img { display: block;
  margin-left: auto;
  margin-right: auto;
    /*border-style: solid;
  border-width: 2px;*/
  padding-right: 5em;
}

.html-widget { display: block;
  margin-left: 10%;
  margin-right: auto;
  height: auto !important;
    /*border-style: solid;
  border-width: 2px;*/
  padding-right: 1em;
  padding-top: 2.5em;
  padding-bottom: 4em;
}

pre { overflow-x: visible; }