flash cards resizing

I found the answer I was looking for... After publishing, you can add some css style to the index.html file

1. Unzip the exported course and in the "scormcontent" folder, open "index.html" in a code editing software (it works fine with notepad)
2. In the top region, you'll find a <style> tag. 
3. Add the following code after the <style> tag and before the </style> tag.

   @media (max-width: 150em) {
      .block-flashcard--medium {
          max-width: 350px;
          max-height: 350px;
      }
   }

4. Save the index.html file.
5. Rezip the files