'There's an error with your CSS code, please review it' to any css i tryed to upload

[maxkojju]

I've been trying to post the code on stylish for several days now, but the same error always pops up. For demonstration purposes, I cut the entire code to one block, but even so it won't post. Attempts to use Google, and later AI, didn't help. I hope that here you will explain to me why my code is not accepted
P.S. I tried adding www and https:// to the domain, but that doesn't help either

unknown_2025.06.26-14.19.mp4