Looking for feedback

Looking for feedback

I am a novice web designer and am close to completing my first full project. I have utilized an responsive nav bar that uses jquery (which I found online.), jquery and jquery ui throughout the site and was seeking some advice as far as best practices and ways to clean up the code. I also have an issue where my site is not recognizing my phone screen size, and is showing the desktop version. Is there a way for me to edit the css with ' @media and screen ' possibly? Also, I had intended for the jquery ui tabs to only be enabled on the desktop site, though it actually looks good on the mobile site, but would someone be able to tell me why this did not function as I would expect? (Where in the jquery for the nav resizing and changing the body class to desktop I added the tabs command.) Here is the link to the live site,   http://jovon07.10gbhost.com/gdoSite2.html , as well as to the jsfiddle https://jsfiddle.net/leggosteveo/dmjku4Lx/54/ .