body { font-family: system-ui, -apple-system, "Segoe UI", sans-serif; max-width: 40rem; margin: 2rem auto; padding: 0 1rem; line-height: 1.6; color: #1a1a1a; background: #fff; }
h1 { font-size: 1.6rem; } h2 { font-size: 1.15rem; margin-top: 2rem; }
footer { margin-top: 3rem; font-size: 0.9rem; color: #555; }
a { color: #0645ad; }
@media (prefers-color-scheme: dark) { body { color: #e6e6e6; background: #121212; } footer { color: #aaa; } a { color: #8ab4f8; } }