How to import HTML/CSS files?

Hello,

I’m wondering if it is possible de import html/css files directly in weweb and if “yes”, how?
I found this page : 🎨 Closer integration with native CSS

and what i saw in the first gif seemed pretty cool but where is it now? Is it still available?

I tried to use a section with a html element to load all my page. It works but having the whole code page in a section doesn’t sound right. :thinking:

Besides, how can i add an image in my code in this case?

Thank you for your time.