Can you send a screenshot of your whole editor?
Here is the screenshot @noahlovell
Ahhh okay - this is the Wix Editor (which doesn’t support CSS). There was a bug earlier this week/end of last that mistakenly made it appear within the Wix editor - which might be what you experienced.
However, CSS is a Studio exclusive feature 
I already added global css code.
Is there anyway I can modify that code now?
Unfortunately not, it was an unintended bug that was reverted 