I’m new at Tailwind css.
It’s not applying even though I followed the installation guide. I don’t know where the problem is.

I am new of using tailwind and I have a question for you .
I have figma design for mobile application and for desktop application for my web page.
I don’t know how to apply both mobile and desktop versions on my code so when I open the app in my phone only the mobile version will appear and the same for desktop version.
Should I use @media query for that?
Or there is another option for doing that?
Assume mobile screen width is less then 390 px and desktop is more then 390 px.
Thank you!