スティッキーナビゲーションコンポーネント

<nav class="bg-gradient-to-r from-teal-400 to-blue-500 dark:from-gray-800 dark:to-gray-900 p-4 shadow-md sticky top-0 z-50">
  <div class="container mx-auto flex justify-between items-center">
    <!-- Blog Title -->
    <a href="#" class="text-white text-2xl font-bold dark:text-gray-100">Blog Title</a>

    <!-- Navigation Links -->
    <div class="hidden md:flex space-x-6">
      <a href="#" class="text-white hover:text-gray-100 dark:text-gray-300 dark:hover:text-white transition duration-300 ease-in-out">Home</a>
      <a href="#" class="text-white hover:text-gray-100 dark:text-gray-300 dark:hover:text-white transition duration-300 ease-in-out">Categories</a>
      <a href="#" class="text-white hover:text-gray-100 dark:text-gray-300 dark:hover:text-white transition duration-300 ease-in-out">About</a>
      <a href="#" class="text-white hover:text-gray-100 dark:text-gray-300 dark:hover:text-white transition duration-300 ease-in-out">Contact</a>
    </div>

    <!-- Mobile Menu Button (Hamburger) -->
    <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, can be shown with JS) -->
  <div class="md:hidden mt-4 space-y-2">
    <!-- Hidden for this pure HTML example as JS is not allowed -->
  </div>
</nav>