What's the set of configurations of quarks which feels from the inside like thinking or like the color red?

Do you demand the exact wave function?

How can you be so confident that no magic is involved in this "how it feels from the inside" business, while casually talking about configurations of neurons?

I was never much comfortable with "consciousness is how thinking feels from inside" explanation, since it hardly explains anything. However, the alternatives are non-explanations even more. Unless the hypothesis predicts something testable, it is useless. The position that no non-standard physics is involved is a kind of default which is held whenever there are no clear reasons to think otherwise, that's all.