I'm working on a responsive Product Customization feature for an e-commerce website that has a hamburger primary nav, but will also need a secondary navigation for selecting the main Customization aspects of the product, and a tertiary navigation for selecting options within the secondary navigation.
Here is the desktop version of the Customization interface
And here is the current responsive design
The layout does not translate well to responsive, as the user is swamped with layers of Customization options. I've researched responsive navigation pattern best practices but have come up short.
What's the ideal way to handle having a hamburger primary navigation, as well as secondary navigation, and a tertiary navigation with options directly related to the secondary navigation?