.nav-menu {
    background-color: var(--blue-4);
    box-shadow: 0 0 1px 1px var(--gold-3), inset 0 0 6px 3px var(--blue-3);
    border: 1px outset var(--gold-1);
}

.site-links {
    display: flex;
    flex-direction: column;
    gap: calc(var(--space) / 2);
    padding: var(--space);
}

.site-links > a, #nav-toc > .site-links, .nav-show {
    text-shadow: 0 0 2px var(--black);
    font-weight: bold;
    font-size: .9em;
    font-family: 'Libre Caslon', serif;
}

.site-links > a {
    display: flex;
    gap: var(--space);
}

#nav-toc:not(:has(ul > .nav-toclevel1)) {
    display: none;
}

.nav-menu a {
    color: var(--gold-1);
}

.nav-menu a:hover {
    color: var(--blue-2);
}

.nav-menu {
    display: flex;
    flex-direction: column;
}

#nav-toc {
    margin-top: calc(var(--space) * 6);
}

.nav-backtotop {
    display: flex;
    justify-content: center;
    gap: calc(var(--space) / 2);
    align-items: center;
}

.nav-show {
    border: none;
    background: none;
    padding: .6em;
    text-align: center;
    color: var(--gold-1);
    box-sizing: border-box;
    width: 100%;
}

.nav-external:last-of-type {
    display: none;
}