Just imagine you get a css library that give you freedom from writing media queries in css file.
Intelligently it take care of your user interface in different devices with different sizes. You need not to worry anymore how your UI will look in potrait, landscape, small phone or smart tv etc
xp.css does everything you need for your app. Compatible with all morden browser, it does what it says.
Give a try and request to join our team. It's open-source.
You can find more details and demo here.