/* Responsive Design */
@media (max-width: 1024px) {
    .portfolio-navigation-layout {
        grid-template-areas:
            "top-thumbs"
            "main-content"
            "left-thumbs"
            "right-thumbs"
            "bottom-thumbs";
        grid-template-columns: 1fr;
    }
    
    .thumbnail-left,
    .thumbnail-right {
        writing-mode: horizontal-tb;
    }
}

@media (max-width: 768px) {
    .thumbnail-grid {
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
        gap: 0.5rem;
        padding: 0.5rem;
    }
    
    .main-content-area {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .thumbnail-grid {
        grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
    }
}