認証コンポーネント

<div class="min-h-screen flex items-center justify-center bg-gray-100 dark:bg-gray-900 p-4">
    <div class="bg-white dark:bg-gray-800 rounded-lg shadow-md p-8 w-full max-w-sm">
        <h2 class="text-2xl font-semibold text-center text-gray-800 dark:text-gray-200">Welcome Back!</h2>
        <p class="text-gray-600 dark:text-gray-400 text-center mb-6">Please login to your account</p>
        <form>
            <div class="mb-4">
                <label class="block text-gray-700 dark:text-gray-300" for="email">Email</label>
                <input type="email" id="email" name="email" class="w-full p-2 border rounded-lg border-gray-300 dark:border-gray-600 bg-gray-50 dark:bg-gray-700 text-gray-800 dark:text-gray-200 focus:outline-none focus:border-blue-500 dark:focus:border-blue-400" required>
            </div>
            <div class="mb-6">
                <label class="block text-gray-700 dark:text-gray-300" for="password">Password</label>
                <input type="password" id="password" name="password" class="w-full p-2 border rounded-lg border-gray-300 dark:border-gray-600 bg-gray-50 dark:bg-gray-700 text-gray-800 dark:text-gray-200 focus:outline-none focus:border-blue-500 dark:focus:border-blue-400" required>
            </div>
            <button type="submit" class="w-full py-2 bg-blue-600 text-white rounded-lg hover:bg-blue-700 dark:bg-blue-500 dark:hover:bg-blue-400 transition duration-150">Login</button>
        </form>
        <p class="mt-4 text-center text-gray-600 dark:text-gray-400">Don't have an account? <a href="#" class="text-blue-600 dark:text-blue-400 hover:underline">Sign up</a></p>
    </div>
 </div>

<div class="min-h-screen flex items-center justify-center bg-gray-100 dark:bg-gray-900 p-4">
    <div class="bg-white dark:bg-gray-800 rounded-lg shadow-md p-8 w-full max-w-sm mt-8">
        <h2 class="text-2xl font-semibold text-center text-gray-800 dark:text-gray-200">Create Account</h2>
        <p class="text-gray-600 dark:text-gray-400 text-center mb-6">Join us today</p>
        <form>
            <div class="mb-4">
                <label class="block text-gray-700 dark:text-gray-300" for="username">Username</label>
                <input type="text" id="username" name="username" class="w-full p-2 border rounded-lg border-gray-300 dark:border-gray-600 bg-gray-50 dark:bg-gray-700 text-gray-800 dark:text-gray-200 focus:outline-none focus:border-blue-500 dark:focus:border-blue-400" required>
            </div>
            <div class="mb-4">
                <label class="block text-gray-700 dark:text-gray-300" for="email">Email</label>
                <input type="email" id="email" name="email" class="w-full p-2 border rounded-lg border-gray-300 dark:border-gray-600 bg-gray-50 dark:bg-gray-700 text-gray-800 dark:text-gray-200 focus:outline-none focus:border-blue-500 dark:focus:border-blue-400" required>
            </div>
            <div class="mb-6">
                <label class="block text-gray-700 dark:text-gray-300" for="password">Password</label>
                <input type="password" id="password" name="password" class="w-full p-2 border rounded-lg border-gray-300 dark:border-gray-600 bg-gray-50 dark:bg-gray-700 text-gray-800 dark:text-gray-200 focus:outline-none focus:border-blue-500 dark:focus:border-blue-400" required>
            </div>
            <button type="submit" class="w-full py-2 bg-blue-600 text-white rounded-lg hover:bg-blue-700 dark:bg-blue-500 dark:hover:bg-blue-400 transition duration-150">Sign Up</button>
        </form>
        <p class="mt-4 text-center text-gray-600 dark:text-gray-400">Already have an account? <a href="#" class="text-blue-600 dark:text-blue-400 hover:underline">Login</a></p>
    </div>
</div>