:root {
    --primary: #0a4d8c;
    --primary-light: #1a75c5;
    --primary-dark: #083a6b;
    --accent-bg: #f0f6fc;
    --text: #333333;
    --muted: #6c757d;
    --border: #dee2e6;
    --success: #198754;
    --danger: #dc3545;
    --warning: #ffc107;
    --radius: 8px;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Roboto', sans-serif;
    color: var(--text);
    background: #fff;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container { max-width: 1140px; margin: 0 auto; padding: 0 20px; width: 100%; }

.site-header {
    background: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,.08);
    position: sticky;
    top: 0;
    z-index: 100;
}

.site-header-wrap {
    padding: .65rem 0 .55rem;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 48px;
    gap: .75rem 1rem;
    position: relative;
}

.header-stats-bar {
    display: flex;
    justify-content: center;
    padding: .45rem 0 .15rem;
    border-top: 1px solid #eef2f6;
    margin-top: .45rem;
}

.header-stats-inner {
    display: block;
    width: 100%;
    max-width: 100%;
    padding: .3rem .65rem;
    font-size: .72rem;
    font-weight: 500;
    color: var(--muted);
    background: #f8fbff;
    border: 1px solid var(--border);
    border-radius: 999px;
    text-align: center;
    line-height: 1.35;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nav-menu-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    margin-left: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    color: var(--primary);
    font-size: 1.1rem;
    cursor: pointer;
    flex-shrink: 0;
}

.nav-menu-toggle:hover {
    background: var(--accent-bg);
    border-color: var(--primary-light);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (min-width: 960px) {
    .site-header-wrap {
        padding: 0;
        position: relative;
    }

    .header-inner {
        min-height: 64px;
    }

    .site-header--with-stats .header-inner {
        min-height: 68px;
    }

    .site-header--with-stats .header-stats-bar {
        display: flex;
    }

    .header-stats-bar {
        position: absolute;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
        width: min(52vw, 36rem);
        padding: 0;
        margin: 0;
        border-top: none;
        pointer-events: none;
    }

    .header-stats-inner {
        width: auto;
        max-width: 100%;
        font-size: .78rem;
        padding: .35rem .85rem;
    }
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex-wrap: wrap;
}

@media (max-width: 959px) {
    .nav-menu-toggle {
        display: inline-flex;
    }

    .main-nav {
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        width: 100%;
        order: 4;
        padding: .5rem 0 .25rem;
        border-top: 1px solid var(--border);
        margin-top: .35rem;
    }

    .main-nav.is-open {
        display: flex;
    }

    .main-nav > a,
    .main-nav > .nav-dropdown,
    .main-nav > .nav-user {
        width: 100%;
        padding: .55rem 0;
        border-bottom: 1px solid #eef2f6;
    }

    .main-nav > a:last-child,
    .main-nav > .nav-user:last-child {
        border-bottom: none;
    }

    .main-nav .nav-auth-btn {
        margin: .35rem 0 0;
        text-align: center;
        width: 100%;
    }

    .main-nav .nav-dropdown-menu,
    .main-nav .nav-user-menu {
        position: static;
        display: block;
        box-shadow: none;
        border: none;
        padding: .25rem 0 0 1rem;
        min-width: 0;
    }

    .main-nav .nav-dropdown:hover .nav-dropdown-menu,
    .main-nav .nav-user:hover .nav-user-menu {
        display: block;
    }

    .header-inner {
        flex-wrap: wrap;
    }

    .logo {
        font-size: 1.35rem;
    }
}

.main-nav > a {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
}

.main-nav > a.active,
.main-nav > a:hover { color: var(--primary-light); }

.nav-dropdown { position: relative; }
.nav-dropdown-toggle,
.nav-user-toggle {
    background: none;
    border: none;
    font: inherit;
    cursor: pointer;
    color: var(--text);
    font-weight: 500;
}

.nav-dropdown-menu {
    display: none;
    position: absolute;
    right: 0;
    top: 100%;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    min-width: 180px;
    z-index: 200;
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-user:hover .nav-user-menu { display: block; }

.nav-dropdown-menu a {
    display: block;
    padding: 10px 16px;
    color: var(--text);
    text-decoration: none;
}

.nav-dropdown-menu a:hover { background: var(--accent-bg); }

.site-main { flex: 1; padding: 2rem 0; }
.site-footer {
    background: var(--accent-bg);
    padding: 1.5rem 0;
    margin-top: auto;
    text-align: center;
    color: var(--muted);
    font-size: .9rem;
}
.site-footer-inner p { margin: 0.35rem 0; }
.site-footer-links a { color: var(--primary-light); }
.site-footer-notices {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: .5rem 1.25rem;
    margin-bottom: .85rem;
    padding-bottom: .85rem;
    border-bottom: 1px solid var(--border);
}
.site-footer-notice {
    margin: 0;
    font-size: .82rem;
    line-height: 1.45;
}
.site-footer-notice i { margin-right: .25rem; }
.site-footer-notice--policy i { color: var(--danger); }
.site-footer-notice--android i { color: #3ddc84; }
.site-footer-pill {
    display: inline-block;
    margin-left: .25rem;
    padding: .08rem .4rem;
    border-radius: 999px;
    font-size: .68rem;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
    color: #065f46;
    background: #d1fae5;
    border: 1px solid #6ee7b7;
}
.content-policy-notice {
    display: flex;
    align-items: flex-start;
    gap: .45rem;
    margin: 0 0 1rem;
    padding: .65rem .75rem;
    font-size: .88rem;
    line-height: 1.45;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #f8fbff;
}
.content-policy-notice i {
    color: var(--danger);
    margin-top: .15rem;
}
.home-library-rotate {
    margin: 0;
    font-size: .85rem;
}
.legal-document {
    max-width: 52rem;
    line-height: 1.65;
    font-size: 0.95rem;
}
.legal-document h1 { font-size: 1.75rem; margin-bottom: 0.5rem; }
.legal-document h2 {
    font-size: 1.15rem;
    margin: 2rem 0 0.75rem;
    color: var(--primary);
}
.legal-document section { margin-bottom: 1rem; }
.legal-document ul {
    margin: 0.5rem 0 1rem;
    padding-inline-start: 1.35rem;
}
.legal-document li { margin-bottom: 0.35rem; }
.legal-meta { color: var(--muted); font-size: 0.9rem; }
.legal-notice {
    background: var(--accent-bg);
    border-left: 4px solid var(--primary-light);
    padding: 0.75rem 1rem;
    font-size: 0.88rem;
    margin-bottom: 1.5rem;
}
.auth-legal-footer {
    margin-top: 1.5rem;
    text-align: center;
    font-size: 0.8rem;
}
.auth-legal-footer a { color: var(--primary-light); }

.auth-body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    padding: 20px;
}

.auth-card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 2rem;
    width: 100%;
    max-width: 420px;
}

.auth-logo {
    text-align: center;
    color: var(--primary);
    margin-bottom: 1.5rem;
    font-size: 1.75rem;
}

h1, h2, h3 { color: var(--primary-dark); margin-bottom: .75rem; }
h1 { font-size: 1.75rem; }
.muted { color: var(--muted); font-size: .95rem; }

.card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

.btn {
    display: inline-block;
    padding: .5rem 1.25rem;
    border-radius: var(--radius);
    font-weight: 500;
    text-decoration: none;
    border: 2px solid transparent;
    cursor: pointer;
    font-size: .95rem;
    font-family: inherit;
    line-height: 1.4;
}

.btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-light); border-color: var(--primary-light); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--accent-bg); }
.btn-secondary { background: var(--muted); color: #fff; border-color: var(--muted); }
.btn-sm { padding: .35rem .75rem; font-size: .85rem; }
.btn-row { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1rem; align-items: center; }

.alert {
    padding: .75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
}
.alert-success { background: #d1e7dd; color: #0f5132; }
.alert-error, .alert-danger { background: #f8d7da; color: #842029; }
.alert-info { background: #cff4fc; color: #055160; }
.alert-warning { background: #fff3cd; color: #664d03; }

.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-weight: 500; margin-bottom: .35rem; }
.form-control {
    width: 100%;
    padding: .5rem .75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font: inherit;
}
textarea.form-control { min-height: 100px; resize: vertical; }
.form-check { display: flex; align-items: center; gap: .5rem; margin-bottom: .5rem; }
.form-check input { width: auto; }

.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: #fff;
    padding: 2.5rem;
    border-radius: var(--radius);
    margin-bottom: 2rem;
}
.hero h1 { color: #fff; }
.hero p { opacity: .95; }

.search-bar {
    display: flex;
    gap: .75rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}
.search-bar .form-control { flex: 1; min-width: 200px; }

.quiz-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.25rem;
}

.quiz-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    transition: box-shadow .2s, transform .2s;
}
.quiz-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}
.quiz-card h3 { font-size: 1.1rem; margin-bottom: .5rem; }
.quiz-card h3 a { color: var(--primary); text-decoration: none; }
.quiz-meta { font-size: .85rem; color: var(--muted); margin-bottom: .75rem; }
.quiz-meta span + span::before { content: ' · '; }

.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.stat-box {
    background: var(--accent-bg);
    border-radius: var(--radius);
    padding: 1rem;
    text-align: center;
}
.stat-box .num { font-size: 1.75rem; font-weight: 700; color: var(--primary); }
.stat-box .lbl { font-size: .85rem; color: var(--muted); }

table.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .95rem;
}
table.data-table th,
table.data-table td {
    padding: .65rem .75rem;
    border-bottom: 1px solid var(--border);
    text-align: left;
}
table.data-table th { background: var(--accent-bg); font-weight: 600; }

.tabs { display: flex; gap: .5rem; border-bottom: 2px solid var(--border); margin-bottom: 1.5rem; flex-wrap: wrap; }
.tabs a {
    padding: .6rem 1rem;
    text-decoration: none;
    color: var(--muted);
    font-weight: 500;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
}
.tabs a.active { color: var(--primary); border-bottom-color: var(--primary); }

.wizard-steps {
    display: flex;
    gap: .5rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
    font-size: .85rem;
}
.wizard-steps span {
    padding: .25rem .6rem;
    border-radius: 999px;
    background: var(--accent-bg);
    color: var(--muted);
}
.wizard-steps span.current { background: var(--primary); color: #fff; }
.wizard-steps span.done { background: #d1e7dd; color: #0f5132; }

.badge {
    display: inline-block;
    padding: .2rem .5rem;
    border-radius: 4px;
    font-size: .75rem;
    font-weight: 600;
}
.badge-shared { background: #d1e7dd; color: #0f5132; }
.badge-community { background: #cfe2ff; color: #084298; }
.badge-request-open { background: #e8f5e9; color: #2e7d32; }
.badge-request-progress { background: #fff3cd; color: #856404; }
.badge-request-done { background: #cfe2ff; color: #084298; }

.quiz-request-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    list-style: none;
    padding: 0;
    margin: 0;
}
.quiz-request-card { padding: 1.25rem; }
.quiz-request-card--compact { padding: 1rem; }
.quiz-request-card-head {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}
.quiz-request-title { font-size: 1.1rem; margin: 0; }
.quiz-request-desc { margin: 0.5rem 0; }
.quiz-request-meta { font-size: 0.9rem; margin-bottom: 0.75rem; }
.quiz-request-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
}
.quiz-request-votes { margin-right: 0.5rem; }
.quiz-request-vote-form { display: inline; }
.quiz-request-vote-btn.active { border-color: var(--primary); background: #e7f1ff; }
.home-search-requests {
    margin-top: 1.1rem;
    font-size: 0.95rem;
    line-height: 1.5;
}
.home-section-head .btn { margin-left: auto; }
.badge-draft { background: #e9ecef; color: #495057; }

.score-pass { color: var(--success); font-weight: 700; font-size: 1.5rem; }
.score-fail { color: var(--danger); font-weight: 700; font-size: 1.5rem; }

/* Take flow */
body.immersive .site-main .container { max-width: 1200px; }
.take-header {
    background: var(--primary);
    color: #fff;
    padding: .75rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .12);
}
.take-header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}
.take-title { font-weight: 600; }
.take-header .btn-outline { color: #fff; border-color: #fff; }
.take-header .btn-outline:hover { background: rgba(255, 255, 255, .12); }

.quiz-take-wrap { margin: 0 auto; }
.quiz-take-form { margin: 0; }
.quiz-take-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 1.5rem;
    align-items: start;
}
.quiz-take-main {
    min-width: 0;
    max-width: 72ch;
}
.quiz-take-head { margin-bottom: 1.25rem; }
.quiz-take-title-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .65rem;
    margin-bottom: .35rem;
}
.quiz-take-title {
    font-size: 1.35rem;
    margin: 0;
    color: var(--primary-dark);
    line-height: 1.3;
}
.quiz-preview-badge {
    display: inline-block;
    padding: .2rem .55rem;
    border-radius: 999px;
    font-size: .75rem;
    font-weight: 700;
    letter-spacing: .02em;
    text-transform: uppercase;
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffecb5;
}
.quiz-take-mode-meta {
    margin: 0 0 1rem;
    font-size: .95rem;
    color: var(--muted);
}
.quiz-progress-block { margin-bottom: 1rem; }
.quiz-progress-block--sidebar { display: none; }
.quiz-progress-heading {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: .75rem;
    margin-bottom: .45rem;
}
.quiz-progress-label {
    font-size: 1.05rem;
    color: var(--primary-dark);
}
.quiz-progress-label strong { font-size: 1.2rem; }
.quiz-progress-answered { font-size: .85rem; }
.quiz-progress-bar {
    height: .5rem;
    background: var(--accent-bg);
    border-radius: 999px;
    overflow: hidden;
    border: 1px solid var(--border);
}
.quiz-progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: 999px;
    transition: width .25s ease;
}
.quiz-main-toolbar { margin-bottom: 1rem; }
.quiz-question-body { margin-bottom: 1rem; }
.quiz-take-sidebar { position: relative; }
.quiz-sidebar-inner {
    position: sticky;
    top: 5.5rem;
    display: flex;
    flex-direction: column;
    gap: .85rem;
    padding: 1rem;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}
.exam-timer-panel {
    text-align: center;
    padding: .85rem 1rem;
    background: #e8f4fd;
    border: 1px solid #b6d9f5;
    border-radius: var(--radius);
}
.exam-timer-label {
    display: block;
    font-size: .8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--primary-dark);
    margin-bottom: .25rem;
}
.exam-timer-value {
    display: block;
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-dark);
    font-variant-numeric: tabular-nums;
    line-height: 1.2;
}
.exam-timer-value.is-warning { color: #c45c00; }
.exam-timer-value.is-critical { color: var(--danger); }
.btn-block { width: 100%; justify-content: center; }
.quiz-sidebar-nav-head {
    display: flex;
    flex-direction: column;
    gap: .5rem;
}
.quiz-sidebar-nav-title {
    font-size: .85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--muted);
}
.quiz-nav-legend {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: .35rem .65rem;
    margin: 0;
    padding: 0;
    font-size: .72rem;
    color: var(--muted);
}
.quiz-nav-legend li {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
}
.quiz-nav-legend-dot {
    width: .55rem;
    height: .55rem;
    border-radius: 2px;
    flex-shrink: 0;
    border: 1px solid rgba(0, 0, 0, .12);
}
.quiz-nav-legend-dot.is-unanswered { background: #e9ecef; }
.quiz-nav-legend-dot.is-answered { background: var(--primary); border-color: var(--primary); }
.quiz-nav-legend-dot.is-mfr { background: #fff3cd; border-color: #e0b100; }
.quiz-nav-grid {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(2.35rem, 1fr));
    gap: .4rem;
    margin: 0;
    padding: 0;
    max-height: 220px;
    overflow-y: auto;
}
.quiz-nav-pill {
    width: 100%;
    min-height: 2.35rem;
    padding: .35rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #e9ecef;
    color: var(--primary-dark);
    font: inherit;
    font-size: .85rem;
    font-weight: 600;
    cursor: pointer;
    transition: background .15s, border-color .15s, transform .1s;
}
.quiz-nav-pill:hover { transform: translateY(-1px); }
.quiz-nav-pill.is-unanswered { background: #f8f9fa; }
.quiz-nav-pill.is-answered {
    background: #e7f1ff;
    border-color: var(--primary-light);
    color: var(--primary);
}
.quiz-nav-pill.is-mfr {
    background: #fff8e1;
    border-color: #e0b100;
    color: #7a5b00;
}
.quiz-nav-pill.is-current {
    box-shadow: 0 0 0 2px var(--primary);
    border-color: var(--primary);
}
.quiz-keyboard-hint {
    margin: 0;
    font-size: .75rem;
    line-height: 1.45;
}
.quiz-keyboard-hint kbd {
    display: inline-block;
    padding: .1rem .35rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--accent-bg);
    font-size: .7rem;
    font-family: inherit;
}
.nav-quiz-exit {
    margin-left: .5rem;
    border-color: var(--primary-light);
    color: var(--primary-light);
}
.nav-quiz-exit:hover { background: var(--accent-bg); }

.question-stem {
    font-size: 1.1rem;
    margin-bottom: 1.25rem;
    line-height: 1.55;
    max-width: 65ch;
}
.question-stem p { margin-bottom: .5rem; }
.question-stem table,
.scenario-case-body table,
.scenario-case-preview table,
.question-rationale table {
    width: 100%;
    border-collapse: collapse;
    margin: 0.75rem 0;
    font-size: 0.95rem;
}
.question-stem th,
.question-stem td,
.scenario-case-body th,
.scenario-case-body td,
.scenario-case-preview th,
.scenario-case-preview td,
.question-rationale th,
.question-rationale td {
    border: 1px solid var(--border);
    padding: 0.45rem 0.6rem;
    text-align: left;
    vertical-align: top;
}
.question-stem pre,
.scenario-case-body pre,
.scenario-case-preview pre,
.question-rationale pre {
    margin: 0.75rem 0;
    padding: 0.75rem 1rem;
    overflow-x: auto;
    border-radius: var(--radius);
    background: var(--surface-alt, #f4f6f8);
    font-family: Consolas, "Courier New", monospace;
    font-size: 0.9rem;
    line-height: 1.45;
}
.question-stem blockquote,
.scenario-case-body blockquote,
.scenario-case-preview blockquote,
.question-rationale blockquote {
    margin: 0.75rem 0;
    padding-left: 1rem;
    border-left: 3px solid var(--border);
    color: var(--text-muted, #5c6570);
}
.question-rationale { line-height: 1.55; }
.question-rationale p { margin-bottom: 0.5rem; }

.option-list { list-style: none; padding: 0; margin: 0; }
.option-item { margin-bottom: .75rem; }
.option-item label,
.option-label {
    display: flex;
    align-items: flex-start;
    gap: .75rem;
    padding: .9rem 1rem;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: border-color .15s, background .15s, box-shadow .15s;
}
.option-item label:hover,
.option-label:hover {
    border-color: var(--primary-light);
    background: var(--accent-bg);
}
.option-item:has(input:checked) label,
.option-item:has(input:checked) .option-label {
    border-color: var(--primary);
    background: #e7f1ff;
    box-shadow: 0 0 0 1px var(--primary);
}
.option-item input[type="radio"],
.option-item input[type="checkbox"] {
    flex-shrink: 0;
    width: 1.1rem;
    height: 1.1rem;
    margin-top: .2rem;
    accent-color: var(--primary);
}
.option-letter {
    flex-shrink: 0;
    min-width: 1.35rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.45;
}
.option-text { flex: 1; min-width: 0; line-height: 1.5; }
.option-item.correct label { border-color: var(--success); background: #d1e7dd; box-shadow: none; }
.option-item.incorrect label { border-color: var(--danger); background: #f8d7da; box-shadow: none; }
.option-feedback {
    font-size: .9rem;
    margin: .35rem 0 0 1.5rem;
    color: var(--primary-dark);
    font-style: italic;
}
.question-rationale {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--accent-bg);
    border-radius: var(--radius);
    border-left: 4px solid var(--primary-light);
}

.mark { font-weight: 700; margin-left: .25rem; }
.mark-correct { color: var(--success); }
.mark-incorrect { color: var(--danger); }

.study-result-banner {
    font-size: .85rem;
    font-weight: 600;
    margin: 0 0 .75rem;
    padding: 0;
}
.study-result-correct { color: var(--success); }
.study-result-incorrect { color: var(--danger); }
.study-review-legend {
    font-size: .85rem;
    margin-bottom: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: .5rem 1rem;
}
.study-bar-legend {
    font-size: .85rem;
    margin-bottom: .75rem;
}
.study-legend-item {
    padding: .15rem .5rem;
    border-radius: 4px;
    border: 1px solid var(--border);
}

/* MC / T-F study review — soft colored bars */
.study-option-bars {
    list-style: none;
    padding: 0;
    margin: 0;
}
.study-option-bar {
    margin-bottom: .5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    overflow: hidden;
}
.study-option-bar.study-opt-selected {
    border: 2px dashed var(--primary);
}
.study-option-bar-inner {
    display: flex;
    align-items: center;
    gap: .65rem;
    padding: .75rem 1rem;
    color: var(--text, #222);
}
.study-option-bar.study-opt-correct-selected .study-option-bar-inner,
.study-option-bar.study-opt-correct-missed .study-option-bar-inner,
.study-option-bar.study-opt-incorrect-selected .study-option-bar-inner {
    background: transparent;
    border-left: none;
}
.study-option-bar .mark {
    flex-shrink: 0;
    font-size: 1rem;
    font-weight: 700;
    line-height: 1;
}
.study-option-bar .study-opt-badge {
    display: none;
}
.study-option-bar-text {
    flex: 1;
    line-height: 1.45;
    min-width: 0;
}
.study-option-bar .option-feedback {
    margin: 0;
    padding: .5rem 1rem .75rem 2.5rem;
    font-size: .9rem;
    font-style: italic;
    color: var(--primary-dark, #444);
    background: rgba(255, 255, 255, 0.5);
    border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.study-review-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.study-review-option {
    margin-bottom: .75rem;
    padding: .75rem 1rem;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
}
.study-review-option-main {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .5rem .75rem;
}
.study-review-option-text { flex: 1; min-width: 120px; }
.study-opt-badge {
    font-size: .8rem;
    font-weight: 600;
    padding: .2rem .5rem;
    border-radius: 4px;
    white-space: nowrap;
}
.study-opt-correct-selected {
    border-color: var(--success);
    background: #d1e7dd;
}
.study-opt-correct-selected .study-opt-badge {
    background: #198754;
    color: #fff;
}
.study-opt-correct-missed {
    border-color: var(--success);
    background: #f4faf6;
    border-style: dashed;
}
.study-opt-correct-missed .study-opt-badge {
    background: #e8f5e9;
    color: #1b5e20;
}
.study-opt-incorrect-selected {
    border-color: var(--danger);
    background: #f8d7da;
}
.study-opt-incorrect-selected .study-opt-badge {
    background: #dc3545;
    color: #fff;
}
.study-opt-neutral {
    opacity: .75;
}
.study-review-option .option-feedback {
    margin: .5rem 0 0;
    padding-left: 0;
    font-style: italic;
}
.study-blank-row {
    padding: .75rem 1rem;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: .75rem;
}
.matching-review-answer {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .35rem .5rem;
    min-height: 2.5rem;
    padding: .4rem .65rem;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    font-size: inherit;
    line-height: 1.4;
}
.matching-review-text {
    font-weight: 600;
}
.study-matching-row .matching-left {
    font-weight: 500;
}
.study-blank-your,
.study-blank-correct,
.study-dnd-detail,
.study-cloze-your,
.study-cloze-correct {
    display: block;
    margin-top: .35rem;
    font-size: .95rem;
}
.study-blank-correct,
.study-cloze-correct {
    color: var(--success);
    font-weight: 500;
}
.study-cloze-review,
.study-inline-answer {
    display: inline-block;
    padding: .12em .45em;
    border-radius: 999px;
    vertical-align: middle;
    white-space: nowrap;
    line-height: 1.35;
    border: 2px solid transparent;
    box-decoration-break: clone;
    -webkit-box-decoration-break: clone;
}
.cloze-blank-wrap.study-cloze-blank {
    display: inline-block;
    vertical-align: middle;
    white-space: nowrap;
}
.study-inline-answer .mark {
    margin-right: .15em;
    vertical-align: baseline;
}
.study-answer-given {
    font-weight: 600;
}
.study-answer-wrong {
    text-decoration: line-through;
    text-decoration-thickness: 2px;
    opacity: .9;
}
.study-answer-fix {
    font-weight: 600;
    color: var(--success);
}
.study-seq-answer-key {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--accent-bg);
    border-radius: var(--radius);
}
.study-correct-order {
    margin: .5rem 0 0 1.25rem;
}
.study-correct-order li.study-seq-match {
    color: var(--success);
    font-weight: 600;
}
.study-seq-review .seq-item {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .5rem;
}

.quiz-nav-buttons {
    margin-top: 1.75rem;
    justify-content: flex-end;
    gap: .65rem;
}
.study-hide-offer {
    padding: 1rem;
    margin: 1rem 0;
}

.quiz-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.45);
    z-index: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.quiz-overlay[hidden] { display: none !important; }
.quiz-overlay-panel {
    background: #fff;
    border-radius: var(--radius);
    padding: 1.5rem;
    max-width: 480px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
}
.quiz-review-panel { max-width: 520px; }
.quiz-review-panel-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: .75rem;
}
.quiz-review-panel-head h3 { margin: 0; }
.quiz-nav-legend--overlay { margin-bottom: .75rem; }

@media (max-width: 960px) {
    .quiz-take-layout {
        grid-template-columns: 1fr;
    }
    .quiz-take-sidebar { order: -1; }
    .quiz-take-main { max-width: none; }
    .quiz-progress-block--main { display: block; }
    .quiz-progress-block--sidebar { display: none; }
    .quiz-sidebar-inner {
        position: static;
        top: auto;
    }
    .quiz-nav-grid { max-height: 160px; }
    .quiz-keyboard-hint { display: none; }
}

.setup-fieldset {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
}
.setup-fieldset legend { font-weight: 600; padding: 0 .5rem; }
.setup-mode-label, .setup-length-label, .setup-quality-label { display: block; margin-bottom: .5rem; }
.setup-label-em { font-weight: 600; color: var(--primary); }
.setup-quality-note { margin: 0 0 .65rem; font-size: .9rem; }
.setup-quality-select-wrap { margin: 0; max-width: 28rem; }
.setup-community-stats {
    padding: .75rem 1rem;
    margin-bottom: 1rem;
    background: var(--accent-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}
.setup-community-stats-title { font-size: 1rem; margin: 0 0 .5rem; font-weight: 600; }
.setup-community-stats-row { margin-bottom: .35rem; }
.setup-community-stats-row .stat-box { padding: .45rem .6rem; min-width: 0; }
.setup-community-stats-row .stat-num { font-size: 1.25rem; line-height: 1.2; }
.setup-community-stats-row .stat-label { font-size: .72rem; line-height: 1.25; }
.setup-community-stats-meta { margin: .35rem 0 0; font-size: .82rem; }
.setup-advanced-wrap { margin-bottom: 1rem; }
.setup-advanced-trigger { margin-bottom: .65rem; }
.setup-advanced-intro { margin: 0 0 1rem; font-size: .95rem; }
.setup-advanced-block { margin-bottom: 1.25rem; }
.setup-advanced-block:last-of-type { margin-bottom: .75rem; }
.setup-advanced-heading { font-size: 1rem; margin: 0 0 .35rem; font-weight: 600; }
.setup-advanced-options { padding-left: 1.15rem; }
.setup-domain-grid { display: flex; flex-direction: column; gap: .4rem; margin-top: .5rem; }
.setup-domain-label { display: block; cursor: pointer; }
.setup-domain-name { font-weight: 500; }
.setup-advanced-toggle { display: block; margin-bottom: .65rem; cursor: pointer; }
.setup-advanced-toggle--locked { cursor: not-allowed; opacity: .72; }
.setup-advanced-toggle--locked .setup-label-em { color: var(--text-muted, #6c757d); font-weight: 500; }

@media (max-width: 640px) {
    .setup-options.card { padding: 1rem; }
    .setup-fieldset { padding: .85rem .9rem; margin-bottom: .85rem; }
    .setup-community-stats { padding: .65rem .75rem; }
    .setup-community-stats-row {
        display: grid;
        grid-template-columns: 1fr;
        gap: .45rem;
        padding: 0;
        margin-bottom: 0;
        background: transparent;
    }
    .setup-community-stats-row .stat-box {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: .75rem;
        text-align: left;
        padding: .55rem .65rem;
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius);
        min-width: 0;
    }
    .setup-community-stats-row .stat-num {
        font-size: 1.15rem;
        flex-shrink: 0;
    }
    .setup-community-stats-row .stat-label {
        font-size: .78rem;
        line-height: 1.3;
    }
    .setup-quality-select-wrap { max-width: none; }
    .setup-mode-label,
    .setup-length-label,
    .setup-advanced-toggle {
        display: flex;
        flex-wrap: wrap;
        align-items: flex-start;
        gap: .3rem .55rem;
        line-height: 1.45;
    }
    .setup-mode-label input,
    .setup-length-label input,
    .setup-advanced-toggle input {
        flex-shrink: 0;
        margin-top: .22rem;
    }
    .setup-advanced-toggle .muted {
        flex: 1 1 100%;
        padding-left: 1.65rem;
        margin-top: -.15rem;
    }
    .setup-domain-label {
        display: flex;
        flex-wrap: wrap;
        align-items: baseline;
        gap: .2rem .45rem;
        line-height: 1.45;
    }
    .setup-domain-label input {
        flex-shrink: 0;
        margin-top: .15rem;
    }
    .setup-domain-label .setup-domain-name {
        flex: 1 1 8rem;
        min-width: 0;
    }
    .setup-advanced-options { padding-left: 0; }
    .setup-advanced-intro { font-size: .9rem; }
    .btn-row.setup-btn-row { flex-direction: column; align-items: stretch; }
    .btn-row.setup-btn-row .btn { width: 100%; text-align: center; }
}

.question-vote-panel {
    margin-top: 1.25rem;
    padding: 1rem 1.25rem;
    background: var(--accent-bg);
    border: 1px solid var(--border);
}
.question-vote-title { font-size: 1rem; margin-bottom: .5rem; }
.question-vote-stats { margin-bottom: .75rem; }
.question-vote-form {
    display: inline-flex;
    align-items: flex-start;
    gap: .5rem;
    margin-right: 1rem;
    max-width: 280px;
    vertical-align: top;
}
.question-vote-label {
    display: block;
    font-size: .8rem;
    line-height: 1.3;
    margin-top: .15rem;
}
.question-vote-btn.active { border-color: var(--primary); background: #e7f1ff; }
.vote-stat-pct { margin-left: .25rem; }

.seq-list { list-style: none; }
.seq-item {
    display: flex;
    align-items: center;
    gap: .5rem;
    padding: .5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: .5rem;
}
.seq-item.correct-row { border-color: var(--success); }
.seq-item.incorrect-row { border-color: var(--danger); }

.matching-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: .75rem;
    align-items: center;
}

/* Multiple choice option editor (Studio / Wizard) */
.mc-options-editor { margin-bottom: 1rem; }
.mc-options-hint { margin: 0 0 .75rem; font-size: .9rem; }

.mc-options-table {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    background: #fff;
}

.mc-options-head,
.mc-option-row {
    display: grid;
    column-gap: .65rem;
    align-items: center;
}

.mc-options-head {
    grid-template-columns: 3.25rem minmax(0, 1fr) 2.5rem;
    font-size: .75rem;
    font-weight: 600;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: .03em;
    padding: .5rem .75rem;
    margin: 0;
    background: var(--accent-bg);
    border-bottom: 1px solid var(--border);
}

.mc-option-row {
    grid-template-columns: 3.25rem 2.25rem minmax(0, 1fr) 2.5rem;
}

.mc-options-body .mc-option-row {
    padding: .55rem .75rem;
    border-bottom: 1px solid var(--border);
    row-gap: .4rem;
}

.mc-options-body .mc-option-row:last-child {
    border-bottom: none;
}

.mc-cell-check {
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
    cursor: pointer;
    height: 100%;
}
.mc-cell-check input[type="checkbox"] {
    width: 1.1rem;
    height: 1.1rem;
    margin: 0;
    cursor: pointer;
    flex-shrink: 0;
}

.mc-cell-text {
    min-width: 0;
    width: 100%;
}
.mc-cell-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: .95rem;
    color: var(--primary);
    background: var(--accent-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 2.25rem;
    height: 2.25rem;
    flex-shrink: 0;
}

.mc-cell-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    min-width: 2.5rem;
    padding: 0;
    font-size: 1.25rem;
    line-height: 1;
    flex-shrink: 0;
}

.mc-add-option { margin-top: .65rem; }

.tf-options-table {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}
.tf-option-row {
    display: grid;
    grid-template-columns: 2.25rem 1fr;
    gap: .65rem;
    align-items: center;
    padding: .55rem .75rem;
    border-bottom: 1px solid var(--border);
}
.tf-option-row:last-child { border-bottom: none; }
.tf-cell-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: .95rem;
    color: var(--primary);
    background: var(--accent-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 2.25rem;
    height: 2.25rem;
}
.tf-cell-label { margin: 0; }

.rationale-randomize-warning {
    color: #b02a37;
    font-size: .9rem;
    font-weight: 500;
    margin: .35rem 0 .5rem;
    line-height: 1.45;
}
.rationale-hint {
    margin: .35rem 0 .5rem;
    font-size: .9rem;
}

@media (max-width: 480px) {
    .mc-options-head {
        grid-template-columns: 2.75rem minmax(0, 1fr) 2.25rem;
        column-gap: .45rem;
    }
    .mc-option-row {
        grid-template-columns: 2.75rem 2rem minmax(0, 1fr) 2.25rem;
        column-gap: .45rem;
    }
    .mc-cell-action {
        width: 2.25rem;
        height: 2.25rem;
        min-width: 2.25rem;
    }
}

.landing-hero {
    text-align: center;
    padding: 3rem 1rem 2rem;
    background: linear-gradient(to bottom, #f8f9fa, #fff);
    border-radius: var(--radius);
    margin-bottom: 2rem;
}

.landing-tagline {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--primary-light);
    margin-bottom: .75rem;
}

.landing-hero h1 {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

.landing-lead {
    max-width: 640px;
    margin: 0 auto 1.5rem;
    color: var(--muted);
}

.landing-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.stats-row {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--accent-bg);
    border-radius: var(--radius);
}

.stat-box { text-align: center; min-width: 140px; }
.stat-num { font-size: 2rem; font-weight: 700; color: var(--primary); }
.stat-label { font-size: .95rem; color: var(--muted); }

.landing-note { margin-top: 2rem; }
.landing-note a { color: var(--primary-light); }

.nav-auth-btn { margin-left: .25rem; }
.main-nav a.btn-primary,
.main-nav a.btn-primary:hover {
    color: #fff;
}
.main-nav a.btn-outline {
    color: var(--primary);
    border-color: var(--primary);
}
.main-nav a.btn-outline:hover {
    color: var(--primary-dark);
    background: var(--accent-bg);
}

/* —— Home / browse —— */
.home-page {
    max-width: 1080px;
    margin: 0 auto;
}

.home-community-banner {
    margin-bottom: 1.75rem;
}

.home-community-banner--slim {
    margin-bottom: 1.25rem;
}

.home-community-banner-slim-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .65rem 1rem;
    padding: .85rem 1.1rem;
    border-radius: 12px;
    background: linear-gradient(135deg, #e8f4fc 0%, #d4e8f7 100%);
    border: 1px solid #9ec9ef;
}

.home-community-banner-slim-text {
    flex: 1;
    min-width: min(100%, 16rem);
    margin: 0;
    font-size: .92rem;
    line-height: 1.45;
    color: #0c3d6e;
}

.home-community-banner-slim-text a {
    font-weight: 600;
    color: var(--primary-dark);
}

.home-community-banner-slim-actions {
    display: flex;
    flex-direction: column;
    gap: .55rem;
    width: 100%;
}

.home-community-banner-slim-actions .btn {
    width: 100%;
    text-align: center;
}

@media (min-width: 720px) {
    .home-community-banner-slim-actions {
        flex-direction: row;
        flex-wrap: wrap;
        width: auto;
        flex: 0 0 auto;
    }

    .home-community-banner-slim-actions .btn {
        width: auto;
        flex: 0 0 auto;
    }
}

.home-community-banner-bubble {
    display: flex;
    align-items: flex-start;
    gap: 1.15rem;
    padding: 1.35rem 1.5rem;
    border-radius: 16px;
    background: linear-gradient(145deg, #d4e8f7 0%, #b8d4f0 42%, #e8f4fc 100%);
    border: 1px solid #7eb8e8;
    box-shadow:
        0 10px 28px rgba(10, 77, 140, 0.16),
        inset 0 1px 0 rgba(255, 255, 255, 0.85);
    position: relative;
    overflow: hidden;
}

.home-community-banner-bubble::before {
    content: '';
    position: absolute;
    top: -3rem;
    right: -1.5rem;
    width: 9rem;
    height: 9rem;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.45);
    pointer-events: none;
}

.home-community-banner-bubble::after {
    content: '';
    position: absolute;
    bottom: -2.5rem;
    left: 35%;
    width: 6rem;
    height: 6rem;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.25);
    pointer-events: none;
}

.home-community-banner-icon {
    flex-shrink: 0;
    width: 3.25rem;
    height: 3.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: linear-gradient(160deg, var(--primary-light) 0%, var(--primary) 100%);
    color: #fff;
    font-size: 1.35rem;
    box-shadow: 0 4px 14px rgba(8, 58, 107, 0.35);
    position: relative;
    z-index: 1;
}

.home-community-banner-body {
    flex: 1;
    min-width: 0;
    position: relative;
    z-index: 1;
}

.home-community-banner-kicker {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .5rem .75rem;
    margin: 0 0 .6rem;
}

.home-community-banner-new {
    display: inline-block;
    padding: .2rem .55rem;
    font-size: .72rem;
    font-weight: 700;
    letter-spacing: .05em;
    text-transform: uppercase;
    color: #7c2d12;
    background: #ffedd5;
    border: 1px solid #fdba74;
    border-radius: 999px;
}

.home-community-banner-title {
    margin: 0 0 .9rem;
    font-size: 1.1rem;
    line-height: 1.5;
    font-weight: 600;
    color: #0c3d6e;
}

.home-community-banner-title a {
    color: var(--primary-dark);
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
}

.home-community-banner-title a:hover {
    color: var(--primary-light);
}

.home-community-banner-actions {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem .65rem;
    margin: 0;
}

.home-community-banner-btn-secondary {
    background: rgba(255, 255, 255, 0.92);
    border-color: #7eb8e8;
}

.home-community-banner-btn-secondary:hover {
    background: #fff;
    border-color: var(--primary);
}

@media (max-width: 540px) {
    .home-community-banner {
        margin-bottom: 1.5rem;
    }

    .home-community-banner-bubble {
        flex-direction: column;
        align-items: stretch;
        padding: 1.15rem 1.15rem;
        border: 2px solid #7eb8e8;
        box-shadow:
            0 4px 18px rgba(10, 77, 140, 0.14),
            inset 0 1px 0 rgba(255, 255, 255, 0.85);
    }

    .home-community-banner-icon {
        width: 2.75rem;
        height: 2.75rem;
        font-size: 1.15rem;
    }
}

.home-hero {
    text-align: center;
    padding: 1.5rem 0 2rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

.home-hero-inner {
    max-width: 780px;
    margin: 0 auto;
}

.home-activity {
    padding: 0;
    margin: 0;
}

.home-activity-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--primary);
    margin: 0 0 .25rem;
}

.home-activity-sub {
    font-size: .8rem;
    margin: 0 0 .85rem;
}

.home-activity-list,
.home-activity-feed {
    list-style: none;
    padding: 0;
    margin: 0 0 .85rem;
    display: grid;
    gap: .65rem;
}

.home-activity-list li,
.home-activity-feed li,
.home-activity-item {
    display: grid;
    gap: .15rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.home-activity-text {
    font-size: .88rem;
    line-height: 1.45;
    color: var(--text);
}

.home-activity-text a {
    font-weight: 500;
}

.home-activity-time {
    font-size: .78rem;
}

.home-activity-feed--page {
    gap: .85rem;
}

.home-activity-value {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.1;
    font-variant-numeric: tabular-nums;
}

.home-activity-label {
    font-size: .82rem;
    color: var(--muted);
    line-height: 1.3;
}

.home-activity-foot {
    font-size: .78rem;
    margin: 0;
    padding-top: .65rem;
    border-top: 1px solid var(--border);
}

.home-activity-announcements {
    margin: 0 0 .85rem;
    padding: .75rem .8rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #f8fbff;
}

.home-activity-announcement {
    display: flex;
    align-items: flex-start;
    gap: .5rem;
    margin: 0;
    font-size: .82rem;
    line-height: 1.4;
}

.home-activity-announcement + .home-activity-announcement {
    margin-top: .55rem;
}

.home-activity-announcement-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.2rem;
    min-width: 1.2rem;
    margin-top: .05rem;
    font-size: .95rem;
}

.home-activity-announcement--warning .home-activity-announcement-icon {
    color: var(--danger);
}

.home-activity-announcement--android .home-activity-announcement-icon--android {
    color: #3ddc84;
    filter: drop-shadow(0 0 6px rgba(61, 220, 132, 0.45));
}

.home-activity-announcement-pill {
    display: inline-block;
    margin-left: .35rem;
    padding: .1rem .45rem;
    border-radius: 999px;
    font-size: .68rem;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
    color: #065f46;
    background: #d1fae5;
    border: 1px solid #6ee7b7;
    animation: homeAnnouncementPulse 1.8s ease-in-out infinite;
}

@keyframes homeAnnouncementPulse {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.25); }
    50% { transform: scale(1.04); box-shadow: 0 0 0 5px rgba(16, 185, 129, 0.12); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

@media (prefers-reduced-motion: reduce) {
    .home-activity-announcement-pill {
        animation: none;
    }
}

.home-welcome {
    font-size: .95rem;
    color: var(--primary-light);
    font-weight: 500;
    margin-bottom: .75rem;
}

.home-eyebrow {
    font-size: .85rem;
    font-weight: 600;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: .5rem;
}

.home-title {
    font-size: clamp(1.75rem, 4vw, 2.35rem);
    line-height: 1.2;
    color: var(--primary);
    margin-bottom: .85rem;
}

.home-hero-stats {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: .65rem 1.75rem;
    margin: 0 auto 1.5rem;
    font-size: .95rem;
    color: var(--muted);
    font-weight: 500;
    letter-spacing: .02em;
}
.home-hero-stat {
    display: inline-flex;
    align-items: baseline;
    gap: .35rem;
    white-space: nowrap;
}
.home-hero-stat-value {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
    font-variant-numeric: tabular-nums;
    line-height: 1.2;
}
@media (min-width: 768px) {
    .home-hero-stat-value { font-size: 1.35rem; }
}
.home-hero-stat-label {
    font-size: .9rem;
    color: var(--muted);
}
.home-hero-stat-sep {
    color: #d1d5db;
    user-select: none;
    line-height: 1;
}
.home-lead {
    color: var(--muted);
    font-size: 1.05rem;
    max-width: 620px;
    margin: 0 auto 1.5rem;
}

.home-search {
    text-align: left;
    margin: 0 auto;
    max-width: 640px;
}

.home-search-primary {
    display: flex;
    gap: .55rem;
    flex-wrap: nowrap;
    padding: .5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    box-shadow: 0 2px 8px rgba(8, 58, 107, 0.06);
}

.home-search-primary .form-control {
    flex: 1;
    min-width: 0;
}

.home-search-submit {
    flex-shrink: 0;
}

.home-search-clear,
.home-search-browse {
    flex-shrink: 0;
}

.home-search-requests,
.home-search-create {
    text-align: center;
    font-size: .9rem;
}

.home-search-requests {
    margin-top: 1rem;
}

.home-search-create {
    margin-top: .5rem;
}

.home-topic-nav {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: center;
    gap: .35rem .7rem;
    margin-top: 1.15rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    font-size: .9rem;
    line-height: 1.5;
}

.home-topic-nav-label {
    color: var(--muted);
    font-weight: 500;
}

.home-topic-nav a {
    color: var(--primary-light);
    text-decoration: none;
}

.home-topic-nav a:hover {
    color: var(--primary);
    text-decoration: underline;
}

.home-how {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.home-how-card {
    display: flex;
    flex-direction: column;
    padding: 1.15rem 1.2rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    min-height: 0;
}

.home-how-card--community {
    background: linear-gradient(160deg, #f8fbff 0%, #eef6fc 100%);
    border-color: #b8d4f0;
}

.home-how-community-badge {
    align-self: flex-start;
    margin-bottom: .45rem;
}

.home-how-card-actions {
    display: flex;
    flex-wrap: wrap;
    gap: .45rem;
    margin-top: auto;
    padding-top: .75rem;
}

.home-how-title {
    font-size: .95rem;
    font-weight: 700;
    color: var(--primary);
    margin: 0 0 .45rem;
}

.home-how-card p {
    margin: 0;
    font-size: .88rem;
    color: var(--muted);
    line-height: 1.5;
}

.home-how-card p a {
    font-weight: 600;
    color: var(--primary-dark);
}

@media (max-width: 767px) {
    .home-how {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: .65rem;
        margin-bottom: 1.5rem;
    }

    .home-how-card {
        padding: .85rem .75rem;
    }

    .home-how-title {
        font-size: .88rem;
        margin-bottom: .35rem;
    }

    .home-how-card p {
        font-size: .78rem;
        line-height: 1.4;
    }

    .home-how-card-actions .btn {
        font-size: .78rem;
        padding: .35rem .65rem;
    }
}

@media (max-width: 420px) {
    .home-how-card-actions {
        flex-direction: column;
    }

    .home-how-card-actions .btn {
        width: 100%;
        text-align: center;
    }
}

.home-body {
    display: grid;
    gap: 1.75rem;
    align-items: start;
    margin-bottom: 2rem;
}

@media (min-width: 900px) {
    .home-body {
        grid-template-columns: minmax(0, 7fr) minmax(200px, 3fr);
        gap: 1.5rem;
    }
}

/* Tabbed exams / requests panel */
.home-exams-panel-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
    flex-wrap: wrap;
    padding: 1rem 1.1rem .5rem;
}

.home-exams-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: .35rem;
}

.home-exams-tab {
    padding: .45rem .85rem;
    font: inherit;
    font-size: .86rem;
    font-weight: 600;
    color: var(--muted);
    background: #f4f7fa;
    border: 1px solid var(--border);
    border-radius: 999px;
    cursor: pointer;
    transition: background .15s, border-color .15s, color .15s;
}

.home-exams-tab:hover {
    color: var(--primary);
    border-color: #c5d5e8;
}

.home-exams-tab.is-active {
    color: #fff;
    background: var(--primary);
    border-color: var(--primary);
}

.home-exams-tabpanel {
    display: none;
}

.home-exams-tabpanel.is-active {
    display: block;
}

.home-exams-panel-sub {
    margin: 0;
    padding: 0 1.1rem .65rem;
    font-size: .82rem;
}

.home-exams-panel-foot {
    margin: 0;
    padding: .65rem 1.1rem .85rem;
    border-top: 1px solid var(--border);
    font-size: .82rem;
    text-align: center;
}

.home-exams-carousel {
    border-top: 1px solid var(--border);
}

.home-exam-card {
    padding: .85rem 1.1rem;
    border-bottom: 1px solid var(--border);
}

.home-exam-card:last-child {
    border-bottom: none;
}

.home-exam-card-title {
    display: block;
    font-weight: 600;
    font-size: .95rem;
    color: var(--primary);
    text-decoration: none;
    line-height: 1.35;
    margin-bottom: .25rem;
}

.home-exam-card-title:hover {
    text-decoration: underline;
}

.home-exam-card-meta {
    margin: .2rem 0 0;
    font-size: .82rem;
    color: var(--muted);
    line-height: 1.4;
}

.home-exam-card-actions {
    margin-top: .55rem;
}

.home-exam-card--request .home-exam-card-actions .quiz-request-vote-form {
    display: inline;
}

@media (max-width: 767px) {
    .home-exams-panel-head {
        padding: .85rem 1rem .35rem;
    }

    .home-exams-panel-sub {
        padding: 0 1rem .55rem;
    }

    .home-exams-carousel {
        display: flex;
        flex-direction: row;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        gap: .75rem;
        padding: .25rem 1rem 1rem;
        border-top: none;
    }

    .home-exams-carousel::-webkit-scrollbar {
        display: none;
    }

    .home-exam-card {
        flex: 0 0 85%;
        scroll-snap-align: start;
        border: 1px solid var(--border);
        border-radius: var(--radius);
        padding: 1rem;
        background: #fff;
        box-shadow: 0 2px 8px rgba(8, 58, 107, 0.06);
    }

    .home-exam-card:last-child {
        border-bottom: 1px solid var(--border);
    }
}

@media (min-width: 768px) {
    .home-exams-carousel {
        display: block;
        border-top: 1px solid var(--border);
    }

    .home-exam-card {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: .25rem .65rem;
        padding: .8rem 1.1rem;
        min-height: 0;
    }

    .home-exam-card-title {
        flex: 1 1 auto;
        min-width: 0;
        margin-bottom: 0;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .home-exam-card-meta {
        flex: 0 0 auto;
        margin: 0;
        white-space: nowrap;
    }

    .home-exam-card--request {
        align-items: flex-start;
    }

    .home-exam-card--request .home-exam-card-title {
        flex: 1 1 100%;
        white-space: normal;
    }

    .home-exam-card--request .home-exam-card-meta {
        flex: 1 1 auto;
    }

    .home-exam-card-actions {
        flex: 0 0 auto;
        margin-top: 0;
    }
}

.home-section-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    overflow: hidden;
}

.home-section-card .home-section-head {
    padding: 1rem 1.1rem .65rem;
    margin-bottom: 0;
}

.home-section-card .home-quiz-rows {
    border: none;
    border-radius: 0;
    border-top: 1px solid var(--border);
}

.home-section-card.home-sidebar-widget {
    padding: 0;
    margin: 0;
    box-shadow: none;
}

.home-section-card .home-sidebar-widget-head,
.home-section-card .home-activity-title,
.home-section-card .home-sidebar-widget-title {
    padding: 1rem 1.1rem 0;
    margin: 0;
}

.home-section-card .home-activity-sub {
    padding: 0 1.1rem;
    margin: .2rem 0 .85rem;
}

.home-section-card .home-activity-feed,
.home-section-card .home-request-rows {
    padding: 0 1.1rem;
    margin: 0 0 .85rem;
}

.home-section-card .home-activity-foot,
.home-section-card .home-sidebar-widget-foot {
    margin: 0;
    padding: .65rem 1.1rem .85rem;
    border-top: 1px solid var(--border);
}

.home-section-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: .85rem;
}

.home-section-head h2,
.home-popular h2,
.home-results h2 {
    font-size: 1.2rem;
    color: var(--primary);
    margin: 0;
}

.home-section-sub {
    margin: .2rem 0 0;
    font-size: .85rem;
}

.home-quiz-rows {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    overflow: hidden;
}

.home-quiz-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .2rem .5rem;
    padding: .7rem 1rem;
    border-bottom: 1px solid var(--border);
}

.home-quiz-row:last-child {
    border-bottom: none;
}

.home-quiz-row-title {
    flex: 1 1 auto;
    min-width: 0;
    max-width: 100%;
    font-weight: 500;
    color: var(--primary);
    text-decoration: none;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.home-quiz-row-title:hover {
    text-decoration: underline;
}

.home-quiz-row-meta {
    flex: 0 0 100%;
    font-size: .82rem;
    color: var(--muted);
}

.home-sidebar {
    display: grid;
    gap: 1rem;
    align-content: start;
}

.home-sidebar-widget {
    padding: 1rem 1.1rem;
    margin: 0;
}

.home-activity.home-section-card {
    padding-bottom: 0;
}

@media (max-width: 767px) {
    .home-activity--feed.home-section-card {
        border: none;
        background: transparent;
        border-radius: 0;
        box-shadow: none;
    }

    .home-activity--feed .home-activity-title {
        padding: 0 0 .5rem;
        font-size: 1rem;
    }

    .home-activity--feed .home-activity-feed {
        padding: 0;
        margin: 0 0 .5rem;
        list-style: none;
    }

    .home-activity--feed .home-activity-feed--home .home-activity-item {
        padding: .65rem 0;
        border-bottom: 1px solid #edf2f7;
    }

    .home-activity--feed .home-activity-feed--home .home-activity-item:nth-child(n+4) {
        display: none;
    }

    .home-activity--feed .home-activity-feed--home .home-activity-item:last-child {
        border-bottom: none;
    }

    .home-activity--feed .home-activity-foot {
        padding: .5rem 0 0;
        border-top: 1px solid #edf2f7;
        text-align: left;
    }
}

.home-sidebar-widget-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: .75rem;
    margin-bottom: .65rem;
}

.home-sidebar-widget-title,
.home-sidebar-widget-head h2 {
    font-size: .95rem;
    font-weight: 700;
    color: var(--primary);
    margin: 0;
}

.home-sidebar-widget-foot {
    margin: .65rem 0 0;
    padding-top: .6rem;
    border-top: 1px solid var(--border);
    font-size: .82rem;
}

.home-request-rows {
    list-style: none;
    padding: 0;
    margin: 0;
}

.home-request-row {
    padding: .55rem 0;
    border-bottom: 1px solid var(--border);
    list-style: none;
}

.home-request-row:last-child {
    border-bottom: none;
}

.home-request-row-title {
    display: block;
    font-size: .88rem;
    font-weight: 500;
    color: var(--primary);
    text-decoration: none;
    line-height: 1.35;
}

.home-request-row-title:hover {
    text-decoration: underline;
}

.home-request-row-meta {
    display: block;
    font-size: .78rem;
    color: var(--muted);
    margin-top: .15rem;
}

.home-results {
    margin-bottom: 2rem;
}

.quiz-link-list {
    list-style: none;
    padding: 0;
    margin: 0 0 1.5rem;
}

.quiz-link-list--results {
    margin-top: .5rem;
}

@media (min-width: 720px) {
    .quiz-link-list {
        column-count: 2;
        column-gap: 2.5rem;
    }
}

.quiz-link-item {
    break-inside: avoid;
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: .25rem .65rem;
    padding: .4rem 0;
    border-bottom: 1px dotted var(--border);
}

.quiz-link-title {
    font-weight: 500;
    color: var(--primary);
    text-decoration: none;
}

.quiz-link-title:hover {
    text-decoration: underline;
}

.quiz-link-meta {
    font-size: .82rem;
    color: var(--muted);
}

.badge-sm {
    font-size: .7rem;
    padding: .1rem .4rem;
    vertical-align: middle;
}

.home-library {
    margin-bottom: 2rem;
}

.home-requests {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border);
}

.home-library-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.home-library-head h2 {
    font-size: 1.25rem;
    color: var(--primary);
    margin: 0;
}

.home-see-all {
    font-size: .9rem;
    color: var(--primary-light);
    text-decoration: none;
    white-space: nowrap;
}

.home-see-all:hover {
    text-decoration: underline;
}

.home-library-category {
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary);
    margin: 0 0 .35rem;
}

.home-library-group {
    margin-bottom: 1.25rem;
}

.home-requests-cta {
    margin: .75rem 0 0;
    font-size: .9rem;
}

.home-requests .quiz-request-list {
    gap: 0;
}

.home-requests .quiz-request-card {
    padding: .85rem 0;
    margin: 0;
    border: none;
    border-radius: 0;
    border-bottom: 1px solid var(--border);
    box-shadow: none;
    background: transparent;
}

.home-requests .quiz-request-card:last-child {
    border-bottom: none;
}

.home-pillars {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.home-pillar {
    padding: 1.25rem 1.35rem;
    border-top: 3px solid var(--primary-light);
}

.home-pillar h2 {
    font-size: 1.05rem;
    color: var(--primary);
    margin-bottom: .4rem;
}

.home-pillar p {
    font-size: .92rem;
    color: var(--muted);
    margin: 0;
}

.home-pillar-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    background: var(--accent-bg);
    color: var(--primary-light);
    margin-bottom: .65rem;
}

.home-section { margin-bottom: 2.5rem; }

.home-section-head {
    margin-bottom: 1.1rem;
}

.home-section-head h2 {
    font-size: 1.35rem;
    color: var(--primary);
    margin-bottom: .2rem;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: .85rem;
}

.category-card {
    display: flex;
    flex-direction: column;
    gap: .25rem;
    padding: 1rem 1.1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    text-decoration: none;
    color: inherit;
    background: #fff;
    transition: box-shadow .2s, border-color .2s, transform .2s;
}

.category-card:hover {
    border-color: var(--primary-light);
    box-shadow: var(--shadow);
    transform: translateY(-1px);
}

.category-icon {
    color: var(--primary-light);
    font-size: 1.15rem;
    margin-bottom: .15rem;
}

.category-name {
    font-weight: 600;
    color: var(--primary);
    font-size: .98rem;
}

.category-count {
    font-size: .85rem;
    color: var(--muted);
}

.home-create {
    margin-top: 1rem;
    padding: 1.35rem 1.5rem;
    background: var(--accent-bg);
    border-left: 4px solid var(--primary-light);
}

.home-create-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.home-create h2 {
    font-size: 1.15rem;
    color: var(--primary);
    margin-bottom: .25rem;
}

.hero { padding: 1.5rem 0 1rem; }
.hero h1 { color: var(--primary); }

.scenario-case-panel {
    background: var(--accent-bg);
    border-left: 4px solid var(--primary);
    padding: 1rem 1.25rem;
    margin-bottom: 1.25rem;
    border-radius: var(--radius);
}

.scenario-case-title {
    font-size: .95rem;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--primary);
    margin-bottom: .5rem;
}

.scenario-sub-row td { color: var(--muted); font-size: .95rem; }
.scenario-manage-card .scenario-case-preview { margin-bottom: 1rem; }
.scenario-sub-list { margin: .75rem 0 0 1.25rem; }
.scenario-sub-list li { margin-bottom: .35rem; }

.field-hint {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.1rem;
    height: 1.1rem;
    margin-left: .25rem;
    border-radius: 50%;
    background: var(--accent-bg);
    color: var(--primary);
    font-size: .75rem;
    font-weight: 700;
    cursor: help;
    vertical-align: middle;
    position: relative;
}

.field-hint-popup {
    position: fixed;
    z-index: 10000;
    min-width: 200px;
    max-width: 320px;
    padding: .5rem .65rem;
    background: #222;
    color: #fff;
    font-size: .8rem;
    font-weight: 400;
    line-height: 1.4;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    pointer-events: none;
}

.topic-tree { list-style: none; padding: 0; margin: 0 0 1rem; }
.topic-tree-item { margin-bottom: 0; }
.topic-tree-parent {
    margin-bottom: .65rem;
    padding-bottom: .35rem;
    border-bottom: 1px solid var(--border);
}
.topic-tree-parent:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}
.topic-tree-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: .35rem .5rem;
}
.topic-tree-row-parent .topic-tree-name {
    font-weight: 600;
    font-size: 1rem;
}
.topic-tree-children {
    list-style: none;
    padding: 0;
    margin: .35rem 0 0 0;
}
.topic-tree-child {
    margin-left: 1.5rem;
    padding-left: 1rem;
    border-left: 3px solid var(--primary-light);
    background: var(--accent-bg);
    border-radius: 0 var(--radius) var(--radius) 0;
}
.topic-tree-row-child {
    padding: .45rem .65rem .45rem 0;
}
.topic-tree-row-child .topic-tree-name {
    font-weight: 500;
    color: var(--primary-dark, #333);
}
.topic-tree-branch {
    color: var(--muted);
    font-family: ui-monospace, monospace;
    font-size: .95rem;
    line-height: 1;
    flex-shrink: 0;
    width: 1rem;
    text-align: center;
}
.topic-tree-name { font-weight: 500; }
.topic-weight-field {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
    margin-left: auto;
}
.topic-weight-label {
    font-size: .82rem;
    color: var(--muted, #6c757d);
    font-weight: 400;
}
.topic-weight-input {
    width: 4.5rem;
    padding: .25rem .4rem;
    font-size: .9rem;
}
.topic-weights-actions { margin: .5rem 0 1rem; }
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.dynamic-rows { margin-bottom: .5rem; }
.dynamic-row {
    display: flex;
    gap: .5rem;
    align-items: flex-start;
    margin-bottom: .5rem;
}
.dynamic-row .row-remove {
    flex-shrink: 0;
    margin-top: .35rem;
}
.seq-creator-pos {
    flex-shrink: 0;
    min-width: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 2.25rem;
}

/* Matching question — Studio pair builder */
.match-pairs-builder-head { margin-bottom: .85rem; }
.match-pairs-builder-title,
.match-distractors-title {
    display: block;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: .25rem;
}
.match-pairs-builder-hint { margin: 0; font-size: .9rem; }
.match-pairs-list {
    display: flex;
    flex-direction: column;
    gap: .85rem;
    margin-bottom: .75rem;
}
.match-pair-card {
    background: #f8fbff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: .85rem 1rem 1rem;
    transition: box-shadow .15s, border-color .15s;
}
.match-pair-card.is-dragging {
    opacity: .65;
    box-shadow: var(--shadow);
}
.match-pair-card.is-drag-over {
    border-color: var(--primary-light);
}
.match-pair-card-toolbar {
    display: flex;
    align-items: center;
    gap: .65rem;
    margin-bottom: .75rem;
}
.match-pair-drag {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    color: var(--muted);
    cursor: grab;
    font-size: .95rem;
    line-height: 1;
}
.match-pair-drag:active { cursor: grabbing; }
.match-pair-num {
    font-size: .8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--primary);
}
.match-pair-remove { margin-left: auto; }
.match-pair-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
    gap: .75rem 1rem;
    align-items: start;
}
.match-pair-field-label {
    display: block;
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--muted);
    margin-bottom: .35rem;
}
.match-pair-arrow {
    align-self: center;
    padding-top: 1.5rem;
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--primary-light);
    line-height: 1;
}
.match-pair-textarea {
    min-height: 3rem;
    resize: vertical;
    line-height: 1.45;
}
.match-distractors-builder {
    margin-top: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border);
}
.match-distractors-list .match-distractor-row {
    align-items: stretch;
}
.match-distractors-list .match-pair-textarea {
    flex: 1;
    min-width: 0;
}
@media (max-width: 768px) {
    .match-pair-grid {
        grid-template-columns: 1fr;
    }
    .match-pair-arrow {
        padding-top: 0;
        text-align: center;
        transform: rotate(90deg);
    }
}
.star-rating .star { color: #ccc; }
.star-rating .star-on { color: #f0ad00; }
.star-rating-text { margin-left: .25rem; font-size: .95rem; color: var(--muted); }

.star-rating-input {
    display: flex;
    gap: .35rem;
}

.star-rating-input input { position: absolute; opacity: 0; width: 0; height: 0; }
.star-rating-input label { cursor: pointer; }
.star-rating-input .star { font-size: 1.75rem; color: #ccc; transition: color .15s; }
.star-rating-input label:hover .star,
.star-rating-input input:checked + .star,
.star-rating-input input:focus + .star { color: #f0ad00; }

/* Cloze author editor (Wizard / Studio) */
.cloze-editor-intro { margin-bottom: 1rem; }
.cloze-editor-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .5rem 1rem;
    margin-bottom: .5rem;
}
.cloze-editor-toolbar-hint { font-size: .88rem; }
.cloze-passage-editor {
    width: 100%;
    min-height: 8rem;
    max-height: 20rem;
    overflow-y: auto;
    padding: .65rem .85rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    line-height: 1.75;
    white-space: pre-wrap;
    word-break: break-word;
    font-size: 1rem;
    color: var(--text, #212529);
}
.cloze-passage-editor:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 2px rgba(13, 110, 253, .15);
}
/* Pills inside the passage must win over contenteditable defaults */
.cloze-passage-editor .cloze-pill,
.cloze-pill.cloze-pill--preview {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    vertical-align: middle;
    margin: 0 .2rem;
    padding: .2rem .65rem;
    min-height: 1.65em;
    border-radius: 999px;
    font-family: Roboto, system-ui, sans-serif;
    font-size: .8rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: .02em;
    text-transform: none;
    white-space: nowrap;
    cursor: default;
    user-select: none;
    -webkit-user-select: none;
    border: 1.5px solid;
    box-shadow: 0 1px 3px rgba(0, 0, 0, .1);
}
.cloze-passage-editor .cloze-pill::before {
    content: '▢';
    margin-right: .35em;
    font-size: .75em;
    font-weight: 400;
    opacity: .75;
}
.cloze-pill--preview {
    margin: 0;
    box-shadow: none;
}
.cloze-pill--preview::before {
    content: none;
}
.cloze-passage-editor .cloze-pill--c1,
.cloze-pill--preview.cloze-pill--c1 { background: #cfe2ff; color: #084298; border-color: #6ea8fe; }
.cloze-passage-editor .cloze-pill--c2,
.cloze-pill--preview.cloze-pill--c2 { background: #c8e6c9; color: #1b5e20; border-color: #66bb6a; }
.cloze-passage-editor .cloze-pill--c3,
.cloze-pill--preview.cloze-pill--c3 { background: #ffe0b2; color: #e65100; border-color: #ffb74d; }
.cloze-passage-editor .cloze-pill--c4,
.cloze-pill--preview.cloze-pill--c4 { background: #e1bee7; color: #6a1b9a; border-color: #ba68c8; }
.cloze-passage-editor .cloze-pill--c5,
.cloze-pill--preview.cloze-pill--c5 { background: #b2ebf2; color: #006064; border-color: #4dd0e1; }
.cloze-passage-editor .cloze-pill--c6,
.cloze-pill--preview.cloze-pill--c6 { background: #f8bbd0; color: #880e4f; border-color: #f06292; }
.cloze-blank-config { margin-top: 1.25rem; }
.cloze-blank-config-empty { margin: 0 0 .75rem; }
.cloze-blank-panel {
    padding: 1rem 1.1rem;
    margin-bottom: .85rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fafbfc;
}
.cloze-blank-panel-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
    margin-bottom: .75rem;
}
.cloze-blank-panel .form-group:last-child { margin-bottom: 0; }

.cloze-passage {
    line-height: 1.65;
    font-size: 1.05rem;
    margin-bottom: 1rem;
}
.cloze-blank-wrap {
    display: inline;
    vertical-align: baseline;
    white-space: normal;
}
.cloze-select {
    display: inline-block;
    vertical-align: baseline;
    min-width: 8rem;
    max-width: min(16rem, 100%);
    margin: 0 .12em;
    padding: .2rem 1.75rem .2rem .55rem;
    font-size: inherit;
    line-height: 1.35;
    border-radius: 999px;
    border: 1px solid var(--primary-light);
    background: #fff;
}
.cloze-passage .study-cloze-review {
    margin: 0 .08em;
}

.fib-passage {
    line-height: 1.65;
    margin-bottom: 1.25rem;
    font-size: 1.05rem;
}
.fib-marker {
    display: inline;
    margin: 0 .12em;
    padding: .08em .45em;
    border-radius: 999px;
    border: 1px solid var(--primary-light);
    background: var(--accent-bg);
    color: var(--primary);
    font-size: .72em;
    font-weight: 600;
    letter-spacing: .01em;
    vertical-align: baseline;
    white-space: nowrap;
    user-select: none;
    pointer-events: none;
}
.fib-marker-correct {
    border-color: var(--success);
    background: #e8f5e9;
    color: #146c43;
}
.fib-marker-incorrect {
    border-color: var(--danger);
    background: #fdecea;
    color: #842029;
}
.fib-answers {
    display: flex;
    flex-direction: column;
    gap: .75rem;
    padding-top: .25rem;
    border-top: 1px solid var(--border);
}
.fib-answer-row {
    display: grid;
    grid-template-columns: minmax(5.5rem, auto) 1fr;
    gap: .65rem 1rem;
    align-items: start;
    padding: .75rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
}
.fib-answer-row-correct {
    border-color: var(--success);
    background: #f4fbf6;
}
.fib-answer-row-incorrect {
    border-color: var(--danger);
    background: #fff8f7;
}
.fib-answer-label {
    font-weight: 600;
    color: var(--primary);
    padding-top: .45rem;
    margin: 0;
}
.fib-answer-input { max-width: 420px; }
.fib-answer-review { min-width: 0; }
.fib-answer-review--inline {
    font-size: 1.05rem;
    line-height: 1.5;
}
@media (max-width: 540px) {
    .fib-answer-row {
        grid-template-columns: 1fr;
        gap: .35rem;
    }
    .fib-answer-label { padding-top: 0; }
}

.dnd-bank {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    padding: .75rem;
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    margin-bottom: 1rem;
    min-height: 48px;
}

.dnd-item {
    padding: .4rem .75rem;
    background: var(--accent-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: grab;
    user-select: none;
}

.dnd-item.hidden { display: none; }

.dnd-zones {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.dnd-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: .5rem;
    min-height: 100px;
}

.dnd-zone-label {
    font-weight: 600;
    margin-bottom: .5rem;
    font-size: .95rem;
}

.dnd-zone-drop {
    min-height: 64px;
    padding: .35rem;
}

.dnd-zone-drop.dnd-over {
    background: var(--accent-bg);
    border-color: var(--primary-light);
}

.dnd-item.in-zone { margin-bottom: .35rem; cursor: grab; }

.study-dnd-zones .dnd-zone-drop {
    min-height: 64px;
}
.study-dnd-bank {
    margin-bottom: 1rem;
}
.study-dnd-item {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .35rem .5rem;
    cursor: default;
    border-width: 2px;
    margin-bottom: .35rem;
}
.study-dnd-item:last-child {
    margin-bottom: 0;
}
.study-dnd-item .mark {
    flex-shrink: 0;
}
.study-dnd-item-text {
    font-weight: 600;
}
.study-dnd-item.study-opt-correct-selected {
    border-color: var(--success);
    background: #f4faf6;
}
.study-dnd-item.study-opt-incorrect-selected {
    border-color: var(--danger);
    background: #f8d7da;
}
.matching-review-answer.study-opt-correct-selected {
    border-color: var(--success);
    background: #f4faf6;
}
.matching-review-answer.study-opt-incorrect-selected {
    border-color: var(--danger);
    background: #f8d7da;
}

.import-upload-card .import-or {
    text-align: center;
    margin: .5rem 0;
}
.import-textarea {
    font-family: ui-monospace, Consolas, monospace;
    font-size: .85rem;
    line-height: 1.45;
}
.import-format-guide summary {
    cursor: pointer;
    padding: .25rem 0;
}
.import-format-body {
    margin-top: .75rem;
    font-size: .95rem;
    line-height: 1.55;
}
.import-format-body code {
    font-size: .88em;
}
.import-error-list {
    margin: .5rem 0 0;
    padding-left: 1.25rem;
}
.import-preview-table {
    margin-top: 1rem;
}

/* Quiz detail page */
.quiz-detail .card + .card,
.quiz-detail .stats-row + .card,
.quiz-detail .stats-row + .quiz-detail-cta,
.quiz-detail .quiz-detail-cta + .card,
.quiz-detail .quiz-detail-cta + .alert,
.quiz-detail .alert + .card,
.quiz-detail .quiz-discussion-card + .quiz-thread-board,
.quiz-detail .card + .quiz-thread-board {
    margin-top: 1.25rem;
}
.quiz-detail-hero h1 { margin-bottom: .35rem; }
.quiz-detail-description { margin-top: 1rem; line-height: 1.55; }
.quiz-detail-dates { margin-top: .75rem; margin-bottom: 0; font-size: .9rem; }
.quiz-detail-stats {
    margin-top: 1.25rem;
    margin-bottom: 0;
    align-items: stretch;
}
.quiz-detail-stats .stat-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    height: 100%;
    min-width: 0;
}
.quiz-detail-stats .stat-box .lbl {
    margin-top: auto;
    padding-top: .75rem;
    width: 100%;
}
.quiz-detail-stat-types {
    min-width: 0;
}
.quiz-detail-stat-types .quiz-detail-type-chart {
    flex: 1 1 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .65rem;
    min-width: 0;
    width: 100%;
}
.quiz-detail-type-pie {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.06);
}
.quiz-detail-type-legend {
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: .72rem;
    line-height: 1.35;
    min-width: 0;
}
.quiz-detail-type-legend li {
    display: flex;
    align-items: baseline;
    gap: .3rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.quiz-detail-type-legend .quiz-topic-swatch {
    width: .55rem;
    height: .55rem;
    flex-shrink: 0;
}
.quiz-detail-topic-details {
    margin: 0;
}
.quiz-detail-topic-details > summary {
    cursor: pointer;
    list-style: none;
}
.quiz-detail-topic-details > summary::-webkit-details-marker {
    display: none;
}
.quiz-detail-topic-details > summary::before {
    content: '▸';
    display: inline-block;
    margin-right: .35rem;
    color: var(--muted);
    transition: transform .15s ease;
}
.quiz-detail-topic-details[open] > summary::before {
    transform: rotate(90deg);
}
.quiz-detail-topic-details > ul {
    margin: .35rem 0 .5rem 1rem;
    padding-inline-start: 1.15em;
}
.quiz-detail-cta {
    padding: 1rem 1.25rem;
    background: var(--accent-bg);
    border: 1px solid var(--border);
}
.quiz-detail-cta .btn-row { margin: 0; }
.quiz-detail-section h2 {
    font-size: 1.15rem;
    margin-bottom: .75rem;
}
.quiz-detail-dl {
    margin: 0;
    display: grid;
    gap: .65rem 1rem;
}
@media (min-width: 560px) {
    .quiz-detail-dl {
        grid-template-columns: 8rem 1fr;
    }
}
.quiz-detail-dl dt {
    font-weight: 600;
    margin: 0;
    color: var(--text);
}
.quiz-detail-dl dd { margin: 0; color: var(--muted); }
.quiz-detail-topic-list,
.quiz-detail-type-list,
.quiz-detail-personal-list {
    margin: 0;
    padding-inline-start: 1.15em;
    line-height: 1.6;
}
.quiz-detail-topic-list ul {
    margin: .35rem 0 .5rem;
    padding-inline-start: 1.15em;
}

.quiz-topic-charts {
    display: grid;
    gap: 1.5rem;
    margin: 0 0 1.25rem;
}

@media (min-width: 768px) {
    .quiz-topic-charts {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

.quiz-topic-chart-title {
    font-size: .95rem;
    font-weight: 600;
    margin: 0 0 .75rem;
    color: var(--primary-dark);
}

.quiz-topic-chart-body {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem 1.25rem;
}

.quiz-topic-pie {
    width: 148px;
    height: 148px;
    border-radius: 50%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.06);
}

.quiz-topic-pie-hole {
    width: 78px;
    height: 78px;
    border-radius: 50%;
    background: #fff;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    line-height: 1.15;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08);
}

.quiz-topic-pie-total {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--primary-dark);
}

.quiz-topic-pie-total-label {
    font-size: .68rem;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--muted);
}

.quiz-topic-chart-legend {
    list-style: none;
    margin: 0;
    padding: 0;
    flex: 1;
    min-width: 200px;
    font-size: .88rem;
    line-height: 1.45;
}

.quiz-topic-chart-legend li {
    display: flex;
    align-items: flex-start;
    gap: .5rem;
    margin-bottom: .45rem;
}

.quiz-topic-swatch {
    width: .75rem;
    height: .75rem;
    border-radius: 2px;
    flex-shrink: 0;
    margin-top: .28rem;
}

.quiz-blueprint-alignment {
    margin-top: 1.35rem;
    padding-top: 1.15rem;
    border-top: 1px solid var(--border);
}

.quiz-blueprint-note {
    font-size: .88rem;
    margin: 0 0 .75rem;
}

.quiz-blueprint-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .88rem;
}

.quiz-blueprint-table th,
.quiz-blueprint-table td {
    padding: .45rem .55rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.quiz-blueprint-table th {
    background: var(--accent-bg);
    font-weight: 600;
}

.quiz-blueprint-gap--ok { color: var(--success); }
.quiz-blueprint-gap--high { color: #b45309; }
.quiz-blueprint-gap--low { color: var(--danger); }

.quiz-detail-hero a {
    color: var(--primary-light);
    text-decoration: none;
    font-weight: 500;
}
.quiz-detail-hero a:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* Question discussion thread board (quiz detail) */
.quiz-thread-board {
    margin-top: 1.25rem;
    padding: 0;
}
.quiz-thread-board-header {
    margin-bottom: 1rem;
}
.quiz-thread-board-header h2 {
    font-size: 1.15rem;
    margin-bottom: .35rem;
}
.quiz-thread-feed {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.quiz-thread-item {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: linear-gradient(135deg, #fafcff 0%, #fff 55%);
    padding: 1rem 1.1rem 1.1rem;
    box-shadow: 0 1px 3px rgba(10, 77, 140, 0.06);
}
.quiz-thread-item-header {
    display: flex;
    gap: .75rem;
    align-items: flex-start;
    margin-bottom: .75rem;
}
.quiz-thread-qbadge {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2.25rem;
    height: 2.25rem;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    font-weight: 700;
    font-size: .8rem;
}
.quiz-thread-item-title {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.4;
}
.quiz-thread-preview {
    display: block;
    font-weight: 400;
    color: var(--muted);
    font-size: .9rem;
    margin-top: .2rem;
}
.quiz-thread-stats {
    margin: .25rem 0 0;
    font-size: .85rem;
}
.quiz-thread-messages {
    display: flex;
    flex-direction: column;
    gap: .65rem;
    padding-top: .25rem;
}
.quiz-thread-message {
    display: flex;
    gap: .55rem;
    align-items: flex-start;
    max-width: 92%;
}
.quiz-thread-message.is-right {
    align-self: flex-end;
    flex-direction: row-reverse;
}
.quiz-thread-message.is-right .quiz-thread-bubble {
    background: color-mix(in srgb, var(--primary) 8%, #fff);
    border-color: color-mix(in srgb, var(--primary) 22%, var(--border));
}
.quiz-thread-message.is-author .quiz-thread-avatar {
    background: var(--primary-dark);
}
.quiz-thread-avatar {
    flex-shrink: 0;
    width: 2rem;
    height: 2rem;
    border-radius: 999px;
    background: var(--muted);
    color: #fff;
    font-size: .72rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.quiz-thread-bubble {
    flex: 1;
    min-width: 0;
    padding: .55rem .75rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: #fff;
}
.quiz-thread-bubble-meta {
    font-size: .82rem;
    margin-bottom: .3rem;
    line-height: 1.35;
}
.quiz-thread-bubble-meta time {
    color: var(--muted);
    font-weight: 400;
}
.quiz-thread-bubble-body {
    font-size: .92rem;
    line-height: 1.5;
}
.quiz-thread-bubble-body p {
    margin: 0 0 .35rem;
}
.quiz-thread-bubble-body p:last-child {
    margin-bottom: 0;
}
.quiz-thread-board-footer {
    margin-top: 1rem;
    font-size: .9rem;
}

.quiz-discussion-card { margin-top: 1.25rem; }
.comment-thread {
    list-style: none;
    padding: 0;
    margin: 0 0 1rem;
}
.comment-item {
    padding: .75rem 0;
    border-bottom: 1px solid var(--border);
}
.comment-item:last-child { border-bottom: none; }
.comment-meta { font-size: .9rem; margin-bottom: .35rem; }
.comment-body { margin-bottom: .5rem; }
.comment-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .35rem;
}
.comment-score {
    font-weight: 600;
    min-width: 2rem;
    font-size: .9rem;
}
.comment-author-badge {
    display: inline-block;
    font-size: .7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .03em;
    padding: .1rem .4rem;
    border-radius: 4px;
    background: var(--primary-light);
    color: var(--primary);
    vertical-align: middle;
}
.comment-form textarea { width: 100%; margin-top: .5rem; }
.comment-actions .btn.active {
    border-color: var(--primary);
    color: var(--primary);
}
.study-struggle-hint {
    background: #fff8e6;
    border: 1px solid #f0d78c;
    border-radius: var(--radius);
    padding: .75rem 1rem;
    margin: 0 0 1rem;
    font-size: .95rem;
    line-height: 1.45;
}
.study-streak-note,
.study-enforce-note { margin: .75rem 0 0; font-size: .9rem; }
.demo-sample-note { font-size: .9rem; }
.demo-sample-note--footer {
    margin: 1.5rem 0 0;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    text-align: center;
}
.discussion-readonly-note {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    font-size: .9rem;
}

/* Demo preview results — full stats report + unlock overlay */
.demo-result-page {
    margin: 0 -0.5rem;
}
.demo-result-stats-stage {
    position: relative;
    min-height: 70vh;
}
.demo-result-stats-body {
    pointer-events: none;
    user-select: none;
    filter: blur(0.4px);
    opacity: 0.88;
}
.demo-result-stats-head .stats-page-head h1,
.demo-result-stats-head h1 {
    margin: 0 0 0.35rem;
}
.demo-result-sample-label {
    margin: 0 0 0.35rem;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--primary);
}

.demo-result-unlock-overlay {
    position: absolute;
    inset: 0;
    z-index: 20;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 2.5rem 1rem 3rem;
    background: rgba(248, 250, 252, 0.55);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    cursor: pointer;
}
.demo-result-unlock-overlay.is-dismissed {
    display: none;
}
.demo-result-stats-stage.is-report-revealed .demo-result-stats-body {
    pointer-events: auto;
    user-select: auto;
    filter: none;
    opacity: 1;
}
.demo-result-unlock-panel {
    position: relative;
    width: 100%;
    max-width: 520px;
    margin-top: min(8vh, 4rem);
    padding: 1.75rem 1.85rem;
    box-shadow: 0 12px 40px rgba(10, 77, 140, 0.18);
    border: 1px solid color-mix(in srgb, var(--primary) 18%, var(--border));
    pointer-events: auto;
    text-align: center;
    cursor: default;
}
.demo-result-unlock-close {
    position: absolute;
    top: 0.65rem;
    right: 0.65rem;
    width: 2rem;
    height: 2rem;
    padding: 0;
    border: none;
    border-radius: 999px;
    background: transparent;
    color: var(--muted);
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
}
.demo-result-unlock-close:hover {
    background: var(--surface-2, #f0f2f5);
    color: var(--text);
}
.demo-result-unlock-eyebrow {
    margin: 0 0 0.35rem;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--muted);
}
.demo-result-unlock-panel h2 {
    margin: 0 0 0.65rem;
    font-size: 1.35rem;
    color: var(--primary-dark);
    line-height: 1.25;
}
.demo-result-unlock-lead {
    margin: 0 0 1rem;
    font-size: 0.95rem;
    line-height: 1.5;
    color: var(--text);
    text-align: left;
}
.demo-result-unlock-preview-note {
    margin: 0 0 1.1rem;
    padding: 0.65rem 0.85rem;
    font-size: 0.85rem;
    line-height: 1.45;
    color: var(--muted);
    text-align: left;
    border-radius: var(--radius);
    background: var(--surface-2, #f4f6f8);
    border: 1px solid var(--border);
}
.demo-result-unlock-preview-note strong {
    color: var(--primary-dark);
    font-weight: 600;
}
.demo-result-unlock-features {
    margin: 0 0 1.25rem;
    text-align: left;
}
.demo-result-unlock-features-title {
    margin: 0 0 0.5rem;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--muted);
}
.demo-result-feature-checklist {
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 0.88rem;
    line-height: 1.4;
}
.demo-result-feature-checklist li {
    position: relative;
    padding: 0.28rem 0 0.28rem 1.35rem;
}
.demo-result-feature-checklist li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: 700;
}
.demo-result-unlock-actions {
    justify-content: center;
    margin-bottom: 0.75rem;
}
.demo-result-unlock-footer {
    margin: 0;
    font-size: 0.88rem;
}
.demo-result-unlock-footer a {
    color: var(--primary-light);
}

@media (max-width: 640px) {
    .demo-result-unlock-overlay {
        padding: 1.25rem 0.75rem 2rem;
        align-items: flex-start;
    }
    .demo-result-unlock-panel {
        margin-top: 1rem;
        padding: 1.35rem 1.2rem;
    }
}
.study-hide-offer { background: var(--accent-bg); }

.question-discussion-panel {
    max-width: 520px;
    max-height: 85vh;
    overflow-y: auto;
}
.question-discussion-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: .75rem;
    margin-bottom: 1rem;
}
.question-discussion-header h3 { margin: 0; }

@media (max-width: 768px) {
    .main-nav { font-size: .9rem; }
    .matching-row { grid-template-columns: 1fr; }
    .landing-hero h1 { font-size: 1.5rem; }
    .home-hero {
        padding: 1rem 0 1.25rem;
        margin-bottom: 1.25rem;
    }
    .home-title {
        font-size: 1.65rem;
        margin-bottom: .75rem;
    }
    .home-hero-stats {
        gap: .5rem 1.25rem;
        margin-bottom: 1.25rem;
        font-size: .88rem;
    }
    .home-hero-stat-value {
        font-size: 1.1rem;
    }
    .home-hero-stat-sep {
        display: none;
    }
    .home-lead {
        font-size: 1rem;
        margin-bottom: 1.25rem;
    }
    .home-search-primary {
        flex-wrap: wrap;
        gap: .5rem;
    }
    .home-search-primary .form-control {
        flex: 1 1 100%;
        width: 100%;
    }
    .home-search-primary .btn {
        flex: 1 1 calc(50% - .25rem);
        text-align: center;
    }
    .home-search-create {
        margin-top: .75rem;
    }
    .home-activity-list,
    .home-activity-list li,
    .home-activity-feed,
    .home-activity-feed li {
        padding-left: 0;
        margin-left: 0;
        -webkit-padding-start: 0;
    }
    .home-library-head {
        flex-direction: column;
        align-items: flex-start;
        gap: .35rem;
    }
    .quiz-link-list {
        column-count: 1 !important;
        padding-left: 0;
        margin-left: 0;
    }
    .quiz-link-list li {
        list-style: none;
        padding-left: 0;
        margin-left: 0;
    }
    .quiz-link-item {
        flex-direction: column;
        align-items: flex-start;
        gap: .2rem;
        padding: .65rem 0;
        border-bottom: 1px solid var(--border);
    }
    .home-search-category { max-width: none; width: 100%; }
    .home-create-inner { flex-direction: column; align-items: flex-start; }
    .dnd-zones { grid-template-columns: 1fr; }
}

/* Browse page */
.browse-page {
    max-width: 1140px;
    margin: 0 auto 2rem;
}

.browse-head {
    margin-bottom: 1rem;
}

.browse-title {
    font-size: clamp(1.45rem, 3.5vw, 1.85rem);
    color: var(--primary);
    margin: 0 0 .35rem;
    line-height: 1.25;
}

.browse-lead {
    margin: 0;
    font-size: .95rem;
}

.browse-search {
    margin-bottom: 1.25rem;
}

.browse-search-primary {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    padding: .5rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    box-shadow: 0 2px 8px rgba(8, 58, 107, 0.06);
}

.browse-search-primary .form-control {
    flex: 1 1 14rem;
    min-width: 0;
}

.browse-search-submit,
.browse-search-clear,
.browse-filters-toggle {
    flex-shrink: 0;
}

.browse-filters-toggle {
    display: none;
    align-items: center;
    gap: .4rem;
    position: relative;
}

.browse-filters-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.15rem;
    height: 1.15rem;
    padding: 0 .3rem;
    font-size: .68rem;
    font-weight: 700;
    color: #fff;
    background: var(--primary);
    border-radius: 999px;
}

.browse-layout {
    display: grid;
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 1.5rem;
    align-items: start;
}

.browse-sidebar {
    position: sticky;
    top: 5.5rem;
    align-self: start;
}

.browse-sidebar-inner {
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    box-shadow: 0 2px 8px rgba(8, 58, 107, 0.04);
}

.browse-sidebar-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
    margin-bottom: .85rem;
    padding-bottom: .65rem;
    border-bottom: 1px solid var(--border);
}

.browse-sidebar-title {
    margin: 0;
    font-size: .95rem;
    font-weight: 700;
    color: var(--primary);
}

.browse-drawer-close {
    display: none;
    align-items: center;
    justify-content: center;
    width: 2rem;
    height: 2rem;
    border: none;
    background: transparent;
    color: var(--muted);
    font-size: 1.1rem;
    cursor: pointer;
}

.browse-filter-group {
    margin-bottom: 1rem;
}

.browse-filter-group:last-of-type {
    margin-bottom: 0;
}

.browse-filter-group-label {
    margin: 0 0 .5rem;
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--muted);
}

.browse-filter-pills {
    display: flex;
    flex-direction: column;
    gap: .35rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.browse-filter-pill {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .5rem;
    padding: .45rem .65rem;
    font-size: .86rem;
    font-weight: 500;
    color: var(--text);
    text-decoration: none;
    background: #f8fbff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: border-color .15s, background .15s, color .15s;
}

.browse-filter-pill:hover {
    border-color: var(--primary-light);
    color: var(--primary);
    text-decoration: none;
}

.browse-filter-pill.is-active {
    color: #fff;
    background: var(--primary);
    border-color: var(--primary);
}

.browse-filter-pill.is-active .browse-filter-count {
    color: rgba(255, 255, 255, 0.85);
}

.browse-filter-count {
    font-size: .75rem;
    font-weight: 600;
    color: var(--muted);
    white-space: nowrap;
}

.browse-sidebar-apply {
    display: none;
    margin-top: 1rem;
    padding-top: .85rem;
    border-top: 1px solid var(--border);
}

.browse-drawer-apply {
    width: 100%;
    text-align: center;
}

.browse-drawer-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 190;
    background: rgba(15, 23, 42, 0.45);
}

body.browse-drawer-open .browse-drawer-backdrop {
    display: block;
}

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

.browse-results {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    overflow: hidden;
}

.browse-results-head {
    padding: 1rem 1.15rem .75rem;
    border-bottom: 1px solid var(--border);
    background: #f8fbff;
}

.browse-results-head h2 {
    margin: 0;
    font-size: 1.15rem;
    color: var(--primary);
}

.browse-results-count {
    margin: .25rem 0 0;
    font-size: .85rem;
}

.browse-results-subhead {
    margin: 0;
    padding: .85rem 1.15rem .35rem;
    font-size: .92rem;
    font-weight: 700;
    color: var(--primary);
}

.browse-result-list {
    display: flex;
    flex-direction: column;
}

.browse-result-card {
    position: relative;
    padding: .9rem 1.15rem;
    border-bottom: 1px solid var(--border);
}

.browse-result-card:last-child {
    border-bottom: none;
}

.browse-result-card-badge,
.browse-result-card-type {
    position: absolute;
    top: .75rem;
    right: 1rem;
}

.browse-result-card-type {
    background: #eef2f7;
    color: var(--muted);
    border: 1px solid var(--border);
}

.browse-result-card-title {
    display: block;
    padding-right: 5.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
    line-height: 1.35;
    margin-bottom: .45rem;
}

.browse-result-card-title:hover {
    text-decoration: underline;
}

.browse-result-card-metrics {
    display: flex;
    flex-wrap: wrap;
    gap: .35rem .85rem;
    margin-bottom: .25rem;
}

.browse-result-metric {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    font-size: .82rem;
    color: #64748b;
}

.browse-result-metric i {
    font-size: .75rem;
    opacity: .85;
}

.browse-result-card-tags {
    margin: .15rem 0 0;
    font-size: .8rem;
    color: var(--muted);
    line-height: 1.4;
}

.browse-empty {
    padding: 1.25rem 1.15rem;
}

.browse-foot {
    text-align: center;
    font-size: .9rem;
    margin-top: 1rem;
}

@media (max-width: 767px) {
    .browse-filters-toggle {
        display: inline-flex;
    }

    .browse-layout {
        display: block;
    }

    .browse-sidebar {
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 200;
        top: auto;
        max-height: 85vh;
        transform: translateY(100%);
        transition: transform .25s ease;
    }

    body.browse-drawer-open .browse-sidebar {
        transform: translateY(0);
    }

    .browse-sidebar-inner {
        max-height: 85vh;
        overflow-y: auto;
        border-radius: 16px 16px 0 0;
        border-bottom: none;
        box-shadow: 0 -8px 30px rgba(15, 23, 42, 0.18);
    }

    .browse-drawer-close {
        display: inline-flex;
    }

    .browse-sidebar-apply {
        display: block;
    }

    .browse-filter-pills {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .browse-filter-pill {
        flex: 0 1 auto;
        justify-content: flex-start;
    }

    .browse-search-primary .form-control {
        flex: 1 1 100%;
    }

    .browse-search-primary .btn {
        flex: 1 1 calc(50% - .25rem);
        text-align: center;
    }

    .browse-filters-toggle,
    .browse-search-clear {
        flex: 1 1 calc(50% - .25rem);
    }

    .browse-result-list {
        gap: .65rem;
        padding: .75rem;
        background: #f4f7fa;
    }

    .browse-result-card {
        padding: 1rem;
        border: 1px solid var(--border);
        border-radius: var(--radius);
        background: #fff;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    }

    .browse-result-card-title {
        padding-right: 4.75rem;
        font-size: .95rem;
    }

    .browse-result-card-metrics {
        gap: .5rem .75rem;
    }

    .browse-result-metric {
        font-size: .75rem;
    }

    .browse-result-card-tags {
        font-size: .75rem;
    }

    .browse-results {
        border: none;
        background: transparent;
        overflow: visible;
    }

    .browse-results-head {
        padding: 0 0 .75rem;
        border: none;
        background: transparent;
    }

    .browse-results-subhead {
        padding: .5rem 0 .35rem;
    }

    .browse-empty {
        padding: 1rem 0;
    }
}

/* IT certification picker */
.cert-picker { margin: 1rem 0; padding-top: .5rem; border-top: 1px solid var(--border); }

.home-results-subhead { margin: 1.25rem 0 .5rem; font-size: 1rem; }
.content-type-badge {
    display: inline-block;
    font-size: .7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--primary);
}

/* Demo setup locked options */
.demo-setup .setup-advanced-toggle--locked { opacity: .72; }
.demo-setup-advanced { margin-top: 1rem; }
.setup-demo-locked-note { padding: .75rem; background: #f8f9fb; border-radius: var(--radius); }

/* Flashcard study */
.flashcard-study-wrap { max-width: 42rem; margin: 0 auto; text-align: center; }
.flashcard-progress { margin-bottom: 1rem; }
.flashcard-scene { perspective: 1200px; margin: 1.5rem 0; }
.flashcard-flip-btn {
    display: block; width: 100%; border: none; background: transparent; padding: 0; cursor: pointer;
}
.flashcard {
    position: relative; width: 100%; min-height: 16rem; transform-style: preserve-3d;
    transition: transform .5s ease;
}
.flashcard.is-flipped { transform: rotateY(180deg); }
.flashcard-face {
    position: absolute; inset: 0; backface-visibility: hidden; border-radius: var(--radius);
    border: 1px solid var(--border); background: #fff; box-shadow: 0 4px 20px rgba(0,0,0,.08);
    padding: 1.5rem; display: flex; flex-direction: column; justify-content: center; text-align: left;
}
.flashcard-back { transform: rotateY(180deg); background: #f8fafc; }
.flashcard-label { font-size: .75rem; font-weight: 600; text-transform: uppercase; color: var(--muted); margin-bottom: .75rem; }
.flashcard-content { font-size: 1.1rem; line-height: 1.5; flex: 1; }
.flashcard-hint { margin-top: 1rem; font-size: .85rem; }
.flashcard-nav { justify-content: center; margin-top: 1rem; }
.flashcard-guest-cta { margin-top: 1.5rem; }
.related-flashcards { margin-top: 1.5rem; }
.cert-badge { margin: .35rem 0 .75rem; }

/* Quiz hub */
.quiz-hub {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}
.quiz-hub .card { box-shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 8px rgba(0,0,0,.04); }
.quiz-hub-meta { padding: 1.5rem 1.75rem; }
.quiz-hub-meta-eyebrow {
    display: flex;
    align-items: center;
    gap: .5rem;
    flex-wrap: wrap;
    font-size: .78rem;
    color: var(--muted);
    margin-bottom: .35rem;
}
.quiz-hub-meta h1 {
    font-size: 1.55rem;
    font-weight: 800;
    letter-spacing: -.5px;
    line-height: 1.25;
    margin: 0 0 .35rem;
}
.quiz-hub-meta-sub { font-size: .85rem; margin: 0 0 .5rem; }
.quiz-hub-description { margin-top: .5rem; line-height: 1.55; }
.quiz-hub-stat-pills {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex-wrap: wrap;
    padding-top: .75rem;
    border-top: 1px solid var(--border);
    margin-top: .75rem;
}
.quiz-hub-stat-pill { display: flex; align-items: baseline; gap: .3rem; }
.quiz-hub-stat-pill .num { font-size: 1.05rem; font-weight: 700; }
.quiz-hub-stat-pill .lbl { font-size: .78rem; color: var(--muted); }
.quiz-hub-stat-divider { width: 1px; height: 18px; background: var(--border); }

.quiz-hub-chooser-label {
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--muted);
    padding: 0 .25rem;
    margin: 0;
}
.quiz-hub-modes {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: .75rem;
}
.quiz-hub-mode {
    background: #fff;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    padding: 1.1rem 1rem 1rem;
    cursor: pointer;
    transition: border-color .15s, box-shadow .15s, transform .1s;
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: .3rem;
    position: relative;
    box-shadow: 0 1px 3px rgba(0,0,0,.08);
    font: inherit;
    color: inherit;
    width: 100%;
}
.quiz-hub-mode:hover {
    box-shadow: 0 4px 24px rgba(0,0,0,.13);
    transform: translateY(-2px);
}
.quiz-hub-mode--exam {
    border-color: var(--primary);
    background: linear-gradient(135deg, #0a4d8c, #1a75c5);
    color: #fff;
}
.quiz-hub-mode--exam .quiz-hub-mode-kicker,
.quiz-hub-mode--exam .quiz-hub-mode-sub { color: rgba(255,255,255,.72); }
.quiz-hub-mode--study { border-color: #198754; }
.quiz-hub-mode--study .quiz-hub-mode-icon { color: #198754; }
.quiz-hub-mode--readiness { border-color: #d97706; }
.quiz-hub-mode--readiness .quiz-hub-mode-icon { color: #d97706; }
.quiz-hub-mode--flash {
    border-color: #6f42c1;
    background: linear-gradient(135deg, #5a32a3, #7c5bc4);
    color: #fff;
}
.quiz-hub-mode--flash .quiz-hub-mode-kicker,
.quiz-hub-mode--flash .quiz-hub-mode-sub { color: rgba(255,255,255,.72); }
.quiz-hub-mode--guest-demo { overflow: hidden; }
.quiz-hub-demo-ribbon {
    position: absolute;
    top: .65rem;
    right: -.35rem;
    background: #ffc107;
    color: #1a1a1a;
    font-size: .65rem;
    font-weight: 800;
    text-transform: uppercase;
    padding: .2rem 1.1rem;
    transform: rotate(12deg);
    box-shadow: 0 2px 6px rgba(0,0,0,.2);
}
.quiz-hub-exam-confirm-icon--green {
    background: #e8f5ee;
    color: #198754;
}
.quiz-hub-mode-icon { font-size: 1.3rem; margin-bottom: .1rem; }
.quiz-hub-mode-kicker {
    font-size: .68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--muted);
}
.quiz-hub-mode-title { font-size: .95rem; font-weight: 700; line-height: 1.2; }
.quiz-hub-mode-sub { font-size: .76rem; line-height: 1.4; color: var(--muted); margin-top: .1rem; }
.quiz-hub-mode-badge {
    display: inline-flex;
    align-self: flex-start;
    font-size: .65rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: .15rem .45rem;
    border-radius: 99px;
    margin-top: .35rem;
    background: #e8f5ee;
    color: #198754;
}
.quiz-hub-mode-progress {
    margin-top: .5rem;
    padding-top: .5rem;
    border-top: 1px solid rgba(255,255,255,.2);
}
.quiz-hub-mode-progress-bar {
    height: 3px;
    background: rgba(255,255,255,.2);
    border-radius: 99px;
    overflow: hidden;
    margin-bottom: .3rem;
}
.quiz-hub-mode-progress-bar span {
    display: block;
    height: 100%;
    background: rgba(255,255,255,.85);
    border-radius: 99px;
}
.quiz-hub-mode-progress-label { font-size: .68rem; color: rgba(255,255,255,.65); }
.quiz-hub-mode-arrow {
    position: absolute;
    bottom: .9rem;
    right: .9rem;
    font-size: .7rem;
    opacity: .45;
}
.quiz-hub-gauge { margin-top: .35rem; width: 100%; max-width: 120px; }
.quiz-hub-gauge svg { width: 100%; height: auto; display: block; }
.quiz-hub-gauge-track { stroke: var(--border); }
.quiz-hub-gauge-fill { stroke: #d97706; stroke-linecap: round; }
.quiz-hub-mode--readiness .quiz-hub-gauge-fill { stroke: #d97706; }
.quiz-hub-mode--exam .quiz-hub-gauge-track { stroke: rgba(255,255,255,.25); }
.quiz-hub-gauge-num { fill: currentColor; font-size: 18px; font-weight: 700; }
.quiz-hub-gauge.is-empty .quiz-hub-gauge-track { opacity: .5; }

.quiz-hub-collapsible summary {
    list-style: none;
    cursor: pointer;
    padding: 1rem 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: .6rem;
}
.quiz-hub-collapsible summary::-webkit-details-marker { display: none; }
.quiz-hub-collapsible summary::after {
    content: '\f078';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    margin-left: auto;
    color: var(--muted);
    font-size: .8rem;
    transition: transform .2s;
}
.quiz-hub-collapsible details[open] summary::after { transform: rotate(180deg); }
.quiz-hub-collapsible-body { padding: 0 1.5rem 1.25rem; }

.quiz-hub-topic-bars {
    display: grid;
    gap: 1.5rem;
    margin-bottom: 1rem;
}
@media (min-width: 640px) {
    .quiz-hub-topic-bars { grid-template-columns: 1fr 1fr; }
}
.quiz-hub-topic-group-title {
    font-size: .78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .05em;
    color: var(--muted);
    margin: 0 0 .75rem;
}
.quiz-hub-topic-row { margin-bottom: .65rem; }
.quiz-hub-topic-row-head {
    display: flex;
    align-items: center;
    gap: .5rem;
    font-size: .83rem;
    margin-bottom: .25rem;
}
.quiz-hub-topic-swatch { width: 10px; height: 10px; border-radius: 3px; flex-shrink: 0; }
.quiz-hub-topic-row-head .quiz-hub-topic-name { flex: 1; min-width: 0; }
.quiz-hub-topic-pct { color: var(--muted); font-size: .78rem; }
.quiz-hub-topic-track {
    height: 5px;
    background: var(--accent-bg);
    border-radius: 99px;
    overflow: hidden;
}
.quiz-hub-topic-fill { height: 100%; border-radius: 99px; }
.quiz-hub-topic-list { border-top: 1px solid var(--border); padding-top: 1rem; }
.quiz-hub-topic-details {
    display: block;
    width: 100%;
    margin-bottom: .35rem;
}
.quiz-hub-topic-details summary {
    font-size: .875rem;
    font-weight: 600;
    padding: .4rem 0;
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: baseline;
    gap: .35rem;
    width: 100%;
    box-sizing: border-box;
}
.quiz-hub-topic-details summary::-webkit-details-marker { display: none; }
.quiz-hub-topic-details summary::before {
    content: '\203A';
    display: inline-block;
    flex-shrink: 0;
    width: 14px;
    color: var(--muted);
    transition: transform .15s;
}
.quiz-hub-topic-details[open] summary::before { transform: rotate(90deg); }
.quiz-hub-topic-list .quiz-hub-topic-name {
    flex: 1;
    min-width: 0;
    font-weight: 600;
}
.quiz-hub-topic-list .quiz-hub-topic-count {
    flex-shrink: 0;
    font-size: .78rem;
    font-weight: 500;
    color: var(--muted);
    text-align: right;
    white-space: nowrap;
    min-width: 6.5rem;
}
.quiz-hub-topic-flat {
    display: flex;
    align-items: baseline;
    gap: .75rem;
    width: 100%;
    box-sizing: border-box;
    margin: .4rem 0;
    padding-left: calc(14px + .35rem);
    font-size: .875rem;
}
.quiz-hub-subtopic-list {
    list-style: none;
    padding: .35rem 0 .5rem 1.5rem;
    margin: 0;
}
.quiz-hub-subtopic-list li {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: .75rem;
    font-size: .82rem;
    padding: .2rem 0;
    border-bottom: 1px solid var(--border);
}
.quiz-hub-subtopic-list li > span:first-child {
    flex: 1;
    min-width: 0;
}
.quiz-hub-subtopic-list li > span:last-child {
    flex-shrink: 0;
    text-align: right;
    white-space: nowrap;
    min-width: 2.5rem;
}
.quiz-hub-subtopic-list li:last-child { border-bottom: none; }

.quiz-hub-utility {
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex-wrap: wrap;
}
.quiz-hub-utility-group { display: flex; align-items: center; gap: .5rem; font-size: .83rem; }
.quiz-hub-utility-group a { font-weight: 600; color: var(--primary); text-decoration: none; }
.quiz-hub-utility-group a:hover { text-decoration: underline; }
.quiz-hub-stars { display: flex; gap: .15rem; }
.quiz-hub-stars label { cursor: pointer; margin: 0; }
.quiz-hub-stars input { position: absolute; opacity: 0; pointer-events: none; }
.quiz-hub-stars i { color: #d1d5db; font-size: 1.05rem; transition: color .1s; }
.quiz-hub-stars label:has(input:checked) i,
.quiz-hub-stars label:has(~ label input:checked) i { color: #f59e0b; }
.quiz-hub-stars:hover i { color: #f59e0b; }
.quiz-hub-stars label:hover ~ label i { color: #d1d5db; }
.quiz-hub-utility-actions { margin-left: auto; display: flex; gap: .5rem; flex-wrap: wrap; }

.quiz-hub-sheet-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 20, 35, .5);
    z-index: 1200;
    opacity: 0;
    transition: opacity .25s;
    backdrop-filter: blur(2px);
}
.quiz-hub-sheet-overlay.is-open { opacity: 1; }
body.quiz-hub-sheet-open { overflow: hidden; }
.quiz-hub-sheet {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) translateY(100%);
    width: 100%;
    max-width: 600px;
    background: #fff;
    border-radius: 20px 20px 0 0;
    box-shadow: 0 -8px 40px rgba(0,0,0,.18);
    z-index: 1300;
    transition: transform .3s cubic-bezier(.32,.72,0,1);
    max-height: 92vh;
    overflow-y: auto;
    overscroll-behavior: contain;
}
.quiz-hub-sheet.is-open { transform: translateX(-50%) translateY(0); }
.quiz-hub-sheet-handle {
    width: 36px;
    height: 4px;
    background: var(--border);
    border-radius: 99px;
    margin: .75rem auto 0;
}
.quiz-hub-sheet-header {
    padding: 1rem 1.5rem .75rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    background: #fff;
    z-index: 1;
}
.quiz-hub-sheet-header-left { display: flex; align-items: center; gap: .75rem; }
.quiz-hub-sheet-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.quiz-hub-sheet-icon--blue { background: #e8f0fe; color: var(--primary); }
.quiz-hub-sheet-icon--green { background: #e8f5ee; color: #198754; }
.quiz-hub-sheet-icon--yellow { background: #fef3c7; color: #d97706; }
.quiz-hub-sheet-icon--purple { background: #f0ebff; color: #6f42c1; }
.quiz-hub-sheet-title { font-size: 1rem; font-weight: 700; margin: 0; }
.quiz-hub-sheet-subtitle { font-size: .78rem; margin: 0; }
.quiz-hub-sheet-close {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--accent-bg);
    border: none;
    cursor: pointer;
    color: var(--muted);
}
.quiz-hub-sheet-body { padding: 1.25rem 1.5rem; display: flex; flex-direction: column; gap: 1.25rem; }
.quiz-hub-sheet-section-label {
    font-size: .72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .07em;
    color: var(--muted);
    margin-bottom: .5rem;
}
.quiz-hub-sheet-footer {
    padding: 1rem 1.5rem 1.5rem;
    border-top: 1px solid var(--border);
    position: sticky;
    bottom: 0;
    background: #fff;
    display: flex;
    gap: .75rem;
    align-items: center;
    flex-wrap: wrap;
}
.quiz-hub-sheet-form--full { flex: 1; width: 100%; }
.quiz-hub-sheet-start { flex: 1; justify-content: center; }
.quiz-hub-sheet-start--green { background: #198754; border-color: #198754; }
.quiz-hub-sheet-start--purple { background: #6f42c1; border-color: #6f42c1; }
.quiz-hub-sheet-footer-meta { font-size: .78rem; }

.quiz-hub-exam-confirm {
    text-align: center;
    align-items: center;
    gap: 1rem;
}
.quiz-hub-exam-confirm-icon {
    width: 60px;
    height: 60px;
    border-radius: 18px;
    background: #e8f0fe;
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    margin: 0 auto;
}
.quiz-hub-exam-confirm h4 { margin: 0; font-size: 1.1rem; }
.quiz-hub-exam-specs {
    display: flex;
    gap: 1rem;
    background: var(--accent-bg);
    border-radius: var(--radius);
    padding: .75rem 1.25rem;
    justify-content: center;
    flex-wrap: wrap;
    width: 100%;
}
.quiz-hub-exam-spec { display: flex; flex-direction: column; align-items: center; gap: .1rem; }
.quiz-hub-exam-spec .val { font-weight: 700; }
.quiz-hub-exam-spec .lbl { font-size: .72rem; color: var(--muted); }

.quiz-hub-pool-summary {
    display: flex;
    gap: 1.5rem;
    background: var(--accent-bg);
    border-radius: var(--radius);
    padding: .75rem 1rem;
}
.quiz-hub-pool-stat { display: flex; flex-direction: column; }
.quiz-hub-pool-stat .num { font-weight: 700; font-size: 1.1rem; }
.quiz-hub-pool-stat .lbl { font-size: .72rem; color: var(--muted); }
.quiz-hub-toggle-group {
    display: flex;
    background: var(--accent-bg);
    border-radius: var(--radius);
    padding: 3px;
    gap: 3px;
}
.quiz-hub-toggle-option {
    flex: 1;
    padding: .45rem .5rem;
    border-radius: 7px;
    border: none;
    background: none;
    font: inherit;
    font-size: .83rem;
    color: var(--muted);
    cursor: pointer;
}
.quiz-hub-toggle-option.is-active {
    background: #fff;
    color: var(--text);
    font-weight: 600;
    box-shadow: 0 1px 4px rgba(0,0,0,.1);
}
.quiz-hub-domain-list { display: flex; flex-direction: column; gap: .4rem; }
.quiz-hub-domain-item {
    display: flex;
    align-items: center;
    gap: .75rem;
    padding: .5rem .75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
}
.quiz-hub-domain-item:has(.quiz-hub-domain-check:checked) {
    border-color: var(--primary);
    background: #e8f0fe;
}
.quiz-hub-domain-swatch { width: 8px; height: 8px; border-radius: 2px; flex-shrink: 0; }
.quiz-hub-domain-name { flex: 1; font-size: .85rem; font-weight: 500; }
.quiz-hub-domain-count { font-size: .78rem; }
.quiz-hub-intel-list { display: flex; flex-direction: column; gap: .35rem; }
.quiz-hub-intel-item {
    display: flex;
    align-items: flex-start;
    gap: .75rem;
    padding: .6rem .75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
}
.quiz-hub-intel-item:has(input:checked) {
    border-color: #198754;
    background: #e8f5ee;
}
.quiz-hub-intel-item.is-locked { opacity: .65; cursor: not-allowed; }
.quiz-hub-intel-label { font-size: .85rem; font-weight: 600; display: block; }
.quiz-hub-intel-desc { font-size: .76rem; line-height: 1.4; display: block; }
.quiz-hub-quality-note { font-size: .72rem; margin-top: .35rem; }

.quiz-hub-readiness-hero {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex-wrap: wrap;
}
.quiz-hub-readiness-hero .quiz-hub-gauge { max-width: 140px; flex-shrink: 0; }
.quiz-hub-readiness-band { font-size: 1.35rem; font-weight: 800; }
.quiz-hub-readiness-score { font-size: .95rem; }
.quiz-hub-readiness-subscores {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: .65rem;
}
.quiz-hub-readiness-tile {
    background: var(--accent-bg);
    border-radius: var(--radius);
    padding: .65rem .75rem;
    text-align: center;
}
.quiz-hub-readiness-tile .num { display: block; font-size: 1.2rem; font-weight: 700; }
.quiz-hub-readiness-tile .lbl { font-size: .72rem; color: var(--muted); }
.quiz-hub-readiness-deficits {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: .5rem;
}
.quiz-hub-deficit {
    padding: .6rem .75rem;
    border-radius: var(--radius);
    font-size: .85rem;
    border-left: 3px solid var(--border);
    background: var(--accent-bg);
}
.quiz-hub-deficit--error { border-left-color: #dc3545; }
.quiz-hub-deficit--warning { border-left-color: #d97706; }
.quiz-hub-deficit--info { border-left-color: var(--primary); }
.quiz-hub-readiness-empty { text-align: center; padding: .5rem 0; }
.quiz-hub-readiness-empty .quiz-hub-gauge { margin: 0 auto .75rem; }

.quiz-hub-deck-list { display: flex; flex-direction: column; gap: .5rem; }
.quiz-hub-deck-item {
    display: flex;
    align-items: center;
    gap: .9rem;
    padding: .75rem 1rem;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    text-decoration: none;
    color: inherit;
    transition: border-color .15s, background .15s;
}
.quiz-hub-deck-item:hover { border-color: #6f42c1; background: #f0ebff; }
.quiz-hub-deck-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: #f0ebff;
    color: #6f42c1;
    display: flex;
    align-items: center;
    justify-content: center;
}
.quiz-hub-deck-title { font-weight: 600; font-size: .9rem; }
.quiz-hub-deck-meta { font-size: .76rem; }
.quiz-hub-deck-arrow { color: var(--muted); margin-left: auto; }
.quiz-hub-flash-note { font-size: .83rem; line-height: 1.5; }
.quiz-hub-demo-mode-pick {
    display: flex;
    gap: 1rem;
    margin-bottom: .75rem;
    width: 100%;
    justify-content: center;
}

@media (max-width: 700px) {
    .quiz-hub-modes { grid-template-columns: 1fr 1fr; }
    .quiz-hub-utility { flex-direction: column; align-items: flex-start; }
    .quiz-hub-utility-actions { margin-left: 0; }
}
@media (max-width: 420px) {
    .quiz-hub-modes { grid-template-columns: 1fr; }
}