Hi there froxas908, i had the same problem. Carefully read the instructions before you try it:
Your .red-box rule should include a fallback with the background set to red immediately before the existing background declaration.
When you put it like this: “background: var(–red-color);” you are not reading the instructions. It says “before” the existing background declaration. So the answer will be:
Why do you think is broken?
If you use the “Ask for help” button inside the challenge you will create a forum post that has already your code formatted in it
Or just copy your code here using the </> button in the post editor to format you code
It’s actually working. I had the same issue (with writing the code and it was saying that I hadn’t done it properly), but I chose to “Reset all code” and then just wrote one line -> background: red; and it worked. maybe if you change something in CSS (though you delete) it has some kind of…bug?