1. css at-rule: `@container`

2. css at-rule: `@container`: anchor position queries (`anchored()`)

3. css at-rule: `@container`: anchor position queries (`anchored()`): `fallback` feature

4. css at-rule: `@container`: anchor position queries (`anchored()`): `fallback` feature: `any` query value

5. css at-rule: `@container`: `<container-query>` is optional (allows name-only queries)

6. css at-rule: `@container`: scroll-state queries

7. css at-rule: `@container`: scroll-state queries: scrollable

8. css at-rule: `@container`: scroll-state queries: scrolled

9. css at-rule: `@container`: scroll-state queries: snapped

10. css at-rule: `@container`: scroll-state queries: stuck

11. css at-rule: `@container`: style queries for custom properties

12. css at-rule: `@container`: style queries for custom properties: range syntax

13. css at-rule: `@supports`: `named-feature()`: `named-feature(single-axis-scroll-container)`