.slide-markers {
    text-align: center;
    display: block;
    width: auto;
    margin: auto;
}

.slide-markers div {
    width: 23px;
    height: 12px;
    display: inline-block;
    text-indent: -9999px;
    margin: 0;
    background: url(../img/swipe_slider_marker.png) no-repeat center top;
}

.slide-markers div.active-slide {
    background-position: center bottom;
}