900;
}

.overview-panel p {
    font-size: 0.93rem;
}

.account-motivation-card,
.guest-locked-card {
    margin-top: 22px;
    padding: clamp(22px, 3.4vw, 34px);
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.95);
    box-shadow: var(--soft-shadow);
}

.account-motivation-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.account-motivation-card ul {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 18px;
    margin: 14px 0 0;
    padding: 0;
    list-style: none;
    color: var(--ink);
    font-weight: 800;
}

.locked-feature-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.locked-feature-grid button,
.locked-dashboard-card {
    display: grid;
    gap: 8px;
    align-content: center;
    min-height: 132px;
    padding: 18px;
    border: 1px solid rgba(102, 112, 133, 0.2);
    border-radius: 8px;
    color: var(--ink);
    background: rgba(102, 112, 133, 0.08);
    box-shadow: none;
    text-align: left;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.locked-feature-grid button:hover {
    transform: translateY(-3px);
    border-color: rgba(49, 87, 213, 0.22);
    box-shadow: var(--soft-shadow);
}

.locked-feature-grid span,
.locked-dashboard-card span {
    font-size: 1.45rem;
}

.locked-feature-grid small,
.locked-dashboard-card p {
    margin: 0;
    color: var(--muted);
    font-weight: 700;
}

.locked-dashboard-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.locked-dashboard-card {
    opacity: 0.72;
    filter: grayscale(0.85);
}

.locked-modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: grid;
    place-items: center;
    padding: 18px;
    background: rgba(16, 20, 31, 0.48);
    backdrop-filter: blur(6px);
}

.locked-modal-backdrop[hidden] {
    display: none;
}

.locked-modal {
    position: relative;
    width: min(460px, 100%);
    padding: 28px;
    border: 1px solid rgba(231, 223, 210, 0.96);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.98);
    box-shadow: 0 30px 70px rgba(16, 20, 31, 0.24);
    text-align: center;
}

.locked-modal-close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 38px;
    min-height: 38px;
    padding: 0;
    border-radius: 999px;
    box-shadow: none;
}

.locked-modal-icon {
    display: grid;
    place-items: center;
    width: 58px;
    height: 58px;
    margin: 0 auto 16px;
    border-radius: 999px;
    color: #ffffff;
    background: var(--primary);
    font-size: 1.6rem;
}

.locked-modal p {
    margin-bottom: 20px;
}

.locked-modal-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

body.modal-open {
    overflow: hidden;
}

.tech-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tech-badges span {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    padding: 6px 10px;
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: 999px;
    color: var(--primary);
    background: rgba(49, 87, 213, 0.07);
    font-size: 0.82rem;
    font-weight: 800;
}

.learn-container {
    padding: clamp(22px, 4vw, 48px);
    border: 1px solid rgba(231, 223, 210, 0.9);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.92);
    box-shadow: var(--shadow);
}

.hero {
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
    gap: 36px;
    align-items: center;
    padding: clamp(24px, 4vw, 44px);
    min-height: min(430px, calc(100vh - 150px));
    border: 1px solid rgba(231, 223, 210, 0.95);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.94);
    box-shadow: var(--shadow);
    animation: fadeInUp 0.55s ease both;
}

.hero-copy {
    max-width: 540px;
}

.eyebrow,
.badge {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    margin-bottom: 18px;
    padding: 8px 12px;
    border: 1px solid rgba(4, 125, 135, 0.22);
    border-radius: 999px;
    color: var(--teal);
    background: rgba(4, 125, 135, 0.08);
    font-size: 0.86rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.hero-copy p {
    max-width: 46rem;
    color: #445064;
    font-size: clamp(1.05rem, 1.5vw, 1.28rem);
}

.hero-image {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 10;
    height: auto;
    object-fit: cover;
    object-position: center;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #ffffff;
    box-shadow: var(--soft-shadow);
}

.feature-showcase-section {
    margin: 24px 0;
    animation: fadeInUp 0.62s ease both;
}

.feature-showcase-heading {
    align-items: flex-start;
    margin-bottom: 20px;
    padding-bottom: 18px;
}

.feature-showcase-heading h2 {
    text-align: left;
}

.feature-showcase-heading p {
    max-width: 430px;
    margin: 0;
    color: var(--muted);
    font-weight: 700;
    line-height: 1.6;
}

.features {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin: 20px 0;
    animation: fadeInUp 0.65s ease both;
    animation-delay: 0.08s;
}

.feature-showcase-section .features {
    margin: 0;
}

.feature-card,
.score-card,
.achievement-card,
.recommendation-card,
.card,
.quiz-box,
.tip-box,
.diagram-card {
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.9);
    box-shadow: var(--soft-shadow);
}

.feature-card {
    position: relative;
    overflow: hidden;
    display: grid;
    align-content: start;
    gap: 10px;
    padding: 18px;
    min-height: 0;
    animation: fadeInUp 0.55s ease both;
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.feature-card::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: 0;
    background:
        linear-gradient(135deg, rgba(49, 87, 213, 0.08), transparent 42%),
        radial-gradient(circle at 88% 16%, rgba(4, 125, 135, 0.1), transparent 28%);
    transition: opacity 0.22s ease;
}

.feature-card > * {
    position: relative;
    z-index: 1;
}

.feature-card:hover {
    transform: translateY(-3px);
    border-color: rgba(49, 87, 213, 0.18);
    background: rgba(255, 253, 248, 0.98);
    box-shadow: 0 14px 30px rgba(30, 40, 58, 0.12);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-card:hover .feature-icon {
    transform: translateY(-1px) scale(1.03);
    box-shadow: 0 10px 22px rgba(49, 87, 213, 0.16);
}

.feature-card:nth-child(2) {
    animation-delay: 0.08s;
}

.feature-card:nth-child(3) {
    animation-delay: 0.16s;
}

.feature-card:nth-child(4) {
    animation-delay: 0.2s;
}

.feature-card:nth-child(5) {
    animation-delay: 0.24s;
}

.feature-card:nth-child(6) {
    animation-delay: 0.28s;
}

.feature-icon {
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    color: white;
    background: var(--primary);
    font-size: 1.12rem;
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.feature-card:nth-child(2) .feature-icon {
    background: var(--teal);
}

.feature-card:nth-child(3) .feature-icon {
    background: var(--coral);
}

.feature-card:nth-child(4) .feature-icon {
    background: var(--green);
}

.feature-card:nth-child(5) .feature-icon {
    background: var(--amber);
}

.feature-card:nth-child(6) .feature-icon {
    background: var(--teal);
}

.feature-card h3,
.score-card h3,
.card h3,
.recommendation-card h3 {
    color: var(--ink);
    margin-bottom: 8px;
}

.feature-card h3 {
    margin-bottom: 0;
    font-size: 1.06rem;
    line-height: 1.25;
}

.feature-card p {
    margin-bottom: 0;
    font-size: 0.92rem;
    line-height: 1.55;
}

.feature-list {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin: 2px 0 0;
    padding: 0;
    list-style: none;
}

.feature-list li {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    padding: 5px 9px;
    border: 1px solid rgba(49, 87, 213, 0.13);
    border-radius: var(--radius-pill);
    color: var(--primary);
    background: rgba(49, 87, 213, 0.07);
    font-size: 0.76rem;
    font-weight: 900;
    line-height: 1.2;
}

.platform-highlights-card,
.why-study-card {
    position: relative;
    overflow: hidden;
    margin-top: 22px;
    animation: fadeInUp 0.62s ease both;
}

.platform-highlights-card {
    padding: clamp(20px, 3vw, 30px);
    border: 1px solid rgba(31, 122, 77, 0.14);
    border-radius: var(--card-radius);
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.62), rgba(255, 253, 248, 0.95)),
        rgba(255, 253, 248, 0.94);
    box-shadow: var(--soft-shadow);
}

.platform-highlights-card::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        linear-gradient(90deg, rgba(31, 122, 77, 0.08), transparent 34%),
        linear-gradient(135deg, transparent 58%, rgba(49, 87, 213, 0.07));
}

.platform-highlights-card > * {
    position: relative;
    z-index: 1;
}

.platform-highlights-card .section-heading,
.why-study-card .section-heading {
    align-items: flex-start;
    margin-bottom: 18px;
    padding: 0;
    border-bottom: 0;
}

.platform-highlights-card .section-heading h2,
.why-study-card .section-heading h2 {
    text-align: left;
}

.platform-highlights-card .section-heading p {
    max-width: 430px;
    margin: 0;
    color: var(--muted);
    font-weight: 700;
    line-height: 1.6;
}

.highlight-chip-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.highlight-chip-grid span {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 7px 11px;
    border: 1px solid rgba(31, 122, 77, 0.16);
    border-radius: var(--radius-pill);
    color: var(--ink);
    background: rgba(255, 253, 248, 0.88);
    box-shadow: 0 5px 14px rgba(30, 40, 58, 0.05);
    font-size: 0.84rem;
    font-weight: 900;
    line-height: 1.2;
    transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.highlight-chip-grid span::before {
    content: "\2713";
    display: inline-grid;
    place-items: center;
    width: 16px;
    height: 16px;
    margin-right: 7px;
    border-radius: 999px;
    color: #ffffff;
    background: var(--green);
    font-size: 0.68rem;
    line-height: 1;
}

.highlight-chip-grid span:hover {
    transform: translateY(-1px);
    border-color: rgba(31, 122, 77, 0.24);
    background: rgba(31, 122, 77, 0.08);
    box-shadow: 0 10px 22px rgba(30, 40, 58, 0.08);
}

.highlight-chip-grid span:nth-child(4n + 2)::before {
    background: var(--primary);
}

.highlight-chip-grid span:nth-child(4n + 3)::before {
    background: var(--teal);
}

.highlight-chip-grid span:nth-child(4n + 4)::before {
    background: var(--amber);
}

.why-study-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 12px;
}

.why-study-grid article {
    display: grid;
    align-content: start;
    gap: 9px;
    min-height: 166px;
    padding: 16px;
    border: 1px solid rgba(49, 87, 213, 0.14);
    border-radius: var(--card-radius);
    background: rgba(255, 253, 248, 0.9);
    box-shadow: var(--soft-shadow);
    transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease, background 0.22s ease;
}

.why-study-grid article:hover {
    transform: translateY(-3px);
    border-color: rgba(49, 87, 213, 0.24);
    background: rgba(255, 253, 248, 0.98);
    box-shadow: 0 14px 30px rgba(30, 40, 58, 0.12);
}

.why-study-grid span {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-lg);
    color: #ffffff;
    background: var(--primary);
    font-size: 1rem;
}

.why-study-grid article:nth-child(2) span {
    background: var(--teal);
}

.why-study-grid article:nth-child(3) span {
    background: var(--amber);
}

.why-study-grid article:nth-child(4) span {
    background: var(--green);
}

.why-study-grid article:nth-child(5) span {
    background: var(--coral);
}

.why-study-grid h3 {
    margin-bottom: 0;
    color: var(--ink);
    font-size: 0.96rem;
}

.why-study-grid p {
    margin-bottom: 0;
    font-size: 0.9rem;
    line-height: 1.55;
}

.lesson-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin: 0 0 14px;
    padding: 12px 16px;
    border: 1px solid rgba(4, 125, 135, 0.2);
    border-radius: 8px;
    color: var(--ink);
    background: rgba(4, 125, 135, 0.08);
    box-shadow: var(--soft-shadow);
    animation: fadeInUp 0.65s ease both;
    animation-delay: 0.15s;
}

.preview-icon {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    flex: 0 0 auto;
    border-radius: 8px;
    color: #ffffff;
    background: var(--teal);
    font-weight: 800;
}

.study-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding: clamp(20px, 3vw, 30px);
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: 8px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.74), rgba(255, 253, 248, 0.96)),
        rgba(255, 253, 248, 0.96);
    box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.72) inset,
        0 18px 40px rgba(30, 40, 58, 0.1);
    animation: fadeInUp 0.7s ease both;
    animation-delay: 0.22s;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(280px, 1fr));
    gap: 14px 18px;
    align-items: start;
}

.form-field {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 7px;
    min-width: 0;
}

.form-field label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--ink);
    font-size: 0.9rem;
    font-weight: 800;
}

.name-field {
    grid-column: 1;
}

.subject-field {
    grid-column: 1;
}

.class-field {
    grid-column: 2;
}

.textbook-field {
    grid-column: 2;
}

.chapter-field {
    grid-column: 1 / -1;
    margin-top: 2px;
    padding-top: 14px;
    border-top: 1px solid rgba(49, 87, 213, 0.12);
}

.subject-hints {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    min-height: 26px;
}

.subject-hints span {
    display: inline-flex;
    align-items: center;
    min-height: 24px;
    padding: 4px 7px;
    border: 1px solid rgba(49, 87, 213, 0.14);
    border-radius: 999px;
    color: var(--muted);
    background: rgba(49, 87, 213, 0.06);
    font-size: 0.74rem;
    font-weight: 700;
}

input,
select,
textarea {
    width: 100%;
    min-height: 48px;
    padding: 12px 14px;
    border: 1px solid #d8cfbf;
    border-radius: 8px;
    color: var(--ink);
    background: #ffffff;
    font: inherit;
    outline: none;
    transition: border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, transform 0.18s ease;
}

textarea {
    min-height: 132px;
    resize: vertical;
    line-height: 1.6;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--primary);
    box-shadow:
        0 0 0 4px rgba(49, 87, 213, 0.14),
        0 10px 24px rgba(49, 87, 213, 0.1);
    transform: translateY(-1px);
}

.autocomplete-menu {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    z-index: 35;
    display: grid;
    gap: 6px;
    max-height: min(420px, 58vh);
    overflow-y: auto;
    padding: 8px;
    border: 1px solid rgba(49, 87, 213, 0.18);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow:
        0 20px 46px rgba(30, 40, 58, 0.18),
        0 1px 0 rgba(255, 255, 255, 0.8) inset;
    backdrop-filter: blur(14px);
}

.autocomplete-menu[hidden] {
    display: none;
}

.autocomplete-option {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 10px;
    justify-content: stretch;
    min-height: 68px;
    width: 100%;
    padding: 10px 12px;
    border: 1px solid transparent;
    border-radius: 6px;
    color: var(--ink);
    background: transparent;
    box-shadow: none;
    font-size: 0.92rem;
    font-weight: 700;
    text-align: left;
    line-height: 1.25;
    white-space: normal;
    transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, color 0.18s ease;
}

.autocomplete-option-icon {
    display: inline-grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    background: rgba(49, 87, 213, 0.08);
    font-size: 1.15rem;
}

.autocomplete-option-content {
    display: grid;
    gap: 3px;
    min-width: 0;
}

.autocomplete-option-content strong,
.popular-chapter-button span:nth-child(2) {
    min-width: 0;
    overflow-wrap: anywhere;
}

.autocomplete-option-content small {
    color: var(--muted);
    font-size: 0.76rem;
    font-weight: 800;
}

.autocomplete-option mark,
.popular-chapter-button mark {
    padding: 0 1px;
    border-radius: 4px;
    color: var(--primary);
    background: rgba(49, 87, 213, 0.14);
    font-weight: 900;
}

.autocomplete-chapter-count {
    justify-self: end;
    padding: 5px 8px;
    border-radius: 999px;
    color: var(--primary);
    background: rgba(49, 87, 213, 0.08);
    font-size: 0.72rem;
    font-weight: 900;
    white-space: nowrap;
}

.autocomplete-ai-badge {
    grid-column: 2 / -1;
    justify-self: start;
    padding: 4px 7px;
    border-radius: 999px;
    color: #7c3aed;
    background: rgba(124, 58, 237, 0.1);
    font-size: 0.68rem;
    font-weight: 800;
}

.autocomplete-option:hover,
.autocomplete-option[aria-selected="true"] {
    color: var(--primary);
    background: rgba(49, 87, 213, 0.07);
    border-color: rgba(49, 87, 213, 0.22);
    box-shadow: 0 10px 22px rgba(49, 87, 213, 0.12);
    transform: translateY(-1px);
}

.autocomplete-option.is-unavailable {
    opacity: 0.78;
}

.autocomplete-section-label {
    padding: 4px 6px 2px;
    color: var(--muted);
    font-size: 0.7rem;
    font-weight: 900;
    letter-spacing: 0;
    text-transform: uppercase;
}

.autocomplete-inline-empty,
.autocomplete-empty-state {
    display: grid;
    gap: 4px;
    padding: 12px;
    border: 1px solid rgba(49, 87, 213, 0.12);
    border-radius: 8px;
    color: var(--ink);
    background: rgba(49, 87, 213, 0.05);
}

.autocomplete-inline-empty {
    grid-template-columns: auto 1fr;
    align-items: center;
}

.autocomplete-empty-state {
    place-items: center;
    min-height: 128px;
    text-align: center;
}

.autocomplete-empty-icon {
    display: inline-grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border-radius: 999px;
    background: rgba(49, 87, 213, 0.08);
    font-size: 1.35rem;
}

.autocomplete-empty-state small {
    max-width: 34ch;
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 700;
}

.autocomplete-skeleton,
.chapter-card-skeleton {
    display: grid;
    gap: 7px;
    min-height: 68px;
    padding: 12px;
    border: 1px solid rgba(49, 87, 213, 0.1);
    border-radius: 8px;
    background: rgba(49, 87, 213, 0.04);
    overflow: hidden;
}

.autocomplete-skeleton span,
.chapter-card-skeleton span {
    height: 10px;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(49, 87, 213, 0.08), rgba(49, 87, 213, 0.2), rgba(49, 87, 213, 0.08));
    background-size: 220% 100%;
    animation: searchSkeleton 1.15s ease-in-out infinite;
}

.autocomplete-skeleton span:first-child,
.chapter-card-skeleton span:first-child {
    width: 42%;
}

.autocomplete-skeleton span:nth-child(2),
.chapter-card-skeleton span:nth-child(2) {
    width: 68%;
}

.autocomplete-skeleton span:nth-child(3) {
    width: 30%;
}

input.is-selecting {
    border-color: var(--primary);
    box-shadow:
        0 0 0 4px rgba(49, 87, 213, 0.14),
        0 0 24px rgba(49, 87, 213, 0.2);
    transform: translateY(-1px);
}

.autocomplete-status {
    min-height: 18px;
    margin: 0;
    color: #b54708;
    font-size: 0.82rem;
    font-weight: 700;
}

.selection-info-card,
.popular-chapters-panel {
    padding: 12px;
    border: 1px solid rgba(49, 87, 213, 0.14);
    border-radius: 8px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.88), rgba(245, 248, 255, 0.94)),
        rgba(49, 87, 213, 0.05);
    box-shadow: 0 12px 28px rgba(30, 40, 58, 0.08);
}

.textbook-info-card {
    align-self: stretch;
    padding: 12px;
}

.selection-info-card[hidden],
.popular-chapters-panel[hidden] {
    display: none;
}

.selection-card-title {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    color: var(--ink);
    font-size: 0.96rem;
    line-height: 1.3;
}

.selection-card-title strong {
    min-width: 0;
    overflow-wrap: anywhere;
}

.selection-info-card dl {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin: 0;
}

.textbook-info-card .selection-metadata-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 8px;
}

.selection-info-card dl div {
    min-width: 0;
}

.textbook-info-card .selection-metadata-grid div {
    display: grid;
    gap: 3px;
    padding: 8px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.72);
}

.selection-info-card dt,
.popular-chapters-heading small {
    color: var(--muted);
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
}

.selection-info-card dt {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.selection-info-card dd {
    margin: 0;
    color: var(--ink);
    font-size: 0.86rem;
    font-weight: 800;
    line-height: 1.35;
    overflow-wrap: anywhere;
}

.selection-status-ready {
    color: #16834a !important;
}

.selection-status-badge {
    display: inline-flex;
    align-items: center;
    margin-left: auto;
    min-height: 24px;
    width: fit-content;
    padding: 3px 8px;
    border: 1px solid rgba(31, 122, 77, 0.2);
    border-radius: 999px;
    background: rgba(31, 122, 77, 0.09);
    font-size: 0.76rem;
    font-weight: 900;
    line-height: 1;
}

.popular-chapters-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 8px;
    color: var(--ink);
    font-size: 0.86rem;
    font-weight: 900;
}

.popular-chapters-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    grid-auto-rows: minmax(62px, 1fr);
    gap: 8px;
    align-items: stretch;
}

.popular-chapter-button {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 8px;
    width: 100%;
    min-width: 0;
    min-height: 62px;
    height: 100%;
    padding: 11px 12px;
    border: 1px solid rgba(49, 87, 213, 0.14);
    border-radius: 8px;
    color: var(--ink);
    background: rgba(255, 255, 255, 0.72);
    box-shadow: none;
    font-size: 0.84rem;
    font-weight: 800;
    line-height: 1.25;
    text-align: left;
    white-space: normal;
    overflow-wrap: anywhere;
    transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, color 0.18s ease;
}

.popular-chapter-button span:last-child {
    min-width: 0;
    overflow-wrap: anywhere;
}

.popular-chapter-button:hover,
.popular-chapter-button:focus-visible {
    color: var(--primary);
    background: rgba(49, 87, 213, 0.08);
    border-color: rgba(49, 87, 213, 0.28);
    box-shadow: 0 10px 20px rgba(49, 87, 213, 0.1);
    transform: translateY(-2px);
}

.popular-chapter-button.is-selected {
    color: #ffffff;
    border-color: rgba(49, 87, 213, 0.6);
    background: linear-gradient(135deg, var(--primary), #5477f6 58%, #18a999);
    box-shadow:
        0 14px 28px rgba(49, 87, 213, 0.24),
        0 0 26px rgba(49, 87, 213, 0.22);
}

.popular-chapter-button.is-selected mark {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.18);
}

.popular-chapter-check {
    margin-left: auto;
    color: inherit;
    font-size: 0.9rem;
}

.selection-loading {
    margin: 0;
    color: var(--muted);
    font-size: 0.84rem;
    font-weight: 700;
}

.start-learning-btn:disabled {
    cursor: not-allowed;
    opacity: 0.62;
    transform: none;
    filter: saturate(0.72);
    box-shadow: none;
}

.start-learning-btn.is-enabled {
    animation: startButtonGlow 0.7s ease both;
}

@media (max-width: 560px) {
    .selection-info-card dl {
        grid-template-columns: 1fr;
    }

    .textbook-info-card .selection-metadata-grid,
    .popular-chapters-list {
        grid-template-columns: 1fr;
    }

    .autocomplete-option {
        grid-template-columns: auto minmax(0, 1fr);
    }

    .autocomplete-chapter-count,
    .autocomplete-ai-badge {
        grid-column: 2;
        justify-self: start;
    }

    .popular-chapter-button {
        width: 100%;
    }
}

@keyframes searchSkeleton {
    0% {
        background-position: 120% 0;
    }

    100% {
        background-position: -120% 0;
    }
}

@keyframes startButtonGlow {
    0% {
        box-shadow: 0 0 0 rgba(49, 87, 213, 0);
    }

    100% {
        box-shadow:
            0 14px 28px rgba(49, 87, 213, 0.27),
            0 0 28px rgba(49, 87, 213, 0.24);
    }
}

button,
.button-link,
.back-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 12px 18px;
    border: 0;
    border-radius: 8px;
    color: #ffffff;
    background: var(--primary);
    font: inherit;
    font-weight: 800;
    text-decoration: none;
    cursor: pointer;
    box-shadow: 0 12px 24px rgba(49, 87, 213, 0.24);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

button:active,
.button-link:active,
.back-btn:active {
    transform: translateY(0) scale(0.98);
    box-shadow:
        0 0 0 5px rgba(49, 87, 213, 0.18),
        0 0 28px rgba(49, 87, 213, 0.62),
        0 10px 24px rgba(49, 87, 213, 0.32);
}

button:focus-visible,
.button-link:focus-visible,
.back-btn:focus-visible {
    outline: none;
    box-shadow:
        0 0 0 5px rgba(49, 87, 213, 0.2),
        0 0 26px rgba(49, 87, 213, 0.55),
        0 12px 24px rgba(49, 87, 213, 0.24);
}

button:hover,
.button-link:hover,
.back-btn:hover {
    transform: translateY(-2px);
    background: var(--primary-dark);
    box-shadow: 0 16px 30px rgba(49, 87, 213, 0.28);
}

.study-form > button {
    min-width: min(100%, 250px);
    min-height: 54px;
    align-self: center;
    padding-inline: 32px;
    font-size: 1.02rem;
}

.start-learning-btn {
    background: linear-gradient(135deg, var(--primary), #4d76f5 54%, var(--teal));
    box-shadow:
        0 14px 28px rgba(49, 87, 213, 0.27),
        0 0 24px rgba(49, 87, 213, 0.2);
}

.start-learning-btn:hover {
    transform: translateY(-2px) scale(1.015);
    background: linear-gradient(135deg, var(--primary-dark), #5e84ff 54%, var(--teal));
    box-shadow:
        0 18px 34px rgba(49, 87, 213, 0.34),
        0 0 34px rgba(49, 87, 213, 0.28);
}

.home-actions {
    display: flex;
    justify-content: center;
    margin-top: 16px;
}

.flash-messages {
    display: grid;
    gap: 10px;
    margin: 16px 0;
}

.flash-message {
    position: relative;
    overflow: hidden;
    padding: 12px 14px;
    border: 1px solid rgba(49, 87, 213, 0.18);
    border-radius: 8px;
    color: var(--ink);
    background: rgba(49, 87, 213, 0.08);
    font-weight: 700;
}

.flash-error {
    border-color: rgba(196, 85, 63, 0.28);
    background: rgba(196, 85, 63, 0.1);
}

.flash-success {
    border-color: rgba(31, 122, 77, 0.28);
    background: rgba(31, 122, 77, 0.1);
}

.flash-success.success-motion {
    animation: successSettle 0.48s var(--ease-premium) both;
}

.flash-success.success-motion::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(120deg, transparent, rgba(31, 122, 77, 0.16), transparent);
    transform: translateX(-100%);
    animation: successSweep 1.1s var(--ease-premium) 0.12s both;
}

.auth-container {
    max-width: 760px;
}

.auth-header-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 22px;
}

.auth-header-row h1 {
    margin-bottom: 0;
}

.auth-page-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
}

.auth-page-actions .auth-nav {
    position: relative;
}

.auth-form {
    margin-top: 0;
}

.auth-switch {
    margin: 18px 0 0;
    text-align: center;
}

.auth-switch a {
    color: var(--primary);
    font-weight: 800;
}

.forgot-password-link {
    display: inline-flex;
    align-self: center;
    justify-content: center;
    margin-top: 4px;
    color: var(--primary);
    font-weight: 900;
}

.forgot-password-link:hover {
    color: var(--primary-dark);
}

.auth-helper-text {
    margin: 0;
    color: var(--muted);
    font-size: 0.94rem;
    line-height: 1.6;
}

.password-reset-summary {
    display: grid;
    gap: 6px;
    margin-bottom: 18px;
    padding: 18px;
    border: 1px solid rgba(31, 122, 77, 0.22);
    border-radius: 8px;
    background: rgba(31, 122, 77, 0.08);
    box-shadow: var(--soft-shadow);
}

.password-reset-summary span {
    color: var(--green);
    font-size: 0.8rem;
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.password-reset-summary strong {
    color: var(--ink);
    font-size: 1.18rem;
}

.password-reset-summary p {
    margin: 0;
    color: var(--muted);
}

.profile-card {
    padding: clamp(18px, 3vw, 26px);
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.95);
    box-shadow: var(--soft-shadow);
}

.profile-gamification-card {
    display: grid;
    gap: 16px;
    margin-top: 18px;
    padding: clamp(18px, 3vw, 26px);
    border: 1px solid rgba(49, 87, 213, 0.18);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.95);
    box-shadow: var(--soft-shadow);
}

.profile-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 18px;
}

.profile-card-header h2 {
    margin-bottom: 4px;
}

.profile-card-header p {
    margin-bottom: 0;
}

.edit-profile-button {
    border: 1px solid rgba(49, 87, 213, 0.22);
    box-shadow: none;
}

.profile-details {
    display: grid;
    gap: 12px;
    margin: 0;
}

.profile-details div {
    display: grid;
    grid-template-columns: 140px minmax(0, 1fr);
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
}

.profile-details div:last-child {
    border-bottom: 0;
}

.profile-details dt {
    color: var(--muted);
    font-weight: 800;
}

.profile-details dd {
    margin: 0;
    color: var(--ink);
    font-weight: 700;
    overflow-wrap: anywhere;
}

.profile-future-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin-top: 18px;
}

.profile-future-card {
    min-height: 150px;
    padding: 18px;
    border: 1px dashed rgba(49, 87, 213, 0.28);
    border-radius: 8px;
    background: rgba(49, 87, 213, 0.05);
}

.profile-future-card.completed {
    border-style: solid;
    border-color: rgba(31, 122, 77, 0.24);
    background: rgba(31, 122, 77, 0.08);
}

.profile-gamification-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.profile-gamification-grid article {
    min-width: 0;
    padding: 14px;
    border: 1px solid rgba(49, 87, 213, 0.13);
    border-radius: 8px;
    background: rgba(49, 87, 213, 0.06);
}

.profile-gamification-grid span {
    display: block;
    margin-bottom: 6px;
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.profile-gamification-grid strong {
    color: var(--ink);
    font-size: 1.45rem;
}

.profile-future-card h3 {
    margin-bottom: 8px;
    color: var(--ink);
    font-size: 1rem;
}

.profile-future-card p {
    margin-bottom: 0;
    font-size: 0.94rem;
}

.settings-main {
    display: grid;
    gap: 18px;
}

.settings-topbar h1 {
    font-size: clamp(2.1rem, 4vw, 3.6rem);
}

.settings-layout {
    display: grid;
    grid-template-columns: minmax(190px, 240px) minmax(0, 1fr);
    gap: 18px;
    align-items: start;
}

.settings-section-nav {
    position: sticky;
    top: 24px;
    display: grid;
    gap: 8px;
    padding: 14px;
    border: 1px solid rgba(231, 223, 210, 0.92);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.95);
    box-shadow: var(--soft-shadow);
}

.settings-section-nav a {
    display: block;
    padding: 10px 12px;
    border-radius: 8px;
    color: var(--muted);
    font-weight: 900;
    text-decoration: none;
}

.settings-section-nav a:hover,
.settings-section-nav a:focus-visible {
    color: var(--primary);
    background: rgba(49, 87, 213, 0.09);
}

.settings-sections {
    display: grid;
    gap: 18px;
    min-width: 0;
}

.settings-section {
    scroll-margin-top: 18px;
}

.settings-form {
    display: grid;
    gap: 18px;
}

.settings-form button {
    justify-self: start;
}

.settings-fieldset {
    min-width: 0;
    margin: 0;
    padding: 0;
    border: 0;
}

.settings-fieldset legend {
    margin-bottom: 10px;
    color: var(--ink);
    font-weight: 900;
}

.segmented-options {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.segmented-options label {
    cursor: pointer;
}

.segmented-options input {
    position: absolute;
    inline-size: 1px;
    block-size: 1px;
    opacity: 0;
}

.segmented-options span {
    display: inline-flex;
    align-items: center;
    min-height: 42px;
    padding: 9px 14px;
    border: 1px solid rgba(49, 87, 213, 0.18);
    border-radius: 8px;
    color: var(--muted);
    background: rgba(49, 87, 213, 0.06);
    font-weight: 900;
}

.segmented-options input:checked + span {
    color: #ffffff;
    border-color: var(--primary);
    background: var(--primary);
    box-shadow: 0 10px 22px rgba(49, 87, 213, 0.2);
}

.segmented-options input:focus-visible + span {
    box-shadow: 0 0 0 4px rgba(49, 87, 213, 0.18);
}

.settings-switch-list {
    display: grid;
    gap: 12px;
}

.settings-switch {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    min-height: 58px;
    padding: 12px 14px;
    border: 1px solid rgba(49, 87, 213, 0.14);
    border-radius: 8px;
    background: rgba(49, 87, 213, 0.05);
    color: var(--ink);
    font-weight: 900;
}

.settings-switch input {
    width: 22px;
    min-height: 22px;
    accent-color: var(--primary);
}

.account-actions-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 18px;
    align-items: start;
}

.account-actions-grid h3 {
    margin-bottom: 8px;
}

.account-actions-grid p {
    color: var(--muted);
    font-weight: 700;
}

.delete-account-form {
    padding: 16px;
    border: 1px solid rgba(196, 85, 63, 0.24);
    border-radius: 8px;
    background: rgba(196, 85, 63, 0.06);
}

.dashboard-page {
    min-height: 100vh;
}

.dashboard-shell {
    display: grid;
    grid-template-columns: 270px minmax(0, 1fr);
    gap: 22px;
    width: min(1440px, calc(100% - 32px));
    margin: 24px auto 34px;
}

.dashboard-menu-toggle {
    display: none;
}

.student-sidebar {
    position: sticky;
    top: 24px;
    align-self: start;
    min-height: calc(100vh - 48px);
    padding: 18px;
    border: 1px solid rgba(231, 223, 210, 0.92);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.95);
    box-shadow: var(--soft-shadow);
    z-index: 45;
}

.sidebar-brand {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 12px;
    align-items: center;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--line);
}

.sidebar-brand-icon {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border-radius: 8px;
    color: #ffffff;
    background: var(--primary);
    font-size: 1.25rem;
}

.sidebar-brand strong,
.sidebar-brand span {
    display: block;
}

.sidebar-brand strong {
    color: var(--ink);
    font-size: 1rem;
}

.sidebar-brand span {
    color: var(--muted);
    font-size: 0.84rem;
    font-weight: 700;
}

.sidebar-nav {
    display: grid;
    gap: 7px;
    margin-top: 16px;
}

.sidebar-nav a {
    display: grid;
    grid-template-columns: 28px minmax(0, 1fr);
    align-items: center;
    gap: 10px;
    min-height: 44px;
    padding: 10px 12px;
    border-radius: 8px;
    color: var(--muted);
    font-weight: 800;
    text-decoration: none;
    transition: transform 0.18s ease, background 0.18s ease, color 0.18s ease;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    color: var(--primary);
    background: rgba(49, 87, 213, 0.09);
    transform: translateX(2px);
}

.sidebar-nav small {
    color: var(--muted);
    font-size: 0.72rem;
}

.dashboard-sidebar-overlay {
    display: none;
}

.dashboard-main {
    min-width: 0;
}

.dashboard-topbar,
.dashboard-panel,
.dashboard-stat-card,
.activity-card,
.achievement-badge,
.recommended-topic-card {
    border: 1px solid rgba(231, 223, 210, 0.92);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.95);
    box-shadow: var(--soft-shadow);
}

.dashboard-topbar {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    padding: clamp(20px, 3vw, 30px);
    margin-bottom: 18px;
}

.dashboard-topbar h1 {
    margin-bottom: 8px;
    font-size: clamp(2rem, 3.6vw, 3.25rem);
}

.dashboard-topbar p {
    margin-bottom: 0;
    font-size: 1.08rem;
}

.student-identity-card {
    display: inline-grid;
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 10px;
    align-items: center;
    margin-top: 14px;
    padding: 10px 12px;
    border: 1px solid rgba(31, 122, 77, 0.18);
    border-radius: 8px;
    background: rgba(31, 122, 77, 0.08);
}

.dashboard-topbar-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 10px;
}

.dashboard-stat-grid {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 14px;
    margin-bottom: 18px;
}

.dashboard-stat-card {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 12px;
    align-items: center;
    min-height: 118px;
    padding: 18px;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.dashboard-stat-card:hover,
.quick-actions-grid a:hover,
.activity-card:hover,
.achievement-badge:hover,
.recommended-topic-card:hover,
.locked-dashboard-card:hover {
    transform: translateY(-3px);
    border-color: rgba(49, 87, 213, 0.2);
    box-shadow: 0 18px 38px rgba(30, 40, 58, 0.13);
}

.dashboard-stat-card > span {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border-radius: 8px;
    color: #ffffff;
    background: var(--primary);
    font-size: 1.2rem;
}

.dashboard-stat-card:nth-child(2) > span {
    background: var(--teal);
}

.dashboard-stat-card:nth-child(3) > span {
    background: var(--amber);
}

.dashboard-stat-card:nth-child(4) > span {
    background: var(--green);
}

.dashboard-stat-card:nth-child(5) > span {
    background: var(--coral);
}

.dashboard-stat-card:nth-child(6) > span {
    background: var(--gold);
}

.dashboard-stat-card:nth-child(7) > span {
    background: var(--primary);
}

.dashboard-stat-card:nth-child(8) > span {
    background: var(--teal);
}

.dashboard-stat-card p {
    margin-bottom: 6px;
    font-size: 0.86rem;
    font-weight: 800;
}

.dashboard-stat-card strong {
    color: var(--ink);
    font-size: clamp(1.45rem, 2vw, 2rem);
}

.rbac-stat-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.rbac-status-list,
.rbac-tool-grid,
.rbac-table-grid,
.rbac-check-list {
    display: grid;
    gap: 14px;
}

.rbac-tool-grid,
.rbac-table-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.rbac-status-list div,
.rbac-table-grid article,
.rbac-tool-card {
    min-width: 0;
    padding: 16px;
    border: 1px solid rgba(49, 87, 213, 0.12);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.82);
}

.rbac-status-list span,
.rbac-table-grid span,
.rbac-tool-card small {
    display: block;
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.rbac-status-list strong,
.rbac-table-grid strong,
.rbac-tool-card strong {
    display: block;
    margin-top: 6px;
    color: var(--ink);
    font-size: 1.08rem;
}

.rbac-tool-card > span {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    margin-bottom: 12px;
    border-radius: 8px;
    color: #fff;
    background: var(--primary);
    font-size: 1.2rem;
}

.rbac-tool-card p {
    margin: 10px 0 12px;
    color: var(--muted);
}

.rbac-check-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.rbac-check-list li {
    padding: 13px 14px;
    border: 1px solid rgba(31, 122, 77, 0.16);
    border-radius: 8px;
    color: var(--ink);
    background: rgba(31, 122, 77, 0.08);
    font-weight: 800;
}

.system-health-section {
    margin-bottom: 18px;
}

.health-card-grid,
.support-category-grid,
.feature-status-grid,
.info-metric-grid,
.service-status-list,
.faq-list,
.support-feedback-form {
    display: grid;
    gap: 14px;
}

.health-card-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

.support-category-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.feature-status-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.info-metric-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.health-status-card,
.support-category-card,
.feature-status-grid article,
.info-metric-grid article,
.service-status-row,
.faq-list details {
    position: relative;
    min-width: 0;
    overflow: hidden;
    padding: 16px;
    border: 1px solid rgba(49, 87, 213, 0.13);
    border-radius: 8px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.74), rgba(255, 253, 248, 0.92)),
        rgba(255, 253, 248, 0.86);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.7) inset, var(--soft-shadow);
    transition:
        transform var(--transition-base),
        border-color var(--transition-base),
        box-shadow var(--transition-base),
        background var(--transition-base);
}

.health-status-card:hover,
.support-category-card:hover,
.feature-status-grid article:hover,
.info-metric-grid article:hover,
.service-status-row:hover,
.faq-list details:hover {
    transform: translateY(-3px);
    border-color: rgba(49, 87, 213, 0.26);
    box-shadow: var(--lift-shadow);
}

.health-card-topline,
.health-card-meta,
.service-status-row,
.feature-status-grid article {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.health-card-topline {
    justify-content: flex-start;
    margin-bottom: 14px;
}

.health-card-topline strong,
.support-category-card strong,
.feature-status-grid strong,
.service-status-row strong,
.info-metric-grid strong {
    color: var(--ink);
}

.health-card-meta {
    align-items: flex-end;
}

.health-card-meta span,
.service-status-row strong {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    padding: 5px 9px;
    border-radius: 999px;
    color: var(--color-success);
    background: var(--color-success-soft);
    font-size: 0.78rem;
    font-weight: 900;
    white-space: nowrap;
}

.health-card-meta small,
.service-status-row span,
.info-metric-grid span {
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.status-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    flex: 0 0 10px;
    border-radius: 50%;
    background: var(--color-success);
    box-shadow: 0 0 0 6px var(--color-success-soft);
}

.status-offline .status-dot,
.status-unavailable .status-dot {
    background: var(--color-danger);
    box-shadow: 0 0 0 6px var(--color-danger-soft);
}

.status-warning .status-dot {
    background: var(--color-warning);
    box-shadow: 0 0 0 6px var(--color-warning-soft);
}

.status-offline .health-card-meta span,
.status-unavailable .health-card-meta span,
.status-unavailable.service-status-row strong {
    color: var(--color-danger);
    background: var(--color-danger-soft);
}

.status-warning.service-status-row strong {
    color: var(--color-warning);
    background: var(--color-warning-soft);
}

.service-status-row {
    min-height: 58px;
}

.info-metric-grid article {
    display: grid;
    align-content: start;
    gap: 7px;
    min-height: 92px;
}

.compact-metrics article {
    min-height: 78px;
}

.feature-status-grid article {
    justify-content: flex-start;
    min-height: 60px;
}

.feature-status-grid article > span,
.support-category-card > span,
.help-center-pulse span {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    flex: 0 0 42px;
    border-radius: 8px;
    color: #ffffff;
    background: var(--primary);
    font-size: 1.15rem;
}

.feature-status-grid article > span {
    color: var(--color-success);
    background: var(--color-success-soft);
}

.support-category-card {
    min-height: 172px;
}

.support-category-card > span {
    margin-bottom: 12px;
}

.support-category-card:nth-child(2n) > span {
    background: var(--teal);
}

.support-category-card:nth-child(3n) > span {
    background: var(--amber);
}

.support-category-card:nth-child(4n) > span {
    background: var(--green);
}

.support-category-card p {
    margin: 9px 0 0;
    font-size: 0.94rem;
}

.help-center-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 18px;
    margin-bottom: 18px;
}

.help-center-hero h2,
.help-center-hero p {
    margin-bottom: 0;
}

.help-center-pulse {
    display: grid;
    gap: 9px;
    justify-items: center;
    min-width: 132px;
    padding: 16px;
    border: 1px solid rgba(4, 125, 135, 0.16);
    border-radius: 8px;
    color: var(--ink);
    background: rgba(4, 125, 135, 0.08);
    animation: supportPulse 2.8s ease-in-out infinite;
}

.help-center-pulse strong {
    font-size: 0.86rem;
}

.faq-list details {
    padding: 0;
}

.faq-list summary {
    cursor: pointer;
    padding: 16px;
    color: var(--ink);
    font-weight: 900;
}

.faq-list summary::marker {
    color: var(--primary);
}

.faq-list p {
    margin: 0;
    padding: 0 16px 16px;
    font-size: 0.94rem;
}

.support-form-layout {
    align-items: start;
}

.support-feedback-form label {
    display: grid;
    gap: 8px;
}

.support-feedback-form label > span {
    color: var(--ink);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-bold);
}

.support-feedback-form button {
    justify-self: start;
    min-width: 170px;
}

.panel-skeleton-stack {
    display: none;
}

.system-panel-loading .panel-skeleton-stack {
    position: absolute;
    inset: 14px;
    z-index: 2;
    display: grid;
    gap: 10px;
    align-content: center;
    background: inherit;
}

.system-panel-loading .panel-skeleton-stack span {
    height: 14px;
    border-radius: 999px;
    background:
        linear-gradient(90deg, rgba(49, 87, 213, 0.08), rgba(255, 255, 255, 0.72), rgba(49, 87, 213, 0.08));
    background-size: 220% 100%;
    animation: skeletonShimmer 1.15s var(--ease-premium) infinite;
}

.system-panel-loading .panel-skeleton-stack span:last-child {
    width: 68%;
}

@keyframes supportPulse {
    0%,
    100% {
        transform: translateY(0);
        box-shadow: var(--soft-shadow);
    }
    50% {
        transform: translateY(-2px);
        box-shadow: 0 16px 34px rgba(4, 125, 135, 0.16);
    }
}

.developer-filter-form {
    display: grid;
    grid-template-columns: minmax(220px, 1.4fr) repeat(3, minmax(150px, 1fr)) auto auto;
    gap: 12px;
    align-items: end;
}

.developer-results-summary,
.developer-pagination {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.developer-results-summary {
    margin-bottom: 14px;
    color: var(--muted);
    font-weight: 900;
}

.developer-table-wrap {
    margin-bottom: 16px;
}

.developer-users-table {
    min-width: 1420px;
}

.developer-users-table a {
    color: var(--primary);
    font-weight: 900;
    text-decoration: none;
}

.developer-users-table a:hover {
    text-decoration: underline;
}

.developer-pagination {
    justify-content: flex-end;
}

.button-link.disabled {
    opacity: 0.55;
    pointer-events: none;
}

.developer-detail-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.developer-detail-grid article {
    min-width: 0;
    padding: 16px;
    border: 1px solid rgba(49, 87, 213, 0.12);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.82);
}

.developer-detail-grid span {
    display: block;
    margin-bottom: 6px;
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.developer-detail-grid strong {
    display: block;
    color: var(--ink);
    font-size: 1rem;
    overflow-wrap: anywhere;
}

.access-denied-card {
    display: grid;
    gap: 12px;
}

.access-denied-card > span {
    display: grid;
    place-items: center;
    width: 54px;
    height: 54px;
    border-radius: 8px;
    color: #fff;
    background: var(--coral);
    font-size: 1.6rem;
}

.dashboard-panel {
    padding: clamp(18px, 2.5vw, 26px);
    margin-bottom: 18px;
}

.dashboard-hero-grid,
.dashboard-insight-grid {
    display: grid;
    gap: 18px;
    margin-bottom: 18px;
}

.dashboard-hero-grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
}

.dashboard-insight-grid {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 0.95fr) minmax(260px, 0.8fr);
}

.dashboard-quote-card,
.dashboard-progress-card,
.continue-dashboard-panel,
.weekly-summary-panel,
.recommendation-focus-card,
.tutor-preview-panel {
    position: relative;
    overflow: hidden;
}

.dashboard-quote-card {
    display: grid;
    align-content: center;
    min-height: 228px;
    color: #ffffff;
    background:
        linear-gradient(135deg, rgba(49, 87, 213, 0.96), rgba(4, 125, 135, 0.92) 58%, rgba(31, 122, 77, 0.9)),
        var(--primary);
}

.dashboard-quote-card::before,
.continue-dashboard-panel::before,
.recommendation-focus-card::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        linear-gradient(120deg, rgba(255, 255, 255, 0.2), transparent 42%),
        radial-gradient(circle at 88% 8%, rgba(255, 255, 255, 0.18), transparent 24%);
}

.dashboard-quote-card > *,
.continue-dashboard-panel > *,
.recommendation-focus-card > * {
    position: relative;
    z-index: 1;
}

.dashboard-quote-card .eyebrow,
.dashboard-quote-card p,
.dashboard-quote-card cite {
    color: #ffffff;
}

.dashboard-quote-card blockquote {
    margin: 12px 0 0;
}

.dashboard-quote-card blockquote p {
    margin-bottom: 16px;
    font-size: clamp(1.25rem, 2.1vw, 1.85rem);
    font-weight: 900;
    line-height: 1.28;
}

.dashboard-quote-card cite {
    font-style: normal;
    font-weight: 800;
    opacity: 0.86;
}

.compact-heading {
    align-items: center;
}

.compact-heading strong,
.weekly-summary-panel > .dashboard-section-heading > strong {
    color: var(--primary);
    font-size: clamp(1.7rem, 3vw, 2.45rem);
    line-height: 1;
}

.learning-progress-track,
.weekly-summary-track,
.xp-progress-track,
.challenge-progress-track {
    height: 13px;
    overflow: hidden;
    border-radius: 999px;
    background: rgba(49, 87, 213, 0.11);
    box-shadow: inset 0 1px 3px rgba(30, 40, 58, 0.12);
}

.learning-progress-track span,
.weekly-summary-track span,
.xp-progress-track span,
.challenge-progress-track span {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--primary), var(--teal), var(--green));
    animation: progressGrow 0.78s var(--ease-premium) both;
}

.gamification-panel,
.daily-challenge-panel {
    display: grid;
    gap: 16px;
}

.gamification-level-card {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 18px;
}

.gamification-level-card h2 {
    margin-bottom: 8px;
}

.gamification-level-card p {
    margin-bottom: 0;
    font-weight: 800;
}

.gamification-level-card > strong {
    color: var(--primary);
    font-size: clamp(2rem, 4vw, 3.2rem);
    line-height: 1;
}

.xp-award-grid,
.daily-challenge-grid,
.achievement-progress-grid {
    display: grid;
    gap: 12px;
}

.xp-award-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
}

.xp-award-grid span {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    min-width: 0;
    min-height: 44px;
    padding: 10px 12px;
    border: 1px solid rgba(49, 87, 213, 0.13);
    border-radius: 8px;
    color: var(--muted);
    background: rgba(49, 87, 213, 0.06);
    font-size: 0.86rem;
    font-weight: 900;
}

.xp-award-grid strong {
    color: var(--primary);
}

.daily-challenge-grid,
.achievement-progress-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.achievement-progress-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.daily-challenge-card,
.achievement-progress-card {
    display: grid;
    gap: 12px;
    min-width: 0;
    min-height: 142px;
    padding: 16px;
    border: 1px solid rgba(49, 87, 213, 0.14);
    border-radius: 8px;
    background: rgba(49, 87, 213, 0.055);
}

.daily-challenge-card.completed,
.achievement-progress-card.completed {
    border-color: rgba(31, 122, 77, 0.24);
    background: rgba(31, 122, 77, 0.08);
}

.daily-challenge-card strong,
.achievement-progress-card strong {
    display: block;
    margin-bottom: 6px;
    color: var(--ink);
}

.daily-challenge-card span,
.achievement-progress-card span {
    color: var(--muted);
    font-weight: 800;
}

.daily-challenge-card small,
.achievement-progress-card small {
    color: var(--primary);
    font-weight: 900;
}

.challenge-progress-track {
    height: 9px;
}

.dashboard-progress-card p,
.weekly-summary-panel p,
.recommendation-focus-card p {
    margin: 14px 0 0;
    font-weight: 800;
}

.continue-dashboard-panel {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    min-height: 150px;
    background:
        linear-gradient(135deg, rgba(189, 138, 32, 0.12), rgba(49, 87, 213, 0.08), rgba(4, 125, 135, 0.09)),
        rgba(255, 253, 248, 0.96);
}

.continue-dashboard-copy {
    min-width: 0;
}

.continue-dashboard-copy h2,
.recommendation-focus-card h2 {
    margin-bottom: 8px;
}

.continue-dashboard-copy p {
    margin-bottom: 0;
    color: #445064;
    font-weight: 800;
    overflow-wrap: anywhere;
}

.continue-learning-button {
    flex: 0 0 auto;
    min-height: 52px;
    padding-inline: 20px;
    font-size: 1rem;
}

.tutor-preview-panel {
    min-height: 100%;
}

.tutor-preview-card {
    display: grid;
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 14px;
    align-items: start;
}

.tutor-preview-card > span {
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    border-radius: var(--radius-lg);
    color: #ffffff;
    background: var(--teal);
    box-shadow: var(--soft-shadow);
    font-size: 1.35rem;
}

.tutor-preview-card strong,
.tutor-preview-card small {
    display: block;
}

.tutor-preview-card strong {
    color: var(--ink);
    overflow-wrap: anywhere;
}

.tutor-preview-card p {
    margin: 8px 0 6px;
    font-weight: 800;
    line-height: 1.55;
}

.tutor-preview-card small {
    color: var(--muted);
    font-weight: 900;
}

.tutor-preview-card .button-link {
    grid-column: 2;
    width: fit-content;
    margin-top: 2px;
}

.weekly-summary-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin-top: 16px;
}

.weekly-summary-grid span {
    display: grid;
    gap: 3px;
    min-width: 0;
    padding: 12px;
    border: 1px solid rgba(49, 87, 213, 0.13);
    border-radius: var(--radius-lg);
    color: var(--muted);
    background: rgba(49, 87, 213, 0.06);
    font-size: 0.86rem;
    font-weight: 900;
    text-align: center;
}

.weekly-summary-grid strong {
    color: var(--ink);
    font-size: 1.35rem;
}

.recommendation-focus-card {
    display: grid;
    align-content: center;
    background:
        linear-gradient(145deg, rgba(31, 122, 77, 0.1), rgba(189, 138, 32, 0.08)),
        rgba(255, 253, 248, 0.96);
}

.recommendation-focus-card .button-link {
    width: fit-content;
    margin-top: 18px;
}

.beautiful-empty-state {
    gap: 8px;
    min-height: 220px;
    padding: 28px;
}

.beautiful-empty-state .button-link {
    margin-top: 8px;
}

.tutor-empty-state::before {
    background:
        linear-gradient(var(--teal), var(--teal)) center 52% / 24px 3px no-repeat,
        radial-gradient(circle at center, rgba(4, 125, 135, 0.18), transparent 62%),
        rgba(255, 255, 255, 0.72);
}

.dashboard-section-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 18px;
}

.dashboard-section-heading h2,
.dashboard-section-heading p {
    margin-bottom: 0;
}

.quick-actions-grid {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 12px;
}

.quick-actions-grid a {
    display: grid;
    gap: 10px;
    align-content: center;
    min-height: 122px;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--ink);
    background: rgba(49, 87, 213, 0.05);
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.quick-actions-grid a:hover {
    background: rgba(49, 87, 213, 0.09);
}

.quick-actions-grid span {
    font-size: 1.8rem;
}

.dashboard-content-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.45fr) minmax(300px, 0.8fr);
    gap: 18px;
}

.activity-list {
    display: grid;
    gap: 12px;
}

.activity-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.activity-card div {
    display: grid;
    gap: 4px;
}

.activity-card div:last-child {
    text-align: right;
}

.activity-card strong {
    color: var(--ink);
}

.activity-card span {
    color: var(--muted);
    font-size: 0.9rem;
    font-weight: 700;
}

.dashboard-empty-state {
    min-height: 170px;
    display: grid;
    place-items: center;
    align-content: center;
    padding: 22px;
    border: 1px dashed rgba(49, 87, 213, 0.24);
    border-radius: 8px;
    text-align: center;
    background: rgba(49, 87, 213, 0.05);
}

.dashboard-empty-state h3,
.dashboard-empty-state p {
    margin-bottom: 0;
}

.chart-panel {
    display: grid;
    place-items: center;
    align-content: center;
    min-height: 285px;
    text-align: center;
}

.chart-icon {
    display: grid;
    place-items: center;
    width: 64px;
    height: 64px;
    margin-bottom: 14px;
    border-radius: 8px;
    color: #ffffff;
    background: var(--teal);
    font-size: 1.7rem;
}

.chart-panel p {
    margin-bottom: 0;
    font-weight: 900;
}

.chart-panel .button-link {
    margin-top: 14px;
}

.performance-summary-card {
    display: grid;
    gap: 18px;
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary), var(--teal));
    border-color: rgba(49, 87, 213, 0.18);
}

.performance-summary-card .eyebrow,
.performance-summary-card h2 {
    color: #ffffff;
}

.performance-summary-grid {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 12px;
}

.performance-summary-grid div,
.subject-analysis-grid article,
.performance-chart-card,
.insight-card {
    border: 1px solid rgba(49, 87, 213, 0.12);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.86);
}

.performance-summary-grid div {
    padding: 16px;
    color: var(--ink);
    background: rgba(255, 255, 255, 0.92);
}

.performance-summary-grid span,
.subject-analysis-grid span {
    display: block;
    margin-bottom: 6px;
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.performance-summary-grid strong,
.subject-analysis-grid strong {
    display: block;
    color: var(--ink);
    font-size: clamp(1.05rem, 1.7vw, 1.45rem);
}

.performance-stat-grid {
    grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
    margin-bottom: 0;
}

.recent-progress-panel {
    display: grid;
    gap: 14px;
}

.recent-progress-panel p {
    margin-bottom: 0;
    color: var(--muted);
    font-weight: 800;
}

.recent-progress-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 8px 12px;
    border: 1px solid rgba(49, 87, 213, 0.18);
    border-radius: 8px;
    color: var(--primary);
    background: rgba(49, 87, 213, 0.08);
    font-size: 0.92rem;
    overflow-wrap: anywhere;
}

.recent-progress-pill.up {
    color: #1f7a4d;
    background: rgba(31, 122, 77, 0.1);
    border-color: rgba(31, 122, 77, 0.2);
}

.recent-progress-pill.down {
    color: #b84335;
    background: rgba(226, 93, 79, 0.1);
    border-color: rgba(226, 93, 79, 0.2);
}

.overall-progress-meter {
    overflow: hidden;
    height: 12px;
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: 8px;
    background: rgba(49, 87, 213, 0.08);
}

.overall-progress-meter span {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--primary), var(--teal), var(--green));
}

.performance-chart-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    min-width: 0;
}

.performance-chart-card {
    min-width: 0;
    max-width: 100%;
    min-height: 360px;
    padding: 18px;
}

.performance-chart-card h3 {
    margin-bottom: 16px;
    color: var(--ink);
}

.performance-chart-card canvas {
    display: block;
    width: 100%;
    max-width: 100%;
    max-height: 285px;
}

.performance-chart-card-wide {
    grid-column: 1 / -1;
}

.subject-analysis-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}

.subject-analysis-grid article {
    padding: 16px;
}

.performance-table-wrap {
    max-width: 100%;
    overflow-x: auto;
}

.performance-table {
    min-width: 520px;
}

.insight-list {
    display: grid;
    gap: 12px;
}

.insight-card {
    display: grid;
    grid-template-columns: 38px minmax(0, 1fr);
    gap: 12px;
    align-items: center;
    padding: 14px;
}

.insight-card span {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: 8px;
    color: #ffffff;
    background: var(--amber);
}

.insight-card p {
    margin-bottom: 0;
    font-weight: 800;
}

.performance-activity-card strong,
.performance-activity-card span {
    overflow-wrap: anywhere;
}

.achievement-badge-grid,
.recommended-topic-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}

.achievement-badge,
.recommended-topic-card {
    min-height: 138px;
    padding: 18px;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, opacity 0.2s ease;
}

.achievement-badge span {
    display: inline-grid;
    place-items: center;
    width: 42px;
    height: 42px;
    margin-bottom: 12px;
    border-radius: 8px;
    background: rgba(189, 138, 32, 0.15);
    font-size: 1.35rem;
}

.achievement-badge strong,
.recommended-topic-card h3 {
    display: block;
    color: var(--ink);
    margin-bottom: 8px;
}

.achievement-badge p,
.recommended-topic-card p {
    margin-bottom: 0;
    font-size: 0.94rem;
}

.smart-recommendation-card {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
}

.smart-recommendation-card p {
    flex: 1;
    line-height: 1.45;
}

.smart-recommendation-card .button-link {
    margin-top: auto;
}

.recommendation-reason {
    display: inline-flex;
    align-items: center;
    min-height: 26px;
    padding: 4px 8px;
    border-radius: 8px;
    background: rgba(47, 111, 237, 0.12);
    color: var(--primary);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0;
    text-transform: uppercase;
}

.achievement-badge.locked {
    opacity: 0.52;
    filter: grayscale(0.9);
}

.recommended-topic-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.secondary-link {
    color: var(--primary);
    background: rgba(49, 87, 213, 0.08);
    border: 1px solid rgba(49, 87, 213, 0.22);
    box-shadow: none;
}

.secondary-link:hover {
    color: #ffffff;
}

.lesson-info-strip {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
    margin: 8px 0 28px;
}

.lesson-info-strip span {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--ink);
    background: rgba(49, 87, 213, 0.06);
    overflow-wrap: anywhere;
}

.lesson-info-strip strong {
    color: var(--muted);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 5000;
    width: 100%;
    height: 5px;
    pointer-events: none;
    background: rgba(49, 87, 213, 0.08);
}

.reading-progress span {
    display: block;
    width: 100%;
    height: 100%;
    transform: scaleX(0);
    transform-origin: left;
    background: linear-gradient(90deg, var(--primary), var(--teal), var(--green));
    box-shadow: 0 0 18px rgba(49, 87, 213, 0.24);
    transition: transform 0.18s ease-out;
}

.lesson-navigator {
    position: sticky;
    top: 12px;
    z-index: 70;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    width: fit-content;
    max-width: 100%;
    margin: -6px auto 20px;
    padding: 8px;
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: var(--radius-pill);
    background: rgba(255, 253, 248, 0.88);
    box-shadow: 0 14px 34px rgba(30, 40, 58, 0.12);
    backdrop-filter: blur(16px);
}

.lesson-navigator a {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 7px 11px;
    border: 1px solid transparent;
    border-radius: var(--radius-pill);
    color: var(--muted);
    font-size: 0.82rem;
    font-weight: 900;
    line-height: 1.2;
    text-decoration: none;
    white-space: nowrap;
    transition: color 0.18s ease, background 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.lesson-navigator a:hover,
.lesson-navigator a:focus-visible,
.lesson-navigator a.is-active {
    color: var(--primary);
    border-color: rgba(49, 87, 213, 0.18);
    background: rgba(49, 87, 213, 0.09);
    outline: none;
    transform: translateY(-1px);
}

.lesson-hero {
    position: relative;
    overflow: hidden;
    display: grid;
    gap: 14px;
    margin-bottom: 16px;
    padding: clamp(18px, 3vw, 30px);
    border: 1px solid rgba(49, 87, 213, 0.14);
    border-radius: var(--card-radius);
    background:
        linear-gradient(135deg, rgba(49, 87, 213, 0.08), rgba(4, 125, 135, 0.07), rgba(189, 138, 32, 0.06)),
        rgba(255, 253, 248, 0.94);
    box-shadow: var(--soft-shadow);
}

.lesson-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        radial-gradient(circle at 12% 0%, rgba(49, 87, 213, 0.12), transparent 36%),
        radial-gradient(circle at 92% 14%, rgba(4, 125, 135, 0.1), transparent 28%);
}

.lesson-hero > * {
    position: relative;
    z-index: 1;
}

.lesson-hero h1 {
    max-width: 880px;
    margin: 0;
    color: var(--ink);
    font-size: clamp(2rem, 4vw, 4rem);
    line-height: 1.04;
}

.learn-page .lesson-info-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 0;
}

.learn-page .lesson-info-strip span {
    display: inline-flex;
    flex-direction: row;
    align-items: center;
    gap: 8px;
    min-height: 38px;
    padding: 7px 11px;
    border-color: rgba(49, 87, 213, 0.14);
    border-radius: var(--radius-pill);
    background: rgba(255, 255, 255, 0.72);
    box-shadow: 0 6px 16px rgba(30, 40, 58, 0.05);
    font-size: 0.92rem;
}

.learn-page .lesson-info-strip strong {
    color: var(--primary);
    font-size: 0.72rem;
    letter-spacing: 0.05em;
}

.learn-page .lesson-primary-actions {
    margin: 10px 0 18px;
}

.learn-page hr {
    margin: 24px 0;
}

.learn-page :where(#lesson-start, #lesson-notes, #diagram-section, #revision-tools, #ai-tutor-step, #quiz-step, #flashcards-step, #mindmap-step, #memory-step) {
    scroll-margin-top: 96px;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(14px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pageFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes floatIllustration {
    0%,
    100% {
        transform: translate3d(0, 0, 0) rotate(0deg);
    }
    50% {
        transform: translate3d(0, -12px, 0) rotate(1.5deg);
    }
}

@keyframes progressGrow {
    from {
        transform: scaleX(0);
        transform-origin: left;
    }
    to {
        transform: scaleX(1);
        transform-origin: left;
    }
}

.content {
    max-width: 880px;
    margin: 0 auto;
    color: #2d3748;
    font-size: clamp(1.04rem, 1.35vw, 1.18rem);
    line-height: 1.82;
}

.content h1,
.content h2,
.content h3,
.diagram-card h2 {
    color: var(--primary);
    margin-top: 34px;
    margin-bottom: 14px;
    line-height: 1.18;
}

.content p {
    color: #3e4858;
    margin-bottom: 20px;
}

.content ul,
.content ol {
    margin: 16px 0 24px;
    padding-left: 1.4rem;
}

.content li {
    margin: 10px 0;
    padding-left: 6px;
}

.content strong {
    color: #172033;
    font-weight: 800;
    background: rgba(255, 207, 102, 0.35);
    border-radius: 6px;
    padding: 0 5px;
}

.content :where(table, pre, blockquote) {
    margin: 22px 0;
}

.content blockquote {
    padding: 16px 18px;
    border-left: 4px solid var(--primary);
    border-radius: var(--card-radius);
    color: var(--ink);
    background: rgba(49, 87, 213, 0.07);
}

.lesson-callout {
    position: relative;
    margin: 20px 0;
    padding: 15px 16px 15px 48px;
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-left-width: 5px;
    border-radius: var(--card-radius);
    background: rgba(49, 87, 213, 0.07);
    box-shadow: 0 8px 22px rgba(30, 40, 58, 0.06);
}

.lesson-callout::before {
    content: "i";
    position: absolute;
    top: 14px;
    left: 15px;
    display: grid;
    place-items: center;
    width: 22px;
    height: 22px;
    border-radius: 999px;
    color: #ffffff;
    background: var(--primary);
    font-size: 0.78rem;
    font-weight: 900;
}

.content li.lesson-callout {
    list-style: none;
}

.lesson-callout-definition {
    border-color: rgba(49, 87, 213, 0.2);
    border-left-color: var(--primary);
    background: rgba(49, 87, 213, 0.08);
}

.lesson-callout-remember {
    border-color: rgba(31, 122, 77, 0.22);
    border-left-color: var(--green);
    background: rgba(31, 122, 77, 0.08);
}

.lesson-callout-remember::before {
    content: "\2713";
    background: var(--green);
}

.lesson-callout-important {
    border-color: rgba(169, 109, 19, 0.25);
    border-left-color: var(--amber);
    background: rgba(169, 109, 19, 0.09);
}

.lesson-callout-important::before {
    content: "!";
    background: var(--amber);
}

.lesson-callout-example {
    border-color: rgba(126, 63, 196, 0.22);
    border-left-color: #7e3fc4;
    background: rgba(126, 63, 196, 0.08);
}

.lesson-callout-example::before {
    content: "Ex";
    background: #7e3fc4;
    font-size: 0.62rem;
}

.diagram-card {
    margin: 30px 0;
    padding: clamp(16px, 2.6vw, 24px);
}

.diagram-card h2 {
    margin-top: 0;
}

.diagram-data-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 12px 0 16px;
}

.diagram-data-list span {
    display: inline-flex;
    max-width: 100%;
    padding: 9px 12px;
    border: 1px solid rgba(49, 87, 213, 0.18);
    border-radius: 8px;
    color: var(--ink);
    background: rgba(49, 87, 213, 0.08);
    font-weight: 800;
    overflow-wrap: anywhere;
}

.diagram-image {
    display: block;
    width: 100%;
    max-width: 900px;
    height: auto;
    margin: 12px auto 0;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #ffffff;
}

.diagram-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 14px;
}

.diagram-actions form {
    display: inline-flex;
}

.diagram-unavailable {
    margin: 12px 0 0;
    padding: 16px;
    border: 1px dashed rgba(102, 112, 133, 0.45);
    border-radius: 8px;
    color: var(--muted);
    background: rgba(248, 250, 252, 0.75);
    font-weight: 800;
}

.diagram-fullscreen {
    position: fixed;
    inset: 18px;
    z-index: 2000;
    display: grid;
    align-content: start;
    overflow: auto;
    margin: 0;
    padding: 22px;
}

.diagram-fullscreen .diagram-image {
    max-width: none;
    max-height: calc(100vh - 150px);
    object-fit: contain;
}

.notes-download-form,
.quiz-start-form,
.result-actions {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 8px 12px 8px 0;
}

.continue-learning-section {
    position: relative;
    overflow: hidden;
    margin: 32px 0 18px;
    padding: clamp(20px, 3vw, 30px);
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: 8px;
    background:
        linear-gradient(135deg, rgba(49, 87, 213, 0.09), rgba(4, 125, 135, 0.08) 46%, rgba(189, 138, 32, 0.08)),
        rgba(255, 253, 248, 0.96);
    box-shadow: var(--soft-shadow);
    animation: fadeInUp 0.55s ease both;
}

.revision-tools-section {
    position: relative;
    overflow: hidden;
    margin: 30px 0 18px;
    padding: clamp(20px, 3vw, 28px);
    border: 1px solid rgba(31, 122, 77, 0.18);
    border-radius: var(--card-radius);
    background:
        linear-gradient(135deg, rgba(31, 122, 77, 0.1), rgba(49, 87, 213, 0.08), rgba(189, 138, 32, 0.08)),
        rgba(255, 253, 248, 0.96);
    box-shadow: var(--soft-shadow);
    animation: fadeInUp 0.55s ease both;
}

.revision-tools-section::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        linear-gradient(90deg, rgba(255, 255, 255, 0.34), transparent 36%),
        radial-gradient(circle at 88% 12%, rgba(31, 122, 77, 0.14), transparent 30%);
}

.revision-tools-section > * {
    position: relative;
}

.revision-tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
    gap: 12px;
}

.continue-learning-section::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        linear-gradient(90deg, rgba(255, 255, 255, 0.36), transparent 35%),
        radial-gradient(circle at 86% 12%, rgba(4, 125, 135, 0.14), transparent 28%);
}

.continue-learning-section > * {
    position: relative;
}

.continue-learning-heading {
    display: grid;
    gap: 8px;
    max-width: 760px;
    margin-bottom: 20px;
}

.continue-learning-heading .eyebrow {
    margin-bottom: 4px;
}

.continue-learning-heading h2,
.continue-learning-heading p {
    margin-bottom: 0;
}

.continue-learning-heading p {
    color: #445064;
    font-weight: 700;
}

.continue-learning-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
    gap: 12px;
}

.learning-action-card {
    position: relative;
    min-width: 0;
    min-height: 190px;
    padding: 16px;
    border: 1px solid rgba(231, 223, 210, 0.95);
    border-radius: 8px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.78), rgba(255, 253, 248, 0.96)),
        rgba(255, 253, 248, 0.96);
    box-shadow: 0 12px 28px rgba(30, 40, 58, 0.08);
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.learning-action-card:focus-within {
    border-color: rgba(49, 87, 213, 0.28);
    box-shadow:
        var(--focus-ring),
        0 12px 28px rgba(30, 40, 58, 0.08);
}

@media (hover: hover) and (pointer: fine) {
    .learning-action-card:hover {
        transform: translateY(-3px);
        border-color: rgba(49, 87, 213, 0.26);
        background:
            linear-gradient(180deg, rgba(255, 255, 255, 0.92), rgba(255, 253, 248, 0.99)),
            rgba(255, 253, 248, 0.98);
        box-shadow: 0 16px 34px rgba(30, 40, 58, 0.12);
    }
}

@media (hover: none) {
    .learning-action-card:hover {
        transform: none;
    }
}

.learning-card-tutor,
.learning-card-flashcards,
.learning-card-revision,
.learning-card-mindmap,
.learning-card-important,
.learning-card-memory,
.learning-action-card.is-coming-soon {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.learning-card-icon {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    flex: 0 0 auto;
    border-radius: 8px;
    color: #ffffff;
    background: var(--primary);
    font-size: 1.28rem;
    box-shadow: 0 12px 24px rgba(49, 87, 213, 0.18);
}

.learning-card-quiz .learning-card-icon {
    background: var(--teal);
}

.learning-card-download .learning-card-icon {
    background: var(--coral);
}

.learning-card-flashcards .learning-card-icon {
    background: var(--green);
}

.learning-card-mindmap .learning-card-icon {
    background: var(--amber);
}

.learning-card-revision .learning-card-icon {
    background: var(--gold);
}

.learning-card-important .learning-card-icon {
    background: var(--coral);
}

.learning-card-memory .learning-card-icon {
    background: linear-gradient(135deg, var(--primary), var(--teal));
}

.learning-card-note {
    margin: auto 0 0;
    color: var(--amber);
    font-size: 0.88rem;
    font-weight: 900;
}

.important-questions-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    font-size: 0.96rem;
}

.important-questions-content th,
.important-questions-content td {
    padding: 10px;
    border: 1px solid rgba(49, 87, 213, 0.16);
    text-align: left;
    vertical-align: top;
}

.important-questions-content th {
    color: var(--ink);
    background: rgba(49, 87, 213, 0.08);
}

.revision-shell {
    max-width: 1180px;
}

.revision-header p {
    margin: 8px 0 0;
    color: var(--muted);
    font-weight: 700;
}

.revision-command-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin: 18px 0 22px;
    padding: 14px;
    border: 1px solid rgba(231, 223, 210, 0.88);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.88);
    box-shadow: 0 12px 30px rgba(30, 40, 58, 0.08);
}

.revision-command-bar form {
    margin: 0;
}

.revision-command-bar .button-link,
.revision-command-bar button {
    min-height: 42px;
}

.revision-layout {
    display: grid;
    grid-template-columns: minmax(190px, 250px) minmax(0, 1fr);
    gap: 18px;
    align-items: start;
}

.revision-section-nav {
    position: sticky;
    top: 18px;
    display: grid;
    gap: 10px;
    padding: 16px;
    border: 1px solid rgba(49, 87, 213, 0.14);
    border-radius: 8px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(244, 248, 255, 0.92));
    box-shadow: 0 12px 28px rgba(30, 40, 58, 0.08);
}

.revision-section-nav span {
    display: block;
    padding: 9px 10px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.72);
    color: var(--ink);
    font-size: 0.92rem;
    font-weight: 800;
}

.revision-sheet-card {
    overflow: hidden;
    border: 1px solid rgba(231, 223, 210, 0.95);
    border-radius: 8px;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(255, 253, 248, 0.98)),
        rgba(255, 253, 248, 0.96);
    box-shadow: var(--soft-shadow);
    animation: fadeInUp 0.55s ease both;
}

.revision-sheet-content {
    padding: clamp(22px, 4vw, 42px);
    color: var(--ink);
}

.revision-sheet-content h1 {
    margin-bottom: 18px;
    color: var(--primary);
    font-size: clamp(1.8rem, 4vw, 2.8rem);
}

.revision-sheet-content h2 {
    margin: 28px 0 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(49, 87, 213, 0.16);
    color: var(--ink);
    font-size: clamp(1.24rem, 2.5vw, 1.7rem);
}

.revision-sheet-content p,
.revision-sheet-content li {
    color: #2f3a4f;
    font-size: 1rem;
    font-weight: 650;
    line-height: 1.75;
}

.revision-sheet-content ul,
.revision-sheet-content ol {
    padding-left: 1.25rem;
}

.study-plan-shell {
    max-width: 1180px;
}

.study-plan-header p {
    margin: 8px 0 0;
    color: var(--muted);
    font-weight: 700;
}

.study-plan-preview-section,
.study-plan-card {
    position: relative;
    margin: 24px 0;
    padding: clamp(18px, 3vw, 28px);
    border: 1px solid rgba(231, 223, 210, 0.9);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.9);
    box-shadow: 0 14px 32px rgba(30, 40, 58, 0.08);
}

.study-plan-preview-card {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(180px, 260px) auto;
    gap: 16px;
    align-items: center;
    margin-top: 16px;
    padding: 16px;
    border: 1px solid rgba(49, 87, 213, 0.14);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.84);
}

.study-plan-preview-card strong,
.study-plan-task-copy strong {
    display: block;
    color: var(--ink);
    font-size: 1.02rem;
}

.study-plan-preview-card span,
.study-plan-task-copy span,
.today-study-goal-meta span {
    color: var(--muted);
    font-size: 0.9rem;
    font-weight: 800;
}

.study-plan-summary-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin: 18px 0;
}

.study-plan-summary-card {
    display: grid;
    gap: 8px;
    min-height: 126px;
    padding: 16px;
    border: 1px solid rgba(49, 87, 213, 0.13);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.88);
    box-shadow: 0 12px 28px rgba(30, 40, 58, 0.07);
}

.study-plan-summary-card span {
    color: var(--muted);
    font-size: 0.82rem;
    font-weight: 900;
    text-transform: uppercase;
}

.study-plan-summary-card strong {
    color: var(--ink);
    font-size: clamp(1.35rem, 3vw, 2rem);
}

.study-plan-summary-card.completed {
    border-color: rgba(47, 168, 118, 0.34);
    background: rgba(230, 248, 239, 0.92);
}

.study-plan-progress-track {
    overflow: hidden;
    width: 100%;
    height: 10px;
    border-radius: 999px;
    background: rgba(49, 87, 213, 0.12);
}

.study-plan-progress-track span {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--primary), var(--green));
}

.study-plan-task-list {
    display: grid;
    gap: 12px;
}

.study-plan-task {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr) auto;
    gap: 14px;
    align-items: center;
    min-height: 76px;
    padding: 14px;
    border: 1px solid rgba(49, 87, 213, 0.13);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.88);
}

.study-plan-task.completed {
    border-color: rgba(47, 168, 118, 0.32);
    background: rgba(242, 251, 246, 0.92);
}

.study-plan-task-status {
    display: inline-grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    color: #ffffff;
    background: var(--primary);
    font-weight: 950;
}

.study-plan-task.completed .study-plan-task-status {
    background: var(--green);
}

.study-plan-task form {
    margin: 0;
}

.study-plan-task .button-link,
.study-plan-task button {
    min-height: 40px;
    white-space: nowrap;
}

.study-plan-complete-label {
    padding: 8px 10px;
    border-radius: 999px;
    color: #176746;
    background: rgba(47, 168, 118, 0.14);
    font-size: 0.86rem;
    font-weight: 950;
}

.today-study-goal-panel {
    display: grid;
    gap: 12px;
}

.today-study-goal-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.today-study-goal-meta span {
    padding: 8px 10px;
    border: 1px solid rgba(49, 87, 213, 0.12);
    border-radius: 8px;
    background: rgba(49, 87, 213, 0.06);
}

.mindmap-shell {
    max-width: 1240px;
}

.mindmap-header p {
    margin: 8px 0 0;
    color: var(--muted);
    font-weight: 700;
}

.mindmap-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin: 18px 0;
    padding: 14px;
    border: 1px solid rgba(231, 223, 210, 0.88);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.9);
    box-shadow: 0 12px 30px rgba(30, 40, 58, 0.08);
}

.mindmap-toolbar form {
    margin: 0;
}

.mindmap-toolbar button,
.mindmap-toolbar .button-link {
    min-height: 42px;
}

.mindmap-stage {
    overflow: hidden;
    min-height: 620px;
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: 8px;
    background:
        linear-gradient(135deg, rgba(49, 87, 213, 0.08), rgba(4, 125, 135, 0.07), rgba(189, 138, 32, 0.08)),
        rgba(255, 253, 248, 0.96);
    box-shadow: var(--soft-shadow);
}

.mindmap-scroll {
    width: 100%;
    min-height: 620px;
    overflow: auto;
    padding: clamp(24px, 4vw, 46px);
}

.mindmap-canvas {
    min-width: 860px;
    transform-origin: top center;
    transition: transform 0.18s ease;
}

.mindmap-tree,
.mindmap-tree ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.mindmap-root-item {
    display: grid;
    justify-items: center;
    gap: 28px;
}

.mindmap-branches {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: clamp(18px, 2.6vw, 34px);
    width: 100%;
}

.mindmap-branches::before {
    content: "";
    position: absolute;
    top: -18px;
    left: 50%;
    width: 2px;
    height: 18px;
    background: rgba(49, 87, 213, 0.28);
}

.mindmap-branch-item {
    position: relative;
    display: grid;
    justify-items: center;
    gap: 24px;
    min-width: 150px;
    max-width: 230px;
}

.mindmap-branch-item::before {
    content: "";
    position: absolute;
    top: -18px;
    left: 50%;
    width: 2px;
    height: 18px;
    background: rgba(49, 87, 213, 0.28);
}

.mindmap-node {
    position: relative;
    z-index: 1;
    display: inline-grid;
    place-items: center;
    width: 100%;
    min-height: 58px;
    padding: 12px 16px;
    border: 1px solid rgba(49, 87, 213, 0.2);
    border-radius: 8px;
    color: #1f2a44;
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(244, 248, 255, 0.96)),
        #ffffff;
    box-shadow: 0 12px 24px rgba(30, 40, 58, 0.1);
    font: inherit;
    font-weight: 800;
    text-align: center;
    overflow-wrap: anywhere;
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.mindmap-node:hover,
.mindmap-node:focus-visible {
    transform: translateY(-2px);
    border-color: rgba(4, 125, 135, 0.42);
    box-shadow: 0 18px 32px rgba(30, 40, 58, 0.14);
}

.mindmap-node-root {
    width: min(320px, 86vw);
    min-height: 92px;
    padding: 18px 24px;
    border-color: rgba(4, 125, 135, 0.34);
    color: #ffffff;
    background:
        linear-gradient(135deg, #3157d5, #047d87 58%, #1f7a4d),
        #3157d5;
    box-shadow: 0 20px 46px rgba(49, 87, 213, 0.22);
    font-size: clamp(1.1rem, 2vw, 1.45rem);
}

.mindmap-node[aria-expanded]::after {
    content: "-";
    position: absolute;
    top: 8px;
    right: 8px;
    display: grid;
    place-items: center;
    width: 22px;
    height: 22px;
    border-radius: 999px;
    color: #3157d5;
    background: rgba(49, 87, 213, 0.1);
    font-size: 1rem;
    line-height: 1;
}

.mindmap-node-root[aria-expanded]::after {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.2);
}

.mindmap-branch-item.is-collapsed > .mindmap-node[aria-expanded]::after,
.mindmap-root-item.is-collapsed > .mindmap-node[aria-expanded]::after {
    content: "+";
}

.mindmap-branch-item.is-collapsed > .mindmap-branches,
.mindmap-root-item.is-collapsed > .mindmap-branches {
    display: none;
}

.learning-card-copy {
    min-width: 0;
}

.learning-card-copy h3,
.learning-card-copy strong {
    display: block;
    margin-bottom: 7px;
    color: var(--ink);
    font-size: 1.02rem;
    line-height: 1.25;
}

.learning-card-copy p,
.learning-card-copy span {
    display: block;
    margin-bottom: 0;
    color: var(--muted);
    font-size: 0.92rem;
    font-weight: 700;
    line-height: 1.55;
}

.learning-card-form {
    display: flex;
    margin-top: auto;
}

.learning-card-button {
    width: fit-content;
    margin-top: auto;
    min-height: 42px;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 0.9rem;
    text-decoration: none;
}

.learn-page .learning-card-button,
.learn-page .learning-card-plain-button,
.learn-page .button-link,
.learn-page button {
    transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.learning-card-plain-button {
    position: absolute;
    inset: 0;
    display: grid;
    grid-template-rows: auto 1fr auto;
    align-items: start;
    justify-items: start;
    gap: 12px;
    width: 100%;
    min-height: 100%;
    padding: 16px;
    border: 0;
    border-radius: 8px;
    color: var(--ink);
    background: transparent;
    box-shadow: none;
    text-align: left;
}

.learning-card-plain-button:hover,
.learning-card-plain-button:focus-visible {
    transform: none;
    background: transparent;
    box-shadow: none;
}

.learning-card-arrow {
    display: grid;
    place-items: center;
    width: 32px;
    height: 32px;
    margin-top: auto;
    border-radius: 999px;
    color: var(--primary);
    background: rgba(49, 87, 213, 0.1);
    font-weight: 900;
    transition: transform 0.18s ease, color 0.18s ease, background 0.18s ease;
}

.learning-action-card:hover .learning-card-arrow {
    transform: translateX(3px);
    color: #ffffff;
    background: var(--primary);
}

@media (hover: none) {
    .learning-action-card:hover .learning-card-arrow {
        transform: none;
        color: var(--primary);
        background: rgba(49, 87, 213, 0.1);
    }
}

.is-coming-soon {
    opacity: 0.92;
}

.is-coming-soon:hover {
    transform: translateY(-3px);
}

.coming-soon-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: fit-content;
    margin-top: auto;
    min-height: 32px;
    padding: 6px 10px;
    border: 1px solid rgba(169, 109, 19, 0.22);
    border-radius: 999px;
    color: var(--amber);
    background: rgba(189, 138, 32, 0.1);
    font-size: 0.78rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.flashcards-shell {
    width: min(1120px, calc(100% - 32px));
}

.flashcards-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 16px;
    padding: clamp(22px, 3vw, 34px);
    border: 1px solid rgba(231, 223, 210, 0.92);
    border-radius: var(--card-radius);
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.7), rgba(255, 253, 248, 0.94)),
        rgba(255, 253, 248, 0.94);
    box-shadow: var(--soft-shadow);
}

.flashcards-header h1 {
    margin-bottom: 10px;
    font-size: clamp(2rem, 3.6vw, 3.6rem);
}

.flashcards-header p {
    max-width: 720px;
    margin-bottom: 0;
    font-weight: 800;
}

.flashcards-header-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 10px;
}

.flashcard-success-banner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    margin: 16px 0;
    padding: clamp(18px, 3vw, 26px);
    border: 1px solid rgba(31, 122, 77, 0.22);
    border-radius: 8px;
    background:
        radial-gradient(circle at 92% 12%, rgba(4, 125, 135, 0.14), transparent 34%),
        linear-gradient(145deg, rgba(255, 255, 255, 0.76), rgba(255, 253, 248, 0.96)),
        rgba(255, 253, 248, 0.96);
    box-shadow: var(--soft-shadow);
}

.flashcard-success-banner h2 {
    margin-bottom: 6px;
    color: var(--ink);
    font-size: clamp(1.35rem, 2.4vw, 2rem);
}

.flashcard-success-banner p {
    margin-bottom: 4px;
    color: #445064;
    font-weight: 800;
}

.flashcard-success-banner .button-link {
    flex: 0 0 auto;
}

.flashcard-study-panel {
    display: grid;
    gap: 18px;
    max-width: 780px;
    margin: 18px auto;
    padding: clamp(20px, 4vw, 34px);
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: var(--card-radius);
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.76), rgba(255, 253, 248, 0.96)),
        rgba(255, 253, 248, 0.96);
    box-shadow: var(--shadow);
}

.flashcard-progress-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.flashcard-progress-row strong,
.flashcard-progress-row span {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 7px 11px;
    border-radius: 999px;
    font-weight: 900;
}

.flashcard-progress-row strong {
    color: var(--primary);
    background: rgba(49, 87, 213, 0.1);
}

.flashcard-progress-row span {
    color: var(--green);
    background: rgba(31, 122, 77, 0.1);
}

.flashcard-stage {
    display: grid;
    place-items: center;
    gap: 16px;
    width: 100%;
    min-height: clamp(300px, 42vh, 430px);
    padding: clamp(24px, 5vw, 46px);
    border: 1px solid rgba(49, 87, 213, 0.2);
    border-radius: var(--radius-lg);
    color: var(--ink);
    background:
        radial-gradient(circle at 12% 10%, rgba(49, 87, 213, 0.13), transparent 32%),
        linear-gradient(145deg, rgba(255, 255, 255, 0.92), rgba(255, 253, 248, 0.98));
    box-shadow: 0 24px 58px rgba(30, 40, 58, 0.14);
    text-align: center;
}

.flashcard-stage:hover {
    transform: translateY(-3px);
}

.flashcard-stage.is-flipped {
    border-color: rgba(4, 125, 135, 0.28);
    background:
        radial-gradient(circle at 88% 12%, rgba(4, 125, 135, 0.14), transparent 32%),
        linear-gradient(145deg, rgba(255, 255, 255, 0.94), rgba(247, 252, 252, 0.98));
}

.flashcard-stage.is-mastered {
    box-shadow:
        0 0 0 4px rgba(31, 122, 77, 0.09),
        0 24px 58px rgba(30, 40, 58, 0.14);
}

.flashcard-stage.needs-revision {
    box-shadow:
        0 0 0 4px rgba(189, 138, 32, 0.11),
        0 24px 58px rgba(30, 40, 58, 0.14);
}

.flashcard-side-label {
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.flashcard-text {
    max-width: 620px;
    color: var(--ink);
    font-size: clamp(1.45rem, 3vw, 2.4rem);
    font-weight: 900;
    line-height: 1.28;
}

.flashcard-primary-actions,
.flashcard-secondary-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
}

.flashcard-keyboard-hint {
    margin-bottom: 0;
    text-align: center;
    font-weight: 800;
}

.memory-match-shell {
    width: min(1180px, calc(100% - 32px));
}

.memory-match-header {
    margin-bottom: 14px;
}

.memory-command-panel {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    margin: 0 0 16px;
    padding: 14px;
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.9);
    box-shadow: var(--soft-shadow);
}

.memory-mode-switch {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.memory-mode-switch a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 42px;
    padding: 8px 12px;
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: 999px;
    color: var(--ink);
    background: rgba(255, 255, 255, 0.62);
    font-weight: 900;
    text-decoration: none;
    transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.memory-mode-switch a span {
    color: var(--muted);
    font-size: 0.82rem;
}

.memory-mode-switch a.active,
.memory-mode-switch a:hover {
    border-color: rgba(49, 87, 213, 0.34);
    background: rgba(49, 87, 213, 0.12);
    transform: translateY(-1px);
}

.memory-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px;
}

.memory-stats-grid,
.memory-hud {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 10px;
    margin-bottom: 16px;
}

.memory-stats-grid article,
.memory-hud article,
.memory-completion-grid article {
    min-width: 0;
    padding: 12px;
    border: 1px solid rgba(49, 87, 213, 0.14);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.92);
    box-shadow: var(--soft-shadow);
}

.memory-stats-grid span,
.memory-hud span,
.memory-completion-grid span {
    display: block;
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 900;
    text-transform: uppercase;
}

.memory-stats-grid strong,
.memory-hud strong,
.memory-completion-grid strong {
    display: block;
    margin-top: 5px;
    color: var(--ink);
    font-size: clamp(1.15rem, 2.1vw, 1.65rem);
    line-height: 1.1;
}

.memory-progress-track {
    height: 12px;
    margin: 0 0 18px;
    overflow: hidden;
    border-radius: 999px;
    background: rgba(49, 87, 213, 0.12);
}

.memory-progress-track span {
    display: block;
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--green), var(--teal), var(--primary));
    transition: width 0.28s var(--ease-premium);
}

.memory-board {
    --memory-card-size: clamp(92px, 13vw, 150px);
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: clamp(10px, 2vw, 16px);
    perspective: 1200px;
}

.memory-card {
    position: relative;
    width: 100%;
    aspect-ratio: 1 / 1.15;
    min-height: 120px;
    padding: 0;
    border: 0;
    border-radius: 8px;
    background: transparent;
    box-shadow: none;
    transform-style: preserve-3d;
}

.memory-card:focus-visible {
    outline: 3px solid rgba(49, 87, 213, 0.38);
    outline-offset: 3px;
}

.memory-card-inner {
    position: absolute;
    inset: 0;
    border-radius: 8px;
    transform-style: preserve-3d;
    transition: transform 0.48s cubic-bezier(0.2, 0.7, 0.2, 1), filter 0.24s ease;
}

.memory-card:hover .memory-card-inner {
    filter: brightness(1.03);
}

.memory-card.flipped .memory-card-inner,
.memory-card.matched .memory-card-inner {
    transform: rotateY(180deg);
}

.memory-card-face {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    padding: clamp(10px, 2vw, 16px);
    border: 1px solid rgba(49, 87, 213, 0.18);
    border-radius: 8px;
    backface-visibility: hidden;
    box-shadow: 0 14px 32px rgba(30, 40, 58, 0.16);
    overflow: hidden;
}

.memory-card-back {
    color: #ffffff;
    background:
        linear-gradient(135deg, rgba(49, 87, 213, 0.96), rgba(4, 125, 135, 0.9)),
        var(--primary);
    font-size: clamp(2rem, 5vw, 3.2rem);
}

.memory-card-icon {
    display: grid;
    place-items: center;
    width: clamp(46px, 8vw, 66px);
    height: clamp(46px, 8vw, 66px);
    border: 1px solid rgba(255, 255, 255, 0.46);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.14);
    font-size: clamp(1rem, 3vw, 1.35rem);
    font-weight: 1000;
    letter-spacing: 0;
}

.memory-card-front {
    transform: rotateY(180deg);
    align-content: center;
    gap: 8px;
    color: var(--ink);
    background:
        radial-gradient(circle at 12% 10%, rgba(189, 138, 32, 0.14), transparent 34%),
        linear-gradient(145deg, rgba(255, 255, 255, 0.96), rgba(255, 253, 248, 0.98));
    text-align: center;
}

.memory-card-front small {
    color: var(--teal);
    font-size: 0.68rem;
    font-weight: 900;
    text-transform: uppercase;
}

.memory-card-front strong {
    display: -webkit-box;
    -webkit-line-clamp: 6;
    -webkit-box-orient: vertical;
    overflow: hidden;
    color: var(--ink);
    font-size: clamp(0.82rem, 1.35vw, 1.02rem);
    line-height: 1.22;
}

.memory-card.matched {
    pointer-events: none;
}

.memory-card.matched .memory-card-face {
    border-color: rgba(31, 122, 77, 0.44);
    box-shadow:
        0 0 0 4px rgba(31, 122, 77, 0.12),
        0 14px 32px rgba(31, 122, 77, 0.18);
    animation: memoryMatchPulse 0.62s ease both;
}

.memory-card.wrong-shake .memory-card-inner {
    animation: memoryWrongShake 0.42s ease both;
}

.memory-card.match-glow .memory-card-front {
    box-shadow:
        0 0 0 4px rgba(47, 159, 103, 0.16),
        0 18px 42px rgba(47, 159, 103, 0.24);
}

.memory-empty-state {
    padding: clamp(28px, 5vw, 48px);
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: 8px;
    background:
        radial-gradient(circle at 50% 0%, rgba(49, 87, 213, 0.12), transparent 34%),
        linear-gradient(145deg, rgba(255, 255, 255, 0.78), rgba(255, 253, 248, 0.96)),
        rgba(255, 253, 248, 0.94);
    box-shadow: var(--shadow);
    text-align: center;
}

.memory-empty-state .eyebrow {
    justify-content: center;
}

.memory-empty-state h2 {
    margin: 10px auto;
    max-width: 620px;
    font-size: clamp(1.5rem, 3vw, 2.4rem);
}

.memory-empty-state p {
    max-width: 620px;
    margin: 0 auto 18px;
    color: #445064;
    font-weight: 800;
}

.memory-empty-icon {
    display: grid;
    place-items: center;
    width: 64px;
    height: 64px;
    margin: 0 auto 14px;
    border-radius: 50%;
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary), var(--teal));
    box-shadow: 0 16px 32px rgba(49, 87, 213, 0.2);
    font-size: 1.8rem;
}

.confetti-canvas {
    position: fixed;
    inset: 0;
    z-index: 120;
    pointer-events: none;
}

.memory-completion-backdrop {
    position: fixed;
    inset: 0;
    z-index: 110;
    display: grid;
    place-items: center;
    padding: 18px;
    background: rgba(16, 20, 31, 0.62);
    backdrop-filter: blur(10px);
}

.memory-completion-backdrop[hidden] {
    display: none;
}

.memory-completion-modal {
    width: min(560px, 100%);
    padding: clamp(22px, 4vw, 34px);
    border: 1px solid rgba(255, 255, 255, 0.36);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.98);
    box-shadow: 0 28px 80px rgba(0, 0, 0, 0.28);
    animation: fadeInUp 0.26s ease both;
}

.memory-completion-modal > span {
    display: inline-grid;
    place-items: center;
    width: 54px;
    height: 54px;
    margin-bottom: 12px;
    border-radius: 50%;
    background: rgba(189, 138, 32, 0.14);
    font-size: 1.8rem;
}

.memory-completion-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin: 16px 0;
}

.memory-completion-actions form {
    display: inline-flex;
}

.memory-level-progress {
    display: grid;
    gap: 10px;
    margin-bottom: 16px;
}

.memory-level-progress > div:first-child {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.memory-level-progress span,
.memory-unlocks {
    color: var(--muted);
    font-weight: 800;
}

.memory-unlocks {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 18px;
}

.memory-unlocks strong,
.memory-unlocks span {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(49, 87, 213, 0.1);
}

.memory-match-dashboard-card small {
    display: block;
    margin-top: 5px;
    color: var(--muted);
    font-weight: 800;
    line-height: 1.35;
}

@keyframes memoryMatchPulse {
    0% {
        transform: scale(1);
    }
    42% {
        transform: scale(1.045);
    }
    100% {
        transform: scale(1);
    }
}

@keyframes memoryWrongShake {
    0%,
    100% {
        transform: rotateY(180deg) translateX(0);
    }
    20% {
        transform: rotateY(180deg) translateX(-7px);
    }
    40% {
        transform: rotateY(180deg) translateX(7px);
    }
    60% {
        transform: rotateY(180deg) translateX(-5px);
    }
    80% {
        transform: rotateY(180deg) translateX(5px);
    }
}

.tutor-shell {
    position: relative;
    z-index: 1;
    display: grid;
    gap: 16px;
    width: min(1180px, calc(100% - 32px));
    margin: 34px auto;
}

.tutor-header,
.tutor-chat-panel {
    border: 1px solid rgba(231, 223, 210, 0.92);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.94);
    box-shadow: var(--soft-shadow);
}

.tutor-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    padding: clamp(22px, 3vw, 34px);
}

.tutor-header h1 {
    margin-bottom: 10px;
    font-size: clamp(2rem, 3.6vw, 3.6rem);
}

.tutor-header p {
    max-width: 760px;
    margin-bottom: 0;
    color: #445064;
    font-weight: 700;
}

.tutor-header-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 10px;
}

.tutor-lesson-strip {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 10px;
}

.tutor-lesson-strip span {
    display: grid;
    gap: 4px;
    min-width: 0;
    padding: 13px 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--ink);
    background: rgba(255, 253, 248, 0.9);
    box-shadow: var(--soft-shadow);
    overflow-wrap: anywhere;
}

.tutor-lesson-strip strong {
    color: var(--muted);
    font-size: 0.76rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.tutor-chat-panel {
    display: grid;
    grid-template-rows: minmax(420px, calc(100vh - 390px)) auto;
    overflow: hidden;
}

.tutor-messages {
    display: flex;
    flex-direction: column;
    gap: 16px;
    min-height: 420px;
    overflow-y: auto;
    padding: clamp(18px, 3vw, 28px);
    scroll-behavior: smooth;
}

.tutor-message-row {
    display: flex;
    gap: 10px;
    max-width: min(760px, 92%);
}

.tutor-message-row.student {
    align-self: flex-end;
    justify-content: flex-end;
}

.tutor-message-row.assistant {
    align-self: flex-start;
}

.tutor-avatar {
    display: grid;
    place-items: center;
    flex: 0 0 auto;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    color: #ffffff;
    background: var(--teal);
    box-shadow: var(--soft-shadow);
}

.tutor-message {
    min-width: 0;
    padding: 14px 16px;
    border: 1px solid rgba(231, 223, 210, 0.9);
    border-radius: 8px;
    background: #ffffff;
    box-shadow: 0 8px 20px rgba(30, 40, 58, 0.08);
}

.student .tutor-message {
    color: #ffffff;
    background: var(--primary);
    border-color: rgba(49, 87, 213, 0.2);
}

.tutor-message-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 6px 12px;
    margin-bottom: 8px;
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.tutor-message-meta time {
    color: inherit;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0;
    text-transform: none;
    opacity: 0.78;
}

.student .tutor-message-meta {
    color: rgba(255, 255, 255, 0.76);
}

.tutor-message-content {
    color: var(--ink);
    line-height: 1.72;
    overflow-wrap: anywhere;
}

.student .tutor-message-content {
    color: #ffffff;
    white-space: pre-wrap;
}

.tutor-message-content p,
.tutor-message-content ul,
.tutor-message-content ol,
.tutor-message-content table,
.tutor-message-content pre {
    margin-bottom: 12px;
}

.tutor-message-content > *:last-child {
    margin-bottom: 0;
}

.tutor-message-content ul,
.tutor-message-content ol {
    padding-left: 1.35rem;
}

.tutor-message-content table {
    width: 100%;
    border-collapse: collapse;
    overflow: hidden;
    border-radius: 8px;
}

.tutor-message-content th,
.tutor-message-content td {
    padding: 10px;
    border: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}

.tutor-message-content th {
    color: var(--ink);
    background: rgba(49, 87, 213, 0.08);
}

.tutor-message-content pre {
    overflow-x: auto;
    padding: 14px;
    border-radius: 8px;
    color: #f6f8fb;
    background: #172033;
}

.tutor-message-content code {
    padding: 2px 5px;
    border-radius: 5px;
    background: rgba(49, 87, 213, 0.1);
}

.tutor-message-content pre code {
    padding: 0;
    background: transparent;
}

.tutor-message-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px;
    margin-top: 12px;
}

.copy-response-button,
.regenerate-response-button {
    min-height: 34px;
    padding: 7px 10px;
    color: var(--primary);
    background: rgba(49, 87, 213, 0.08);
    border: 1px solid rgba(49, 87, 213, 0.18);
    box-shadow: none;
    font-size: 0.84rem;
}

.regenerate-response-button {
    color: var(--teal);
    background: rgba(4, 125, 135, 0.08);
    border-color: rgba(4, 125, 135, 0.18);
}

.copy-response-button:hover,
.regenerate-response-button:hover {
    color: #ffffff;
}

.tutor-starter-prompts,
.tutor-suggestion-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
}

.tutor-starter-prompts button,
.tutor-suggestion-chips button {
    width: auto;
    min-height: 34px;
    padding: 7px 11px;
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: 999px;
    color: var(--primary);
    background: rgba(49, 87, 213, 0.07);
    box-shadow: none;
    font-size: 0.82rem;
    font-weight: 900;
    line-height: 1.25;
    white-space: normal;
}

.tutor-starter-prompts button {
    color: var(--teal);
    background: rgba(4, 125, 135, 0.08);
    border-color: rgba(4, 125, 135, 0.18);
}

.tutor-starter-prompts button:hover,
.tutor-suggestion-chips button:hover {
    color: #ffffff;
    transform: translateY(-1px);
}

.tutor-quiz-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--line);
}

.tutor-quiz-cta strong {
    color: var(--ink);
}

.tutor-quiz-cta form {
    display: inline-flex;
}

.tutor-quiz-cta button {
    min-height: 40px;
    padding: 9px 12px;
}

.typing-indicator {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    min-height: 30px;
}

.thinking-label {
    margin-bottom: 8px;
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 900;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: var(--primary);
    animation: tutorTyping 0.9s infinite ease-in-out;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.14s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.28s;
}

.tutor-composer {
    padding: 16px;
    border-top: 1px solid var(--line);
    background: rgba(255, 253, 248, 0.98);
}

.tutor-composer label {
    display: block;
    margin-bottom: 8px;
    color: var(--ink);
    font-weight: 900;
}

.tutor-voice-tools {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}

.tutor-voice-tools button {
    width: auto;
    min-height: 40px;
    min-width: 0;
    padding: 8px 11px;
    border: 1px solid rgba(49, 87, 213, 0.18);
    border-radius: 8px;
    color: var(--primary);
    background: rgba(49, 87, 213, 0.08);
    box-shadow: none;
    font-size: 0.84rem;
    font-weight: 900;
    line-height: 1.2;
}

.tutor-voice-tools button:hover:not(:disabled) {
    color: #ffffff;
    transform: translateY(-1px);
}

.tutor-voice-tools button:disabled {
    cursor: not-allowed;
    opacity: 0.48;
    transform: none;
}

#voice-status {
    min-width: min(220px, 100%);
    color: var(--muted);
    font-size: 0.86rem;
    font-weight: 800;
}

.tutor-input-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: end;
}

.tutor-input-row textarea {
    min-height: 58px;
    max-height: 180px;
    resize: none;
}

.tutor-input-row button {
    min-width: 104px;
    min-height: 58px;
}

.tutor-composer p {
    margin: 8px 0 0;
    color: var(--muted);
    font-size: 0.88rem;
    font-weight: 700;
}

@keyframes tutorTyping {
    0%,
    80%,
    100% {
        transform: translateY(0);
        opacity: 0.45;
    }
    40% {
        transform: translateY(-5px);
        opacity: 1;
    }
}

.quiz-container {
    max-width: 980px;
}

.history-container {
    max-width: 1120px;
}

.learning-history-container,
.saved-lesson-container {
    max-width: 1180px;
}

.history-tools {
    display: grid;
    grid-template-columns: minmax(260px, 1fr) minmax(180px, 0.35fr) minmax(170px, 0.3fr) auto;
    gap: 14px;
    align-items: end;
    margin-bottom: 22px;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.95);
    box-shadow: var(--soft-shadow);
}

.learning-history-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.learning-history-card,
.learning-locked-panel,
.saved-quiz-card {
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.95);
    box-shadow: var(--soft-shadow);
}

.learning-history-card {
    display: grid;
    gap: 18px;
    padding: 20px;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.learning-history-card:hover {
    transform: translateY(-3px);
    border-color: rgba(49, 87, 213, 0.2);
    box-shadow: 0 18px 38px rgba(30, 40, 58, 0.13);
}

.lesson-card-main {
    display: grid;
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 14px;
}

.lesson-card-icon {
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    border-radius: 8px;
    color: #ffffff;
    background: var(--primary);
    font-size: 1.25rem;
}

.learning-history-card h2 {
    margin-bottom: 10px;
}

.learning-history-card p {
    margin-bottom: 6px;
}

.lesson-card-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.lesson-card-actions form {
    display: inline-flex;
}

.favourite-placeholder:disabled {
    cursor: not-allowed;
    opacity: 0.62;
    transform: none;
}

.danger-link {
    color: #ffffff;
    background: var(--coral);
    box-shadow: 0 12px 24px rgba(196, 85, 63, 0.2);
}

.danger-link:hover {
    background: #a94331;
}

.learning-locked-panel {
    display: grid;
    place-items: center;
    align-content: center;
    min-height: 310px;
    padding: 34px;
    text-align: center;
}

.learning-locked-panel > span {
    display: grid;
    place-items: center;
    width: 64px;
    height: 64px;
    margin-bottom: 16px;
    border-radius: 999px;
    color: #ffffff;
    background: var(--primary);
    font-size: 1.7rem;
}

.learning-empty-state {
    display: grid;
    place-items: center;
    align-content: center;
    min-height: 280px;
    text-align: center;
}

.saved-quiz-card {
    margin-top: 24px;
    padding: 22px;
}

.saved-quiz-card ol {
    margin: 0;
    padding-left: 24px;
    color: var(--ink);
    font-weight: 700;
}

.saved-quiz-card li {
    margin: 12px 0;
    line-height: 1.6;
}

.history-intro {
    max-width: 680px;
}

.history-table-wrap {
    margin-top: 24px;
    overflow-x: auto;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.9);
    box-shadow: var(--soft-shadow);
}

.history-table {
    width: 100%;
    min-width: 820px;
    border-collapse: collapse;
}

.history-table th,
.history-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}

.history-table th {
    color: var(--muted);
    background: rgba(49, 87, 213, 0.06);
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.history-table tr:last-child td {
    border-bottom: 0;
}

.empty-history {
    margin-top: 24px;
    padding: clamp(22px, 4vw, 36px);
    border: 1px dashed rgba(49, 87, 213, 0.3);
    border-radius: 8px;
    background: rgba(49, 87, 213, 0.06);
    text-align: center;
}

.downloads-main {
    gap: 20px;
}

.download-center-hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: clamp(22px, 4vw, 34px);
    border: 1px solid var(--line);
    border-radius: 8px;
    background:
        linear-gradient(135deg, rgba(49, 87, 213, 0.1), rgba(4, 125, 135, 0.08), rgba(189, 138, 32, 0.1)),
        rgba(255, 253, 248, 0.96);
    box-shadow: var(--soft-shadow);
}

.download-center-hero h2 {
    margin-bottom: 8px;
    font-size: clamp(1.45rem, 2vw, 2rem);
}

.download-center-hero p {
    max-width: 720px;
    margin-bottom: 0;
    color: var(--muted);
    font-weight: 800;
}

.download-center-count {
    display: grid;
    place-items: center;
    flex: 0 0 116px;
    width: 116px;
    min-height: 116px;
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: 8px;
    color: var(--primary);
    background: rgba(255, 255, 255, 0.72);
}

.download-center-count strong {
    color: var(--primary);
    font-size: 2.5rem;
    line-height: 1;
}

.download-center-count span {
    color: var(--muted);
    font-weight: 900;
}

.download-report-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.download-report-card {
    display: grid;
    gap: 18px;
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.96);
    box-shadow: var(--soft-shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.download-report-card:hover {
    transform: translateY(-3px);
    border-color: rgba(49, 87, 213, 0.2);
    box-shadow: 0 18px 38px rgba(30, 40, 58, 0.13);
}

.download-report-main {
    display: grid;
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 14px;
    align-items: start;
}

.download-report-icon,
.download-empty-icon {
    display: grid;
    place-items: center;
    width: 52px;
    height: 52px;
    border-radius: 8px;
    color: #ffffff;
    background: var(--primary);
    box-shadow: var(--soft-shadow);
    font-size: 1.35rem;
}

.download-report-card h2 {
    margin-bottom: 10px;
    font-size: 1.15rem;
    overflow-wrap: anywhere;
}

.download-report-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.download-report-meta span {
    padding: 7px 10px;
    border: 1px solid rgba(49, 87, 213, 0.13);
    border-radius: 8px;
    color: var(--muted);
    background: rgba(49, 87, 213, 0.06);
    font-size: 0.82rem;
    font-weight: 900;
}

.download-report-details {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin: 0;
}

.download-report-details div {
    min-width: 0;
    padding: 12px;
    border: 1px solid rgba(4, 125, 135, 0.12);
    border-radius: 8px;
    background: rgba(4, 125, 135, 0.06);
}

.download-report-details dt {
    margin-bottom: 4px;
    color: var(--muted);
    font-size: 0.76rem;
    font-weight: 900;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.download-report-details dd {
    margin: 0;
    color: var(--ink);
    font-weight: 900;
    overflow-wrap: anywhere;
}

.download-report-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.download-report-actions form {
    display: inline-flex;
}

.download-empty-state {
    display: grid;
    place-items: center;
    align-content: center;
    min-height: 360px;
    padding: clamp(26px, 5vw, 48px);
    border: 1px dashed rgba(49, 87, 213, 0.32);
    border-radius: 8px;
    background:
        linear-gradient(135deg, rgba(49, 87, 213, 0.07), rgba(31, 122, 77, 0.06)),
        rgba(255, 253, 248, 0.92);
    text-align: center;
}

.download-empty-state .download-empty-icon {
    width: 76px;
    height: 76px;
    margin-bottom: 18px;
    background: var(--teal);
    font-size: 2rem;
}

.download-empty-state h2 {
    margin-bottom: 8px;
}

.download-empty-state p {
    max-width: 560px;
    margin-bottom: 20px;
    color: var(--muted);
    font-weight: 800;
}

.lesson-primary-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 18px 0 4px;
}

.lesson-primary-actions form {
    display: inline-flex;
}

.favourite-toggle {
    min-height: 44px;
}

.favourite-toggle.is-active {
    color: #5d3d04;
    border-color: rgba(189, 138, 32, 0.34);
    background: rgba(255, 207, 117, 0.36);
}

.favourite-notes-main {
    gap: 20px;
}

.favourite-notes-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.favourite-note-card {
    display: grid;
    gap: 18px;
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.96);
    box-shadow: var(--soft-shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.favourite-note-card:hover {
    transform: translateY(-3px);
    border-color: rgba(189, 138, 32, 0.28);
    box-shadow: 0 18px 38px rgba(30, 40, 58, 0.13);
}

.favourite-note-card-header {
    display: grid;
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 14px;
    align-items: start;
}

.favourite-note-icon,
.favourite-empty-icon {
    display: grid;
    place-items: center;
    width: 52px;
    height: 52px;
    border-radius: 8px;
    color: #5d3d04;
    background: rgba(255, 207, 117, 0.7);
    box-shadow: var(--soft-shadow);
    font-size: 1.35rem;
}

.favourite-note-card h2 {
    margin-bottom: 0;
    font-size: 1.16rem;
    overflow-wrap: anywhere;
}

.favourite-note-meta {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
    margin: 0;
}

.favourite-note-meta div {
    min-width: 0;
    padding: 12px;
    border: 1px solid rgba(4, 125, 135, 0.12);
    border-radius: 8px;
    background: rgba(4, 125, 135, 0.06);
}

.favourite-note-meta dt {
    margin-bottom: 4px;
    color: var(--muted);
    font-size: 0.76rem;
    font-weight: 900;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.favourite-note-meta dd {
    margin: 0;
    color: var(--ink);
    font-weight: 900;
    overflow-wrap: anywhere;
}

.favourite-note-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.favourite-note-actions form {
    display: inline-flex;
}

.favourite-empty-state {
    display: grid;
    place-items: center;
    align-content: center;
    min-height: 360px;
    padding: clamp(26px, 5vw, 48px);
    border: 1px dashed rgba(189, 138, 32, 0.36);
    border-radius: 8px;
    background:
        linear-gradient(135deg, rgba(255, 207, 117, 0.16), rgba(4, 125, 135, 0.07)),
        rgba(255, 253, 248, 0.92);
    text-align: center;
}

.favourite-empty-state .favourite-empty-icon {
    width: 76px;
    height: 76px;
    margin-bottom: 18px;
    font-size: 2rem;
}

.favourite-empty-state h2 {
    margin-bottom: 8px;
}

.favourite-empty-state p {
    max-width: 560px;
    margin-bottom: 20px;
    color: var(--muted);
    font-weight: 800;
}

.quiz-box {
    margin-top: 26px;
    padding: clamp(18px, 3vw, 30px);
    border-left: 6px solid var(--teal);
}

.quiz-question {
    margin: 24px 0;
}

.quiz-question label {
    display: block;
    margin-bottom: 10px;
    color: var(--ink);
    font-size: 1.04rem;
    line-height: 1.5;
}

.quiz-back-button {
    margin-top: 20px;
    background: var(--teal);
    box-shadow: 0 12px 24px rgba(4, 125, 135, 0.22);
}

.progress-container {
    width: 100%;
    height: 12px;
    margin: 18px 0 28px;
    overflow: hidden;
    border-radius: 999px;
    background: #eadfcd;
}

.progress-bar {
    width: 75%;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--green), var(--teal), var(--primary));
    animation: fillBar 1.1s ease-out;
}

@keyframes fillBar {
    from {
        width: 0;
    }
    to {
        width: 75%;
    }
}

@keyframes scoreUnderline {
    to {
        transform: scaleX(1);
    }
}

@keyframes counterSettle {
    0% {
        transform: translateY(-1px) scale(1.015);
    }
    100% {
        transform: translateY(0) scale(1);
    }
}

.score-dashboard,
.dashboard,
.achievements {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.dashboard {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin: 20px 0 28px;
}

.achievements {
    grid-column: 1 / -1;
}

.score-card,
.card,
.recommendation-card,
.achievement-card {
    padding: 20px;
}

.score-card h2 {
    color: var(--primary);
    margin: 0;
    font-size: clamp(1.5rem, 2.4vw, 2rem);
}

.score-card:first-child {
    position: relative;
    overflow: hidden;
}

.score-card:first-child::after {
    content: "";
    position: absolute;
    inset: auto 18px 0;
    height: 3px;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--green), var(--teal), var(--primary));
    transform: scaleX(0);
    transform-origin: left;
    animation: scoreUnderline 1s var(--ease-premium) 0.25s forwards;
}

.score-card h2.is-counting,
.dashboard-stat-card strong.is-counting,
.weekly-summary-grid strong.is-counting,
.weekly-summary-panel > .dashboard-section-heading > strong.is-counting {
    color: var(--primary);
    font-variant-numeric: tabular-nums;
    transform: translateY(-1px);
}

.score-card h2.count-complete,
.dashboard-stat-card strong.count-complete {
    animation: counterSettle 0.28s var(--ease-premium) both;
}

.achievement-card {
    color: #fff;
    background: var(--ink);
    border-color: var(--ink);
    font-weight: 800;
}

.recommendation-card {
    grid-column: 1 / -1;
    border-left: 6px solid var(--amber);
}

.evaluation-summary-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
}

.evaluation-section,
.teacher-report {
    margin-top: 28px;
}

.compact-heading {
    align-items: end;
    margin-bottom: 16px;
}

.compact-heading h2 {
    margin: 0;
    font-size: clamp(1.3rem, 2vw, 1.8rem);
}

.evaluation-card-list,
.teacher-report-grid {
    display: grid;
    gap: 16px;
}

.evaluation-card {
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.92);
    box-shadow: var(--soft-shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.evaluation-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 18px 36px rgba(23, 32, 51, 0.12);
}

.evaluation-card.correct {
    border-color: rgba(47, 159, 103, 0.38);
    background: linear-gradient(135deg, rgba(231, 247, 239, 0.94), rgba(255, 253, 248, 0.96));
}

.evaluation-card.correct.success-motion {
    animation: successSettle 0.42s var(--ease-premium) both;
}

.evaluation-card.incorrect {
    border-color: rgba(217, 72, 72, 0.32);
    background: linear-gradient(135deg, rgba(255, 240, 240, 0.95), rgba(255, 253, 248, 0.96));
}

.evaluation-card.partial {
    border-color: rgba(197, 138, 24, 0.34);
    background: linear-gradient(135deg, rgba(255, 247, 220, 0.96), rgba(255, 253, 248, 0.96));
}

.evaluation-card-header,
.marks-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.evaluation-card-header h3 {
    margin: 0;
    color: var(--ink);
    font-size: 1.15rem;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 108px;
    padding: 8px 12px;
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 900;
}

.status-pill.correct {
    color: #147a45;
    background: rgba(47, 159, 103, 0.15);
}

.status-pill.incorrect {
    color: #b42318;
    background: rgba(217, 72, 72, 0.14);
}

.status-pill.partial {
    color: #946300;
    background: rgba(240, 179, 95, 0.2);
}

.question-text {
    margin: 16px 0;
    color: var(--ink);
    font-size: 1.05rem;
    font-weight: 800;
}

.answer-grid,
.teacher-report-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.answer-grid {
    display: grid;
    gap: 14px;
}

.answer-grid div,
.feedback-box,
.revision-tip,
.teacher-report-overview,
.teacher-report-card {
    padding: 16px;
    border: 1px solid rgba(49, 87, 213, 0.12);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.72);
}

.answer-grid span,
.marks-row strong,
.feedback-box strong,
.revision-tip strong {
    display: block;
    margin-bottom: 7px;
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.answer-grid p,
.feedback-box p,
.revision-tip p,
.teacher-report-overview p {
    margin: 0;
    color: var(--muted);
    line-height: 1.6;
}

.marks-row {
    margin-top: 14px;
    padding: 14px 16px;
    border-radius: 8px;
    background: rgba(49, 87, 213, 0.08);
}

.marks-row strong {
    margin: 0;
}

.marks-row span {
    color: var(--primary);
    font-size: 1.2rem;
    font-weight: 900;
}

.feedback-box,
.revision-tip {
    margin-top: 14px;
}

.revision-tip {
    border-color: rgba(240, 179, 95, 0.38);
    background: rgba(255, 247, 230, 0.88);
}

.teacher-report-overview {
    margin-bottom: 16px;
    border-left: 6px solid var(--primary);
}

.teacher-report-overview h3,
.teacher-report-card h3 {
    margin-top: 0;
    color: var(--ink);
}

.teacher-report-card ul {
    margin: 0;
    padding-left: 20px;
    color: var(--muted);
    line-height: 1.7;
}

.tip-box {
    margin-top: 26px;
    padding: 18px 20px;
    border-left: 6px solid var(--amber);
    color: #5a3d10;
    background: #fff7e6;
    font-weight: 700;
}

footer {
    margin-top: 30px;
    padding: clamp(20px, 3vw, 26px);
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 253, 248, 0.86);
    box-shadow: var(--soft-shadow);
    text-align: center;
}

footer p {
    margin: 7px 0 0;
    color: var(--muted);
    font-size: 0.9rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
    margin-bottom: 16px;
    text-align: left;
}

.footer-grid div {
    min-width: 0;
    padding: 12px;
    border: 1px solid rgba(49, 87, 213, 0.12);
    border-radius: 8px;
    background: rgba(49, 87, 213, 0.05);
}

.footer-grid span,
.footer-grid strong {
    display: block;
}

.footer-grid span {
    margin-bottom: 4px;
    color: var(--muted);
    font-size: 0.74rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.footer-grid strong {
    color: var(--ink);
    font-size: 0.94rem;
    line-height: 1.35;
}

.page-transition-overlay {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: grid;
    place-items: center;
    padding: clamp(18px, 5vw, 40px);
    background:
        linear-gradient(180deg, rgba(255, 253, 248, 0.88), rgba(247, 244, 238, 0.94)),
        rgba(255, 253, 248, 0.92);
    opacity: 0;
    pointer-events: none;
    backdrop-filter: blur(16px);
    transition: opacity 0.18s ease;
}

.page-transition-overlay[hidden] {
    display: none;
}

.page-transition-overlay.is-visible {
    opacity: 1;
    pointer-events: auto;
}

.page-transition-card {
    display: grid;
    justify-items: center;
    width: min(420px, 100%);
    padding: clamp(24px, 6vw, 38px);
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: 8px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.9), rgba(255, 253, 248, 0.96)),
        var(--surface);
    box-shadow: 0 24px 70px rgba(30, 40, 58, 0.22);
    text-align: center;
    transform: translateY(8px) scale(0.98);
    transition: transform 0.22s ease;
}

.page-transition-overlay.is-visible .page-transition-card {
    transform: translateY(0) scale(1);
}

.page-transition-brand {
    display: inline-grid;
    grid-template-columns: 52px minmax(0, 1fr);
    align-items: center;
    gap: 14px;
    margin-bottom: 24px;
    text-align: left;
}

.page-transition-logo {
    display: grid;
    place-items: center;
    width: 52px;
    aspect-ratio: 1;
    border-radius: 8px;
    color: #ffffff;
    background: linear-gradient(135deg, var(--primary), var(--teal));
    box-shadow: 0 12px 26px rgba(49, 87, 213, 0.28);
    font-size: 1rem;
    font-weight: 950;
    letter-spacing: 0;
}

.page-transition-brand strong,
.page-transition-brand span {
    display: block;
}

.page-transition-brand strong {
    color: var(--ink);
    font-size: clamp(1.15rem, 3vw, 1.45rem);
    line-height: 1.1;
}

.page-transition-brand div > span {
    margin-top: 5px;
    color: var(--muted);
    font-size: 0.88rem;
    font-weight: 800;
}

.page-transition-spinner {
    width: 58px;
    height: 58px;
    margin-bottom: 18px;
    border: 6px solid rgba(49, 87, 213, 0.16);
    border-top-color: var(--primary);
    border-right-color: var(--teal);
    border-radius: 50%;
    animation: spin 0.84s linear infinite;
}

.page-transition-overlay p {
    width: 100%;
    min-height: 48px;
    margin: 0;
    padding: 13px 16px;
    border: 1px solid rgba(49, 87, 213, 0.14);
    border-radius: 8px;
    color: var(--ink);
    background: rgba(49, 87, 213, 0.06);
    font-size: clamp(1rem, 2.5vw, 1.12rem);
    font-weight: 850;
    line-height: 1.35;
}

.page-transition-active {
    cursor: progress;
}

.page-transition-active body {
    pointer-events: none;
    user-select: none;
}

#loader {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 100;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 24px;
    text-align: center;
    background: rgba(255, 253, 248, 0.94);
    backdrop-filter: blur(12px);
}

#loader::before,
#loader::after {
    content: "";
    position: absolute;
    width: min(34vw, 280px);
    aspect-ratio: 1;
    border-radius: 50%;
    opacity: 0.12;
    pointer-events: none;
}

#loader::before {
    top: 8%;
    left: 8%;
    background: radial-gradient(circle, rgba(49, 87, 213, 0.45), transparent 68%);
}

#loader::after {
    right: 8%;
    bottom: 8%;
    background: radial-gradient(circle, rgba(4, 125, 135, 0.42), transparent 68%);
}

.spinner {
    width: 62px;
    height: 62px;
    margin-bottom: 22px;
    border: 7px solid rgba(49, 87, 213, 0.16);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.9s linear infinite;
}

#loader .spinner,
#loader .loader-icons,
#loader h2,
#loader-message {
    position: relative;
    z-index: 1;
}

.loader-icons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin: -8px 0 18px;
}

.loader-icons span {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.7);
    box-shadow: var(--soft-shadow);
    font-size: 1.18rem;
    animation: loaderIconFloat 2.6s ease-in-out infinite;
}

.loader-icons span:nth-child(2) {
    animation-delay: 0.25s;
}

.loader-icons span:nth-child(3) {
    animation-delay: 0.5s;
}

.loader-icons span:nth-child(4) {
    animation-delay: 0.75s;
}

.loader-icons span:nth-child(5) {
    animation-delay: 1s;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

#loader h2 {
    margin-bottom: 16px;
}

#loader p,
#loader-message {
    margin: 0;
    font-weight: 700;
}

#loader-message {
    width: min(420px, 100%);
    min-height: 54px;
    padding: 14px 18px;
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: 8px;
    color: var(--ink);
    background: rgba(255, 255, 255, 0.72);
    box-shadow: var(--soft-shadow);
    font-size: clamp(1rem, 1.5vw, 1.15rem);
    animation: loaderPulse 2s ease-in-out infinite;
}

.loader-steps {
    display: grid;
    gap: 10px;
    width: min(360px, 100%);
}

.loader-steps p {
    padding: 12px 14px;
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: 8px;
    color: var(--muted);
    background: rgba(255, 255, 255, 0.7);
    animation: loaderStep 2.4s ease-in-out infinite;
}

.loader-steps p:nth-child(2) {
    animation-delay: 0.8s;
}

.loader-steps p:nth-child(3) {
    animation-delay: 1.6s;
}

.loader-skeleton-stack {
    position: relative;
    z-index: 1;
    display: grid;
    gap: 10px;
    width: min(420px, 100%);
    margin-top: 18px;
}

.loader-skeleton-stack span,
.skeleton-line {
    display: block;
    height: 12px;
    overflow: hidden;
    border-radius: 999px;
    background:
        linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.62), transparent),
        rgba(49, 87, 213, 0.12);
    background-size: 220% 100%;
    animation: skeletonShimmer 1.45s var(--ease-premium) infinite;
}

.loader-skeleton-stack span:nth-child(2) {
    width: 84%;
}

.loader-skeleton-stack span:nth-child(3) {
    width: 62%;
}

@keyframes loaderStep {
    0%,
    100% {
        color: var(--muted);
        border-color: rgba(49, 87, 213, 0.16);
        box-shadow: none;
        transform: translateX(0);
    }
    35% {
        color: var(--ink);
        border-color: rgba(49, 87, 213, 0.42);
        box-shadow: 0 0 22px rgba(49, 87, 213, 0.22);
        transform: translateX(4px);
    }
}

@keyframes skeletonShimmer {
    from {
        background-position: 120% 0;
    }
    to {
        background-position: -120% 0;
    }
}

@keyframes successSettle {
    0% {
        opacity: 0;
        transform: translateY(-6px) scale(0.98);
    }
    70% {
        opacity: 1;
        transform: translateY(1px) scale(1.005);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes successSweep {
    to {
        transform: translateX(100%);
    }
}

@keyframes loaderIconFloat {
    0%,
    100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-8px);
    }
}

@keyframes loaderPulse {
    0%,
    100% {
        transform: translateY(0);
        box-shadow: var(--soft-shadow);
    }
    50% {
        transform: translateY(-2px);
        box-shadow: 0 0 28px rgba(49, 87, 213, 0.2);
    }
}

/* Premium UI polish layer */
:root {
    --card-radius: var(--radius-sm);
    --control-radius: var(--radius-sm);
    --ease-premium: cubic-bezier(0.2, 0.8, 0.2, 1);
    --lift-shadow: var(--shadow-xl);
    --focus-ring: 0 0 0 4px rgba(49, 87, 213, 0.16);
    --success-delay: 0ms;
}

::selection {
    color: #ffffff;
    background: var(--primary);
}

@supports (view-transition-name: root) {
    ::view-transition-old(root),
    ::view-transition-new(root) {
        animation-duration: 0.28s;
        animation-timing-function: var(--ease-premium);
    }
}

body {
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

a,
button,
input,
select,
textarea,
.dashboard-panel,
.dashboard-stat-card,
.activity-card,
.feature-card,
.why-study-grid article,
.platform-highlights-card,
.highlight-chip-grid span,
.learning-history-card,
.achievement-badge,
.recommended-topic-card,
.quick-actions-grid a,
.tutor-message,
.history-table tr,
.profile-dropdown a,
.sidebar-nav a {
    transition:
        color 0.22s var(--ease-premium),
        background 0.22s var(--ease-premium),
        border-color 0.22s var(--ease-premium),
        box-shadow 0.22s var(--ease-premium),
        transform 0.22s var(--ease-premium),
        opacity 0.22s var(--ease-premium);
}

.motion-enabled .motion-reveal {
    opacity: 0;
    transform: translate3d(0, 14px, 0);
    will-change: opacity, transform;
    transition:
        opacity 0.48s var(--ease-premium) var(--motion-delay, 0ms),
        transform 0.48s var(--ease-premium) var(--motion-delay, 0ms);
}

.motion-enabled .motion-reveal.is-visible {
    opacity: 1;
    transform: translate3d(0, 0, 0);
    will-change: auto;
}

.motion-enabled .motion-reveal.motion-ready {
    transition:
        color 0.22s var(--ease-premium),
        background 0.22s var(--ease-premium),
        border-color 0.22s var(--ease-premium),
        box-shadow 0.22s var(--ease-premium),
        transform 0.22s var(--ease-premium),
        opacity 0.22s var(--ease-premium);
}

.motion-enabled .dashboard-main > *,
.motion-enabled .learn-container > *,
.motion-enabled .container > *,
.motion-enabled .tutor-shell > * {
    animation: none;
}

.exhibition-header,
.project-team-card,
.welcome-card,
.platform-highlights-card,
.about-card,
.account-motivation-card,
.guest-locked-card,
.learn-container,
.hero,
.study-form,
.profile-card,
.dashboard-topbar,
.dashboard-panel,
.dashboard-stat-card,
.activity-card,
.achievement-badge,
.recommended-topic-card,
.locked-dashboard-card,
.performance-chart-card,
.insight-card,
.history-tools,
.history-table-wrap,
.learning-history-card,
.learning-locked-panel,
.saved-quiz-card,
.quiz-box,
.diagram-card,
.continue-learning-section,
.learning-action-card,
.tutor-header,
.tutor-chat-panel,
.tutor-lesson-strip span,
.tutor-message,
.student-sidebar,
footer {
    border-radius: var(--card-radius);
}

.feature-card,
.why-study-grid article,
.platform-highlights-card,
.dashboard-stat-card,
.dashboard-panel,
.activity-card,
.achievement-badge,
.recommended-topic-card,
.locked-dashboard-card,
.quick-actions-grid a,
.learning-action-card,
.learning-history-card,
.saved-quiz-card,
.score-card,
.card,
.recommendation-card,
.evaluation-card,
.teacher-report-card,
.footer-grid div {
    backface-visibility: hidden;
    transform: translateZ(0);
}

.school-mark,
.feature-icon,
.team-icon,
.sidebar-brand-icon,
.dashboard-stat-card > span,
.chart-icon,
.lesson-card-icon,
.tutor-avatar,
.learning-card-icon,
.achievement-badge span,
.insight-card span {
    border-radius: var(--radius-lg);
}

.dashboard-topbar,
.dashboard-panel,
.student-sidebar,
.tutor-header,
.tutor-chat-panel,
.learn-container,
.hero,
.study-form,
.profile-card {
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.7), rgba(255, 253, 248, 0.94)),
        rgba(255, 253, 248, 0.94);
    backdrop-filter: blur(18px);
}

.dashboard-quote-card {
    color: #ffffff;
    background:
        linear-gradient(135deg, rgba(49, 87, 213, 0.96), rgba(4, 125, 135, 0.92) 58%, rgba(31, 122, 77, 0.9)),
        var(--primary);
}

.dashboard-topbar,
.tutor-header,
.hero {
    position: relative;
}

.dashboard-topbar {
    z-index: 80;
    overflow: visible;
}

.tutor-header,
.hero {
    overflow: hidden;
}

.dashboard-topbar::before,
.tutor-header::before,
.hero::before,
.performance-summary-card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    pointer-events: none;
    background:
        radial-gradient(circle at 12% 0%, rgba(49, 87, 213, 0.14), transparent 34%),
        radial-gradient(circle at 92% 12%, rgba(4, 125, 135, 0.1), transparent 30%);
}

.dashboard-topbar > *,
.tutor-header > *,
.hero > *,
.performance-summary-card > * {
    position: relative;
    z-index: 1;
}

.dashboard-panel,
.feature-card,
.learning-history-card,
.achievement-badge,
.recommended-topic-card,
.performance-chart-card,
.insight-card,
.rbac-status-list div,
.rbac-table-grid article,
.developer-detail-grid article,
.quick-actions-grid a,
.quiz-question,
.answer-grid div,
.feedback-box,
.revision-tip,
.teacher-report-overview,
.teacher-report-card {
    box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.68) inset,
        var(--soft-shadow);
}

.dashboard-panel:hover,
.performance-chart-card:hover,
.profile-card:hover,
.quiz-box:hover,
.tutor-chat-panel:hover,
.history-table-wrap:hover {
    transform: translate3d(0, -2px, 0);
    border-color: rgba(49, 87, 213, 0.18);
    box-shadow: var(--lift-shadow);
}

@media (hover: hover) {
    .feature-card:hover,
    .dashboard-stat-card:hover,
    .activity-card:hover,
    .achievement-badge:hover,
    .recommended-topic-card:hover,
    .locked-dashboard-card:hover,
    .quick-actions-grid a:hover,
    .learning-action-card:hover,
    .learning-history-card:hover,
    .evaluation-card:hover {
        transform: translate3d(0, -4px, 0);
    }

    .score-card:hover,
    .card:hover,
    .recommendation-card:hover,
    .teacher-report-card:hover,
    .footer-grid div:hover,
    .saved-quiz-card:hover {
        transform: translateY(-3px);
        border-color: rgba(49, 87, 213, 0.2);
        box-shadow: 0 18px 38px rgba(30, 40, 58, 0.12);
    }
}

.dashboard-main > *,
.learn-container > *,
.container > *,
.tutor-shell > * {
    animation: fadeInUp 0.44s var(--ease-premium) both;
}

.dashboard-main > *:nth-child(2),
.learn-container > *:nth-child(2),
.container > *:nth-child(2),
.tutor-shell > *:nth-child(2) {
    animation-delay: 0.04s;
}

.dashboard-main > *:nth-child(3),
.learn-container > *:nth-child(3),
.container > *:nth-child(3),
.tutor-shell > *:nth-child(3) {
    animation-delay: 0.08s;
}

.dashboard-main > *:nth-child(n + 4),
.learn-container > *:nth-child(n + 4),
.container > *:nth-child(n + 4),
.tutor-shell > *:nth-child(n + 4) {
    animation-delay: 0.12s;
}

button,
.button-link,
.back-btn,
.profile-menu-button,
.auth-link {
    position: relative;
    overflow: hidden;
    border-radius: var(--control-radius);
    will-change: transform;
}

button::after,
.button-link::after,
.back-btn::after,
.profile-menu-button::after,
.auth-link::after {
    content: "";
    position: absolute;
    inset: 0;
    opacity: 0;
    pointer-events: none;
    background: linear-gradient(120deg, transparent 0%, rgba(255, 255, 255, 0.28) 42%, transparent 72%);
    transform: translateX(-110%);
    transition: transform 0.42s var(--ease-premium), opacity 0.22s ease;
}

button:hover::after,
.button-link:hover::after,
.back-btn:hover::after,
.profile-menu-button:hover::after,
.auth-link:hover::after {
    opacity: 1;
    transform: translateX(110%);
}

button:active,
.button-link:active,
.back-btn:active,
.profile-menu-button:active,
.auth-link:active {
    transform: translateY(1px) scale(0.985);
}

button.is-loading,
input[type="submit"].is-loading {
    color: transparent !important;
    pointer-events: none;
}

button.is-loading::before,
input[type="submit"].is-loading::before {
    content: "";
    position: absolute;
    inset: 50% auto auto 50%;
    width: 18px;
    height: 18px;
    margin: -9px 0 0 -9px;
    border: 3px solid rgba(255, 255, 255, 0.5);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 0.75s linear infinite;
}

.quiz-box.is-loading,
.study-form.is-loading,
.tutor-composer.is-loading,
.report-download-form.is-loading,
.learning-action-card.is-loading,
.quiz-start-form.is-loading,
.notes-download-form.is-loading {
    position: relative;
    overflow: hidden;
}

.quiz-box.is-loading::after,
.study-form.is-loading::after,
.report-download-form.is-loading::after,
.learning-action-card.is-loading::after,
.quiz-start-form.is-loading::after,
.notes-download-form.is-loading::after {
    content: "";
    position: absolute;
    left: 18px;
    right: 18px;
    bottom: 18px;
    height: 8px;
    border-radius: 999px;
    background:
        linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.72), transparent),
        rgba(49, 87, 213, 0.12);
    background-size: 220% 100%;
    animation: skeletonShimmer 1.25s var(--ease-premium) infinite;
}

.learning-action-card.is-loading::after,
.quiz-start-form.is-loading::after,
.notes-download-form.is-loading::after,
.report-download-form.is-loading::after {
    left: 12px;
    right: 12px;
    bottom: 10px;
    height: 6px;
}

button:disabled,
.button-link.disabled,
textarea:disabled,
input:disabled,
select:disabled {
    cursor: not-allowed;
    filter: saturate(0.8);
}

input,
select,
textarea {
    border-radius: var(--control-radius);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.75) inset;
}

input:hover,
select:hover,
textarea:hover {
    border-color: rgba(49, 87, 213, 0.34);
}

.form-field:focus-within label,
.tutor-composer:focus-within label {
    color: var(--primary);
}

input:focus,
select:focus,
textarea:focus {
    box-shadow:
        var(--focus-ring),
        0 10px 24px rgba(49, 87, 213, 0.1);
}

.student-sidebar {
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.74), rgba(255, 253, 248, 0.96)),
        rgba(255, 253, 248, 0.96);
    transition:
        transform 0.28s var(--ease-premium),
        box-shadow 0.28s var(--ease-premium),
        border-color 0.28s var(--ease-premium);
}

.sidebar-brand {
    margin: -4px -4px 12px;
    padding: 12px;
    border: 1px solid rgba(49, 87, 213, 0.12);
    border-radius: var(--card-radius);
    background: rgba(49, 87, 213, 0.05);
}

.sidebar-nav a {
    position: relative;
}

.sidebar-nav a::before {
    content: "";
    position: absolute;
    top: 10px;
    bottom: 10px;
    left: 0;
    width: 3px;
    border-radius: 999px;
    background: var(--primary);
    opacity: 0;
    transform: scaleY(0.45);
    transition: opacity 0.2s ease, transform 0.2s var(--ease-premium);
}

.sidebar-nav a:hover::before,
.sidebar-nav a.active::before {
    opacity: 1;
    transform: scaleY(1);
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    box-shadow: 0 10px 24px rgba(49, 87, 213, 0.1);
}

.student-sidebar:hover {
    border-color: rgba(49, 87, 213, 0.18);
    box-shadow: 0 18px 42px rgba(30, 40, 58, 0.12);
}

.student-sidebar.is-ready .sidebar-brand-icon,
.dashboard-stat-card > span,
.chart-icon,
.learning-card-icon,
.feature-icon {
    transition: transform 0.22s var(--ease-premium), box-shadow 0.22s var(--ease-premium);
}

.student-sidebar.is-ready:hover .sidebar-brand-icon,
.dashboard-stat-card:hover > span,
.learning-action-card:hover .learning-card-icon,
.feature-card:hover .feature-icon {
    transform: translate3d(0, -2px, 0) scale(1.03);
}

@media (hover: none) {
    .learning-action-card:hover .learning-card-icon {
        transform: none;
    }
}

@media (min-width: 901px) {
    .student-sidebar.is-ready {
        animation: sidebarSettle 0.38s var(--ease-premium) both;
    }
}

.dashboard-stat-card,
.performance-summary-grid div,
.subject-analysis-grid article,
.rbac-table-grid article,
.developer-detail-grid article {
    position: relative;
    overflow: hidden;
}

.dashboard-stat-card::after,
.performance-summary-grid div::after,
.subject-analysis-grid article::after,
.rbac-table-grid article::after,
.developer-detail-grid article::after {
    content: "";
    position: absolute;
    inset: auto 0 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--teal), var(--amber));
    opacity: 0.55;
}

.dashboard-stat-card strong,
.performance-summary-grid strong,
.rbac-table-grid strong {
    letter-spacing: 0;
}

.score-motion .score-card:first-child {
    animation: scoreSettle 0.52s var(--ease-premium) 0.12s both;
}

.score-card h2.count-complete {
    text-shadow: 0 0 18px rgba(49, 87, 213, 0.22);
}

.status-pill.success-motion,
.result-page .badge.success-motion,
.flash-success.success-motion,
.evaluation-card.correct.success-motion {
    animation-delay: var(--success-delay, 0ms);
}

.quick-actions-grid a {
    background:
        linear-gradient(145deg, rgba(49, 87, 213, 0.07), rgba(4, 125, 135, 0.05)),
        rgba(255, 253, 248, 0.94);
}

.quick-actions-grid span,
.locked-dashboard-card span {
    filter: drop-shadow(0 8px 14px rgba(30, 40, 58, 0.1));
}

.dashboard-empty-state,
.empty-history,
.learning-empty-state {
    position: relative;
    overflow: hidden;
    border-radius: var(--card-radius);
    background:
        linear-gradient(145deg, rgba(49, 87, 213, 0.07), rgba(4, 125, 135, 0.06)),
        rgba(255, 253, 248, 0.82);
}

.dashboard-empty-state::before,
.empty-history::before,
.learning-empty-state::before {
    content: "";
    display: grid;
    place-items: center;
    width: 54px;
    height: 54px;
    margin-bottom: 12px;
    border: 1px solid rgba(49, 87, 213, 0.18);
    border-radius: var(--radius-lg);
    color: var(--primary);
    background:
        linear-gradient(var(--primary), var(--primary)) center / 22px 3px no-repeat,
        linear-gradient(var(--primary), var(--primary)) center / 3px 22px no-repeat,
        rgba(255, 255, 255, 0.72);
    box-shadow: var(--soft-shadow);
    font-size: 1.8rem;
}

.dashboard-empty-state::after,
.empty-history::after,
.learning-empty-state::after {
    content: "";
    position: absolute;
    right: -54px;
    bottom: -70px;
    width: 170px;
    height: 170px;
    border: 28px solid rgba(49, 87, 213, 0.06);
    border-radius: 50%;
}

.exhibition-mode .exhibition-header,
.exhibition-mode .welcome-card,
.exhibition-mode .study-form,
.exhibition-mode .dashboard-topbar,
.exhibition-mode .tutor-header,
.exhibition-mode .quiz-box,
.exhibition-mode .performance-summary-card {
    border-color: rgba(49, 87, 213, 0.24);
}

.exhibition-toolbar {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 3000;
    display: flex;
    align-items: center;
    gap: 12px;
    max-width: min(430px, calc(100vw - 36px));
    padding: 12px;
    border: 1px solid rgba(49, 87, 213, 0.2);
    border-radius: var(--radius-lg);
    background: rgba(255, 253, 248, 0.94);
    box-shadow: 0 18px 44px rgba(30, 40, 58, 0.18);
    backdrop-filter: blur(16px);
}

.exhibition-toolbar div {
    display: grid;
    gap: 2px;
}

.exhibition-toolbar strong {
    color: var(--ink);
    font-size: 0.92rem;
}

.exhibition-toolbar span {
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.exhibition-toolbar form {
    display: inline-flex;
}

.exhibition-toolbar button {
    min-height: 40px;
    padding: 8px 12px;
    white-space: nowrap;
}

.exhibition-welcome-screen,
.exhibition-demo-panel {
    position: relative;
    overflow: hidden;
    margin-top: 22px;
    padding: clamp(22px, 4vw, 38px);
    border: 1px solid rgba(49, 87, 213, 0.18);
    border-radius: var(--card-radius);
    background:
        linear-gradient(135deg, rgba(49, 87, 213, 0.11), rgba(4, 125, 135, 0.08) 46%, rgba(189, 138, 32, 0.08)),
        rgba(255, 253, 248, 0.96);
    box-shadow: var(--soft-shadow);
}

.exhibition-welcome-screen {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
}

.exhibition-welcome-screen::before,
.exhibition-demo-panel::before,
.exhibition-flow-ribbon::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        linear-gradient(120deg, rgba(255, 255, 255, 0.36), transparent 34%),
        radial-gradient(circle at 92% 10%, rgba(49, 87, 213, 0.13), transparent 28%);
}

.exhibition-welcome-screen > *,
.exhibition-demo-panel > *,
.exhibition-flow-ribbon > * {
    position: relative;
    z-index: 1;
}

.exhibition-welcome-screen h2 {
    max-width: 720px;
    margin-bottom: 10px;
    font-size: clamp(2rem, 4vw, 4rem);
    line-height: 1;
}

.exhibition-welcome-screen p {
    max-width: 760px;
    margin-bottom: 0;
    color: #445064;
    font-size: clamp(1rem, 1.5vw, 1.2rem);
    font-weight: 800;
}

.exhibition-welcome-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 10px;
    flex: 0 0 auto;
}

.exhibition-demo-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.exhibition-demo-grid button {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 10px;
    align-items: center;
    min-height: 104px;
    padding: 16px;
    border: 1px solid rgba(49, 87, 213, 0.15);
    color: var(--ink);
    background: rgba(255, 255, 255, 0.72);
    box-shadow: var(--soft-shadow);
    text-align: left;
}

.exhibition-demo-grid button > span {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-lg);
    color: #ffffff;
    background: var(--primary);
    font-weight: 900;
}

.exhibition-demo-grid button:nth-child(2) > span {
    background: var(--teal);
}

.exhibition-demo-grid button:nth-child(3) > span {
    background: var(--amber);
}

.exhibition-demo-grid strong,
.exhibition-demo-grid small {
    display: block;
}

.exhibition-demo-grid small {
    margin-top: 4px;
    color: var(--muted);
    font-weight: 800;
}

.study-form.demo-ready {
    border-color: rgba(31, 122, 77, 0.34);
    box-shadow:
        0 0 0 4px rgba(31, 122, 77, 0.1),
        var(--lift-shadow);
}

.exhibition-mode .exhibition-feature-highlight {
    outline: 1px solid rgba(49, 87, 213, 0.16);
    outline-offset: -5px;
}

.exhibition-flow-ribbon {
    position: relative;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 10px;
    margin-bottom: 18px;
    padding: 12px;
    border: 1px solid rgba(49, 87, 213, 0.16);
    border-radius: var(--card-radius);
    background: rgba(255, 253, 248, 0.94);
    box-shadow: var(--soft-shadow);
    overflow: hidden;
}

.exhibition-flow-ribbon a {
    display: grid;
    grid-template-columns: 32px minmax(0, 1fr);
    gap: 8px;
    align-items: center;
    min-height: 48px;
    padding: 8px 10px;
    border: 1px solid transparent;
    border-radius: var(--radius-lg);
    color: var(--muted);
    text-decoration: none;
    background: rgba(49, 87, 213, 0.05);
}

.exhibition-flow-ribbon span {
    display: grid;
    place-items: center;
    width: 32px;
    height: 32px;
    border-radius: 999px;
    color: var(--primary);
    background: rgba(49, 87, 213, 0.12);
    font-weight: 900;
}

.exhibition-flow-ribbon strong {
    color: inherit;
    overflow-wrap: anywhere;
}

.exhibition-flow-ribbon a.active {
    color: var(--ink);
    border-color: rgba(49, 87, 213, 0.24);
    background: rgba(49, 87, 213, 0.11);
    box-shadow: 0 10px 22px rgba(49, 87, 213, 0.12);
}

.exhibition-flow-ribbon a.active span {
    color: #ffffff;
    background: var(--primary);
}

.exhibition-tour-backdrop {
    position: fixed;
    inset: 0;
    z-index: 3100;
    display: grid;
    place-items: center;
    padding: 18px;
    background: rgba(16, 20, 31, 0.42);
    backdrop-filter: blur(8px);
}

.exhibition-tour-backdrop[hidden] {
    display: none;
}

.exhibition-tour-card {
    width: min(520px, 100%);
    padding: clamp(22px, 4vw, 34px);
    border: 1px solid rgba(231, 223, 210, 0.94);
    border-radius: var(--card-radius);
    background: rgba(255, 253, 248, 0.98);
    box-shadow: 0 28px 72px rgba(16, 20, 31, 0.24);
}

.exhibition-tour-card h2 {
    margin-bottom: 10px;
}

.exhibition-tour-card p {
    margin-bottom: 18px;
    font-weight: 800;
}

.exhibition-tour-progress {
    height: 9px;
    overflow: hidden;
    margin-bottom: 18px;
    border-radius: 999px;
    background: rgba(49, 87, 213, 0.11);
}

.exhibition-tour-progress span {
    display: block;
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--primary), var(--teal));
    transition: width 0.28s var(--ease-premium);
}

.exhibition-tour-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.tour-highlight {
    position: relative;
    z-index: 2;
    box-shadow:
        0 0 0 4px rgba(49, 87, 213, 0.16),
        var(--lift-shadow) !important;
}

.history-table-wrap,
.performance-table-wrap,
.developer-table-wrap {
    max-width: 100%;
    overscroll-behavior-x: contain;
}

.history-table th {
    position: sticky;
    top: 0;
    z-index: 2;
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 var(--line);
}

.history-table tbody tr:hover {
    background: rgba(49, 87, 213, 0.055);
}

.history-table td:first-child,
.history-table th:first-child {
    padding-left: 20px;
}

.developer-users-table {
    min-width: 1180px;
}

.developer-users-results.is-loading,
.tutor-composer.is-sending {
    opacity: 0.72;
    pointer-events: none;
}

.developer-users-results.is-loading {
    position: relative;
}

.developer-users-results.is-loading::after {
    content: "Updating users...";
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 8px 12px;
    border: 1px solid rgba(49, 87, 213, 0.18);
    border-radius: 999px;
    color: var(--primary);
    background: rgba(255, 253, 248, 0.94);
    box-shadow: var(--soft-shadow);
    font-size: 0.82rem;
    font-weight: 900;
}

.developer-users-results.is-loading::before {
    content: "";
    position: absolute;
    left: 14px;
    right: 14px;
    top: 58px;
    height: 74px;
    border-radius: var(--radius-lg);
    background:
        linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.65), transparent),
        repeating-linear-gradient(
            180deg,
            rgba(49, 87, 213, 0.1) 0,
            rgba(49, 87, 213, 0.1) 12px,
            transparent 12px,
            transparent 24px
        );
    background-size: 220% 100%, 100% 100%;
    animation: skeletonShimmer 1.25s var(--ease-premium) infinite;
    pointer-events: none;
}

.tutor-chat-panel {
    grid-template-rows: minmax(470px, calc(100vh - 360px)) auto;
}

.tutor-messages::-webkit-scrollbar,
.profile-dropdown::-webkit-scrollbar,
.student-sidebar::-webkit-scrollbar,
.history-table-wrap::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

.tutor-messages::-webkit-scrollbar-thumb,
.profile-dropdown::-webkit-scrollbar-thumb,
.student-sidebar::-webkit-scrollbar-thumb,
.history-table-wrap::-webkit-scrollbar-thumb {
    border: 3px solid transparent;
    border-radius: 999px;
    background: rgba(49, 87, 213, 0.28);
    background-clip: padding-box;
}

.tutor-message-row {
    animation: messageIn 0.3s var(--ease-premium) both;
}

.tutor-message {
    border-radius: var(--radius-lg) var(--radius-lg) var(--radius-lg) var(--space-2);
}

.student .tutor-message {
    border-radius: var(--radius-lg) var(--radius-lg) var(--space-2) var(--radius-lg);
    background: linear-gradient(135deg, var(--primary), #4d76f5);
}

.assistant .tutor-message {
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.94), rgba(255, 253, 248, 0.98)),
        #ffffff;
}

.tutor-avatar {
    box-shadow:
        0 0 0 4px rgba(4, 125, 135, 0.08),
        var(--soft-shadow);
}

.tutor-quiz-cta {
    margin-top: 16px;
    padding: 14px;
    border: 1px solid rgba(4, 125, 135, 0.18);
    border-radius: var(--card-radius);
    background: rgba(4, 125, 135, 0.06);
}

.typing-row .tutor-message {
    min-width: 104px;
}

.tutor-composer {
    background:
        linear-gradient(180deg, rgba(255, 253, 248, 0.86), rgba(255, 253, 248, 0.98));
}

.tutor-composer.is-sending #tutor-send {
    color: transparent;
}

.tutor-composer.is-sending #tutor-send::before {
    content: "";
    position: absolute;
    width: 18px;
    height: 18px;
    border: 3px solid rgba(255, 255, 255, 0.46);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: spin 0.75s linear infinite;
}

.quiz-box {
    border-left: 0;
    background:
        linear-gradient(145deg, rgba(4, 125, 135, 0.08), rgba(255, 253, 248, 0.94) 34%),
        rgba(255, 253, 248, 0.95);
}

.quiz-question {
    margin: 18px 0;
    padding: clamp(16px, 2.5vw, 22px);
    border: 1px solid rgba(49, 87, 213, 0.12);
    border-radius: var(--card-radius);
    background: rgba(255, 255, 255, 0.62);
}

.quiz-question label strong {
    display: block;
}

.quiz-question:focus-within {
    border-color: rgba(49, 87, 213, 0.32);
    box-shadow:
        var(--focus-ring),
        var(--soft-shadow);
    transform: translateY(-2px);
}

.performance-summary-card {
    position: relative;
    overflow: hidden;
    box-shadow: 0 22px 54px rgba(49, 87, 213, 0.22);
}

.performance-summary-grid div,
.subject-analysis-grid article,
.insight-card {
    transition: transform 0.22s var(--ease-premium), box-shadow 0.22s var(--ease-premium);
}

.performance-summary-grid div:hover,
.subject-analysis-grid article:hover,
.insight-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 18px 38px rgba(30, 40, 58, 0.12);
}

.performance-chart-card {
    display: grid;
    align-content: start;
}

.performance-chart-card canvas {
    padding: 8px;
    border-radius: var(--card-radius);
    background: rgba(255, 255, 255, 0.5);
}

.rbac-status-list div,
.rbac-table-grid article,
.developer-detail-grid article {
    background:
        linear-gradient(145deg, rgba(49, 87, 213, 0.06), rgba(255, 253, 248, 0.88)),
        rgba(255, 253, 248, 0.86);
}

.developer-filter-form {
    padding: 16px;
    border: 1px solid rgba(49, 87, 213, 0.12);
    border-radius: var(--card-radius);
    background: rgba(49, 87, 213, 0.045);
}

.developer-results-summary {
    padding: 12px 14px;
    border: 1px solid rgba(49, 87, 213, 0.12);
    border-radius: var(--card-radius);
    background: rgba(49, 87, 213, 0.05);
}

@keyframes messageIn {
    from {
        opacity: 0;
        transform: translateY(8px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes sidebarSettle {
    from {
        opacity: 0;
        transform: translate3d(-10px, 0, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

@keyframes scoreSettle {
    0% {
        transform: translate3d(0, 8px, 0) scale(0.985);
    }
    68% {
        transform: translate3d(0, -1px, 0) scale(1.005);
    }
    100% {
        transform: translate3d(0, 0, 0) scale(1);
    }
}

html.dark-mode,
.dark-mode {
    --color-primary: #86a1ff;
    --color-primary-hover: #a0b4ff;
    --color-primary-soft: rgba(134, 161, 255, 0.12);
    --color-secondary: #5ccbd3;
    --color-secondary-hover: #7edbe1;
    --color-secondary-soft: rgba(92, 203, 211, 0.1);
    --color-success: #6ed59b;
    --color-success-soft: rgba(110, 213, 155, 0.14);
    --color-warning: #f0b35f;
    --color-warning-soft: rgba(240, 179, 95, 0.14);
    --color-danger: #ff9d84;
    --color-danger-soft: rgba(255, 157, 132, 0.14);
    --color-info: #93c5fd;
    --color-info-soft: rgba(147, 197, 253, 0.14);
    --color-background: #10141f;
    --color-surface: #151b29;
    --color-surface-strong: #1c2435;
    --color-border: #2b3548;
    --color-text: #f6f8fb;
    --color-text-muted: #b8c0cf;
    --shadow-sm: 0 6px 18px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.24);
    --shadow-lg: 0 18px 45px rgba(0, 0, 0, 0.34);
    --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.42);
    --bg: var(--color-background);
    --surface: var(--color-surface);
    --surface-strong: var(--color-surface-strong);
    --ink: var(--color-text);
    --muted: var(--color-text-muted);
    --line: var(--color-border);
    --primary: var(--color-primary);
    --primary-dark: var(--color-primary-hover);
    --teal: var(--color-secondary);
    --coral: var(--color-danger);
    --amber: var(--color-warning);
    --gold: #ffd166;
    --green: var(--color-success);
    --shadow: var(--shadow-lg);
    --soft-shadow: var(--shadow-md);
    --lift-shadow: var(--shadow-xl);
    background:
        linear-gradient(180deg, rgba(16, 20, 31, 0.98), rgba(20, 25, 37, 0.98)),
        #10141f;
}

html.dark-mode body {
    background:
        linear-gradient(180deg, rgba(16, 20, 31, 0.98), rgba(20, 25, 37, 0.98)),
        #10141f;
}

body.dark-mode::before,
html.dark-mode body::before {
    opacity: 0.18;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
}

.dark-mode .bg-illustration {
    opacity: 0.09;
    filter:
        brightness(1.18)
        drop-shadow(0 18px 28px rgba(0, 0, 0, 0.16));
}

.dark-mode .exhibition-header,
.dark-mode .welcome-card,
.dark-mode .hero-feature-badges span,
.dark-mode .hero-tagline,
.dark-mode .platform-highlights-card,
.dark-mode .mode-banner,
.dark-mode .account-motivation-card,
.dark-mode .guest-locked-card,
.dark-mode .locked-modal,
.dark-mode .project-team-card,
.dark-mode .about-card,
.dark-mode footer,
.dark-mode .hero,
.dark-mode .learn-container,
.dark-mode .lesson-preview,
.dark-mode .study-form,
.dark-mode .feature-card,
.dark-mode .why-study-grid article,
.dark-mode .flash-message,
.dark-mode .profile-menu-button,
.dark-mode .profile-dropdown,
.dark-mode .profile-card,
.dark-mode .profile-future-card,
.dark-mode .settings-section-nav,
.dark-mode .settings-switch,
.dark-mode .delete-account-form,
.dark-mode .student-sidebar,
.dark-mode .dashboard-topbar,
.dark-mode .dashboard-panel,
.dark-mode .dashboard-stat-card,
.dark-mode .student-identity-card,
.dark-mode .activity-card,
.dark-mode .performance-summary-grid div,
.dark-mode .performance-chart-card,
.dark-mode .subject-analysis-grid article,
.dark-mode .insight-card,
.dark-mode .history-tools,
.dark-mode .learning-history-card,
.dark-mode .learning-locked-panel,
.dark-mode .saved-quiz-card,
.dark-mode .achievement-badge,
.dark-mode .recommended-topic-card,
.dark-mode .locked-dashboard-card,
.dark-mode .rbac-status-list div,
.dark-mode .rbac-table-grid article,
.dark-mode .rbac-tool-card,
.dark-mode .developer-detail-grid article,
.dark-mode .score-card,
.dark-mode .recommendation-card,
.dark-mode .card,
.dark-mode .quiz-box,
.dark-mode .diagram-card,
.dark-mode .continue-learning-section,
.dark-mode .learning-action-card,
.dark-mode .tutor-header,
.dark-mode .tutor-chat-panel,
.dark-mode .tutor-lesson-strip span,
.dark-mode .tutor-message,
.dark-mode .tutor-composer {
    background: rgba(21, 27, 41, 0.94);
    border-color: var(--line);
}

.dark-mode .school-mark,
.dark-mode .guest-badge,
.dark-mode .verified-badge,
.dark-mode .role-badge,
.dark-mode .footer-grid div,
.dark-mode .tech-badges span,
.dark-mode .overview-panel,
.dark-mode .team-member {
    background: rgba(134, 161, 255, 0.1);
    border-color: rgba(134, 161, 255, 0.18);
}

.dark-mode .subtitle,
.dark-mode .hero-tagline,
.dark-mode .welcome-card p,
.dark-mode .welcome-subtitle,
.dark-mode .about-card p {
    color: var(--muted);
}

.dark-mode .tech-badges span {
    color: var(--primary);
}

.dark-mode .secondary-auth-link {
    background: rgba(134, 161, 255, 0.1);
    border-color: rgba(134, 161, 255, 0.18);
}

.dark-mode .role-developer,
.dark-mode span.role-developer {
    color: #b9c8ff;
    background: rgba(134, 161, 255, 0.16);
}

.dark-mode .role-technical-support,
.dark-mode span.role-technical-support {
    color: #dbc2ff;
    background: rgba(163, 104, 255, 0.16);
}

.dark-mode .role-qa-tester,
.dark-mode span.role-qa-tester {
    color: #a8efc4;
    background: rgba(31, 122, 77, 0.2);
}

.dark-mode .role-student,
.dark-mode span.role-student {
    color: #d7dce6;
    background: rgba(184, 192, 207, 0.12);
}

.dark-mode .profile-menu-button:hover,
.dark-mode .profile-dropdown a:hover,
.dark-mode .profile-dropdown a:focus-visible,
.dark-mode .sidebar-nav a:hover,
.dark-mode .sidebar-nav a.active,
.dark-mode .quick-actions-grid a:hover {
    background: rgba(134, 161, 255, 0.12);
}

.dark-mode .exhibition-badge {
    color: #ffe9b0;
    background: linear-gradient(135deg, rgba(169, 109, 19, 0.2), rgba(134, 161, 255, 0.12));
    border-color: rgba(240, 179, 95, 0.28);
}

.dark-mode .subject-hints span,
.dark-mode .lesson-info-strip span,
.dark-mode .feature-list li,
.dark-mode .highlight-chip-grid span,
.dark-mode .quick-actions-grid a,
.dark-mode .dashboard-empty-state,
.dark-mode .developer-results-summary,
.dark-mode .locked-feature-grid button,
.dark-mode .history-table-wrap,
.dark-mode .history-table th,
.dark-mode .empty-history,
.dark-mode #loader-message,
.dark-mode .loader-steps p {
    background: rgba(134, 161, 255, 0.1);
    border-color: rgba(134, 161, 255, 0.18);
}

.dark-mode input,
.dark-mode select,
.dark-mode textarea,
.dark-mode .diagram-image {
    color: var(--ink);
    background: #111827;
    border-color: var(--line);
}

.dark-mode .autocomplete-menu {
    background: rgba(17, 24, 39, 0.98);
    border-color: var(--line);
    box-shadow: 0 18px 42px rgba(0, 0, 0, 0.36);
}

.dark-mode .autocomplete-option {
    color: var(--ink);
}

.dark-mode .autocomplete-option-icon,
.dark-mode .autocomplete-chapter-count,
.dark-mode .autocomplete-empty-icon {
    background: rgba(134, 161, 255, 0.14);
}

.dark-mode .autocomplete-option-content small,
.dark-mode .autocomplete-section-label,
.dark-mode .autocomplete-empty-state small {
    color: var(--muted);
}

.dark-mode .autocomplete-option mark,
.dark-mode .popular-chapter-button mark {
    color: #d7e0ff;
    background: rgba(134, 161, 255, 0.2);
}

.dark-mode .autocomplete-option:hover,
.dark-mode .autocomplete-option[aria-selected="true"] {
    color: #b9c8ff;
    background: rgba(134, 161, 255, 0.12);
    border-color: rgba(134, 161, 255, 0.26);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
}

.dark-mode .autocomplete-ai-badge {
    color: #dbc2ff;
    background: rgba(163, 104, 255, 0.18);
}

.dark-mode .autocomplete-status {
    color: #f7c873;
}

.dark-mode .autocomplete-inline-empty,
.dark-mode .autocomplete-empty-state,
.dark-mode .autocomplete-skeleton,
.dark-mode .chapter-card-skeleton {
    color: var(--ink);
    background: rgba(134, 161, 255, 0.1);
    border-color: rgba(134, 161, 255, 0.16);
}

.dark-mode .autocomplete-skeleton span,
.dark-mode .chapter-card-skeleton span {
    background: linear-gradient(90deg, rgba(134, 161, 255, 0.1), rgba(134, 161, 255, 0.28), rgba(134, 161, 255, 0.1));
    background-size: 220% 100%;
}

.dark-mode .selection-info-card,
.dark-mode .popular-chapters-panel {
    background:
        linear-gradient(145deg, rgba(17, 24, 39, 0.92), rgba(22, 32, 52, 0.96)),
        rgba(134, 161, 255, 0.1);
    border-color: rgba(134, 161, 255, 0.18);
}

.dark-mode .textbook-info-card .selection-metadata-grid div {
    background: rgba(17, 24, 39, 0.72);
}

.dark-mode .selection-card-title,
.dark-mode .selection-info-card dd,
.dark-mode .popular-chapters-heading {
    color: var(--ink);
}

.dark-mode .selection-status-ready {
    color: #7ee2a8 !important;
}

.dark-mode .selection-status-badge {
    border-color: rgba(126, 226, 168, 0.26);
    background: rgba(126, 226, 168, 0.12);
}

.dark-mode .popular-chapter-button {
    color: var(--ink);
    background: rgba(17, 24, 39, 0.72);
    border-color: var(--line);
}

.dark-mode .popular-chapter-button:hover,
.dark-mode .popular-chapter-button:focus-visible {
    color: #b9c8ff;
    background: rgba(134, 161, 255, 0.12);
}

.dark-mode .popular-chapter-button.is-selected {
    color: #ffffff;
    border-color: rgba(134, 161, 255, 0.58);
    background: #3157d5;
}

.dark-mode .diagram-data-list span {
    background: rgba(96, 165, 250, 0.14);
    border-color: rgba(96, 165, 250, 0.24);
}

.dark-mode .diagram-unavailable {
    background: rgba(17, 24, 39, 0.72);
    border-color: var(--line);
}

.dark-mode p,
.dark-mode .content,
.dark-mode .content p,
.dark-mode .quiz-question label {
    color: var(--muted);
}

.dark-mode .feature-card h3,
.dark-mode .why-study-grid h3,
.dark-mode .dashboard-stat-card strong,
.dark-mode .activity-card strong,
.dark-mode .performance-summary-grid strong,
.dark-mode .performance-chart-card h3,
.dark-mode .subject-analysis-grid strong,
.dark-mode .developer-detail-grid strong,
.dark-mode .saved-quiz-card li,
.dark-mode .achievement-badge strong,
.dark-mode .recommended-topic-card h3,
.dark-mode .score-card h3,
.dark-mode .card h3,
.dark-mode .recommendation-card h3,
.dark-mode .evaluation-card-header h3,
.dark-mode .question-text,
.dark-mode .teacher-report-overview h3,
.dark-mode .teacher-report-card h3 {
    color: var(--ink);
}

.dark-mode .recommendation-reason {
    background: rgba(96, 165, 250, 0.18);
    color: #bfdbfe;
}

.dark-mode .feature-card:hover,
.dark-mode .team-member:hover,
.dark-mode .why-study-grid article:hover,
.dark-mode .highlight-chip-grid span:hover {
    background: rgba(134, 161, 255, 0.12);
}

.dark-mode .reading-progress {
    background: rgba(134, 161, 255, 0.1);
}

.dark-mode .lesson-navigator,
.dark-mode .lesson-hero,
.dark-mode .lesson-callout {
    background: rgba(21, 27, 41, 0.94);
    border-color: rgba(134, 161, 255, 0.18);
}

.dark-mode .lesson-navigator a {
    color: var(--muted);
}

.dark-mode .lesson-navigator a:hover,
.dark-mode .lesson-navigator a:focus-visible,
.dark-mode .lesson-navigator a.is-active {
    color: var(--primary);
    background: rgba(134, 161, 255, 0.12);
    border-color: rgba(134, 161, 255, 0.2);
}

.dark-mode.learn-page .lesson-info-strip span,
.dark-mode .content blockquote {
    background: rgba(134, 161, 255, 0.1);
    border-color: rgba(134, 161, 255, 0.18);
}

.dark-mode .lesson-callout-definition {
    background: rgba(134, 161, 255, 0.1);
}

.dark-mode .lesson-callout-remember {
    background: rgba(31, 122, 77, 0.14);
}

.dark-mode .lesson-callout-important {
    background: rgba(169, 109, 19, 0.14);
}

.dark-mode .lesson-callout-example {
    background: rgba(126, 63, 196, 0.14);
}

.dark-mode .achievement-card {
    background: #273149;
    border-color: #35415b;
}

.dark-mode .tip-box {
    color: #ffe1ad;
    background: rgba(240, 179, 95, 0.12);
}

.dark-mode .password-reset-summary {
    background: rgba(31, 122, 77, 0.12);
}

.dark-mode .password-reset-summary strong {
    color: var(--ink);
}

.dark-mode .evaluation-card,
.dark-mode .answer-grid div,
.dark-mode .feedback-box,
.dark-mode .revision-tip,
.dark-mode .teacher-report-overview,
.dark-mode .teacher-report-card {
    background: rgba(20, 27, 42, 0.86);
}

.dark-mode .evaluation-card.correct {
    background: linear-gradient(135deg, rgba(47, 159, 103, 0.16), rgba(20, 27, 42, 0.9));
}

.dark-mode .evaluation-card.incorrect {
    background: linear-gradient(135deg, rgba(217, 72, 72, 0.16), rgba(20, 27, 42, 0.9));
}

.dark-mode .evaluation-card.partial {
    background: linear-gradient(135deg, rgba(240, 179, 95, 0.16), rgba(20, 27, 42, 0.9));
}

.dark-mode .marks-row {
    background: rgba(134, 161, 255, 0.11);
}

.dark-mode .page-transition-overlay {
    background:
        linear-gradient(180deg, rgba(16, 20, 31, 0.9), rgba(20, 25, 37, 0.96)),
        rgba(16, 20, 31, 0.94);
}

.dark-mode .page-transition-card {
    background:
        linear-gradient(145deg, rgba(28, 36, 53, 0.96), rgba(21, 27, 41, 0.98)),
        var(--surface);
    border-color: rgba(134, 161, 255, 0.2);
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.42);
}

.dark-mode .page-transition-logo {
    color: #10141f;
    background: linear-gradient(135deg, var(--primary), var(--teal));
}

.dark-mode .page-transition-spinner {
    border-color: rgba(134, 161, 255, 0.18);
    border-top-color: var(--primary);
    border-right-color: var(--teal);
}

.dark-mode .page-transition-overlay p {
    color: var(--ink);
    background: rgba(134, 161, 255, 0.1);
    border-color: rgba(134, 161, 255, 0.18);
}

.exhibition-mode .page-transition-card {
    border-color: rgba(189, 138, 32, 0.28);
    box-shadow: 0 26px 76px rgba(49, 87, 213, 0.2);
}

.exhibition-mode .page-transition-logo {
    background: linear-gradient(135deg, var(--gold), var(--primary));
}

.dark-mode #loader {
    background: rgba(16, 20, 31, 0.94);
}

.dark-mode .loader-icons span {
    background: rgba(134, 161, 255, 0.1);
    border-color: rgba(134, 161, 255, 0.18);
}

.dark-mode .continue-learning-heading p,
.dark-mode .learning-card-copy p,
.dark-mode .learning-card-copy span,
.dark-mode .tutor-header p,
.dark-mode .tutor-message-content,
.dark-mode .tutor-composer p {
    color: var(--muted);
}

.dark-mode .continue-learning-section {
    background:
        linear-gradient(135deg, rgba(134, 161, 255, 0.12), rgba(92, 203, 211, 0.1) 46%, rgba(240, 179, 95, 0.08)),
        rgba(21, 27, 41, 0.94);
}

.dark-mode .revision-tools-section,
.dark-mode .flashcards-header,
.dark-mode .flashcard-success-banner,
.dark-mode .flashcard-study-panel,
.dark-mode .memory-command-panel,
.dark-mode .memory-stats-grid article,
.dark-mode .memory-hud article,
.dark-mode .memory-empty-state,
.dark-mode .memory-completion-modal,
.dark-mode .revision-command-bar,
.dark-mode .revision-section-nav,
.dark-mode .revision-sheet-card,
.dark-mode .study-plan-preview-section,
.dark-mode .study-plan-card,
.dark-mode .mindmap-toolbar,
.dark-mode .mindmap-stage {
    background:
        linear-gradient(145deg, rgba(32, 40, 58, 0.78), rgba(21, 27, 41, 0.96)),
        rgba(21, 27, 41, 0.94);
    border-color: rgba(134, 161, 255, 0.18);
}

.dark-mode .continue-learning-section::before {
    background:
        linear-gradient(90deg, rgba(134, 161, 255, 0.08), transparent 35%),
        radial-gradient(circle at 86% 12%, rgba(92, 203, 211, 0.12), transparent 28%);
}

.dark-mode .revision-tools-section::before {
    background:
        linear-gradient(90deg, rgba(134, 161, 255, 0.08), transparent 35%),
        radial-gradient(circle at 86% 12%, rgba(31, 122, 77, 0.16), transparent 28%);
}

.dark-mode .learning-action-card {
    background:
        linear-gradient(180deg, rgba(32, 40, 58, 0.9), rgba(21, 27, 41, 0.98)),
        rgba(21, 27, 41, 0.94);
}

.dark-mode .study-plan-preview-card,
.dark-mode .study-plan-summary-card,
.dark-mode .study-plan-task,
.dark-mode .today-study-goal-meta span {
    background: rgba(17, 24, 39, 0.72);
    border-color: rgba(134, 161, 255, 0.18);
}

.dark-mode .study-plan-summary-card.completed,
.dark-mode .study-plan-task.completed {
    background: rgba(31, 122, 77, 0.16);
    border-color: rgba(74, 222, 128, 0.24);
}

.dark-mode .study-plan-preview-card strong,
.dark-mode .study-plan-task-copy strong,
.dark-mode .study-plan-summary-card strong {
    color: var(--ink);
}

.dark-mode .study-plan-preview-card span,
.dark-mode .study-plan-task-copy span,
.dark-mode .study-plan-summary-card span,
.dark-mode .today-study-goal-meta span {
    color: var(--muted);
}

.dark-mode .study-plan-progress-track {
    background: rgba(134, 161, 255, 0.16);
}

@media (hover: hover) and (pointer: fine) {
    .dark-mode .learning-action-card:hover {
        background:
            linear-gradient(180deg, rgba(39, 49, 73, 0.96), rgba(21, 27, 41, 0.99)),
            rgba(21, 27, 41, 0.96);
    }
}

.dark-mode .learning-card-copy h3,
.dark-mode .learning-card-copy strong {
    color: var(--ink);
}

.dark-mode .flashcards-header p,
.dark-mode .flashcard-success-banner p,
.dark-mode .memory-empty-state p,
.dark-mode .flashcard-keyboard-hint {
    color: var(--muted);
}

.dark-mode .flashcard-stage {
    color: var(--ink);
    background:
        radial-gradient(circle at 12% 10%, rgba(134, 161, 255, 0.13), transparent 32%),
        linear-gradient(145deg, rgba(32, 40, 58, 0.94), rgba(21, 27, 41, 0.98));
    border-color: rgba(134, 161, 255, 0.22);
}

.dark-mode .flashcard-stage.is-flipped {
    background:
        radial-gradient(circle at 88% 12%, rgba(92, 203, 211, 0.13), transparent 32%),
        linear-gradient(145deg, rgba(32, 40, 58, 0.94), rgba(21, 27, 41, 0.98));
}

.dark-mode .flashcard-text {
    color: var(--ink);
}

.dark-mode .memory-mode-switch a,
.dark-mode .memory-completion-grid article {
    color: var(--ink);
    background: rgba(17, 24, 39, 0.72);
    border-color: rgba(134, 161, 255, 0.18);
}

.dark-mode .memory-mode-switch a.active,
.dark-mode .memory-mode-switch a:hover {
    background: rgba(134, 161, 255, 0.14);
}

.dark-mode .memory-card-back {
    background:
        linear-gradient(135deg, rgba(134, 161, 255, 0.82), rgba(92, 203, 211, 0.72)),
        var(--surface-strong);
}

.dark-mode .memory-card-front {
    color: var(--ink);
    background:
        radial-gradient(circle at 12% 10%, rgba(240, 179, 95, 0.12), transparent 34%),
        linear-gradient(145deg, rgba(32, 40, 58, 0.96), rgba(21, 27, 41, 0.98));
}

.dark-mode .memory-card-front strong,
.dark-mode .memory-stats-grid strong,
.dark-mode .memory-hud strong,
.dark-mode .memory-completion-grid strong,
.dark-mode .memory-completion-modal h2 {
    color: var(--ink);
}

.dark-mode .memory-unlocks strong,
.dark-mode .memory-unlocks span {
    background: rgba(134, 161, 255, 0.14);
}

.dark-mode .memory-progress-track {
    background: rgba(134, 161, 255, 0.14);
}

.dark-mode .revision-section-nav span {
    color: var(--ink);
    background: rgba(17, 24, 39, 0.72);
}

.dark-mode .revision-sheet-content h1,
.dark-mode .revision-sheet-content h2 {
    color: var(--ink);
}

.dark-mode .revision-sheet-content p,
.dark-mode .revision-sheet-content li,
.dark-mode .revision-header p,
.dark-mode .mindmap-header p {
    color: var(--muted);
}

.dark-mode .important-questions-content th,
.dark-mode .important-questions-content td {
    border-color: rgba(134, 161, 255, 0.18);
}

.dark-mode .important-questions-content th {
    background: rgba(134, 161, 255, 0.1);
}

.dark-mode .mindmap-node {
    color: var(--ink);
    border-color: rgba(134, 161, 255, 0.22);
    background:
        linear-gradient(180deg, rgba(32, 40, 58, 0.94), rgba(21, 27, 41, 0.98)),
        rgba(21, 27, 41, 0.94);
    box-shadow: 0 14px 28px rgba(0, 0, 0, 0.22);
}

.dark-mode .mindmap-node-root {
    color: #ffffff;
    background:
        linear-gradient(135deg, #496ff0, #11959f 58%, #249061),
        #496ff0;
}

.dark-mode .mindmap-node[aria-expanded]::after {
    color: #ffffff;
    background: rgba(134, 161, 255, 0.22);
}

.dark-mode .mindmap-branches::before,
.dark-mode .mindmap-branch-item::before {
    background: rgba(134, 161, 255, 0.34);
}

.dark-mode .coming-soon-pill {
    color: #ffe1ad;
    border-color: rgba(240, 179, 95, 0.28);
    background: rgba(240, 179, 95, 0.12);
}

.dark-mode .student .tutor-message-content {
    color: #ffffff;
}

.dark-mode .student .tutor-message {
    color: #ffffff;
    background: var(--primary);
    border-color: rgba(134, 161, 255, 0.26);
}

.dark-mode .tutor-message-content th,
.dark-mode .tutor-quiz-cta strong,
.dark-mode .tutor-composer label {
    color: var(--ink);
}

.dark-mode .tutor-message-content pre {
    background: #0b1120;
}

.dark-mode .tutor-message-content code {
    background: rgba(134, 161, 255, 0.14);
}

.dark-mode .profile-gamification-card,
.dark-mode .daily-challenge-card,
.dark-mode .achievement-progress-card,
.dark-mode .xp-award-grid span,
.dark-mode .profile-gamification-grid article {
    border-color: rgba(134, 161, 255, 0.18);
    background: rgba(134, 161, 255, 0.08);
}

.dark-mode .daily-challenge-card.completed,
.dark-mode .achievement-progress-card.completed,
.dark-mode .profile-future-card.completed {
    border-color: rgba(92, 211, 153, 0.24);
    background: rgba(92, 211, 153, 0.1);
}

.dark-mode .xp-progress-track,
.dark-mode .challenge-progress-track {
    background: rgba(134, 161, 255, 0.13);
}

.dark-mode .dashboard-topbar,
.dark-mode .dashboard-panel,
.dark-mode .student-sidebar,
.dark-mode .tutor-header,
.dark-mode .tutor-chat-panel,
.dark-mode .learn-container,
.dark-mode .hero,
.dark-mode .study-form,
.dark-mode .profile-card,
.dark-mode .settings-section-nav,
.dark-mode .settings-switch,
.dark-mode .delete-account-form {
    background:
        linear-gradient(145deg, rgba(32, 40, 58, 0.78), rgba(21, 27, 41, 0.96)),
        rgba(21, 27, 41, 0.94);
}

.dark-mode .dashboard-topbar::before,
.dark-mode .tutor-header::before,
.dark-mode .hero::before,
.dark-mode .performance-summary-card::before {
    background:
        radial-gradient(circle at 12% 0%, rgba(134, 161, 255, 0.16), transparent 34%),
        radial-gradient(circle at 92% 12%, rgba(92, 203, 211, 0.12), transparent 30%);
}

.dark-mode .sidebar-brand,
.dark-mode .developer-filter-form,
.dark-mode .developer-results-summary,
.dark-mode .quiz-question,
.dark-mode .tutor-quiz-cta,
.dark-mode .tutor-starter-prompts button,
.dark-mode .tutor-suggestion-chips button,
.dark-mode .performance-chart-card canvas {
    background: rgba(134, 161, 255, 0.08);
    border-color: rgba(134, 161, 255, 0.16);
}

.dark-mode .copy-response-button,
.dark-mode .regenerate-response-button,
.dark-mode .tutor-voice-tools button {
    background: rgba(134, 161, 255, 0.1);
    border-color: rgba(134, 161, 255, 0.18);
}

.dark-mode #voice-status {
    color: var(--muted);
}

.dark-mode .assistant .tutor-message {
    background:
        linear-gradient(145deg, rgba(32, 40, 58, 0.94), rgba(21, 27, 41, 0.98)),
        rgba(21, 27, 41, 0.94);
}

.dark-mode .student .tutor-message {
    background: linear-gradient(135deg, #526eea, #7691ff);
}

.dark-mode .quick-actions-grid a,
.dark-mode .dashboard-empty-state,
.dark-mode .empty-history,
.dark-mode .learning-empty-state,
.dark-mode .rbac-status-list div,
.dark-mode .rbac-table-grid article,
.dark-mode .developer-detail-grid article {
    background:
        linear-gradient(145deg, rgba(134, 161, 255, 0.1), rgba(21, 27, 41, 0.86)),
        rgba(21, 27, 41, 0.94);
}

.dark-mode .dashboard-empty-state::before,
.dark-mode .empty-history::before,
.dark-mode .learning-empty-state::before,
.dark-mode .developer-users-results.is-loading::after {
    color: var(--primary);
    background: rgba(21, 27, 41, 0.94);
    border-color: rgba(134, 161, 255, 0.18);
}

.dark-mode .dashboard-quote-card {
    background:
        linear-gradient(135deg, rgba(82, 110, 234, 0.96), rgba(4, 125, 135, 0.88) 58%, rgba(31, 122, 77, 0.86)),
        #273149;
}

.dark-mode .dashboard-quote-card .eyebrow,
.dark-mode .dashboard-quote-card p,
.dark-mode .dashboard-quote-card cite {
    color: #ffffff;
}

.dark-mode .continue-dashboard-panel {
    background:
        linear-gradient(135deg, rgba(240, 179, 95, 0.12), rgba(134, 161, 255, 0.1), rgba(92, 203, 211, 0.1)),
        rgba(21, 27, 41, 0.94);
}

.dark-mode .recommendation-focus-card {
    background:
        linear-gradient(145deg, rgba(31, 122, 77, 0.14), rgba(240, 179, 95, 0.1)),
        rgba(21, 27, 41, 0.94);
}

.dark-mode .continue-dashboard-copy p,
.dark-mode .dashboard-progress-card p,
.dark-mode .weekly-summary-panel p,
.dark-mode .recommendation-focus-card p,
.dark-mode .tutor-preview-card p {
    color: var(--muted);
}

.dark-mode .learning-progress-track,
.dark-mode .weekly-summary-track,
.dark-mode .weekly-summary-grid span {
    background: rgba(134, 161, 255, 0.1);
    border-color: rgba(134, 161, 255, 0.18);
}

.dark-mode .weekly-summary-grid strong,
.dark-mode .tutor-preview-card strong {
    color: var(--ink);
}

.dark-mode .recent-progress-pill {
    color: var(--primary);
    background: rgba(134, 161, 255, 0.11);
    border-color: rgba(134, 161, 255, 0.2);
}

.dark-mode .recent-progress-pill.up {
    color: #a8efc4;
    background: rgba(31, 122, 77, 0.18);
    border-color: rgba(110, 213, 155, 0.22);
}

.dark-mode .recent-progress-pill.down {
    color: #ffc1b6;
    background: rgba(255, 157, 132, 0.14);
    border-color: rgba(255, 157, 132, 0.24);
}

.dark-mode .overall-progress-meter {
    background: rgba(134, 161, 255, 0.1);
    border-color: rgba(134, 161, 255, 0.18);
}

.dark-mode .exhibition-toolbar,
.dark-mode .exhibition-welcome-screen,
.dark-mode .exhibition-demo-panel,
.dark-mode .exhibition-flow-ribbon,
.dark-mode .exhibition-tour-card {
    background:
        linear-gradient(145deg, rgba(32, 40, 58, 0.82), rgba(21, 27, 41, 0.96)),
        rgba(21, 27, 41, 0.94);
    border-color: rgba(134, 161, 255, 0.18);
}

.dark-mode .exhibition-welcome-screen p,
.dark-mode .exhibition-demo-grid small,
.dark-mode .exhibition-tour-card p {
    color: var(--muted);
}

.dark-mode .exhibition-demo-grid button,
.dark-mode .exhibition-flow-ribbon a {
    color: var(--ink);
    background: rgba(134, 161, 255, 0.09);
    border-color: rgba(134, 161, 255, 0.14);
}

.dark-mode .exhibition-flow-ribbon a.active {
    background: rgba(134, 161, 255, 0.15);
    border-color: rgba(134, 161, 255, 0.24);
}

.dark-mode .exhibition-tour-progress {
    background: rgba(134, 161, 255, 0.12);
}

.dark-mode .history-table tbody tr:hover {
    background: rgba(134, 161, 255, 0.1);
}

.dark-mode .quiz-box {
    background:
        linear-gradient(145deg, rgba(92, 203, 211, 0.12), rgba(21, 27, 41, 0.94) 34%),
        rgba(21, 27, 41, 0.94);
}

.pwa-install-banner {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 260;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 16px;
    width: min(460px, calc(100vw - 36px));
    padding: 16px;
    border: 1px solid rgba(49, 87, 213, 0.2);
    border-radius: 8px;
    color: var(--ink);
    background: rgba(255, 253, 248, 0.96);
    box-shadow: 0 24px 55px rgba(30, 40, 58, 0.18);
    backdrop-filter: blur(16px);
}

.pwa-install-banner[hidden] {
    display: none;
}

.pwa-install-banner strong {
    display: block;
    margin-bottom: 4px;
    color: var(--ink);
    font-size: 1rem;
}

.pwa-install-banner span {
    display: block;
    color: var(--muted);
    font-size: 0.92rem;
    font-weight: 700;
    line-height: 1.45;
}

.pwa-install-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px;
}

.pwa-install-actions button {
    min-height: 42px;
    padding: 9px 13px;
    white-space: nowrap;
}

.dark-mode .pwa-install-banner {
    border-color: rgba(134, 161, 255, 0.2);
    background: rgba(21, 27, 41, 0.97);
    box-shadow: 0 24px 55px rgba(0, 0, 0, 0.28);
}

.dark-mode .pwa-install-banner span {
    color: var(--muted);
}

.dark-mode input:focus,
.dark-mode select:focus,
.dark-mode textarea:focus {
    box-shadow:
        0 0 0 4px rgba(134, 161, 255, 0.2),
        0 10px 24px rgba(0, 0, 0, 0.18);
}

.dark-mode .download-center-hero,
.dark-mode .download-report-card,
.dark-mode .download-empty-state,
.dark-mode .favourite-note-card,
.dark-mode .favourite-empty-state {
    border-color: rgba(134, 161, 255, 0.18);
    background:
        linear-gradient(135deg, rgba(134, 161, 255, 0.08), rgba(35, 183, 166, 0.07), rgba(255, 207, 117, 0.06)),
        rgba(21, 27, 41, 0.92);
}

.dark-mode .download-center-count,
.dark-mode .download-report-meta span,
.dark-mode .download-report-details div,
.dark-mode .favourite-note-meta div {
    border-color: rgba(134, 161, 255, 0.16);
    background: rgba(255, 255, 255, 0.05);
}

.dark-mode .download-center-hero p,
.dark-mode .download-center-count span,
.dark-mode .download-report-meta span,
.dark-mode .download-report-details dt,
.dark-mode .download-empty-state p,
.dark-mode .favourite-note-meta dt,
.dark-mode .favourite-empty-state p {
    color: var(--muted);
}

.dark-mode .download-report-details dd,
.dark-mode .favourite-note-meta dd {
    color: var(--ink);
}

.dark-mode .favourite-toggle.is-active {
    color: #ffcf75;
    border-color: rgba(255, 207, 117, 0.28);
    background: rgba(255, 207, 117, 0.12);
}

/* Final design-system consistency layer */
body {
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
}

h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--ink);
    line-height: var(--line-height-tight);
    letter-spacing: 0;
}

h1,
h2,
.dashboard-section-heading h2,
.section-heading h2 {
    font-weight: var(--font-weight-strong);
}

h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
}

p,
li,
dd,
td {
    line-height: var(--line-height-base);
}

p + p {
    margin-top: var(--space-3);
}

:where(
    .exhibition-header,
    .welcome-card,
    .feature-showcase-section,
    .platform-highlights-card,
    .why-study-card,
    .account-motivation-card,
    .guest-locked-card,
    .project-team-card,
    .about-card,
    .learn-container,
    .hero,
    .study-form,
    .feature-card,
    .card,
    .quiz-box,
    .tip-box,
    .diagram-card,
    .profile-card,
    .profile-future-card,
    .settings-section-nav,
    .settings-switch,
    .delete-account-form,
    .student-sidebar,
    .dashboard-topbar,
    .dashboard-panel,
    .dashboard-stat-card,
    .activity-card,
    .performance-summary-card,
    .performance-summary-grid div,
    .performance-chart-card,
    .subject-analysis-grid article,
    .insight-card,
    .history-tools,
    .history-table-wrap,
    .learning-history-card,
    .learning-locked-panel,
    .saved-quiz-card,
    .achievement-badge,
    .recommended-topic-card,
    .locked-dashboard-card,
    .rbac-status-list div,
    .rbac-table-grid article,
    .rbac-tool-card,
    .developer-detail-grid article,
    .score-card,
    .recommendation-card,
    .evaluation-card,
    .answer-grid div,
    .feedback-box,
    .revision-tip,
    .teacher-report-overview,
    .teacher-report-card,
    .continue-learning-section,
    .learning-action-card,
    .revision-tools-section,
    .flashcards-header,
    .flashcard-success-banner,
    .flashcard-study-panel,
    .memory-command-panel,
    .memory-stats-grid article,
    .memory-hud article,
    .memory-empty-state,
    .memory-completion-modal,
    .revision-command-bar,
    .revision-section-nav,
    .revision-sheet-card,
    .study-plan-preview-section,
    .study-plan-card,
    .study-plan-preview-card,
    .study-plan-summary-card,
    .study-plan-task,
    .mindmap-toolbar,
    .mindmap-stage,
    .tutor-header,
    .tutor-chat-panel,
    .tutor-lesson-strip span,
    .tutor-message,
    .tutor-composer,
    .locked-modal,
    .page-transition-card,
    .pwa-install-banner,
    .exhibition-toolbar,
    .exhibition-welcome-screen,
    .exhibition-demo-panel,
    .exhibition-flow-ribbon,
    .exhibition-tour-card
) {
    border-radius: var(--card-radius);
    border-color: var(--line);
}

:where(
    .dashboard-panel,
    .dashboard-stat-card,
    .activity-card,
    .performance-chart-card,
    .insight-card,
    .history-table-wrap,
    .learning-history-card,
    .learning-action-card,
    .feature-card,
    .platform-highlights-card,
    .score-card,
    .card,
    .recommendation-card,
    .evaluation-card,
    .teacher-report-card,
    .saved-quiz-card,
    .flashcard-study-panel,
    .memory-command-panel,
    .revision-sheet-card,
    .study-plan-card,
    .mindmap-stage,
    .tutor-chat-panel
) {
    box-shadow: var(--soft-shadow);
}

:where(.dashboard-section-heading, .section-heading, .compact-heading) {
    gap: var(--space-4);
    margin-bottom: var(--space-5);
    padding-bottom: var(--space-4);
}

:where(.dashboard-section-heading h2, .section-heading h2, .compact-heading h2),
:where(.dashboard-section-heading p, .section-heading p, .compact-heading p) {
    margin-bottom: 0;
}

:where(
    .dashboard-stat-grid,
    .dashboard-hero-grid,
    .dashboard-insight-grid,
    .dashboard-content-grid,
    .quick-actions-grid,
    .performance-stat-grid,
    .performance-summary-grid,
    .performance-chart-grid,
    .subject-analysis-grid,
    .achievement-badge-grid,
    .recommended-topic-grid,
    .continue-learning-grid,
    .revision-tool-grid,
    .study-plan-summary-grid,
    .profile-gamification-grid,
    .daily-challenge-grid,
    .achievement-progress-grid,
    .learning-history-grid,
    .rbac-stat-grid,
    .rbac-tool-grid,
    .rbac-table-grid,
    .developer-detail-grid,
    .evaluation-summary-grid,
    .teacher-report-grid,
    .locked-feature-grid,
    .locked-dashboard-grid,
    .memory-stats-grid,
    .memory-hud,
    .memory-completion-grid
) {
    gap: var(--space-4);
}

:where(.form-field, .settings-fieldset, .developer-filter-form) label {
    color: var(--ink);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
}

input,
select,
textarea {
    min-height: 48px;
    padding: 12px 14px;
    border-color: var(--line);
    border-radius: var(--control-radius);
    color: var(--ink);
    background: var(--surface-strong);
    line-height: var(--line-height-base);
}

textarea {
    min-height: 132px;
}

input::placeholder,
textarea::placeholder {
    color: var(--muted);
    opacity: 0.78;
}

input[aria-invalid="true"],
select[aria-invalid="true"],
textarea[aria-invalid="true"] {
    border-color: var(--color-danger);
    box-shadow: 0 0 0 4px var(--color-danger-soft);
}

:where(
    button,
    .button-link,
    .back-btn,
    .auth-link,
    .secondary-link,
    .danger-link,
    .profile-menu-button,
    .profile-dropdown a,
    .settings-section-nav a,
    .memory-mode-switch a,
    .exhibition-flow-ribbon a,
    .tutor-starter-prompts button,
    .tutor-suggestion-chips button,
    .tutor-voice-tools button,
    .copy-response-button,
    .regenerate-response-button,
    .diagram-lightbox-close
) {
    min-height: 44px;
    border-radius: var(--control-radius);
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    transition:
        color var(--transition-base),
        background var(--transition-base),
        border-color var(--transition-base),
        box-shadow var(--transition-base),
        transform var(--transition-base),
        opacity var(--transition-base);
}

:where(
    button:not(.profile-menu-button):not(.secondary-link):not(.danger-link):not(.learning-card-plain-button):not(.diagram-related-topics button),
    .button-link:not(.secondary-link):not(.danger-link),
    .back-btn:not(.secondary-link):not(.danger-link)
) {
    background: var(--primary);
}

:where(button:not(.profile-menu-button), .button-link, .back-btn):not(.secondary-link):not(.danger-link) {
    --profile-menu-button-reset-compatible: 1;
}

.secondary-link {
    color: var(--primary);
    border: 1px solid rgba(49, 87, 213, 0.22);
    background: var(--color-primary-soft);
    box-shadow: none;
}

.secondary-link:hover,
.secondary-link:focus-visible {
    color: #ffffff;
    background: var(--primary);
    border-color: var(--primary);
}

.danger-link {
    color: #ffffff;
    border: 1px solid rgba(196, 85, 63, 0.28);
    background: var(--color-danger);
    box-shadow: 0 12px 24px rgba(196, 85, 63, 0.22);
}

.danger-link:hover,
.danger-link:focus-visible {
    background: #a94432;
}

:where(button, .button-link, .back-btn, .auth-link, .profile-menu-button):focus-visible {
    outline: none;
    box-shadow:
        var(--focus-ring),
        0 12px 24px rgba(49, 87, 213, 0.18);
}

:where(button, .button-link, .back-btn, .auth-link):disabled,
:where(button, .button-link, .back-btn, .auth-link).disabled,
:where(input, select, textarea):disabled {
    opacity: 0.58;
    transform: none;
    box-shadow: none;
}

.sidebar-nav {
    gap: var(--space-2);
}

.sidebar-nav a {
    min-height: 44px;
    padding: 10px 12px;
    border-radius: var(--control-radius);
}

.sidebar-nav a > span:first-child {
    display: grid;
    place-items: center;
    width: 28px;
}

.sidebar-nav a.active {
    color: var(--primary);
    background: var(--color-primary-soft);
    box-shadow: 0 10px 24px rgba(49, 87, 213, 0.1);
}

.dashboard-topbar-actions,
.auth-page-actions,
.header-actions,
.result-actions,
.revision-command-bar,
.mindmap-toolbar,
.flashcards-header-actions,
.flashcard-primary-actions,
.flashcard-secondary-actions,
.memory-actions,
.lesson-card-actions,
.diagram-actions,
.tutor-header-actions,
.tutor-message-actions,
.locked-modal-actions,
.exhibition-welcome-actions,
.exhibition-tour-actions,
.pwa-install-actions {
    gap: var(--space-3);
}

.dashboard-stat-card,
.performance-summary-grid div,
.score-card {
    min-height: 112px;
}

.dashboard-stat-card p,
.performance-summary-grid span,
.score-card h3,
.memory-stats-grid span,
.memory-hud span {
    color: var(--muted);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
}

.dashboard-stat-card strong,
.performance-summary-grid strong,
.score-card h2,
.memory-stats-grid strong,
.memory-hud strong {
    color: var(--ink);
    line-height: var(--line-height-tight);
}

.history-table-wrap,
.performance-table-wrap,
.developer-table-wrap {
    border: 1px solid var(--line);
    border-radius: var(--card-radius);
    background: var(--surface);
    box-shadow: var(--soft-shadow);
}

.history-table {
    border-collapse: separate;
    border-spacing: 0;
}

.history-table th,
.history-table td,
.important-questions-content th,
.important-questions-content td,
.tutor-message-content th,
.tutor-message-content td {
    padding: 14px 16px;
    border-color: var(--line);
    line-height: var(--line-height-base);
}

.history-table th,
.important-questions-content th,
.tutor-message-content th {
    color: var(--ink);
    background: var(--color-primary-soft);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-strong);
}

.history-table tbody tr {
    transition: background var(--transition-fast);
}

.history-table tbody tr:hover {
    background: var(--color-primary-soft);
}

.eyebrow,
.badge,
.status-pill,
.role-badge,
.mode-badge,
.verified-badge,
.guest-badge,
.coming-soon-pill {
    border-radius: var(--radius-pill);
    line-height: 1.2;
}

.flash-message {
    border-radius: var(--control-radius);
}

.flash-error {
    border-color: rgba(196, 85, 63, 0.28);
    background: var(--color-danger-soft);
}

.flash-success {
    border-color: rgba(31, 122, 77, 0.28);
    background: var(--color-success-soft);
}

.dark-mode :where(
    .dashboard-panel,
    .dashboard-stat-card,
    .activity-card,
    .performance-chart-card,
    .insight-card,
    .history-table-wrap,
    .learning-history-card,
    .learning-action-card,
    .feature-card,
    .score-card,
    .card,
    .recommendation-card,
    .evaluation-card,
    .teacher-report-card,
    .saved-quiz-card,
    .flashcard-study-panel,
    .memory-command-panel,
    .revision-sheet-card,
    .study-plan-card,
    .mindmap-stage,
    .tutor-chat-panel
) {
    box-shadow: var(--soft-shadow);
}

.dark-mode input,
.dark-mode select,
.dark-mode textarea {
    color: var(--ink);
    background: var(--surface-strong);
    border-color: var(--line);
}

.dark-mode input::placeholder,
.dark-mode textarea::placeholder {
    color: var(--muted);
    opacity: 0.72;
}

.dark-mode .secondary-link {
    color: var(--primary);
    background: var(--color-primary-soft);
    border-color: rgba(134, 161, 255, 0.2);
}

.dark-mode .secondary-link:hover,
.dark-mode .secondary-link:focus-visible {
    color: #10141f;
    background: var(--primary);
    border-color: var(--primary);
}

.dark-mode .history-table th,
.dark-mode .important-questions-content th,
.dark-mode .tutor-message-content th {
    background: rgba(134, 161, 255, 0.1);
}

.dark-mode .history-table tbody tr:hover {
    background: var(--color-primary-soft);
}

@media (max-width: 900px) {
    .lesson-navigator {
        display: none;
    }

    .lesson-hero h1 {
        font-size: clamp(1.9rem, 7vw, 3rem);
    }

    .tutor-header {
        grid-template-columns: 1fr;
        display: grid;
    }

    .continue-learning-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .revision-tool-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .mindmap-canvas {
        min-width: 720px;
    }

    .mindmap-branches {
        gap: 18px;
    }

    .tutor-header-actions {
        justify-content: flex-start;
    }

    .tutor-lesson-strip {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .tutor-chat-panel {
        grid-template-rows: minmax(420px, calc(100vh - 430px)) auto;
    }

    .dashboard-shell {
        display: block;
        width: min(100% - 20px, 1120px);
        margin-top: 72px;
    }

    .dashboard-menu-toggle {
        position: fixed;
        top: 12px;
        left: 12px;
        z-index: 80;
        display: inline-flex;
        width: auto;
        min-width: 48px;
        padding: 10px 14px;
        border-radius: 999px;
    }

    .student-sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: min(290px, 82vw);
        height: 100vh;
        min-height: 0;
        border-radius: 0 8px 8px 0;
        transform: translateX(-105%);
        transition: transform 0.28s var(--ease-premium), box-shadow 0.28s var(--ease-premium);
        overflow-y: auto;
    }

    .student-sidebar.is-open {
        transform: translateX(0);
    }

    .dashboard-sidebar-overlay {
        position: fixed;
        inset: 0;
        z-index: 44;
        display: block;
        background: rgba(16, 20, 31, 0.34);
        backdrop-filter: blur(0);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.22s var(--ease-premium), backdrop-filter 0.22s var(--ease-premium);
    }

    .dashboard-sidebar-overlay.is-open {
        opacity: 1;
        backdrop-filter: blur(4px);
        pointer-events: auto;
    }

    .dashboard-topbar,
    .dashboard-section-heading,
    .activity-card,
    .flashcard-success-banner,
    .flashcards-header,
    .memory-command-panel {
        display: grid;
    }

    .dashboard-topbar-actions,
    .flashcard-success-banner .button-link,
    .flashcards-header-actions,
    .memory-actions,
    .activity-card div:last-child {
        text-align: left;
        justify-content: start;
    }

    .dashboard-stat-grid,
    .dashboard-hero-grid,
    .dashboard-insight-grid,
    .study-plan-summary-grid,
    .xp-award-grid,
    .daily-challenge-grid,
    .achievement-progress-grid,
    .profile-gamification-grid,
    .exhibition-demo-grid,
    .exhibition-flow-ribbon,
    .rbac-stat-grid,
    .performance-stat-grid,
    .performance-summary-grid,
    .performance-chart-grid,
    .subject-analysis-grid,
    .developer-filter-form,
    .developer-detail-grid,
    .quick-actions-grid,
    .dashboard-content-grid,
    .performance-content-grid,
    .achievement-badge-grid,
    .recommended-topic-grid,
    .continue-learning-grid,
    .revision-tool-grid,
    .rbac-tool-grid,
    .rbac-table-grid,
    .history-tools,
    .learning-history-grid,
    .evaluation-summary-grid,
    .why-study-grid,
    .locked-feature-grid,
    .locked-dashboard-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .study-plan-preview-card {
        grid-template-columns: 1fr;
    }

    .memory-stats-grid,
    .memory-hud {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .memory-board {
        --memory-card-size: clamp(88px, 24vw, 128px);
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .settings-layout,
    .account-actions-grid {
        grid-template-columns: 1fr;
    }

    .settings-section-nav {
        position: static;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .exhibition-header {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .school-mark,
    .header-actions {
        justify-self: center;
    }

    .header-actions {
        align-items: center;
        align-self: center;
        justify-content: center;
    }

    .auth-nav {
        justify-content: center;
    }

    .hero {
        grid-template-columns: 1fr;
        min-height: auto;
        padding-top: 72px;
    }

    .hero-image {
        aspect-ratio: 16 / 9;
    }

    .features,
    .team-grid,
    .footer-grid,
    .form-grid,
    .profile-future-grid,
    .lesson-info-strip,
    .score-dashboard,
    .dashboard,
    .achievements,
    .answer-grid,
    .teacher-report-grid {
        grid-template-columns: 1fr;
    }

    .name-field,
    .subject-field,
    .class-field,
    .textbook-field,
    .chapter-field {
        grid-column: 1 / -1;
    }

    .features,
    .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .about-card {
        grid-template-columns: 1fr;
    }

    .project-overview-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .section-heading {
        display: block;
    }

    .section-heading h2 {
        margin-top: 12px;
        text-align: left;
    }

    .team-member,
    .team-member:nth-child(3) {
        border-right: 0;
        border-bottom: 0;
    }

    .team-member:last-child {
        border-bottom: 0;
    }

    .class-card {
        margin-top: 0;
        border-top: 0;
    }

    .bg-illustration {
        opacity: 0.052;
    }

    .bg-top-left {
        top: 96px;
        left: -48px;
    }

    .bg-top-right {
        top: 190px;
        right: -54px;
    }

    .bg-mid-left {
        display: none;
    }

    .bg-bottom-right {
        right: -64px;
        bottom: 80px;
    }

    .score-dashboard.evaluation-summary-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .dashboard-insight-grid {
        grid-template-columns: 1fr;
    }

    .continue-dashboard-panel {
        display: grid;
        align-items: start;
    }

    .continue-learning-button {
        width: fit-content;
    }

    .exhibition-welcome-screen {
        display: grid;
        align-items: start;
    }

    .exhibition-welcome-actions {
        justify-content: flex-start;
    }
}

@media (max-width: 560px) {
    .reading-progress {
        height: 4px;
    }

    .lesson-hero {
        padding: 18px;
    }

    .learn-page .lesson-info-strip {
        display: grid;
        grid-template-columns: 1fr;
    }

    .learn-page .lesson-info-strip span {
        justify-content: space-between;
        width: 100%;
        border-radius: var(--control-radius);
    }

    .content {
        font-size: 1rem;
        line-height: 1.72;
    }

    .content h1,
    .content h2,
    .content h3 {
        margin-top: 28px;
    }

    .lesson-callout {
        padding: 14px 14px 14px 44px;
    }

    .pwa-install-banner {
        right: 10px;
        bottom: 10px;
        left: 10px;
        grid-template-columns: 1fr;
        width: auto;
    }

    .pwa-install-actions,
    .pwa-install-actions button {
        width: 100%;
    }

    .dashboard-shell {
        width: min(100% - 20px, 1120px);
    }

    .performance-page .dashboard-shell,
    .performance-page .dashboard-main,
    .performance-page .dashboard-panel,
    .performance-page .dashboard-content-grid,
    .performance-page .performance-content-grid,
    .performance-page .performance-chart-grid,
    .performance-page .performance-chart-card,
    .performance-page .performance-table-wrap {
        min-width: 0;
        max-width: 100%;
    }

    .performance-page .performance-chart-card canvas {
        width: 100% !important;
        max-width: 100% !important;
    }

    .performance-page .performance-table {
        min-width: 0;
        width: 100%;
    }

    .performance-page .performance-table th,
    .performance-page .performance-table td {
        padding: 12px 10px;
        overflow-wrap: anywhere;
    }

    .dashboard-topbar,
    .dashboard-panel {
        padding: 20px;
    }

    .settings-section-nav {
        grid-template-columns: 1fr;
    }

    .segmented-options label,
    .segmented-options span {
        width: 100%;
    }

    .dashboard-topbar-actions,
    .dashboard-topbar-actions .button-link,
    .dashboard-topbar-actions .auth-nav,
    .tutor-header-actions,
    .tutor-header-actions .button-link,
    .tutor-header-actions .auth-nav,
    .tutor-lesson-strip,
    .dashboard-stat-grid,
    .dashboard-hero-grid,
    .dashboard-insight-grid,
    .study-plan-summary-grid,
    .weekly-summary-grid,
    .xp-award-grid,
    .daily-challenge-grid,
    .achievement-progress-grid,
    .profile-gamification-grid,
    .exhibition-demo-grid,
    .exhibition-flow-ribbon,
    .rbac-stat-grid,
    .performance-stat-grid,
    .performance-summary-grid,
    .performance-chart-grid,
    .subject-analysis-grid,
    .developer-filter-form,
    .developer-detail-grid,
    .quick-actions-grid,
    .dashboard-content-grid,
    .performance-content-grid,
    .achievement-badge-grid,
    .recommended-topic-grid,
    .continue-learning-grid,
    .revision-tool-grid,
    .rbac-tool-grid,
    .rbac-table-grid,
    .history-tools,
    .learning-history-grid,
    .evaluation-summary-grid,
    .answer-grid,
    .teacher-report-grid,
    .why-study-grid,
    .locked-feature-grid,
    .locked-dashboard-grid,
    .account-motivation-card ul {
        grid-template-columns: 1fr;
        width: 100%;
    }

    .study-plan-task {
        grid-template-columns: 44px minmax(0, 1fr);
    }

    .study-plan-task .button-link,
    .study-plan-task button,
    .study-plan-task form,
    .study-plan-complete-label {
        grid-column: 1 / -1;
        width: 100%;
    }

    .mode-banner,
    .account-motivation-card {
        display: grid;
    }

    .locked-modal-actions,
    .locked-modal-actions .button-link,
    .locked-modal-actions button {
        width: 100%;
    }

    .revision-layout {
        grid-template-columns: 1fr;
    }

    .revision-section-nav {
        position: static;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .revision-command-bar,
    .revision-command-bar .button-link,
    .revision-command-bar button,
    .revision-command-bar form {
        width: 100%;
    }

    .mindmap-stage,
    .mindmap-scroll {
        min-height: 520px;
    }

    .mindmap-scroll {
        padding: 22px 16px;
    }

    .mindmap-canvas {
        min-width: 620px;
    }

    .mindmap-toolbar,
    .mindmap-toolbar .button-link,
    .mindmap-toolbar button,
    .mindmap-toolbar form {
        width: 100%;
    }

    .mindmap-branch-item {
        min-width: 132px;
        max-width: 180px;
    }

    .dashboard-stat-card {
        min-height: 96px;
    }

    .dashboard-quote-card {
        min-height: 210px;
    }

    .compact-heading {
        display: grid;
        justify-items: start;
    }

    .tutor-preview-card {
        grid-template-columns: 1fr;
    }

    .tutor-preview-card .button-link {
        grid-column: 1;
        width: 100%;
    }

    .continue-learning-button,
    .recommendation-focus-card .button-link,
    .beautiful-empty-state .button-link,
    .exhibition-welcome-actions,
    .exhibition-welcome-actions .button-link,
    .exhibition-welcome-actions button,
    .exhibition-tour-actions,
    .exhibition-tour-actions button {
        width: 100%;
    }

    .exhibition-toolbar {
        right: 10px;
        bottom: 10px;
        left: 10px;
        justify-content: space-between;
        max-width: none;
    }

    .exhibition-flow-ribbon a {
        grid-template-columns: 32px minmax(0, 1fr);
    }

    .quick-actions-grid a {
        min-height: 94px;
    }

    .lesson-card-actions,
    .lesson-card-actions .button-link,
    .lesson-card-actions form,
    .lesson-card-actions button,
    .diagram-actions,
    .diagram-actions form,
    .diagram-actions .button-link,
    .diagram-actions button,
    .continue-learning-grid,
    .revision-tool-grid,
    .learning-action-card,
    .learning-card-form,
    .learning-card-form button,
    .learning-card-button,
    .tutor-start-form,
    .tutor-start-form button,
    .tutor-quiz-cta,
    .tutor-quiz-cta form,
    .tutor-quiz-cta button {
        width: 100%;
    }

    .flashcards-header-actions,
    .flashcard-success-banner .button-link,
    .flashcards-header-actions .button-link,
    .flashcards-header-actions .auth-nav,
    .memory-command-panel,
    .memory-mode-switch,
    .memory-mode-switch a,
    .memory-actions,
    .flashcard-primary-actions button,
    .flashcard-secondary-actions button {
        width: 100%;
    }

    .memory-stats-grid,
    .memory-hud,
    .memory-completion-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .memory-board {
        --memory-card-size: clamp(118px, 42vw, 160px);
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 9px;
    }

    .memory-card {
        min-height: 104px;
    }

    .memory-card-front strong {
        font-size: 0.78rem;
        -webkit-line-clamp: 5;
    }

    .evaluation-card-header,
    .marks-row {
        align-items: flex-start;
        flex-direction: column;
    }

    .status-pill {
        width: 100%;
    }

    .score-dashboard.evaluation-summary-grid {
        grid-template-columns: 1fr;
    }

    .dashboard-menu-toggle {
        top: 10px;
        left: 10px;
    }

    .container,
    .learn-container,
    .tutor-shell {
        width: min(100% - 20px, 1120px);
        margin: 10px auto 22px;
    }

    .hero,
    .exhibition-header,
    .project-team-card,
    .welcome-card,
    .about-card,
    .learn-container,
    .tutor-header {
        padding: 20px;
    }

    .tutor-chat-panel {
        grid-template-rows: minmax(380px, calc(100vh - 360px)) auto;
    }

    .tutor-quiz-cta {
        display: grid;
    }

    .tutor-messages {
        min-height: 380px;
        padding: 16px;
    }

    .tutor-message-row {
        max-width: 100%;
    }

    .tutor-avatar {
        width: 34px;
        height: 34px;
    }

    .tutor-input-row {
        grid-template-columns: 1fr;
    }

    .tutor-voice-tools {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .tutor-voice-tools button {
        width: 100%;
    }

    #voice-status {
        grid-column: 1 / -1;
    }

    .tutor-input-row button {
        width: 100%;
    }

    .hero {
        padding-top: 68px;
    }

    h1 {
        font-size: 2.2rem;
    }

    .notes-download-form,
    .quiz-start-form,
    .result-actions,
    .study-form > button,
    button,
    .button-link,
    .back-btn {
        width: 100%;
    }

    .auth-header-row {
        display: grid;
    }

    .auth-header-row .button-link,
    .auth-page-actions,
    .auth-nav {
        width: 100%;
    }

    .auth-page-actions,
    .auth-nav,
    .header-actions {
        justify-content: center;
    }

    .header-actions {
        width: 100%;
    }

    .profile-menu {
        width: min(100%, 285px);
    }

    .profile-menu-button {
        width: 100%;
        max-width: none;
    }

    .profile-dropdown {
        left: 50%;
        right: auto;
        transform: translate(-50%, -8px) scale(0.98);
        transform-origin: top center;
    }

    .profile-menu.is-open .profile-dropdown {
        transform: translate(-50%, 0) scale(1);
    }

    .auth-link {
        width: 100%;
    }

    .profile-card-header {
        display: grid;
    }

    .profile-details div {
        grid-template-columns: 1fr;
        gap: 4px;
    }

    .school-name {
        font-size: 0.96rem;
    }

    .hero-tagline {
        width: 100%;
        text-align: center;
    }

    .school-mark {
        width: 118px;
        padding: 10px;
    }

    .school-logo {
        width: 96px;
        height: 96px;
    }

    .exhibition-badge {
        width: 100%;
        border-radius: 8px;
        text-align: center;
    }

    .team-member {
        grid-template-columns: 42px minmax(0, 1fr);
        padding: 16px 0;
    }

    .team-icon {
        width: 40px;
        height: 40px;
    }

    .features,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .project-overview-grid {
        grid-template-columns: 1fr;
    }

    .overview-panel-wide {
        grid-column: auto;
    }

    .tech-badges span {
        flex: 1 1 auto;
        justify-content: center;
    }

    .page-illustrations {
        display: none;
    }

    .page-transition-card {
        padding: 22px;
    }

    .page-transition-brand {
        grid-template-columns: 44px minmax(0, 1fr);
        gap: 12px;
        margin-bottom: 20px;
    }

    .page-transition-logo {
        width: 44px;
    }

    .page-transition-spinner {
        width: 50px;
        height: 50px;
        border-width: 5px;
    }

    .loader-icons {
        gap: 8px;
    }

    .loader-icons span {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }
}

@media (max-width: 900px) {
    .download-center-hero,
    .download-report-main {
        align-items: stretch;
    }

    .download-center-hero {
        display: grid;
    }

    .download-center-count {
        width: 100%;
        min-height: 92px;
        grid-template-columns: auto auto;
        justify-content: center;
        gap: 10px;
    }

    .download-report-grid,
    .favourite-notes-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 560px) {
    .download-report-main,
    .download-report-details,
    .favourite-note-card-header,
    .favourite-note-meta {
        grid-template-columns: 1fr;
    }

    .download-report-icon,
    .favourite-note-icon {
        width: 46px;
        height: 46px;
    }

    .download-report-actions,
    .download-report-actions .button-link,
    .download-report-actions form,
    .download-report-actions button,
    .lesson-primary-actions,
    .lesson-primary-actions .button-link,
    .lesson-primary-actions form,
    .lesson-primary-actions button,
    .favourite-note-actions,
    .favourite-note-actions .button-link,
    .favourite-note-actions form,
    .favourite-note-actions button {
        width: 100%;
    }
}

.dark-mode .health-status-card,
.dark-mode .support-category-card,
.dark-mode .feature-status-grid article,
.dark-mode .info-metric-grid article,
.dark-mode .service-status-row,
.dark-mode .faq-list details,
.dark-mode .help-center-pulse {
    border-color: rgba(127, 153, 255, 0.22);
    background:
        linear-gradient(145deg, rgba(23, 32, 51, 0.88), rgba(15, 23, 42, 0.94)),
        rgba(15, 23, 42, 0.9);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.08) inset, var(--soft-shadow);
}

.dark-mode .health-card-topline strong,
.dark-mode .support-category-card strong,
.dark-mode .feature-status-grid strong,
.dark-mode .service-status-row strong,
.dark-mode .info-metric-grid strong,
.dark-mode .support-feedback-form label > span,
.dark-mode .faq-list summary,
.dark-mode .help-center-pulse strong {
    color: var(--ink);
}

.dark-mode .support-category-card p,
.dark-mode .faq-list p,
.dark-mode .health-card-meta small,
.dark-mode .service-status-row span,
.dark-mode .info-metric-grid span {
    color: var(--muted);
}

.dark-mode .system-panel-loading .panel-skeleton-stack span {
    background:
        linear-gradient(90deg, rgba(127, 153, 255, 0.1), rgba(255, 255, 255, 0.16), rgba(127, 153, 255, 0.1));
    background-size: 220% 100%;
}

@media (max-width: 1100px) {
    .health-card-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .support-category-grid,
    .feature-status-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 700px) {
    .health-card-grid,
    .support-category-grid,
    .feature-status-grid,
    .info-metric-grid,
    .help-center-hero {
        grid-template-columns: 1fr;
    }

    .health-card-meta {
        align-items: flex-start;
        flex-direction: column;
    }

    .service-status-row {
        align-items: flex-start;
        flex-direction: column;
    }

    .help-center-pulse,
    .support-feedback-form button {
        width: 100%;
    }
}

@media print {
    body.mindmap-page {
        background: #ffffff;
    }

    body.mindmap-page .auth-page-actions,
    body.mindmap-page .mindmap-toolbar,
    body.mindmap-page footer {
        display: none;
    }

    body.mindmap-page .learn-container {
        width: 100%;
        max-width: none;
        margin: 0;
        padding: 0;
        border: 0;
        box-shadow: none;
    }

    body.mindmap-page .mindmap-stage {
        min-height: auto;
        border: 0;
        box-shadow: none;
        background: #ffffff;
    }

    body.mindmap-page .mindmap-scroll {
        min-height: auto;
        overflow: visible;
        padding: 16px 0;
    }

    body.mindmap-page .mindmap-canvas {
        min-width: 0;
        transform: none !important;
    }

    body.mindmap-page .is-collapsed > .mindmap-branches {
        display: flex;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}

/* Premium homepage and dashboard refresh */
body.home-page,
body.dashboard-page {
    --premium-radius: 20px;
    --premium-radius-sm: 18px;
    --premium-glass: rgba(255, 255, 255, 0.68);
    --premium-glass-strong: rgba(255, 255, 255, 0.82);
    --premium-border: rgba(99, 102, 241, 0.18);
    --premium-border-strong: rgba(79, 70, 229, 0.26);
    --premium-shadow: 0 26px 70px rgba(31, 38, 72, 0.14);
    --premium-shadow-soft: 0 16px 42px rgba(31, 38, 72, 0.1);
    --premium-accent: linear-gradient(135deg, #4f7cff 0%, #8b5cf6 52%, #22c5d8 100%);
    --premium-accent-soft: linear-gradient(135deg, rgba(79, 124, 255, 0.16), rgba(139, 92, 246, 0.12), rgba(34, 197, 216, 0.14));
    --premium-text: #111827;
    --premium-muted: #667085;
    background:
        radial-gradient(circle at 10% 8%, rgba(83, 120, 255, 0.22), transparent 30%),
        radial-gradient(circle at 86% 7%, rgba(168, 85, 247, 0.16), transparent 27%),
        radial-gradient(circle at 64% 38%, rgba(34, 197, 216, 0.1), transparent 24%),
        radial-gradient(circle at 78% 76%, rgba(34, 197, 216, 0.17), transparent 30%),
        linear-gradient(180deg, #fbfdff 0%, #eef4ff 46%, #f6fbff 100%);
}

body.home-page::before,
body.dashboard-page::before {
    opacity: 0.28;
    background-image:
        linear-gradient(rgba(65, 78, 118, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(65, 78, 118, 0.06) 1px, transparent 1px);
    background-size: 42px 42px;
    mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0.48) 56%, transparent 100%);
}

body.home-page::after,
body.dashboard-page::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    opacity: 0.035;
    background:
        url("images/backgrounds/ai-brain-circuit.svg") 9% 18% / 250px auto no-repeat,
        url("images/backgrounds/home-education.svg") 92% 14% / 280px auto no-repeat,
        url("images/backgrounds/learn-doodles.svg") 86% 72% / 230px auto no-repeat;
    filter: saturate(1.08);
}

body.dashboard-page::after {
    opacity: 0.055;
}

.home-page .bg-illustration {
    opacity: 0.025;
}

.home-page .premium-home-container {
    --premium-nav-height: 104px;
    width: min(1280px, calc(100% - 36px));
    margin: 18px auto 36px;
}

.home-page .premium-home-nav {
    position: sticky;
    top: 12px;
    z-index: 100;
    display: grid;
    grid-template-columns: minmax(370px, 1.15fr) auto minmax(220px, 0.85fr);
    align-items: center;
    gap: clamp(14px, 2vw, 28px);
    min-height: var(--premium-nav-height);
    padding: 11px 18px;
    border: 1px solid rgba(255, 255, 255, 0.7);
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.64);
    box-shadow: 0 18px 50px rgba(31, 38, 72, 0.12);
    backdrop-filter: blur(22px);
}

.premium-brand {
    display: inline-grid;
    grid-template-columns: 78px minmax(0, 1fr);
    align-items: center;
    gap: 18px;
    min-width: 0;
    color: var(--premium-text);
    text-decoration: none;
}

.premium-brand strong,
.sidebar-brand strong {
    letter-spacing: 0;
}

.premium-brand strong {
    display: block;
    color: var(--premium-text);
    font-size: clamp(1.85rem, 2.3vw, 2.05rem);
    line-height: 1.02;
}

.premium-brand-copy {
    display: grid;
    gap: 5px;
    min-width: 0;
}

.premium-brand-copy > span {
    overflow: hidden;
    color: #475467;
    font-size: 0.84rem;
    font-weight: 800;
    line-height: 1.2;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.premium-brand small {
    display: block;
    overflow: hidden;
    color: #8a94a6;
    font-size: 0.74rem;
    font-weight: 650;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.home-page .premium-school-mark {
    width: 78px;
    height: 78px;
    padding: 3px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.72);
    box-shadow: 0 14px 34px rgba(79, 124, 255, 0.16);
    overflow: hidden;
}

.home-page .premium-school-mark .school-logo {
    width: auto;
    max-width: 100%;
    height: 68px;
    max-height: 100%;
    object-fit: contain;
    object-position: center;
}

.premium-home-links {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 4px;
    border: 1px solid rgba(99, 102, 241, 0.12);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.48);
}

.premium-home-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 36px;
    padding: 8px 12px;
    border-radius: 999px;
    color: #344054;
    font-size: 0.88rem;
    font-weight: 900;
    text-decoration: none;
    transition: transform 0.2s var(--ease-premium), color 0.2s var(--ease-premium), background 0.2s var(--ease-premium);
}

.premium-home-links a:hover,
.premium-home-links a:focus-visible {
    color: #3157d5;
    background: rgba(79, 124, 255, 0.1);
    outline: none;
    transform: translateY(-1px);
}

.home-page .premium-header-actions {
    align-self: center;
    justify-self: end;
}

.home-page .premium-header-actions .auth-nav {
    flex-wrap: nowrap;
}

.home-page .premium-home-hero {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(420px, 1.05fr);
    gap: clamp(38px, 4.5vw, 64px);
    align-items: start;
    min-height: 720px;
    margin-top: clamp(32px, 4vw, 48px);
    padding: clamp(42px, 4.6vw, 62px);
    scroll-margin-top: calc(var(--premium-nav-height) + 28px);
    border: 1px solid rgba(255, 255, 255, 0.7);
    border-radius: 28px;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.68), rgba(255, 255, 255, 0.36)),
        var(--premium-accent-soft);
    box-shadow: var(--premium-shadow);
    overflow: hidden;
    backdrop-filter: blur(24px);
}

.home-page .premium-home-hero::before,
.home-page .premium-home-hero::after {
    content: "";
    position: absolute;
    pointer-events: none;
    border-radius: 999px;
    filter: blur(2px);
}

.home-page .premium-home-hero::before {
    width: 320px;
    height: 320px;
    right: -42px;
    top: -34px;
    border-radius: 0;
    background: url("images/backgrounds/ai-brain-circuit.svg") center / contain no-repeat;
    filter: none;
    opacity: 0.045;
}

.home-page .premium-home-hero::after {
    width: 280px;
    height: 280px;
    left: -90px;
    bottom: -120px;
    background: radial-gradient(circle, rgba(34, 197, 216, 0.2), transparent 68%);
}

.premium-hero-copy,
.premium-learning-stage,
.premium-stat-strip,
.premium-section,
.premium-glass-section {
    position: relative;
    z-index: 1;
}

.premium-hero-copy {
    display: grid;
    gap: 26px;
    align-content: start;
    align-self: start;
    padding-top: clamp(10px, 1.5vw, 20px);
    animation: premiumFadeUp 0.72s var(--ease-premium) both;
}

.premium-hero-copy .eyebrow,
.premium-learning-card .eyebrow,
.premium-section .eyebrow,
.dashboard-page .eyebrow {
    color: #4f46e5;
    font-size: 0.76rem;
    letter-spacing: 0.1em;
}

.premium-hero-copy h1 {
    max-width: 650px;
    margin: 0;
    color: var(--premium-text);
    font-size: clamp(2.8rem, 4.35vw, 4.65rem);
    line-height: 1.06;
    letter-spacing: 0;
}

.premium-hero-copy h1 span {
    display: block;
    white-space: nowrap;
}

.premium-hero-subtitle {
    max-width: 610px;
    margin: 0;
    color: #475467;
    font-size: clamp(1rem, 1.35vw, 1.2rem);
    line-height: 1.82;
}

.premium-feature-chips {
    gap: 10px;
    max-width: 660px;
}

.premium-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.home-page .premium-hero-actions .button-link:first-child {
    min-height: 56px;
    padding: 15px 25px;
    font-size: 1.02rem;
    box-shadow: 0 20px 44px rgba(79, 124, 255, 0.34), 0 0 0 1px rgba(255, 255, 255, 0.36) inset;
}

.home-page .button-link,
.home-page button:not(.profile-menu-button),
.dashboard-page .button-link,
.dashboard-page button:not(.profile-menu-button):not(.dashboard-menu-toggle) {
    border-radius: 18px;
}

.home-page .button-link:not(.secondary-link),
.home-page .start-learning-btn,
.home-page button:not(.secondary-link):not(.danger-link):not(.profile-menu-button):not(.premium-action-card):not([data-locked-feature]),
.dashboard-page .button-link:not(.secondary-link):not(.danger-link),
.dashboard-page button:not(.secondary-link):not(.danger-link):not(.profile-menu-button):not(.dashboard-menu-toggle) {
    border-color: transparent;
    background: var(--premium-accent);
    box-shadow: 0 18px 38px rgba(79, 124, 255, 0.3), 0 0 0 1px rgba(255, 255, 255, 0.34) inset;
}

.home-page .button-link:hover,
.home-page button:not(.profile-menu-button):hover,
.dashboard-page .button-link:hover,
.dashboard-page button:not(.profile-menu-button):not(.dashboard-menu-toggle):hover {
    transform: translateY(-3px);
}

.home-page .secondary-link,
.dashboard-page .secondary-link {
    border: 1px solid rgba(99, 102, 241, 0.2);
    color: #344054;
    background: rgba(255, 255, 255, 0.76);
    box-shadow: 0 12px 30px rgba(31, 38, 72, 0.08), 0 0 0 1px rgba(255, 255, 255, 0.5) inset;
}

.home-page .premium-feature-chips span {
    min-height: 42px;
    padding: 9px 14px;
    border-color: rgba(99, 102, 241, 0.18);
    border-radius: 999px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0.45)),
        rgba(255, 255, 255, 0.62);
    box-shadow: 0 14px 32px rgba(31, 38, 72, 0.08);
    color: #26324a;
    backdrop-filter: blur(16px);
    transition: transform 0.2s var(--ease-premium), box-shadow 0.2s var(--ease-premium), border-color 0.2s var(--ease-premium);
}

.home-page .premium-feature-chips span:hover {
    border-color: rgba(79, 124, 255, 0.35);
    box-shadow: 0 20px 44px rgba(79, 124, 255, 0.16);
    transform: translateY(-3px) scale(1.02);
}

.premium-learning-stage {
    display: grid;
    justify-items: center;
    align-self: start;
}

.premium-ai-orbit {
    position: relative;
    z-index: 3;
    display: grid;
    place-items: center;
    width: clamp(106px, 10vw, 136px);
    height: clamp(106px, 10vw, 136px);
    flex: 0 0 auto;
    border: 1px solid rgba(255, 255, 255, 0.68);
    border-radius: 30px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0.32)),
        var(--premium-accent);
    box-shadow: 0 22px 52px rgba(79, 124, 255, 0.24);
    overflow: hidden;
    animation: premiumFloat 5.6s ease-in-out infinite;
}

.premium-ai-orbit::after {
    content: "";
    position: absolute;
    inset: 11px;
    border: 1px solid rgba(255, 255, 255, 0.72);
    border-radius: 22px;
    pointer-events: none;
}

.premium-ai-orbit img {
    width: 108%;
    height: 108%;
    object-fit: cover;
    object-position: 78% 50%;
    filter: saturate(1.12) contrast(1.02);
}

.home-page .premium-learning-card {
    width: min(100%, 560px);
    margin: 0;
    padding: clamp(28px, 3.5vw, 42px);
    border: 1px solid rgba(255, 255, 255, 0.72);
    border-radius: 26px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.86), rgba(255, 255, 255, 0.54)),
        rgba(255, 255, 255, 0.74);
    box-shadow: 0 30px 82px rgba(31, 38, 72, 0.16), 0 1px 0 rgba(255, 255, 255, 0.66) inset;
    backdrop-filter: blur(24px);
    animation: premiumSlideUp 0.72s 0.12s var(--ease-premium) both;
}

.learning-card-header {
    display: flex;
    align-items: start;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 30px;
}

.learning-card-visual {
    display: grid;
    flex: 0 0 auto;
    justify-items: end;
    gap: 10px;
}

.learning-card-header h2 {
    margin: 7px 0 0;
    color: var(--premium-text);
    font-size: clamp(1.95rem, 2.55vw, 2.45rem);
    line-height: 1.08;
}

.learning-card-status {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 8px 11px;
    border: 1px solid rgba(34, 197, 216, 0.26);
    border-radius: 999px;
    color: #036672;
    background: rgba(34, 197, 216, 0.1);
    font-size: 0.78rem;
    font-weight: 900;
    white-space: nowrap;
}

.home-page .premium-learning-card .form-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.home-page .premium-learning-card .name-field,
.home-page .premium-learning-card .subject-field,
.home-page .premium-learning-card .textbook-field,
.home-page .premium-learning-card .chapter-field {
    grid-column: 1 / -1;
}

.home-page .premium-learning-card label {
    margin-bottom: 10px;
    color: #344054;
    font-size: 0.9rem;
}

.home-page .textbook-helper {
    margin: -3px 0 11px;
    color: var(--premium-muted);
    font-size: 0.78rem;
    line-height: 1.45;
}

.home-page input,
.home-page select,
.dashboard-page input,
.dashboard-page select,
.dashboard-page textarea {
    border-radius: 18px;
    border-color: rgba(99, 102, 241, 0.18);
    background: rgba(255, 255, 255, 0.82);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.7) inset;
}

.home-page input:focus,
.home-page select:focus,
.dashboard-page input:focus,
.dashboard-page select:focus,
.dashboard-page textarea:focus {
    border-color: rgba(79, 124, 255, 0.58);
    box-shadow: 0 0 0 4px rgba(79, 124, 255, 0.14), 0 12px 30px rgba(79, 124, 255, 0.1);
}

.home-page .subject-hints {
    gap: 8px;
    margin-bottom: 12px;
}

.home-page .subject-hints span,
.home-page .feature-list li,
.home-page .highlight-chip-grid span,
.home-page .tech-badges span,
.dashboard-page .xp-award-grid span,
.dashboard-page .weekly-summary-grid span,
.dashboard-page .today-study-goal-meta span {
    border-radius: 999px;
    border-color: rgba(99, 102, 241, 0.14);
    background: rgba(255, 255, 255, 0.58);
}

.home-page .start-learning-btn {
    width: 100%;
    min-height: 66px;
    margin-top: 24px;
    font-size: 1.06rem;
    font-weight: 900;
}

.home-page .start-learning-btn[disabled] {
    background: linear-gradient(135deg, rgba(148, 163, 184, 0.72), rgba(100, 116, 139, 0.66));
    box-shadow: none;
}

.home-page .autocomplete-menu {
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.92);
    box-shadow: 0 24px 58px rgba(31, 38, 72, 0.18);
    backdrop-filter: blur(22px);
}

.home-page .autocomplete-option {
    border-radius: 16px;
}

.home-page .autocomplete-option[aria-selected="true"],
.home-page .autocomplete-option:hover {
    background: rgba(79, 124, 255, 0.1);
}

.home-page .selection-info-card,
.home-page .popular-chapters-panel {
    border-radius: 18px;
    border-color: rgba(99, 102, 241, 0.16);
    background: rgba(255, 255, 255, 0.58);
}

.premium-stat-strip {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 12px;
    margin: 18px 0 28px;
}

.premium-stat-strip article {
    display: grid;
    grid-template-columns: 42px minmax(0, 1fr);
    align-items: center;
    gap: 12px;
    min-width: 0;
    min-height: 96px;
    padding: 18px;
    border: 1px solid rgba(255, 255, 255, 0.72);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.62);
    box-shadow: var(--premium-shadow-soft);
    backdrop-filter: blur(20px);
    transition: transform 0.2s var(--ease-premium), box-shadow 0.2s var(--ease-premium);
    animation: premiumFadeUp 0.62s var(--ease-premium) both;
}

.premium-stat-icon {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 16px;
    color: #ffffff;
    background: var(--premium-accent);
    box-shadow: 0 12px 26px rgba(79, 124, 255, 0.2);
}

.premium-stat-strip article:nth-child(2) {
    animation-delay: 0.04s;
}

.premium-stat-strip article:nth-child(3) {
    animation-delay: 0.08s;
}

.premium-stat-strip article:nth-child(4) {
    animation-delay: 0.12s;
}

.premium-stat-strip article:nth-child(5) {
    animation-delay: 0.16s;
}

.premium-stat-strip article:nth-child(6) {
    animation-delay: 0.2s;
}

.premium-stat-strip article:hover {
    transform: translateY(-4px);
    box-shadow: 0 22px 52px rgba(79, 124, 255, 0.14);
}

.premium-stat-strip article div > span,
.premium-action-card small {
    display: block;
    color: var(--premium-muted);
    font-size: 0.8rem;
    font-weight: 800;
}

.premium-stat-strip strong {
    display: block;
    margin-top: 8px;
    color: var(--premium-text);
    font-size: clamp(1rem, 1.3vw, 1.28rem);
    line-height: 1.15;
}

.premium-section,
.premium-glass-section,
.home-page .feature-showcase-section,
.home-page .platform-highlights-card,
.home-page .why-study-card,
.home-page .project-team-card,
.home-page .about-card,
.home-page .account-motivation-card,
.home-page .guest-locked-card {
    margin-top: 34px;
    padding: clamp(22px, 3.2vw, 36px);
    border: 1px solid rgba(255, 255, 255, 0.72);
    border-radius: 24px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0.46)),
        rgba(255, 255, 255, 0.62);
    box-shadow: var(--premium-shadow-soft);
    backdrop-filter: blur(22px);
}

.premium-action-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
}

.premium-action-card {
    position: relative;
    display: grid;
    grid-template-rows: auto auto 1fr;
    gap: 9px;
    min-height: 166px;
    min-width: 0;
    padding: 18px;
    border: 1px solid rgba(255, 255, 255, 0.7);
    border-radius: 20px;
    color: var(--premium-text);
    text-align: left;
    text-decoration: none;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0.48)),
        rgba(255, 255, 255, 0.68);
    box-shadow: 0 16px 38px rgba(31, 38, 72, 0.08);
    cursor: pointer;
    overflow: hidden;
    transition: transform 0.22s var(--ease-premium), box-shadow 0.22s var(--ease-premium), border-color 0.22s var(--ease-premium);
}

.premium-action-card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: var(--premium-accent);
    opacity: 0;
    mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    mask-composite: exclude;
    pointer-events: none;
    transition: opacity 0.22s var(--ease-premium);
}

.premium-action-card:hover,
.premium-action-card:focus-visible {
    border-color: rgba(79, 124, 255, 0.28);
    box-shadow: 0 24px 58px rgba(79, 124, 255, 0.15);
    outline: none;
    transform: translateY(-5px);
}

.premium-action-card:hover::before,
.premium-action-card:focus-visible::before {
    opacity: 0.8;
}

.premium-action-card > span {
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    border-radius: 17px;
    color: #ffffff;
    background: var(--premium-accent);
    box-shadow: 0 12px 28px rgba(79, 124, 255, 0.2);
    font-size: 1.1rem;
    transition: transform 0.22s var(--ease-premium);
}

.premium-action-card:hover > span,
.premium-action-card:focus-visible > span {
    transform: translateY(-2px) scale(1.04);
}

.premium-action-card strong {
    color: var(--premium-text);
    font-size: 1.03rem;
    line-height: 1.2;
}

.home-page .feature-card {
    display: grid;
    align-content: start;
    min-height: 214px;
    padding: 22px;
    border-radius: 20px;
    border-color: rgba(255, 255, 255, 0.72);
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0.48)),
        rgba(255, 255, 255, 0.68);
    box-shadow: 0 16px 38px rgba(31, 38, 72, 0.08);
}

.home-page .features {
    align-items: stretch;
}

.home-page .feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 24px 58px rgba(79, 124, 255, 0.14);
}

.home-page .feature-icon,
.home-page .team-icon {
    width: 52px;
    height: 52px;
    border-radius: 17px;
    background: var(--premium-accent);
}

.home-page .section-heading {
    gap: 12px;
    margin-bottom: 22px;
    border-bottom-color: rgba(99, 102, 241, 0.12);
}

.home-page .section-heading h2 {
    font-size: clamp(1.55rem, 2.4vw, 2.25rem);
    line-height: 1.1;
}

.home-page .section-heading h2,
.home-page .feature-card h3,
.home-page .why-study-grid h3,
.home-page .overview-panel h3,
.home-page .team-member h3,
.home-page .member-name {
    color: var(--premium-text);
}

.home-page .team-grid {
    gap: 12px;
    border: 0;
    background: transparent;
}

.home-page .team-member,
.home-page .overview-panel,
.home-page .why-study-grid article,
.home-page .locked-feature-grid button {
    border: 1px solid rgba(255, 255, 255, 0.68);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.54);
    box-shadow: 0 12px 32px rgba(31, 38, 72, 0.06);
}

.home-page .class-card {
    grid-column: auto;
}

.dashboard-page {
    --dashboard-sidebar-width: 286px;
}

.dashboard-page .dashboard-shell {
    width: min(1440px, calc(100% - 32px));
    gap: 20px;
    margin-top: 20px;
}

.dashboard-page .student-sidebar,
.dashboard-page .dashboard-topbar,
.dashboard-page .dashboard-panel,
.dashboard-page .dashboard-stat-card {
    border: 1px solid rgba(255, 255, 255, 0.72);
    border-radius: 24px;
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0.48)),
        rgba(255, 255, 255, 0.62);
    box-shadow: var(--premium-shadow-soft);
    backdrop-filter: blur(22px);
}

.dashboard-page .student-sidebar {
    top: 20px;
    min-height: calc(100vh - 40px);
    padding: 16px;
}

.dashboard-page .sidebar-brand {
    border-radius: 20px;
    border-color: rgba(99, 102, 241, 0.18);
    background: rgba(255, 255, 255, 0.56);
}

.dashboard-page .sidebar-brand-icon,
.dashboard-page .dashboard-stat-card > span,
.dashboard-page .chart-icon,
.dashboard-page .student-identity-card > span,
.dashboard-page .profile-dropdown-user > span {
    border-radius: 17px;
    background: var(--premium-accent);
}

.dashboard-page .sidebar-nav a {
    min-height: 46px;
    border-radius: 16px;
    color: #344054;
}

.dashboard-page .sidebar-nav a:hover,
.dashboard-page .sidebar-nav a.active {
    color: #ffffff;
    background: var(--premium-accent);
    box-shadow: 0 14px 30px rgba(79, 124, 255, 0.22);
    transform: translateX(3px);
}

.dashboard-page .dashboard-topbar {
    position: relative;
    overflow: hidden;
}

.dashboard-page .dashboard-topbar::before {
    background:
        radial-gradient(circle at 18% 20%, rgba(79, 124, 255, 0.18), transparent 28%),
        radial-gradient(circle at 90% 15%, rgba(139, 92, 246, 0.14), transparent 28%);
}

.dashboard-page .dashboard-topbar h1 {
    max-width: 760px;
    font-size: clamp(2rem, 4.4vw, 4.25rem);
    line-height: 0.98;
}

.dashboard-page .student-identity-card {
    border-radius: 18px;
    border-color: rgba(99, 102, 241, 0.16);
    background: rgba(255, 255, 255, 0.58);
}

.dashboard-page .dashboard-hero-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(320px, 1.15fr);
}

.dashboard-page .dashboard-stat-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 12px;
}

.dashboard-page .dashboard-stat-card {
    min-height: 126px;
    padding: 16px;
}

.dashboard-page .dashboard-stat-card:hover,
.dashboard-page .quick-actions-grid a:hover,
.dashboard-page .achievement-badge:hover,
.dashboard-page .recommended-topic-card:hover {
    box-shadow: 0 24px 58px rgba(79, 124, 255, 0.15);
    transform: translateY(-5px);
}

.dashboard-page .dashboard-stat-card p {
    font-size: 0.8rem;
}

.dashboard-page .dashboard-stat-card strong {
    color: var(--premium-text);
    font-size: clamp(1.35rem, 2vw, 2rem);
}

.dashboard-page .dashboard-quote-card {
    color: #ffffff;
    background:
        linear-gradient(135deg, rgba(45, 63, 191, 0.9), rgba(118, 72, 205, 0.86)),
        #4f46e5;
}

.dashboard-page .dashboard-quote-card .eyebrow,
.dashboard-page .dashboard-quote-card p,
.dashboard-page .dashboard-quote-card cite {
    color: rgba(255, 255, 255, 0.92);
}

.dashboard-page .learning-progress-track,
.dashboard-page .xp-progress-track,
.dashboard-page .study-plan-progress-track,
.dashboard-page .weekly-summary-track,
.dashboard-page .challenge-progress-track {
    border-radius: 999px;
    background: rgba(99, 102, 241, 0.12);
}

.dashboard-page .learning-progress-track span,
.dashboard-page .xp-progress-track span,
.dashboard-page .study-plan-progress-track span,
.dashboard-page .weekly-summary-track span,
.dashboard-page .challenge-progress-track span {
    border-radius: inherit;
    background: var(--premium-accent);
}

.dashboard-page .gamification-panel {
    background:
        linear-gradient(145deg, rgba(255, 255, 255, 0.78), rgba(255, 255, 255, 0.5)),
        var(--premium-accent-soft);
}

.dashboard-page .continue-dashboard-panel,
.dashboard-page .recommendation-focus-card {
    background:
        linear-gradient(135deg, rgba(79, 124, 255, 0.9), rgba(139, 92, 246, 0.86)),
        #4f46e5;
}

.dashboard-page .continue-dashboard-panel .eyebrow,
.dashboard-page .continue-dashboard-panel h2,
.dashboard-page .continue-dashboard-panel p,
.dashboard-page .recommendation-focus-card .eyebrow,
.dashboard-page .recommendation-focus-card h2,
.dashboard-page .recommendation-focus-card p {
    color: rgba(255, 255, 255, 0.94);
}

.dashboard-page .quick-actions-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
}

.dashboard-page .quick-actions-grid a,
.dashboard-page .achievement-badge,
.dashboard-page .recommended-topic-card,
.dashboard-page .activity-card,
.dashboard-page .daily-challenge-card,
.dashboard-page .achievement-progress-card,
.dashboard-page .tutor-preview-card,
.dashboard-page .dashboard-empty-state {
    border-radius: 20px;
    border-color: rgba(255, 255, 255, 0.68);
    background: rgba(255, 255, 255, 0.58);
    box-shadow: 0 12px 32px rgba(31, 38, 72, 0.06);
}

.dashboard-page .quick-actions-grid span {
    border-radius: 17px;
    background: var(--premium-accent);
}

.dark-mode.home-page,
.dark-mode.dashboard-page {
    --premium-glass: rgba(17, 24, 39, 0.72);
    --premium-glass-strong: rgba(17, 24, 39, 0.86);
    --premium-border: rgba(127, 153, 255, 0.22);
    --premium-text: #f8fafc;
    --premium-muted: #b9c3d4;
    color: #f8fafc;
    background:
        radial-gradient(circle at 10% 8%, rgba(83, 120, 255, 0.24), transparent 30%),
        radial-gradient(circle at 86% 7%, rgba(168, 85, 247, 0.2), transparent 27%),
        radial-gradient(circle at 64% 38%, rgba(34, 197, 216, 0.1), transparent 24%),
        radial-gradient(circle at 78% 74%, rgba(34, 197, 216, 0.15), transparent 30%),
        linear-gradient(180deg, #080b16 0%, #111827 52%, #090d18 100%);
}

.dark-mode.home-page::after,
.dark-mode.dashboard-page::after {
    opacity: 0.075;
    filter: saturate(1.2) invert(0.08);
}

.dark-mode.home-page::after {
    opacity: 0.045;
}

.dark-mode.home-page .premium-home-nav,
.dark-mode.home-page .premium-home-hero,
.dark-mode.home-page .premium-learning-card,
.dark-mode.home-page .premium-stat-strip article,
.dark-mode.home-page .premium-section,
.dark-mode.home-page .premium-glass-section,
.dark-mode.home-page .feature-showcase-section,
.dark-mode.home-page .platform-highlights-card,
.dark-mode.home-page .why-study-card,
.dark-mode.home-page .project-team-card,
.dark-mode.home-page .about-card,
.dark-mode.home-page .account-motivation-card,
.dark-mode.home-page .guest-locked-card,
.dark-mode.dashboard-page .student-sidebar,
.dark-mode.dashboard-page .dashboard-topbar,
.dark-mode.dashboard-page .dashboard-panel,
.dark-mode.dashboard-page .dashboard-stat-card {
    border-color: rgba(127, 153, 255, 0.2);
    background:
        linear-gradient(145deg, rgba(17, 24, 39, 0.76), rgba(12, 18, 32, 0.54)),
        rgba(15, 23, 42, 0.68);
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.32);
}

.dark-mode.home-page .premium-brand,
.dark-mode.home-page .premium-brand-copy > span,
.dark-mode.home-page .premium-hero-copy h1,
.dark-mode.home-page .learning-card-header h2,
.dark-mode.home-page .premium-stat-strip strong,
.dark-mode.home-page .premium-action-card strong,
.dark-mode.home-page .section-heading h2,
.dark-mode.home-page .feature-card h3,
.dark-mode.home-page .why-study-grid h3,
.dark-mode.home-page .overview-panel h3,
.dark-mode.home-page .member-name,
.dark-mode.dashboard-page .dashboard-topbar h1,
.dark-mode.dashboard-page .dashboard-stat-card strong,
.dark-mode.dashboard-page .dashboard-section-heading h2 {
    color: #f8fafc;
}

.dark-mode.home-page .premium-hero-subtitle,
.dark-mode.home-page .premium-brand small,
.dark-mode.home-page .premium-stat-strip article div > span,
.dark-mode.home-page .premium-action-card small,
.dark-mode.dashboard-page .dashboard-stat-card p,
.dark-mode.dashboard-page .sidebar-brand span {
    color: #b9c3d4;
}

.dark-mode.home-page .premium-home-links a,
.dark-mode.home-page .premium-feature-chips span,
.dark-mode.home-page .subject-hints span,
.dark-mode.home-page .premium-learning-card label {
    color: #dce5f7;
}

.dark-mode.home-page .premium-home-links a:hover,
.dark-mode.home-page .premium-home-links a:focus-visible {
    color: #ffffff;
    background: rgba(127, 153, 255, 0.14);
}

.dark-mode.home-page .premium-home-links,
.dark-mode.home-page .premium-feature-chips span,
.dark-mode.home-page .subject-hints span,
.dark-mode.home-page .feature-list li,
.dark-mode.home-page .highlight-chip-grid span,
.dark-mode.home-page .tech-badges span,
.dark-mode.home-page .team-member,
.dark-mode.home-page .overview-panel,
.dark-mode.home-page .why-study-grid article,
.dark-mode.home-page .locked-feature-grid button,
.dark-mode.dashboard-page .sidebar-brand,
.dark-mode.dashboard-page .student-identity-card,
.dark-mode.dashboard-page .quick-actions-grid a,
.dark-mode.dashboard-page .achievement-badge,
.dark-mode.dashboard-page .recommended-topic-card,
.dark-mode.dashboard-page .activity-card,
.dark-mode.dashboard-page .daily-challenge-card,
.dark-mode.dashboard-page .achievement-progress-card,
.dark-mode.dashboard-page .tutor-preview-card,
.dark-mode.dashboard-page .dashboard-empty-state {
    border-color: rgba(127, 153, 255, 0.18);
    background: rgba(15, 23, 42, 0.58);
}

.dark-mode.home-page .premium-home-hero {
    background:
        linear-gradient(135deg, rgba(17, 24, 39, 0.82), rgba(12, 18, 32, 0.48)),
        radial-gradient(circle at 12% 82%, rgba(34, 197, 216, 0.18), transparent 34%),
        rgba(15, 23, 42, 0.68);
}

.dark-mode.home-page .textbook-helper {
    color: #a9b5c8;
}

.dark-mode.home-page .premium-feature-chips span:hover {
    box-shadow: 0 20px 44px rgba(127, 153, 255, 0.2);
}

.dark-mode.home-page .premium-ai-orbit {
    border-color: rgba(127, 153, 255, 0.26);
    background:
        linear-gradient(145deg, rgba(30, 41, 59, 0.88), rgba(15, 23, 42, 0.5)),
        var(--premium-accent);
    box-shadow: 0 32px 78px rgba(79, 124, 255, 0.24);
}

.dark-mode.home-page .premium-action-card,
.dark-mode.home-page .feature-card {
    border-color: rgba(127, 153, 255, 0.2);
    background:
        linear-gradient(145deg, rgba(23, 32, 51, 0.82), rgba(15, 23, 42, 0.58)),
        rgba(15, 23, 42, 0.72);
}

.dark-mode.home-page input,
.dark-mode.home-page select,
.dark-mode.dashboard-page input,
.dark-mode.dashboard-page select,
.dark-mode.dashboard-page textarea {
    border-color: rgba(127, 153, 255, 0.22);
    background: rgba(15, 23, 42, 0.78);
}

.dark-mode.home-page .autocomplete-menu {
    border-color: rgba(127, 153, 255, 0.22);
    background: rgba(15, 23, 42, 0.94);
}

.dark-mode.home-page .secondary-link,
.dark-mode.dashboard-page .secondary-link {
    color: #e5edff;
    background: rgba(15, 23, 42, 0.72);
}

@media (max-width: 1180px) {
    .premium-stat-strip,
    .dashboard-page .dashboard-stat-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .premium-action-grid,
    .dashboard-page .quick-actions-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .home-page .premium-home-hero {
        grid-template-columns: 1fr;
        min-height: auto;
    }

    .premium-hero-copy {
        padding-top: 8px;
    }

    .premium-ai-orbit {
        width: clamp(98px, 12vw, 126px);
        height: clamp(98px, 12vw, 126px);
    }
}

@media (max-width: 880px) {
    .home-page .premium-home-nav {
        position: relative;
        top: auto;
        grid-template-columns: 1fr;
        justify-items: stretch;
        min-height: auto;
    }

    .premium-brand {
        grid-template-columns: 68px minmax(0, 1fr);
    }

    .home-page .premium-school-mark {
        width: 68px;
        height: 68px;
        border-radius: 18px;
    }

    .home-page .premium-school-mark .school-logo {
        height: 58px;
    }

    .premium-brand strong {
        font-size: clamp(1.55rem, 5vw, 1.85rem);
    }

    .premium-brand-copy > span {
        font-size: 0.82rem;
    }

    .premium-home-links {
        justify-content: flex-start;
        overflow-x: auto;
    }

    .home-page .premium-header-actions {
        justify-self: stretch;
    }

    .home-page .auth-nav {
        justify-content: flex-start;
    }

    .home-page .premium-home-hero {
        padding: 26px;
        border-radius: 24px;
        margin-top: 24px;
    }

    .premium-hero-copy {
        padding-top: 18px;
    }

    .premium-hero-copy h1 {
        font-size: clamp(2.35rem, 9vw, 4rem);
        line-height: 1.03;
    }

    .dashboard-page .dashboard-hero-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 620px) {
    .home-page .premium-home-container,
    .dashboard-page .dashboard-shell {
        width: min(100% - 20px, 1120px);
    }

    .home-page .premium-home-hero,
    .home-page .premium-learning-card,
    .premium-section,
    .premium-glass-section,
    .home-page .feature-showcase-section,
    .home-page .platform-highlights-card,
    .home-page .why-study-card,
    .home-page .project-team-card,
    .home-page .about-card,
    .home-page .account-motivation-card,
    .home-page .guest-locked-card {
        padding: 20px;
        border-radius: 22px;
    }

    .home-page .premium-home-hero {
        background:
            linear-gradient(135deg, rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0.38)),
            var(--premium-accent-soft);
        gap: 24px;
    }

    .premium-brand-copy > span {
        overflow: visible;
        line-height: 1.25;
        text-overflow: clip;
        white-space: normal;
    }

    .dark-mode.home-page .premium-home-hero {
        background:
            linear-gradient(135deg, rgba(17, 24, 39, 0.82), rgba(12, 18, 32, 0.5)),
            radial-gradient(circle at 12% 82%, rgba(34, 197, 216, 0.16), transparent 34%),
            rgba(15, 23, 42, 0.68);
    }

    .home-page .premium-learning-card .form-grid,
    .premium-stat-strip,
    .premium-action-grid,
    .dashboard-page .dashboard-stat-grid,
    .dashboard-page .quick-actions-grid {
        grid-template-columns: 1fr;
    }

    .learning-card-header,
    .premium-hero-actions,
    .premium-hero-actions .button-link {
        width: 100%;
    }

    .learning-card-header {
        display: grid;
        gap: 14px;
        margin-bottom: 22px;
    }

    .premium-hero-copy {
        gap: 18px;
        padding-top: 4px;
    }

    .premium-hero-copy h1 {
        font-size: clamp(2.15rem, 10.5vw, 3rem);
        line-height: 1.04;
    }

    .premium-hero-copy h1 span {
        white-space: normal;
    }

    .premium-hero-subtitle {
        font-size: 0.95rem;
        line-height: 1.65;
    }

    .home-page .premium-feature-chips span {
        min-height: 36px;
        padding: 7px 10px;
        font-size: 0.78rem;
    }

    .learning-card-header h2 {
        font-size: clamp(1.55rem, 8vw, 2rem);
    }

    .learning-card-visual {
        justify-self: center;
        justify-items: center;
    }

    .premium-ai-orbit {
        position: relative;
        top: auto;
        right: auto;
        justify-self: center;
        width: min(46vw, 124px);
        height: min(46vw, 124px);
        margin: 0 auto;
    }

    .premium-action-card {
        min-height: 132px;
    }
}

@keyframes premiumFadeUp {
    from {
        opacity: 0;
        transform: translateY(18px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes premiumSlideUp {
    from {
        opacity: 0;
        transform: translateY(26px) scale(0.985);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes premiumFloat {
    0%,
    100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-10px) rotate(1.2deg);
    }
}