/* V5.17.1: keep the owner's original high-definition AT-86 image at a measured size.
   No enlargement of the old 219-pixel asset, no change to other technical slides. */
.lesson-photo img[src="assets/v517/at86-owner-original-1254.webp"]{
  width:auto;
  height:auto;
  max-width:min(100%,360px);
  max-height:360px;
  object-fit:contain;
  image-rendering:auto;
}
@media(max-width:540px){
  .lesson-photo img[src="assets/v517/at86-owner-original-1254.webp"]{
    max-width:min(100%,320px);
    max-height:320px;
  }
}