.repl-icon { width: 20px; height: 18px; animation: glowPulse 4s infinite ease-in-out; } .repl-icon-large { width: 36px; height: 36px; animation: glowPulse-large 2s infinite ease-in-out; } .repl-icon-large-text { height: 36px; animation: glowPulse-large 2s infinite ease-in-out; } @keyframes glowPulse { 0% { filter: drop-shadow(0 0 2px #ff1a1a); } 20% { filter: drop-shadow(0 0 8px #ff4d4d); } 80% { filter: drop-shadow(0 0 8px #ff0000); } 100% { filter: drop-shadow(0 0 2px #ff1a1a); } } @keyframes glowPulse-large { 0% { filter: drop-shadow(0 0 4px #ff1a1a); } 50% { filter: drop-shadow(0 0 20px #ff4d4d); } 100% { filter: drop-shadow(0 0 8px #ff1a1a); } }