Starling is basically an Actionscript library which mimics the usual tree architecture flash display. As opposed to the usual display objects, it entirely lives inside Stage3D environment.
Cascading Style Sheet or CSS is a type of format that enables the web designers and developers to design a website exactly according to the planned layout, complete with graphical effects.
If you do not have your business up and running in the form of a website, then you are missing out! Surely the internet phenomenon has influenced everyone.