/* Styling for the loading spinner container */
 #loadingSpinnerContainer {
    display: none;
    align-items: center;
    justify-content: center;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5); /* Semi-transparent black background */
  }

  /* Styling for the loading spinner */
  #loadingSpinner {
    border: 8px solid #f3f3f3;
    border-top: 8px solid #3498db;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
  }

  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }

  /* Styling for the loading bar popup */
  #loadingPopup {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 20px;
    background-color: #fff;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
  }

  #loadingBar {
    height: 20px;
    background-color: #ddd;
    border-radius: 4px;
    margin-bottom: 10px;
  }

  /* Styling for the QR code card */
  #qrCodeCard {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    padding: 10px;
    background-color: #fff;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
  }

  #qrCodeContainer img {
    width: 100%;
    height: auto;
    display: block;
  }

  #scanText {
    text-align: center;
    margin-top: 10px;
    color: #333;
  }

  /* Styling for the success popup */
  #popupContainer {
    display: none;
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 15px;
    background-color: #28a745;
    color: #fff;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
  }