body {
  margin: 0;
}

body.overlay-open {
  overflow: hidden;
}

.screenshot {
  height: 100%;
  opacity: 0;
  transition: opacity 0.2s;
}

.screenshot.loaded {
  opacity: 1;
  /* https://stackoverflow.com/a/16833496/1263117 */
  -webkit-backface-visibility: hidden;
}

.overlay {
  z-index: 1000;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0);
  transition: background-color 400ms ease-out;
}

body.overlay-open .overlay {
  background: rgba(0, 0, 0, 0.9);
}

#close-modal {
  color: white;
  position: fixed;
  top: 10px;
  right: 10px;
  padding: 0;
  font-size: 50px;
  line-height: 50px;
  text-decoration: none;
}