Even if I am not so experienced with css and php, but I have access to ftp, I can try to find a more responsive JEM in Frontend
1. Create template overrides (best is to start with protostar template)
2. I copy the media/com_jem/css files in a custom folder and use them in the settings
3. I study the
getbootstrap.com/css/
and try to add/change things.
4. I can try the changes when I make the window smaller and I can try, how it works on my smartphone.
BUT NEVER CHANGE THE ORIGINAL FILES
We need helpers even with less experience, it's open. Let's share what we find!
EDIT: I think this works only on Joomla 3.x +
