.sketchfab-embed-wrapper {
    position: relative;
    padding-top: 56.25%; /* proporcje 16:9 */
    height: 0;
    overflow: hidden;
    max-width: 100%;
    margin: 40px auto;
  }

  .sketchfab-embed-wrapper iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
  }