:root {
  --bg: #fbfbfa;
  --fg: #1d1d1b;
  --muted: #5d5d58;
  --rule: #e2e1dc;
  --link: #1f5fbf;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161615;
    --fg: #ecebe6;
    --muted: #a3a29b;
    --rule: #33322f;
    --link: #8db4ff;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 42rem; margin: 0 auto; padding: 2.5rem 1rem 4rem; }
h1 { font-size: 1.9rem; line-height: 1.2; margin: 0 0 0.5rem; }
h2 { font-size: 1.2rem; margin: 2rem 0 0.5rem; }
p, li { margin: 0.5rem 0; }
.muted { color: var(--muted); }
a { color: var(--link); }
footer { border-top: 1px solid var(--rule); margin-top: 3rem; padding-top: 1rem; font-size: 0.9rem; color: var(--muted); }
footer a { margin-right: 1rem; }