カートに入れるボタン

<button class="bg-red-600 dark:bg-purple-600 text-white dark:text-black font-bold py-2 px-4 rounded border-4 border-black dark:border-white hover:bg-red-700 dark:hover:bg-purple-700 focus:outline-none focus:ring-2 focus:ring-black dark:focus:ring-white transition duration-300 ease-in-out">
  Add to Cart
</button>