:root { color-scheme: light dark; --fg: #1d1b20; --muted: #5f5b66; --bg: #fdf8fd; --line: #ddd8e0; }
@media (prefers-color-scheme: dark) { :root { --fg: #e8e1e9; --muted: #b0aab5; --bg: #141218; --line: #3a3640; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 40rem; margin: 0 auto; padding: 4rem 1.5rem; }
h1 { font-size: 2.4rem; line-height: 1.1; margin: 0 0 1rem; letter-spacing: -0.02em; }
h2 { font-size: 1.2rem; margin: 2rem 0 0.5rem; }
p { margin: 0 0 1rem; }
.lead { font-size: 1.25rem; }
.muted { color: var(--muted); }
footer { margin-top: 3rem; padding-top: 1rem; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.95rem; }
a { color: inherit; }