YouTube THUMBNAIL TEMPLATE, 16:9, kids cartoon style matching the reference character. Adorable little girl character "Pupsa" (use the uploaded reference) on the right side with a big excited expression pointing toward the left. Bright underwater treasure-hunt scene: turquoise water, sunbeams, a glowing treasure chest, colorful seashells and bubbles, pink-and-gold accents. Large clean empty area on the left for a bold episode title. High contrast, vibrant, eye-catching, glossy soft 3D Pixar-like render, very cute, safe-for-kids, no text.
