Question Crash after change in css file forum.css

So. I'm very confused. All day I was making my Kunena forum and for what???

Everything was fine and I just want to release the New Forum at my site www.archerybg.com and guess what - no categories at all.

I just make a change in components/com_kunena/template/default_green/forum.css, e.g.
at line 21 - #Kunena a:hover { color: #00CCCC;}.
I make it look like this - #Kunena a:hover { color: #00CCCC; overflow: hidden;} and all categories DISAPPEARED SUDDENLY. I undo the changes, but still the same. Everything else seems to be Ok but no categories.

Just don't know what happened.

Here is a link to the forum:

www.archerybg.com/forums

Also I use the Last Post module for Kunena and when I click on a link from it I receive the message: You do not have access to this Forum!

Hmm.. That happened to me once when I had hidden categories from anonymous users. Joomla default session timeout time is 15 min and after that you all private messages and categories go away.

It looks like that you're just fixed the problem.

Ok. It's from the options for the categories, e.g. who can see the forums and who can not. I just set them and it's OK.
Sorry about that post. I'm just so tired now. Good night. You can delete the thread if you want.

No problem. These mistakes are good to know, because they tell that something must be done to the user interface (at least if many people make the same mistake).