I'm building a design where I'd like to use a full-width background image just below the header. The problem is that the bottom edge of the image is a "wave" (i.e., not a straight line). I've tried various ways of doing this, including adding the image to both a section and a row and then playing with margins and padding, etc. I cannot figure out how to align the top of the image with the header and have the entire bottom "wave" part of the image show on all screen sizes. I'm looking for some best practices on how to work with background images, I guess. And/or specific help for this image. I can provide a link the the pages in question privately if needed.