.btn-whats{
    position:fixed;
    display:block;
    cursor:pointer;
    z-index:999;
    background:#65bc54;
    border-radius:50%;
    box-shadow:0 0 2px rgba(0,0,0,.5);
    transition:background .3s ease;
}

.btn-whats.left{
    left:15px;
}
.btn-whats.right{
    right:15px;
}
.btn-whats.middle{
    top:50%;
    transform:translateY(-50%);   
}
.btn-whats.top{
    top:15px;
}
.btn-whats.bottom{
    bottom:15px;
}

.btn-whats:hover{
 opacity:.7;
}

.btn-whats svg{
    display:block;
    width:70px;
    height:auto;
    fill:#FFF;
    padding:15px;
}
.btn-whats img{
   display:block;
   height:auto; 
}