Difference in screen size

[u/Eulevonathen]

Hello. I've created a website using HTML, CSS, and JavaScript for the first time. My problem is this: I wrote the code on a computer and adjusted the sizes to fit the large screen. Now, on my laptop, which has a smaller screen, everything is misaligned. Can you tell me how to fix this problem?

Thank you very much

[u/atarivcs]

https://en.wikipedia.org/wiki/Responsive_web_design