It works because the background is recognizable in spite of being out of focus. So when everything is put together, we have a cold and luminous December atmosphere in the image. And of course, the railing shape with a branching in the middle is well composed to lead the eye.
@angelikavr Thank you Angelika
@caterina Thanks Caterina
@overalvandaan Thank you very much
@robz Thanks a lot Rob agreed