:root {
  color-scheme: light dark;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --link: #0a5bd3;
  --bg: #ffffff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --text: #f5f5f7;
    --muted: #a1a1a6;
    --link: #6aa8ff;
    --bg: #111113;
  }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
main {
  max-width: 40rem;
  margin: 0 auto;
  padding: 3rem 1rem 4rem;
}
h1 { font-size: 1.9rem; line-height: 1.2; }
h2 { font-size: 1.2rem; margin-top: 2rem; }
a { color: var(--link); }
code { font-size: 0.9em; }
.updated { color: var(--muted); font-size: 0.9rem; }