title: Why doesn't em font-size resize on responsive grid?
body: <p>I've created a responsive grid and used em as the font-size to make the text resize, but I must not be fully understanding how em's work as there is no resizing of text.</p>
  
  <p>Live site:
  <a href="http://www.rubytuesdaycreative.co.uk/testsite/shop.html">http://www.rubytuesdaycreative.co.uk/testsite/shop.html</a></p>
  
  <p>Following Ethan Marcottes book I've set the body font to <code>font-size:100%</code> and then made by text within the cpation on the page linked above as 2ems - so double the base size... Am I doing it wrong? It doesn't seem to change at all.</p>
  
  <p><a href="http://jsfiddle.net/jm3sK/">http://jsfiddle.net/jm3sK/</a></p>