/* Preloader styles */
    #preloader {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-color: #ffffff; /* Background color of the preloader */
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 9999;
      transition: opacity 0.5s ease, visibility 0.5s ease;
    }
    
    #preloader.hidden {
      opacity: 0;
      visibility: hidden;
    }

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

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