Is Kadena layer 1 or 2?

I'm curious, can you clarify for me if Kadena operates as a layer 1 or layer 2 blockchain solution? Understanding this distinction is crucial for assessing its potential within the broader blockchain ecosystem and how it might integrate with other networks or protocols. Could you elaborate on Kadena's positioning in this regard and any unique features or advantages it offers as either a layer 1 or layer 2 platform?