@keyframes breathe {
            0%, 100% { box-shadow: 0 0 20px rgba(59, 130, 246, 0.3); }
            50% { box-shadow: 0 0 40px rgba(59, 130, 246, 0.6); }
        }
        .img-breathe { animation: breathe 3s infinite ease-in-out; }