/* Increase left indent of nested items */
.md-nav__item .md-nav__link { padding-left: .5rem; }
.md-nav__item .md-nav__item .md-nav__link { padding-left: 1.25rem; }
.md-nav__item .md-nav__item .md-nav__item .md-nav__link { padding-left: 2rem; }

/* Optional: slightly bolder section labels */
.md-nav__title { font-weight: 600; }