Any advice for me regarding my portfolio

Hi all! Thanks in advance for checking out my portfolio. I’m brand new to jquery. Been studying it on Treehouse. I used it to pull up my pages from the navbar. I designed this for mobile and desktop. I think it might still look ok on ipad not sure. I would just like some advice from anyone as far as how my code is written. I tried to keep it as organized as possible, but I feel like I get sloppier, the further I get into writing the CSS. It seems like things start behaving strangely because of the cascading (that’s why I put that “Tweaks” at the end of the style sheet.) Also, any advice on writing better jQuery. THANKS!