Problem with css grid on my tribute page

Problem with css grid on my tribute page
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#1

Hi,

i have completed my tribute page project but i cant let it go until i can find out why my final div keeps snapping to the right when the browser is bigger than 500 px.

can someone look at my codepen.io link and see if they know why?

it looks ok in mobile mode but in full browser is doesn’t sit right, the link at the bottom should spread across the bottom like a footer.

any help appreciated.

this is the first page ive ever written so any other advise is also appreciated.