document.getElementById('item6').addEventListener('click', function(e) {
  if (window.innerWidth < 768) {
    // If the dropdown item is marked as selected, let it navigate normally.
    if (this.parentElement.classList.contains('selected')) {
      return;
    }
    e.preventDefault();
    this.parentElement.classList.toggle('active');
  }
});
document.addEventListener('click', function(e) {
  if (window.innerWidth < 768) {
    var activeDropdown = document.querySelector('.dropdown.active');
    if (activeDropdown && !activeDropdown.contains(e.target)) {
      activeDropdown.classList.remove('active');
    }
  }
});