body {
    font-family: sans;
    margin: 0;
    padding: 0;
}

header {
    width: 100%;
    clear: both;
}

article {
    margin-left: 18em;
    padding-left: 1em;
}

footer {
    clear: both;
    width: 100%;
}

header nav {
    overflow: hidden;
}

nav a,
header a {
    text-decoration: none;
    color: inherit;
}

header h1 span {
    margin-left: 1em;
    font-size: 50%;
    font-style: italic;
}

body > nav {
    float: left;
    width: 16em;
    padding-right: 1vw;
}

nav ul {
    list-style-type: none;
    list-style-position: outside;
    padding-left: 8px;
}

nav li ul {
    padding-left: 0.6em;
}

footer {
    overflow: hidden;
}