/* 登录页面整体布局 */
.login-container {
  max-width: 420px;
  margin: 80px auto;
  padding: 40px 30px;
  background: #ffffff;
  border: 1px solid #e5e5e5;
  box-sizing: border-box;
}

.login-container h2 {
  font-size: 22px;
  font-weight: 500;
  text-align: center;
  margin-bottom: 30px;
  color: #000;
  letter-spacing: 0.5px;
}

/* 表单组 */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  margin-bottom: 8px;
  color: #222;
  font-weight: 400;
}

.form-group input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #ddd;
  font-size: 15px;
  background-color: #f9f9f9;
  outline: none;
  box-sizing: border-box;
}

.form-group input:focus {
  border-color: #000;
  background-color: #fff;
}

/* 登录按钮 */
.login-btn {
  width: 100%;
  padding: 14px;
  background-color: #000;
  color: #fff;
  border: none;
  font-size: 15px;
  cursor: pointer;
  margin-top: 10px;
  transition: background 0.2s ease;
}

.login-btn:hover {
  background-color: #333;
}

/* 错误提示 */
.error-message {
  color: #d32f2f;
  font-size: 13px;
  text-align: center;
  margin-bottom: 15px;
  min-height: 18px;
}

/* 注册链接 */
.register-link {
  text-align: center;
  margin-top: 25px;
  font-size: 14px;
  color: #555;
}

.register-link a {
  color: #000;
  text-decoration: none;
  font-weight: 500;
}

.register-link a:hover {
  text-decoration: underline;
}

/* 响应式适配手机 */
@media (max-width: 576px) {
  .login-container {
    margin: 40px 20px;
    padding: 30px 20px;
  }
}