title: Adjust css variable to increase size of css graphic
body: <p>Often time I found myself failed to adjust the size of a graphical asset if it's in css. Any tool or tip how to do that?</p>
  
  <p>For example I found this checker <a href="http://jsfiddle.net/awayF/491/" rel="nofollow">http://jsfiddle.net/awayF/491/</a></p>
  
  <pre><code>&lt;span class="checkmark"&gt;
      &lt;div class="checkmark_circle"&gt;&lt;/div&gt;
      &lt;div class="checkmark_stem"&gt;&lt;/div&gt;
      &lt;div class="checkmark_kick"&gt;&lt;/div&gt;
  &lt;/span&gt;
  </code></pre>
  
  <p>I might spend more than 10 min trying to adjust here and there. </p>