cannot load image inside CSS folder

[eluser]Aken[/eluser]
Image URLs in the CSS file are relative to the CSS file only. Has nothing to do with the current URL.

Your CSS and directory structure looks fine. Things to check:

1) The image actually exists.
2) The img folder has read access.
3) Clear your cache and check again.
4) The background isn't hidden through background-position, an element on top of it, etc.