:root { --bg: #fdfdfc; --fg: #1d1d1b; --muted: #5f5f5a; --link: #1f5fbf; --rule: #e2e2dd; }
@media (prefers-color-scheme: dark) {
  :root { --bg: #161615; --fg: #e8e8e3; --muted: #a3a39c; --link: #8ab4f8; --rule: #33332f; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; }
main { max-width: 40rem; margin: 0 auto; padding: 3rem 1rem 4rem; }
h1 { font-size: 1.6rem; line-height: 1.25; margin: 0 0 .25rem; }
h2 { font-size: 1.1rem; margin: 2rem 0 .5rem; }
.meta { color: var(--muted); margin: 0 0 2rem; }
a { color: var(--link); }
nav { border-top: 1px solid var(--rule); margin-top: 3rem; padding-top: 1rem; color: var(--muted); font-size: .9rem; }
nav a { margin-right: 1rem; }