body {
    font-family: sans-serif;
}

h1, h2, h3, h4 {
    font-family: serif;
    color: FireBrick;
}

blockquote p {
    background: lightgrey;
    padding: 1ex;
    border-radius: 1ex;
}

.center {
    margin: auto;
    max-width: 80ex;
}