ログインフォームサンプル

<div class="login">
  <h2>ログイン</h2>
  <form>
    <div class="form-group">
      <label for="email" class="form-label">メールアドレス</label>
      <input type="email" id="email" class="form-control" placeholder="your@email.com" required>
    </div>
    <div class="form-group">
      <label for="password" class="form-label">パスワード</label>
      <input type="password" id="password" class="form-control" placeholder="パスワードを入力" required>
    </div>
    <div class="form-check">
      <input type="checkbox" id="remember" class="form-check-input">
      <label for="remember" class="form-check-label">ログイン状態を保持する</label>
    </div>
    <button type="submit" class="btn-login">ログイン</button>
    <div class="forgot-password">
      <a href="#">パスワードを忘れた方はこちら</a>
    </div>
  </form>
</div>

/* ログインフォームのスタイル */
.login {
  max-width: 400px;
  margin: 0 auto;
  padding: 2rem;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.login h2 {
  text-align: center;
  margin-bottom: 2rem;
  color: #333;
  font-weight: 600;
}

.login .form-group {
  margin-bottom: 1.5rem;
}

.login .form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: #555;
}

.login .form-control {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid #e1e5e9;
  border-radius: 8px;
  font-size: 16px;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  background-color: #fff;
  box-sizing: border-box;
}

.login .form-control:focus {
  outline: none;
  border-color: #ff6b6b;
  box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.1);
}

.login .btn-login {
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, #ff6b6b, #ff8e8e);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.login .btn-login:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 107, 107, 0.3);
}

.login .form-check {
  display: flex;
  align-items: center;
  margin-bottom: 1.5rem;
}

.login .form-check-input {
  margin-right: 0.5rem;
}

.login .form-check-label {
  font-size: 14px;
  color: #666;
}

.login .forgot-password {
  text-align: center;
  margin-top: 1rem;
}

.login .forgot-password a {
  color: #ff6b6b;
  text-decoration: none;
  font-size: 14px;
}

.login .forgot-password a:hover {
  text-decoration: underline;
}