:root { color-scheme: light dark; font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; line-height: 1.6; }
body { margin: 0; background: #121417; color: #e3e6ea; }
@media (prefers-color-scheme: light) { body { background: #f6f5f1; color: #1d2126; } }
main { max-width: 720px; margin: 0 auto; padding: 24px 18px 60px; }
h1 { font-size: 1.8rem; margin-bottom: 4px; }
h2 { font-size: 1.15rem; margin-top: 28px; }
a { color: #3daee9; }
.muted { opacity: .7; }