.UIBackTopTopControl {
        position: fixed;
        bottom: 10px;
        right: 28px;
        background-color:  #ff00009e;
        z-index: 10;
        width: 50px;
        height: 50px;
        border-radius:1000px;
        color:#fff;
        font-family:"Font Awesome 5 Pro";
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        text-align: center;
        cursor:pointer;
}
.UIBackTopTopControl:before {
        content: "\f106";
        position: relative;
        top: 10px;
        font-size: 25px;
        left: 1px;
}