:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --ink: #1d1d1b;
  --muted: #5f5d57;
  --line: #e4e1d8;
  --accent: #0b6b74;
  --accent-soft: #e3f0f0;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141412;
    --surface: #1c1c1a;
    --ink: #ecebe6;
    --muted: #a3a199;
    --line: #2f2e2a;
    --accent: #5fb8bf;
    --accent-soft: #1f3032;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }
header.top { border-bottom: 1px solid var(--line); }
header.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 60px; }
.brand { font-weight: 700; letter-spacing: 0.04em; color: var(--ink); text-decoration: none; }
nav a { color: var(--muted); text-decoration: none; margin-left: 20px; font-size: 0.95rem; }
nav a:hover, nav a[aria-current="page"] { color: var(--ink); }
main { padding: 48px 0 64px; }
h1 { font-size: clamp(1.8rem, 4vw, 2.4rem); line-height: 1.2; margin: 0 0 12px; letter-spacing: -0.01em; }
h2 { font-size: 1.25rem; margin: 48px 0 12px; scroll-margin-top: 24px; }
.lede { color: var(--muted); font-size: 1.1rem; margin: 0 0 8px; }
.cards { display: grid; gap: 12px; margin-top: 16px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; }
.card h3 { margin: 0 0 4px; font-size: 1.05rem; }
.card p { margin: 0 0 10px; color: var(--muted); }
.links { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 0; padding: 0; list-style: none; font-size: 0.95rem; }
.note { background: var(--accent-soft); border-radius: 12px; padding: 14px 18px; margin-top: 16px; }
.note p { margin: 0; }
dl.facts { display: grid; grid-template-columns: max-content 1fr; gap: 6px 20px; margin: 12px 0 0; }
dl.facts dt { color: var(--muted); }
dl.facts dd { margin: 0; }
@media (max-width: 520px) {
  dl.facts { grid-template-columns: 1fr; gap: 2px; }
  dl.facts dd { margin-bottom: 10px; }
  nav a { margin-left: 14px; }
}
footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; }
footer .wrap { padding: 20px 16px 32px; }