Found that by running css-lint on the code

fix(PDF Export): Mark as important `width`, `height` and add `zoom` properties to fix CSS rules which were overrided by inline styles

  font-size: 18pt; instead of fount-size: 22pt;
  remove the "a" tag from def that forces font size, otherwise anchors in various contexts, e.g., headings, etc., will cause ugly rendering due to mismatched font size.
   specify font size for "pre" tags so that code listings more closely match browser rendering