Trying to replicate google homepage

I’m trying to recreate the Google homepage but have come across some issues which i’m struggling with. As you can see from the Codepen
the footer is a bit tall and when I try and add a height figure to it, it makes the screen bigger. Also, one the codepen, it looks like the search buttons overlap the search box. On my browser it looks ok but i’m not sure how to get it to stay below.

Sorry if it’s something easy, i’m a newbie and been looking all over for answers.