/* Full-screen overlay for loading bar */
  #loading-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5); /* Semi-transparent background */
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999; /* Ensure it appears above all other content */
  }

  /* Spinner animation */
  .loading-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #f3f3f3; /* Light grey */
    border-top: 5px solid #3498db; /* Blue */
    border-radius: 50%;
    animation: spin 1s linear infinite;
  }

  /* Keyframes for spin animation */
  @keyframes spin {
    0% {
      transform: rotate(0deg);
    }
    100% {
      transform: rotate(360deg);
    }
  }