:root {
  color-scheme: light;
  --background: #f7f4ee;
  --surface: #ffffff;
  --surface-muted: #f1ede5;
  --text: #1f2933;
  --muted: #5d6673;
  --border: #ded6ca;
  --accent: #315f8c;
  --accent-strong: #244766;
  --accent-soft: #e7f0f7;
  --shadow: 0 20px 45px rgba(31, 41, 51, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--accent-strong);
  text-decoration: underline;
}

.container {
  width: min(1160px, calc(100% - 48px));
  margin: 0 auto;
}

.site-hero {
  background:
    radial-gradient(circle at top left, rgba(49, 95, 140, 0.16), transparent 34rem),
    linear-gradient(180deg, #fffaf2 0%, var(--background) 100%);
  padding: 24px 0 72px;
}

.top-nav {
  display: flex;
  justify-content: center;
  gap: 22px;
  margin-bottom: 64px;
  font-size: 0.95rem;
}

.top-nav a {
  color: var(--muted);
}

.hero-content {
  text-align: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 960px;
  margin: 0 auto 18px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.25rem, 5.6vw, 4.75rem);
  line-height: 1.04;
  letter-spacing: -0.045em;
}

h1 span {
  display: block;
}

.title-prefix {
  color: var(--accent);
  font-size: 0.82em;
  letter-spacing: -0.025em;
}

.title-main {
  max-width: 820px;
  margin: 10px auto 0;
  font-size: 0.58em;
  line-height: 1.18;
  letter-spacing: -0.028em;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.08rem;
}

.subtitle {
  max-width: 760px;
  margin: 0 auto 26px;
  color: var(--muted);
  font-size: clamp(1.1rem, 2.3vw, 1.45rem);
}

.authors {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 18px;
  max-width: 920px;
  margin: 0 auto 12px;
  font-weight: 650;
}

.authors sup {
  font-size: 0.68em;
  font-weight: 700;
  letter-spacing: 0;
}

.affiliation {
  max-width: 760px;
  margin: 0 auto 28px;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.affiliation sup {
  margin-right: 2px;
  font-size: 0.75em;
  font-weight: 700;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.74);
  color: var(--text);
  font-weight: 700;
  box-shadow: 0 8px 20px rgba(31, 41, 51, 0.06);
}

.button:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
  text-decoration: none;
}

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #ffffff;
}

.button.primary:hover {
  background: var(--accent-strong);
  color: #ffffff;
}

.section,
.teaser-section {
  margin: 64px auto;
  padding: 42px;
  border: 1px solid var(--border);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.teaser-section {
  padding: 36px 42px 40px;
  text-align: center;
}

.teaser-section p,
.section > p {
  color: var(--muted);
  font-size: 1.05rem;
}

.teaser-section h2 {
  margin-bottom: 10px;
}

.teaser-section > p {
  max-width: 820px;
  margin: 0 auto 26px;
}

.figure-placeholder {
  display: grid;
  min-height: 260px;
  place-items: center;
  border: 1px dashed #aeb8c2;
  border-radius: 22px;
  background:
    linear-gradient(135deg, rgba(49, 95, 140, 0.12), transparent),
    var(--surface-muted);
  color: var(--muted);
  font-weight: 800;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.figure-placeholder.large {
  min-height: clamp(280px, 44vw, 480px);
  margin-bottom: 30px;
}

.teaser-figure {
  margin: 0;
}

.teaser-image {
  display: block;
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: #ffffff;
}

.teaser-figure figcaption {
  max-width: 860px;
  margin: 14px auto 0;
  color: var(--muted);
  line-height: 1.45;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface-muted);
}

.card p {
  margin-bottom: 0;
  color: var(--muted);
}

.subsection-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 24px;
}

.subsection-card {
  padding: 22px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface-muted);
}

.subsection-card p {
  color: var(--muted);
}

.section-figure {
  margin-top: 24px;
}

.section-image {
  display: block;
  width: 100%;
  margin-top: 24px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
}

.compact-figure {
  min-height: 220px;
  margin-top: 18px;
}

.ablation-video-card {
  margin-top: 18px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
}

.ablation-video-card video {
  display: block;
  width: 100%;
  border-radius: 12px;
  background: #000000;
}

.prompt-label {
  margin-bottom: 12px;
  padding: 10px 12px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 800;
}

.uncertainty-chart {
  overflow-x: auto;
  margin-top: 18px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface);
}

.ablation-video-card .uncertainty-chart {
  border-radius: 12px;
  background: var(--surface-muted);
}

.chart-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 2px;
}

.chart-header h3 {
  margin-bottom: 2px;
  font-size: 1rem;
}

.chart-header p,
.uncertainty-chart > p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.chart-header span {
  flex: 0 0 auto;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.9rem;
  font-weight: 800;
}

.uncertainty-chart svg {
  display: block;
  min-width: 720px;
  width: 100%;
}

.uncertainty-chart .axis {
  stroke: var(--border);
  stroke-width: 2;
}

.uncertainty-chart rect {
  fill: rgba(49, 95, 140, 0.22);
  opacity: 0.18;
  transition: opacity 180ms ease, stroke-width 180ms ease;
}

.uncertainty-chart rect.is-above {
  fill: rgba(183, 121, 31, 0.38);
}

.uncertainty-chart rect.is-visible {
  opacity: 1;
}

.uncertainty-chart rect.is-current {
  stroke: var(--accent-strong);
  stroke-width: 2;
}

.uncertainty-chart circle,
.uncertainty-line {
  fill: none;
  stroke: var(--accent);
  stroke-width: 3;
}

.uncertainty-chart circle {
  fill: var(--surface);
}

.threshold-line {
  stroke: #b7791f;
  stroke-dasharray: 8 8;
  stroke-width: 3;
}

.threshold-label,
.axis-label {
  fill: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.y-label {
  transform: rotate(-90deg);
  transform-origin: 18px center;
}

.comparison-video-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

figure {
  margin: 0;
}

figcaption {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.95rem;
}

.split-caption {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  text-align: center;
  font-weight: 700;
}

.rollout-groups {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  margin-top: 22px;
}

.rollout-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-top: 22px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface-muted);
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 700;
}

.rollout-legend span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.legend-swatch {
  display: inline-block;
  width: 14px;
  height: 14px;
  border-radius: 999px;
}

.legend-swatch.real-world {
  background: #2f855a;
}

.legend-swatch.offline-model {
  background: #b7791f;
}

.legend-swatch.online-model {
  background: #2b6cb0;
}

.rollout-group h3 {
  margin-bottom: 12px;
}

.rollout-group {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--surface-muted);
}

.video-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 0;
}

.video-card {
  line-height: 1.4;
}

.video-card video {
  display: block;
  width: 100%;
  margin-top: 12px;
  border: 4px solid var(--border);
  border-radius: 14px;
  background: #000000;
}

.combined-video-card .split-caption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.9rem;
}

.outcome-table {
  width: 100%;
  margin: 0 0 10px;
  border-collapse: collapse;
  table-layout: fixed;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-size: 0.8rem;
}

.outcome-table th,
.outcome-table td {
  padding: 6px 8px;
  border-bottom: 1px solid var(--border);
  text-align: center;
}

.outcome-table th {
  font-weight: 800;
}

.outcome-table thead th {
  background: transparent;
  color: var(--muted);
  font-size: 0.74rem;
  line-height: 1.25;
}

.outcome-table tbody th {
  width: 22%;
  text-align: left;
}

.outcome-table td {
  font-weight: 800;
}

.outcome-table td.is-pass,
.outcome-table td.is-fail {
  text-transform: uppercase;
}

.outcome-table td.is-pass {
  color: #276749;
}

.outcome-table td.is-fail {
  color: #9b2c2c;
}

.outcome-table tr:last-child th,
.outcome-table tr:last-child td {
  border-bottom: 0;
}

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

.resource-list a {
  display: grid;
  gap: 3px;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface-muted);
  color: var(--text);
}

.resource-list a:hover {
  border-color: var(--accent);
  text-decoration: none;
}

.resource-list span {
  color: var(--muted);
}

pre {
  overflow-x: auto;
  margin: 18px 0 0;
  padding: 22px;
  border-radius: 18px;
  background: #17202a;
  color: #edf4f7;
  font-size: 0.92rem;
  line-height: 1.55;
}

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.site-footer {
  padding: 30px 0 46px;
  color: var(--muted);
  text-align: center;
}

.site-footer p {
  margin-bottom: 0;
}

@media (max-width: 760px) {
  .container {
    width: min(100% - 28px, 1160px);
  }

  .site-hero {
    padding-bottom: 48px;
  }

  .top-nav {
    flex-wrap: wrap;
    gap: 12px 18px;
    margin-bottom: 44px;
  }

  .section,
  .teaser-section {
    margin: 36px auto;
    padding: 24px;
    border-radius: 22px;
  }

  .card-grid,
  .subsection-grid,
  .comparison-video-grid,
  .rollout-groups,
  .video-grid {
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }

  .chart-header {
    display: grid;
  }
}