If you open the network tab of the developer tools (in Chrome F12), and refresh the page, you should be able to see if the css files are requested, and what the server response is (if any). Maybe that will give you more info.
Ok, the inspect element tab says that no css file or js file has been found (404 error) when I’ve directed the domain name chewbah.at to the site. But when I use the http://www.gholubowicz.com/Chewbahat/One-pager/ address, the browser founds everything. I’m thinking maybe the .htaccess? But I’ve no clue how to correct it. (I mean I know where to find it, and how to edit it, but no clue what to write in).