:root { color-scheme: light dark; --bg: #f4f3f0; --fg: #0b0b0b; --muted: #52514e; }
@media (prefers-color-scheme: dark) { :root { --bg: #111110; --fg: #f0efec; --muted: #c3c2b7; } }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 64px 20px; }
h1 { font-size: 40px; letter-spacing: -.02em; margin: 0 0 12px; }
.muted { color: var(--muted); font-size: 15px; }
code { font-size: 14px; }