Is Injective a layer 1 or 2?

Could you please clarify for me? Is the Injective protocol categorized as a layer 1 or layer 2 solution in the blockchain ecosystem? I'm trying to understand its position in the crypto infrastructure hierarchy and how it fits into the broader decentralized finance landscape. Could you elaborate on the features and functionalities that contribute to its classification? Additionally, how does Injective's architecture differ from other layer 1 or layer 2 protocols? Thank you for your assistance in clarifying this matter.