{"id":"LGT-004","domain":"lighting","priority":54,"hard":false,"logic":"all","when":[{"path":"lighting.subject_background_separation","op":"lt","value":0.35}],"then":[{"op":"propose","value":"change_level_color_focus_edge_or_composition"}],"rationale":"Figure-ground separation supports legibility.","tags":["separation"],"category":"Lighting"}