Using CSS in DocRaptor is exactly the same as in normal web pages. You can embed your stylesheet with a style tag:
<style>
body {
background-color: blue;
}
</style>
Or use inline styles:
<a href="<a href="https://docraptor.com%22" target="_blank" rel="nofollow noopener noreferrer">https://docraptor.com"</a> style="color: blue;">DocRaptor!</style>
Or link to an external stylesheets with absolute URLs (or define a baseurl for your document). While we fully support external stylesheets, it is slightly faster to use <style> tags because we don't have to fetch your CSS file.
<link rel="stylesheet" media="screen" href="<a href="https://yourdomain.com/stylesheet.css%22" target="_blank" rel="nofollow noopener noreferrer">https://yourdomain.com/stylesheet.css"</a> />