img.btn-whatsapp {
    display: block !important;
    position: fixed;
    z-index: 9999999;
    bottom: 90px;
    right: 19px;
    cursor: pointer;
    border-radius:100px !important;
    transition-duration: 0.3s;
    transition-timing-function: ease-in-out;
    transform: scale(0);
    width: 60px; 
    height: auto;
  }

  img.btn-whatsapp.visible {
    transform: scale(1);
  }

  img.btn-whatsapp:hover{
    border-radius:100px !important;
    -webkit-box-shadow: 0px 0px 15px 0px rgba(7,94,84,1); 
    -moz-box-shadow: 0px 0px 15px 0px rgba(7,94,84,1);
    box-shadow: 0px 0px 15px 0px rgba(7,94,84,1);
    transition-duration: 0.3s;
    transition-timing-function: ease-in-out;
  }