Auto Resize Page for Mobile Browsers

Hello,

I currently have a wordpress site that gets a lot of mobile traffic. The theme is “Admired.” Here is my stylesheet:
https://pastebin.com/QZaGLFaH

Is there any easy way to make the website automatically resize to fit the page when viewed on a mobile browser (so mobile traffic can see the WHOLE webpage at once)? I want to do this instead of using a whole different template just for mobile traffic.

Thanks