title: Best units to responsive layout
body: <p>I am starting a new responsive application, and i was thinking in use percentage to ( Font / Width / Height / Margin / Padding )... will my application get heavy ??</p>
  
  <p>what is the best unit to use for:</p>
  
  <ul>
  <li>Font</li>
  <li>Width</li>
  <li>Height</li>
  <li>Margin/Padding</li>
  </ul>