:root {
  --bg: #ffffff;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --rule: #e5e5ea;
  --link: #0a66c2;
  --card: #f5f5f7;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --text: #f5f5f7;
    --muted: #a1a1a6;
    --rule: #2c2c2e;
    --link: #4da3ff;
    --card: #1c1c1e;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}
main, header, footer { max-width: 40rem; margin: 0 auto; padding: 0 16px; }
header { padding-top: 2rem; }
header a { color: var(--muted); text-decoration: none; font-size: 0.9rem; }
h1 { font-size: 2rem; line-height: 1.2; margin: 1.5rem 0 0.5rem; }
h2 { font-size: 1.15rem; margin: 2rem 0 0.25rem; }
p, li { margin: 0.5rem 0; }
.lede { color: var(--muted); font-size: 1.1rem; margin-top: 0; }
.updated { color: var(--muted); font-size: 0.9rem; }
a { color: var(--link); }
.card { background: var(--card); border-radius: 12px; padding: 1rem 1.25rem; margin: 1.5rem 0; }
.card p { margin: 0.25rem 0; }
footer { margin-top: 3rem; padding-top: 1rem; padding-bottom: 2rem; border-top: 1px solid var(--rule); color: var(--muted); font-size: 0.9rem; }
footer a { color: var(--muted); margin-right: 1rem; }