docs/styles/nav.scss

table.nav {
    padding-right: 1px;
    padding-bottom: 1px;
}

table.nav td,
table.nav th {
    display: inline-block;
    margin-right: -1px;
    margin-bottom: -1px;
}

.nav a {
    display: block;
    padding: 4px 8px;
}