[Theme Pinboard] Header background and wrapper

Hi,

Thanks by advance for helping me solving my problem :

Problem : I want to add a background image in the header AND want to keep the social media icons.

Part of solution : I looked at the header.php (I already have created a child theme) and saw a “div wrapper”. So I wanted to create a wrapper2 in style.css in order to have a specific one in the header (and so change the div name)

The problem is that I don’t see any wrapper now and it erases the other wrapper in the body when I look at the page…

Thank you