Messed my template, help please!

I was editing the template by changing the font style but somehow (i might have mistyped something) the background colour has changed and I can’t find the piece of code to change it back to black. here’s the link to the blog: https://www.fernandosouza.org

and here is the css code for it:

[moderated – please put your code in a pastebin like https://pastebin.com/ and report the link back here. Thanks.]