Is there any WinXP compatible layout??

I have started using SpaceHey on Windows XP, and yes, y'all are free to say that i can't connect windows xp to the internet, but at least i am using a *secure browser called K-Meleon (totally not sponsored) which is lightweight and has all pretty n' neat functions that make it cool, i logged into my spacehey account and realized that the CSS of my profile didn't work, just for asking, is there any simple HTML stylesheet?? like really i need it for my WinXP computer, if there is a basic HTML stylesheet please let me know, if not i will try to make my own lol.

Edit: i am now using Supermium (also not sponsored) which is based on chromium so no problem, now i can freely surf the web in a Windows XP computer. bruh.