.whatsapp {
    position: fixed;
    width: 60px;
    height: 60px;
    bottom: 40px;
    right: 40px;
    background-color: #25d366;
    color: #fff;
    border-radius: 50px;
    text-align: center;
    font-size: 30px;
    z-index: 100;
}
  
.whatsapp-icon {
  margin-top:14.5px;
}

@media only screen and (width <= 767px) {
  .whatsapp {
    right: 10px;
    bottom: 10px;
  }
}