First of all, thanks for the awesome plug-in.

I've been trying to change the output code syntax highlight (which you said is styled by highlight.js) but for some reason the CSS from highlight.js themes don't works on markdown-editor. It seems that your plug-in use another classes for output code snippets and the styles don't apply.

Is there a way to use highlight.js themes on your plug-in? You you need to port each of them manually?