Strong rule: style --- 3D Pixar ---. 3D Pixar style. The professor is doing a joyful, funny little dance. On the board behind him is written in Russian: 'Д < 0 : КОРНЕЙ НЕТ!'. Confetti is falling playfully in the classroom.
Character appearance reference (MUST match exactly):
- Профессор Архимед: A friendly, energetic math professor in 3D Pixar style. He has messy white hair, round glasses, a neat beard, wearing a tweed jacket with elbow patches and a bright bow tie. Expressive face, warm smile, animated gestures.
