Having a little trouble

I have created a table on my wordpress site, installed your plugin and utilized the css from this location to make it responsive:

http://codepen.io/geoffyuen/pen/FCBEg

Unfortunately it is having no effect whatsoever on the page. Any chance you might be able to help me out on this. Important that I get this working properly.

Thanks so much for having this plugin. I hope there is continued support for it.

https://wordpress.org/plugins/page-specific-stylesheets/