How to change drop down menu on mobile site

Site URL: http://aaronjayyoungstudio.com

On the mobile version of my site, when you click on the menu icon, the menu drops down covering the screen. Then when you click on a menu item, it goes to that part of the website, however the menu continues to cover the screen and you have to click an "x" at the top right for the menu to go back up. 

I'm searching for a way to make the menu go back up automatically after clicking on an item. 

website - www.aaronjayyoungstudio.com

I think I answered your email.

With this question, you can find in SS settings, or use custom CSS (Home > Design > Custom CSS)

.header--menu-open .header-menu.black-bold .header-menu-bg {
    background-color: red;
}