@keyframes breathe {
            0%, 100% { transform: scale(1); box-shadow: 0 10px 25px -5px rgba(59, 130, 246, 0.3); }
            50% { transform: scale(1.02); box-shadow: 0 20px 35px -5px rgba(59, 130, 246, 0.5); }
        }
        .animate-breathe { animation: breathe 4s infinite ease-in-out; }