not only are they pure CSS (hence GPU accelerated and hence work lightning fast without any considerable lag) but they are also very (!) easy to write.. such th

not only are they pure CSS (hence GPU accelerated and hence work lightning fast without any considerable lag) but they are also very (!) easy to write.. such things with js would have easily taken north of 200 lines (non minified with proper new lines where required) where as with css it would only take something like 10-20 lines max.