Family and Dog in Ice Cave Movie Poster AI Image Prompt

A cinematic, vertical movie poster featuring a family of four and their dog standing inside a massive, ancient ice cave. The environment is dominated by towering, translucent blue glacier crystals that form the walls and ceiling, with bright light filtering through from above. Etched into several large crystal pillars are glowing white runic symbols, including suns, triangles, and wavy lines. In the foreground left, a golden retriever sits looking up to the right. Beside it stands a young woman with long brown hair wearing a patterned knit sweater and dark jeans, hands in pockets, gazing upward. Behind her is a man with a beard wearing a black beanie and heavy winter jacket. To the right are two children: a boy in a grey beanie and puffer jacket, and a girl in a cream beanie and scarf, both looking up in awe. Snowflakes drift through the air, catching the light. The color palette is cool blues, whites, and greys, contrasting with the warm tones of the dog's fur and the woman's sweater.