diff --git a/src/mibew/client.php b/src/mibew/client.php
index 923eed45..4d86c77a 100644
--- a/src/mibew/client.php
+++ b/src/mibew/client.php
@@ -18,6 +18,7 @@
 // Import namespaces and classes of the core
 use Mibew\Settings;
 use Mibew\Thread;
+use Mibew\Style\ChatStyle;
 
 // Initialize libraries
 require_once(dirname(__FILE__).'/libs/init.php');
@@ -28,9 +29,6 @@ require_once(MIBEW_FS_ROOT.'/libs/expand.php');
 require_once(MIBEW_FS_ROOT.'/libs/captcha.php');
 require_once(MIBEW_FS_ROOT.'/libs/invitation.php');
 require_once(MIBEW_FS_ROOT.'/libs/track.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/chat_style.php');
 
 if(Settings::get('enablessl') == "1" && Settings::get('forcessl') == "1") {
 	if(!is_secure_request()) {
diff --git a/src/mibew/install/dbinfo.php b/src/mibew/install/dbinfo.php
index 566caaa7..48804863 100644
--- a/src/mibew/install/dbinfo.php
+++ b/src/mibew/install/dbinfo.php
@@ -297,7 +297,7 @@ function show_install_err($text)
 		'fixedwrap' => true,
 	);
 	$errors = array($text);
-	$page_style = new PageStyle('default');
+	$page_style = new \Mibew\Style\PageStyle('default');
 	$page_style->render('install_err');
 	exit;
 }
diff --git a/src/mibew/install/index.php b/src/mibew/install/index.php
index 9f3e03cd..659e1635 100644
--- a/src/mibew/install/index.php
+++ b/src/mibew/install/index.php
@@ -35,9 +35,9 @@ require_once(MIBEW_FS_ROOT.'/libs/common/locale.php');
 require_once(MIBEW_FS_ROOT.'/libs/common/misc.php');
 require_once(MIBEW_FS_ROOT.'/libs/common/response.php');
 require_once(MIBEW_FS_ROOT.'/libs/common/string.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
+require_once(MIBEW_FS_ROOT.'/libs/classes/Mibew/Style/StyleInterface.php');
+require_once(MIBEW_FS_ROOT.'/libs/classes/Mibew/Style/BaseStyle.php');
+require_once(MIBEW_FS_ROOT.'/libs/classes/Mibew/Style/PageStyle.php');
 // Include database structure
 require_once(MIBEW_FS_ROOT.'/install/dbinfo.php');
 
@@ -379,7 +379,7 @@ check_status();
 $page['title'] = getlocal("install.title");
 $page['fixedwrap'] = true;
 
-$page_style = new PageStyle('default');
+$page_style = new \Mibew\Style\PageStyle('default');
 $page_style->render('install_index');
 
 ?>
\ No newline at end of file
diff --git a/src/mibew/libs/chat.php b/src/mibew/libs/chat.php
index 7e265c50..bcb1f756 100644
--- a/src/mibew/libs/chat.php
+++ b/src/mibew/libs/chat.php
@@ -19,6 +19,8 @@
 use Mibew\Database;
 use Mibew\Settings;
 use Mibew\Thread;
+use Mibew\Style\ChatStyle;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(MIBEW_FS_ROOT.'/libs/track.php');
@@ -29,10 +31,6 @@ require_once(MIBEW_FS_ROOT.'/libs/classes/mibew_api_execution_context.php');
 require_once(MIBEW_FS_ROOT.'/libs/classes/request_processor.php');
 require_once(MIBEW_FS_ROOT.'/libs/classes/client_side_processor.php');
 require_once(MIBEW_FS_ROOT.'/libs/classes/thread_processor.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/chat_style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 /**
  * Names for chat-related cookies
diff --git a/src/mibew/libs/classes/style.php b/src/mibew/libs/classes/Mibew/Style/BaseStyle.php
similarity index 90%
rename from src/mibew/libs/classes/style.php
rename to src/mibew/libs/classes/Mibew/Style/BaseStyle.php
index 1e176c13..7c4593e2 100644
--- a/src/mibew/libs/classes/style.php
+++ b/src/mibew/libs/classes/Mibew/Style/BaseStyle.php
@@ -15,10 +15,12 @@
  * limitations under the License.
  */
 
+namespace Mibew\Style;
+
 /**
  * Base class for styles
  */
-abstract class Style {
+abstract class BaseStyle {
 	/**
 	 * Styles configuration array or NULL by default
 	 * @var array|NULL
@@ -32,10 +34,10 @@ abstract class Style {
 	protected $styleName;
 
 	/**
-	 * Contains cached results of the Style::getStyleList method. The lists are
-	 * keyed by the $root_dir argument of the method.
+	 * Contains cached results of the \Mibew\Style\StyleInterface::getStyleList
+	 * method. The lists are keyed by the $root_dir argument of the method.
 	 * @var array
-	 * @see Style::getStyleList
+	 * @see \Mibew\Style\StyleInterface::getStyleList
 	 */
 	protected static $cachedStyleLists = array();
 
@@ -62,7 +64,7 @@ abstract class Style {
 	 * instance.
 	 *
 	 * @return array Style configurations
-	 * @throws RuntimeException
+	 * @throws \RuntimeException
 	 */
 	public function configurations() {
 		$config_file = MIBEW_FS_ROOT . '/' . $this->filesPath() . '/config.ini';
@@ -74,7 +76,7 @@ abstract class Style {
 
 			// Try to read configuration file
 			if (!is_readable($config_file)) {
-				throw new RuntimeException('Cannot read configuration file');
+				throw new \RuntimeException('Cannot read configuration file');
 			}
 
 			// Load configurations from file, merge it with default configs and
diff --git a/src/mibew/libs/classes/chat_style.php b/src/mibew/libs/classes/Mibew/Style/ChatStyle.php
similarity index 92%
rename from src/mibew/libs/classes/chat_style.php
rename to src/mibew/libs/classes/Mibew/Style/ChatStyle.php
index 1154a754..d3a19bb8 100644
--- a/src/mibew/libs/classes/chat_style.php
+++ b/src/mibew/libs/classes/Mibew/Style/ChatStyle.php
@@ -15,13 +15,15 @@
  * limitations under the License.
  */
 
+namespace Mibew\Style;
+
 // Import namespaces and classes of the core
 use Mibew\Settings;
 
 /**
  * Represents a chat style
  */
-class ChatStyle extends Style implements StyleInterface {
+class ChatStyle extends BaseStyle implements StyleInterface {
 	/**
 	 * Builds base path for style files. This path is relative Mibew root and
 	 * does not contain neither leading nor trailing slash.
@@ -53,6 +55,7 @@ class ChatStyle extends Style implements StyleInterface {
 	 * other criteria.
 	 *
 	 * @return string Name of a style
+	 * @throws \RuntimeException
 	 */
 	public static function currentStyle() {
 		// Ceck if request contains chat style
@@ -65,7 +68,7 @@ class ChatStyle extends Style implements StyleInterface {
 		// Get all style list and make sure that in has at least one style.
 		$available_styles = self::availableStyles();
 		if (empty($available_styles)) {
-			throw new RuntimeException('There are no dialog styles in the system');
+			throw new \RuntimeException('There are no dialog styles in the system');
 		}
 
 		// Check if selected style exists. If it does not exist try to fall back
@@ -76,7 +79,7 @@ class ChatStyle extends Style implements StyleInterface {
 		} elseif (in_array('default', $available_styles)) {
 			return 'default';
 		} else {
-			throw new RuntimeException('There is no appropriate dialog style in the system');
+			throw new \RuntimeException('There is no appropriate dialog style in the system');
 		}
 	}
 
diff --git a/src/mibew/libs/classes/invitation_style.php b/src/mibew/libs/classes/Mibew/Style/InvitationStyle.php
similarity index 96%
rename from src/mibew/libs/classes/invitation_style.php
rename to src/mibew/libs/classes/Mibew/Style/InvitationStyle.php
index 4f03082a..741d1217 100644
--- a/src/mibew/libs/classes/invitation_style.php
+++ b/src/mibew/libs/classes/Mibew/Style/InvitationStyle.php
@@ -15,13 +15,15 @@
  * limitations under the License.
  */
 
+namespace Mibew\Style;
+
 // Import namespaces and classes of the core
 use Mibew\Settings;
 
 /**
  * Represents a style for invitations
  */
-class InvitationStyle extends Style implements StyleInterface {
+class InvitationStyle extends BaseStyle implements StyleInterface {
 	/**
 	 * Builds base path for style files. This path is relative Mibew root and
 	 * does not contain neither leading nor trailing slash.
diff --git a/src/mibew/libs/classes/page_style.php b/src/mibew/libs/classes/Mibew/Style/PageStyle.php
similarity index 97%
rename from src/mibew/libs/classes/page_style.php
rename to src/mibew/libs/classes/Mibew/Style/PageStyle.php
index 80a0757e..f7e0ca0c 100644
--- a/src/mibew/libs/classes/page_style.php
+++ b/src/mibew/libs/classes/Mibew/Style/PageStyle.php
@@ -15,13 +15,15 @@
  * limitations under the License.
  */
 
+namespace Mibew\Style;
+
 // Import namespaces and classes of the core
 use Mibew\Settings;
 
 /**
  * Represents a style for operator pages
  */
-class PageStyle extends Style implements StyleInterface {
+class PageStyle extends BaseStyle implements StyleInterface {
 	/**
 	 * Builds base path for style files. This path is relative Mibew root and
 	 * does not contain neither leading nor trailing slash.
diff --git a/src/mibew/libs/interfaces/style.php b/src/mibew/libs/classes/Mibew/Style/StyleInterface.php
similarity index 98%
rename from src/mibew/libs/interfaces/style.php
rename to src/mibew/libs/classes/Mibew/Style/StyleInterface.php
index 8ff78677..17892f91 100644
--- a/src/mibew/libs/interfaces/style.php
+++ b/src/mibew/libs/classes/Mibew/Style/StyleInterface.php
@@ -15,6 +15,8 @@
  * limitations under the License.
  */
 
+namespace Mibew\Style;
+
 /**
  * Determine interface for specific style class.
  */
diff --git a/src/mibew/libs/expand.php b/src/mibew/libs/expand.php
index 2363717d..f89ca8ed 100644
--- a/src/mibew/libs/expand.php
+++ b/src/mibew/libs/expand.php
@@ -110,7 +110,7 @@ function expandtext($text)
 	return preg_replace_callback("/\\\${(\w+:)?([\w\.,]+)}/", "expand_var", $text);
 }
 
-function expand(StyleInterface $style, $templates_root, $filename)
+function expand(\Mibew\Style\StyleInterface $style, $templates_root, $filename)
 {
 	global $page, $expand_include_path, $current_style, $flatten_page;
 
diff --git a/src/mibew/libs/getcode.php b/src/mibew/libs/getcode.php
index 804f017d..aeef3c4b 100644
--- a/src/mibew/libs/getcode.php
+++ b/src/mibew/libs/getcode.php
@@ -17,6 +17,7 @@
 
 // Import namespaces and classes of the core
 use Mibew\Settings;
+use Mibew\Style\InvitationStyle;
 
 function generate_button($title, $locale, $style, $invitation_style_name, $group, $inner, $showhost, $forcesecure, $modsecurity, $operator_code)
 {
diff --git a/src/mibew/license.php b/src/mibew/license.php
index e0615417..f83e2b1a 100644
--- a/src/mibew/license.php
+++ b/src/mibew/license.php
@@ -15,10 +15,11 @@
  * limitations under the License.
  */
 
+// Import namespaces and classes of the core
+use Mibew\Style\PageStyle;
+
+// Initialize libraries
 require_once(dirname(__FILE__).'/libs/init.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $page = array();
 $page['title'] = getlocal("license.title");
diff --git a/src/mibew/mail.php b/src/mibew/mail.php
index 26389a4a..ad37d6fb 100644
--- a/src/mibew/mail.php
+++ b/src/mibew/mail.php
@@ -18,6 +18,7 @@
 // Import namespaces and classes of the core
 use Mibew\Settings;
 use Mibew\Thread;
+use Mibew\Style\ChatStyle;
 
 // Initialize libraries
 require_once(dirname(__FILE__).'/libs/init.php');
@@ -25,9 +26,6 @@ require_once(MIBEW_FS_ROOT.'/libs/chat.php');
 require_once(MIBEW_FS_ROOT.'/libs/expand.php');
 require_once(MIBEW_FS_ROOT.'/libs/groups.php');
 require_once(MIBEW_FS_ROOT.'/libs/notify.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/chat_style.php');
 
 $errors = array();
 $page = array();
diff --git a/src/mibew/operator/agent.php b/src/mibew/operator/agent.php
index 2896c626..80f7493d 100644
--- a/src/mibew/operator/agent.php
+++ b/src/mibew/operator/agent.php
@@ -18,6 +18,8 @@
 // Import namespaces and classes of the core
 use Mibew\Settings;
 use Mibew\Thread;
+use Mibew\Style\ChatStyle;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
@@ -27,10 +29,6 @@ require_once(MIBEW_FS_ROOT.'/libs/groups.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/pagination.php');
 require_once(MIBEW_FS_ROOT.'/libs/expand.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/chat_style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 
diff --git a/src/mibew/operator/avatar.php b/src/mibew/operator/avatar.php
index 96f872a8..3e4fcfba 100644
--- a/src/mibew/operator/avatar.php
+++ b/src/mibew/operator/avatar.php
@@ -17,14 +17,12 @@
 
 // Import namespaces and classes of the core
 use Mibew\Settings;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator_settings.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 csrfchecktoken();
diff --git a/src/mibew/operator/ban.php b/src/mibew/operator/ban.php
index 0cdbcef1..5519f576 100644
--- a/src/mibew/operator/ban.php
+++ b/src/mibew/operator/ban.php
@@ -18,15 +18,13 @@
 // Import namespaces and classes of the core
 use Mibew\Database;
 use Mibew\Thread;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/chat.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/pagination.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 csrfchecktoken();
diff --git a/src/mibew/operator/blocked.php b/src/mibew/operator/blocked.php
index 7818c12d..2f7479a3 100644
--- a/src/mibew/operator/blocked.php
+++ b/src/mibew/operator/blocked.php
@@ -17,15 +17,13 @@
 
 // Import namespaces and classes of the core
 use Mibew\Database;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/chat.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/pagination.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 csrfchecktoken();
diff --git a/src/mibew/operator/canned.php b/src/mibew/operator/canned.php
index 883955fa..7fe7aa48 100644
--- a/src/mibew/operator/canned.php
+++ b/src/mibew/operator/canned.php
@@ -17,6 +17,7 @@
 
 // Import namespaces and classes of the core
 use Mibew\Database;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
@@ -25,9 +26,6 @@ require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/settings.php');
 require_once(MIBEW_FS_ROOT.'/libs/groups.php');
 require_once(MIBEW_FS_ROOT.'/libs/pagination.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 force_password($operator);
diff --git a/src/mibew/operator/cannededit.php b/src/mibew/operator/cannededit.php
index 023cc2f1..9b745b8e 100644
--- a/src/mibew/operator/cannededit.php
+++ b/src/mibew/operator/cannededit.php
@@ -15,13 +15,14 @@
  * limitations under the License.
  */
 
+// Import namespaces and classes of the core
+use Mibew\Style\PageStyle;
+
+// Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/canned.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/pagination.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 csrfchecktoken();
diff --git a/src/mibew/operator/features.php b/src/mibew/operator/features.php
index 5a497198..206eabbd 100644
--- a/src/mibew/operator/features.php
+++ b/src/mibew/operator/features.php
@@ -17,14 +17,12 @@
 
 // Import namespaces and classes of the core
 use Mibew\Settings;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/settings.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 csrfchecktoken();
diff --git a/src/mibew/operator/getcode.php b/src/mibew/operator/getcode.php
index 048724f3..5f1f3126 100644
--- a/src/mibew/operator/getcode.php
+++ b/src/mibew/operator/getcode.php
@@ -17,17 +17,15 @@
 
 // Import namespaces and classes of the core
 use Mibew\Settings;
+use Mibew\Style\ChatStyle;
+use Mibew\Style\InvitationStyle;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/groups.php');
 require_once(MIBEW_FS_ROOT.'/libs/getcode.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/chat_style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/invitation_style.php');
 
 $operator = check_login();
 force_password($operator);
diff --git a/src/mibew/operator/group.php b/src/mibew/operator/group.php
index 8a69582d..b814782a 100644
--- a/src/mibew/operator/group.php
+++ b/src/mibew/operator/group.php
@@ -17,14 +17,12 @@
 
 // Import namespaces and classes of the core
 use Mibew\Database;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/groups.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 csrfchecktoken();
diff --git a/src/mibew/operator/groupmembers.php b/src/mibew/operator/groupmembers.php
index 6d2c84d1..f5357dcb 100644
--- a/src/mibew/operator/groupmembers.php
+++ b/src/mibew/operator/groupmembers.php
@@ -17,14 +17,12 @@
 
 // Import namespaces and classes of the core
 use Mibew\Database;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/groups.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 csrfchecktoken();
diff --git a/src/mibew/operator/groups.php b/src/mibew/operator/groups.php
index dd991d55..b8a4cad2 100644
--- a/src/mibew/operator/groups.php
+++ b/src/mibew/operator/groups.php
@@ -18,13 +18,11 @@
 // Import namespaces and classes of the core
 use Mibew\Database;
 use Mibew\Settings;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 csrfchecktoken();
diff --git a/src/mibew/operator/history.php b/src/mibew/operator/history.php
index 7bb8ec7d..44925737 100644
--- a/src/mibew/operator/history.php
+++ b/src/mibew/operator/history.php
@@ -18,6 +18,7 @@
 // Import namespaces and classes of the core
 use Mibew\Database;
 use Mibew\Thread;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
@@ -26,9 +27,6 @@ require_once(MIBEW_FS_ROOT.'/libs/chat.php');
 require_once(MIBEW_FS_ROOT.'/libs/userinfo.php');
 require_once(MIBEW_FS_ROOT.'/libs/pagination.php');
 require_once(MIBEW_FS_ROOT.'/libs/cron.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 force_password($operator);
diff --git a/src/mibew/operator/index.php b/src/mibew/operator/index.php
index 12992d7c..eaf77ef7 100644
--- a/src/mibew/operator/index.php
+++ b/src/mibew/operator/index.php
@@ -17,13 +17,11 @@
 
 // Import namespaces and classes of the core
 use Mibew\Settings;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 force_password($operator);
diff --git a/src/mibew/operator/invitationthemes.php b/src/mibew/operator/invitationthemes.php
index 2b03edbf..988abd05 100644
--- a/src/mibew/operator/invitationthemes.php
+++ b/src/mibew/operator/invitationthemes.php
@@ -15,16 +15,17 @@
  * limitations under the License.
  */
 
+// Import namespaces and classes of the core
+use Mibew\Style\InvitationStyle;
+use Mibew\Style\PageStyle;
+
+// Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/pagination.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/groups.php');
 require_once(MIBEW_FS_ROOT.'/libs/expand.php');
 require_once(MIBEW_FS_ROOT.'/libs/settings.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/invitation_style.php');
 
 $operator = check_login();
 
diff --git a/src/mibew/operator/login.php b/src/mibew/operator/login.php
index 3fc10310..2dde4e4f 100644
--- a/src/mibew/operator/login.php
+++ b/src/mibew/operator/login.php
@@ -15,11 +15,12 @@
  * limitations under the License.
  */
 
+// Import namespaces and classes of the core
+use Mibew\Style\PageStyle;
+
+// Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $errors = array();
 $page = array('formisRemember' => true, 'version' => $version);
diff --git a/src/mibew/operator/operator.php b/src/mibew/operator/operator.php
index 310ac5dc..e6b653f5 100644
--- a/src/mibew/operator/operator.php
+++ b/src/mibew/operator/operator.php
@@ -15,12 +15,13 @@
  * limitations under the License.
  */
 
+// Import namespaces and classes of the core
+use Mibew\Style\PageStyle;
+
+// Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator_settings.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 csrfchecktoken();
diff --git a/src/mibew/operator/operators.php b/src/mibew/operator/operators.php
index 640fa1cb..c4a322d8 100644
--- a/src/mibew/operator/operators.php
+++ b/src/mibew/operator/operators.php
@@ -17,13 +17,11 @@
 
 // Import namespaces and classes of the core
 use Mibew\Database;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 force_password($operator);
diff --git a/src/mibew/operator/opgroups.php b/src/mibew/operator/opgroups.php
index 115f12a5..ef65c617 100644
--- a/src/mibew/operator/opgroups.php
+++ b/src/mibew/operator/opgroups.php
@@ -17,14 +17,12 @@
 
 // Import namespaces and classes of the core
 use Mibew\Database;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator_settings.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 csrfchecktoken();
diff --git a/src/mibew/operator/page_themes.php b/src/mibew/operator/page_themes.php
index b3175de1..861f3309 100644
--- a/src/mibew/operator/page_themes.php
+++ b/src/mibew/operator/page_themes.php
@@ -15,12 +15,13 @@
  * limitations under the License.
  */
 
+// Import namespaces and classes of the core
+use Mibew\Style\PageStyle;
+
+// Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/settings.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 
diff --git a/src/mibew/operator/performance.php b/src/mibew/operator/performance.php
index 255145c5..fa940ef6 100644
--- a/src/mibew/operator/performance.php
+++ b/src/mibew/operator/performance.php
@@ -17,14 +17,12 @@
 
 // Import namespaces and classes of the core
 use Mibew\Settings;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/settings.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 csrfchecktoken();
diff --git a/src/mibew/operator/permissions.php b/src/mibew/operator/permissions.php
index 9d0dcf71..2e185042 100644
--- a/src/mibew/operator/permissions.php
+++ b/src/mibew/operator/permissions.php
@@ -15,12 +15,13 @@
  * limitations under the License.
  */
 
+// Import namespaces and classes of the core
+use Mibew\Style\PageStyle;
+
+// Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator_settings.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 csrfchecktoken();
diff --git a/src/mibew/operator/redirect.php b/src/mibew/operator/redirect.php
index 8ed97fa5..20ac5b92 100644
--- a/src/mibew/operator/redirect.php
+++ b/src/mibew/operator/redirect.php
@@ -18,6 +18,7 @@
 // Import namespaces and classes of the core
 use Mibew\Database;
 use Mibew\Thread;
+use Mibew\Style\ChatStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
@@ -25,9 +26,6 @@ require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/chat.php');
 require_once(MIBEW_FS_ROOT.'/libs/expand.php');
 require_once(MIBEW_FS_ROOT.'/libs/groups.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/chat_style.php');
 
 $operator = check_login();
 
diff --git a/src/mibew/operator/resetpwd.php b/src/mibew/operator/resetpwd.php
index d5add122..182d8938 100644
--- a/src/mibew/operator/resetpwd.php
+++ b/src/mibew/operator/resetpwd.php
@@ -17,14 +17,12 @@
 
 // Import namespaces and classes of the core
 use Mibew\Database;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/settings.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $errors = array();
 $page = array(
diff --git a/src/mibew/operator/restore.php b/src/mibew/operator/restore.php
index ed2ba094..fe3362da 100644
--- a/src/mibew/operator/restore.php
+++ b/src/mibew/operator/restore.php
@@ -17,15 +17,13 @@
 
 // Import namespaces and classes of the core
 use Mibew\Database;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/settings.php');
 require_once(MIBEW_FS_ROOT.'/libs/notify.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $errors = array();
 $page = array(
diff --git a/src/mibew/operator/settings.php b/src/mibew/operator/settings.php
index e204035b..dfb94820 100644
--- a/src/mibew/operator/settings.php
+++ b/src/mibew/operator/settings.php
@@ -17,17 +17,15 @@
 
 // Import namespaces and classes of the core
 use Mibew\Settings;
+use Mibew\Style\ChatStyle;
+use Mibew\Style\InvitationStyle;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/settings.php');
 require_once(MIBEW_FS_ROOT.'/libs/cron.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/chat_style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/invitation_style.php');
 
 $operator = check_login();
 force_password($operator);
diff --git a/src/mibew/operator/statistics.php b/src/mibew/operator/statistics.php
index 67096b6c..d21f6ebf 100644
--- a/src/mibew/operator/statistics.php
+++ b/src/mibew/operator/statistics.php
@@ -18,6 +18,7 @@
 // Import namespaces and classes of the core
 use Mibew\Database;
 use Mibew\Settings;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
@@ -25,9 +26,6 @@ require_once(MIBEW_FS_ROOT.'/libs/chat.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/statistics.php');
 require_once(MIBEW_FS_ROOT.'/libs/cron.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 force_password($operator);
diff --git a/src/mibew/operator/themes.php b/src/mibew/operator/themes.php
index 1eccfd57..d3dc0fab 100644
--- a/src/mibew/operator/themes.php
+++ b/src/mibew/operator/themes.php
@@ -15,6 +15,11 @@
  * limitations under the License.
  */
 
+// Import namespaces and classes of the core
+use Mibew\Style\ChatStyle;
+use Mibew\Style\PageStyle;
+
+// Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/chat.php');
 require_once(MIBEW_FS_ROOT.'/libs/pagination.php');
@@ -22,10 +27,6 @@ require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/groups.php');
 require_once(MIBEW_FS_ROOT.'/libs/expand.php');
 require_once(MIBEW_FS_ROOT.'/libs/settings.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/chat_style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 
diff --git a/src/mibew/operator/threadprocessor.php b/src/mibew/operator/threadprocessor.php
index 4cd26d8f..dcdb5827 100644
--- a/src/mibew/operator/threadprocessor.php
+++ b/src/mibew/operator/threadprocessor.php
@@ -18,15 +18,13 @@
 // Import namespaces and classes of the core
 use Mibew\Database;
 use Mibew\Thread;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/chat.php');
 require_once(MIBEW_FS_ROOT.'/libs/userinfo.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 
diff --git a/src/mibew/operator/tracked.php b/src/mibew/operator/tracked.php
index 54fc576c..c43d0ec2 100644
--- a/src/mibew/operator/tracked.php
+++ b/src/mibew/operator/tracked.php
@@ -17,15 +17,13 @@
 
 // Import namespaces and classes of the core
 use Mibew\Settings;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/chat.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/track.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 
diff --git a/src/mibew/operator/translate.php b/src/mibew/operator/translate.php
index 48f10433..58fafa09 100644
--- a/src/mibew/operator/translate.php
+++ b/src/mibew/operator/translate.php
@@ -15,12 +15,13 @@
  * limitations under the License.
  */
 
+// Import namespaces and classes of the core
+use Mibew\Style\PageStyle;
+
+// Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/pagination.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 function compare_localization_by_l1($a, $b)
 {
diff --git a/src/mibew/operator/updates.php b/src/mibew/operator/updates.php
index 0df774bd..4c72cbfe 100644
--- a/src/mibew/operator/updates.php
+++ b/src/mibew/operator/updates.php
@@ -15,12 +15,13 @@
  * limitations under the License.
  */
 
+// Import namespaces and classes of the core
+use Mibew\Style\PageStyle;
+
+// Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/settings.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 force_password($operator);
diff --git a/src/mibew/operator/userhistory.php b/src/mibew/operator/userhistory.php
index f2c5c6cb..26ae0f0f 100644
--- a/src/mibew/operator/userhistory.php
+++ b/src/mibew/operator/userhistory.php
@@ -18,6 +18,7 @@
 // Import namespaces and classes of the core
 use Mibew\Database;
 use Mibew\Thread;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
@@ -25,9 +26,6 @@ require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/chat.php');
 require_once(MIBEW_FS_ROOT.'/libs/userinfo.php');
 require_once(MIBEW_FS_ROOT.'/libs/pagination.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 
 $operator = check_login();
diff --git a/src/mibew/operator/users.php b/src/mibew/operator/users.php
index 574c11f2..42635338 100644
--- a/src/mibew/operator/users.php
+++ b/src/mibew/operator/users.php
@@ -17,15 +17,13 @@
 
 // Import namespaces and classes of the core
 use Mibew\Settings;
+use Mibew\Style\ChatStyle;
+use Mibew\Style\PageStyle;
 
 // Initialize libraries
 require_once(dirname(dirname(__FILE__)).'/libs/init.php');
 require_once(MIBEW_FS_ROOT.'/libs/operator.php');
 require_once(MIBEW_FS_ROOT.'/libs/groups.php');
-require_once(MIBEW_FS_ROOT.'/libs/interfaces/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/chat_style.php');
-require_once(MIBEW_FS_ROOT.'/libs/classes/page_style.php');
 
 $operator = check_login();
 force_password($operator);