Hey @erlend_sh,
I can remember that it was in discussion that the Code Blocks still used the white-themed-css for Code Blocks.
Did you try to change that? Because over here Code is nearly unreadable as it is Black Text on Grey ground.
Thanks for taking your time 
Edit: Some random block to see it.
public static void Main() {
Edit2: four space Intention doesn’t seem to work on mobile aswell, and the accents aren’t on my Keyboard as I don’t speak french.
Testing…
Public too()
// I don't even have curly braces...
End
Typing code on a phone sucks… Heheh
…it does… but you have to have more than one line. And yeah, no back ticks, or curly braces, or anything useful on a phone keyboard. (at least for me)
Afaik the changes keep getting reverted every time discourse gets updated. I only have access to an iPhone (my iPad Air, iPad 2, galaxy tab don’t have this problem) so I can’t get the css that needs to be changed. If someone can give me the css selectors I’ll fix it.