Sense 2.0 Adding Photo to header and footer

Technical Q&A
1

Im trying to add my own graphics to the header and footer of my website.

The theme I currently have running on my shop is not the theme I am trying to edit.

Here is the code I tried

.site-header{
background-image: url(https://cdn.shopify.com/s/files/1/0573/4943/9647/files/Untitled_Artwork_59.png?v=1646010458);
background-position: center;
background-size: cover;
}