Pulse Ring

.btn-pulse-ring {
  display: inline-block;
  padding: 12px 26px;
  border: none;
  border-radius: 999px;
  background: #6366f1;
  color: #ffffff;
  font-family: inherit;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
.btn-pulse-ring:hover {
  animation: btn-pulse-ring-wave 1s ease-out infinite;
}
@keyframes btn-pulse-ring-wave {
  0% {
    box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.7);
  }
  100% {
    box-shadow: 0 0 0 16px rgba(99, 102, 241, 0);
  }
}