:root{color-scheme:light dark}*{box-sizing:border-box}body,html{margin:0;padding:0;font-family:system-ui,-apple-system,sans-serif;line-height:1.5}main{min-height:100dvh;display:grid;place-items:center;padding:2rem;text-align:center}h1{margin:0 0 .5rem}