header, section, footer, aside, nav, article, figure {
    display: block;
}

body {
    background-color: black;
    color: lightgray;
    font-size: 1.5em;
    font-family: monospace;
    margin: auto;
    max-width: 80ch;
}

strong, header, h1, h2, h3, h4, h5, h6 {
    color: gold;
}

em, a {
    color: cyan;
}

nav h2 {
    display: none;
}

nav, nav ul {
    margin: 0;
    padding: 0;
}

nav li::before { 
    content: "| ";
}

nav li a {
    background-color: lightgray;
    color: black;
}

nav li {
    display: inline;
}

body > nav {
    position: fixed;
    z-index: 1;
    top: 0;
    left: auto;
    width: 100%;
    padding: 0;
    background-color: black;
}

body > header > h1, body > header > h3 {
    display: inline-block;
}

body > header > h3::before {
    content: " -- ";
}