:root { color-scheme: light dark; --bg: #ffffff; --fg: #15181d; --muted: #5b6470; --accent: #0a84a8; --line: #e3e7ec; }
@media (prefers-color-scheme: dark) { :root { --bg: #0e1116; --fg: #e8ecf1; --muted: #9aa5b1; --accent: #4cc3e6; --line: #262c35; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 48px 20px 72px; }
h1 { font-size: 2rem; line-height: 1.2; margin: 0 0 8px; }
h2 { font-size: 1.2rem; margin: 36px 0 8px; }
p, li { margin: 8px 0; }
a { color: var(--accent); }
.lead { color: var(--muted); margin-bottom: 24px; }
nav { display: flex; gap: 18px; margin-bottom: 36px; padding-bottom: 12px; border-bottom: 1px solid var(--line); font-size: 0.95rem; }
nav strong { margin-right: auto; }
footer { margin-top: 48px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 0.9rem; }