Header Issues, Unresolved

there is a weird pink rectangle appearing beneath my header on my new website. It does not appear on my homepage but it appears on every other page. I’ve tried every custom css to get rid of it but i honestly don’t even know what it is called. Please help. my website is https://www.atplaserdesign.com

The page example where the pink rectangle is https://www.atplaserdesign.com/all-items/