diff -r 5af9fa90cd7b -r 48b88b9c11eb src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/markup/HtmlStyle.java
--- a/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/markup/HtmlStyle.java	Wed Nov 27 12:18:40 2019 +0100
+++ b/src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/formats/html/markup/HtmlStyle.java	Wed Nov 27 13:08:16 2019 +0100
@@ -73,7 +73,9 @@
     externalLink,
     fieldDetails,
     fieldSummary,
-    fixedNav,
+    flexBox,
+    flexHeader,
+    flexContent,
     header,
     helpSection,
     hierarchy,