Header logo & and header border overlap

Hi there,

II am trying to accomplish this header design and could use some pointers.

The challenge is to have the logo overlap with the border, however if I use the header border in SS, the logo defines the height of the header (hence pushes down the border) and I haven't figured out how to make it overlap with the border. 

I also tried inserting the logo as a fixed image in the footer but that way, I can't get it to overlap with the border, no matter how high I set the z-index. 

What would be the best approach? Should the green border OR the logo be a pseudo element? Or is there a way to make the logo overlap the border?
 

TIA!

Site: https://hmna.squarespace.com/
password: macadamia

Hi,

I see you figured it out? Can you share solution for other members?

@tuanphan Yes!

I just adjusted the margin: 

.header-layout-branding-center .header-title {
margin-bottom:-10%;
}