Surrealist Architectural Vintage Collage

Create a vertical 9:16 digital surrealist architectural vintage collage on a warm cream textured paper background with subtle grain, stains, and aged print speckles. Center the composition around a monumental gray concrete arch with two thick vertical legs and a rounded top, realistic brutalist texture with pores and chipped edges. Behind it place one large muted red-orange circle, partially obscured by the arch, like a flat sun or painted paper disk. Suspend a single classical plaster column fragment vertically in front of the arch, slightly left of center, with a capital and base, floating without support. Add exactly 4 floating concrete cubes: one large cube near the upper right, one small cube below-left of it, one tiny cube at lower left, and one medium cube near the lower-left bottom edge. Add exactly 1 irregular broken concrete rock fragment at the lower left. Add exactly 6 birds flying from the right side of the arch toward the upper-right area, rendered like vintage cutout swallows with dark wings and cream bellies. Include abstract drafting marks: dotted construction lines, a rectangular grid behind the upper-left of the arch, thin circular target lines on the right, a dotted diagonal guide on the left, and faint horizontal and vertical alignment lines crossing the collage. At the bottom, layer torn paper shapes: one beige textured scrap under the left arch leg, one olive-green torn paper patch behind the right leg, and one ochre-yellow vertical paint swatch with rough brush edges in front of the lower right leg. Use a restrained palette of {argument name="background paper color" default="warm cream"}, {argument name="main circle color" default="muted red-orange"}, {argument name="architecture material" default="gray concrete"}, olive green, ochre yellow, and charcoal drafting lines. Keep the style as mixed-media vintage editorial collage, surreal but elegant, with generous empty space around the central object, no typography, no frame, no watermark.