Pure CSS Drop-down Responsive
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This drop-down uses the the adjacent sibling combinator (+) to select the adjacent sibling using it's pseudo selectors.

A [Pen](http://codepen.io/FadilE/pen/PwGpap) by [Fadil Eledath](http://codepen.io/FadilE) on [CodePen](http://codepen.io/).

[License](http://codepen.io/FadilE/pen/PwGpap/license).