div.wdg-layout-stack, div.wdg-layout-stack > div {
  position: absolute;
  display: block;
  left: 0;
  top: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
}

div.wdg-layout-stack > div.scroll {
  overflow: auto;
}

div.wdg-layout-stack > div.fade-in {
  z-index: 1;
  opacity: 1;
  transition: opacity .3s;
}

div.wdg-layout-stack > div.fade-out {
  z-index: 0;
  opacity: 0;
  transition: opacity .3s;
}