Art style: Vintage Cel Animation.
Full-length view, the entire figure visible from head to feet, standing upright, figure centered in a bright school classroom with chalkboard and desks filling the sides. Lena is a thoughtful, careful straight-A schoolgirl about eleven years old, slender and neat, with fair skin and a calm, attentive expression, faint intelligent gaze behind round thin-rimmed glasses. Her light-brown hair is tidily parted and pulled into two smooth braids tied with dark-blue ribbons. She wears a crisp school uniform: white collared blouse under a navy pinafore dress with pleated skirt, a small red brooch, white knee socks, and polished black Mary-Jane shoes. She holds a hardcover book and pencil against her chest, standing straight with poised, slightly cautious posture, one hand adjusting her glasses.
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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 in the following art style:
Hand-painted 2D cel animation featuring a nostalgic, mid-20th-century palette of muted blues, deep reds, and earthy tones, characteristic of traditional European animated films.
Every surface, skin, fabric, material, and environmental element must be rendered in this idiom.
