/* A real photograph is visible throughout the download; never hide page content. */
img[data-progressive-image] { transition: filter .35s ease; }
img[data-progressive-state="preview"],
img[data-progressive-state="queued"],
img[data-progressive-state="loading"] { filter: blur(1px); }
@media (prefers-reduced-motion: reduce) {
  img[data-progressive-image] { transition: none; }
}