You may have come across Nikita Prokopov’s (aka tonsky) iconic post Hardest Problem in Computer Science: Centering Things.

Even if it’s hard. Even if tools make it inconvenient. Even if you have to search for solutions. Together, I trust, we can find our way back to putting one rectangle inside another rectangle without messing it up.

Months later, I think I know how:

And for more advanced users, for when you want to make sure that your element is not only centered, but also not tilted in any way, I present you this:

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