diff --git a/Web/Themes/Themepack.php b/Web/Themes/Themepack.php
index b7718c2b..21de3973 100644
--- a/Web/Themes/Themepack.php
+++ b/Web/Themes/Themepack.php
@@ -1,5 +1,7 @@
 <?php declare(strict_types=1);
 namespace openvk\Web\Themes;
+use ScssPhp\ScssPhp\Compiler as CSSCompiler;
+use ScssPhp\ScssPhp\OutputStyle;
 
 class Themepack
 {
@@ -11,6 +13,11 @@ class Themepack
     private $home;
     private $enabled;
     
+    private $cssExtensions = [
+        "css",
+        "scss",
+    ];
+    
     function __construct(string $id, string $ver, bool $inh, bool $tpl, bool $enabled, object $meta)
     {
         $this->id      = $id;
@@ -72,16 +79,31 @@ class Themepack
         return $this->tpl;                                                                                                                                                     
     }
     
+    function fetchResource(string $resource, bool $processCSS = false): ?string
+    {
+        $file = "$this->home/$resource";
+        if(!file_exists($file))
+            return NULL;
+        
+        $result = file_get_contents($file);
+        if(in_array(@end(explode(".", $resource)), $this->cssExtensions) && $processCSS) {
+            $compiler = new CSSCompiler([ "cacheDir" => OPENVK_ROOT . "/tmp" ]);
+            $compiler->setOutputStyle(OutputStyle::COMPRESSED);
+            
+            $result = $compiler->compileString($result, $file)->getCSS();
+        }
+        
+        return $result;
+    }
+    
     function fetchStyleSheet(): ?string
     {
-        $file = "$this->home/stylesheet.css";
-        return file_exists($file) ? file_get_contents($file) : NULL;
+        return $this->fetchResource("stylesheet.scss", true) ?? $this->fetchResource("stylesheet.css", true);
     }
     
     function fetchStaticResource(string $name): ?string
     {
-        $file = "$this->home/res/$name";
-        return file_exists($file) ? file_get_contents($file) : NULL;
+        return $this->fetchResource("res/$name");
     }
     
     static function themepackFromDir(string $dirname): Themepack
diff --git a/composer.json b/composer.json
index 8ef929af..345550c2 100644
--- a/composer.json
+++ b/composer.json
@@ -9,7 +9,8 @@
         "wapmorgan/binary-stream": "dev-master",
         "netcarver/textile": "^3.7@dev",
         "al/emoji-detector": "dev-master",
-        "ezyang/htmlpurifier": "dev-master"
+        "ezyang/htmlpurifier": "dev-master",
+        "scssphp/scssphp": "dev-master"
     },
     "minimum-stability": "dev"
 }
diff --git a/composer.lock b/composer.lock
index 78758e20..3d130755 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "6188ae124a67b6cf9d5283904dadc141",
+    "content-hash": "4d1d3d279e0f7adca1e7035ddd41797b",
     "packages": [
         {
             "name": "al/emoji-detector",
@@ -730,6 +730,77 @@
             ],
             "time": "2020-05-02T23:50:29+00:00"
         },
+        {
+            "name": "scssphp/scssphp",
+            "version": "dev-master",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/scssphp/scssphp.git",
+                "reference": "ef764826670a6a56161eee63996101b0ad9eecfc"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/scssphp/scssphp/zipball/ef764826670a6a56161eee63996101b0ad9eecfc",
+                "reference": "ef764826670a6a56161eee63996101b0ad9eecfc",
+                "shasum": ""
+            },
+            "require": {
+                "ext-ctype": "*",
+                "ext-json": "*",
+                "php": ">=7.2"
+            },
+            "require-dev": {
+                "bamarni/composer-bin-plugin": "^1.4",
+                "phpunit/phpunit": "^8.5 || ^9.5",
+                "sass/sass-spec": "*",
+                "squizlabs/php_codesniffer": "~3.5",
+                "symfony/phpunit-bridge": "^5.1",
+                "twbs/bootstrap": "~5.0",
+                "twbs/bootstrap4": "4.6.0",
+                "zurb/foundation": "~6.5"
+            },
+            "suggest": {
+                "ext-iconv": "Can be used as fallback when ext-mbstring is not available",
+                "ext-mbstring": "For best performance, mbstring should be installed as it is faster than ext-iconv"
+            },
+            "default-branch": true,
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "ScssPhp\\ScssPhp\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "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"
+                }
+            ],
+            "description": "scssphp is a compiler for SCSS written in PHP.",
+            "homepage": "http://scssphp.github.io/scssphp/",
+            "keywords": [
+                "css",
+                "less",
+                "sass",
+                "scss",
+                "stylesheet"
+            ],
+            "support": {
+                "issues": "https://github.com/scssphp/scssphp/issues",
+                "source": "https://github.com/scssphp/scssphp/tree/master"
+            },
+            "time": "2021-09-15T23:25:40+00:00"
+        },
         {
             "name": "symfony/polyfill-intl-idn",
             "version": "dev-master",
@@ -1206,11 +1277,12 @@
         "wapmorgan/binary-stream": 20,
         "netcarver/textile": 20,
         "al/emoji-detector": 20,
-        "ezyang/htmlpurifier": 20
+        "ezyang/htmlpurifier": 20,
+        "scssphp/scssphp": 20
     },
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": [],
     "platform-dev": [],
-    "plugin-api-version": "2.0.0"
+    "plugin-api-version": "2.1.0"
 }