    /* Basic styling */

      /* Popup styling */
      .popup {
        display: none; /* Hidden by default */
        position: fixed;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 330px;
        padding: 20px;
        background-color: white;
        box-shadow: 0px 4px 8px rgba(0, 0, 0, 0.2);
        border-radius: 8px;
        text-align: center;
        z-index: 9999;
      }
  
      .popup h2 {
        margin-top: 0;
      }
  
      /* Close button styling */
      .popup .close-btn {
        margin-top: 10px;
        padding: 8px 16px;
        background-color: #333;
        color: white;
        border: none;
        border-radius: 5px;
        cursor: pointer;
      }
  
      .overlay {
        display: none; /* Hidden by default */
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5); /* Semi-transparent dark overlay */
        z-index: 1; /* Position it below the popup */
      }
  