Navbar & footer Bugs

[mathcodes]

Navbar & footer

• link logo to homepage
• fix overlap between the popup menu and large text in hero (related to my changes) on md devices

[YeezyWest]

i would love to work on this issue

[mathcodes]

Awesome. Thanks! First time? Please complete the first PR to get your creds! You can find instructions here... takes a couple minutes, and feel free to do it in the same PR 👍.

Let me know if you have any questions!