Navigation Button on Ipad

Hello, I’m working on a site that uses @media for alternating between horizontal nav menu for bigger screens and toggle button drop down nav for smaller screens. While viewing my site from the ipad mini 2 which has a max screen width of 768pxs my nav pages fall underneath each other from lack of room. I’m wondering if anyone knows what I need to change in order to just have the toggle dropdown appear on the ipad? The site is

https://www.ai.dorianlatelle.com

Thanks!