#top-navigator {
    position: fixed;
    right: 20px;
    bottom: 50%;
    z-index: 99999;
    cursor: pointer;
    display: none;
}

    #top-navigator:hover {
        opacity: 1;
    }

#arrow-up:before {
    font-size: 45px;
    content: "\21EA";
    color: #b30000;
}