:root { color-scheme: light dark; --fg: #1a1a1a; --bg: #fafafa; --muted: #666; }
@media (prefers-color-scheme: dark) { :root { --fg: #eaeaea; --bg: #111; --muted: #999; } }
html { font: 17px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; color: var(--fg); background: var(--bg); }
body { margin: 0; }
main { max-width: 42rem; margin: 12vh auto; padding: 0 1.25rem; }
h1 { font-size: 2rem; margin: 0 0 1rem; }
.muted { color: var(--muted); }
code { font-size: 0.95em; }
a { color: inherit; }