Mobile version of website issue

Tell us what’s happening:
hello everyone,
I have built a Markdown previewer and its working fine on laptop and i have added media query for mobile version and it is working but the issue is that the page on mobile screen moves it is not a still page.
thank you

Your code so far

Your browser information:

User Agent is: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36.

Challenge: Build a Markdown Previewer

Link to the challenge: