Is Mina a layer 1 or 2?

Could you please clarify for me if Mina falls into the category of a layer 1 or layer 2 solution? I'm trying to understand its positioning within the broader blockchain ecosystem, and this detail seems crucial to my comprehension. Layer 1 solutions typically refer to the main blockchain itself, while layer 2 often pertains to additional protocols or applications built on top of layer 1. Could you elaborate on this distinction and how it applies to Mina specifically? Thank you in advance for your assistance.