:root { color-scheme: light dark; --bg: #ffffff; --fg: #111111; --muted: #555555; --line: #e2e2e5; --tint: #007aff; }
@media (prefers-color-scheme: dark) { :root { --bg: #000000; --fg: #f2f2f7; --muted: #aeaeb2; --line: #38383a; --tint: #0a84ff; } }
* { box-sizing: border-box; }
body { margin: 0 auto; padding: 32px 16px 64px; max-width: 46rem; background: var(--bg); color: var(--fg);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
h1 { font-size: 2rem; letter-spacing: -0.02em; margin: 0 0 0.25em; }
h2 { font-size: 1.25rem; margin: 2em 0 0.5em; }
a { color: var(--tint); }
p, li { color: var(--fg); }
.muted { color: var(--muted); font-size: 0.9rem; }
nav { border-bottom: 1px solid var(--line); padding-bottom: 16px; margin-bottom: 32px; display: flex; gap: 16px; flex-wrap: wrap; }
footer { border-top: 1px solid var(--line); margin-top: 48px; padding-top: 16px; }