title: Jekyll doesn't apply CSS to posts on GitHub Pages
body: <p>Yes, I know that this question has already been asked multiple times, and I've applied every solution that I could find, but I still have this issue:</p>
  
  <p>If you visit my Jekyll site (<a href="https://yasath.github.io" rel="nofollow noreferrer">yasath.github.io</a>), the homepage and the tags page in the navbar render the CSS perfectly and look beautiful. However, when I click on a post (<a href="https://yasath.github.io/2017/09/04/hello-jekyll.html" rel="nofollow noreferrer">like this one</a>), the CSS completely fails to render and I end up with an old-looking white background, Times New Roman text page!</p>
  
  <p>My <code>config.yml</code> file has the right URLs (as far as I know!), and when I view the source of both pages with Chrome's developer tools, they both import the same CSS file correctly.</p>
  
  <p>Hopefully, someone can give me advice specific to my site! <a href="https://github.com/yasath/yasath.github.io" rel="nofollow noreferrer">This is the GitHub repo for the site</a>, and again, here is <a href="https://yasath.github.io" rel="nofollow noreferrer">the actual site</a>.</p>