Chamilo/plugin/h5p/cache-h5p/launch/source-guesstheanswer/H5P.Image-1.1/image.css

.h5p-image > img {
  display: block;
  width: 100%;
  height: 100%;
}
.h5p-image > .h5p-placeholder {
  background: url('placeholder.svg');
  background-size: cover;
}