:root {
  --bg: #f4efe4;
  --text: #2b2a26;
  --muted: #6b665c;
  --link: #1f6f8b;
  --rule: #ddd5c4;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1c1d1f;
    --text: #ece8df;
    --muted: #a8a294;
    --link: #7cc4dc;
    --rule: #3a3a38;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 680px; margin: 0 auto; padding: 40px 16px 64px; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 4px; }
h2 { font-size: 1.15rem; margin: 32px 0 8px; }
.sub { color: var(--muted); margin: 0 0 24px; }
a { color: var(--link); }
nav { border-top: 1px solid var(--rule); margin-top: 48px; padding-top: 16px; color: var(--muted); }
nav a { margin-right: 16px; }