Theme Changes not applying

Hi,

we installed your plugin on our site to customize the main menù. As you can see in the page I linked to this ticket we’ve been able to set it up correctly structural wise.
There’s an issue tho when I try to apply some style through the themes panel. It does not apply the changes at all. For example, I tried to set up the color of the first and second items as white, but it does nothing.

I tested it deleting the cache and everything.
Can you suggest something I can try?

Best regards and thanks for your work.

Messina Carlotta

The page I need help with: [log in to see the link]