Componente di navigazione permanente

<nav class="sticky top-0 z-10 backdrop-filter backdrop-blur-lg bg-opacity-30 firefox-safari-fix bg-white border-b border-gray-200 dark:bg-gray-800 dark:border-gray-700">
  <div class="max-w-6xl mx-auto px-4">
    <div class="flex justify-between h-16">
      <div class="flex">
        <div class="flex-shrink-0 flex items-center">
          <span class="text-2xl font-bold text-gray-900 dark:text-white">Glassmorphism Nav</span>
        </div>
        <div class="hidden sm:ml-6 sm:flex sm:space-x-8">
          <a href="#" class="border-indigo-500 text-gray-900 dark:text-white inline-flex items-center px-1 pt-1 border-b-2 text-sm font-medium"> Dashboard </a>
          <a href="#" class="border-transparent text-gray-500 hover:border-gray-300 hover:text-gray-700 dark:text-gray-300 dark:hover:text-white inline-flex items-center px-1 pt-1 border-b-2 text-sm font-medium"> Team </a>
          <a href="#" class="border-transparent text-gray-500 hover:border-gray-300 hover:text-gray-700 dark:text-gray-300 dark:hover:text-white inline-flex items-center px-1 pt-1 border-b-2 text-sm font-medium"> Projects </a>
          <a href="#" class="border-transparent text-gray-500 hover:border-gray-300 hover:text-gray-700 dark:text-gray-300 dark:hover:text-white inline-flex items-center px-1 pt-1 border-b-2 text-sm font-medium"> Calendar </a>
        </div>
      </div>
      <div class="hidden sm:ml-6 sm:flex sm:items-center">
        <button class="bg-gray-100 p-1 rounded-full text-gray-400 hover:text-gray-500 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-indigo-500 dark:bg-gray-700 dark:text-gray-300 dark:hover:text-white">
          <span class="sr-only">View notifications</span>
          <!-- Heroicon name: outline/bell -->
          <svg class="h-6 w-6" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" aria-hidden="true">
            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 17h2a2 2 0 012 2v2H5v-2a2 2 0 012-2h2m-4 0V5a2 2 0 012-2h4a2 2 0 012 2v12m-4 0h.01m-4 0h.01m-4 0h.01M12 17v2m0-4h.01M8 7h.01M16 7h.01" />
          </svg>
        </button>

        <!-- Profile dropdown -->
        <div class="ml-3 relative">
          <div>
            <button type="button" class="bg-gray-100 flex text-sm rounded-full focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-indigo-500 dark:bg-gray-700" id="user-menu-button" aria-expanded="false" aria-haspopup="true">
              <span class="sr-only">Open user menu</span>
              <img class="h-8 w-8 rounded-full" src="https://randomuser.me/api/portraits/men/40.jpg" alt="">
            </button>
          </div>
        </div>
      </div>
      <div class="-mr-2 flex items-center sm:hidden">
        <!-- Mobile menu button -->
        <button type="button" class="inline-flex items-center justify-center p-2 rounded-md text-gray-400 hover:text-gray-500 hover:bg-gray-100 focus:outline-none focus:ring-2 focus:ring-inset focus:ring-indigo-500 dark:hover:bg-gray-700" aria-controls="mobile-menu" aria-expanded="false">
          <span class="sr-only">Open main menu</span>
          <!-- Icon when menu is closed. -->
          <svg class="block h-6 w-6" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" aria-hidden="true">
            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 6h16M4 12h16M4 18h16" />
          </svg>
          <!-- Icon when menu is open. -->
          <svg class="hidden h-6 w-6" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" aria-hidden="true">
            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M6 18L18 6M6 6l12 12" />
          </svg>
        </button>
      </div>
    </div>
  </div>

  <!-- Mobile menu, show/hide based on menu state. -->
  <div class="sm:hidden" id="mobile-menu">
    <div class="pt-2 pb-3 space-y-1">
      <a href="#" class="border-indigo-500 text-gray-700 block px-3 py-2 border-l-4 text-base font-medium dark:text-white">Dashboard</a>
      <a href="#" class="border-transparent text-gray-500 hover:bg-gray-50 hover:border-gray-300 hover:text-gray-700 block px-3 py-2 border-l-4 text-base font-medium dark:text-gray-300 dark:hover:bg-gray-700 dark:hover:text-white">Team</a>
      <a href="#" class="border-transparent text-gray-500 hover:bg-gray-50 hover:border-gray-300 hover:text-gray-700 block px-3 py-2 border-l-4 text-base font-medium dark:text-gray-300 dark:hover:bg-gray-700 dark:hover:text-white">Projects</a>
      <a href="#" class="border-transparent text-gray-500 hover:bg-gray-50 hover:border-gray-300 hover:text-gray-700 block px-3 py-2 border-l-4 text-base font-medium dark:text-gray-300 dark:hover:bg-gray-700 dark:hover:text-white">Calendar</a>
    </div>
    <div class="pt-4 pb-3 border-t border-gray-200 dark:border-gray-700">
      <div class="flex items-center px-5">
        <div class="flex-shrink-0">
          <img class="h-10 w-10 rounded-full" src="https://randomuser.me/api/portraits/men/40.jpg" alt="">
        </div>
        <div class="ml-3">
          <div class="text-base font-medium text-gray-800 dark:text-white">Tom Cook</div>
          <div class="text-sm font-medium text-gray-500 dark:text-gray-300">tom@example.com</div>
        </div>
        <button type="button" class="ml-auto flex-shrink-0 bg-gray-100 p-1 rounded-full text-gray-400 hover:text-gray-500 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-indigo-500 dark:bg-gray-700 dark:text-gray-300 dark:hover:text-white">
          <span class="sr-only">View notifications</span>
          <!-- Heroicon name: outline/bell -->
          <svg class="h-6 w-6" xmlns="http://www.w3.org/2000/svg" fill="none" viewBox="0 0 24 24" stroke="currentColor" aria-hidden="true">
            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M15 17h2a2 2 0 012 2v2H5v-2a2 2 0 012-2h2m-4 0V5a2 2 0 012-2h4a2 2 0 012 2v12m-4 0h.01m-4 0h.01m-4 0h.01M12 17v2m0-4h.01M8 7h.01M16 7h.01" />
          </svg>
        </button>
      </div>
      <div class="mt-3 space-y-1">
        <a href="#" class="block px-4 py-2 text-base font-medium text-gray-500 hover:text-gray-800 hover:bg-gray-100 dark:text-gray-300 dark:hover:bg-gray-700 dark:hover:text-white">Your Profile</a>
        <a href="#" class="block px-4 py-2 text-base font-medium text-gray-500 hover:text-gray-800 hover:bg-gray-100 dark:text-gray-300 dark:hover:bg-gray-700 dark:hover:text-white">Settings</a>
        <a href="#" class="block px-4 py-2 text-base font-medium text-gray-500 hover:text-gray-800 hover:bg-gray-100 dark:text-gray-300 dark:hover:bg-gray-700 dark:hover:text-white">Sign out</a>
      </div>
    </div>
  </div>
</nav>