rapids/docs/stylesheets/extra.css

@media screen and (min-width: 76.25em) {
    .md-nav__item--section {
        display: block;
        margin: 1.75em 0;
    }

    .md-nav :not(.md-nav--primary) > .md-nav__list {
        padding-left: 7px;
    }
}
.md-nav__item .md-nav__link--active {
    color: var(--md-typeset-a-color);
    background-color: var(--md-code-bg-color);
}