Mobile Style possible?

[forcerm]

I want to add a mobile style to my website. I've been looking at this one: https://vborg.vbsupport.ru/showthread.php?t=229238

How can i get this style to be automatically picked up by mobile devices? I don't offer my forum members a choice of styles, so i would like it to automatically use the mobile style when they access the site on a mobile device, and normal style when they access it on a computer.

or does it do this automatically?