Hi @linden
At first glance, this is not loading the css file, so you just have the html displayed. Have you changed any file names?
Does it display ok if you just open the index.html in a browser before uploading to Filezilla?
This thread has some useful guidance: How to use export code after it's been exported
I’ve not exported code from Webflow to an external ftp before, so I can’t offer much in depth advice - but hopefully that is useful.