:root { color-scheme: light dark; --fg: #1d1d1f; --muted: #6e6e73; --bg: #ffffff; --accent: #2f6fed; }
@media (prefers-color-scheme: dark) { :root { --fg: #f5f5f7; --muted: #a1a1a6; --bg: #111114; } }
* { box-sizing: border-box; }
body { margin: 0; font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", sans-serif; color: var(--fg); background: var(--bg); }
main { max-width: 680px; margin: 0 auto; padding: 64px 24px 96px; }
h1 { font-size: 40px; line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 8px; }
h2 { font-size: 22px; margin: 40px 0 8px; letter-spacing: -0.01em; }
p, li { color: var(--fg); }
.lead, .muted { color: var(--muted); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
nav { display: flex; gap: 20px; margin-bottom: 48px; font-size: 15px; }
footer { margin-top: 64px; font-size: 14px; color: var(--muted); }