認証コンポーネント

                <div class="min-h-screen bg-gradient-to-br from-gray-200 to-gray-400 dark:from-gray-800 dark:to-gray-900 py-12 px-4 sm:px-6 lg:px-8 flex flex-col justify-center">
  <div class="sm:mx-auto sm:w-full sm:max-w-md">
    <div class="bg-white dark:bg-gray-700 py-8 px-4 shadow-xl rounded-3xl sm:rounded-br-none sm:rounded-tl-none sm:px-10 border-t-4 border-b-4 border-gray-300 dark:border-gray-600">
      <div class="sm:mx-auto sm:w-full sm:max-w-md text-center">
        <svg class="mx-auto h-12 w-12 text-gray-600 dark:text-gray-300" fill="none" viewBox="0 0 24 24" stroke="currentColor">
          <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 15v2m-6 4h12a2 2 0 002-2v-6a2 2 0 00-2-2H6a2 2 0 00-2 2v6a2 2 0 002 2zm10-10V7a4 4 0 00-8 0v4h8z" />
        </svg>
        <h2 class="mt-6 text-center text-3xl font-extrabold text-gray-900 dark:text-white">
          Sign in to your account
        </h2>
      </div>

      <form class="mt-8 space-y-6" action="#" method="POST">
        <input type="hidden" name="remember" value="true">
        <div class="rounded-md shadow-sm -space-y-px">
          <div>
            <label for="email-address" class="sr-only">Email address</label>
            <input id="email-address" name="email" type="email" autocomplete="email" required class="appearance-none rounded-none relative block w-full px-3 py-2 border border-gray-300 placeholder-gray-500 text-gray-900 rounded-t-md focus:outline-none focus:ring-indigo-500 focus:border-indigo-500 focus:z-10 sm:text-sm dark:bg-gray-600 dark:border-gray-500 dark:placeholder-gray-400 dark:text-white" placeholder="Email address">
          </div>
          <div>
            <label for="password" class="sr-only">Password</label>
            <input id="password" name="password" type="password" autocomplete="current-password" required class="appearance-none rounded-none relative block w-full px-3 py-2 border border-gray-300 placeholder-gray-500 text-gray-900 rounded-b-md focus:outline-none focus:ring-indigo-500 focus:border-indigo-500 focus:z-10 sm:text-sm dark:bg-gray-600 dark:border-gray-500 dark:placeholder-gray-400 dark:text-white" placeholder="Password">
          </div>
        </div>

        <div class="flex items-center justify-between">
          <div class="flex items-center">
            <input id="remember-me" name="remember-me" type="checkbox" class="h-4 w-4 text-indigo-600 focus:ring-indigo-500 border-gray-300 rounded dark:bg-gray-500 dark:border-gray-400">
            <label for="remember-me" class="ml-2 block text-sm text-gray-900 dark:text-gray-200">
              Remember me
            </label>
          </div>

          <div class="text-sm">
            <a href="#" class="font-medium text-indigo-600 hover:text-indigo-500 dark:text-indigo-400 dark:hover:text-indigo-300">
              Forgot your password?
            </a>
          </div>
        </div>

        <div>
          <button type="submit" class="group relative w-full flex justify-center py-2 px-4 border border-transparent text-sm font-medium rounded-md text-white bg-gradient-to-r from-indigo-600 to-indigo-700 hover:from-indigo-700 hover:to-indigo-800 focus:outline-none focus:ring-2 focus:ring- offsetting-2 focus:ring-indigo-500 shadow-lg transform transition duration-300 ease-in-out hover:scale-105">
            <span class="absolute left-0 inset-y-0 flex items-center pl-3">
              <svg class="h-5 w-5 text-indigo-500 group-hover:text-indigo-400" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor" aria-hidden="true">
                <path fill-rule="evenodd" d="M5 9V7a5 5 0 0110 0v2h1a2 2 0 012 2v5a2 2 0 01-2 2H4a2 2 0 01-2-2v-5a2 2 0 012-2h1zm5-3a1 1 0 011 1v3a1 1 0 11-2 0V7a1 1 0 011-1z" clip-rule="evenodd" />
              </svg>
            </span>
            Sign in
          </button>
        </div>
      </form>
    </div>
  </div>
</div>
              

                <div class="flex items-center justify-center min-h-screen bg-gray-100 dark:bg-gray-900">
    <div class="max-w-md w-full bg-white dark:bg-gray-800 shadow-lg rounded-lg p-8">
        <h2 class="text-2xl font-bold text-gray-800 dark:text-white text-center mb-6">Welcome Back</h2>
        <form>
            <div class="mb-4">
                <label class="block text-gray-700 dark:text-gray-300 font-semibold mb-2" for="email">Email</label>
                <input class="shadow appearance-none border rounded w-full py-2 px-3 text-gray-700 dark:text-gray-300 leading-tight focus:outline-none focus:shadow-outline dark:bg-gray-700" id="email" type="email" placeholder="[email protected]">
            </div>
            <div class="mb-6">
                <label class="block text-gray-700 dark:text-gray-300 font-semibold mb-2" for="password">Password</label>
                <input class="shadow appearance-none border rounded w-full py-2 px-3 text-gray-700 dark:text-gray-300 leading-tight focus:outline-none focus:shadow-outline dark:bg-gray-700" id="password" type="password" placeholder="********">
            </div>
            <div class="flex items-center justify-between mb-4">
                <div class="flex items-center">
                    <input type="checkbox" class="form-checkbox h-4 w-4 text-gray-600 dark:text-gray-400">
                    <label class="ml-2 block text-gray-700 dark:text-gray-300">Remember Me</label>
                </div>
                <a href="#" class="text-sm text-blue-600 dark:text-blue-400 hover:underline">Forgot Password?</a>
            </div>
            <div>
                <button class="w-full bg-blue-600 hover:bg-blue-700 text-white font-bold py-2 px-4 rounded focus:outline-none focus:shadow-outline">Login</button>
            </div>
        </form>
        <div class="mt-6 text-center">
            <p class="text-sm 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 class="mt-6 text-center border-t pt-4">
            <p class="text-gray-600 dark:text-gray-400 text-sm">or login with</p>
            <div class="flex justify-center mt-2">
                <img class="h-8 w-8 rounded-full mx-2" src="https://picsum.photos/200/200" alt="Random user avatar">
                <img class="h-8 w-8 rounded-full mx-2" src="https://picsum.photos/200/201" alt="Random user avatar">
                <img class="h-8 w-8 rounded-full mx-2" src="https://picsum.photos/200/202" alt="Random user avatar">
            </div>
        </div>
    </div>
</div>
              

                <div class="flex items-center justify-center min-h-screen bg-gray-900 text-white">
    <div class="w-full max-w-sm">
        <div class="mb-6 text-center">
            <h1 class="text-2xl font-bold">Authentication</h1>
            <p class="text-gray-400">Please sign in or create an account</p>
        </div>
        <div class="bg-gray-800 rounded-lg shadow-lg p-6">
            <form>
                <div class="mb-4">
                    <label for="email" class="block mb-2 text-sm font-medium">Email</label>
                    <input type="email" id="email" placeholder="[email protected]" class="w-full px-3 py-2 text-gray-900 bg-gray-200 rounded focus:outline-none focus:ring focus:ring-blue-500" required>
                </div>
                <div class="mb-4">
                    <label for="password" class="block mb-2 text-sm font-medium">Password</label>
                    <input type="password" id="password" placeholder="********" class="w-full px-3 py-2 text-gray-900 bg-gray-200 rounded focus:outline-none focus:ring focus:ring-blue-500" required>
                </div>
                <div class="flex items-center justify-between mb-6">
                    <div>
                        <input type="checkbox" id="remember" class="w-4 h-4 text-blue-600 border-gray-300 rounded focus:ring-blue-500">
                        <label for="remember" class="ml-2 text-sm">Remember me</label>
                    </div>
                    <a href="#" class="text-sm text-blue-500 hover:underline">Forgot password?</a>
                </div>
                <button type="submit" class="w-full py-2 mt-2 text-white bg-blue-600 rounded hover:bg-blue-700 focus:outline-none focus:ring focus:ring-blue-500">Sign In</button>
            </form>
            <div class="mt-4 text-center">
                <p class="text-gray-400">or</p>
                <button class="w-full py-2 mt-2 text-white bg-gray-700 rounded hover:bg-gray-600 focus:outline-none">Sign Up</button>
            </div>
        </div>
        <div class="mt-6 text-center">
            <img src="https://picsum.photos/100/100" alt="Random placeholder" class="rounded-full mx-auto mb-2">
            <p class="text-gray-400 text-sm">Random User Avatar</p>
        </div>
    </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">
        <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>

              

                <div class="min-h-screen flex items-center justify-center bg-gray-900 text-white">
  <div class="bg-gray-800 rounded-lg shadow-lg p-8 w-96">
    <h2 class="text-2xl font-bold mb-6 text-center">Welcome Back!</h2>
    <form>
      <div class="mb-4">
        <label class="block text-sm font-semibold mb-2" for="email">Email</label>
        <input type="email" id="email" class="w-full p-2 bg-gray-700 text-white rounded focus:outline-none focus:ring-2 focus:ring-indigo-500" placeholder="[email protected]" required />
      </div>
      <div class="mb-4">
        <label class="block text-sm font-semibold mb-2" for="password">Password</label>
        <input type="password" id="password" class="w-full p-2 bg-gray-700 text-white rounded focus:outline-none focus:ring-2 focus:ring-indigo-500" placeholder="********" required />
      </div>
      <button type="submit" class="w-full bg-indigo-600 hover:bg-indigo-500 text-white font-semibold py-2 rounded focus:outline-none focus:ring-2 focus:ring-indigo-500 transition duration-300">Login</button>
    </form>
    <div class="mt-4 text-center">
      <a href="#" class="text-sm text-indigo-400 hover:underline">Forgot your password?</a>
    </div>
    <div class="mt-6 border-t border-gray-600"></div>
    <h2 class="text-2xl font-bold mt-6 text-center">Create an Account</h2>
    <form>
      <div class="mb-4">
        <label class="block text-sm font-semibold mb-2" for="new-email">Email</label>
        <input type="email" id="new-email" class="w-full p-2 bg-gray-700 text-white rounded focus:outline-none focus:ring-2 focus:ring-indigo-500" placeholder="[email protected]" required />
      </div>
      <div class="mb-4">
        <label class="block text-sm font-semibold mb-2" for="new-password">Password</label>
        <input type="password" id="new-password" class="w-full p-2 bg-gray-700 text-white rounded focus:outline-none focus:ring-2 focus:ring-indigo-500" placeholder="********" required />
      </div>
      <div class="mb-4">
        <label class="block text-sm font-semibold mb-2" for="avatar">Upload Avatar</label>
        <input type="file" id="avatar" class="block w-full text-sm text-gray-500 bg-gray-600 rounded focus:outline-none" />
      </div>
      <button type="submit" class="w-full bg-indigo-600 hover:bg-indigo-500 text-white font-semibold py-2 rounded focus:outline-none focus:ring-2 focus:ring-indigo-500 transition duration-300">Sign Up</button>
    </form>
    <div class="mt-4 text-center">
      <small>Or sign up using</small>
      <div class="flex justify-center mt-2">
        <img src="https://picsum.photos/30/30" class="rounded-full mx-1" alt="Random Avatar" />
        <img src="https://picsum.photos/30/30" class="rounded-full mx-1" alt="Random Avatar" />
        <img src="https://picsum.photos/30/30" class="rounded-full mx-1" alt="Random Avatar" />
      </div>
    </div>
  </div>
</div>
              

                <div class="min-h-screen flex items-center justify-center bg-gray-900 p-4">
    <div class="bg-gray-800 rounded-lg shadow-lg p-6 max-w-sm w-full">
        <h2 class="text-white text-2xl mb-6 text-center">Welcome Back</h2>
        <form>
            <div class="mb-4">
                <label class="block text-gray-300 mb-2" for="email">Email</label>
                <input class="w-full px-4 py-2 rounded bg-gray-700 text-white focus:outline-none focus:ring focus:ring-indigo-500" type="email" id="email" placeholder="[email protected]" required>
            </div>
            <div class="mb-6">
                <label class="block text-gray-300 mb-2" for="password">Password</label>
                <input class="w-full px-4 py-2 rounded bg-gray-700 text-white focus:outline-none focus:ring focus:ring-indigo-500" type="password" id="password" placeholder="********" required>
            </div>
            <button class="w-full bg-indigo-600 hover:bg-indigo-500 text-white font-bold py-2 rounded focus:outline-none focus:ring focus:ring-indigo-400 transition duration-200">Login</button>
        </form>
        <div class="mt-4 text-center">
            <span class="text-gray-400">or</span>
        </div>
        <div class="mt-4">
            <p class="text-gray-400 text-center">Don't have an account? <a href="#" class="text-indigo-400 hover:underline">Sign up</a></p>
        </div>
    </div>
</div>

<div class="min-h-screen flex items-center justify-center bg-gray-900 p-4 mt-10">
    <div class="bg-gray-800 rounded-lg shadow-lg p-6 max-w-sm w-full">
        <h2 class="text-white text-2xl mb-6 text-center">Create Account</h2>
        <form>
            <div class="mb-4">
                <label class="block text-gray-300 mb-2" for="name">Name</label>
                <input class="w-full px-4 py-2 rounded bg-gray-700 text-white focus:outline-none focus:ring focus:ring-indigo-500" type="text" id="name" placeholder="John Doe" required>
            </div>
            <div class="mb-4">
                <label class="block text-gray-300 mb-2" for="email-signup">Email</label>
                <input class="w-full px-4 py-2 rounded bg-gray-700 text-white focus:outline-none focus:ring focus:ring-indigo-500" type="email" id="email-signup" placeholder="[email protected]" required>
            </div>
            <div class="mb-6">
                <label class="block text-gray-300 mb-2" for="password-signup">Password</label>
                <input class="w-full px-4 py-2 rounded bg-gray-700 text-white focus:outline-none focus:ring focus:ring-indigo-500" type="password" id="password-signup" placeholder="********" required>
            </div>
            <button class="w-full bg-indigo-600 hover:bg-indigo-500 text-white font-bold py-2 rounded focus:outline-none focus:ring focus:ring-indigo-400 transition duration-200">Sign Up</button>
        </form>
        <div class="mt-4 text-center">
            <span class="text-gray-400">or</span>
        </div>
        <div class="mt-4">
            <p class="text-gray-400 text-center">Already have an account? <a href="#" class="text-indigo-400 hover:underline">Login</a></p>
        </div>
    </div>
</div>