You should ask theme devs. We cannot create separate mobile theme. It can be done only with desktop theme together. But as for css code - I'm working on it. Check other topic

At this point I've made up my mind about using a Responsive type theme and using software to create a web portal in apps to display the site. This way I don't have to republish the app and website, and people can surf forums etc seamlessly. The app would have a less of a drag on resources too.