body {
    font-family: sans-serif;
    background-color: gainsboro;
}

#cont {
    margin-left: auto;
    margin-right: auto;
    margin-top: 5em;
    background-color: whitesmoke;
    max-width: 50rem;
    padding: 1em 2em;
}
h2 {
    text-align: center;
}