:root {
    --heading-family: sans-serif;
    --body-family: serif;

    --body-font-size: 18px;
}

body {
    margin: auto;
    max-width: 800px;
    font-size: var(--body-font-size);
    font-family: var(--body-family);
    box-sizing: padding-box;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--heading-family);
}

li, p {
    font-size: 1em;
}

hgroup {
    margin-bottom: 1.5em;
}

hgroup h1,
hgroup h2,
hgroup h3,
hgroup h4,
hgroup h5,
hgroup h6 {
    margin-bottom: 4px;
}

section.section {
    padding: 1em;
}

main {
    position: relative;
}

nav.quick-nav {
    position: fixed;
    padding: 1em;
    top: 0;
    right: 0;
}

header, footer {
    padding: 2em 1em;
}

header h1 {
    margin: 0px;
}

@media (max-width: 480px) {
    nav.quick-nav {
        position: relative;
    }
}