diff --git a/src/OpenMage/Composer/Plugin.php b/src/OpenMage/Composer/Plugin.php
index cdb9cb3..0e0e789 100644
--- a/src/OpenMage/Composer/Plugin.php
+++ b/src/OpenMage/Composer/Plugin.php
@@ -53,8 +53,10 @@ public function processTinyMce(Event $event): void
         $composer = $event->getComposer();
         $extra = $composer->getPackage()->getExtra();
 
-        $magentoRootDir = array_key_exists(self::EXTRA_MAGENTO_ROOT_DIR, $extra) ? $extra[self::EXTRA_MAGENTO_ROOT_DIR] : '.';
-        $magentoRootDir .= '/';
+        $magentoRootDir = '';
+        if (array_key_exists(self::EXTRA_MAGENTO_ROOT_DIR, $extra) && $extra[self::EXTRA_MAGENTO_ROOT_DIR] !== '.') {
+            $magentoRootDir = $extra[self::EXTRA_MAGENTO_ROOT_DIR] . '/';
+        }
 
         $plugin = new Plugin\TinyMce();
         $plugin->process($event, $magentoRootDir);
diff --git a/src/OpenMage/Composer/Plugin/TinyMce.php b/src/OpenMage/Composer/Plugin/TinyMce.php
index 098290b..4dae884 100644
--- a/src/OpenMage/Composer/Plugin/TinyMce.php
+++ b/src/OpenMage/Composer/Plugin/TinyMce.php
@@ -63,7 +63,7 @@ public function process(Event $event, string $magentoRootDir): void
         foreach (self::$modules as $moduleName => $copyTarget) {
             $tinyMceModule = $this->getTinyMceModule($event, $io, $moduleName);
             if ($tinyMceModule) {
-                $rootDir    = getcwd();
+                $rootDir     = getcwd();
                 /** @var string $vendorDir */
                 $vendorDir   = $event->getComposer()->getConfig()->get('vendor-dir');
 
@@ -71,7 +71,7 @@ public function process(Event $event, string $magentoRootDir): void
                 $mainVersion = $version[0] ?? null;
 
                 $copySource  = $vendorDir . '/' . $moduleName;
-                $copyTarget  = $rootDir . '/' . $copyTarget;
+                $copyTarget  = $rootDir . '/' . $magentoRootDir . $copyTarget;
 
                 if ($moduleName === self::TINYMCE_MODULE) {
                     switch ((int) $mainVersion) {
@@ -93,7 +93,7 @@ public function process(Event $event, string $magentoRootDir): void
                     $copySource = $copySource . '/langs' . $mainVersion;
                 }
 
-                $this->copy($io, $copySource, $magentoRootDir . $copyTarget);
+                $this->copy($io, $copySource, $copyTarget);
             }
         }
     }
@@ -133,7 +133,11 @@ private function copy(IOInterface $io, string $source, string $target): void
     {
         $filesystem = new Filesystem();
         $finder = new Finder();
-        $finder->in($source)->name('*.js');
+        $finder
+            ->files()
+            ->in($source)
+            ->name('*.css')
+            ->name('*.js');
         foreach ($finder as $file) {
             $copySource = $file->getPathname();
             $copytarget = $target . '/' . $file->getRelativePathname();