#back-to-top {
    background-color:#CCCCCC;
    bottom: 0;
    box-shadow: 0 0 6px;
    color: #444444;
    padding: 10px 10px;
    position: fixed;
    right: 50px;
    cursor: pointer;
    border-top-right-radius: 15px;
    border-top-left-radius: 15px;
}

#back-to-bottom {
    background-color:#CCCCCC;
    top: 0;
    box-shadow: 0 0 6px;
    color: #444444;
    padding: 10px 10px;
    position: fixed;
    right: 50px;
    cursor: pointer;
    border-bottom-right-radius: 15px;
    border-bottom-left-radius: 15px;
}