Contract bytecode, function logic and state variable storage

Hi there, I would like to get a better understanding on the separation between contract bytecode, function logic data and state variables on the storage level.

Although they seem to be separated diagrammatically, is there any possibility that contract bytecode or function logic data could collide with state variables in any way? If function logic data can never collide with state variables, there will be a lot more flexibility in modifying functions on the logic contract in a proxy-logic upgradeable pattern, at least more than what I previously thought.

Any in-depth explanation will be highly appreciated.