Underline on mobile menu header

Site URL: https://pumpkin-strawberry-tcz5.squarespace.com

https://pumpkin-strawberry-tcz5.squarespace.com

PASSWORD: kb

Hello.

I've added a full width underline on my header, but it gets hidden on the mobile menu overlay. 

I'd like to know if there's way to keep the underline on the mobile overlay menu too. 

Thanks, Katie. 

26 minutes ago, Katie_B said:

Site URL: https://pumpkin-strawberry-tcz5.squarespace.com

https://pumpkin-strawberry-tcz5.squarespace.com

PASSWORD: kb

Hello.

I've added a full width underline on my header, but it gets hidden on the mobile menu overlay. 

I'd like to know if there's way to keep the underline on the mobile overlay menu too. 

Thanks, Katie. 

 

 

Hi, yes you can add it by using below code into CSS editor
.header-menu--folder-list .header-menu-nav {
    border-top: 1px solid #000 !important;
}