:root { --bg: #fbfaf7; --fg: #1d1d1b; --muted: #6b6a66; --accent: #2f5d50; }
@media (prefers-color-scheme: dark) { :root { --bg: #161615; --fg: #ecebe6; --muted: #9a9993; --accent: #8fc1b0; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
main { max-width: 640px; margin: 0 auto; padding: 56px 16px 80px; }
h1 { font-size: 2rem; margin: 0 0 8px; letter-spacing: -0.01em; }
h2 { font-size: 1.1rem; margin: 32px 0 6px; }
p, li { margin: 0 0 12px; }
.muted { color: var(--muted); }
a { color: var(--accent); }
footer { margin-top: 48px; font-size: 0.9rem; color: var(--muted); }