I'm very new to this but I'm working on a website in HTML/CSS. The background looks fine on my macbook pro, but when I view my site on any larger screen, the background repeats and the site content stays in the top left hand corner instead of moving to the middle of the screen.
Is there any way I can make my site look the same on larger screens as it does on my own? Is there a tag to resize an entire website to fit whatever screen is viewing it?

Thanks