.demo {
    width:450px;
}
#lightSlider-st {
    list-style: none outside none;
    padding-left: 0;
    margin-bottom:0;
}
#li-libro {
    display: block;
    float: left;
    margin-right: 6px;
    cursor:pointer;
}
#imagenes-libro {
    display: block;
    height: auto;
    max-width: 100%;
}