.btn-whatsapp {
       display:block;
       width:70px;
     
       color:#fff;
       position: fixed;
       right:20px;
       bottom:20px;
       border-radius:50%;
       line-height:80px;
       text-align:center;
       z-index:999;
       max-width: 50px;
  height: auto;
}
a:hover {
  filter: blur(1px);
}