Architectural blueprint symbols, detailed technical drawings, various shapes and lines, geometric patterns, ruler-straight edges, graph paper background, scattered pencils and erasers, coffee cup stain, crumpled up drafts, desk lamp lighting, modern office setting, urban cityscape outside the window, morning sunlight filtering through blinds, shallow depth of field, high-contrast black and white colors, bold lines and fine details, A4 size paper, orthographic projection, precise measurements, engineering atmosphere.