/* app.css */
@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&family=Noto+Serif+SC:wght@400;600;700&display=swap');

:root {
    --ink: #102432;
    --ink-soft: #516471;
    --paper: #fbf7ef;
    --paper-strong: #f0e2c8;
    --paper-muted: rgba(255, 255, 255, 0.92);
    --accent: #bf5b39;
    --accent-strong: #8e351b;
    --accent-muted: rgba(191, 91, 57, 0.12);
    --teal: #1f6b74;
    --teal-muted: rgba(31, 107, 116, 0.1);
    --gold: #d8a54a;
    --gold-muted: rgba(216, 165, 74, 0.15);
    --success: #2f8565;
    --warning: #b56d20;
    --line: rgba(16, 36, 50, 0.08);
    --shadow-sm: 0 4px 12px rgba(16, 36, 50, 0.06);
    --shadow-md: 0 12px 32px rgba(16, 36, 50, 0.1);
    --shadow-lg: 0 24px 48px rgba(16, 36, 50, 0.12);
    --radius-xl: 28px;
    --radius-lg: 20px;
    --radius-md: 16px;
    --radius-sm: 12px;
    --card-gap: 24px;
    --card-padding-sm: 16px;
    --card-padding-md: 20px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: 'Manrope', 'Segoe UI', sans-serif;
    color: var(--ink);
    background: linear-gradient(135deg, #faf6ed 0%, #f2ede3 100%);
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: radial-gradient(circle at 0% 0%, rgba(216, 165, 74, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 100% 100%, rgba(31, 107, 116, 0.06) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.hidden {
    display: none !important;
}

.shell {
    position: relative;
    z-index: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: 32px 24px 64px;
}

.hero,
.page-layout,
.report-layout {
    display: grid;
    gap: var(--card-gap);
    margin-bottom: var(--card-gap);
}

.top-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: var(--card-gap);
    padding: 14px 18px;
    border-radius: var(--radius-xl);
    background: rgba(255, 255, 255, 0.86);
    border: 1px solid rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow-sm);
    flex-wrap: nowrap;
}

.brand-lockup {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--ink);
    text-decoration: none;
    flex-shrink: 0; 
}

.brand-lockup strong,
.brand-lockup small {
    display: block;
    white-space: nowrap;
}

.brand-lockup small {
    color: var(--ink-soft);
}

.brand-mark {
    display: inline-grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--accent), var(--teal));
    color: white;
    font-weight: 800;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.nav-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 14px;
    border-radius: 999px;
    color: var(--ink);
    text-decoration: none;
    background: rgba(16, 36, 50, 0.05);
    border: 1px solid rgba(16, 36, 50, 0.08);
    transition: transform 0.2s ease, background 0.2s ease;
    white-space: nowrap; 
    font-size: 0.9rem;
    flex-shrink: 1;
}

.nav-links a:hover {
    transform: translateY(-1px);
    background: rgba(31, 107, 116, 0.1);
}

.hero {
    grid-template-columns: 1.5fr 0.5fr;
}

.page-layout {
    grid-template-columns: 1.8fr 0.5fr;
    align-items: start;
}

.report-layout {
    grid-template-columns: 0.7fr 1.3fr;
    align-items: start;
}

.hero-card,
.panel,
.side-card,
.report-card,
.stage-item,
.metric-card,
.trace-card,
.result-banner,
.explanation-card,
.empty-state,
.note-banner,
.stage-summary-card {
    background: var(--paper-muted);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    padding: var(--card-padding-md);
}

.metric-card,
.stage-summary-card,
.trace-card,
.result-banner,
.explanation-card {
    padding: var(--card-padding-sm);
}

.panel,
.side-card,
.hero-card {
    margin-bottom: 0;
}

.hero-card:hover,
.panel:hover,
.side-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.hero-card {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(255,255,255,0.96) 0%, rgba(251,247,239,0.94) 100%);
}

.hero-card::after {
    content: '';
    position: absolute;
    right: -40px;
    top: -40px;
    width: 240px;
    height: 240px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--gold-muted), var(--teal-muted));
    opacity: 0.6;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 4px 12px;
    border-radius: 999px;
    background: var(--accent-muted);
    color: var(--accent-strong);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.hero h1,
.panel h2,
.side-card h2,
.report-card h2,
.page-title {
    font-family: 'Noto Serif SC', serif;
    font-weight: 700;
    margin-top: 0;
    margin-bottom: 12px;
}

.hero h1 {
    font-size: clamp(1.5rem, 3.5vw, 2.5rem);
    line-height: 1.2;
    margin: 12px 0 10px;
    max-width: none;
    background: linear-gradient(135deg, var(--ink) 0%, var(--teal) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    white-space: nowrap;
    overflow: visible;
}

.hero p,
.side-card p,
.report-card p,
.result-banner p,
.explanation-card p,
.trace-card p,
.empty-state,
.note-banner {
    margin: 0 0 8px 0;
    color: var(--ink-soft);
    line-height: 1.5;
    font-size: 0.9rem;
}

.hero-metrics,
.summary-grid,
.quick-grid {
    display: grid;
    gap: 12px;
}

.hero-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 16px;
}

.hero-metric,
.status-item,
.metric-card,
.stage-summary-card {
    padding: 12px;
    border-radius: var(--radius-md);
    background: rgba(251, 247, 239, 0.96);
    border: 1px solid rgba(16, 36, 50, 0.06);
    transition: all 0.2s ease;
}

.hero-metric:hover,
.metric-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    border-color: rgba(31, 107, 116, 0.2);
}

.hero-metric strong {
    font-size: 28px;
    margin-bottom: 4px;
    display: block;
    background: linear-gradient(135deg, var(--teal), var(--accent));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-metric span,
.status-item small,
.metric-card span,
.help-text,
.stage-meta {
    color: var(--ink-soft);
    font-size: 12px;
    font-weight: 500;
}

.hero-actions,
.actions,
.tab-row,
.inline-actions,
.stage-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 12px;
}

.compact {
    margin-bottom: 0;
}

.side-card {
    display: grid;
    gap: 16px;
    align-content: start;
}

.panel-head,
.report-head,
.panel-toolbar,
.section-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--gold-muted);
}

.section-toolbar {
    margin-bottom: 12px;
}

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

.chip,
.inline-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 999px;
    background: var(--teal-muted);
    color: var(--teal);
    font-size: 11px;
    font-weight: 700;
}

.question-card {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-xl);
    padding: 24px 28px;
    background: linear-gradient(135deg, #ffffff 0%, rgba(255,255,255,0.98) 100%);
    border: 1px solid rgba(16, 36, 50, 0.06);
    box-shadow: var(--shadow-md);
    width: 100%;
}

.progress-card {
    padding: 16px 18px;
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.84);
    border: 1px solid rgba(16, 36, 50, 0.08);
    box-shadow: var(--shadow-sm);
    margin-bottom: 18px;
}

.progress-card-head,
.record-card-head,
.record-actions-row,
.record-meta-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: wrap;
}

.bar-track.large {
    height: 12px;
    margin-top: 10px;
}

.question-card::before {
    content: '';
    position: absolute;
    inset: 0 0 auto 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--gold), var(--teal));
}

.question-card h3 {
    margin: 12px 0 16px;
    font-size: clamp(1.2rem, 2.2vw, 1.6rem);
    line-height: 1.4;
    color: var(--ink);
}

.question-meta,
.status-grid,
.stack,
.report-grid,
.report-stack,
.report-section,
.radar-list,
.trace-path,
.clause-list,
.highlight-list,
.stage-list,
.options-grid {
    display: grid;
    gap: 12px;
}

.question-meta {
    color: var(--ink-soft);
    display: flex;
    flex-wrap: wrap;
    font-size: 13px;
    gap: 12px;
}

.options-grid {
    margin-top: 20px;
}

.option-card {
    display: grid;
    grid-template-columns: auto auto 1fr;
    gap: 12px;
    align-items: start;
    padding: 12px 16px;
    border-radius: var(--radius-md);
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.95);
    cursor: pointer;
    transition: all 0.2s ease;
}

.option-card:hover {
    transform: translateX(4px);
    border-color: var(--teal);
    box-shadow: var(--shadow-sm);
    background: white;
}

.option-card input {
    margin-top: 2px;
    accent-color: var(--accent);
}

.option-letter {
    display: inline-grid;
    place-items: center;
    width: 28px;
    height: 28px;
    border-radius: 10px;
    background: var(--accent-muted);
    color: var(--accent-strong);
    font-weight: 800;
    font-size: 14px;
}

.text-answer {
    width: 100%;
    min-height: 80px;
    margin-top: 16px;
    padding: 12px;
    border-radius: var(--radius-md);
    border: 1px solid var(--line);
    resize: vertical;
    font: inherit;
    background: rgba(255, 255, 255, 0.95);
    transition: border-color 0.2s ease;
}

.text-answer:focus {
    outline: none;
    border-color: var(--teal);
    box-shadow: 0 0 0 3px var(--teal-muted);
}

.reference-link {
    color: var(--teal);
    text-decoration: none;
}

.reference-link:hover {
    text-decoration: underline;
}

button,
.tab-button,
.link-button,
.select-control {
    appearance: none;
    border: none;
    border-radius: 999px;
    padding: 8px 20px;
    font: inherit;
    font-weight: 600;
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: all 0.2s ease;
}

button:disabled {
    cursor: wait;
    opacity: 0.7;
}

.select-control {
    min-width: 190px;
    color: var(--ink);
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid rgba(16, 36, 50, 0.1);
}

button:hover,
.tab-button:hover,
.link-button:hover {
    transform: translateY(-2px);
    filter: brightness(0.98);
}

.primary {
    color: #ffffff;
    background: linear-gradient(135deg, var(--accent), var(--accent-strong));
    box-shadow: 0 4px 14px rgba(191, 91, 57, 0.3);
}

.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(191, 91, 57, 0.35);
}

.secondary {
    color: var(--ink);
    background: rgba(16, 36, 50, 0.06);
    border: 1px solid rgba(16, 36, 50, 0.1);
}

.ghost,
.tab-button {
    color: var(--teal);
    background: var(--teal-muted);
}

.tab-button.active {
    color: #ffffff;
    background: linear-gradient(135deg, var(--teal), #154d53);
    box-shadow: 0 4px 12px rgba(31, 107, 116, 0.25);
}

.result-banner,
.explanation-card,
.note-banner,
.empty-state,
.trace-card,
.stage-item {
    padding: 14px 16px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.96);
}

.result-banner strong,
.explanation-card strong,
.trace-card strong,
.stage-item strong,
.report-section h3,
.section-title,
.stage-summary-card strong {
    display: block;
    margin-bottom: 6px;
    font-size: 0.9rem;
}

.explanation-loading-row {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.spinner {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid rgba(31, 107, 116, 0.2);
    border-top-color: var(--teal);
    animation: spin 0.8s linear infinite;
    flex-shrink: 0;
}

.explanation-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 8px 0 12px;
}

.explanation-block {
    padding: 10px 0;
    border-top: 1px solid var(--line);
}

.explanation-block h4,
.weak-point-section h5 {
    margin: 0 0 6px;
    color: var(--ink);
    font-size: 0.86rem;
}

.explanation-block p,
.weak-point-section p {
    margin: 0;
    white-space: pre-line;
}

.option-analysis-list,
.trace-path-list,
.evidence-list,
.resource-list {
    display: grid;
    gap: 8px;
}

.option-analysis-item {
    display: grid;
    grid-template-columns: 28px 1fr;
    gap: 8px;
    align-items: start;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    background: rgba(16, 36, 50, 0.04);
}

.option-analysis-item.correct {
    background: rgba(47, 133, 101, 0.1);
}

.option-analysis-item.wrong {
    background: rgba(191, 91, 57, 0.08);
}

.option-analysis-item strong {
    margin: 0;
}

.option-analysis-item p {
    margin: 0;
}

.weak-point-card {
    display: grid;
    gap: 14px;
}

.weak-point-head {
    display: flex;
    align-items: start;
    justify-content: space-between;
    gap: 16px;
}

.weak-point-head h4 {
    margin: 0;
    font-size: 1.08rem;
}

.weak-point-rate {
    min-width: 70px;
    text-align: right;
}

.weak-point-rate strong {
    margin: 0;
    color: var(--accent-strong);
    font-size: 1.5rem;
}

.weak-point-rate small {
    display: block;
    color: var(--ink-soft);
}

.weak-point-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
    color: var(--ink-soft);
    font-size: 12px;
}

.weak-point-section {
    padding-top: 12px;
    border-top: 1px solid var(--line);
}

.trace-path-step {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 8px;
    align-items: center;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    background: rgba(31, 107, 116, 0.06);
    font-size: 12px;
}

.trace-path-step b {
    color: var(--teal);
    font-size: 11px;
}

.evidence-item,
.resource-item {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 9px 10px;
    border-radius: var(--radius-sm);
    background: rgba(16, 36, 50, 0.035);
}

.evidence-item strong,
.resource-item strong {
    margin: 0;
    font-size: 0.82rem;
}

.evidence-item small,
.resource-item small {
    display: block;
    margin-top: 4px;
    color: var(--ink-soft);
    line-height: 1.4;
}

.muted-text {
    color: var(--ink-soft);
    font-size: 0.82rem;
}

.result-banner.correct {
    background: linear-gradient(135deg, rgba(47, 133, 101, 0.08), rgba(47, 133, 101, 0.04));
    border-left: 4px solid var(--success);
}

.result-banner.wrong,
.note-banner.warning {
    background: linear-gradient(135deg, var(--accent-muted), rgba(191, 91, 57, 0.06));
    border-left: 4px solid var(--accent);
}

.note-banner.success {
    background: linear-gradient(135deg, rgba(47, 133, 101, 0.08), rgba(47, 133, 101, 0.04));
    border-left: 4px solid var(--success);
}

.note-banner.subtle {
    background: linear-gradient(135deg, rgba(31, 107, 116, 0.08), rgba(31, 107, 116, 0.03));
    border-left: 4px solid var(--teal);
    margin: 14px 0;
}

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

.metric-card {
    min-height: 100px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background: linear-gradient(135deg, rgba(255,255,255,0.98), rgba(251,247,239,0.96));
}

.metric-value {
    font-size: 32px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--teal), var(--accent));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.bar-track {
    width: 100%;
    height: 6px;
    border-radius: 999px;
    overflow: hidden;
    background: rgba(16, 36, 50, 0.08);
}

.bar-fill {
    height: 100%;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--teal), var(--gold), var(--accent));
}

.stage-list {
    margin-top: 8px;
    gap: 12px;
}

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

.record-card {
    padding: 14px 16px;
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid rgba(16, 36, 50, 0.08);
    box-shadow: var(--shadow-sm);
}

.record-card.correct {
    border-left: 4px solid var(--success);
}

.record-card.wrong {
    border-left: 4px solid var(--accent);
}

.record-card-head small,
.record-question {
    color: var(--ink-soft);
}

.record-question {
    margin: 10px 0;
    line-height: 1.5;
}

.record-badge,
.record-status {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
}

.record-badge.correct,
.record-status.ready {
    background: rgba(47, 133, 101, 0.12);
    color: var(--success);
}

.record-badge.wrong,
.record-status.failed,
.record-status.cancelled {
    background: rgba(191, 91, 57, 0.12);
    color: var(--accent-strong);
}

.record-status.pending {
    background: rgba(31, 107, 116, 0.1);
    color: var(--teal);
}

.record-action-button {
    padding-inline: 14px;
}

.stage-item {
    cursor: pointer;
    transition: all 0.2s ease;
    padding: 12px;
}

.stage-item:hover {
    transform: translateX(4px);
    border-color: var(--teal);
    box-shadow: var(--shadow-sm);
}

.stage-item.active {
    border-color: var(--teal);
    background: linear-gradient(135deg, rgba(31, 107, 116, 0.04), rgba(31, 107, 116, 0.02));
    box-shadow: var(--shadow-sm);
}

.stage-item-head {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    align-items: start;
    margin-bottom: 8px;
}

.stage-summary {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
    margin-top: 8px;
}

.report-meta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.report-layout {
    grid-template-columns: 1fr;
}

.report-layout > .side-card {
    order: -1;
}

.report-layout .stage-list {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.report-focus-mode .hero,
.report-focus-mode .top-nav,
.report-focus-mode .report-layout > .side-card {
    display: none;
}

.report-focus-mode .shell {
    max-width: 1680px;
    padding-top: 24px;
}

.report-section {
    gap: 10px;
}

.learning-guide-section {
    margin-top: 4px;
}

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

.path-list {
    display: grid;
    gap: 10px;
}

.recommendation-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 8px;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    color: var(--ink-soft);
    background: rgba(31, 107, 116, 0.06);
    border: 1px solid rgba(31, 107, 116, 0.12);
    font-size: 13px;
}

.recommendation-meta,
.recommendation-feedback-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
    margin-top: 8px;
}

.recommendation-feedback-actions button {
    min-height: 30px;
    padding: 5px 10px;
    font-size: 12px;
}

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

.course-plan-item {
    display: grid;
    gap: 10px;
    padding: 12px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid rgba(16, 36, 50, 0.06);
}

.path-step,
.video-item {
    display: grid;
    grid-template-columns: 32px 1fr;
    gap: 10px;
    align-items: start;
    padding: 10px;
    border-radius: var(--radius-md);
    background: rgba(31, 107, 116, 0.04);
    border: 1px solid rgba(16, 36, 50, 0.06);
}

.path-order {
    display: inline-grid;
    place-items: center;
    width: 28px;
    height: 28px;
    border-radius: 10px;
    color: #ffffff;
    background: var(--teal);
    font-size: 12px;
    font-weight: 800;
}

.path-step small,
.video-item small,
.course-plan-item small {
    display: block;
    color: var(--ink-soft);
    line-height: 1.4;
}

.report-section h3,
.section-title,
.page-title {
    margin: 0;
}

.section-title {
    font-size: 1.1rem;
    padding-bottom: 4px;
    border-bottom: 2px solid var(--gold-muted);
    display: inline-block;
}

.topline {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.fade-in {
    animation: fadeInUp 0.4s ease both;
}

/* 作答记录平铺展开样式 */
.record-list-expanded {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-height: 500px;
    overflow-y: auto;
    padding-right: 8px;
}

/* 自定义滚动条 */
.record-list-expanded::-webkit-scrollbar {
    width: 6px;
}

.record-list-expanded::-webkit-scrollbar-track {
    background: rgba(16, 36, 50, 0.05);
    border-radius: 3px;
}

.record-list-expanded::-webkit-scrollbar-thumb {
    background: rgba(31, 107, 116, 0.3);
    border-radius: 3px;
}

.record-list-expanded .record-card {
    padding: 16px;
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.96);
    border: 1px solid rgba(16, 36, 50, 0.08);
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

.record-list-expanded .record-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--teal);
}

.record-list-expanded .record-card-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    flex-wrap: wrap;
    gap: 8px;
}

.record-list-expanded .record-question {
    margin: 12px 0;
    padding: 8px 12px;
    background: rgba(31, 107, 116, 0.04);
    border-radius: var(--radius-sm);
    line-height: 1.5;
    font-size: 0.9rem;
}

.record-list-expanded .record-meta-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 12px 0;
}

.record-list-expanded .record-actions-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid rgba(16, 36, 50, 0.06);
}

.record-list-expanded .record-card.correct {
    border-left: 4px solid var(--success);
}

.record-list-expanded .record-card.wrong {
    border-left: 4px solid var(--accent);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@media (max-width: 1040px) {
    .hero,
    .page-layout,
    .report-layout {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .top-nav {
        flex-direction: row;
        flex-wrap: wrap;
    }

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

@media (max-width: 1100px) {
    .top-nav {
        gap: 12px;
        padding: 12px 16px;
    }
    
    .brand-lockup {
        gap: 8px;
    }
    
    .brand-lockup strong {
        font-size: 0.9rem;
    }
    
    .brand-lockup small {
        font-size: 0.7rem;
    }
    
    .nav-links {
        gap: 6px;
    }
    
    .nav-links a {
        padding: 6px 10px;
        font-size: 0.8rem;
    }
}

@media (max-width: 900px) {
    .brand-lockup strong {
        font-size: 0.85rem;
    }
    
    .nav-links a {
        padding: 5px 8px;
        font-size: 0.75rem;
    }
}

.hero {
    grid-template-columns: 1.5fr 0.5fr;
}

.page-layout {
    grid-template-columns: 1.8fr 0.5fr;
    align-items: start;
}

@media (max-width: 640px) {
    .shell {
        padding: 16px 12px 32px;
    }

    .hero-card,
    .panel,
    .side-card,
    .report-card {
        padding: 16px;
    }

    .question-card {
        padding: 16px;
    }

    .hero-metrics,
    .summary-grid,
    .quick-grid,
    .stage-summary {
        grid-template-columns: 1fr;
    }

    .actions,
    .hero-actions,
    .tab-row,
    .inline-actions,
    .stage-actions,
    .nav-links,
    .progress-card-head,
    .record-card-head,
    .record-actions-row,
    .record-meta-row {
        flex-direction: column;
    }

    button,
    .tab-button,
    .select-control {
        width: 100%;
        justify-content: center;
    }

    .option-card {
        grid-template-columns: auto 1fr;
    }
    
    .option-letter {
        grid-row: 1;
    }

    .learning-grid {
        grid-template-columns: 1fr;
    }
}