.pf_lazy {
  padding: 0;
  margin: 0;
  overflow: hidden;
  display: block;
}
.pf_lazy img {
  filter: blur(0px) grayscale(20%);
}
.pf_lazy--transition img {
  transition: all 0.5s;
}
.pf_lazy .lazyloaded {
  filter: blur(0) grayscale(0%);
  transform: none;
}
.pf_background .pf_lazy .lazyloaded {
  transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  -webkit-transform: translate(-50%, -50%);
}
[op-background-image] {
  position: relative;
  z-index: 2;
}
[op-background] {
  background-size: cover;
  background-position: center;
}
.pf_background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
  overflow: hidden;
}
.pf_background img {
  /* https://stackoverflow.com/a/30778810/2838586 */
  position: absolute;
  top: 50%;
  left: 50%;

  max-height: none;
  max-width: none;

  height: auto;
  width: calc(100% + 2px);

  transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  -webkit-transform: translate(-50%, -50%);

  opacity: 0;
}
.pf_background img.pf_is_load {
  opacity: 1;
}
.pf_background img.pf_heightbased {
  width: auto;
  height: calc(100% + 2px);
}