.whatsapp {
  position:fixed;
  width:43px;
  height:43px;
  bottom:160px;
  right:20px;
  background-color:#25d366;
  color:#FFF;
  border-radius:40px;
  text-align:center;
  font-size:25px;
  z-index:100;
}

.whatsapp-icon {
  margin-top:5px;
}