  <style>
    body {
      font-family: sans-serif;
      padding: 20px;
      max-width: 600px;
      margin: auto;
    }
    textarea {
      width: 100%;
      height: 600px;
      margin-bottom: 10px;
    }
    button, input[type="file"] {
      margin-right: 10px;
      padding: 10px;
    }
  </style>