Grid column size in pixels isn't working

Grid column size in pixels isn't working
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I’m working on a page right now that uses grip and flexbox and I need to know why my grid column pixel measurements don’t work.

Is it a Chrome problem? I simply can’t get a column to remain 1024px wide. Because if I do, the content, which is also 1024px will have gaps on either side, so it proves that it isn’t 1024px.