:root {
  --bg: #faf9f6;
  --fg: #1c1b18;
  --muted: #5c5a54;
  --accent: #0b6e5c;
  --accent-soft: #e3f1ed;
  --border: #d9d6cf;
  --card: #ffffff;
  --ok: #0b6e5c;
  --warn: #a05a00;
  --bad: #a32020;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--fg);
  background: var(--bg);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--fg);
  color: var(--bg);
  padding: 0.5rem 1rem;
  z-index: 10;
}
.skip-link:focus {
  left: 0;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--card);
}
.site-header nav {
  max-width: 60rem;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
}
.brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--fg);
  text-decoration: none;
}
.site-header ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-header a {
  color: var(--fg);
  text-decoration: none;
}
.site-header a:hover { text-decoration: underline; }
.site-header a[aria-current="page"] {
  color: var(--accent);
  font-weight: 600;
}

main {
  max-width: 60rem;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

h1 { font-size: 2rem; margin: 0 0 0.75rem; }
h2 { font-size: 1.35rem; margin: 2rem 0 0.6rem; }

.hero { margin-bottom: 1.5rem; }
.tagline { font-size: 1.15rem; color: var(--muted); }
.status-line { margin-top: 0.75rem; }

.scoreboard {
  display: inline-block;
  margin-top: 0.9rem;
  padding: 0.5rem 0.9rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85rem;
  color: var(--fg);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 6px;
}

blockquote {
  margin: 1rem 0;
  padding: 0.75rem 1rem;
  border-left: 4px solid var(--accent);
  background: var(--accent-soft);
  font-style: italic;
}

a { color: var(--accent); }
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.method-list li { margin-bottom: 0.4rem; }

.status-list {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.35rem 1.5rem;
  margin: 0.5rem 0;
}
.status-list dt { font-weight: 600; }
.status-list dd { margin: 0; }

.provisional {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--warn);
  border: 1px solid var(--warn);
  border-radius: 999px;
  padding: 0.1rem 0.6rem;
  vertical-align: middle;
}

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(16rem, 1fr));
  gap: 1.25rem;
  margin-top: 1rem;
}
.gallery .empty {
  grid-column: 1 / -1;
  color: var(--muted);
  font-style: italic;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.9rem;
}
.card img, .card svg {
  width: 100%;
  height: auto;
  border-radius: 4px;
}
.card .meta { font-size: 0.85rem; color: var(--muted); margin-top: 0.5rem; }
.card h3 { margin: 0.6rem 0 0; font-size: 1rem; }
.card .links { font-size: 0.9rem; margin-top: 0.35rem; }

.lead { font-size: 1.05rem; color: var(--muted); margin: 0 0 1.5rem; }
.updated { color: var(--muted); font-size: 0.9rem; }

.item { margin-top: 2.25rem; scroll-margin-top: 1rem; }
.item h2 { margin-top: 0; }
.item .caption { margin-top: -0.25rem; }
.item .tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ok);
  border: 1px solid var(--ok);
  border-radius: 999px;
  padding: 0.1rem 0.6rem;
  vertical-align: middle;
}
.item.legacy .tag { display: none; }
.item.legacy { border-top: 1px dashed var(--border); padding-top: 1.25rem; }

.pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-top: 0.75rem;
}
.pair .card img, .pair .card svg { border: 1px solid var(--border); }

.dataset-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin: 1rem 0 1.5rem;
}

.table-wrap { overflow-x: auto; }
table.stats {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  background: var(--card);
}
table.stats th, table.stats td {
  border: 1px solid var(--border);
  padding: 0.45rem 0.6rem;
  text-align: left;
  vertical-align: top;
}
table.stats th {
  background: var(--accent-soft);
  font-weight: 600;
  white-space: nowrap;
}
table.stats .num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }

footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem 1rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}
footer a { color: var(--muted); }

@media (max-width: 40rem) {
  h1 { font-size: 1.6rem; }
  .site-header nav { flex-direction: column; align-items: flex-start; }
  .status-list { grid-template-columns: 1fr; gap: 0.15rem; }
  .status-list dt { margin-top: 0.5rem; }
  .pair { grid-template-columns: 1fr; }
}