.sticky-btn{
    position: -webkit-sticky;
    position: sticky;
    width: 70px;
    top: 85%;
    z-index: 1020;
    margin-right: 1rem;
}
.btn-rounded{
    width:3rem;
    height:3rem;
    border-radius: 50%;
    padding:0;
}
@media(min-width:992px){
    .margin-up{
        margin-top: -3.7rem;
    }
}