body {
    background-color:#eeeeee;
}

header, section {
    max-width:80em;
    margin-left:auto;
    margin-right:auto;
    background-color:#ffffff;
    border-radius:3px;
    padding:10px;
}

section {
    margin-top:10px;
}

h3 {
    margin:inherit;
    margin-bottom:10px;
}