How much bank balance is required for Spain visa?

Could you please elucidate the financial requirements for obtaining a visa to Spain? I'm particularly interested in knowing the minimum bank balance that is typically expected for visa approval. Is there a specific amount that applicants need to maintain in their accounts, or does it vary based on factors such as the duration of the stay or the applicant's personal circumstances? Additionally, are there any other financial documents or proofs that need to be submitted along with the visa application? I would appreciate it if you could provide a clear and concise answer to these inquiries.