realistic architectural floor plan 76 sqm apartment single floor layout top left double flight staircase with landing top right bathroom with bathtub toilet and sink right side l shaped kitchen with 4 burner cooktop sink countertop and refrigerator center and left open plan living and dining area with corner sofa round coffee table rectangular dining table for 6 full width balcony loggia along the south wall with two sliding glass doors interior doors with swing arcs shown clean white background black walls architectural top down orthographic view professional real estate floor plan style 1 50 scale metric units furniture shown in plan view room labels in polish