.product-shadow {
            filter: drop-shadow(0 20px 25px rgba(0, 0, 0, 0.15)) drop-shadow(0 10px 10px rgba(0, 0, 0, 0.1));
            animation: breathe 4s infinite ease-in-out;
        }
        @keyframes breathe {
            0% { transform: scale(1); }
            50% { transform: scale(1.02); }
            100% { transform: scale(1); }
        }