Take a look at the script you've linked to. It's not creating an
; it's creating an
HTML iframe tag
CSS in the outer document has no effect on the styles applied to a document hosted in an
The best you can do is use Bootstrap's Responsive Embed
] classes to ensure that the
resizes to fit the available space. How the embedded document responds to that is beyond your control.
Also note that the script you've linked to adds
to the end of the
attributes, so specifying
isn't going to work. If you look in your browser's developer tools, you'll probably see an error logged from the external script.