:root { color-scheme: light dark; }
body { font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", sans-serif; line-height: 1.8; max-width: 40rem; margin: 0 auto; padding: 1.5rem 1rem 3rem; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.2rem; margin-top: 2rem; }
nav a, footer a { margin-right: 1rem; }
footer { margin-top: 3rem; font-size: 0.9rem; }