#BtnToTop {
    position: fixed;
    bottom: 50px;
    right: 50px;

    width: 50px;
    height: 50px;

    background-color: #01bf69e6;
    text-align: center;
    color: #FFF;
    user-select: none;

    z-index: 999;
}

#BtnToTop img{
    height: 50px;
}

@media (max-width: 767px) {
    #BtnToTop {
        /* display: none; */
        position: fixed;
        bottom: 20px;
        right: 20px;
    }
    
    #BtnToTop img{
        height: 100%;
        width: 100%;
    }
}