@keyframes pink-heartbeat { 0% { opacity: 0.7; filter: brightness(1) blur(0.5px); transform: scale(1); } 30% { opacity: 1; filter: brightness(1.1) blur(2px); transform: scale(1.05); } 50% { opacity: 0.8; filter: brightness(1.2) blur(3px); transform: scale(1.1); } 70% { opacity: 1; filter: brightness(1.1) blur(2px); transform: scale(1.05); } 100% { opacity: 0.7; filter: brightness(1) blur(0.5px); transform: scale(1); } }