.pulsing-button{box-shadow:0 0 0 0 rgba(57,175,209,.7);animation:pulsing 1.25s cubic-bezier(.66,0,0,1) infinite;transition:all .3s ease-in-out}.pulsing-button:hover{animation:step-end}@keyframes pulsing{to{box-shadow:0 0 0 30px rgba(57,175,209,0)}}