.boton-whatsapp {
  position: fixed;
  bottom: 90px;
  right: 20px;
  z-index: 9999;
  width: 50px;
  height: 50px;
  cursor: pointer;
}

.boton-whatsapp img {
  width: 100%;
  height: auto;
  border-radius: 50%;
  box-shadow: 0 4px 8px rgba(0,0,0,0.3);
  transition: transform 0.3s ease;
}

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