oembed.frame.css

Same filename in this branch
  1. 11.1.x core/modules/media/css/oembed.frame.css
iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  margin: 0;
}

File

core/themes/stable9/css/media/oembed.frame.css

View source 
  1. iframe {

  2.   position: absolute;

  3.   top: 0;

  4.   left: 0;

  5.   width: 100%;

  6.   height: 100%;

  7.   margin: 0;

  8. }