how do l make a different website outline for mobile and pc?

Question

For example, I want the navigation block to in the top-right in pc while it should be in the center for mobile version.
Or i want some paragragh to float to the left in pc version, while in mobile version all paragraph should be in the center?
This also doesn't work: <meta name="viewport" content="width=device-width, initial-scale=1.0 >

Answer 1

Thanks.

Answer 2

Try making two separate sites first. The user interface, hardware and software of the platforms are different. Focus on one platform at a time