/* =========================================================
   CRONOS — Project Page Stylesheet
   Clean, modern academic design.
   ========================================================= */

:root {
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --bg-accent: #f0f4f9;
  --text: #1a1d23;
  --text-muted: #5a6072;
  --text-soft: #8a92a3;
  --border: #e4e7ec;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --accent: #7c3aed;
  --success: #059669;
  --code-bg: #0f172a;
  --code-text: #e2e8f0;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.08);
  --radius: 12px;
  --radius-sm: 8px;
  --max-width: 1100px;
  --max-width-narrow: 760px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 17px;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); text-decoration: underline; }

code {
  font-family: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.88em;
  background: var(--bg-soft);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  color: var(--accent);
}

/* ===== Container ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}
.container.narrow { max-width: var(--max-width-narrow); }

/* ===== Hero ===== */
.hero {
  padding: 80px 0 60px;
  background: linear-gradient(180deg, #fafbff 0%, #ffffff 100%);
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.venue-badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(37, 99, 235, 0.08);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 24px;
}
.paper-title {
  font-size: clamp(1.8rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 32px;
  letter-spacing: -0.02em;
  color: var(--text);
}

.authors {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  font-size: 1.05rem;
  color: var(--text);
  margin-bottom: 12px;
}
.author sup { color: var(--text-muted); font-weight: 500; }
.affiliations {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-bottom: 36px;
}

/* ===== Action Buttons ===== */
.action-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 48px;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--text);
  color: #fff;
  border-radius: 999px;
  font-weight: 500;
  font-size: 0.95rem;
  text-decoration: none;
  transition: transform 0.15s ease, background 0.15s ease;
  box-shadow: var(--shadow-sm);
}
.btn:hover {
  background: #2c3140;
  color: #fff;
  text-decoration: none;
  transform: translateY(-1px);
}
.btn-icon { font-size: 1.05em; }

/* ===== Teaser Media ===== */
.teaser-media {
  margin: 0 auto 24px;
  max-width: var(--max-width);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.teaser-media video,
.teaser-media img {
  width: 100%;
  display: block;
}
.teaser-caption {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
  color: var(--text-muted);
  font-size: 1rem;
}

/* ===== Media Placeholders ===== */
.media-placeholder {
  width: 100%;
  background:
    repeating-linear-gradient(
      45deg,
      #eef1f6 0,
      #eef1f6 12px,
      #f5f7fa 12px,
      #f5f7fa 24px
    );
  border: 2px dashed #c7cdd9;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  aspect-ratio: 16 / 9;
  text-align: center;
  transition: border-color 0.2s ease;
}
.media-placeholder:hover { border-color: var(--primary); }
.media-placeholder.small { aspect-ratio: 4 / 3; }
.media-placeholder.tiny { aspect-ratio: 4 / 3; margin-top: 12px; font-size: 0.85em; }
.media-placeholder.wide { aspect-ratio: 16 / 5; }

.placeholder-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 20px;
}
.placeholder-icon { font-size: 2rem; }
.placeholder-text { font-weight: 600; font-size: 1rem; color: var(--text); }
.placeholder-hint { font-size: 0.85rem; color: var(--text-soft); }

/* ===== Section ===== */
.section {
  padding: 72px 0;
  border-bottom: 1px solid var(--border);
}
.section--accent { background: var(--bg-soft); }
.section--findings { background: linear-gradient(180deg, #fafbff, #ffffff); }

.section h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 0 0 24px;
}
.section h3 {
  font-size: 1.35rem;
  font-weight: 600;
  margin: 48px 0 16px;
}
.section h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0 0 8px;
}
.section p { margin: 0 0 18px; color: var(--text); }
.lead { font-size: 1.1rem; color: var(--text-muted); margin-bottom: 32px; }

/* ===== Definition Card ===== */
.definition-card {
  background: #fff;
  padding: 32px 36px;
  border-left: 4px solid var(--primary);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}
.definition-label {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 8px;
}
.definition-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0 0 12px;
  color: var(--text);
}
.definition-body {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.65;
}

/* ===== Figure ===== */
.figure {
  margin: 40px 0;
}
.figure-image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  background: #fff;
}
/* Interactive sensitivity chart */
.sensitivity-figure {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 22px 18px;
  box-shadow: var(--shadow-md);
}
.chart-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}
.chart-toggle {
  display: inline-flex;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px;
  gap: 2px;
}
.chart-toggle-btn {
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  background: transparent;
  border: 0;
  padding: 7px 18px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}
.chart-toggle-btn:hover { color: var(--text); }
.chart-toggle-btn.is-active {
  background: var(--text);
  color: #fff;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.18);
}
.chart-meta-hint {
  font-size: 0.82rem;
  color: var(--text-soft);
  font-style: italic;
}
.chart-wrap {
  position: relative;
  width: 100%;
  height: 480px;            /* generous height per the request */
}
@media (max-width: 720px) {
  .chart-wrap { height: 360px; }
  .chart-controls { flex-direction: column; align-items: flex-start; }
  .chart-meta-hint { font-size: 0.78rem; }
}

.figure figcaption {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-top: 14px;
  text-align: center;
  line-height: 1.55;
}

/* ===== Event Grid ===== */
.event-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin: 24px 0 40px;
}
.event-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0 0 20px;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.event-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.event-media { padding: 0; }
.event-media .media-placeholder {
  border-radius: 0;
  border-left: 0;
  border-right: 0;
  border-top: 0;
}
.event-card h4 { padding: 16px 20px 0; }
.event-card p { padding: 0 20px; color: var(--text-muted); font-size: 0.95rem; margin: 0; }

/* ===== Intervention List ===== */
.intervention-list {
  list-style: none;
  padding: 0;
  margin: 24px 0 32px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.intervention-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  align-items: start;
  padding: 16px 20px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.intervention-item:hover {
  border-color: #c7d1e5;
  box-shadow: var(--shadow-sm);
}
.intervention-icon {
  font-size: 1.6rem;
  line-height: 1.2;
  text-align: center;
}
.intervention-body { min-width: 0; }
.intervention-head {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
  flex-wrap: wrap;
}
.intervention-name {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text);
}
.intervention-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.intervention-tag.tag-nuisance {
  background: rgba(124, 58, 237, 0.08);
  color: var(--accent);
  border-color: rgba(124, 58, 237, 0.22);
}
.intervention-tag.tag-structured {
  background: rgba(37, 99, 235, 0.08);
  color: var(--primary);
  border-color: rgba(37, 99, 235, 0.22);
}
.intervention-item p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.55;
}
.intervention-grid-caption {
  margin: 32px 0 16px;
  font-size: 0.98rem;
  color: var(--text-muted);
  font-style: italic;
}

/* ===== Metric list ===== */
.metric-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px 24px;
  margin: 16px 0;
}
.metric-item {
  padding: 14px 18px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--text-muted);
}
.metric-item strong { color: var(--text); }

/* ===== Findings Grid (2×2) ===== */
.findings-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  margin: 16px 0 48px;
}
@media (max-width: 720px) {
  .findings-grid { grid-template-columns: 1fr; }
}
.finding-card {
  background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
  border: 1px solid #fde68a;
  border-radius: var(--radius);
  padding: 26px 30px 28px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.10);
}
.finding-card::before {
  /* slim accent stripe along the top edge */
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #fbbf24 0%, #f59e0b 100%);
}
.finding-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
  border-color: #fde68a;
}
.finding-number {
  font-family: 'JetBrains Mono', 'Inter', sans-serif;
  font-size: 3.6rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  background: linear-gradient(180deg, #fbbf24 0%, #f59e0b 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 0;
  padding: 0;
  border: 0;
  display: inline-block;
  align-self: start;
}
.finding-card h3 {
  font-size: 1.25rem;
  margin: 0;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.005em;
  line-height: 1.3;
}
.finding-card p {
  color: var(--text-muted);
  font-size: 0.98rem;
  margin: 0;
  line-height: 1.65;
}
.finding-card p strong { color: var(--text); font-weight: 600; }

/* ===== Results Table ===== */
.table-wrap {
  overflow-x: auto;
  margin: 16px 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.results-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  font-size: 0.93rem;
}
.results-table th,
.results-table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.results-table th {
  background: var(--bg-soft);
  font-weight: 600;
  color: var(--text);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.results-table tbody tr:hover { background: #fafbfd; }
.results-table strong { color: var(--primary); }

/* Side-by-side: table on the left, radar (wider) on the right */
.results-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.55fr);
  gap: 24px;
  align-items: start;
  margin: 16px 0;
}
.results-layout .table-wrap { margin: 0; }

/* Compact variant: tighter padding so the 4-column table sits nicely beside the radar */
.results-table--compact th,
.results-table--compact td {
  padding: 10px 12px;
}

/* Clickable row affordance + colored swatch */
.results-row { cursor: pointer; transition: background 0.15s ease, opacity 0.15s ease; }
.results-row.is-hidden { opacity: 0.42; }
.results-row.is-hidden td { color: #9aa1ad; }
.results-row.is-hidden .row-swatch { background: #cfd4dd !important; }
.results-row.is-hidden strong { color: #9aa1ad; }
.row-swatch {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  margin-right: 8px;
  vertical-align: middle;
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.12) inset;
}

/* Radar pane */
.radar-figure {
  margin: 0;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 16px 18px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.radar-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  min-height: 560px;
}
.radar-figure figcaption {
  font-size: 0.85rem;
  color: #5a6072;
  text-align: center;
}

@media (max-width: 900px) {
  .results-layout { grid-template-columns: 1fr; }
}

/* ===== Selector (button group) ===== */
.selector {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 28px 0 20px;
  padding: 10px 14px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  width: fit-content;
  max-width: 100%;
}

/* Model selector — stacked rows grouped by mode (V2V, I2V), centered on page.
   align-items: stretch makes the shorter row fill the wider row's width so the pill
   sizes to the widest row's content (more reliable in Safari than max-content tricks). */
.selector[data-selector="model"] {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  flex-wrap: nowrap;            /* override the global .selector flex-wrap */
  gap: 10px;
  width: fit-content;
  max-width: 100%;
  margin: 28px auto 20px;
  padding: 16px 22px;
  border-radius: 18px;
}
.selector[data-selector="model"] .selector-label {
  text-align: center;
  margin: 0 0 4px 0;
}
.selector-row {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: max-content;       /* force the row to extend to its full content */
}
.mode-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-muted);
  margin-right: 4px;
}
.mode-tag.tag-v2v {
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  border-color: rgba(37, 99, 235, 0.25);
}
.mode-tag.tag-i2v {
  background: rgba(124, 58, 237, 0.1);
  color: var(--accent);
  border-color: rgba(124, 58, 237, 0.25);
}
.selector[data-selector="model"] .selector-btn {
  text-align: center;
  white-space: nowrap;
  flex: 0 0 auto;             /* don't let buttons shrink or grow */
}
.selector-label {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-right: 4px;
}
.selector-btn {
  font-family: inherit;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid transparent;
  padding: 7px 16px;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}
.selector-btn:hover {
  color: var(--text);
  background: rgba(0,0,0,0.04);
}
.selector-btn.is-active {
  background: var(--text);
  color: #fff;
  border-color: var(--text);
}

/* ===== Video Slot (video + placeholder overlay) ===== */
.video-slot {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  overflow: hidden;
  background: #000;
}
.video-slot.wide { aspect-ratio: 16 / 5; }
.video-slot video {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}
.video-slot .media-placeholder {
  position: absolute;
  inset: 0;
  margin: 0;
  border-radius: var(--radius);
  aspect-ratio: auto;
}

/* ===== Qualitative Grid (3×3 model comparison) ===== */
.qualitative-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin: 24px 0 40px;
}
.qualitative-cell {
  display: flex;
  flex-direction: column;
  text-align: center;
}
.qualitative-cell .video-slot {
  aspect-ratio: 16 / 9;
  width: 100%;
}
.qualitative-cell .cell-label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 10px;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
  min-height: 22px;
}
.cell-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 2px 7px;
  border-radius: 4px;
  background: var(--bg-soft);
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.cell-tag.tag-gt {
  background: rgba(5, 150, 105, 0.1);
  color: var(--success);
  border-color: rgba(5, 150, 105, 0.25);
}
.cell-tag.tag-v2v {
  background: rgba(37, 99, 235, 0.1);
  color: var(--primary);
  border-color: rgba(37, 99, 235, 0.25);
}
.cell-tag.tag-i2v {
  background: rgba(124, 58, 237, 0.1);
  color: var(--accent);
  border-color: rgba(124, 58, 237, 0.25);
}

/* Two columns on tablets, one column on phones */
@media (max-width: 960px) {
  .qualitative-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .qualitative-grid { grid-template-columns: 1fr; }
}

/* ===== Counterfactual Grid (Original | 2×2 variants) ===== */
.counterfactual-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin: 24px 0;
  align-items: stretch;
}
.counterfactual-original {
  display: flex;
  flex-direction: column;
  text-align: center;
}
.counterfactual-original .cell-label {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.counterfactual-original .video-slot {
  flex: 1;
  aspect-ratio: auto;
  min-height: 280px;
}
.counterfactual-variants {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 16px;
}
.counterfactual-cell {
  text-align: center;
  display: flex;
  flex-direction: column;
}
.counterfactual-variants .video-slot {
  flex: 1;
  aspect-ratio: auto;
  min-height: 0;
}
.cell-label {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text);
  margin-bottom: 8px;
}

/* Stack the two columns on narrow screens */
@media (max-width: 720px) {
  .counterfactual-grid {
    grid-template-columns: 1fr;
  }
  .counterfactual-original .video-slot { min-height: 220px; }
  .counterfactual-variants .video-slot { aspect-ratio: 4 / 3; min-height: 0; }
}

/* ===== Limitations ===== */
.limitations-list {
  padding-left: 0;
  list-style: none;
}
.limitations-list li {
  padding: 14px 0 14px 28px;
  border-bottom: 1px solid var(--border);
  position: relative;
  color: var(--text-muted);
}
.limitations-list li::before {
  content: "›";
  position: absolute;
  left: 4px;
  top: 12px;
  font-size: 1.4rem;
  color: var(--primary);
  font-weight: 700;
  line-height: 1;
}
.limitations-list li:last-child { border-bottom: none; }
.limitations-list strong { color: var(--text); }

/* ===== Acknowledgments ===== */
.ack-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 48px;
  margin: 32px 0 8px;
}
.ack-logo {
  max-width: 30%;
  height: auto;
  max-height: 90px;
  object-fit: contain;
}
@media (max-width: 560px) {
  .ack-logos { gap: 28px; }
  .ack-logo { max-width: 45%; }
}

/* ===== BibTeX ===== */
.bibtex {
  background: var(--code-bg);
  color: var(--code-text);
  padding: 22px 26px;
  border-radius: var(--radius);
  overflow-x: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.88rem;
  line-height: 1.6;
}
.bibtex code {
  background: transparent;
  color: inherit;
  padding: 0;
}

/* ===== Footer ===== */
.footer {
  padding: 36px 0;
  background: var(--bg-soft);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.92rem;
}

/* ===== Responsive ===== */
@media (max-width: 720px) {
  .hero { padding: 60px 0 40px; }
  .section { padding: 56px 0; }
  .authors { gap: 12px; }
  .comparison-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .comparison-label { text-align: left; padding: 0; }
  .action-buttons .btn {
    padding: 9px 16px;
    font-size: 0.9rem;
  }
}