 font-medium text-gray-500 hover:bg-gray-100 hover:text-gray-700 dark:text-gray-400 dark:hover:bg-gray-800 dark:hover:text-gray-200"
          >
            Calendar
          </a>
        </li>
      </ul>
    </details>
  </li>

  <li>
    <a
      href="#"
      class="block rounded-lg px-4 py-2 text-sm font-medium text-gray-500 hover:bg-gray-100 hover:text-gray-700 dark:text-gray-400 dark:hover:bg-gray-800 dark:hover:text-gray-200"
    >
      Billing
    </a>
  </li>

  <li>
    <a
      href="#"
     