Compromised mid century modern house. What would you do?

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Hey, I just started to renovate a house on the photo attached. The roof was added by the previous owner. The house is supposed to be mid century modern style with flat roof. The gabled roof and the decks were added. Firstly, let me ask you what do you think? Does it compromise the style a lot? Can I still bring it to mid century modern style and keep the roof in place?

and the last, I am planing to color is in a shade of white, which color should I use to paint the rails and the columns.

I kind of feel that the columns were added as well. Any thoughts?