What does the '$' in CSS mean? : <p>I saw an animated project with a bunch of '$' in it. I have no idea what dollar signs are used for in CSS. I'm guessing it is for animations. Here is a sample of some of the code I was looking at:</p>

<pre><code>$emoji-base-color: #FFDA6A;
$emoji-like-color: #548DFF;

.emoji--like {
background: $emoji-like-color;
 &amp;:after {
            content: 'Like';
         }
</code></pre>

<p>Here's a link to the entire project: <a href="https://codepen.io/AshBardhan/pen/dNKwXz" rel="noreferrer">https://codepen.io/AshBardhan/pen/dNKwXz</a></p>
