@keyframes breathe {
            0%, 100% { box-shadow: 0 0 20px rgba(59, 130, 246, 0.2); }
            50% { box-shadow: 0 0 40px rgba(59, 130, 246, 0.5); }
        }
        .img-breathe { animation: breathe 3s infinite ease-in-out; }
        .video-shadow { filter: drop-shadow(0 20px 30px rgba(0,0,0,0.15)); }