Show social media icons in front of header image

Hi, everybody!

Just moved to the Grisaille theme and I am really happy about it. It looks just the way I need my theme to look – except for one thing: I would like to have the social media icons in front of – instead of above – the header image. I imagine I will have to alter the margin or padding of the header to a negative number, but I can’t find the piece of code that does that for me.

Anybody out there who can help?

Thanks,

Jens