Conditional CSS doesn't work in Chrome (opens in new tab)

currently doesn’t work in Chrome. @media all and (min-width: 45em) { body:after { content: 'widescreen'; display: none; } } The problem is with how when set to display: none. My current solution/hack is to fallback to the head font-size code, as Opera now supports this. @media screen and (min-width: 45em) { head { font-family: widescreen; } } Thx .