Hamburger menu "drop up"

Could not find this issue on a search. Hope you all can offer advice.
Trying to create my first site with Webflow and want the nav bar on the bottom of the viewing area.
When the site goes into responsive mode, I would like the hamburger menu to “drop up.” Recommendations on how to achieve this action would be appreciated.

I’m a newbie and I’m still trying to figure it all out.

Here is my public share link: