Trying to change when navbar toggles to mobile

Hi, I bought the Photon theme yesterday, and I’m having some trouble locating the file / location of the rule that toggles the navbar to the mobile mode.

Been looking through different CSS files / Bootstrap libraries but don’t see an @media rule or anything to specify when it switches over. I’d like to change when it happens. Is this possible?

Hi there

Try to use dev tools of the browser to find a line of the CSS code