Create one finished standalone photographic website background image, 1:1 square, approximately 1536 by 1536 pixels. Theme: Collective motion. Scene: Distant overhead view of a group of adult friends loosely seated along one broad white architectural stair, otherwise empty expansive steps. Art direction: Photoreal aerial editorial photography, small believable full-body adult figures, convincing shadows and spatial scale. Strong graphic composition with spacious plain architecture. No miniature toy look, no duplicated people, no text or logos. Composition: retain generous low-detail top space suitable for overlaying website copy, adapting subject placement naturally. This is the actual background artwork, not a website mockup. No text, letters, typography, logos, borders, collages, grids or watermarks. Full-bleed, polished, richly detailed at native resolution.