fix: @container class safelisting

Author: cossssmin

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [6.0.0-12] - 2025-07-16
+
+### Fixed
+
 ## [6.0.0-11] - 2025-07-16
 
 ### Fixed

src/transformers/inline.js

@@ -62,7 +62,7 @@ export async function inline(html = '', options = {}) {
       'lang', // Fenced code blocks
       'ShadowHTML', // Superhuman
       'spark', // Spark
-      'at-', // Safe class names for container queries
+      '.at-', // Safe class names for container queries
     ],
   ])
 

src/transformers/purge.js

@@ -26,7 +26,7 @@ const posthtmlPlugin = options => tree => {
     '*lang*', // Fenced code blocks
     '*ShadowHTML*', // Superhuman
     '*spark*', // Spark
-    '*at-*', // Safe class names for container queries
+    '.at-*', // Safe class names for container queries
   ]
 
   const defaultOptions = {