:root {
  color-scheme: light;
  --bg: #f8fafc;
  --panel: #ffffff;
  --ink: #111827;
  --muted: #526070;
  --line: #d8dee8;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --chip: #eef2ff;
  --soft: #eef6ff;
  --good: #0f766e;
  --code: #f1f5f9;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

a {
  color: var(--accent-dark);
}

.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 20px 56px;
}

.page.narrow {
  max-width: 980px;
}

.top-link {
  margin-bottom: 18px;
}

.top-link a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  color: var(--accent-dark);
  font-weight: 650;
  text-decoration: none;
}

.top-link a:hover {
  text-decoration: underline;
}

.hero {
  display: grid;
  gap: 18px;
  padding: 18px 0 28px;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0;
  color: var(--accent-dark);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  max-width: 1040px;
  font-size: clamp(1.8rem, 3.6vw, 3rem);
  line-height: 1.08;
}

.lead {
  max-width: 820px;
  margin: 0;
  color: var(--muted);
  font-size: 1.1rem;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 8px 12px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: white;
  text-decoration: none;
  font-weight: 650;
}

.button.secondary {
  background: white;
  color: var(--accent-dark);
  border-color: var(--line);
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 10px;
}

.metric {
  padding: 14px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.metric strong {
  display: block;
  font-size: 1.35rem;
}

.metric span {
  color: var(--muted);
  font-size: 0.9rem;
}

.section {
  margin-top: 34px;
}

.section h2 {
  margin: 0 0 12px;
  font-size: 1.5rem;
}

.section h3 {
  margin: 22px 0 8px;
  font-size: 1.1rem;
}

.explain-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.explain {
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 14px;
}

.explain strong {
  display: block;
  margin-bottom: 6px;
}

.dataset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
}

.dataset-card {
  display: grid;
  gap: 12px;
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 14px;
}

.dataset-card h2 {
  margin: 0;
  font-size: 1.15rem;
}

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

.card-link {
  color: inherit;
  text-decoration: none;
}

.card-link:hover h2 {
  color: var(--accent-dark);
}

.figure-wrap {
  aspect-ratio: 1 / 1;
  border: 1px solid var(--line);
  background: #fff;
  overflow: hidden;
}

.figure-wrap img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

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

.stats div {
  min-width: 0;
  padding: 8px;
  background: #f8fafc;
  border: 1px solid #edf1f7;
}

.stats strong {
  display: block;
  font-size: 0.9rem;
}

.stats span {
  color: var(--muted);
  font-size: 0.84rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  padding: 4px 7px;
  background: var(--chip);
  color: var(--accent-dark);
  font-size: 0.78rem;
}

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

.downloads a,
.downloads span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 7px 9px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--accent-dark);
  text-decoration: none;
  font-size: 0.9rem;
}

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

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: white;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

th,
td {
  padding: 9px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: #f8fafc;
  font-weight: 700;
}

td.numeric,
th.numeric {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.best {
  color: var(--good);
  font-weight: 700;
}

.detail-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.detail-figure {
  display: grid;
  grid-template-columns: minmax(280px, 440px) 1fr;
  gap: 22px;
  align-items: start;
}

.code {
  padding: 2px 5px;
  background: var(--code);
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: 0.9em;
}

@media (max-width: 760px) {
  .summary-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .explain-grid,
  .detail-figure {
    grid-template-columns: 1fr;
  }

  .detail-header {
    display: grid;
  }
}