body { font-family: system-ui, sans-serif; max-width: 42rem; margin: 3rem auto; padding: 0 1rem; line-height: 1.6; color: #222; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.15rem; margin-top: 2rem; }
a { color: #0b57d0; }
footer { margin-top: 3rem; font-size: 0.9rem; color: #666; }
@media (prefers-color-scheme: dark) { body { background: #111; color: #ddd; } a { color: #8ab4f8; } footer { color: #999; } }