:root {
  --bg: #fbfaf8;
  --text: #1d1d1b;
  --muted: #6b6a66;
  --link: #1f5fbf;
  --rule: #e4e2dd;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161615;
    --text: #ecebe8;
    --muted: #9c9a95;
    --link: #8ab4f8;
    --rule: #2e2d2b;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif;
}
main { max-width: 40rem; margin: 0 auto; padding: 3rem 1rem 4rem; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 0.5rem; }
h2 { font-size: 1.15rem; margin: 2rem 0 0.5rem; }
.lead { font-size: 1.2rem; color: var(--muted); }
.meta { color: var(--muted); font-size: 0.9rem; }
a { color: var(--link); }
ul { padding-left: 1.2rem; }
li { margin: 0.35rem 0; }
footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--rule); font-size: 0.95rem; }