:root {
  --bg: #ffffff;
  --fg: #1d2330;
  --muted: #5b6475;
  --accent: #0f7f86;
  --rule: #e3e6ec;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11151c;
    --fg: #e6e9ef;
    --muted: #9aa3b2;
    --accent: #4fc3c9;
    --rule: #262c37;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 44rem; margin: 0 auto; padding: 2.5rem 1rem 4rem; }
header a, footer a, a { color: var(--accent); }
h1 { font-size: 1.9rem; line-height: 1.25; margin: 0 0 .25rem; }
h2 { font-size: 1.2rem; margin: 2rem 0 .5rem; }
p.meta, footer { color: var(--muted); font-size: .9rem; }
footer { border-top: 1px solid var(--rule); margin-top: 3rem; padding-top: 1rem; }
nav { font-size: .9rem; margin-bottom: 2rem; }
ul { padding-left: 1.25rem; }