Cinematic Sci-Fi Astronaut Facing Megatsunami

Full prompt

A cinematic sci-fi documentary-style film still depicting an astronaut in a white spacesuit standing alone in calm, knee-deep ocean waters, holding a helmet at the waist while gazing pensively toward the horizon. In the far distance, a colossal monolithic tidal wave rising thousands of meters high approaches, evoking immense megalohydrophobia and dread. An overcast, cool gray sky diffuses soft, chilly illumination with deep cyan-blue shadows. Captured with a low horizon line and a wide perspective using a high-end cinema camera and prime lens, featuring fine 35mm film grain, low saturation, balanced contrast, and quiet existential solitude, without text or watermarks, 9:16 aspect ratio.