Remove gap at the top of Kent on mobile

Hi all!

I'm having a slight issue with Kent. I'm happy with the way my site looks on desktop, but as soon as I move to mobile, a pretty unsightly gap appears between the top navigation and the body of the site (see screenshot). It may be an issue with the Site Title (I haven't been able to successfully remove it, and instead made it as small as possible) but I'm not certain. Any idea what sort of custom CSS I can use to remove or reduce this space?

site here: https://www.withlove-newyork.com/

Thank you!

@Ccr

@media only screen and (max-width: 640px) {
header#header {
   display: none;
}
section#page {
   margin-top: 0 !important;
}
div#mobileMenuLink {
   padding-bottom: 0 !important;
}
}