Blue Descent

Create an original 4:5 vertical digital illustration titled Blue Descent. From deep inside an immense underwater limestone cavern, look upward toward a brilliant circular opening. One tiny freediver silhouette ascends toward the light, face unreadable. Layered cobalt water, volumetric sun rays, simplified graphic shapes with crisp contours and restrained detail, serene otherworldly mood, contemporary 2D game-art sensibility. No text, no logo, no watermark.