Bootstrap 3-css-wrapper (for wordpress plugin)

I want to apply [login to view URL] (Bootstrap v3 spesific, not v4) to a simple WordPress plugin I have made - but without (very important) affecting the rest of the theme of WordPress in user or admin area. This plugin outputs some content using shortcode into the users page or post. The solution to this, I have learned, is using an import statement using css or less into Wrapper! Like this: [login to view URL] I was thinking like this (this is the frontend-plugin): wp_register_style ( 'ds-fe-boot-css', plugins_url ( 'css/[login to view URL]', __FILE__ ) ); wp_enqueue_style('ds-fe-boot-css'); And inside css/[login to view URL], have this: .bootstrap-wrapper { @import (less) url( '[login to view URL]' ); } Then I should (like the manual says and some discussion forms says that works) be able to use use the div-class="bootstrap-wrapper" around all the the content i output in admin and user-area and get it Bootstrap v3 styles. I also tried to call the [login to view URL] for [login to view URL] and just use import less the same way. Somehow, I need to use less to import it into the .wrapper-class, but I want a quick answer to this - I have no clue on how to use less and don't have time to learn it :) I also want the [login to view URL] or similar to keep that kind of functions available. First one to provide an actual answer or can point out the error with complete direction will get the contest-prize at once today. There must be something I'm missing and I'm tired of testing. First and best one, I hope to get this fixed today. Background: I really like how bootstrap helps me order boxes vertically using rows and col-md, it helps me a lot since I'm not that good in css and finds it harder to do. Also bootstrap has a lot of helper-class in GUI that just looks good on buttons etc. HELP!