Is Mina a layer-1 or 2?

Could you please clarify for me? Is Mina categorized as a layer-1 blockchain solution or a layer-2 scaling protocol? I'm trying to understand its position within the broader cryptocurrency and blockchain ecosystem. Could you elaborate on its characteristics and functionalities that might indicate its classification as either layer-1 or layer-2? It would be greatly appreciated if you could provide some insight into this matter. Thank you for your assistance.