i.back-to-top, span.back-to-top, .back-to-top {
    position: fixed !important;
    bottom: 20px !important;
    right: 20px !important;
    cursor: pointer !important;
    opacity: 0 !important;
    visibility: hidden !important;
    transition: opacity 0.3s ease-in-out, transform 0.3s ease-in-out !important;
    z-index: 99999 !important;
}

i.back-to-top.show, span.back-to-top.show, .back-to-top.show {
    opacity: 1 !important;
    visibility: visible !important;
}