.pulse-button {
  position: relative;
  z-index: 1;
  overflow: hidden;
}

.pulse-button::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 200%;
  height: 200%;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  transform: translate(-50%, -50%) scale(0);
  animation: pulse 2s infinite;
  z-index: -1;
}

@keyframes pulse {
  0% {
    transform: translate(-50%, -50%) scale(0);
    opacity: 1;
  }
  100% {
    transform: translate(-50%, -50%) scale(1);
    opacity: 0;
  }
}