.whatsapp-float {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #22c55e;
  color: white;
  font-size: 24px;
  padding: 15px;
  border-radius: 50%;
  text-decoration: none;
  box-shadow: 0 10px 20px rgba(0,0,0,0.3);
  z-index: 999;
}

.whatsapp-float:hover {
  transform: scale(1.1);
}