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-1 unrecognized media (max-device-width: 480px) <link rel="alternate stylesheet" type="text/css" href="stylesheets/mobile.css" media="handheld, (max-device-width: 480px), screen" title="mobile"> Max-device-width is listed here: http://www.w3.org/TR/2002/WD-css3-mediaqueries-20020123/#syntax