Reducing padding in mobile menu

Hi, 

for some reason my mobile menu has suddenly started showing with a large area of padding between the nav links - i've had a bit of dig around in the developer tool and then into css to try and fix but none of my code has worked (beginner coder here). 

URL is: www.yangjewellery.xyz

Hoping someone can help find a solution to bring it all tighter again? 

TIA. 🙂

You have some code or CSS like this on your website, and that is causing the padding issue:

.container {
    width: 100%;
    aspect-ratio: 1.77777778;
}

Thanks so much! Sorted. 

So weird, it was some totally (meant to be unrelated) code for video cropping that was causing it.