xp stands for xtra power css.
Recently, xp.css said 'hello world'.
xp.css can intelligently convert any app to super Responsive.
For Instance: Text size,div size, images, buttons etc all grows and shrink with device size. This means you don't need to write media queries or using any tool to create UI for mobile phones ( potrait / landscape) to smart tv.
Your UI get fit automatically as per size of device whether its mobile device or smart tv.
Xp.css is easy to implement.
open a issue in github and I will add you as contributor.