Featured Articles show up behind mobile menu

In the mobile/tablet view, when I hit the feature button, the articles show up behind the menu. I’m trying to have them display underneath the feature button when you press the arrow. Any help would be greatly appreciated.

Here is my site Read-Only: [LINK][1]
([how to share your site Read-Only link][2])

[1]: http://
[2]: Share a read-only link | Webflow University