@keyframes glow{0%{box-shadow:0 0 0 transparent}to{box-shadow:0 0 10px rgba(0,0,0,.3),0 0 15px rgba(0,0,0,.2),0 0 25px rgba(0,0,0,.1),0 0 35px var(--glow-color)}}.glow{animation:glow 1s ease-in-out forwards;will-change:box-shadow}