[Twenty ten] Wraparound text

Hi,

I know it has been a pretty debated issue but I still cannot figure how to do it properly. My understanding is that for it to work, you have to copy and paste a special code(cf codex)in your theme css stylesheet.
I tried it on the manifest theme with no results. So I decided to switch back to the Twenty Ten theme reasoning that it will be enabled by default.
Alas, wrapping text around images still doesn’t work. I am pretty clueless at the moment although I tried to do my maths before posting a query on this forum.
Here is the link to the site :
https://etainpyrexousardine.com
Thank you