movimento-sem-terra/site-novo — pull request #161 by mauriciomelo (2014-06-12 07:01:08+00:00)
Title: Improving the accessibility 

Clip your hidden label is better than set font-size to 0px, just for better accessibility.

Modern browsers recognise the HTML5

element as navigation and give it the same attention. But explicitly setting the role="navigation" attribute just makes sure that a lot more technologies can pick it up.