.picture {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
}
.picture img {
  max-width: 100%;
  width: 100%;
  height: 100%;
  -o-object-fit: contain;
  object-fit: contain;
  vertical-align: top;
  max-height: inherit;
}
.picture__caption {
  position: absolute;
  bottom: calc(var(--spacing-internal) / 2);
  left: calc(var(--spacing-internal) / 2);
  width: 52%;
  padding: calc(var(--spacing-internal) / 2) var(--spacing-internal);
  background: var(--colour-neutral);
  color: var(--colour-one);
}