Accent in “Levántate” – how exactly do you understand it?

This accent is placed so that the emphasis remains the same, but my question now is: If you look at “levantar”, it has an “r” as the ending and thus the last syllable is stressed, so —> levantAr (or?) If you apply this to the above, the accent should logically be on “LevantÁte”, but then…