Canvas 1024x1024 RGBA PNG, transparent except the glasses.

Style: bold cel-shaded 1980s disco cartoon, thick black outlines matching the base, flat colours, crisp white glossy highlights on lenses and frames.

Facing: slight-right, chin slightly raised; draw every pair in that perspective (viewer's left lens slightly larger than the right).

Placement: lens centres on the eyes at (445,435) and (612,435) ±25px, bridge over the nose between x=530 and x=540 at y≈435, total width 132-396px; keep all pixels within x 342-738, y 348-522. Temples run back toward the hair and stop at the face edges (x≈365 left, x≈678 right); draw no temple behind the head.

Lenses: tinted lenses may be semi-opaque but must keep eyes faintly visible or fully mirrored by design; no part of the face, hair or skin drawn. Colours from the request (chrome, gold, neon pink, purple, teal, amber gradient tints), never skin tones.

12 clearly different variants covering: big 80s aviators (gold wire with brown gradient, silver with blue mirror, pink mirror), oversized round tinted shades (purple tint, amber tint, white frame with teal tint, tortoiseshell with rose tint), star-shaped sunglasses (gold glitter, hot pink, silver chrome, rainbow disco), plus one rare mirrored disco-ball pair.

Outputs: artifacts/glasses_01.png .. artifacts/glasses_12.png and artifacts/glasses.json, an array of {"file","name","weight"} with weights summing to 100, rarer (star and disco-ball pairs) lower. Write artifacts/glasses_01.png .. artifacts/glasses_12.png and artifacts/glasses.json: an array of {"file","name","weight"} with weights summing to 100, rarer lower.