/* Make navigation section titles bold */
.md-nav__item--nested > .md-nav__link {
    font-weight: 700;
}

/* Indent submenu items */
.md-nav--secondary .md-nav__item {
    padding-left: 0.6rem;
}

/* Indent nested navigation items in sidebar */
.md-nav__item .md-nav .md-nav__link {
    padding-left: 1.2rem;
}