.float {
  position: fixed;
  width: 60px;
  height: 60px;
  bottom: 70px;
  right: 40px;
  background-color: #25d366;
  color: #fff;
  border-radius: 50px;
  text-align: center;
  font-size: 30px;
  box-shadow: 2px 2px 3px #999;
  z-index: 100;
  transition: all 0.3s ease-in-out;
}
.my-float {
  margin-top: 16px;
}
.float:hover {
  background-color: #128C7E;
  transform: scale(1.1);
}
@media (max-width: 767px) {
  .float {
    width: 50px;
    height: 50px;
    bottom: 70px;
    right: 20px;
    font-size: 25px;
  }
  .my-float {
    margin-top: 12px;
  }
}