Style Rules:
- Color palette: dominated by [hex] + accent [hex], ratio ≥ 7:3
- Light source: specify type (rim/fill/key), angle, intensity %
- Shadow depth: percentage of frame in shadow
Example
- Palette: teal #0f3a3d dominant + warm orange #e08a3c accent (≈8:2 ratio).
- Light source: key from upper-left 45°, intensity 80%; rim from back-right, intensity 20%.
- Shadow depth: ~55% of the frame in shadow.