Build nav interaction/transition from hero

[glynnis]

Build a navigation interaction that keeps the navigation on screen even when a user scrolls down past the hero image on the homepage.

• This may also include work on the nav functionality for other content pages.
• This should also include any transitions needed for small screen sizes (hamburger menu)

This may be a helpful article on how to achieve such a menu using only CSS: https://scotch.io/tutorials/building-a-morphing-hamburger-menu-with-css

[siakaramalegos]

Also needs to include a style modification for the current link (like if on About page or in Specialties section)

[siakaramalegos]

See also this for sticky nav with vanilla js https://www.w3schools.com/howto/howto_js_navbar_sticky.asp