@keyframes pulsate-glow { 0% { box-shadow: 0 0 5px 2px rgba(0, 255, 255, 0.5); } 50% { box-shadow: 0 0 15px 5px rgba(0, 255, 255, 0.8); } 100% { box-shadow: 0 0 5px 2px rgba(0, 255, 255, 0.5); } } .glow-effect { animation: pulsate-glow 1s infinite;  transition: box-shadow 0.3s ease-in-out; }