/* 全局样式 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #47c1f2, #c152fd);
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* 登录容器 */
.login-container {
  background: #ffffff;
  padding: 50px 35px;
  border-radius: 15px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  width: 320px;
  text-align: center;
  transition: transform 0.2s;
}

.login-container:hover {
  transform: translateY(-3px);
}

.login-container h1 {
  margin-bottom: 25px;
  font-size: 26px;
  color: #333;
}

/* 输入框 */
.login-container input {
  width: 100%;
  padding: 12px 15px;
  margin-bottom: 20px;
  font-size: 16px;
  border-radius: 8px;
  border: 1px solid #ccc;
  outline: none;
  transition: border 0.2s;
}

.login-container input:focus {
  border-color: #4e54c8;
  box-shadow: 0 0 5px rgba(78, 84, 200, 0.4);
}

/* 登录按钮 */
.login-container button {
  width: 100%;
  padding: 12px 0;
  font-size: 16px;
  background-color: #4e54c8;
  color: white;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: background 0.2s;
}

.login-container button:hover {
  background-color: #3b40a0;
}

/* 错误提示 */
.error {
  color: #e74c3c;
  font-size: 14px;
  margin-top: 10px;
  min-height: 18px;
}