.imageblock {
  position: relative;
  margin: 1rem 0;
}

.imageblock > .image {
  display: block;
}

img[title="small"] {
  max-width: 450px;
  height: auto;
}

img[title="medium"] {
  max-width: 600px;
  height: auto;
}

img[title="small:center"] {
  max-width: 450px;
  height: auto;
  margin: auto;
}

img[title="medium:center"] {
  max-width: 600px;
  height: auto;
  margin: auto;
}