Options on futures margin requirements

I would like to ask about buying option spreads on futures.

In stock options when you buy a debit spread you just pay the whole amount and that's it. No margin required. What about futures options?

Let's say I have a $10,000 trading account and buy, for example, calendar spread on ES for $500, how much money from my account will be frozen?

Who use futures options platforms or Interactivebrokers please check the margin requirements for debit spreads on ES, NQ, ZN.
 
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