.whatsapp-button {
  position: fixed;
  bottom: 20px;
  left: 20px;
  z-index: 1000;
}

.whatsapp-button img {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}