How to position dropdown bootstrap 4?

Question

css

There is a mobile menu on the screen less than 991 https://lazy-mouse-24.localtunnel.me
I want the dropdown to stretch to full screen width, how can I do that? Maybe there is some way so that styles are not added inline when clicking, so that I myself can influence the positioning of the element through classes?

Answer 1

link does not work.
Well, write your styles on the class in media queries. it's not clear what needs to be done