:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --fg: #1d1d1f;
  --muted: #6e6e73;
  --rule: #e5e5ea;
  --link: #0a66ff;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121214;
    --fg: #f2f2f4;
    --muted: #98989f;
    --rule: #2c2c30;
    --link: #4d8dff;
  }
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  padding: 3rem 1.25rem 5rem;
}
main { max-width: 40rem; margin: 0 auto; }
h1 { font-size: 1.75rem; line-height: 1.2; letter-spacing: -0.02em; margin-bottom: 0.5rem; }
h2 { font-size: 1.15rem; letter-spacing: -0.01em; margin: 2.25rem 0 0.5rem; }
p, ul { margin-bottom: 0.9rem; }
ul { padding-left: 1.25rem; }
li { margin-bottom: 0.35rem; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
.meta { color: var(--muted); font-size: 0.9rem; margin-bottom: 2rem; }
footer {
  max-width: 40rem;
  margin: 4rem auto 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.9rem;
}
footer nav a { color: var(--muted); margin-right: 1rem; }