I left my MacBook in sleep mode in a cold car for a couple hours, how bad is this?

I left my MacBook Pro 14 in the trunk of my car last night while visiting a friend last night, forgetting that the temperature would drop to about 20 degrees Fahrenheit. It was in sleep mode with a few programs still open. Remembering this, I brought the computer inside and waited a good 24 hours to use it again, even though it had only been about 2 or so hours. Seems to be running fine, but I'm paranoid that I might have messed up haha. How bad of an idea was this?