:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-soft: #dbeafe;
    --success: #16a34a;
    --warning: #f59e0b;
    --danger: #dc2626;
    --text: #0f172a;
    --muted: #64748b;
    --line: #e2e8f0;
    --surface: #ffffff;
    --bg: #f8fafc;
    --shadow: 0 18px 45px rgba(15, 23, 42, .08);
}

* { box-sizing: border-box; }
body {
    margin: 0;
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.55;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; }
input, select, textarea, button { font: inherit; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    height: 72px;
    display: flex;
    align-items: center;
    gap: 28px;
    padding: 0 clamp(20px, 4vw, 56px);
    background: rgba(255, 255, 255, .9);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(16px);
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    font-weight: 800;
    color: var(--text);
}
.brand-mark {
    display: grid;
    place-items: center;
    width: 26px;
    height: 26px;
    border-radius: 7px;
    color: #fff;
    background: linear-gradient(135deg, var(--primary), #0ea5e9);
    font-size: 14px;
}
.primary-nav { flex: 1; }
.primary-nav ul {
    display: flex;
    justify-content: center;
    gap: 28px;
    list-style: none;
    padding: 0;
    margin: 0;
}
.primary-nav a {
    color: #334155;
    font-size: 14px;
    font-weight: 600;
}
.primary-nav a:hover { color: var(--primary); }
.header-actions {
    display: flex;
    gap: 10px;
}
.mobile-menu-toggle { display: none; }

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: 0 18px;
    border: 1px solid transparent;
    border-radius: 8px;
    font-weight: 700;
    font-size: 14px;
    cursor: pointer;
}
.button-primary { color: #fff; background: var(--primary); box-shadow: 0 10px 22px rgba(37, 99, 235, .22); }
.button-primary:hover { background: var(--primary-dark); }
.button-secondary { color: var(--primary); background: #fff; border-color: #bfdbfe; }
.button-ghost { color: var(--primary); background: transparent; border-color: #bfdbfe; }
.button-full { width: 100%; }

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(320px, .95fr);
    gap: 48px;
    align-items: center;
    min-height: 540px;
    padding: 56px clamp(20px, 5vw, 72px) 34px;
    background: radial-gradient(circle at 80% 20%, #e0f2fe 0, transparent 32%), linear-gradient(180deg, #fff 0, #f8fafc 100%);
}
.eyebrow {
    display: inline-block;
    color: var(--primary);
    font-weight: 800;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0;
}
.hero h1 {
    max-width: 680px;
    margin: 12px 0 16px;
    font-size: clamp(34px, 5vw, 60px);
    line-height: 1.04;
    letter-spacing: 0;
}
.hero p {
    max-width: 600px;
    color: var(--muted);
    font-size: 18px;
}
.hero-search, .filter-panel, .newsletter-form {
    display: flex;
    gap: 12px;
}
.hero-search {
    max-width: 640px;
    margin-top: 30px;
    padding: 8px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: var(--shadow);
}
.hero-search input, .filter-panel input, .filter-panel select, .newsletter-form input, .auth-panel input, .auth-panel textarea, .builder-form input, .builder-form select, .assignment-form input, .assignment-form select {
    width: 100%;
    min-height: 42px;
    padding: 0 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--text);
    background: #fff;
}
.hero-search input { border: 0; }
.hero-visual {
    position: relative;
    min-height: 390px;
}
.student-illustration {
    position: absolute;
    inset: 40px 40px 20px 60px;
    border-radius: 34px;
    background: linear-gradient(145deg, #dbeafe, #f8fafc);
    box-shadow: var(--shadow);
}
.student-head {
    position: absolute;
    top: 70px;
    left: 48%;
    width: 76px;
    height: 76px;
    border-radius: 50%;
    background: #ffd7b5;
    box-shadow: inset 0 14px #0f172a;
}
.student-body {
    position: absolute;
    top: 140px;
    left: 39%;
    width: 150px;
    height: 132px;
    border-radius: 56px 56px 20px 20px;
    background: #2563eb;
}
.laptop {
    position: absolute;
    left: 18%;
    bottom: 70px;
    width: 210px;
    height: 128px;
    border-radius: 14px;
    background: #1e293b;
    transform: skewX(-6deg);
}
.math-card {
    position: absolute;
    z-index: 2;
    padding: 14px 18px;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: rgba(255, 255, 255, .88);
    color: var(--primary);
    font-weight: 800;
    box-shadow: var(--shadow);
}
.formula-card { top: 26px; left: 24px; }
.chart-card-mini { right: 10px; bottom: 38px; }

.feature-strip, .section, .page-shell {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
}
.feature-strip {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
    padding: 28px 0;
}
.feature-strip div, .exam-card, .topic-card, .grade-card, .exam-row, .content-card, .detail-main, .detail-sidebar, .score-card, .result-panel, .chart-panel, .solution-card, .profile-header, .dashboard-menu, .dashboard-main, .auth-card, .table-card, .stat-card, .filter-panel, .builder-panel, .topic-progress-panel, .wrong-card, .roadmap-hero, .roadmap-item, .recommend-panel, .podium-card, .rank-card, .teacher-hero, .classroom-card, .assignment-form, .insight-panel {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: 0 10px 26px rgba(15, 23, 42, .04);
}
.feature-strip div { padding: 18px; }
.feature-strip span, .muted, .exam-meta, .stat-card span { color: var(--muted); font-size: 13px; }

.section, .page-shell { padding: 34px 0; }
.section-heading, .page-title-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 18px;
}
.section-heading h2, .page-title-row h1 { margin: 0; }
.exam-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}
.exam-card { padding: 18px; }
.exam-card h3 { min-height: 56px; margin: 12px 0; font-size: 17px; line-height: 1.35; }
.card-topline, .exam-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
}
.badge {
    display: inline-flex;
    align-items: center;
    min-height: 24px;
    padding: 0 9px;
    border-radius: 999px;
    color: var(--primary);
    background: var(--primary-soft);
    font-size: 12px;
    font-weight: 800;
}
.badge-hot { color: #fff; background: #ef4444; }
.grade-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 14px; }
.grade-card { display: grid; place-items: center; gap: 8px; padding: 18px 10px; }
.grade-card span {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    color: #fff;
    background: var(--primary);
    font-weight: 800;
}
.topic-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.topic-card { padding: 18px; }
.topic-card span { display: block; color: var(--muted); font-size: 13px; margin-top: 4px; }

.filter-panel {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr) auto;
    padding: 16px;
    margin-bottom: 18px;
}
.exam-list { display: grid; gap: 12px; }
.exam-row {
    display: grid;
    grid-template-columns: 46px 1fr auto;
    align-items: center;
    gap: 16px;
    padding: 16px;
}
.exam-row h2 { margin: 0 0 8px; font-size: 17px; }
.file-icon {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 10px;
    color: #fff;
    background: var(--primary);
    font-weight: 800;
}

.detail-layout, .solution-layout, .dashboard-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 20px;
}
.detail-main, .detail-sidebar { padding: 24px; }
.detail-main h1 { font-size: 38px; line-height: 1.12; margin: 10px 0; }
.large { font-size: 15px; margin-bottom: 20px; }
.content-body { color: #334155; }
.matrix-grid, .stat-grid, .result-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}
.matrix-grid div, .stat-card { padding: 16px; }
.matrix-grid span, .stat-card strong { display: block; color: var(--primary); font-size: 24px; font-weight: 800; }
.detail-sidebar { display: grid; gap: 14px; align-content: start; }

.exam-taking-shell { width: min(1280px, calc(100% - 40px)); margin: 0 auto; padding: 20px 0 40px; }
.exam-taking-header {
    display: grid;
    grid-template-columns: 1fr auto auto;
    align-items: center;
    gap: 18px;
    margin-bottom: 18px;
}
.exam-taking-header h1 { margin: 0; font-size: 24px; }
.timer { color: var(--danger); font-weight: 800; }
.exam-workspace {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 18px;
}
.question-panel, .question-map {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 20px;
}
.question-slide { display: none; }
.question-slide.is-active { display: block; }
.question-count { color: var(--primary); font-weight: 800; margin-bottom: 12px; }
.geometry-box { padding: 20px; border: 1px dashed #cbd5e1; border-radius: 10px; font-family: monospace; white-space: pre; }
.answer-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin: 24px 0; }
.answer-option {
    display: flex;
    gap: 10px;
    align-items: center;
    min-height: 58px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 10px;
    cursor: pointer;
}
.answer-option:has(input:checked) { border-color: var(--primary); background: #eff6ff; }
.question-actions, .action-row { display: flex; justify-content: space-between; gap: 12px; }
.question-map h2 { margin-top: 0; font-size: 18px; }
.legend { display: flex; gap: 8px; align-items: center; color: var(--muted); font-size: 13px; margin-bottom: 14px; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: #cbd5e1; }
.dot.done { background: var(--success); }
.dot.mark { background: var(--warning); }
.question-buttons { display: grid; grid-template-columns: repeat(5, 1fr); gap: 9px; }
.question-buttons button {
    height: 38px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    cursor: pointer;
}
.question-buttons button.is-active { color: #fff; background: var(--primary); border-color: var(--primary); }
.question-buttons button.is-done { color: #fff; background: var(--success); border-color: var(--success); }
.question-buttons button.is-marked { color: #fff; background: var(--warning); border-color: var(--warning); }

.result-grid { grid-template-columns: 1fr 1.2fr 1fr 1fr 1.4fr; }
.score-card, .result-panel, .chart-panel { padding: 20px; }
.score-card strong { color: var(--success); font-size: 56px; line-height: 1; }
.score-card em { font-style: normal; color: var(--muted); }
.result-panel h2, .chart-panel h2, .table-card h2 { margin-top: 0; font-size: 18px; }
dl { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
dt { color: var(--muted); }
dd { margin: 0; font-weight: 700; }
.result-numbers { display: grid; gap: 8px; font-weight: 800; }
.success { color: var(--success); }
.danger { color: var(--danger); }
.warning { color: var(--warning); }
.donut {
    display: grid;
    place-items: center;
    min-height: 180px;
    background: radial-gradient(circle, #fff 0 38%, transparent 39%), conic-gradient(var(--success) 0 76%, var(--danger) 76% 88%, var(--warning) 88% 100%);
}
.donut span { font-size: 34px; font-weight: 800; }
.line-chart {
    height: 120px;
    background: linear-gradient(160deg, transparent 48%, #2563eb 49% 51%, transparent 52%), repeating-linear-gradient(0deg, #fff, #fff 23px, #e2e8f0 24px);
}

.solution-layout { grid-template-columns: 220px minmax(0, 1fr); }
.solution-nav {
    position: sticky;
    top: 92px;
    align-self: start;
    display: grid;
    gap: 8px;
    padding: 16px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 12px;
}
.solution-nav h2 { margin: 0 0 8px; font-size: 16px; }
.solution-nav a { padding: 9px 10px; border-radius: 8px; color: var(--muted); }
.solution-nav a.is-active, .solution-nav a:hover { color: var(--primary); background: #eff6ff; }
.solution-card { padding: 22px; margin-bottom: 16px; }
.answer-review { display: flex; gap: 16px; margin: 14px 0; }

.profile-header {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 18px;
    padding: 22px;
    margin-bottom: 18px;
}
.avatar {
    display: grid;
    place-items: center;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    color: #fff;
    background: linear-gradient(135deg, #f97316, #2563eb);
    font-size: 28px;
    font-weight: 800;
}
.profile-stats { display: grid; grid-template-columns: repeat(3, 140px); gap: 12px; }
.profile-stats div { padding: 14px; border: 1px solid var(--line); border-radius: 10px; text-align: center; }
.profile-stats strong { display: block; color: var(--primary); font-size: 22px; }
.profile-stats span { color: var(--muted); font-size: 12px; }
.dashboard-layout { grid-template-columns: 220px minmax(0, 1fr); }
.dashboard-menu { display: grid; align-content: start; gap: 6px; padding: 14px; }
.dashboard-menu a { padding: 10px 12px; border-radius: 8px; color: var(--muted); font-weight: 700; }
.dashboard-menu a.is-active { color: var(--primary); background: #eff6ff; }
.dashboard-main { padding: 20px; }
.table-card { padding: 20px; margin-top: 18px; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 10px; border-bottom: 1px solid var(--line); text-align: left; }
th { color: var(--muted); font-size: 13px; }

.auth-shell { width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding: 44px 0; }
.auth-card { display: grid; grid-template-columns: 1fr 1.2fr 1fr; overflow: hidden; }
.auth-panel { padding: 32px; }
.auth-panel h1 { margin-bottom: 6px; }
.auth-panel label { display: grid; gap: 6px; margin-bottom: 12px; font-weight: 700; }
.auth-visual { position: relative; min-height: 360px; background: #eff6ff; }
.auth-visual .student-illustration { inset: 34px; }
.auth-links { display: flex; justify-content: space-between; gap: 10px; margin-top: 12px; font-size: 14px; color: var(--primary); font-weight: 700; }

.site-footer {
    margin-top: 30px;
    padding: 40px clamp(20px, 5vw, 72px) 22px;
    color: #cbd5e1;
    background: #082f75;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 28px;
}
.site-footer h3 { color: #fff; font-size: 16px; }
.site-footer a { display: block; color: #dbeafe; margin: 8px 0; }
.brand-footer { color: #fff; }
.footer-bottom { margin-top: 28px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.16); text-align: center; font-size: 13px; }
.newsletter-form { align-items: center; }
.newsletter-form input { border-color: rgba(255,255,255,.2); }

.admin-links { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.admin-links a { padding: 16px; border: 1px solid var(--line); border-radius: 10px; color: var(--primary); font-weight: 800; }
.empty-state { padding: 70px 20px; text-align: center; }

.no-x { width: 100%; padding-left: 0; padding-right: 0; }
.practice-builder, .assignment-layout, .report-grid, .leaderboard-layout, .roadmap-layout {
    display: grid;
    grid-template-columns: 360px minmax(0, 1fr);
    gap: 20px;
}
.builder-panel, .topic-progress-panel, .assignment-form, .insight-panel, .rank-card {
    padding: 22px;
}
.builder-panel h2, .topic-progress-panel h2, .assignment-form h2, .insight-panel h2 { margin-top: 0; }
.builder-form, .assignment-form {
    display: grid;
    gap: 14px;
    align-content: start;
}
.builder-form label, .assignment-form label {
    display: grid;
    gap: 7px;
    color: #334155;
    font-weight: 700;
}
.segmented-control {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    padding: 5px;
    background: #eef2ff;
    border-radius: 10px;
}
.segmented-control button {
    min-height: 36px;
    border: 0;
    border-radius: 8px;
    color: #475569;
    background: transparent;
    font-weight: 800;
    cursor: pointer;
}
.segmented-control button.is-active {
    color: var(--primary);
    background: #fff;
    box-shadow: 0 6px 16px rgba(15, 23, 42, .08);
}
.segmented-control.compact { width: 260px; }
.progress-row {
    display: grid;
    grid-template-columns: 130px minmax(0, 1fr) 48px;
    gap: 12px;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
}
.progress-row:last-child { border-bottom: 0; }
.progress-track {
    height: 9px;
    overflow: hidden;
    border-radius: 999px;
    background: #e2e8f0;
}
.progress-track i {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--primary), #14b8a6);
}
.wrong-list { display: grid; gap: 14px; }
.wrong-card {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 18px;
    align-items: center;
    padding: 18px;
}
.wrong-card h2 { margin: 10px 0 6px; font-size: 18px; }
.wrong-card p { color: var(--muted); margin-top: 0; }
.wrong-actions { display: grid; gap: 10px; min-width: 150px; }

.roadmap-hero, .teacher-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 18px;
    padding: 28px;
    margin-bottom: 20px;
}
.roadmap-hero h1, .teacher-hero h1 { margin: 8px 0; font-size: 34px; line-height: 1.12; }
.roadmap-hero p, .teacher-hero p { color: var(--muted); max-width: 620px; }
.goal-card {
    min-width: 180px;
    padding: 20px;
    border-radius: 12px;
    color: #fff;
    background: linear-gradient(135deg, var(--primary), #0f766e);
}
.goal-card span { opacity: .85; }
.goal-card strong { display: block; font-size: 44px; line-height: 1; margin: 8px 0; }
.roadmap-layout { grid-template-columns: minmax(0, 1fr) 300px; }
.roadmap-timeline { display: grid; gap: 14px; }
.roadmap-item {
    display: grid;
    grid-template-columns: 28px minmax(0, 1fr) auto;
    gap: 14px;
    align-items: center;
    padding: 18px;
}
.timeline-dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 6px var(--primary-soft);
}
.roadmap-item h2 { margin: 0 0 4px; font-size: 18px; }
.roadmap-item p { margin: 0 0 10px; color: var(--muted); }
.recommend-panel {
    align-self: start;
    display: grid;
    gap: 10px;
    padding: 20px;
}
.recommend-panel h2 { margin: 0 0 8px; font-size: 18px; }
.recommend-panel a {
    padding: 13px;
    border: 1px solid var(--line);
    border-radius: 10px;
    color: var(--primary);
    font-weight: 800;
    background: #fff;
}

.podium-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    align-items: end;
    margin-bottom: 20px;
}
.podium-card {
    padding: 22px;
    text-align: center;
}
.podium-card span {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    margin: 0 auto 12px;
    border-radius: 50%;
    color: #fff;
    background: var(--primary);
    font-weight: 800;
}
.podium-card.first { min-height: 180px; border-color: #facc15; }
.podium-card.second { min-height: 150px; }
.podium-card.third { min-height: 135px; }
.leaderboard-layout { grid-template-columns: minmax(0, 1fr) 260px; }
.rank-card { align-self: start; }
.rank-card strong {
    display: block;
    color: var(--primary);
    font-size: 54px;
    line-height: 1;
    margin: 10px 0;
}
.rank-card p { color: var(--muted); }

.classroom-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-top: 20px;
}
.classroom-card { padding: 18px; }
.classroom-card h2 { margin: 12px 0; font-size: 20px; }
.assignment-layout { grid-template-columns: 340px minmax(0, 1fr); }
.check-row {
    display: flex !important;
    grid-template-columns: none !important;
    align-items: center;
    gap: 10px !important;
}
.check-row input { width: auto; min-height: auto; }
.report-grid { grid-template-columns: minmax(0, 1fr) 310px; }
.insight-panel { align-self: start; }
.insight-item {
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
}
.insight-item strong, .insight-item span { display: block; }
.insight-item span { color: var(--muted); margin-top: 4px; }

@media (max-width: 980px) {
    .site-header { height: auto; min-height: 68px; flex-wrap: wrap; }
    .mobile-menu-toggle { display: inline-flex; margin-left: auto; }
    .primary-nav, .header-actions { display: none; width: 100%; }
    body.menu-open .primary-nav, body.menu-open .header-actions { display: flex; }
    .primary-nav ul { flex-direction: column; align-items: flex-start; gap: 12px; padding-bottom: 10px; }
    .hero, .detail-layout, .exam-workspace, .solution-layout, .dashboard-layout, .auth-card, .practice-builder, .assignment-layout, .report-grid, .leaderboard-layout, .roadmap-layout { grid-template-columns: 1fr; }
    .feature-strip, .exam-grid, .grade-grid, .topic-grid, .matrix-grid, .stat-grid, .result-grid, .footer-grid, .classroom-grid, .podium-grid { grid-template-columns: repeat(2, 1fr); }
    .filter-panel { grid-template-columns: 1fr 1fr; }
    .profile-header { grid-template-columns: auto 1fr; }
    .profile-stats { grid-column: 1 / -1; grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 640px) {
    .hero { padding-top: 32px; }
    .hero-search, .question-actions, .action-row { flex-direction: column; }
    .feature-strip, .exam-grid, .grade-grid, .topic-grid, .filter-panel, .matrix-grid, .stat-grid, .result-grid, .footer-grid, .answer-grid, .admin-links, .classroom-grid, .podium-grid { grid-template-columns: 1fr; }
    .exam-row { grid-template-columns: 42px 1fr; }
    .exam-row .button { grid-column: 1 / -1; }
    .profile-header, .profile-stats { grid-template-columns: 1fr; text-align: center; }
    .exam-taking-header { grid-template-columns: 1fr; }
    .wrong-card, .roadmap-item, .roadmap-hero, .teacher-hero { grid-template-columns: 1fr; }
    .segmented-control, .segmented-control.compact { width: 100%; grid-template-columns: 1fr; }
    .progress-row { grid-template-columns: 1fr; }
}

.parent-hero, .pricing-hero, .student-switcher, .pricing-card, .checkout-form, .order-summary, .notification-card, .blog-card, .report-summary div {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: 0 10px 26px rgba(15, 23, 42, .04);
}

.parent-hero, .pricing-hero {
    padding: 34px;
    margin-bottom: 18px;
}
.parent-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 18px;
}
.parent-hero h1, .pricing-hero h1 {
    margin: 8px 0;
    font-size: 38px;
    line-height: 1.1;
}
.parent-hero p, .pricing-hero p {
    color: var(--muted);
    max-width: 660px;
}
.student-switcher {
    display: flex;
    gap: 10px;
    align-items: center;
    padding: 12px;
    margin-bottom: 18px;
}
.student-switcher button, .student-switcher a {
    min-height: 38px;
    padding: 0 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    color: var(--muted);
    font-weight: 800;
}
.student-switcher button.is-active {
    color: #fff;
    background: var(--primary);
    border-color: var(--primary);
}
.parent-grid, .notification-layout, .checkout-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 20px;
}
.report-summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 20px;
}
.report-summary div { padding: 20px; }
.report-summary span { color: var(--muted); }
.report-summary strong {
    display: block;
    color: var(--primary);
    font-size: 38px;
    line-height: 1;
    margin: 8px 0;
}

.pricing-hero { text-align: center; }
.pricing-hero p {
    margin-left: auto;
    margin-right: auto;
}
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}
.pricing-card {
    display: grid;
    gap: 16px;
    align-content: start;
    padding: 24px;
}
.pricing-card h2 {
    margin: 0;
    font-size: 24px;
}
.price strong {
    color: var(--primary);
    font-size: 42px;
}
.price span {
    color: var(--muted);
    margin-left: 4px;
}
.pricing-card ul {
    display: grid;
    gap: 10px;
    padding: 0;
    margin: 0;
    list-style: none;
}
.pricing-card li::before {
    content: "✓";
    color: var(--success);
    font-weight: 800;
    margin-right: 8px;
}
.checkout-layout { grid-template-columns: minmax(0, 1fr) 360px; }
.checkout-form, .order-summary {
    display: grid;
    gap: 14px;
    align-content: start;
    padding: 24px;
}
.checkout-form label {
    display: grid;
    gap: 7px;
    color: #334155;
    font-weight: 700;
}
.checkout-form input, .checkout-form select {
    width: 100%;
    min-height: 42px;
    padding: 0 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--text);
    background: #fff;
}
.summary-row, .summary-total {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
}
.summary-total {
    color: var(--primary);
    font-size: 22px;
    font-weight: 800;
    border-bottom: 0;
}

.notification-list {
    display: grid;
    gap: 12px;
}
.notification-card { padding: 18px; }
.notification-card h2 {
    margin: 10px 0 6px;
    font-size: 18px;
}
.notification-card p {
    color: var(--muted);
    margin-top: 0;
}
.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}
.blog-card {
    overflow: hidden;
}
.blog-card img, .blog-placeholder {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    background: linear-gradient(135deg, #dbeafe, #fef3c7);
}
.blog-card div:last-child { padding: 18px; }
.blog-card h2 {
    margin: 8px 0;
    font-size: 20px;
    line-height: 1.3;
}
.blog-card p { color: var(--muted); }

@media print {
    .site-header, .site-footer, .button { display: none !important; }
    body { background: #fff; }
    .page-shell { width: 100%; padding: 0; }
    .table-card, .insight-panel, .report-summary div {
        box-shadow: none;
        break-inside: avoid;
    }
}

@media (max-width: 980px) {
    .parent-grid, .notification-layout, .checkout-layout, .parent-hero {
        grid-template-columns: 1fr;
    }
    .pricing-grid, .blog-grid, .report-summary {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .pricing-grid, .blog-grid, .report-summary {
        grid-template-columns: 1fr;
    }
    .student-switcher {
        flex-direction: column;
        align-items: stretch;
    }
}

.system-hero, .contact-form, .faq-item, .system-state, .shortcode-stats, .inline-exam-search {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 12px;
    box-shadow: 0 10px 26px rgba(15, 23, 42, .04);
}
.system-hero {
    padding: 34px;
    margin-bottom: 18px;
}
.system-hero h1 {
    margin: 8px 0;
    font-size: 38px;
    line-height: 1.1;
}
.system-hero p {
    color: var(--muted);
    max-width: 680px;
}
.faq-list {
    display: grid;
    gap: 12px;
}
.faq-item {
    padding: 18px 20px;
}
.faq-item summary {
    color: var(--text);
    font-weight: 800;
    cursor: pointer;
}
.faq-item p {
    color: var(--muted);
    margin-bottom: 0;
}
.contact-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 420px;
    gap: 20px;
}
.contact-form {
    display: grid;
    gap: 14px;
    align-content: start;
    padding: 24px;
}
.contact-form label {
    display: grid;
    gap: 7px;
    color: #334155;
    font-weight: 700;
}
.contact-form input, .contact-form select, .contact-form textarea {
    width: 100%;
    padding: 0 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--text);
    background: #fff;
}
.contact-form input, .contact-form select { min-height: 42px; }
.contact-form textarea {
    padding-top: 12px;
    resize: vertical;
}
.contact-info {
    display: grid;
    gap: 5px;
    margin-top: 24px;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #f8fafc;
}
.contact-info a {
    color: var(--primary);
    font-weight: 800;
}
.legal-page .content-card {
    max-width: 860px;
    margin: 0 auto;
    padding: 34px;
}
.system-state {
    display: grid;
    justify-items: center;
    gap: 14px;
    max-width: 720px;
    margin: 50px auto;
    padding: 60px 28px;
    text-align: center;
}
.system-state span {
    color: var(--primary);
    font-size: 64px;
    font-weight: 800;
    line-height: 1;
}
.system-state h1 {
    margin: 0;
    font-size: 36px;
    line-height: 1.12;
}
.system-state p {
    color: var(--muted);
    max-width: 520px;
}
.action-row.center {
    justify-content: center;
}
.maintenance-body {
    min-height: 100vh;
    background: radial-gradient(circle at 20% 10%, #dbeafe, transparent 32%), var(--bg);
}
.maintenance-page {
    display: grid;
    place-items: center;
    min-height: 100vh;
    padding: 24px;
}
.shortcode-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    padding: 16px;
}
.shortcode-stats div {
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 10px;
    text-align: center;
}
.shortcode-stats strong {
    display: block;
    color: var(--primary);
    font-size: 28px;
}
.shortcode-stats span {
    color: var(--muted);
    font-size: 13px;
}
.inline-exam-search {
    display: flex;
    gap: 10px;
    padding: 10px;
}
.inline-exam-search input {
    width: 100%;
    min-height: 42px;
    padding: 0 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
}

.submit-feedback {
    margin: 14px 0 0;
    padding: 12px 14px;
    border: 1px solid #bfdbfe;
    border-radius: 8px;
    color: var(--primary);
    background: #eff6ff;
    font-weight: 700;
}
.report-question-form {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 220px auto;
    gap: 10px;
    align-items: start;
    margin-top: 18px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
}
.report-question-form textarea, .report-question-form input {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--text);
    background: #fff;
}
.report-question-form textarea {
    padding: 10px 12px;
    resize: vertical;
}
.report-question-form input {
    min-height: 40px;
    padding: 0 12px;
}
.report-question-form span {
    grid-column: 1 / -1;
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
}
.analytics-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 20px;
    margin-top: 18px;
}

@media (max-width: 980px) {
    .contact-layout {
        grid-template-columns: 1fr;
    }
    .shortcode-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    .analytics-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .shortcode-stats {
        grid-template-columns: 1fr;
    }
    .inline-exam-search {
        flex-direction: column;
    }
    .report-question-form {
        grid-template-columns: 1fr;
    }
}