Art style: Animación 3D estilo Pixar infantil.
Sirena sonriente sosteniendo un pastel de cumpleaños azul decorado con estrellas de mar y velas encendidas. Fondo submarino con corales vibrantes, peces amarillos y luz solar filtrándose desde la superficie. Composición centrada, ambiente festivo y mágico.
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FINAL STYLE ENFORCEMENT (this is the authoritative rendering directive — it overrides any style wording elsewhere in the prompt):
Render this image entirely in "Animación 3D estilo Pixar infantil" style. Match the lighting grammar, material response, colour science, level of realism / stylisation, line weight, and shading model typical of "Animación 3D estilo Pixar infantil". Keep the subject, composition, camera angle, lighting direction, and colour palette from the description above — but EVERY surface, skin, fabric, material, and environmental element must be rendered in the "Animación 3D estilo Pixar infantil" idiom, not in any other medium.
