:root { --bg: #f7f8fa; --fg: #1c2330; --muted: #667085; --accent: #2f5fd0; }
@media (prefers-color-scheme: dark) { :root { --bg: #14171c; --fg: #e6e8eb; --muted: #98a2b3; --accent: #7aa2ff; } }
* { box-sizing: border-box; }
body { margin: 0; padding: 32px 16px; font: 16px/1.6 system-ui, -apple-system, "Segoe UI", sans-serif; background: var(--bg); color: var(--fg); }
main { max-width: 680px; margin: 0 auto; }
h1 { margin-top: 0; }
a { color: var(--accent); }
footer { margin-top: 40px; color: var(--muted); font-size: 14px; }