Help using grid to create a map

Hi there

I am trying to create a map using grid. But whenever i try to create a map and i complete it perfect to my mac, ill try it on a different pc or screen size and the cover div i chose for the image is not covering the base image.

This is very annoying, any ideas?

Under maps page.
Read only - https://preview.webflow.com/preview/classicperspective?utm_source=classicperspective&preview=db4a08d091e2c6dfd071af83398dd383

Thanks for the help guys!!!

Mine would be to not use a grid. The HTML5 map element is designed for this.

FYI: When you answer your own post to bump it, it looks like you might have resolved it. Be patient. You posted on a Friday night. It is a weekend. Also the community is a two way street. Get help, give help. I have to go back to work outside. Lots of spring cleanup to do on 21 acres.