div.wm-parallax {
  margin: 1em 0;
  line-height: 0;
  text-align: center;
}
div.wm-parallax > ul {
  display: inline-block;
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}
.wm-parallax li,
div.wm-parallax > ul > li.layer {
  display: block;
  position: absolute;
  margin: 0;
  padding: 0;
  left: 0;
  top: 0;
}
.wm-parallax li:first-child,
div.wm-parallax > ul > li.layer:first-child {
  position: relative;
}
.wm-parallax img,
div.wm-parallax > ul > li.layer > img {
  max-width: 100%;
  height: auto;
}