body {
    font-family: sans-serif;

    max-width: 55em;

    margin: auto;
    margin-top: 2em;
    margin-bottom: 2em;

    padding-left: 4em;
    padding-right: 4em;

    text-align: justify;
    line-height: 1.3;

    background-color: seashell;
}