[css-cascade] Fix a typo, and sync with level 5.

Author: tabatkins

css-cascade-4/Overview.bs

@@ -574,10 +574,10 @@ Used Values</h3>
 		As another example, a <code>&lt;div></code> might have a computed 'break-before' value of ''auto'',
 		but acquire a used 'break-before' value of ''break-before/page'' by propagation from its first child. [[css-break-3]]
 
-	If a property does not <dfn lt="applies to | apply to">apply to</dfn>
+	If a property does not <dfn export for=CSS id="applies-to">apply to</dfn>
 	this element or box type--
 	as noted in its “Applies to” line--
-	then does not directly take effect on that type of box or element,
+	then it does not directly take effect on that type of box or element,
 	and therefore has no <a>used value</a> for that property.
 
 	<p class='example'>

css-cascade-5/Overview.bs

@@ -455,6 +455,13 @@ Value Processing</h2>
 			for a given property on an element.
 	</ol>
 
+	Elements that are not [=connected=]
+	or are not part of the document’s [=flattened element tree=]
+	do not participate in CSS value processing,
+	and do not have [=declared=], [=cascaded=], [=specified=], [=computed=], [=used=], or [=actual=] values,
+	even if they potentially have style declarations assigned to them
+	(for example, by a <code>style</code> attribute).
+
 <h3 id="declared">
 Declared Values</h3>
 
@@ -560,10 +567,10 @@ Used Values</h3>
 		As another example, a <code>&lt;div></code> might have a computed 'break-before' value of ''auto'',
 		but acquire a used 'break-before' value of ''break-before/page'' by propagation from its first child. [[css-break-3]]
 
-	If a property does not <dfn lt="applies to | apply to">apply to</dfn>
+	If a property does not <dfn export for=CSS id="applies-to">apply to</dfn>
 	this element or box type--
 	as noted in its “Applies to” line--
-	then it has no formatting effect on that type of box or element,
+	then it does not directly take effect on that type of box or element,
 	and therefore has no <a>used value</a> for that property.
 
 	<p class='example'>