:root { color-scheme: light dark; font-family: system-ui, sans-serif; }
body { max-width: 42rem; margin: 3rem auto; padding: 0 1rem; line-height: 1.5; }
header p { opacity: 0.7; }
h1 { margin-bottom: 0.25rem; }
section { margin: 2rem 0; }
footer { margin-top: 3rem; font-size: 0.85rem; opacity: 0.6; }
a { color: inherit; }