Architectural drawing, various symbols, grid paper background, 2D illustration, bold lines, precise geometry, detailed annotations, arrowheads, section marks, leader lines, dimension lines, wall sections, floor plans, elevations, cross-sections, top views, isometric views, one-point perspective, two-point perspective, three-point perspective, orthographic projection, axonometric projection, oblique projection, bird's eye view, worm's eye view, parallel lines, 45-degree angles, geometric shapes, building elements, doors, windows, stairs, roofs, columns, arches, modern style, minimalist aesthetic, clean composition, high contrast colors.