diff --git a/Events.php b/Events.php
index d992548..fd0863f 100644
--- a/Events.php
+++ b/Events.php
@@ -8,21 +8,6 @@
 
 class Events
 {
-	public static function onAdminMenuInit($event)
-    {
-		$event->sender->addItem([
-            'label' =>  Yii::t('FlexThemeModule.admin', 'Flex Theme'),
-            'url' => Url::to(['/flex-theme/config']),
-            'group' => 'manage',
-            'icon' => Icon::get('paint-brush'),
-            'isActive' => (Yii::$app->controller->module
-                    && Yii::$app->controller->module->id === 'flex-theme'
-                    && (Yii::$app->controller->id === 'page' || Yii::$app->controller->id === 'config')),
-            'sortOrder' => 900,
-            'isVisible' => true,
-        ]);
-	}
-    
     public static function onConsoleInit($event)
     {
         $event->sender->controllerMap['flex-theme'] = commands\DevController::class;
diff --git a/Module.php b/Module.php
index ac72a95..f7b5037 100644
--- a/Module.php
+++ b/Module.php
@@ -1,4 +1,5 @@
 <?php
+
 namespace humhub\modules\flexTheme;
 
 use humhub\modules\flexTheme\models\ColorSettings;
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index d6490fc..8cba312 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -1,9 +1,12 @@
 ## TBA
+**NOTE** Files in themes/FlexTheme/css now need to be writable by the PHP process (see https://docs.humhub.org/docs/admin/installation/#file-permissions)
+
+- Enh: remove variable declaration from HTML (performance improvement)
 - remove admin menu item
 - Maintainance: update for HumHub 1.15.0
 - New option: show file upload options as buttons instead of dropdown)
 - New controller action: flex-theme/rebuild - only for developping!
-- Enh: move variables to file (asset, enables browser caching)
+- Enh: various code style improvements
 
 ## 0.2.1 (22 may 2023)
 - Fix: save likeIconColor
diff --git a/module.json b/module.json
index 33d30b9..0022087 100644
--- a/module.json
+++ b/module.json
@@ -1,6 +1,6 @@
 {
     "id": "flex-theme",
-    "version": "0.2.1",
+    "version": "0.3.0-dev",
     "name": "Flex Theme",
     "description": "Flexible Theme for HumHub",
     "humhub": {
diff --git a/themes/FlexTheme/less/README.md b/themes/FlexTheme/less/README.md
deleted file mode 100644
index ab3c957..0000000
--- a/themes/FlexTheme/less/README.md
+++ /dev/null
@@ -1,18 +0,0 @@
-## How CSS of this theme works
-
-The variables.less file defines CSS variables like `var(--default)` instead of concrete colors.  
-The concrete values are defined in the HTML head, like `<style>:root {--default:#00ff00; ... }</style>`.
-
-This makes it possible to switch colors without changes to the theme.css.
- 
-### Replaced LESS functions
-
-HumHub uses LESS functions as lighten(), darken() or fade(). Those do not work when color variables contain CSS variables instead of concrete colors.  
-
-** This is currently reworked !!! ** 
-That's why the import of some files is prevented via `@prev-...` in css-vars.less.  
-Those files are replaced and the lightened, darkened and faded colors are replaced by LESS variables like `info-darken-5`.
-
-The calculation of those is done via `helpers/ColorHelper`.
-
-When the module is enabled those "special color variables" are calculated using the colors of the Community Theme as base.