Responsive design

By default, the accordion plugin is responsive (or rather, it doesn’t care how wide the viewport is). The code I provided for the columns was not and will have to be rewritten with media queries in CSS. I can’t really provide all the code necessary to do something like that as it really has nothing to do with this plugin and is more of a theming issue (and it’s underlying grid structure).

It looks like there is some sort of underlying grid on your site that is already responsive (see this page). I’d recommend using those classnames (one-half first and one-half) in place of the row and col half classes I suggested. If you can’t get that working, I recommend contacting your themes developer and asking if they can assist with setting up the 2 column structure you are looking for.