.progressive {
  position: relative;
  display: block;
  overflow: hidden;
  outline: none;
}
.progressive img {
  display: block;
  width: 100%;
  max-width: none;
  height: auto;
  border: 0;
}
.progressive img.preview {
  filter: blur(2vw);
  transform: scale(1.05);
}
.progressive img.reveal {
  position: absolute;
  left: 0;
  top: 0;
  animation: progressiveReveal 1s linear;
}
@keyframes progressiveReveal {
  0% {
    transform: scale(1.05);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}