html, body {
    height: 100%;
    margin: 0;
}

main {
    min-height: 100vh;
    min-height: 100svh;
    min-height: 100dvh;
    display: grid;
    place-items: center;
    padding: 1rem;
    box-sizing: border-box;
}

main h1 {
    margin: 0;
    font-size: clamp(2rem, 8vw, 5rem);
    text-align: center;
}