Since last year we have created our styleguide with a custom design library. This is platform independent and can be used for all our portal, java en .net apps and mendix apps. In our mendix applications we have removed the atlas lib css and use this custom css library. This works, but means we restyle all widgets with our “custom” css. Is it a good idea to ignore the atlas ui lib css completely? Will this cause trouble some day or is there chance of missing out future evolutions?