[css-contain-3] No Cascade-dependent keywords in style queries

Author: mirisuzanne

css-contain-3/Overview.bs

@@ -882,6 +882,13 @@ Style Container Features</h3>
 	is the same as for [=CSS feature queries=].
 	(See ''@supports''. [[!CSS-CONDITIONAL-3]])
 
+	[=Cascade-dependent keywords=], such as ''revert'' and ''revert-layer'',
+	are not allowed as values in a [=style feature=], and cause the
+	[=container style query=] to be false.
+
+	Note: The remaining non-cascade-dependent [=CSS-wide keywords=]
+	are [=computed value|computed=] with respect to the [=query container=],
+	the same as other values.
 
 <h2 id="container-lengths">
 Container Relative Lengths: the ''cqw'', ''cqh'', ''cqi'', ''cqb'', ''cqmin'', ''cqmax'' units</h2>
@@ -1015,6 +1022,9 @@ Changes since the 21 December 2021 First Public Working Draft</h3>
 
 	Significant changes since the <a href="https://www.w3.org/TR/2021/WD-css-contain-3-20211221/">21 December 2021 First Public Working Draft</a> include:
 
+	* [=Cascade-dependent keywords=] are not allowed as values in a
+		[=style feature=], and cause the [=container style query=] to be false.
+		(<a href="https://github.com/w3c/csswg-drafts/issues/7080">Issue 7080</a>)
 	* Change the initial value of 'container-type' to be ''style''.
 		(<a href="https://github.com/w3c/csswg-drafts/issues/6393">Issue 6393</a>)
 	* Remove the block-size value from 'container-type',