body {
    font-family: Arial, sans-serif;
    padding: 20px;
    background: #111;
    color: #fff;
  }
  
  button {
    padding: 10px 20px;
    cursor: pointer;
    background: #4caf50;
    border: none;
    border-radius: 6px;
    color: white;
  }
  
  pre {
    margin-top: 20px;
    background: #222;
    padding: 15px;
    border-radius: 8px;
    white-space: pre-wrap;
  }