Using Dark Theme, my codeblocks look like this: (even with highlighting)

This is the raw source code for the post.
Other themes such as Minima have a cleaner codeblock look:

Is this an issue with the actual theme, or something on my end?
(also the codeblocks don't autowrap so big spaces will extend the page)
Using Dark Theme, my codeblocks look like this: (even with highlighting)

This is the raw source code for the post.
Other themes such as Minima have a cleaner codeblock look:

Is this an issue with the actual theme, or something on my end?
(also the codeblocks don't autowrap so big spaces will extend the page)