Flat UI

いやはや、これは便利...？

http://designmodo.github.io/Flat-UI/

http://webya.opdsgn.com/introduceweb/flatcssframework/

http://commte.net/blog/archives/3259

http://matome.naver.jp/odai/2136870480076795601

http://dev.classmethod.jp/information-design/usability/consideration-modernui/