body {
    background-color: #2980b9;
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
  }
  
  .login-container {
    width: 320px;
    margin: 100px auto;
    background: #fff;
    padding: 25px;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
  }
  
  .login-container h2 {
    text-align: center;
    margin-bottom: 20px;
  }
  
  .input-group {
    margin-bottom: 15px;
  }
  
  .input-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
  }
  
  .input-group input {
    width: 100%;
    padding: 8px;
    box-sizing: border-box;
  }
  
  button {
    width: 100%;
    padding: 10px;
    background-color: #3498db;
    color: #fff;
    border: none;
    cursor: pointer;
    border-radius: 3px;
    font-size: 16px;
  }
  
  button:hover {
    background-color: #2980b9;
  }
  
  #error {
    margin-bottom: 15px;
    color: red;
    text-align: center;
  }