div.cms_content iframe,
div.cms_content iframe {
  display: block;
}
.editable {
  box-shadow: inset 0px 0px 20px 2px rgba(0,0,0,0.2);
}
div.cms_content,
div.editable {
  display: block;
  margin: 0;
  padding: 0;
}
div.cms_content:before,
div.cms_content:after,
div.editable:before,
div.editable:after {
  overflow: hidden;
  height: 0px;
  width: 0px;
  content: '';
  display: block;
}