LoginSignupコンポーネント

<div class="min-h-screen flex items-center justify-center bg-gray-50 dark:bg-gray-800 p-6">
  <div class="bg-white dark:bg-gray-900 rounded-3xl shadow-lg p-8 max-w-md w-full">
    <h2 class="text-2xl font-bold text-center text-gray-800 dark:text-gray-200 mb-6">Join Us</h2>
    <form>
      <div class="mb-4">
        <input type="text" placeholder="Username" class="w-full p-4 text-gray-700 dark:text-gray-300 rounded-md border border-gray-300 dark:border-gray-700 focus:outline-none focus:ring-2 focus:ring-blue-400 dark:focus:ring-blue-600 shadow-inner" />
      </div>
      <div class="mb-6">
        <input type="email" placeholder="Email Address" class="w-full p-4 text-gray-700 dark:text-gray-300 rounded-md border border-gray-300 dark:border-gray-700 focus:outline-none focus:ring-2 focus:ring-blue-400 dark:focus:ring-blue-600 shadow-inner" />
      </div>
      <div class="mb-6">
        <input type="password" placeholder="Password" class="w-full p-4 text-gray-700 dark:text-gray-300 rounded-md border border-gray-300 dark:border-gray-700 focus:outline-none focus:ring-2 focus:ring-blue-400 dark:focus:ring-blue-600 shadow-inner" />
      </div>
      <button type="submit" class="w-full bg-blue-500 text-white rounded-md p-4 hover:bg-blue-600 shadow-xl transition duration-200">Sign Up</button>
    </form>
    <div class="text-center mt-4">
      <span class="text-gray-600 dark:text-gray-400">or</span>
    </div>
    <button class="w-full mt-4 bg-gray-200 rounded-md p-4 flex items-center justify-around hover:bg-gray-300 dark:bg-gray-700 dark:hover:bg-gray-600 shadow-md transition duration-200">
      <img src="https://randomuser.me/api/portraits/men/32.jpg" alt="Google" class="w-6 h-6 rounded-full">
      <span class="text-gray-800 dark:text-gray-200">Continue with Google</span>
    </button>
    <div class="text-center mt-4">
      <p class="text-gray-600 dark:text-gray-400">Already have an account? <a href="#" class="text-blue-500 hover:underline">Log In</a></p>
    </div>
  </div>
</div>