Modern architectural portfolio, A4 size, clean layout, sans-serif font, Arial, Helvetica, Montserrat, bold headings, clear typography, minimal ornaments, neutral color scheme, white background, professional tone, elegant lines, geometric shapes, 3D models, blueprints, sketches, renderings, urban landscape, cityscape, skyscrapers, contemporary buildings, futuristic designs, metallic materials, glass facades, concrete structures.