body { background-color: #f3f4f6; color: #1f2937; }
        
        .page-section { display: none; animation: fadeIn 0.3s ease-out; }
        .page-section.active { display: block; }
        
        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }

        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
        }

        .gallery-item {
            position: relative;
            height: 350px;
            overflow: hidden;
            cursor: pointer;
            border-radius: 0.75rem;
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        }

        .gallery-item img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        .gallery-item:hover img { transform: scale(1.15); }

        .gallery-item .overlay {
            position: absolute;
            bottom: -100%;
            left: 0;
            width: 100%;
            padding: 2rem 1.5rem;
            background: linear-gradient(to top, rgba(0,0,0,0.9), rgba(0,0,0,0));
            color: white;
            transition: bottom 0.4s ease;
            text-align: left;
        }

        .gallery-item:hover .overlay { bottom: 0; }
        .gallery-item span { font-weight: 800; font-size: 1.25rem; letter-spacing: 1px; }

        /* Custom Scrollbar */
        ::-webkit-scrollbar { width: 8px; }
        ::-webkit-scrollbar-track { background: #f1f1f1; }
        ::-webkit-scrollbar-thumb { background: #10b981; border-radius: 4px; }
        ::-webkit-scrollbar-thumb:hover { background: #059669; }

        #toast {
            visibility: hidden;
            min-width: 250px;
            background-color: #ef4444;
            color: #fff;
            text-align: center;
            border-radius: 8px;
            padding: 16px;
            position: fixed;
            z-index: 100;
            left: 50%;
            bottom: 30px;
            transform: translateX(-50%);
            font-size: 15px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            opacity: 0;
            transition: opacity 0.3s, bottom 0.3s;
        }
        #toast.show { visibility: visible; opacity: 1; bottom: 50px; }
        #toast.success { background-color: #10b981; }