How does most of the drama in casablanca come from the cinematic devices opposed to the acting?

In "Casablanca," much of the drama arises from cinematic devices such as lighting, camera angles, and framing, which create tension and highlight emotional stakes. The use of shadows and close-ups emphasizes characters' inner conflicts and moral dilemmas, enhancing the narrative's emotional depth. Additionally, the film's iconic score and strategic pacing heighten the suspense and emotional resonance, often overshadowing the performances. Together, these elements craft a rich atmosphere that drives the drama forward, making it integral to the film's impact.