restyle this architectural longitudinal section into a minimalist black and white presentation drawing critical preserve exactly do not reinterpret identical geometry proportions and scale identical camera framing crop aspect ratio and orientation every floor level slab thickness wall thickness ceiling height stair run opening position and opening size stays in place do not add remove merge or shift any room storey window door or structural element do not redraw anything freehand keep all lines perfectly straight orthogonal and aligned to the original style strict orthographic section no perspective no 3d no isometry pure white background pure black linework greyscale only zero colour clear line weight hierarchy heavy solid lines for cut elements medium lines for elements in elevation behind the cut plane hairlines for distant background cut poch filled solid black or 85 grey flat and even crisp vector like edges clean and precise high resolution calm restrained professional in the spirit of a swiss or scandinavian architecture competition board no textures no gradients no shadows no hatching noise no sketchy or hand drawn character no grain text do not invent add or alter any label dimension or annotation
