.btn-top {
    position: fixed;
    bottom: 75px;
    right: 20px;
    display: none;
    padding: 0px;
    border-radius: 50%;
    width: 50px;
    height: 50px;
}

.btn-bottom {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: none;
    padding: 0px;
    border-radius: 50%;
    width: 50px;
    height: 50px;
}