To stage R.U.R. in Art Modern style, emphasize a minimalist and abstract approach. Use simple, geometric set designs with industrial materials, focusing on creating a mood rather than historical accuracy. Lighting should play a significant role, with strong contrasts and a limited color palette. For costumes, blend retro and modern elements to evoke the era's essence without direct replicas. Movement and staging should convey deeper emotional layers, reflecting the emotional and intellectual emphasis of the Art Modern period.