Untitled

------------------- header (accent stripe + topic) -------------------
| Col1 (2/3)                      | Col2 (1/3)                     |
| - Definition (short)            | [Icon] Example box             |
| - 3 bullets (characteristics)   | Callout: Activity / question   |
| - small image (diagram)         | page number / small tip        |
---------------------------------------------------------------------
footer: source / group name