:root { color-scheme: light dark; }

body {
    font-family: system-ui, sans-serif;
    margin: 0;
    min-height: 100vh;
    display: grid;
    place-items: center;
}

main { text-align: center; }

h1 { margin: 0 0 .25rem; font-size: 2rem; }
p  { margin: 0; opacity: .7; }