For a long time we have been able to specify styles for different media types using CSS, print and screen being the most recognizable. With CSS3 these media types have been extended to allow additional expressions, aka media queries, which gives us greater control on when specific styles should be applied. In this article I will focus on the orientation media query and have a fun demonstration showing how to use it.
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http://blog.varadesigns.com/how-to-use-css3-orientation-media-queries/