| Layer | Role |
|---|---|
| Section chrome | Title, drag handle, remove control |
| Inner wrapper | Theme container |
| Your root | Plugin markup |
Constraints: contained width, min-width: 0 on flex children, max-width: 100% on media and tables.
Works well: short lists, stat rows, one scrollable table.
Avoid: fixed widths over ~300px in aside, float layouts, large negative margins.