1. Define the container using `container-type: inline-size`.
2. Implement container queries using `@container` to adjust styles based on container width.
3. Use `cqi` and `cqb` units for sizing elements relative to the container.
4. Apply `clamp()` for fluid typography, ensuring accessibility with `rem` units.
5. Implement a mobile-first approach, adding complexity with `min-width` media queries.
6. Use CSS Grid patterns like `auto-fit` and `auto-fill` for responsive layouts.
7. Test on various devices and screen sizes.