#back-to-top {
    background-color: #000000;
    bottom: 0;
    box-shadow: 0 0 6px #000000;
    color: #000000;
    padding: 10px 10px;
    position: fixed;
    right: 177px;
    cursor: pointer;
}

#back-to-top a{
    color: #fff;
    text-decoration: none;
}

#plane {
    background-color: #000000;
    box-shadow: 0 0 6px #000000;
    color: #000000;
    padding: 10px 10px;
    position: fixed;
    right: 177px;
    cursor: pointer;
}

#plane  a{
    color: #fff;
    text-decoration: none;
}