Aligning in phone and pc

Question

I am trying to create a website that works in both pc and phone aligning itself. What should I do/ learn. Can you help??

Answer 1

responsive web design...

https://www.sololearn.com/Course/Responsive-Web-Design/?ref=app

Answer 2

https://www.sololearn.com/learning/1162

Answer 3

To align in all devices use the "%" symbol instead of "px" so that it will adjust automatically