diff --git a/Taking Flight with Tailwind CSS/main.style b/Taking Flight with Tailwind CSS/main.style
index 1ec6e4a..41269f5 100644
--- a/Taking Flight with Tailwind CSS/main.style	
+++ b/Taking Flight with Tailwind CSS/main.style	
@@ -116,8 +116,9 @@ styles:
         parent: normal
         textColor: #66666
 
-    centered:
+    centred:
         alignment: TA_CENTER
+        parent: normal
 
     centredtitle:
         alignment: TA_CENTER
diff --git a/Taking Flight with Tailwind CSS/sections/interaction-states.rst b/Taking Flight with Tailwind CSS/sections/interaction-states.rst
index dd5766e..920136d 100644
--- a/Taking Flight with Tailwind CSS/sections/interaction-states.rst	
+++ b/Taking Flight with Tailwind CSS/sections/interaction-states.rst	
@@ -4,6 +4,9 @@
 
 Interaction states
 
+
+.. class:: centred
+
 hover, focus, active, disabled, visited,
 group-hover, focus-within,
 first-child, last-child...