.menu-btn-backtotop {
    background: url("../resources/ArrowBack_norm.png") center center/24px no-repeat rgba(255, 255, 255, 0.9);
    width: 48px;
    height: 48px;
    position: fixed;
    border-radius: 100%;
    bottom: 20px;
    right: 20px;
    box-shadow: rgba(0,0,0,.2) 0 10px 32px 0;
    z-index: 9999;
    cursor: pointer;
    transition: all .1s ease-in-out 0s;
    display: none;
    border: 2px rgba(255, 255, 255, 0.9);
    /* Remove default focus outline */
    outline: none;
    -webkit-tap-highlight-color: transparent;
}

/* Normal hover state for all devices */
.menu-btn-backtotop:hover {
    background: url("../resources/ArrowBack_hover.png") center center/24px no-repeat #7b68ee;
    box-shadow: rgba(123, 104, 238, .4) 0 10px 32px 0;
    border: 2px solid #7b68ee;
}