.whatsapp-float {
  position: fixed;
  width: 60px;
  height: 60px;
  bottom: 40px;
  right: 40px;
  background-color: #25d366;
  color: #FFF;
  border-radius: 50px;
  text-align: center;
  font-size: 32px;
  box-shadow: 2px 2px 3px #999;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.whatsapp-float:hover {
  background-color: #128c7e;
  transform: scale(1.1);
  box-shadow: 2px 2px 10px #666;
  color: #FFF;
}

.whatsapp-float i {
  line-height: 1;
}

@media screen and (max-width: 768px) {
  .whatsapp-float {
    width: 50px;
    height: 50px;
    bottom: 20px;
    right: 20px;
    font-size: 25px;
  }
}