#back-to-top {
    color: #ffffff;
    background-color: #000000;
    visibility: visible;
    height: 22px;
    width: 80px;
    position: fixed;
    bottom: -80px;
    left: calc(50% + 640px);
    cursor: pointer;
    -webkit-transition: bottom .3s ease-out;
    transition: bottom .3s ease-out;
    text-align: center;
    z-index: 40;
}

#back-to-top.visible {
    bottom: 0;
}

#back-to-top p {
    margin-top: 5px;
    font-size: 0.7em;
}


.medialib-layout #back-to-top {
    color: #000;
    background-color: #fff;
    z-index: 2000;
}


@media (min-width: 768px) and (max-width: 1570px) {
    #back-to-top {
        left: calc(91.5%);
    }
}

@media (max-width: 767px) {
    #back-to-top {
        color: #000000;
        background-color: #ffffff;
        border: 1px solid #000000;
        height: auto;
        width: auto;
        bottom: -60px;
        left: auto;
        right: 0;
        vertical-align: center;
    }
    #back-to-top.visible {
        bottom: 54px;
    }

    #back-to-top p {
        font-size: 15px;
        margin: 16px 25px;
    }

    #back-to-top img {
        margin: 10px 7px;
    }
}