Robot cleaning street at night

A compact service robot methodically sweeps a narrow city lane at night, its low stance and purposeful motion shown in a tall 9:16 frame to emphasize verticality and urban canyon scale. The scene reads as quiet and focused with a slight melancholic tone, the robot moving toward a distant vanishing point framed centrally for portrait orientation. Surfaces remain clean and legible with micro-markings reduced to abstract lines on metal and pavement, and no signage competes with the composition. The air feels cool and damp with mist rising from recent rain, and the wet asphalt reflects diffuse neon so forms shimmer in blue and teal and warm amber highlights. Primary materials are brushed metal on the robot, wet stone pavement, and a worn rubber broom head for tactile contrast. The first plane resolves in crisp focus on the robot's midbody while the background layers recede with moderate depth to suggest alley depth. Light sculpts gentle separations and subtle rim glow that echoes the palette of deep navy, teal, warm amber, soft beige, and mid-blue. Framing is tight to medium within a vertical crop, eye-level viewpoint, balanced negative space above the robot to convey height and solitude. A single purposeful prop, a small waste bin with damp paper, anchors the narrative and scale. Render as a moody cinematic digital illustration with realistic texture and painterly edges to emphasize atmosphere and materiality.