Z Index not working on a page

Hi, I have two code blocks that are not responding properly to the z-index on this page https://www.scratchbakerycafe.com/menu-breakfast 

As you can see on the attached screenshot the menu navigation should be over the menu items in the dotted box. I have tried targeting the specific div blocks in custom CSS as well as in the specific HTML blocks but it is not responding properly. 

Any help or insight would be appreciated. 

Thank you, 

I think you need to set z-index of section tag (section contains your green menu)

section[data-section-id="6542f1754bf11f01fc90394c"] {
	z-index: 99999 !important;
}