s good">/* Recommended */
h3 {
  font-weight: bold;
}
</code></pre>

<h4 id="Declaration_Block_Separation" class="numbered">Declaration Block Separation</h4>

<p>Use a space between the last selector and the declaration block.</p>

<p>Always use a single space between the last selector and the opening brace that
begins the
<a href="https://www.w3.org/TR/CSS21/syndata.html#rule-sets">declaration block</a>.</p>

<p>The opening brace should be on the same line as the last selector in a given
rule.</p>

<pre><c