.whatsapp-float {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 1000;
  animation: blink 1.5s infinite;
}

@keyframes blink {
  0%, 100% {
    filter: brightness(1);
  }
  50% {
    filter: brightness(1.6);
  }
}