CSS 3 media queries make building a mobile version of your site incredibly simple — just add a few lines of CSS to handle the smaller screen size of tablets and phones. The only problem is that ...

CSS media queries can be inserted in your HTML pages in the following ways: Inserted into a element which refers to a CSS style sheet. This example shows how to add media queries to a link element.

The W3C, the group that helps create web standards, has finished work on CSS Media Queries, turning the cornerstone of responsive web design into an official standard.