:root { color-scheme: light dark; }
body { font: 16px/1.6 system-ui, sans-serif; margin: 0; display: flex; flex-direction: column; min-height: 100vh; }
main { margin: auto; max-width: 34rem; padding: 2rem; }
h1 { font-size: 1.5rem; margin-bottom: .25rem; }
footer { padding: 1rem 2rem; opacity: .55; font-size: .85rem; }