Vertical 9:16, one continuous five-second shot. Consistent character identity, clothing, anatomy and object shapes. Restrained believable motion, clean composition, stable lighting, no cuts, no written text, no logos, no captions, no dialogue. Photorealistic selected adult woman in a modest sage activewear top, standing by a large studio window with a rolled yoga mat on a bench. Medium portrait, calm breath and gentle smile, no exercise poses, stable anatomy.