body {
    display: grid;
    align-content: center;

    height: 100vh;

    font-family: Arial, Helvetica, sans-serif;
}

main {
    width: 100%;
    max-width: 50rem;
    padding: 0 2rem;
    margin: 0 auto;
}

main .github {
    display: block;
    margin-top: 1rem;
}