.mobile-nav {
            display: none;
            position: fixed;
            bottom: 0;
            width: 100%;
            background: #333;
            z-index: 100;
        }
        .mobile-nav-container {
            display: flex;
            justify-content: space-around;
            padding: 10px 0;
        }
        .mobile-nav-item {
            color: white;
            text-decoration: none;
            text-align: center;
            font-size: 12px;
        }
        
         @media (max-width: 768px) {
            .left-sidebar { display: none; }
            .right-content { width: 100%; }

            .mobile-nav { display: block; }
        }