body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 1rem;
    transition: background 0.5s, color 0.5s;
  }
  .container {
    max-width: 800px;
    margin: auto;
  }
  textarea {
    width: 100%;
    height: 60px;
    margin-top: 10px;
  }
  .light {
    background: #ffffff;
    color: #000000;
  }
  .dark {
    
    color: #ffffff;
  }
  button {
    margin-right: 10px;
  }