transform this architectural section into a clean diagrammatic sketch render preserve exact geometry proportions and layout style architectural section infographic hybrid use clean linework with slight hand drawn variation soft shading and subtle watercolor texture apply a minimal color palette light grays and beige for structure muted green for columns soft yellow orange for circulation paths and blue accents for accessibility elements enhance depth with light atmospheric gradient in underground areas keeping edges crisp and readable add soft ambient lighting brighter at street level slightly darker and diffused in lower levels keep human figures simple and sketch like simplify trees and background buildings with low detail maintain diagram clarity clean edges no heavy textures no photorealism output style architectural presentation board clean minimal professional with subtle sketch character
