Internally, this is just a proxy to news.ycombinator.com that injects a custom `news.css` style sheet on some routes (login routes redirect back to HN). If you want to use the style sheet on the client side, there are browser extensions and a custom style sheet available at the github repo [0].

[0] https://github.com/anthmn/hackertosh.css

edit: try https://hackertosh.org/news if the page is blank