:root { --bg: #ffffff; --text: #1d2330; --muted: #5b6475; --accent: #4f46e5; }
@media (prefers-color-scheme: dark) { :root { --bg: #12151c; --text: #e6e9ef; --muted: #9aa3b5; --accent: #8b85ff; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
header a, footer a, a { color: var(--accent); }
h1 { font-size: 1.8rem; line-height: 1.25; }
h2 { font-size: 1.2rem; margin-top: 2rem; }
.muted, footer { color: var(--muted); font-size: 0.92rem; }
footer { border-top: 1px solid #8884; margin-top: 3rem; padding-top: 1rem; }
nav a { margin-right: 1rem; }