.pulse-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  background-color: limegreen;
  border-radius: 50%;
  box-shadow: 0 0 0 rgba(0, 255, 0, 0.4);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(0, 255, 0, 0.7);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(0, 255, 0, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(0, 255, 0, 0);
  }
}