diff --git a/Classes/Compiler/ScssCompiler.php b/Classes/Compiler/ScssCompiler.php
new file mode 100644
index 0000000..ab200d8
--- /dev/null
+++ b/Classes/Compiler/ScssCompiler.php
@@ -0,0 +1,87 @@
+<?php
+namespace WapplerSystems\WsScss\Compiler;
+
+
+use TYPO3\CMS\Core\Core\Environment;
+use TYPO3\CMS\Core\Utility\ExtensionManagementUtility;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+
+class ScssCompiler
+{
+
+    /**
+     * Compiling Scss with scss
+     *
+     * @param string $scssFilename Existing scss file absolute path
+     * @param string $cssFilename File to be written with compiled CSS
+     * @param array $vars Variables to compile
+     * @param boolean $showLineNumber Show line numbers
+     * @param string $formatter name
+     * @param string $cssRelativeFilename
+     * @param boolean $useSourceMap Use SourceMap
+     * @return string
+     * @throws \BadFunctionCallException
+     * @throws \ScssPhp\ScssPhp\Exception\CompilerException
+     */
+    public static function compileScss(
+        string $scssFilename,
+        string $cssFilename,
+        array $vars = [],
+        bool $showLineNumber = false,
+        $formatter = null,
+        $cssRelativeFilename = null,
+        bool $useSourceMap = false): string {
+
+        if (!class_exists(\ScssPhp\ScssPhp\Version::class, true)) {
+            $extPath = ExtensionManagementUtility::extPath('ws_scss');
+            require_once $extPath . 'Resources/Private/scssphp/scss.inc.php';
+        }
+        $sitePath = Environment::getPublicPath() . '/';
+
+        $cacheDir = $sitePath . 'typo3temp/assets/css/cache/';
+
+        if (!is_dir($cacheDir)) {
+            GeneralUtility::mkdir_deep($cacheDir);
+        }
+
+        if (!is_writable($cacheDir)) {
+            // TODO: Error message
+            return '';
+        }
+
+        $cacheOptions = [
+            'cacheDir' => $cacheDir,
+            'prefix' => md5($cssFilename),
+        ];
+        GeneralUtility::mkdir_deep($cacheOptions['cacheDir']);
+        $parser = new \ScssPhp\ScssPhp\Compiler($cacheOptions);
+        if (file_exists($scssFilename)) {
+
+            $parser->setVariables($vars);
+
+            if ($showLineNumber) {
+                $parser->setLineNumberStyle(\ScssPhp\ScssPhp\Compiler::LINE_COMMENTS);
+            }
+            if ($formatter !== null) {
+                $parser->setFormatter($formatter);
+            }
+
+            if ($useSourceMap) {
+                $parser->setSourceMap(\ScssPhp\ScssPhp\Compiler::SOURCE_MAP_INLINE);
+
+                $parser->setSourceMapOptions([
+                    'sourceMapWriteTo' => $cssFilename . '.map',
+                    'sourceMapURL' => $cssRelativeFilename . '.map',
+                    'sourceMapBasepath' => $sitePath,
+                    'sourceMapRootpath' => '/',
+                ]);
+            }
+
+            $css = $parser->compile('@import "' . $scssFilename . '";');
+            GeneralUtility::writeFile($cssFilename, $css);
+            return $css;
+        }
+        return '';
+    }
+
+}
diff --git a/Classes/Compiler/ScssResolver.php b/Classes/Compiler/ScssResolver.php
new file mode 100644
index 0000000..50fad93
--- /dev/null
+++ b/Classes/Compiler/ScssResolver.php
@@ -0,0 +1,206 @@
+<?php
+
+namespace WapplerSystems\WsScss\Compiler;
+
+use TYPO3\CMS\Core\Cache\Frontend\FrontendInterface;
+use TYPO3\CMS\Core\Core\Environment;
+use TYPO3\CMS\Core\Log\Logger;
+use TYPO3\CMS\Core\Log\LogManager;
+use TYPO3\CMS\Core\Utility\DebugUtility;
+use TYPO3\CMS\Core\Utility\ExtensionManagementUtility;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+
+class ScssResolver
+{
+
+    /**
+     * @var FrontendInterface
+     */
+    private $cache;
+
+    private static $defaultOutputDir = 'typo3temp/assets/css/';
+
+    private static $visitedFiles = [];
+
+    public function __construct(FrontendInterface $cache) {
+        $this->cache = $cache;
+    }
+
+    private static function calcCacheKey(string $cssRelativeFilename) {
+        return hash('sha1', $cssRelativeFilename);
+    }
+
+    /**
+     * Calculating content hash to detect changes
+     *
+     * @param string $scssFilename Existing scss file absolute path
+     * @param string $vars
+     * @return string
+     */
+    protected function calculateContentHash(string $scssFilename, string $vars = ''): string {
+        if (\in_array($scssFilename, self::$visitedFiles, true)) {
+            return '';
+        }
+        self::$visitedFiles[] = $scssFilename;
+
+        $content = file_get_contents($scssFilename);
+        $pathinfo = pathinfo($scssFilename);
+
+        $hash = hash('sha1', $content);
+        if ($vars !== '') {
+            $hash = hash('sha1', $hash . $vars);
+        } // hash variables too
+
+        $imports = self::collectImports($content);
+        foreach ($imports as $import) {
+            $hashImport = '';
+
+
+            if (file_exists($pathinfo['dirname'] . '/' . $import . '.scss')) {
+                $hashImport = $this->calculateContentHash($pathinfo['dirname'] . '/' . $import . '.scss');
+            } else {
+                $parts = explode('/', $import);
+                $filename = '_' . array_pop($parts);
+                $parts[] = $filename;
+                if (file_exists($pathinfo['dirname'] . '/' . implode('/', $parts) . '.scss')) {
+                    $hashImport = $this->calculateContentHash($pathinfo['dirname'] . '/' . implode('/',
+                            $parts) . '.scss');
+                }
+            }
+            if ($hashImport !== '') {
+                $hash = hash('sha1', $hash . $hashImport);
+            }
+        }
+
+        return $hash;
+    }
+
+    /**
+     * Collect all @import files in the given content.
+     *
+     * @param string $content
+     * @return array
+     */
+    private static function collectImports(string $content): array {
+        $matches = [];
+        $imports = [];
+
+        preg_match_all('/@import([^;]*);/', $content, $matches);
+
+        foreach ($matches[1] as $importString) {
+            $files = explode(',', $importString);
+
+            array_walk($files, static function (string &$file) {
+                $file = trim($file, " \t\n\r\0\x0B'\"");
+            });
+
+            $imports = array_merge($imports, $files);
+        }
+
+        return $imports;
+    }
+
+    public function resolve(string $file, $outputDir = null, $formatter = null, array $variables = [],  $showLineNumber = false, $useSourceMap = false, $outputFile = null, $inline = false): ?array {
+        $sitePath = Environment::getPublicPath() . '/';
+        $pathInfo = pathinfo($file);
+        $filename = $pathInfo['filename'];
+        if (empty($outputDir)) {
+            $outputDir = self::$defaultOutputDir;
+        }
+
+        if ($outputFile !== null) {
+            $outputDir = \dirname($outputFile);
+            $filename = basename($outputFile);
+        }
+
+        $outputDir = (substr($outputDir, -1) === '/') ? $outputDir : $outputDir . '/';
+
+        if (!strcmp(substr($outputDir, 0, 4), 'EXT:')) {
+            [$extKey, $script] = explode('/', substr($outputDir, 4), 2);
+            if ($extKey && ExtensionManagementUtility::isLoaded($extKey)) {
+                $extPath = ExtensionManagementUtility::extPath($extKey);
+                $outputDir = substr($extPath, \strlen($sitePath)) . $script;
+            }
+        }
+
+
+        $scssFilename = GeneralUtility::getFileAbsFileName($file);
+
+        // create filename - hash is important due to the possible
+        // conflicts with same filename in different folders
+        GeneralUtility::mkdir_deep($sitePath . $outputDir);
+        $fileEnding = (substr($filename,-4) === '.css') ? '' : '.css';
+        if ($outputFile === null) {
+            $variablesCount = \count($variables);
+            $variablesHash = $variablesCount > 0 ? hash('md5', implode(',', $variables)) : null;
+            $variablesHashString = $variablesCount > 0 ? '_' . $variablesHash : '';
+            $fileNameOutputString = ($outputDir === self::$defaultOutputDir) ? '_' . hash('sha1', $file) : $variablesHashString;
+
+            $cssRelativeFilename = $outputDir . $filename . $fileNameOutputString . $fileEnding;
+        } else {
+            $cssRelativeFilename = $outputDir . $filename . $fileEnding;
+        }
+
+
+        $cssFilename = $sitePath . $cssRelativeFilename;
+
+        $cacheKey = self::calcCacheKey($cssRelativeFilename);
+        $contentHash = $this->calculateContentHash($scssFilename, implode(',', $variables));
+        if ($showLineNumber) {
+            $contentHash .= 'l1';
+        }
+        if ($useSourceMap) {
+            $contentHash .= 'sm';
+        }
+        $contentHash .= $formatter;
+
+        $contentHashCache = '';
+        if ($this->cache->has($cacheKey)) {
+            $contentHashCache = $this->cache->get($cacheKey);
+        }
+
+
+        $css = $this->compile($scssFilename, $cssFilename, $contentHashCache, $contentHash, $cacheKey, $variables, $showLineNumber, $formatter, $cssRelativeFilename, $useSourceMap);
+        // error
+        if ($css === null) {
+            return null;
+        }
+        if ($inline) {
+            if ($css === '') {
+                $css = file_get_contents($cssFilename);
+            }
+            return [$cssRelativeFilename, $css];
+        }
+        return [$cssRelativeFilename, null];
+    }
+
+    private function compile(string $scssFilename,
+                       string $cssFilename,
+                       string $contentHashCache,
+                       string $contentHash,
+                       string $cacheKey,
+                       array $variables = [],
+                       bool $showLineNumber = false,
+                       $formatter = null,
+                       $cssRelativeFilename = null,
+                       bool $useSourceMap = false): ?string {
+        $css = '';
+
+        try {
+            if ($contentHashCache === '' || $contentHashCache !== $contentHash) {
+                $css = ScssCompiler::compileScss($scssFilename, $cssFilename, $variables, $showLineNumber, $formatter, $cssRelativeFilename, $useSourceMap);
+
+                $this->cache->set($cacheKey, $contentHash, ['scss'], 0);
+            }
+            return $css;
+        } catch (\Exception $ex) {
+            DebugUtility::debug($ex->getMessage());
+
+            /** @var $logger Logger */
+            $logger = GeneralUtility::makeInstance(LogManager::class)->getLogger(__CLASS__);
+            $logger->error($ex->getMessage());
+        }
+        return null;
+    }
+
+}
diff --git a/Classes/EventListener/CompileScssAssets.php b/Classes/EventListener/CompileScssAssets.php
new file mode 100644
index 0000000..e93a1b7
--- /dev/null
+++ b/Classes/EventListener/CompileScssAssets.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace WapplerSystems\WsScss\EventListener;
+
+use \TYPO3\CMS\Core\Page\Event\BeforeStylesheetsRenderingEvent;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+use WapplerSystems\WsScss\Compiler\ScssResolver;
+
+class CompileScssAssets
+{
+
+    public function __invoke(BeforeStylesheetsRenderingEvent $event): void {
+        if ($event->isInline()) {
+            return;
+        }
+        $assetCollector = $event->getAssetCollector();
+        $assets = $assetCollector->getStyleSheets($event->isPriority());
+
+        foreach ($assets as $identifier => $asset) {
+            if (!empty($asset['source'])) {
+                $pathInfo = pathinfo($asset['source']);
+                if ($pathInfo['extension'] === 'scss') {
+                    $assetCollector->removeStyleSheet($identifier);
+                    /** @var ScssResolver $scssResolver */
+                    $scssResolver = GeneralUtility::makeInstance(ScssResolver::class);
+                    $resolved = $scssResolver->resolve(
+                        $asset['source'],
+                        null,
+                        'WapplerSystems\WsScss\Formatter\Autoprefixer',
+                        [],
+                        false,
+                        false,
+                        null,
+                        false);
+                    if ($resolved === null) {
+                        // error remove
+                        return;
+                    }
+                    $assetCollector->addStyleSheet($identifier, $resolved[0], $asset['attributes'], $asset['options']);
+                }
+            }
+        }
+    }
+}
diff --git a/Classes/Hooks/RenderPreProcessorHook.php b/Classes/Hooks/RenderPreProcessorHook.php
index 83b1f70..d9208a7 100644
--- a/Classes/Hooks/RenderPreProcessorHook.php
+++ b/Classes/Hooks/RenderPreProcessorHook.php
@@ -22,15 +22,10 @@
  *  This copyright notice MUST APPEAR in all copies of the script!
  ***************************************************************/
 
-use TYPO3\CMS\Core\Cache\Backend\FileBackend;
-use TYPO3\CMS\Core\Cache\CacheManager;
-use TYPO3\CMS\Core\Log\Logger;
 use TYPO3\CMS\Core\Page\PageRenderer;
-use TYPO3\CMS\Core\Utility\DebugUtility;
-use TYPO3\CMS\Core\Utility\ExtensionManagementUtility;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
-use TYPO3\CMS\Core\Log\LogManager;
 use TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer;
+use WapplerSystems\WsScss\Compiler\ScssResolver;
 
 /**
  * Hook to preprocess scss files
@@ -42,9 +37,7 @@
 class RenderPreProcessorHook
 {
 
-    private static $visitedFiles = [];
 
-    private $variables = [];
 
     /**
      * @var \TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer
@@ -70,8 +63,7 @@ public function renderPreProcessorProc(&$params, PageRenderer $pagerenderer)
         }
 
         $defaultOutputDir = 'typo3temp/assets/css/';
-
-        $sitePath = \TYPO3\CMS\Core\Core\Environment::getPublicPath() . '/';
+        $variables = [];
 
         $setup = $GLOBALS['TSFE']->tmpl->setup;
         if (\is_array($setup['plugin.']['tx_wsscss.']['variables.'])) {
@@ -94,8 +86,6 @@ public function renderPreProcessorProc(&$params, PageRenderer $pagerenderer)
             $this->variables = $parsedTypoScriptVariables;
         }
 
-        $variablesHash = \count($this->variables) > 0 ? hash('md5', implode(',', $this->variables)) : null;
-
         $filePathSanitizer = GeneralUtility::makeInstance(\TYPO3\CMS\Frontend\Resource\FilePathSanitizer::class);
 
         // we need to rebuild the CSS array to keep order of CSS files
@@ -111,7 +101,6 @@ public function renderPreProcessorProc(&$params, PageRenderer $pagerenderer)
             $outputDir = $defaultOutputDir;
 
             $inlineOutput = false;
-            $filename = $pathInfo['filename'];
             $formatter = null;
             $showLineNumber = false;
             $useSourceMap = false;
@@ -139,78 +128,24 @@ public function renderPreProcessorProc(&$params, PageRenderer $pagerenderer)
                     }
                 }
             }
-            if ($outputFile !== null) {
-                $outputDir = \dirname($outputFile);
-                $filename = basename($outputFile);
-            }
-
-            $outputDir = (substr($outputDir, -1) === '/') ? $outputDir : $outputDir . '/';
-
-            if (!strcmp(substr($outputDir, 0, 4), 'EXT:')) {
-                [$extKey, $script] = explode('/', substr($outputDir, 4), 2);
-                if ($extKey && ExtensionManagementUtility::isLoaded($extKey)) {
-                    $extPath = ExtensionManagementUtility::extPath($extKey);
-                    $outputDir = substr($extPath, \strlen($sitePath)) . $script;
-                }
-            }
-
-
-            $scssFilename = GeneralUtility::getFileAbsFileName($conf['file']);
-
-            // create filename - hash is important due to the possible
-            // conflicts with same filename in different folders
-            GeneralUtility::mkdir_deep($sitePath . $outputDir);
-            if ($outputFile === null) {
-                $cssRelativeFilename = $outputDir . $filename . (($outputDir === $defaultOutputDir) ? '_' . hash('sha1',
-                            $file) : (\count($this->variables) > 0 ? '_' . $variablesHash : '')) . ((substr($filename,-4) === '.css') ? '' : '.css');
-            } else {
-                $cssRelativeFilename = $outputDir . $filename . ((substr($filename,-4) === '.css') ? '' : '.css');
-            }
-            $cssFilename = $sitePath . $cssRelativeFilename;
-
-            /** @var FileBackend $cache */
-            $cache = GeneralUtility::makeInstance(CacheManager::class)->getCache('ws_scss');
 
-            $cacheKey = hash('sha1', $cssRelativeFilename);
-            $contentHash = $this->calculateContentHash($scssFilename, implode(',', $this->variables));
-            if ($showLineNumber) {
-                $contentHash .= 'l1';
-            }
-            if ($useSourceMap) {
-                $contentHash .= 'sm';
-            }
-            $contentHash .= $formatter;
+            /** @var ScssResolver $scssResolver */
+            $scssResolver = GeneralUtility::makeInstance(ScssResolver::class);
+            $resolved = $scssResolver->resolve($conf['file'], $outputDir, $formatter, $variables,  $showLineNumber, $useSourceMap, $outputFile, $inlineOutput);
 
-            $contentHashCache = '';
-            if ($cache->has($cacheKey)) {
-                $contentHashCache = $cache->get($cacheKey);
+            if ($resolved === null) {
+                // error in compiling
+                // TODO unset all
             }
 
-            $css = '';
+            $cssRelativeFilename = $resolved[0];
 
-            try {
-                if ($contentHashCache === '' || $contentHashCache !== $contentHash) {
-                    $css = $this->compileScss($scssFilename, $cssFilename, $this->variables, $showLineNumber, $formatter, $cssRelativeFilename, $useSourceMap);
-
-                    $cache->set($cacheKey, $contentHash, ['scss'], 0);
-                }
-            } catch (\Exception $ex) {
-                DebugUtility::debug($ex->getMessage());
-
-                /** @var $logger Logger */
-                $logger = GeneralUtility::makeInstance(LogManager::class)->getLogger(__CLASS__);
-                $logger->error($ex->getMessage());
-            }
 
             if ($inlineOutput) {
                 unset($cssFiles[$cssRelativeFilename]);
-                if ($css === '') {
-                    $css = file_get_contents($cssFilename);
-                }
-
                 // TODO: compression
                 $params['cssInline'][$cssRelativeFilename] = [
-                    'code' => $css,
+                    'code' => $cssRelativeFilename[1],
                 ];
             } else {
                 $cssFiles[$cssRelativeFilename] = $params['cssFiles'][$file];
@@ -221,146 +156,4 @@ public function renderPreProcessorProc(&$params, PageRenderer $pagerenderer)
         }
         $params['cssFiles'] = $cssFiles;
     }
-
-    /**
-     * Compiling Scss with scss
-     *
-     * @param string $scssFilename Existing scss file absolute path
-     * @param string $cssFilename File to be written with compiled CSS
-     * @param array $vars Variables to compile
-     * @param boolean $showLineNumber Show line numbers
-     * @param string $formatter name
-     * @param string $cssRelativeFilename
-     * @param boolean $useSourceMap Use SourceMap
-     * @return string
-     * @throws \BadFunctionCallException
-     */
-    protected function compileScss($scssFilename, $cssFilename, $vars = [], $showLineNumber = false, $formatter = null, $cssRelativeFilename = null, $useSourceMap = false): string
-    {
-
-        $sitePath = \TYPO3\CMS\Core\Core\Environment::getPublicPath() . '/';
-        if (!class_exists(\ScssPhp\ScssPhp\Version::class, true)) {
-            $extPath = ExtensionManagementUtility::extPath('ws_scss');
-            require_once $extPath . 'Resources/Private/scssphp/scss.inc.php';
-        }
-
-        $cacheDir = $sitePath . 'typo3temp/assets/css/cache/';
-
-        if (!is_dir($cacheDir)) {
-            GeneralUtility::mkdir_deep($cacheDir);
-        }
-
-        if (!is_writable($cacheDir)) {
-            // TODO: Error message
-            return '';
-        }
-
-        $cacheOptions = [
-            'cacheDir' => $cacheDir,
-            'prefix' => md5($cssFilename),
-        ];
-        $parser = new \ScssPhp\ScssPhp\Compiler($cacheOptions);
-        if (file_exists($scssFilename)) {
-
-            $parser->setVariables($vars);
-
-            if ($showLineNumber) {
-                $parser->setLineNumberStyle(\ScssPhp\ScssPhp\Compiler::LINE_COMMENTS);
-            }
-            if ($formatter !== null) {
-                $parser->setFormatter($formatter);
-            }
-
-            if ($useSourceMap) {
-                $parser->setSourceMap(\ScssPhp\ScssPhp\Compiler::SOURCE_MAP_INLINE);
-
-                $parser->setSourceMapOptions([
-                    'sourceMapWriteTo' => $cssFilename . '.map',
-                    'sourceMapURL' => $cssRelativeFilename . '.map',
-                    'sourceMapBasepath' => $sitePath,
-                    'sourceMapRootpath' => '/',
-                ]);
-            }
-
-            $css = $parser->compile('@import "' . $scssFilename . '";');
-
-            GeneralUtility::writeFile($cssFilename, $css);
-
-            return $css;
-        }
-
-        return '';
-    }
-
-    /**
-     * Calculating content hash to detect changes
-     *
-     * @param string $scssFilename Existing scss file absolute path
-     * @param string $vars
-     * @return string
-     */
-    protected function calculateContentHash($scssFilename, $vars = ''): string
-    {
-        if (\in_array($scssFilename, self::$visitedFiles, true)) {
-            return '';
-        }
-        self::$visitedFiles[] = $scssFilename;
-
-        $content = file_get_contents($scssFilename);
-        $pathinfo = pathinfo($scssFilename);
-
-        $hash = hash('sha1', $content);
-        if ($vars !== '') {
-            $hash = hash('sha1', $hash . $vars);
-        } // hash variables too
-
-        $imports = $this->collectImports($content);
-        foreach ($imports as $import) {
-            $hashImport = '';
-
-
-            if (file_exists($pathinfo['dirname'] . '/' . $import . '.scss')) {
-                $hashImport = $this->calculateContentHash($pathinfo['dirname'] . '/' . $import . '.scss');
-            } else {
-                $parts = explode('/', $import);
-                $filename = '_' . array_pop($parts);
-                $parts[] = $filename;
-                if (file_exists($pathinfo['dirname'] . '/' . implode('/', $parts) . '.scss')) {
-                    $hashImport = $this->calculateContentHash($pathinfo['dirname'] . '/' . implode('/',
-                            $parts) . '.scss');
-                }
-            }
-            if ($hashImport !== '') {
-                $hash = hash('sha1', $hash . $hashImport);
-            }
-        }
-
-        return $hash;
-    }
-
-    /**
-     * Collect all @import files in the given content.
-     *
-     * @param string $content
-     * @return array
-     */
-    protected function collectImports(string $content): array
-    {
-        $matches = [];
-        $imports = [];
-
-        preg_match_all('/@import([^;]*);/', $content, $matches);
-
-        foreach ($matches[1] as $importString) {
-            $files = explode(',', $importString);
-
-            array_walk($files, function(string &$file) {
-                $file = trim($file, " \t\n\r\0\x0B'\"");
-            });
-
-            $imports = array_merge($imports, $files);
-        }
-
-        return $imports;
-    }
 }
diff --git a/Configuration/Services.yaml b/Configuration/Services.yaml
new file mode 100644
index 0000000..914c12c
--- /dev/null
+++ b/Configuration/Services.yaml
@@ -0,0 +1,23 @@
+services:
+  cache.ws_scss:
+    class: TYPO3\CMS\Core\Cache\Frontend\FrontendInterface
+    factory: [ '@TYPO3\CMS\Core\Cache\CacheManager', 'getCache' ]
+    arguments: [ 'ws_scss' ]
+
+  _defaults:
+    autowire: true
+    autoconfigure: true
+    public: true
+
+  WapplerSystems\WsScss\:
+    resource: '../Classes/*'
+
+  WapplerSystems\WsScss\EventListener\CompileScssAssets:
+    tags:
+      - name: event.listener
+        identifier: 'ws-sass/compileScssListener'
+        event: TYPO3\CMS\Core\Page\Event\BeforeStylesheetsRenderingEvent
+
+  WapplerSystems\WsScss\Compiler\ScssResolver:
+    arguments:
+      $cache: '@cache.ws_scss'
diff --git a/Resources/Private/csscrush/.eslintrc.js b/Resources/Private/csscrush/.eslintrc.js
new file mode 100644
index 0000000..d9ee412
--- /dev/null
+++ b/Resources/Private/csscrush/.eslintrc.js
@@ -0,0 +1,107 @@
+/*eslint sort-keys: 2*/
+/*eslint object-property-newline: 2*/
+/*eslint quote-props: [2, "consistent"]*/
+
+module.exports = {
+    env: {
+        es6: true,
+        node: true,
+    },
+    extends: 'eslint:recommended',
+    parserOptions: {
+        ecmaVersion: 9,
+    },
+    rules: {
+        'array-bracket-spacing': [2, 'never'],
+        'array-element-newline': [2, 'consistent'],
+        'arrow-parens': [2, 'as-needed'],
+        'arrow-spacing': 2,
+        'brace-style': [2, 'stroustrup'],
+        'camelcase': [2, {
+            ignoreDestructuring: true,
+            properties: 'never',
+        }],
+        'comma-dangle': [2, {
+            arrays: 'always-multiline',
+            functions: 'never',
+            objects: 'always-multiline',
+        }],
+        'comma-spacing': [2, {
+            after: true,
+            before: false,
+        }],
+        'curly': 2,
+        'eol-last': [2, 'always'],
+        'eqeqeq': 2,
+        'key-spacing': [2, {
+            afterColon: true,
+            beforeColon: false,
+        }],
+        'keyword-spacing': 2,
+        'linebreak-style': [2, 'unix'],
+        'multiline-comment-style': [2, 'starred-block'],
+        'no-console': 2,
+        'no-dupe-keys': 2,
+        'no-else-return': 2,
+        'no-empty': [2, {
+            allowEmptyCatch: true,
+        }],
+        'no-lonely-if': 2,
+        'no-multi-spaces': 2,
+        'no-multiple-empty-lines': [2, {
+            max: 2,
+            maxBOF: 1,
+            maxEOF: 1,
+        }],
+        'no-new-object': 2,
+        'no-template-curly-in-string': 2,
+        'no-tabs': 2,
+        'no-throw-literal': 2,
+        'no-trailing-spaces': 2,
+        'no-unneeded-ternary': 2,
+        'no-unused-expressions': [2, {allowShortCircuit: true}],
+        'no-unused-vars': [2, {
+            args: 'all',
+            argsIgnorePattern: '^(req|res|next)$|^_',
+            varsIgnorePattern: '^_$',
+        }],
+        'no-useless-call': 2,
+        'no-useless-concat': 2,
+        'no-useless-return': 2,
+        'no-var': 2,
+        'object-curly-newline': [2, {consistent: true}],
+        'object-curly-spacing': [2, 'never'],
+        'object-shorthand': [2, 'properties'],
+        'operator-linebreak': [2, 'before', {
+            overrides: {
+                ':': 'ignore',
+                '?': 'ignore',
+            },
+        }],
+        'prefer-arrow-callback': 2,
+        'prefer-const': [2, {destructuring: 'all'}],
+        'prefer-destructuring': [2, {
+            array: false,
+            object: true,
+        }],
+        'prefer-object-spread': 2,
+        'quote-props': [2, 'as-needed'],
+        'quotes': [2, 'single', {
+            allowTemplateLiterals: true,
+            avoidEscape: true,
+        }],
+        'semi': [2, 'always'],
+        'space-before-blocks': 2,
+        'space-before-function-paren': [2, {
+            anonymous: 'always',
+            asyncArrow: 'always',
+            named: 'never',
+        }],
+        'space-unary-ops': [2, {
+            nonwords: false,
+            overrides: {'!': true},
+            words: true,
+        }],
+        'yoda': 2,
+    },
+};
diff --git a/Resources/Private/csscrush/composer.json b/Resources/Private/csscrush/composer.json
new file mode 100644
index 0000000..10cee4b
--- /dev/null
+++ b/Resources/Private/csscrush/composer.json
@@ -0,0 +1,33 @@
+{
+    "name": "css-crush/css-crush",
+    "type": "library",
+    "description": "CSS preprocessor",
+    "keywords": ["css", "preprocessor"],
+    "homepage": "http://the-echoplex.net/csscrush",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Pete Boere",
+            "email": "pete@the-echoplex.net"
+        },
+        {
+            "name": "GitHub contributors",
+            "homepage": "https://github.com/peteboere/css-crush/contributors"
+        }
+    ],
+    "require": {
+        "php": ">=5.6.1"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "5.*",
+        "psr/log": "1.0.*@dev",
+        "twig/twig": "1.*"
+    },
+    "bin": [
+        "bin/csscrush"
+    ],
+    "autoload": {
+        "psr-0": { "CssCrush": "lib/" },
+        "files": [ "lib/functions.php" ]
+    }
+}
diff --git a/Resources/Private/csscrush/index.js b/Resources/Private/csscrush/index.js
new file mode 100644
index 0000000..925f6c5
--- /dev/null
+++ b/Resources/Private/csscrush/index.js
@@ -0,0 +1,153 @@
+/*eslint no-control-regex: 0*/
+
+const path = require('path');
+const querystring = require('querystring');
+const {EventEmitter} = require('events');
+const cliPath = path.resolve(__dirname, './cli.php');
+
+const processes = [];
+const processExec = (...args) => {
+    processes.push(require('child_process').exec(...args));
+    return processes[processes.length-1];
+};
+
+process.on('exit', () => {
+    processes.filter(it => it).forEach(proc => proc.kill());
+});
+
+const self = module.exports = {};
+
+class Process extends EventEmitter {
+
+    exec(options) {
+        return new Promise(resolve => {
+            let command = this.assembleCommand(options);
+            const {stdIn} = options;
+            if (stdIn) {
+                command = `echo '${stdIn.replace(/'/g, "\\'")}' | ${command}`;
+            }
+            processExec(command, (error, stdout, stderr) => {
+                process.stderr.write(stderr.toString());
+                if (error) {
+                    return resolve(false);
+                }
+                const stdOut = stdout.toString();
+                if (stdIn) {
+                    process.stdout.write(stdOut);
+                }
+                return resolve(stdOut || true);
+            });
+        });
+    }
+
+    watch(options) {
+        options.watch = true;
+        const command = this.assembleCommand(options);
+        const proc = processExec(command);
+
+        /*
+         * Emitting 'error' events from EventEmitter without
+         * any error listener will throw uncaught exception.
+         */
+        this.on('error', () => {});
+
+        proc.stderr.on('data', msg => {
+            msg = msg.toString();
+            process.stderr.write(msg);
+            msg = msg.replace(/\x1B\[[^m]*m/g, '').trim();
+
+            const [, signal, detail] = /^([A-Z]+):\s*(.+)/i.exec(msg) || [];
+            const {input, output} = options;
+            const eventData = {
+                signal,
+                options: {
+                    input: input ? path.resolve(input) : null,
+                    output: output ? path.resolve(output) : null,
+                },
+            };
+
+            if (/^(WARNING|ERROR)$/.test(signal)) {
+                const error = new Error(detail);
+                Object.assign(error, eventData, {severity: signal.toLowerCase()});
+                this.emit('error', error);
+            }
+            else {
+                this.emit('data', {message: detail, ...eventData});
+            }
+        });
+        return this;
+    }
+
+    assembleCommand(options) {
+        return `${self.phpBin || 'php'} ${cliPath} ${this.stringifyOptions(options)}`;
+    }
+
+    stringifyOptions(options) {
+        const args = [];
+        options = {...options};
+        for (let name in options) {
+            // Normalize to hypenated case.
+            const cssCase = name.replace(/[A-Z]/g, m => `-${m.toLowerCase()}`);
+            if (name !== cssCase) {
+                options[cssCase] = options[name];
+                delete options[name];
+                name = cssCase;
+            }
+            let value = options[name];
+            switch (name) {
+                // Booleans.
+                case 'watch': // fallthrough
+                case 'source-map': // fallthrough
+                case 'boilerplate': // fallthrough
+                    if (value) {
+                        args.push(`--${name}`);
+                    }
+                    break;
+                case 'minify':
+                    if (! value) {
+                        args.push(`--pretty`);
+                    }
+                    break;
+                // Array/list values.
+                case 'vendor-target': // fallthrough
+                case 'plugins': // fallthrough
+                case 'import-path':
+                    if (value) {
+                        value = (Array.isArray(value) ? value : [value]).join(',');
+                        args.push(`--${name}="${value}"`);
+                    }
+                    break;
+                // String values.
+                case 'newlines': // fallthrough
+                case 'formatter': // fallthrough
+                case 'input': // fallthrough
+                case 'context': // fallthrough
+                case 'output':
+                    if (value) {
+                        args.push(`--${name}="${value}"`);
+                    }
+                    break;
+                case 'vars':
+                    args.push(`--${name}="${querystring.stringify(value)}"`);
+                    break;
+            }
+        }
+
+        return args.join(' ');
+    }
+}
+
+self.watch = (file, options={}) => {
+    options.input = file;
+    return (new Process()).watch(options);
+};
+
+self.file = (file, options={}) => {
+    options.input = file;
+    return (new Process()).exec(options);
+};
+
+self.string = (string, options={}) => {
+    options.stdIn = string;
+    return (new Process()).exec(options);
+};
diff --git a/Resources/Private/csscrush/package-lock.json b/Resources/Private/csscrush/package-lock.json
new file mode 100644
index 0000000..2df0a7b
--- /dev/null
+++ b/Resources/Private/csscrush/package-lock.json
@@ -0,0 +1,988 @@
+{
+    "name": "csscrush",
+    "version": "3.0.1",
+    "lockfileVersion": 1,
+    "requires": true,
+    "dependencies": {
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+            "dev": true,
+            "requires": {
+                "@babel/highlight": "^7.0.0"
+            }
+        },
+        "@babel/highlight": {
+            "version": "7.5.0",
+            "resolved": "https://registry.npmjs.org/@babel/highlight/-/highlight-7.5.0.tgz",
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+            "dev": true,
+            "requires": {
+                "chalk": "^2.0.0",
+                "esutils": "^2.0.2",
+                "js-tokens": "^4.0.0"
+            }
+        },
+        "acorn": {
+            "version": "7.1.0",
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+            "dev": true
+        },
+        "ajv": {
+            "version": "6.10.2",
+            "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.10.2.tgz",
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+                "lodash": "^4.17.14",
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+                "strip-ansi": "^4.0.0"
+            },
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+            "dev": true,
+            "requires": {
+                "has-flag": "^3.0.0"
+            }
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+            "resolved": "https://registry.npmjs.org/table/-/table-5.4.6.tgz",
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+                "lodash": "^4.17.14",
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+            "dev": true,
+            "requires": {
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+            }
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+            "integrity": "sha1-WITKtRLPHTVeP7eE8wgEsrUg23I=",
+            "dev": true,
+            "requires": {
+                "prelude-ls": "~1.1.2"
+            }
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+            "requires": {
+                "punycode": "^2.1.0"
+            }
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+            "dev": true,
+            "requires": {
+                "isexe": "^2.0.0"
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+            "integrity": "sha1-J1hIEIkUVqQXHI0CJkQa3pDLyus=",
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+            "resolved": "https://registry.npmjs.org/write/-/write-1.0.3.tgz",
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+            "dev": true,
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diff --git a/Resources/Private/csscrush/package.json b/Resources/Private/csscrush/package.json
new file mode 100644
index 0000000..2c38578
--- /dev/null
+++ b/Resources/Private/csscrush/package.json
@@ -0,0 +1,24 @@
+{
+    "name": "csscrush",
+    "version": "3.0.1",
+    "description": "CSS-Crush, CSS preprocessor",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/peteboere/css-crush.git"
+    },
+    "bugs": {
+        "url": "https://github.com/peteboere/css-crush/issues"
+    },
+    "bin": {
+        "csscrush": "./bin/csscrush"
+    },
+    "scripts": {
+        "lint": "eslint --fix index.js"
+    },
+    "homepage": "http://the-echoplex.net/csscrush",
+    "license": "MIT",
+    "devDependencies": {
+        "eslint": "~6.5.1",
+        "normalize.css": "7.0.0"
+    }
+}
diff --git a/Resources/Private/scssphp/README.md b/Resources/Private/scssphp/README.md
index 86eba25..5455734 100644
--- a/Resources/Private/scssphp/README.md
+++ b/Resources/Private/scssphp/README.md
@@ -1,12 +1,12 @@
 # scssphp
-### <http://scssphp.github.io/scssphp>
+### <https://scssphp.github.io/scssphp>
 
-[![Build](https://travis-ci.org/scssphp/scssphp.svg?branch=master)](http://travis-ci.org/scssphp/scssphp)
+![Build](https://github.com/scssphp/scssphp/workflows/CI/badge.svg)
 [![License](https://poser.pugx.org/scssphp/scssphp/license)](https://packagist.org/packages/scssphp/scssphp)
 
 `scssphp` is a compiler for SCSS written in PHP.
 
-Checkout the homepage, <http://scssphp.github.io/scssphp>, for directions on how to use.
+Checkout the homepage, <https://scssphp.github.io/scssphp>, for directions on how to use.
 
 ## Running Tests
 
@@ -23,7 +23,7 @@ There are several tests in the `tests/` directory:
 * `FailingTest.php` contains tests reported in Github issues that demonstrate compatibility bugs.
 * `InputTest.php` compiles every `.scss` file in the `tests/inputs` directory
   then compares to the respective `.css` file in the `tests/outputs` directory.
-* `ScssTest.php` extracts (ruby) `scss` tests from the `tests/scss_test.rb` file.
+* `SassSpecTest.php` extracts tests from the `sass/sass-spec` repository.
 
 When changing any of the tests in `tests/inputs`, the tests will most likely
 fail because the output has changed. Once you verify that the output is correct
@@ -31,16 +31,17 @@ you can run the following command to rebuild all the tests:
 
     BUILD=1 vendor/bin/phpunit tests
 
-This will compile all the tests, and save results into `tests/outputs`.
+This will compile all the tests, and save results into `tests/outputs`. It also
+updates the list of excluded specs from sass-spec.
 
-To enable the `scss` compatibility tests:
+To enable the full `sass-spec` compatibility tests:
 
-    TEST_SCSS_COMPAT=1 vendor/bin/phpunit tests
+    TEST_SASS_SPEC=1 vendor/bin/phpunit tests
 
 ## Coding Standard
 
-`scssphp` source conforms to [PSR2](http://www.php-fig.org/psr/psr-2/).
+`scssphp` source conforms to [PSR12](https://www.php-fig.org/psr/psr-12/).
 
 Run the following command from the root directory to check the code for "sniffs".
 
-    vendor/bin/phpcs --standard=PSR2 bin src tests
+    vendor/bin/phpcs --standard=PSR12 --extensions=php bin src tests *.php
diff --git a/Resources/Private/scssphp/bin/pscss b/Resources/Private/scssphp/bin/pscss
new file mode 100644
index 0000000..8b2e466
--- /dev/null
+++ b/Resources/Private/scssphp/bin/pscss
@@ -0,0 +1,200 @@
+#!/usr/bin/env php
+<?php
+
+/**
+ * SCSSPHP
+ *
+ * @copyright 2012-2020 Leaf Corcoran
+ *
+ * @license http://opensource.org/licenses/MIT MIT
+ *
+ * @link http://scssphp.github.io/scssphp
+ */
+
+error_reporting(E_ALL);
+
+if (version_compare(PHP_VERSION, '5.6') < 0) {
+    die('Requires PHP 5.6 or above');
+}
+
+include __DIR__ . '/../scss.inc.php';
+
+use ScssPhp\ScssPhp\Compiler;
+use ScssPhp\ScssPhp\Exception\SassException;
+use ScssPhp\ScssPhp\OutputStyle;
+use ScssPhp\ScssPhp\Parser;
+use ScssPhp\ScssPhp\Version;
+
+$style = null;
+$loadPaths = null;
+$dumpTree = false;
+$inputFile = null;
+$changeDir = false;
+$encoding = false;
+$sourceMap = false;
+
+/**
+ * Parse argument
+ *
+ * @param integer $i
+ * @param array $options
+ *
+ * @return string|null
+ */
+function parseArgument(&$i, $options) {
+    global $argc;
+    global $argv;
+
+    if (! preg_match('/^(?:' . implode('|', (array) $options) . ')=?(.*)/', $argv[$i], $matches)) {
+        return;
+    }
+
+    if (strlen($matches[1])) {
+        return $matches[1];
+    }
+
+    if ($i + 1 < $argc) {
+        $i++;
+
+        return $argv[$i];
+    }
+}
+
+for ($i = 1; $i < $argc; $i++) {
+    if ($argv[$i] === '-?' || $argv[$i] === '-h' || $argv[$i] === '--help') {
+        $exe = $argv[0];
+
+        $HELP = <<<EOT
+Usage: $exe [options] [input-file]
+
+Options include:
+
+    --help              Show this message [-h, -?]
+    --continue-on-error [deprecated] Ignored
+    --debug-info        [deprecated] Ignored [-g]
+    --dump-tree         Dump formatted parse tree [-T]
+    --iso8859-1         Use iso8859-1 encoding instead of default utf-8
+    --line-numbers      [deprecated] Ignored [--line-comments]
+    --load-path=PATH    Set import path [-I]
+    --precision=N       [deprecated] Ignored. (default 10) [-p]
+    --sourcemap         Create source map file
+    --style=FORMAT      Set the output style (compressed or expanded) [-s, -t]
+    --version           Print the version [-v]
+
+EOT;
+        exit($HELP);
+    }
+
+    if ($argv[$i] === '-v' || $argv[$i] === '--version') {
+        exit(Version::VERSION . "\n");
+    }
+
+    // Keep parsing --continue-on-error to avoid BC breaks for scripts using it
+    if ($argv[$i] === '--continue-on-error') {
+        // TODO report it as a warning ?
+        continue;
+    }
+
+    // Keep parsing it to avoid BC breaks for scripts using it
+    if ($argv[$i] === '-g' || $argv[$i] === '--debug-info') {
+        // TODO report it as a warning ?
+        continue;
+    }
+
+    if ($argv[$i] === '--iso8859-1') {
+        $encoding = 'iso8859-1';
+        continue;
+    }
+
+    // Keep parsing it to avoid BC breaks for scripts using it
+    if ($argv[$i] === '--line-numbers' || $argv[$i] === '--line-comments') {
+        // TODO report it as a warning ?
+        continue;
+    }
+
+    if ($argv[$i] === '--sourcemap') {
+        $sourceMap = true;
+        continue;
+    }
+
+    if ($argv[$i] === '-T' || $argv[$i] === '--dump-tree') {
+        $dumpTree = true;
+        continue;
+    }
+
+    $value = parseArgument($i, array('-t', '-s', '--style'));
+
+    if (isset($value)) {
+        $style = $value;
+        continue;
+    }
+
+    $value = parseArgument($i, array('-I', '--load-path'));
+
+    if (isset($value)) {
+        $loadPaths = $value;
+        continue;
+    }
+
+    // Keep parsing --precision to avoid BC breaks for scripts using it
+    $value = parseArgument($i, array('-p', '--precision'));
+
+    if (isset($value)) {
+        // TODO report it as a warning ?
+        continue;
+    }
+
+    if (file_exists($argv[$i])) {
+        $inputFile = $argv[$i];
+        continue;
+    }
+}
+
+
+if ($inputFile) {
+    $data = file_get_contents($inputFile);
+} else {
+    $data = '';
+
+    while (! feof(STDIN)) {
+        $data .= fread(STDIN, 8192);
+    }
+}
+
+if ($dumpTree) {
+    $parser = new Parser($inputFile);
+
+    print_r(json_decode(json_encode($parser->parse($data)), true));
+
+    exit();
+}
+
+$scss = new Compiler();
+
+if ($loadPaths) {
+    $scss->setImportPaths(explode(PATH_SEPARATOR, $loadPaths));
+}
+
+if ($style) {
+    if ($style === OutputStyle::COMPRESSED || $style === OutputStyle::EXPANDED) {
+        $scss->setOutputStyle($style);
+    } else {
+        fwrite(STDERR, "WARNING: the $style style is deprecated.\n");
+        $scss->setFormatter('ScssPhp\\ScssPhp\\Formatter\\' . ucfirst($style));
+    }
+}
+
+if ($sourceMap) {
+    $scss->setSourceMap(Compiler::SOURCE_MAP_INLINE);
+}
+
+if ($encoding) {
+    $scss->setEncoding($encoding);
+}
+
+try {
+    echo $scss->compile($data, $inputFile);
+} catch (SassException $e) {
+    fwrite(STDERR, $e->getMessage()."\n");
+    exit(1);
+}
diff --git a/Resources/Private/scssphp/composer.json b/Resources/Private/scssphp/composer.json
new file mode 100644
index 0000000..e4c47d3
--- /dev/null
+++ b/Resources/Private/scssphp/composer.json
@@ -0,0 +1,65 @@
+{
+    "name": "scssphp/scssphp",
+    "type": "library",
+    "description": "scssphp is a compiler for SCSS written in PHP.",
+    "keywords": ["css", "stylesheet", "scss", "sass", "less"],
+    "homepage": "http://scssphp.github.io/scssphp/",
+    "license": [
+        "MIT"
+    ],
+    "authors": [
+        {
+            "name": "Anthon Pang",
+            "email": "apang@softwaredevelopment.ca",
+            "homepage": "https://github.com/robocoder"
+        },
+        {
+            "name": "Cédric Morin",
+            "email": "cedric@yterium.com",
+            "homepage": "https://github.com/Cerdic"
+        }
+    ],
+    "autoload": {
+        "psr-4": { "ScssPhp\\ScssPhp\\": "src/" }
+    },
+    "autoload-dev": {
+        "psr-4": { "ScssPhp\\ScssPhp\\Tests\\": "tests/" }
+    },
+    "require": {
+        "php": ">=5.6.0",
+        "ext-json": "*",
+        "ext-ctype": "*"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^5.7 || ^6.5 || ^7.5 || ^8.3 || ^9.4",
+        "sass/sass-spec": "2020.12.29",
+        "squizlabs/php_codesniffer": "~3.5",
+        "symfony/phpunit-bridge": "^5.1",
+        "twbs/bootstrap": "~4.3",
+        "zurb/foundation": "~6.5"
+    },
+    "repositories": [
+        {
+            "type": "package",
+            "package": {
+                "name": "sass/sass-spec",
+                "version": "2020.12.29",
+                "source": {
+                    "type": "git",
+                    "url": "https://github.com/sass/sass-spec.git",
+                    "reference": "d975d33146fb679a6b359ceca329012f02e4a794"
+                },
+                "dist": {
+                    "type": "zip",
+                    "url": "https://api.github.com/repos/sass/sass-spec/zipball/d975d33146fb679a6b359ceca329012f02e4a794",
+                    "reference": "d975d33146fb679a6b359ceca329012f02e4a794",
+                    "shasum": ""
+                }
+            }
+        }
+    ],
+    "bin": ["bin/pscss"],
+    "config": {
+        "sort-packages": true
+    }
+}
diff --git a/Resources/Private/scssphp/phpcs.xml.dist b/Resources/Private/scssphp/phpcs.xml.dist
new file mode 100644
index 0000000..b162dbd
--- /dev/null
+++ b/Resources/Private/scssphp/phpcs.xml.dist
@@ -0,0 +1,12 @@
+<?xml version="1.0"?>
+<ruleset name="PSR12 (adapted for PHP 5.6+)">
+    <rule ref="PSR12">
+        <!-- Ignore this PHP 7.1+ sniff as long as we support PHP 5.6+ -->
+        <exclude name="PSR12.Properties.ConstantVisibility.NotFound"/>
+
+        <!-- This sniff doesn't ignore comment blocks -->
+<!--
+        <exclude name="Generic.Files.LineLength"/>
+-->
+    </rule>
+</ruleset>
diff --git a/Resources/Public/Icons/Extension.svg b/Resources/Public/Icons/Extension.svg
new file mode 100644
index 0000000..f94d7d7
--- /dev/null
+++ b/Resources/Public/Icons/Extension.svg
@@ -0,0 +1 @@
+<svg viewBox="0 0 1713 1713" xmlns="http://www.w3.org/2000/svg" fill-rule="evenodd" clip-rule="evenodd" stroke-linejoin="round" stroke-miterlimit="2"><path d="M855.984.538c472.746 0 855.98 383.241 855.98 855.984 0 472.746-383.234 855.98-855.98 855.98C383.238 1712.501 0 1329.267 0 856.521 0 383.779 383.238.538 855.984.538z" fill="#cd6699"/><path d="M685.871 1141.65c12.455 46.068 11.088 89.026-1.775 127.93a210.818 210.818 0 01-10.254 25.325c-9.92 20.584-23.233 39.85-39.537 57.634-49.734 54.258-119.221 74.775-149.017 57.487-32.175-18.65-16.058-95.15 41.604-156.1 62.033-65.58 151.288-107.742 151.288-107.742l-.138-.266a884.274 884.274 0 007.83-4.267zm707.043-774.737C1354.15 214.888 1102.076 164.908 863.5 249.667c-141.98 50.442-295.684 129.608-406.2 232.98C325.895 605.554 304.94 712.53 313.574 757.23c30.467 157.725 246.584 260.82 335.426 337.313v.462c-26.196 12.896-217.934 109.93-262.805 209.13-47.346 104.654 7.533 179.754 43.871 189.862 112.58 31.32 228.104-25.017 290.188-117.62 59.912-89.368 54.925-204.768 28.887-262.172 35.917-9.475 77.788-13.72 131-7.504 150.155 17.537 179.617 111.296 173.984 150.525-5.63 39.242-37.125 60.817-47.654 67.33-10.534 6.516-13.746 8.77-12.859 13.612 1.275 7.041 6.15 6.779 15.13 5.258 12.358-2.083 78.845-31.917 81.687-104.346 3.62-91.958-84.504-194.825-240.542-192.137-64.262 1.108-104.67 7.22-133.858 18.083a299.448 299.448 0 00-6.625-7.325C612.938 954.78 434.609 881.976 442.17 743.613c2.75-50.3 20.234-182.754 342.663-343.417 264.125-131.612 475.567-95.396 512.109-15.129 52.196 114.67-113.005 327.804-387.3 358.546-104.505 11.717-159.53-28.787-173.217-43.87-14.413-15.88-16.559-16.597-21.938-13.617-8.767 4.854-3.212 18.875 0 27.233 8.188 21.312 41.796 59.108 99.092 77.908 50.4 16.542 173.1 25.63 321.488-31.766 166.187-64.288 295.962-243.113 257.846-392.588z" fill="#fff" fill-rule="nonzero"/></svg>
\ No newline at end of file
diff --git a/composer.json b/composer.json
index f4ccd9b..8911332 100644
--- a/composer.json
+++ b/composer.json
@@ -11,8 +11,8 @@
         "sass"
     ],
     "require": {
-        "typo3/cms-core": "^9.5 || ^10.4 || ^11",
-        "php": "^7.2",
+        "typo3/cms-core": "^10.4 || ^11",
+        "php": "^7.4",
         "scssphp/scssphp": "^1",
         "css-crush/css-crush": "^3"
     },
diff --git a/ext_emconf.php b/ext_emconf.php
index 0cf22a6..ee25f5c 100644
--- a/ext_emconf.php
+++ b/ext_emconf.php
@@ -14,34 +14,26 @@
     'title' => 'SASS compiler for TYPO3',
     'description' => 'Compiles scss files to CSS files.',
     'category' => 'fe',
-    'shy' => 0,
-    'version' => '1.1.24',
-    'dependencies' => '',
-    'conflicts' => '',
-    'priority' => '',
-    'loadOrder' => '',
-    'module' => '',
-    'state' => 'stable',
-    'uploadfolder' => 0,
-    'createDirs' => '',
-    'modify_tables' => '',
-    'clearcacheonload' => 0,
-    'lockType' => '',
     'author' => 'Sven Wappler',
     'author_email' => 'typo3YYYY@wappler.systems',
     'author_company' => 'WapplerSystems',
-    'CGLcompliance' => '',
-    'CGLcompliance_note' => '',
+    'version' => '1.2.0',
+    'state' => 'alpha',
+    'clearCacheOnLoad' => false,
     'constraints' => [
         'depends' => [
-            'php' => '7.2.0-7.4.99',
-            'typo3' => '9.5.0-11.1.99',
+            'php' => '7.4.0-7.4.99',
+            'typo3' => '10.4.0-11.1.99',
         ],
         'conflicts' => [
         ],
         'suggests' => [
         ],
     ],
-    'suggests' => [
-    ],
+    'autoload' => [
+        'psr-4' => [
+            'WapplerSystems\\WsScss\\' => 'Classes',
+            'ScssPhp\\ScssPhp\\' => 'Resources/Private/scssphp/src/'
+        ]
+    ]
 ];
diff --git a/ext_icon.png b/ext_icon.png
deleted file mode 100644
index 911e9b7..0000000
Binary files a/ext_icon.png and /dev/null differ
diff --git a/ext_localconf.php b/ext_localconf.php
index fea7ad7..c54c8b9 100644
--- a/ext_localconf.php
+++ b/ext_localconf.php
@@ -1,20 +1,22 @@
 <?php
-if (!defined('TYPO3_MODE')) {
-    die('Access denied.');
-}
+defined('TYPO3_MODE') || die('Access denied.');
 
 if (TYPO3_MODE === 'FE') {
     $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['t3lib/class.t3lib_pagerenderer.php']['render-preProcess']['wsscss'] = \WapplerSystems\WsScss\Hooks\RenderPreProcessorHook::class . '->renderPreProcessorProc';
 }
 
-// Caching the pages - default expire 3600 seconds
-if (!isset($GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['ws_scss'])
-    && !is_array($GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['ws_scss'])) {
-    $GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['ws_scss'] = [
-        'frontend' => \TYPO3\CMS\Core\Cache\Frontend\VariableFrontend::class,
-        'backend' => \TYPO3\CMS\Core\Cache\Backend\FileBackend::class,
-        'options' => [
-            'defaultLifetime' => 0,
-        ]
+
+if (!is_array($GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['ws_scss'])) {
+    $GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['ws_scss'] = [];
+}
+if (!isset($GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['ws_scss']['backend'])) {
+    $GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['ws_scss']['backend'] = \TYPO3\CMS\Core\Cache\Backend\FileBackend::class;
+}
+if (!isset($GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['ws_scss']['frontend'])) {
+    $GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['ws_scss']['frontend'] = \TYPO3\CMS\Core\Cache\Frontend\VariableFrontend::class;
+}
+if (!isset($GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['ws_scss']['options'])) {
+    $GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['ws_scss']['options'] = [
+        'defaultLifetime' => 0,
     ];
 }
diff --git a/ext_typoscript_setup.txt b/ext_typoscript_setup.txt
deleted file mode 100644
index 6bc83f5..0000000
--- a/ext_typoscript_setup.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-
-plugin.tx_wsscss.variables {
-  
-    
-  
-    #test = #666
-  
-
-}