Art style: Vintage Cel Animation.
Full-length view, the entire figure visible from head to feet, standing upright, centered — Lena, a thoughtful, cautious straight-A schoolgirl around ten years old. Slim, neat build with fair skin and rosy cheeks. Straight ash-blonde hair tied in two tidy braids with small dark-red ribbons, a straight fringe over her forehead, and round thin-rimmed glasses framing calm, attentive grey eyes. She wears a crisp school uniform: a white blouse with a rounded collar, a burgundy pinafore dress with a pleated skirt, white knee-high socks, and polished black Mary-Jane shoes. A small satchel-style backpack rests on her back and she holds a closed textbook to her chest. Composed, serious little smile, posture upright and careful. Behind her, a tidy classroom with wooden desks, a chalkboard and tall windows.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
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.
