Mobile menu font size and spacing

Hello, can you get me CSS to increase mobile font size, sub menu font size & line spacing? I just need to the mobile menu to look better. Please let me know what will look good. thanks!

I also have that very top of page link that says “Book a Free Strategy Call” That goes to an anchor link “https://bemodesign.com/contact-bemo-design/#book-call but it cuts off the top of headline when it does. how can I move this down when they click on this achor link?

THanks!!