:root {
    color-scheme: dark;
    font-family: system-ui, sans-serif;
    background: #111827;
    color: #f9fafb;
}

body {
    min-height: 100vh;
    margin: 0;
    display: grid;
    place-items: center;
}

main {
    text-align: center;
}

output {
    display: block;
    color: #67e8f9;
    font-size: 6rem;
    font-weight: 700;
}