body {
    padding: 1.0em;
    font-family: arial;
}
a, a:active, a:visited {
    color: black;
}
a:hover {
    color: #555;
}
.main {
    width: 100%;
    max-width: 650px;
    margin: auto;
}
.nav-links {
    margin-top: 2.0em;
    font-size: 0.8em;
    text-align: center;
}