html {
    margin: 0 auto;
    max-width: 40rem;
}

body {
    font-family: sans-serif;
    background-color: black;
    color: hotpink;
    border: 1rem double purple;
    padding: 1rem;
}

#title {
    text-align: center;
}

.subtitle {
    font-style: italic;
}