.base-whatsapp{
    background:#fff;
    display:block;
    position:fixed;
    right:0;
    /*top:140px;
    top:calc(50% - 75px);*/
    top:140px;
    width:72px;
    height:150px;
    z-index:999;
    background:url(../img/base-whatsapp.png)top center no-repeat;
}
#whatsapp-btn{
    display:block;
    position:absolute;
    top:51px;
    left:14px;
    width:50px;
    height:50px;
    border-radius:50%;
    background:url(../img/btn-whatsapp.png);
    background-size:100%;
}