Some good CSS suggestions for markdown
https://raw.githubusercontent.com/1000ch/markdown.css/master/markdown.css
The one that I am using in this blog:
https://raw.githubusercontent.com/NightNineCat/markdown-pdf_css/master/markdown_2.css
I am still trying to figure how to get a codeblock that shows white text on a black background.
I will update this post, when Ive found the solution.