body {
    margin: 5vw auto;
}

nav {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
}

nav * {
    margin-top: 0;
}

hgroup {
    text-align: center;
}

hgroup *:first-child {
    margin-bottom: 0;
}

hgroup *:last-child {
    margin-top: 0;
}

:root {
    --line-height: 1rem;
}

li {
    margin-top: 0.2rem;
}