[css-contain-3] Draft logic for global at-rules in container queries #6827

Author: mirisuzanne

css-contain-3/Overview.bs

@@ -660,8 +660,14 @@ Container Queries: the ''@container'' rule</h3>
 	so it is not always possible to merge the individual <<container-condition>>s
 	into a single query.
 
+	Global, name-defining [=at-rules=]
+	such as ''@keyframes'' or ''@font-face'' or ''@layer''
+	that are defined inside [=container queries=]
+	are not constrained by the [=container query=] conditions.
+
 	Issue(6827): What happens to other @rules inside @container?
 
+
 <h3 id="animated-containers">
 Animated Containers</h3>