OAuth ボタンコンポーネント

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  <div class="absolute inset-0 bg-cover bg-center backdrop-filter backdrop-blur-lg" style="background-image: url('https://picsum.photos/1920/1080');"></div>
  <div class="relative container mx-auto px-4">
    <div class="max-w-md mx-auto bg-white dark:bg-gray-800 bg-opacity-20 dark:bg-opacity-20 rounded-xl shadow-lg p-8">
      <h2 class="text-2xl font-bold text-center text-gray-800 dark:text-white mb-6">Login</h2>
      <div class="flex flex-col space-y-4">
        <button class="flex items-center justify-center px-4 py-2 border border-gray-300 dark:border-gray-700 rounded-md shadow-sm text-sm font-medium text-gray-700 dark:text-gray-200 bg-white dark:bg-gray-800 hover:bg-gray-50 dark:hover:bg-gray-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-indigo-500">
          <img class="h-5 w-5 mr-2" src="/placeholder-google-logo.png" alt="Google Logo">
          Sign in with Google
        </button>
        <button class="flex items-center justify-center px-4 py-2 border border-gray-300 dark:border-gray-700 rounded-md shadow-sm text-sm font-medium text-gray-700 dark:text-gray-200 bg-white dark:bg-gray-800 hover:bg-gray-50 dark:hover:bg-gray-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-indigo-500">
          <img class="h-5 w-5 mr-2" src="/placeholder-facebook-logo.png" alt="Facebook Logo">
          Sign in with Facebook
        </button>
        <button class="flex items-center justify-center px-4 py-2 border border-gray-300 dark:border-gray-700 rounded-md shadow-sm text-sm font-medium text-gray-700 dark:text-gray-200 bg-white dark:bg-gray-800 hover:bg-gray-50 dark:hover:bg-gray-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-indigo-500">
          <img class="h-5 w-5 mr-2" src="/placeholder-twitter-logo.png" alt="Twitter Logo">
          Sign in with Twitter
        </button>
      </div>
    </div>
  </div>
</section>