:root { --bg: #ffffff; --fg: #1d1d1f; --muted: #6e6e73; --link: #0b57d0; color-scheme: light dark; }
@media (prefers-color-scheme: dark) { :root { --bg: #161618; --fg: #ececee; --muted: #9a9aa0; --link: #8ab4f8; } }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.55 -apple-system, system-ui, "Segoe UI", Roboto, sans-serif; }
main { max-width: 640px; margin: 0 auto; padding: 48px 16px 64px; }
h1 { font-size: 28px; margin: 0 0 16px; }
h2 { font-size: 18px; margin: 28px 0 6px; }
a { color: var(--link); }
.muted { color: var(--muted); }