Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)

You are free to:
- Share — copy and redistribute the material in any medium or format
- Adapt — remix, transform, and build upon the material

Under the following terms:
- Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made.
- NonCommercial — You may not use the material for commercial purposes.

Full license text: https://creativecommons.org/licenses/by-nc/4.0/legalcode