.whatsapp {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 1000;
  width: 60px;
  height: 60px;
}

.whatsapp img {
  width: 100%;
  height: auto;
  border-radius: 50%;
  box-shadow: 0 2px 5px rgba(0,0,0,0.3);
  transition: transform 0.2s;
}

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