:root { color-scheme: light dark; font-family: system-ui, sans-serif; }
body { display: grid; min-height: 100vh; margin: 0; place-items: center; }
main { max-width: 34rem; padding: 2rem; text-align: center; }
h1 { margin: 0 0 .75rem; font-size: 2rem; }
p { line-height: 1.55; opacity: .8; }