title: How to set a max-width as percent AND pixels?
body: <p>How can I prevent the width of a div from expanding beyond a percent AND a pixel? In other words, the browser should calculate the pixel value of the percent, and then choose the lower of the two values.</p>
  
  <p>If I were to set them both like this: <code>{max-width:100px;max-width:20%;}</code> the asset pipeline would simply choose the second one and ignore the first one.</p>