Modify CSS of a newsletter form

Hello there,

I have a very basic newsletter subscription form like you can see here (this is the Revue Newsletter plugin, but it can’t be customized for the moment) ;

Capture

I would like to make it more attractive, like the one you can see here ;

I have the CSS and the HTML code, I already tried insert it everywhere in my blog but it doesn’t work properly…

Have you got an idea? :slightly_smiling_face: