body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
  }
  
  .container {
    text-align: center;
  }
  
  textarea {
    width: 100%;
    height: 100px;
    margin-bottom: 10px;
  }
  
  button {
    padding: 10px;
    background-color: #4caf50;
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 16px;
  }
  
  .barcode-scanner {
    margin-top: 20px;
  }