简约社交登录组件

<div class="flex flex-col items-center justify-center min-h-screen bg-gray-100 dark:bg-gray-900">
  <div class="w-full max-w-sm p-6 bg-white rounded-md shadow-md dark:bg-gray-800">
    <h1 class="text-2xl font-semibold text-center text-gray-700 dark:text-white">Login</h1>
    <div class="flex justify-center mt-4 space-x-4">
      <button class="px-4 py-2 text-gray-700 bg-gray-200 rounded-md dark:bg-gray-700 dark:text-gray-200">Facebook</button>
      <button class="px-4 py-2 text-gray-700 bg-gray-200 rounded-md dark:bg-gray-700 dark:text-gray-200">Google</button>
      <button class="px-4 py-2 text-gray-700 bg-gray-200 rounded-md dark:bg-gray-700 dark:text-gray-200">Twitter</button>
    </div>
  </div>
</div>