What is the Kraken margin fee?

Could you elaborate on the Kraken margin fee, please? As an investor in the cryptocurrency market, I'm curious to understand the specifics of this fee, including how it's calculated, when it's applied, and whether there are any associated risks or benefits to trading with margin on Kraken's platform. Additionally, I'd like to know if there are any minimum requirements or restrictions to consider before utilizing margin trading on Kraken.