p>

<pre><code class="language-css bad">/* Not recommended */
a:focus, a:active {
  position: relative; top: 1px;
}
</code></pre>

<pre><code class="language-css good">/* Recommended */
h1,
h2,
h3 {
  font-weight: normal;
  line-height: 1.2;
}
</code></pre>

<h4 id="Rule_Separation" class="numbered">Rule Separation</h4>

<p>Separate rules by new lines.</p>

<p>Always put a blank line (two line breaks) between rules.</p>

<pre><code class="language-css good">html {
  background: #fff;
}

body {
  margin: aut