@media screen and (min-width: 60rem) {
    body {
        margin: 0 auto;
        width: 50rem;
    }
}

@media screen and (max-width: 60rem) {
    body {
        margin: 0 auto;
        width: auto;
    }
}

header {
    height: 5rem;
    margin-bottom: 2rem;
}

footer {
    width: 100%;
    margin-top: 2rem;
    background-color: #646d7d;
    font-size: 60%;
    text-align: center;
    line-height: normal;
}