:root {
  --bg: #f5efe2;
  --bg-alt: #fdf8ef;
  --ink: #10213b;
  --muted: #5b6b83;
  --line: rgba(16, 33, 59, 0.14);
  --panel: rgba(255, 250, 242, 0.92);
  --panel-solid: #fffaf2;
  --primary: #0f8ecf;
  --primary-soft: rgba(15, 142, 207, 0.14);
  --accent: #f59e0b;
  --accent-soft: rgba(245, 158, 11, 0.16);
  --success: #0f9f7f;
  --success-soft: rgba(15, 159, 127, 0.14);
  --danger: #cc4b37;
  --danger-soft: rgba(204, 75, 55, 0.14);
  --shadow: 0 22px 60px rgba(45, 59, 86, 0.14);
  --shadow-soft: 0 10px 24px rgba(45, 59, 86, 0.08);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --surface: rgba(16, 33, 59, 0.04);
  --surface-hover: rgba(16, 33, 59, 0.08);
  --surface: rgba(16, 33, 59, 0.04);
  --surface-hover: rgba(16, 33, 59, 0.08);
  --transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

[data-theme="dark"] {
  --bg: #0d1117;
  --bg-alt: #161b22;
  --ink: #e6edf3;
  --muted: #8b949e;
  --line: rgba(255, 255, 255, 0.08);
  --panel: rgba(22, 27, 34, 0.85);
  --panel-solid: #161b22;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-hover: rgba(255, 255, 255, 0.08);
  --surface: rgba(255, 255, 255, 0.04);
  --surface-hover: rgba(255, 255, 255, 0.08);
  --primary: #2f81f7;
  --primary-soft: rgba(47, 129, 247, 0.15);
  --accent: #d29922;
  --accent-soft: rgba(210, 153, 34, 0.15);
  --success: #238636;
  --success-soft: rgba(35, 134, 54, 0.15);
  --danger: #f85149;
  --danger-soft: rgba(248, 81, 73, 0.15);
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.5);
  --shadow-soft: 0 10px 24px rgba(0, 0, 0, 0.3);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  background-image:
    radial-gradient(circle at top left, var(--primary-soft), transparent 26%),
    radial-gradient(circle at bottom right, var(--accent-soft), transparent 24%),
    linear-gradient(180deg, var(--bg-alt) 0%, var(--bg) 100%);
  color: var(--ink);
  font-family: inherit;
  transition: var(--transition);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.4), transparent 80%);
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  color: inherit;
  cursor: pointer;
  transition: transform 0.2s ease, var(--transition);
}

a {
  color: inherit;
}

h1,
h2,
h3,
h4,
strong,
.stat-label,
.eyebrow,
.badge,
.status-pill,
.nav-button,
.metric-value,
.score-value {
  font-family: "Sora", "Segoe UI", sans-serif;
}

.page-shell {
  position: relative;
  max-width: 1440px;
  margin: 0 auto;
  padding: 100px clamp(16px, 3vw, 40px) 64px;
}

.top-nav {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 32px);
  max-width: 1200px;
  background: var(--panel);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--line);
  border-radius: 999px;
  z-index: 100;
  padding: 8px 16px;
  box-shadow: var(--shadow-soft);
  transition: var(--transition);
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px;
  border-radius: 999px;
  font-family: "Sora", sans-serif;
  font-size: 1.15rem;
  color: var(--ink);
  text-decoration: none;
  transition: all 0.2s ease;
}

.nav-brand:hover {
  background: var(--primary-soft);
}

.nav-brand svg {
  color: var(--primary);
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  gap: 6px;
  align-items: center;
}

.nav-links .text-button {
  padding: 8px 16px;
  border-radius: 999px;
  font-weight: 500;
  text-decoration: none;
  color: var(--muted);
  transition: all 0.2s ease;
}

.nav-links .text-button:hover {
  background: var(--line);
  color: var(--ink);
}

.nav-links .text-button.active {
  background: var(--primary);
  color: #ffffff;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(15, 142, 207, 0.25);
}

.theme-toggle-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid transparent;
  color: var(--ink);
  transition: all 0.2s ease;
  margin-left: 8px;
}

.theme-toggle-btn:hover {
  background: var(--line);
}

.markdown-body {
  font-size: 1.1rem;
  line-height: 1.7;
}

.markdown-body h1, .markdown-body h2, .markdown-body h3 {
  color: var(--ink);
  margin-top: 1.5em;
  margin-bottom: 0.5em;
}

.markdown-body h1 { font-size: 2.2rem; }
.markdown-body h2 { font-size: 1.8rem; border-bottom: 1px solid var(--line); padding-bottom: 8px; }
.markdown-body h3 { font-size: 1.4rem; }
.markdown-body pre { background: var(--bg-alt); padding: 16px; border-radius: 8px; overflow-x: auto; border: 1px solid var(--line); }
.markdown-body code { font-family: monospace; background: var(--bg-alt); padding: 2px 6px; border-radius: 4px; font-size: 0.9em; }
.markdown-body ul, .markdown-body ol { margin: 1em 0; padding-left: 2em; }
.markdown-body li { margin-bottom: 8px; }
.markdown-body p { margin-bottom: 1em; color: var(--muted); }
.markdown-body table { width: 100%; border-collapse: collapse; margin-bottom: 1em; }
.markdown-body th, .markdown-body td { border: 1px solid var(--line); padding: 12px; text-align: left; }
.markdown-body blockquote { border-left: 4px solid var(--primary); margin: 1em 0; padding-left: 16px; color: var(--muted); background: var(--primary-soft); padding: 16px; border-radius: 0 8px 8px 0;}

.doc-link {
  display: block;
  padding: 8px 12px;
  color: var(--muted);
  text-decoration: none;
  border-radius: 6px;
  transition: var(--transition);
}

.doc-link:hover {
  background: var(--primary-soft);
  color: var(--primary);
}

.doc-link.active {
  background: var(--primary);
  color: white;
  font-weight: 600;
}

/* ── Home page ─────────────────────────────────────────── */

#homeView {
  min-height: calc(100vh - 120px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.home-hero {
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 36px;
  padding: 20px 0;
}

.home-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.home-badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.88rem;
  background: rgba(16, 33, 59, 0.05);
  border: 1px solid var(--line);
  color: var(--muted);
  box-shadow: var(--shadow-soft);
}

.home-badge-blue {
  background: var(--primary-soft);
  border-color: rgba(15, 142, 207, 0.3);
  color: var(--primary);
}

.home-badge-green {
  background: var(--success-soft);
  border-color: rgba(15, 159, 127, 0.3);
  color: var(--success);
}

.home-logo-row {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.az900-logo {
  flex-shrink: 0;
  filter: drop-shadow(0 12px 32px rgba(0, 120, 212, 0.35));
  transition: transform 0.3s ease;
}
.az900-logo:hover {
  transform: scale(1.05);
}

.home-title {
  font-size: clamp(2.8rem, 6vw, 4.8rem);
  line-height: 1.05;
  margin: 0;
  background: linear-gradient(135deg, var(--ink) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.home-desc {
  font-size: 1.15rem;
  line-height: 1.8;
  max-width: 65ch;
  color: var(--muted);
  margin: 0;
}

.home-cta {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 8px;
}

.home-domains {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  width: 100%;
  margin-top: 18px;
  text-align: left;
}

@media (max-width: 800px) {
  .home-domains {
    grid-template-columns: 1fr;
  }
}

.home-domain-card {
  background: var(--panel-solid);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  box-shadow: var(--shadow-soft);
  display: grid;
  gap: 8px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.home-domain-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.home-domain-pct {
  font-family: "Sora", sans-serif;
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
}

.home-domain-card strong {
  font-size: 1.05rem;
  color: var(--ink);
  margin-top: 4px;
}

.home-domain-card p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.5;
}

.ambient {
  position: fixed;
  border-radius: 999px;
  filter: blur(80px);
  opacity: 0.38;
  pointer-events: none;
}

.ambient-one {
  top: 12%;
  right: -80px;
  width: 220px;
  height: 220px;
  background: rgba(15, 142, 207, 0.3);
}

.ambient-two {
  bottom: 8%;
  left: -40px;
  width: 260px;
  height: 260px;
  background: rgba(245, 158, 11, 0.24);
}

.panel-card {
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(280px, 0.9fr);
  gap: 24px;
  align-items: stretch;
  margin-bottom: 28px;
}

.hero-copy {
  border-radius: var(--radius-xl);
  padding: clamp(24px, 4vw, 40px);
}

.eyebrow {
  margin: 0 0 14px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
  color: var(--primary);
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 4.4rem);
  line-height: 0.95;
}

.hero-text {
  max-width: 52ch;
  margin: 18px 0 0;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--muted);
}

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

.hero-stat {
  border-radius: var(--radius-lg);
  padding: 18px 20px;
}

.stat-label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.85rem;
  color: var(--muted);
}

.hero-stat strong {
  font-size: 1.4rem;
}

.app-shell {
  display: grid;
  gap: 24px;
}

.dashboard,
.results-shell,
.workspace {
  display: grid;
  gap: 24px;
}

.dashboard-intro,
.summary-card,
.domain-card,
.paper-card,
.sidebar-card,
.question-panel,
.result-card,
.review-card,
.empty-state {
  background: var(--panel-solid);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}

.dashboard-intro,
.summary-card,
.domain-card,
.paper-card,
.sidebar-card,
.question-panel,
.result-card,
.empty-state {
  border-radius: var(--radius-lg);
}

.dashboard-intro {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  padding: 24px 28px;
}

.dashboard-intro h2,
.result-card h2,
.sidebar-card h2,
.question-panel h2 {
  margin: 0;
}

.dashboard-intro p {
  margin: 8px 0 0;
  max-width: 56ch;
  color: var(--muted);
  line-height: 1.65;
}

.summary-grid,
.domain-grid,
.paper-grid,
.metric-grid,
.breakdown-grid,
.answer-grid {
  display: grid;
  gap: 18px;
}

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

.summary-card,
.domain-card {
  padding: 20px 22px;
}

.summary-label,
.domain-meta,
.mini-label,
.review-label,
.answer-label,
.helper-text,
.filter-label,
.legend-label,
.explanation-text,
.progress-meta,
.card-meta,
.metric-label,
.breakdown-meta,
.result-note,
.empty-state p {
  color: var(--muted);
}

.summary-value,
.metric-value,
.score-value {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  line-height: 1;
  margin: 12px 0 8px;
}

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

.domain-card {
  position: relative;
  overflow: hidden;
}

.domain-card::after {
  content: "";
  position: absolute;
  inset: auto -20px -30px auto;
  width: 120px;
  height: 120px;
  border-radius: 999px;
  background: var(--domain-soft, rgba(15, 142, 207, 0.12));
}

.domain-card h3,
.paper-card h3,
.review-card h3,
.sidebar-card h3,
.result-card h3 {
  margin: 0;
}

.domain-card h3 {
  max-width: 16ch;
  margin-top: 8px;
}

.domain-meta {
  margin-top: 14px;
}

.paper-grid {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.paper-card {
  padding: 22px;
  display: grid;
  gap: 18px;
}

.card-top,
.metric-row,
.breakdown-row,
.review-top,
.review-meta,
.paper-actions,
.question-actions,
.results-actions,
.dashboard-actions,
.legend,
.filter-row,
.sidebar-actions,
.question-top {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.status-pill,
.badge,
.filter-button,
.nav-button,
.ghost-button,
.primary-button,
.secondary-button,
.text-button,
.option-index {
  border-radius: 999px;
}

.status-pill,
.badge,
.filter-button,
.nav-button,
.option-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.status-pill {
  padding: 8px 12px;
  font-size: 0.8rem;
  border: 1px solid transparent;
}

.status-pill.neutral {
  background: rgba(16, 33, 59, 0.08);
}

.status-pill.info {
  background: var(--primary-soft);
  color: var(--primary);
}

.status-pill.success {
  background: var(--success-soft);
  color: var(--success);
}

.status-pill.warning {
  background: var(--accent-soft);
  color: var(--accent);
}

.status-pill.danger {
  background: var(--danger-soft);
  color: var(--danger);
}

.card-meta,
.progress-meta,
.helper-text,
.breakdown-meta,
.result-note,
.review-label,
.answer-label,
.metric-label,
.filter-label,
.legend-label {
  font-size: 0.92rem;
}

.progress-track,
.mini-track {
  width: 100%;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(16, 33, 59, 0.08);
}

.progress-track {
  height: 12px;
}

.mini-track {
  height: 8px;
}

.progress-fill,
.mini-fill {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), #29b4f0);
}

.mini-fill {
  background: linear-gradient(90deg, var(--domain-color, var(--primary)), rgba(255, 255, 255, 0.9));
}

.domain-mini-grid {
  display: grid;
  gap: 10px;
}

.domain-mini {
  display: grid;
  gap: 6px;
}

.domain-mini-top {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.9rem;
}

.primary-button,
.secondary-button,
.ghost-button,
.text-button,
.filter-button {
  border: 1px solid transparent;
  padding: 12px 18px;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.primary-button,
.secondary-button,
.ghost-button,
.text-button {
  font-weight: 600;
}

.primary-button:hover,
.secondary-button:hover,
.ghost-button:hover,
.text-button:hover,
.filter-button:hover,
.option-button:hover,
.nav-button:hover {
  transform: translateY(-1px);
}

.primary-button:disabled,
.secondary-button:disabled,
.ghost-button:disabled,
.nav-button:disabled,
.option-button:disabled {
  cursor: not-allowed;
  opacity: 0.58;
  transform: none;
  box-shadow: none;
}

.primary-button {
  color: white;
  background: linear-gradient(135deg, #0f8ecf, #0fb3a2);
  box-shadow: 0 14px 28px rgba(15, 142, 207, 0.24);
}

.secondary-button {
  color: var(--ink);
  background: linear-gradient(135deg, #f8d473, #f59e0b);
  box-shadow: 0 14px 28px rgba(245, 158, 11, 0.24);
}

.reveal-button {
  color: white;
  background: linear-gradient(135deg, #6d28d9, #a855f7);
  box-shadow: 0 14px 28px rgba(109, 40, 217, 0.28);
}

.ghost-button,
.filter-button {
  color: var(--ink);
  background: rgba(16, 33, 59, 0.04);
  border-color: var(--line);
}

.text-button {
  color: var(--primary);
  background: transparent;
  padding-inline: 0;
}

.filter-button.is-active {
  background: var(--primary-soft);
  border-color: rgba(15, 142, 207, 0.24);
  color: var(--primary);
}

.workspace {
  grid-template-columns: minmax(300px, 360px) minmax(0, 1fr);
  align-items: start;
}

.workspace-sidebar {
  display: grid;
  gap: 18px;
}

.sidebar-card,
.question-panel,
.result-card {
  padding: 24px;
}

.metric-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 18px;
}

.metric-tile {
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(16, 33, 59, 0.04);
}

.metric-value {
  font-size: 1.6rem;
  margin: 10px 0 4px;
}

.legend {
  margin-top: 14px;
  gap: 8px;
}

.badge,
.legend-swatch {
  padding: 8px 12px;
  background: rgba(16, 33, 59, 0.06);
  border: 1px solid transparent;
  font-size: 0.82rem;
}

.badge {
  color: var(--ink);
}

.badge.flagged {
  background: var(--accent-soft);
  color: var(--accent);
}

.badge.success {
  background: var(--success-soft);
  color: var(--success);
}

.badge.danger {
  background: var(--danger-soft);
  color: var(--danger);
}

.nav-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin-top: 18px;
}

.nav-button {
  appearance: none;
  min-height: 44px;
  border: 1px solid var(--line);
  background: var(--panel-solid);
  color: var(--ink);
  font-weight: 700;
  box-shadow: var(--shadow-soft);
}

.nav-button.is-answered {
  background: var(--primary-soft);
  border-color: var(--primary);
}

.nav-button.is-flagged {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.nav-button.is-current {
  background: var(--ink);
  color: var(--bg);
}

[data-theme="dark"] .nav-button {
  background: rgba(230, 237, 243, 0.06);
  border-color: rgba(230, 237, 243, 0.14);
  box-shadow: none;
}

[data-theme="dark"] .nav-button.is-answered {
  background: rgba(35, 134, 54, 0.2);
  border-color: rgba(35, 134, 54, 0.38);
}

[data-theme="dark"] .nav-button.is-flagged {
  background: rgba(210, 153, 34, 0.16);
  border-color: rgba(210, 153, 34, 0.34);
  box-shadow: inset 0 0 0 1px rgba(210, 153, 34, 0.45);
}

[data-theme="dark"] .nav-button.is-answered.is-flagged {
  background: linear-gradient(135deg, rgba(35, 134, 54, 0.18), rgba(210, 153, 34, 0.16));
}

[data-theme="dark"] .nav-button.is-current {
  background: var(--primary);
  color: white;
  border-color: rgba(47, 129, 247, 0.52);
  box-shadow: 0 10px 24px rgba(47, 129, 247, 0.28);
}

.question-panel {
  display: grid;
  gap: 22px;
}

.question-top {
  align-items: flex-start;
}

.question-text {
  font-size: clamp(1.45rem, 2.2vw, 2rem);
  line-height: 1.35;
}

.option-list {
  display: grid;
  gap: 14px;
}

.option-button {
  width: 100%;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 18px 20px;
  appearance: none;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--panel-solid);
  color: var(--ink);
  box-shadow: var(--shadow-soft);
  text-align: left;
  transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.option-button.is-selected {
  border-color: var(--primary);
  background: linear-gradient(135deg, var(--primary-soft), var(--success-soft));
  box-shadow: 0 12px 24px var(--primary-soft);
  color: var(--ink);
}

.option-index {
  width: 44px;
  height: 44px;
  font-weight: 700;
  background: var(--surface-hover);
  color: var(--ink);
}

.option-button.is-selected .option-index {
  background: var(--primary);
  color: white;
}

.option-copy {
  color: inherit;
  line-height: 1.6;
}

.results-shell {
  grid-template-columns: minmax(0, 1fr);
}

.results-actions {
  justify-content: flex-start;
}

.result-overview {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 18px;
}

.score-value {
  margin: 12px 0;
  font-size: clamp(2.2rem, 5vw, 3.5rem);
}

.breakdown-grid {
  margin-top: 16px;
}

.breakdown-row {
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: rgba(16, 33, 59, 0.04);
  align-items: flex-start;
}

.breakdown-row strong {
  display: block;
}

.breakdown-stats {
  min-width: min(240px, 100%);
  display: grid;
  gap: 8px;
}

.filter-row {
  justify-content: flex-start;
}

.review-list {
  display: grid;
  gap: 18px;
}

.review-card {
  padding: 24px;
  border-radius: var(--radius-lg);
  border-left: 6px solid transparent;
}

.review-card.is-correct {
  border-left-color: var(--success);
}

.review-card.is-incorrect {
  border-left-color: var(--danger);
}

.review-card.is-revealed {
  border-left-color: var(--accent);
}

.review-card h3 {
  line-height: 1.45;
}

.review-meta {
  margin-top: 14px;
}

.answer-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 16px;
}

.answer-box {
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(16, 33, 59, 0.04);
}

.answer-box strong {
  display: block;
  margin-top: 6px;
  line-height: 1.55;
}

[data-theme="dark"] .option-button {
  background: rgba(230, 237, 243, 0.05);
  border-color: rgba(230, 237, 243, 0.12);
}

[data-theme="dark"] .option-button.is-selected {
  background: linear-gradient(135deg, rgba(47, 129, 247, 0.24), rgba(35, 134, 54, 0.18));
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.28);
}

[data-theme="dark"] .option-index {
  background: rgba(230, 237, 243, 0.1);
}

[data-theme="dark"] .answer-box {
  background: rgba(230, 237, 243, 0.05);
}

.explanation-text {
  margin: 18px 0 0;
  line-height: 1.7;
}

.empty-state {
  padding: 28px;
}

.empty-state h3 {
  margin: 0 0 10px;
}

.muted {
  color: var(--muted);
}

@media (max-width: 1120px) {
  .hero,
  .workspace,
  .result-overview {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 760px) {
  .page-shell {
    padding: 18px 12px 42px;
  }

  .dashboard-intro,
  .sidebar-card,
  .question-panel,
  .result-card,
  .paper-card,
  .review-card {
    padding: 20px;
  }

  .summary-grid,
  .domain-grid,
  .metric-grid,
  .answer-grid {
    grid-template-columns: 1fr;
  }

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

  .option-button {
    grid-template-columns: 40px minmax(0, 1fr);
    padding: 16px;
  }
}