I have a blog site @ google's blogger. Now I want to add my own styles in my pages. I have sufficient CSS knowledge to do this. But the problem is how do I save a css file, link it to my page and use in Google blogger it?
Note: I do not need to edit the blog template. I just need to add new styles to my page. E.G. : I need to create a code block by using codeBox class in my external style sheet file.
Sorry, but i don't think you actually can't, google Blogger uses their own GUI and its made for people who don't really know how to code (that's one of the purpose of blogs). I recommend you to host your site either on GitHub or you could host your own site vía a custom host.