Why is the grey bar not expanding?

Hi guys, just not sure why is the grey bar just in the middle of the image not fitting the grid blocK? Half my grid block is off the screen and I cant scroll down to access it .


Your BODY div (that’s holding everything) currently has a fixed height of 650px, which is limiting its height and causing grid items to flow off the screen. Set its height to AUTO instead and it will adapt to fit the size of its contents.