Single post in Site Skins: How-To, and Helpful CSS

I use the code myself and it works, and it's copy-and-pasted straight out of my CSS. To clear your cache on Chrome, go to Settings > Advanced > Privacy and Security > Clear Browsing Data. You don't need to clear your browsing history or cookies, just the cache. The exact steps may vary from browser to browser, but it should be in your settings somewhere. Google it for your browser if you still can't find it. Let me know if that still doesn't work, and I'll take a look at the CSS you have in there.