Strong rule: style --- 3D Pixar ---. 3D Pixar style. The professor stands at the front of the classroom, waving goodbye. On the board behind him is written in large Russian letters: 'УДАЧИ!'. Bright, sunny day outside the classroom windows. Happy, vibrant colors.
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.
