All nav menus use only JS (no CSS at all) - no classes and no IDs.
Each menu uses the same HTML codes:

      <nav>
        <ul>
          <li><span>Home</span></li>
          <li><span>About</span></li>
          <li><span>Projects</span></li>
          <li><span>Contact</span></li>
        </ul>
      </nav>