Metro is the name for the design language, the design philosophy, behind Windows Phone 7. This is not only in reference to the look and feel of the interface itself, but also to the animations which bring the 2D interface designs to life and the sounds that accompany user interactions on the devices.
Inspired by the way-finding graphics that you find in airports, railway and bus stations the world over, Metro is a homage to those high contrast, high color visualizations that stand out in those visually noisy environments.
In Windows Phone 7, Microsoft introduced its Metro style user interface. The Metro style UI is the touch-and-tile interface that Microsoft designed to create an interface focused on content, information, and movement.
It's quicker to find things in the start screen than the start menu.
It is designed to embrace 5 principles:
1)Clean light, fast, open aesthetics;
2)Dynamic, moving transitions and interactions;
3)Embrace the beauty of typography;
5)Authentically digital design.
What is Metro UI CSS
Metro UI CSS a set of styles to create a site with an interface similar to Windows 8.
It can be used to create Metro User Interface
1)Create page with HTML5 DOCTYPE
3)Include metro.min.js (jquery.js required)
4)Create main container with class .metro
5)Use markup, as described in the pages of this site