how to create d3 radial with dynamic radios

I created a radial with two tiers of options. I did in a way that isn't really dynamic and isn't really responsive to screen size. I now need it to be both of those things. Here is what it looks like when on the screen size I designed it for.

I created a working demo on sandbox that has the dimensions set how I need to use it on. This is what it looks like.

Here is link WORKING DEMO

any help is appreciated. Also keep in mind the outer tiers can have less or more options. it would be great if the blue toggle button would always align at the bottom of the radial like under the En of Energy Loss

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