Composant Mega Menu

<nav class="bg-gradient-to-r from-purple-500 via-pink-500 to-red-500 dark:from-gray-800 dark:via-gray-700 dark:to-gray-600 shadow-xl">
  <div class="container mx-auto px-4 py-3 flex justify-between items-center">
    <div class="text-white text-2xl font-bold">BlogName</div>
    <div class="hidden md:flex space-x-6">
      <a href="#" class="text-white hover:text-gray-200 transition duration-300">Home</a>
      <div class="relative group">
        <button class="text-white hover:text-gray-200 transition duration-300">Categories</button>
        <div class="absolute z-10 invisible group-hover:visible bg-white dark:bg-gray-700 shadow-lg rounded-md p-6 mt-2 transition duration-300 transform translate-y-2 opacity-0 group-hover:opacity-100 group-hover:translate-y-0" style="perspective: 1000px;">
          <div class="grid grid-cols-2 gap-4" style="transform: rotateY(0deg);">
            <div class="space-y-2">
              <a href="#" class="block text-gray-800 dark:text-white hover:text-purple-600 dark:hover:text-purple-400 transition duration-300">Technology</a>
              <a href="#" class="block text-gray-800 dark:text-white hover:text-pink-600 dark:hover:text-pink-400 transition duration-300">Lifestyle</a>
              <a href="#" class="block text-gray-800 dark:text-white hover:text-red-600 dark:hover:text-red-400 transition duration-300">Travel</a>
            </div>
            <div class="space-y-2">
              <a href="#" class="block text-gray-800 dark:text-white hover:text-purple-600 dark:hover:text-purple-400 transition duration-300">Food</a>
              <a href="#" class="block text-gray-800 dark:text-white hover:text-pink-600 dark:hover:text-pink-400 transition duration-300">Fashion</a>
              <a href="#" class="block text-gray-800 dark:text-white hover:text-red-600 dark:hover:text-red-400 transition duration-300">Sports</a>
            </div>
          </div>
        </div>
      </div>
      <a href="#" class="text-white hover:text-gray-200 transition duration-300">About</a>
      <a href="#" class="text-white hover:text-gray-200 transition duration-300">Contact</a>
    </div>
    <div class="md:hidden">
      <button class="text-white focus:outline-none">
        <svg class="w-6 h-6" fill="none" stroke="currentColor" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M4 6h16M4 12h16M4 18h16"></path></svg>
      </button>
    </div>
  </div>

  <!-- Mobile Menu (hidden by default) -->
  <div class="mobile-menu hidden md:hidden bg-gradient-to-r from-purple-400 via-pink-400 to-red-400 dark:from-gray-700 dark:via-gray-600 dark:to-gray-500 py-4 px-4">
    <a href="#" class="block text-white hover:text-gray-200 transition duration-300 py-2">Home</a>
    <div class="relative group">
      <button class="block text-white hover:text-gray-200 transition duration-300 py-2">Categories</button>
      <div class="relative z-10 invisible group-hover:visible bg-white dark:bg-gray-700 shadow-lg rounded-md p-4 mt-2 transition duration-300">
        <div class="grid grid-cols-1 gap-2">
          <a href="#" class="block text-gray-800 dark:text-white hover:text-purple-600 dark:hover:text-purple-400 transition duration-300">Technology</a>
          <a href="#" class="block text-gray-800 dark:text-white hover:text-pink-600 dark:hover:text-pink-400 transition duration-300">Lifestyle</a>
          <a href="#" class="block text-gray-800 dark:text-white hover:text-red-600 dark:hover:text-red-400 transition duration-300">Travel</a>
          <a href="#" class="block text-gray-800 dark:text-white hover:text-purple-600 dark:hover:text-purple-400 transition duration-300">Food</a>
          <a href="#" class="block text-gray-800 dark:text-white hover:text-pink-600 dark:hover:text-pink-400 transition duration-300">Fashion</a>
          <a href="#" class="block text-gray-800 dark:text-white hover:text-red-600 dark:hover:text-red-400 transition duration-300">Sports</a>
        </div>
      </div>
    </div>
    <a href="#" class="block text-white hover:text-gray-200 transition duration-300 py-2">About</a>
    <a href="#" class="block text-white hover:text-gray-200 transition duration-300 py-2">Contact</a>
  </div>
</nav>