0;
font: 100%/1.6 palatino, georgia, serif;
padding: 0 1em 2em;
</code></pre>

<h4 id="0_and_Units" class="numbered">0 and Units</h4>

<p>Omit unit specification after “0” values, unless required.</p>

<p>Do not use units after <code>0</code> values unless they are required.</p>

<pre><code class="language-css good">flex: 0px; /* This flex-basis component requires a unit. */
flex: 1 1 0px; /* Not ambiguous without the unit, but needed in IE11. */
margin: 0;
padding: 0;
</code></pre>

<h4 id="Leading_0s"