body { background-color: #f5f5f5; color: #222; }
    a:hover { color: #FFD700; }

    /* Smooth slide animation for mobile dropdown */
    #mobileDropdownMenu {
      transition: max-height 0.3s ease, opacity 0.3s ease;
      overflow: hidden;
      max-height: 0;
      opacity: 0;
    }
    #mobileDropdownMenu.open {
      max-height: 300px;
      opacity: 1;
    }
    
    /* ✅ Scroll-to-top button */
    #scrollTopBtn {
      position: fixed;
      bottom: 1.5rem;
      right: 1.5rem;
      display: none;
      z-index: 50;
    }