/* Wrapper around the CS418 slide. All hotspot/popup coordinates below are
   percentages of this wrapper, so they track the image at any size. */
.slide-wrap {
  position: relative;
  display: inline-block;
  width: 100%;
  max-width: 40rem;
}
.slide-wrap > img:not(.ortho) {
  width: 100%;
  display: block;
}

/* Hotspot over the "Can foreshortening happen in orthographic projection?" box
   (box occupies 79.8-98.9% x 63.7-87.5% of the 1326x822 slide) */
.orange {
  width: 19.5%;
  height: 23.8%;
  position: absolute;
  top: 64%;
  left: 80%;
  cursor: pointer;
}
.orange:hover,
.orange:focus {
  background-color: rgba(255, 166, 0, 0.525);
  outline: none;
}
.orange:hover + .ortho,
.orange:focus + .ortho {
  display: block;
}

.ortho {
  width: 50%;
  display: none;
  position: absolute;
  top: 62%;
  left: 102%;
  z-index: 10;
}
/* not enough room beside the slide on narrower screens: show it below instead */
@media (max-width: 1399.98px) {
  .ortho {
    left: 0;
    top: 103%;
    width: 80%;
  }
}

/* Wrapper around the teal-annotated middle tile (819x455).
   Labels are positioned in % of the image and their font scales with it. */
.quilt-wrap {
  position: relative;
  display: inline-block;
  width: 100%;
  max-width: 819px;
  container-type: inline-size;
}
.quilt-wrap > img {
  width: 100%;
  display: block;
}
.quilt-label {
  position: absolute;
  color: teal;
  font-size: clamp(0.8rem, 2.75cqw, 1.4rem);
}