In brief
transform-origin sets the origin of transformations. During rotation, center and top left produce different visible paths even with the same angle.
Useful to know
transform-origin sets the origin of transformations. During rotation, center and top left produce different visible paths even with the same angle. [1]
For a folding card, choose the intended pivot before tuning the motion. Changing the origin does not itself add an animation or move content in normal flow.
Sources
For further detail and to check the information: