:root { color-scheme: light dark; --bg: #ffffff; --fg: #1c1c1e; --muted: #6e6e73; --accent: #0a84ff; }
@media (prefers-color-scheme: dark) { :root { --bg: #12171f; --fg: #f2f2f7; --muted: #a1a1a6; } }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 32px 16px 64px; }
h1 { font-size: 28px; margin: 0 0 4px; }
h2 { font-size: 20px; margin-top: 40px; }
.muted { color: var(--muted); }
a { color: var(--accent); }
nav { margin-bottom: 24px; }