[css-pseudo-4] Exclude writing-mode + direction + text-orientation from ::first-line #1097

Author: fantasai

css-pseudo-4/Overview.bs

@@ -200,14 +200,22 @@ Styling the First Line Pseudo-element</h4>
     <li>any other properties defined to apply to ''::first-line''
         by their respective specifications
   </ul>
-  User agents may apply other properties as well.
+
+  User agents may apply other properties as well except for
+  the following excluded properties:
+  <ul>
+    <li>'writing-mode'
+    <li>'direction'
+    <li>'text-orientation'
+  </ul>
 
 <h4 id="first-line-inheritance">
 Inheritance and the ''::first-line'' Pseudo-element</h4>
 
   During CSS [=inheritance=],
   the [=box fragment|fragment=] of a child that occurs on the first line
-  inherits any standard [=inherited properties=]
+  inherits any standard [=inherited properties=]--
+  except the properties excluded above--
   from the ''::first-line'' pseudo-element.
   For all other properties,
   including all [=custom properties=] [[!CSS-VARIABLES-1]],
@@ -1000,8 +1008,7 @@ Changes</h2>
   <ul>
     <li>Included spaces between the first letter and its surrounding punctuation in ''::first-letter''.
     (<a href="https://github.com/w3c/csswg-drafts/issues/5154">Issue 5154</a>)
-    <li>Define inheritance of properties from ''::first-line''
-    in terms of inheritability rather than applicability
+    <li>Adjust rules for inheritance of properties from ''::first-line''
     and define interaction with custom properties.
     (<a href="https://github.com/w3c/csswg-drafts/issues/1097">Issue 1097</a>)
     <li>Added ''::marker'' to types allowed for {{CSSPseudoElement}} interface.