.whatsapp-float {
  position: fixed;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 9999;
  background-color: #25d366;
  padding: 10px;
  border-radius: 50%;
  box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}
.whatsapp-float img {
  display: block;
}