diff --git a/application/controllers/AuthenticationController.php b/application/controllers/AuthenticationController.php
index 4ea5043d0..bf9d0a655 100644
--- a/application/controllers/AuthenticationController.php
+++ b/application/controllers/AuthenticationController.php
@@ -6,6 +6,7 @@ namespace Icinga\Controllers;
 use Icinga\Application\Icinga;
 use Icinga\Forms\Authentication\LoginForm;
 use Icinga\Web\Controller;
+use Icinga\Web\Helper\CookieHelper;
 use Icinga\Web\Url;
 
 /**
@@ -37,13 +38,14 @@ class AuthenticationController extends Controller
             $this->redirectNow($form->getRedirectUrl());
         }
         if (! $requiresSetup) {
-            if (! $this->getRequest()->hasCookieSupport()) {
+            $cookies = new CookieHelper($this->getRequest());
+            if (! $cookies->isSupported()) {
                 $this
                     ->getResponse()
                     ->setBody("Cookies must be enabled to run this application.\n")
                     ->setHttpResponseCode(403)
                     ->sendResponse();
-                exit();
+                exit;
             }
             $form->handleRequest();
         }
diff --git a/application/controllers/ErrorController.php b/application/controllers/ErrorController.php
index ed35c3162..c7c998101 100644
--- a/application/controllers/ErrorController.php
+++ b/application/controllers/ErrorController.php
@@ -36,7 +36,7 @@ class ErrorController extends ActionController
         Logger::error('Stacktrace: %s', $exception->getTraceAsString());
 
         if (! ($isAuthenticated = $this->Auth()->isAuthenticated())) {
-            $this->innerLayout = 'error';
+            $this->innerLayout = 'guest-error';
         }
 
         switch ($error->type) {
@@ -89,6 +89,7 @@ class ErrorController extends ActionController
                 if ($this->getInvokeArg('displayExceptions')) {
                     $this->view->stackTrace = $exception->getTraceAsString();
                 }
+
                 break;
         }
 
diff --git a/application/controllers/StaticController.php b/application/controllers/StaticController.php
index 7c284d567..79632e1d8 100644
--- a/application/controllers/StaticController.php
+++ b/application/controllers/StaticController.php
@@ -7,7 +7,6 @@ use Icinga\Web\Controller;
 use Icinga\Application\Icinga;
 use Icinga\Application\Logger;
 use Icinga\Web\FileCache;
-use Icinga\Web\LessCompiler;
 
 /**
  * Delivery static content to clients
@@ -87,94 +86,4 @@ class StaticController extends Controller
 
         readfile($filePath);
     }
-
-    /**
-     * Return a javascript file from the application's or the module's public folder
-     */
-    public function javascriptAction()
-    {
-        $module = $this->_getParam('module_name');
-        $file   = $this->_getParam('file');
-
-        if ($module == 'app') {
-            $basedir = Icinga::app()->getApplicationDir('../public/js/icinga/components/');
-            $filePath = $basedir . $file;
-        } else {
-            if (! Icinga::app()->getModuleManager()->hasEnabled($module)) {
-                Logger::error(
-                    'Non-existing frontend component "' . $module . '/' . $file
-                    . '" was requested. The module "' . $module . '" does not exist or is not active.'
-                );
-                echo "/** Module not enabled **/";
-                return;
-            }
-            $basedir = Icinga::app()->getModuleManager()->getModule($module)->getBaseDir();
-            $filePath = $basedir . '/public/js/' . $file;
-        }
-
-        if (! file_exists($filePath)) {
-            Logger::error(
-                'Non-existing frontend component "' . $module . '/' . $file
-                . '" was requested, which would resolve to the the path: ' . $filePath
-            );
-            echo '/** Module has no js files **/';
-            return;
-        }
-        $response = $this->getResponse();
-        $response->setHeader('Content-Type', 'text/javascript');
-        $this->setCacheHeader();
-
-        $response->setHeader(
-            'Last-Modified',
-            gmdate('D, d M Y H:i:s', filemtime($filePath)) . ' GMT'
-        );
-
-        readfile($filePath);
-    }
-
-    /**
-     * Set cache header for the response
-     *
-     * @param int $maxAge The maximum age to set
-     */
-    private function setCacheHeader($maxAge = 3600)
-    {
-        $maxAge = (int) $maxAge;
-        $this
-            ->getResponse()
-            ->setHeader('Cache-Control', sprintf('max-age=%d', $maxAge), true)
-            ->setHeader('Pragma', 'cache', true)
-            ->setHeader(
-                'Expires',
-                gmdate('D, d M Y H:i:s', time() + $maxAge) . ' GMT',
-                true
-            );
-    }
-
-    /**
-     * Send application's and modules' CSS
-     */
-    public function stylesheetAction()
-    {
-        $lessCompiler = new LessCompiler();
-        $moduleManager = Icinga::app()->getModuleManager();
-
-        $publicDir = realpath(dirname($_SERVER['SCRIPT_FILENAME']));
-
-        $lessCompiler->addItem($publicDir . '/css/vendor');
-        $lessCompiler->addItem($publicDir . '/css/icinga');
-
-        foreach ($moduleManager->getLoadedModules() as $moduleName) {
-            $cssDir = $moduleName->getCssDir();
-
-            if (is_dir($cssDir)) {
-                $lessCompiler->addItem($cssDir);
-            }
-        }
-
-        $this->getResponse()->setHeader('Content-Type', 'text/css');
-        $this->setCacheHeader(3600);
-
-        $lessCompiler->printStack();
-    }
 }
diff --git a/application/forms/Config/General/ApplicationConfigForm.php b/application/forms/Config/General/ApplicationConfigForm.php
index 4e431aab2..da0b4e451 100644
--- a/application/forms/Config/General/ApplicationConfigForm.php
+++ b/application/forms/Config/General/ApplicationConfigForm.php
@@ -8,12 +8,14 @@ use Icinga\Data\ResourceFactory;
 use Icinga\Web\Form;
 
 /**
- * Form class to modify the general application configuration
+ * Configuration form for general application options
+ *
+ * This form is not used directly but as subform to the {@link GeneralConfigForm}.
  */
 class ApplicationConfigForm extends Form
 {
     /**
-     * Initialize this form
+     * {@inheritdoc}
      */
     public function init()
     {
@@ -21,7 +23,9 @@ class ApplicationConfigForm extends Form
     }
 
     /**
-     * @see Form::createElements()
+     * {@inheritdoc}
+     *
+     * @return  $this
      */
     public function createElements(array $formData)
     {
@@ -68,6 +72,7 @@ class ApplicationConfigForm extends Form
                 )
             )
         );
+
         if (isset($formData['global_config_backend']) && $formData['global_config_backend'] === 'db') {
             $backends = array();
             foreach (ResourceFactory::getResourceConfigs()->toArray() as $name => $resource) {
diff --git a/application/forms/Config/General/LoggingConfigForm.php b/application/forms/Config/General/LoggingConfigForm.php
index 3690b8060..89aec7538 100644
--- a/application/forms/Config/General/LoggingConfigForm.php
+++ b/application/forms/Config/General/LoggingConfigForm.php
@@ -6,10 +6,15 @@ namespace Icinga\Forms\Config\General;
 use Icinga\Application\Logger;
 use Icinga\Web\Form;
 
+/**
+ * Configuration form for logging options
+ *
+ * This form is not used directly but as subform for the {@link GeneralConfigForm}.
+ */
 class LoggingConfigForm extends Form
 {
     /**
-     * Initialize this form
+     * {@inheritdoc}
      */
     public function init()
     {
@@ -17,8 +22,9 @@ class LoggingConfigForm extends Form
     }
 
     /**
-     * (non-PHPDoc)
-     * @see Form::createElements() For the method documentation.
+     * {@inheritdoc}
+     *
+     * @return  $this
      */
     public function createElements(array $formData)
     {
diff --git a/application/forms/Config/General/ThemingConfigForm.php b/application/forms/Config/General/ThemingConfigForm.php
new file mode 100644
index 000000000..be35a2fb2
--- /dev/null
+++ b/application/forms/Config/General/ThemingConfigForm.php
@@ -0,0 +1,72 @@
+<?php
+/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
+
+namespace Icinga\Forms\Config\General;
+
+use Icinga\Application\Icinga;
+use Icinga\Application\Logger;
+use Icinga\Web\Form;
+
+/**
+ * Configuration form for theming options
+ *
+ * This form is not used directly but as subform for the {@link GeneralConfigForm}.
+ */
+class ThemingConfigForm extends Form
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function init()
+    {
+        $this->setName('form_config_general_theming');
+    }
+
+    /**
+     * {@inheritdoc}
+     *
+     * @return  $this
+     */
+    public function createElements(array $formData)
+    {
+        $this->addElement(
+            'select',
+            'themes_default',
+            array(
+                'description'   => $this->translate('The default theme', 'Form element description'),
+                'label'         => $this->translate('Default Theme', 'Form element label'),
+                'multiOptions'  => Icinga::app()->getThemes()
+            )
+        );
+
+        $this->addElement(
+            'checkbox',
+            'themes_disabled',
+            array(
+                'description'   => $this->translate(
+                    'Check this box for disallowing users to change the theme. If a default theme is set, it will be'
+                    . ' used nonetheless',
+                    'Form element description'
+                ),
+                'label'         => $this->translate('Disable Themes', 'Form element label')
+            )
+        );
+
+        return $this;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getValues($suppressArrayNotation = false)
+    {
+        $values = parent::getValues($suppressArrayNotation);
+        if ($values['themes_default'] === 'Icinga') {
+            $values['themes_default'] = null;
+        }
+        if (! $values['themes_disabled']) {
+            $values['themes_disabled'] = null;
+        }
+        return $values;
+    }
+}
diff --git a/application/forms/Config/GeneralConfigForm.php b/application/forms/Config/GeneralConfigForm.php
index 5b00d06f4..5df09a140 100644
--- a/application/forms/Config/GeneralConfigForm.php
+++ b/application/forms/Config/GeneralConfigForm.php
@@ -5,15 +5,16 @@ namespace Icinga\Forms\Config;
 
 use Icinga\Forms\Config\General\ApplicationConfigForm;
 use Icinga\Forms\Config\General\LoggingConfigForm;
+use Icinga\Forms\Config\General\ThemingConfigForm;
 use Icinga\Forms\ConfigForm;
 
 /**
- * Form class for application-wide and logging specific settings
+ * Configuration form for application-wide options
  */
 class GeneralConfigForm extends ConfigForm
 {
     /**
-     * Initialize this configuration form
+     * {@inheritdoc}
      */
     public function init()
     {
@@ -22,13 +23,15 @@ class GeneralConfigForm extends ConfigForm
     }
 
     /**
-     * @see Form::createElements()
+     * {@inheritdoc}
      */
     public function createElements(array $formData)
     {
         $appConfigForm = new ApplicationConfigForm();
         $loggingConfigForm = new LoggingConfigForm();
-        $this->addElements($appConfigForm->createElements($formData)->getElements());
-        $this->addElements($loggingConfigForm->createElements($formData)->getElements());
+        $themingConfigForm = new ThemingConfigForm();
+        $this->addSubForm($appConfigForm->create($formData));
+        $this->addSubForm($loggingConfigForm->create($formData));
+        $this->addSubForm($themingConfigForm->create($formData));
     }
 }
diff --git a/application/forms/Config/UserBackendConfigForm.php b/application/forms/Config/UserBackendConfigForm.php
index 55ec88833..524facfb8 100644
--- a/application/forms/Config/UserBackendConfigForm.php
+++ b/application/forms/Config/UserBackendConfigForm.php
@@ -321,21 +321,6 @@ class UserBackendConfigForm extends ConfigForm
         }
     }
 
-    /**
-     * Retrieve all form element values
-     *
-     * @param   bool    $suppressArrayNotation  Ignored
-     *
-     * @return  array
-     */
-    public function getValues($suppressArrayNotation = false)
-    {
-        $values = parent::getValues();
-        $values = array_merge($values, $values['backend_form']);
-        unset($values['backend_form']);
-        return $values;
-    }
-
     /**
      * Return whether the given values are valid
      *
diff --git a/application/forms/Config/UserGroup/UserGroupBackendForm.php b/application/forms/Config/UserGroup/UserGroupBackendForm.php
index 7f57408c7..da0337dba 100644
--- a/application/forms/Config/UserGroup/UserGroupBackendForm.php
+++ b/application/forms/Config/UserGroup/UserGroupBackendForm.php
@@ -198,19 +198,4 @@ class UserGroupBackendForm extends ConfigForm
             $this->populate($data);
         }
     }
-
-    /**
-     * Retrieve all form element values
-     *
-     * @param   bool    $suppressArrayNotation  Ignored
-     *
-     * @return  array
-     */
-    public function getValues($suppressArrayNotation = false)
-    {
-        $values = parent::getValues();
-        $values = array_merge($values, $values['backend_form']);
-        unset($values['backend_form']);
-        return $values;
-    }
 }
diff --git a/application/forms/ConfigForm.php b/application/forms/ConfigForm.php
index 3d6d85dc7..70399c970 100644
--- a/application/forms/ConfigForm.php
+++ b/application/forms/ConfigForm.php
@@ -5,9 +5,9 @@ namespace Icinga\Forms;
 
 use Exception;
 use Zend_Form_Decorator_Abstract;
+use Icinga\Application\Config;
 use Icinga\Web\Form;
 use Icinga\Web\Notification;
-use Icinga\Application\Config;
 
 /**
  * Form base-class providing standard functionality for configuration forms
@@ -21,6 +21,23 @@ class ConfigForm extends Form
      */
     protected $config;
 
+    /**
+     * {@inheritdoc}
+     *
+     * Values from subforms are directly added to the returned values array instead of being grouped by the subforms'
+     * names.
+     */
+    public function getValues($suppressArrayNotation = false)
+    {
+        $values = parent::getValues($suppressArrayNotation);
+        foreach (array_keys($this->_subForms) as $name) {
+            // Zend returns values from subforms grouped by their names, but we want them flat
+            $values = array_merge($values, $values[$name]);
+            unset($values[$name]);
+        }
+        return $values;
+    }
+
     /**
      * Set the configuration to use when populating the form or when saving the user's input
      *
diff --git a/application/forms/Navigation/NavigationConfigForm.php b/application/forms/Navigation/NavigationConfigForm.php
index c06c75aab..d6c7d7de1 100644
--- a/application/forms/Navigation/NavigationConfigForm.php
+++ b/application/forms/Navigation/NavigationConfigForm.php
@@ -761,17 +761,6 @@ class NavigationConfigForm extends ConfigForm
         return $valid;
     }
 
-    /**
-     * {@inheritdoc}
-     */
-    public function getValues($suppressArrayNotation = false)
-    {
-        $values = parent::getValues();
-        $values = array_merge($values, $values['item_form']);
-        unset($values['item_form']);
-        return $values;
-    }
-
     /**
      * {@inheritdoc}
      */
diff --git a/application/forms/PreferenceForm.php b/application/forms/PreferenceForm.php
index d8ab9f2b1..f0d50b466 100644
--- a/application/forms/PreferenceForm.php
+++ b/application/forms/PreferenceForm.php
@@ -6,12 +6,14 @@ namespace Icinga\Forms;
 use Exception;
 use DateTimeZone;
 use Icinga\Application\Config;
+use Icinga\Application\Icinga;
 use Icinga\Application\Logger;
 use Icinga\Authentication\Auth;
 use Icinga\User\Preferences;
 use Icinga\User\Preferences\PreferencesStore;
 use Icinga\Util\TimezoneDetect;
 use Icinga\Util\Translator;
+use Icinga\Web\Cookie;
 use Icinga\Web\Form;
 use Icinga\Web\Notification;
 use Icinga\Web\Session;
@@ -103,6 +105,14 @@ class PreferenceForm extends Form
 
         Session::getSession()->user->setPreferences($this->preferences);
 
+        if (($theme = $this->getElement('theme')) !== null
+            && ($theme = $theme->getValue()) !== $this->getRequest()->getCookie('theme')
+        ) {
+            $this->getResponse()
+                ->setCookie(new Cookie('theme', $theme))
+                ->setReloadCss(true);
+        }
+
         try {
             if ($this->store && $this->getElement('btn_submit_preferences')->isChecked()) {
                 $this->save();
@@ -142,6 +152,20 @@ class PreferenceForm extends Form
      */
     public function createElements(array $formData)
     {
+        if (! (bool) Config::app()->get('themes', 'disabled', false)) {
+            $themes = Icinga::app()->getThemes();
+            if (count($themes) > 1) {
+                $this->addElement(
+                    'select',
+                    'theme',
+                    array(
+                        'label'         => $this->translate('Theme', 'Form element label'),
+                        'multiOptions'  => $themes
+                    )
+                );
+            }
+        }
+
         $languages = array();
         $languages['autodetect'] = sprintf($this->translate('Browser (%s)', 'preferences.form'), $this->getLocale());
         foreach (Translator::getAvailableLocaleCodes() as $language) {
diff --git a/application/forms/Security/RoleForm.php b/application/forms/Security/RoleForm.php
index 9ebfc2c91..96560726b 100644
--- a/application/forms/Security/RoleForm.php
+++ b/application/forms/Security/RoleForm.php
@@ -42,33 +42,7 @@ class RoleForm extends ConfigForm
             'application/stacktraces'                       => $this->translate(
                 'Allow to adjust in the preferences whether to show stacktraces'
             ) . ' (application/stacktraces)',
-            'config/*'                                      => $this->translate('Allow config access') . ' (config/*)',
-/*
-            // [tg] seems excessive for me, hidden for rc1, tbd
-            'config/application/*'                          => 'config/application/*',
-            'config/application/general'                    => 'config/application/general',
-            'config/application/resources'                  => 'config/application/resources',
-            'config/application/userbackend'                => 'config/application/userbackend',
-            'config/application/usergroupbackend'           => 'config/application/usergroupbackend',
-            'config/application/navigation'                 => 'config/application/navigation',
-            'config/authentication/*'                       => 'config/authentication/*',
-            'config/authentication/users/*'                 => 'config/authentication/users/*',
-            'config/authentication/users/show'              => 'config/authentication/users/show',
-            'config/authentication/users/add'               => 'config/authentication/users/add',
-            'config/authentication/users/edit'              => 'config/authentication/users/edit',
-            'config/authentication/users/remove'            => 'config/authentication/users/remove',
-            'config/authentication/groups/*'                => 'config/authentication/groups/*',
-            'config/authentication/groups/show'             => 'config/authentication/groups/show',
-            'config/authentication/groups/add'              => 'config/authentication/groups/add',
-            'config/authentication/groups/edit'             => 'config/authentication/groups/edit',
-            'config/authentication/groups/remove'           => 'config/authentication/groups/remove',
-            'config/authentication/roles/*'                 => 'config/authentication/roles/*',
-            'config/authentication/roles/show'              => 'config/authentication/roles/show',
-            'config/authentication/roles/add'               => 'config/authentication/roles/add',
-            'config/authentication/roles/edit'              => 'config/authentication/roles/edit',
-            'config/authentication/roles/remove'            => 'config/authentication/roles/remove',
-            'config/modules'                                => 'config/modules'
-*/
+            'config/*'                                      => $this->translate('Allow config access') . ' (config/*)'
         );
 
         $helper = new Zend_Form_Element('bogus');
diff --git a/application/layouts/scripts/body.phtml b/application/layouts/scripts/body.phtml
index a492f8676..936c5eb1d 100644
--- a/application/layouts/scripts/body.phtml
+++ b/application/layouts/scripts/body.phtml
@@ -18,22 +18,18 @@ if ($this->layout()->autorefreshInterval) {
 
 ?>
 <div id="header">
-  <div id="logo">
-  <?php if (Auth::getInstance()->isAuthenticated()): ?>
+  <div id="header-logo-container">
     <?= $this->qlink(
       '',
-      'dashboard',
+      Auth::getInstance()->isAuthenticated() ? 'dashboard' : '',
       null,
       array(
-        'icon'              => 'img/logo_icinga-inv.png',
-        'data-base-target'  => '_main',
         'aria-hidden'       => 'true',
+        'data-base-target'  => '_main',
+        'id'                => 'header-logo',
         'tabindex'          => -1
       )
     ); ?>
-  <?php else: ?>
-    <?= $this->icon('img/logo_icinga-inv.png'); ?>
-  <?php endif ?>
   </div>
 </div>
 <?php if (! $this->layout()->isIframe): ?>
diff --git a/application/layouts/scripts/error.phtml b/application/layouts/scripts/error.phtml
deleted file mode 100644
index c0ffd3394..000000000
--- a/application/layouts/scripts/error.phtml
+++ /dev/null
@@ -1,8 +0,0 @@
-<div class="logo">
- <div class="image">
-  <img aria-hidden="true" src="<?= $this->baseUrl('img/logo_icinga_big.png'); ?>" alt="<?= $this->translate('The Icinga logo'); ?>" >
- </div>
-</div>
-<div class="below-logo">
-  <?= $this->render('inline.phtml') ?>
-</div>
diff --git a/application/layouts/scripts/guest-error.phtml b/application/layouts/scripts/guest-error.phtml
new file mode 100644
index 000000000..49cdd68f5
--- /dev/null
+++ b/application/layouts/scripts/guest-error.phtml
@@ -0,0 +1,10 @@
+<div id="guest-error">
+    <div class="centered-ghost">
+        <div class="centered-content">
+            <div id="icinga-logo" aria-hidden="true"></div>
+            <div id="guest-error-message">
+                <?= $this->render('inline.phtml') ?>
+            </div>
+        </div>
+    </div>
+</div>
diff --git a/application/layouts/scripts/inline.phtml b/application/layouts/scripts/inline.phtml
index 1157e8ca9..47d5672fa 100644
--- a/application/layouts/scripts/inline.phtml
+++ b/application/layouts/scripts/inline.phtml
@@ -1,4 +1,2 @@
-<?= $this->layout()->moduleStart ?>
 <?= $this->layout()->content ?>
 <?= $this->layout()->benchmark ?>
-<?= $this->layout()->moduleEnd ?>
diff --git a/application/layouts/scripts/layout.phtml b/application/layouts/scripts/layout.phtml
index b2c14dba0..85ba5f4c5 100644
--- a/application/layouts/scripts/layout.phtml
+++ b/application/layouts/scripts/layout.phtml
@@ -41,15 +41,14 @@ $innerLayoutScript = $this->layout()->innerLayout . '.phtml';
   }());
   </script>
 <?php endif ?>
-  <link rel="stylesheet" href="<?= $this->href($cssfile) ?>" media="screen" type="text/css" />
+  <link rel="stylesheet" href="<?= $this->href($cssfile) ?>" media="all" type="text/css" />
   <!-- Respond.js IE8 support of media queries -->
   <!--[if lt IE 9]>
   <script src="<?= $this->baseUrl('js/vendor/respond.min.js');?>"></script>
   <![endif]-->
   <link type="image/png" rel="shortcut icon" href="<?= $this->baseUrl('img/favicon.png') ?>" />
-
 </head>
-<body id="body">
+<body id="body" class="loading">
 <pre id="responsive-debug"></pre>
 <div id="layout" class="default-layout<?php if ($showFullscreen): ?> fullscreen-layout<?php endif ?>">
 <?= $this->render($innerLayoutScript); ?>
diff --git a/application/layouts/scripts/pdf.phtml b/application/layouts/scripts/pdf.phtml
index ed8e12780..68c341e01 100644
--- a/application/layouts/scripts/pdf.phtml
+++ b/application/layouts/scripts/pdf.phtml
@@ -15,7 +15,7 @@ if ($moduleName !== 'default') {
 <html>
 <head>
 <style>
-<?= StyleSheet::compileForPdf() ?>
+<?= StyleSheet::forPdf() ?>
 </style>
 
 </head>
diff --git a/application/views/scripts/authentication/login.phtml b/application/views/scripts/authentication/login.phtml
index 47002d90f..3446b4de3 100644
--- a/application/views/scripts/authentication/login.phtml
+++ b/application/views/scripts/authentication/login.phtml
@@ -1,55 +1,51 @@
- <div id="login">
-  <div class="logo">
-   <div class="image">
-    <img aria-hidden="true" class="fade-in one" src="<?= $this->baseUrl('img/logo_icinga_big.png'); ?>" alt="<?= $this->translate('The Icinga logo'); ?>" >
-   </div>
-  </div>
-  <div class="form" data-base-target="layout">
-    <?php if ($requiresSetup): ?>
-    <p class="config-note"><?= sprintf(
-      $this->translate(
-        'It appears that you did not configure Icinga Web 2 yet so it\'s not possible to log in without any defined '
-        . 'authentication method. Please define a authentication method by following the instructions in the'
-        . ' %1$sdocumentation%3$s or by using our %2$sweb-based setup-wizard%3$s.'
-      ),
-      '<a href="http://docs.icinga.org/" title="' . $this->translate('Icinga Web 2 Documentation') . '">', // TODO: More exact documentation link..
-      '<a href="' . $this->href('setup') . '" title="' . $this->translate('Icinga Web 2 Setup-Wizard') . '">',
-      '</a>'
-    ); ?></p>
-    <?php endif ?>
-    <?= $this->form ?>
-    <div class="footer">
-      Icinga Web 2 &copy; 2013-<?= date('Y'); ?><br><br>
-      <?= $this->qlink($this->translate('The Icinga Project'), 'https://www.icinga.org'); ?>
-      <?= $this->qlink(
-        null,
-        'http://www.twitter.com/icinga',
-        null,
-        array(
-          'target'  => '_blank',
-          'icon'    => 'twitter',
-          'title'   => $this->translate('Icinga on Twitter')
-        )
-      ); ?>
-      <?= $this->qlink(
-        null,
-        'http://www.facebook.com/icinga',
-        null,
-        array(
-          'target'  => '_blank',
-         'icon'     => 'facebook-squared',
-         'title'    => $this->translate('Icinga on Facebook')
-        )
-      ) ?> <?= $this->qlink(
-          null,
-          'https://plus.google.com/+icinga',
-          null,
-          array(
-              'target'    => '_blank',
-              'icon'      => 'gplus-squared',
-              'title'     => $this->translate('Icinga on Google+')
-          )
-      ); ?>
+<div id="login" class="centered-ghost">
+    <div class="centered-content" data-base-target="layout">
+        <div id="icinga-logo" aria-hidden="true"></div>
+        <?php if ($requiresSetup): ?>
+            <p class="config-note"><?= sprintf(
+                $this->translate(
+                    'It appears that you did not configure Icinga Web 2 yet so it\'s not possible to log in without any defined '
+                    . 'authentication method. Please define a authentication method by following the instructions in the'
+                    . ' %1$sdocumentation%3$s or by using our %2$sweb-based setup-wizard%3$s.'
+                ),
+                '<a href="http://docs.icinga.org/" title="' . $this->translate('Icinga Web 2 Documentation') . '">', // TODO: More exact documentation link
+                '<a href="' . $this->href('setup') . '" title="' . $this->translate('Icinga Web 2 Setup-Wizard') . '">',
+                '</a>'
+            ) ?></p>
+        <?php endif ?>
+        <?= $this->form ?>
+        <div id="login-footer">
+            <p>Icinga Web 2 &copy; 2013-<?= date('Y') ?></p>
+            <?= $this->qlink($this->translate('The Icinga Project'), 'https://www.icinga.org') ?>
+            <?= $this->qlink(
+                null,
+                'http://www.twitter.com/icinga',
+                null,
+                array(
+                    'target'  => '_blank',
+                    'icon'    => 'twitter',
+                    'title'   => $this->translate('Icinga on Twitter')
+                )
+            ) ?>
+            <?= $this->qlink(
+                null,
+                'http://www.facebook.com/icinga',
+                null,
+                array(
+                    'target'  => '_blank',
+                    'icon'     => 'facebook-squared',
+                    'title'    => $this->translate('Icinga on Facebook')
+                )
+            ) ?> <?= $this->qlink(
+                null,
+                'https://plus.google.com/+icinga',
+                null,
+                array(
+                    'target'    => '_blank',
+                    'icon'      => 'gplus-squared',
+                    'title'     => $this->translate('Icinga on Google+')
+                )
+            ) ?>
+        </div>
     </div>
-  </div>
- </div>
+</div>
diff --git a/application/views/scripts/error/error.phtml b/application/views/scripts/error/error.phtml
index aeef97e91..9599cb888 100644
--- a/application/views/scripts/error/error.phtml
+++ b/application/views/scripts/error/error.phtml
@@ -1,12 +1,12 @@
-<?php if (! $this->compact && !$hideControls): ?>
+<?php if (! $this->compact && ! $hideControls): ?>
 <div class="controls">
-    <?= $tabs->showOnlyCloseButton(); ?>
+    <?= $tabs->showOnlyCloseButton() ?>
 </div>
 <?php endif ?>
 <div class="content">
-    <p><strong><?= nl2br($this->escape($message)); ?></strong></p>
+    <p class="error-message"><?= nl2br($this->escape($message)) ?></p>
     <?php if (isset($stackTrace)): ?>
         <hr />
         <pre><?= $this->escape($stackTrace) ?></pre>
     <?php endif ?>
-</div>
\ No newline at end of file
+</div>
diff --git a/application/views/scripts/group/list.phtml b/application/views/scripts/group/list.phtml
index 12e1bd51e..cf0645633 100644
--- a/application/views/scripts/group/list.phtml
+++ b/application/views/scripts/group/list.phtml
@@ -4,7 +4,7 @@ use Icinga\Data\Extensible;
 use Icinga\Data\Reducible;
 
 if (! $this->compact): ?>
-<div class="controls separated dont-print">
+<div class="controls separated">
     <?= $tabs; ?>
     <div class="grid">
         <?= $this->sortBox ?>
diff --git a/application/views/scripts/group/show.phtml b/application/views/scripts/group/show.phtml
index a460c7ece..0394fd2f5 100644
--- a/application/views/scripts/group/show.phtml
+++ b/application/views/scripts/group/show.phtml
@@ -23,7 +23,7 @@ if ($this->hasPermission('config/authentication/groups/edit') && $backend instan
 }
 
 ?>
-<div class="controls separated dont-print">
+<div class="controls separated">
 <?php if (! $this->compact): ?>
     <?= $tabs; ?>
 <?php endif ?>
diff --git a/application/views/scripts/user/list.phtml b/application/views/scripts/user/list.phtml
index 6ed523198..182e26e87 100644
--- a/application/views/scripts/user/list.phtml
+++ b/application/views/scripts/user/list.phtml
@@ -4,7 +4,7 @@ use Icinga\Data\Extensible;
 use Icinga\Data\Reducible;
 
 if (! $this->compact): ?>
-<div class="controls separated dont-print">
+<div class="controls separated">
     <?= $tabs ?>
     <div class="grid">
         <?= $this->sortBox ?>
diff --git a/application/views/scripts/user/show.phtml b/application/views/scripts/user/show.phtml
index 2fc476bed..5aabdd11a 100644
--- a/application/views/scripts/user/show.phtml
+++ b/application/views/scripts/user/show.phtml
@@ -22,7 +22,7 @@ if ($this->hasPermission('config/authentication/users/edit') && $backend instanc
 }
 
 ?>
-<div class="controls separated dont-print">
+<div class="controls separated">
 <?php if (! $this->compact): ?>
     <?= $tabs; ?>
 <?php endif ?>
diff --git a/library/Icinga/Application/EmbeddedWeb.php b/library/Icinga/Application/EmbeddedWeb.php
index b2d8ec046..31a0cde80 100644
--- a/library/Icinga/Application/EmbeddedWeb.php
+++ b/library/Icinga/Application/EmbeddedWeb.php
@@ -20,7 +20,7 @@ use Icinga\Web\Response;
 class EmbeddedWeb extends ApplicationBootstrap
 {
     /**
-     * Request object
+     * Request
      *
      * @var Request
      */
@@ -57,6 +57,7 @@ class EmbeddedWeb extends ApplicationBootstrap
      * Embedded bootstrap parts
      *
      * @see    ApplicationBootstrap::bootstrap
+     *
      * @return $this
      */
     protected function bootstrap()
@@ -65,6 +66,8 @@ class EmbeddedWeb extends ApplicationBootstrap
             ->setupZendAutoloader()
             ->setupErrorHandling()
             ->loadConfig()
+            ->setupLogging()
+            ->setupLogger()
             ->setupRequest()
             ->setupResponse()
             ->setupTimezone()
diff --git a/library/Icinga/Application/Web.php b/library/Icinga/Application/Web.php
index 889050784..5bebde085 100644
--- a/library/Icinga/Application/Web.php
+++ b/library/Icinga/Application/Web.php
@@ -13,6 +13,7 @@ use Zend_Paginator;
 use Zend_View_Helper_PaginationControl;
 use Icinga\Authentication\Auth;
 use Icinga\User;
+use Icinga\Util\DirectoryIterator;
 use Icinga\Util\TimezoneDetect;
 use Icinga\Util\Translator;
 use Icinga\Web\Controller\Dispatcher;
@@ -20,6 +21,7 @@ use Icinga\Web\Navigation\Navigation;
 use Icinga\Web\Notification;
 use Icinga\Web\Session;
 use Icinga\Web\Session\Session as BaseSession;
+use Icinga\Web\StyleSheet;
 use Icinga\Web\View;
 
 /**
@@ -98,6 +100,33 @@ class Web extends EmbeddedWeb
             ->setupPagination();
     }
 
+    /**
+     * Get themes provided by Web 2 and all enabled modules
+     *
+     * @return  string[]    Array of theme names as keys and values
+     */
+    public function getThemes()
+    {
+        $themes = array(StyleSheet::DEFAULT_THEME);
+        $applicationThemePath = $this->getBaseDir('public/css/themes');
+        if (DirectoryIterator::isReadable($applicationThemePath)) {
+            foreach (new DirectoryIterator($applicationThemePath, 'less') as $name => $theme) {
+                $themes[] = substr($name, 0, -5);
+            }
+        }
+        $mm = $this->getModuleManager();
+        foreach ($mm->listEnabledModules() as $moduleName) {
+            $moduleThemePath = $mm->getModule($moduleName)->getCssDir() . '/themes';
+            if (! DirectoryIterator::isReadable($moduleThemePath)) {
+                continue;
+            }
+            foreach (new DirectoryIterator($moduleThemePath, 'less') as $name => $theme) {
+                $themes[] = $moduleName . '/' . substr($name, 0, -5);
+            }
+        }
+        return array_combine($themes, $themes);
+    }
+
     /**
      * Prepare routing
      *
diff --git a/library/Icinga/Application/webrouter.php b/library/Icinga/Application/webrouter.php
index 5c8cbb6ea..5ce782889 100644
--- a/library/Icinga/Application/webrouter.php
+++ b/library/Icinga/Application/webrouter.php
@@ -61,7 +61,7 @@ if (in_array($path, $special)) {
             Stylesheet::send();
             exit;
         case 'css/icinga.min.css':
-            Stylesheet::sendMinified();
+            Stylesheet::send(true);
             exit;
 
         case 'js/icinga.dev.js':
diff --git a/library/Icinga/File/FileExtensionFilterIterator.php b/library/Icinga/File/FileExtensionFilterIterator.php
deleted file mode 100644
index 41efce0ad..000000000
--- a/library/Icinga/File/FileExtensionFilterIterator.php
+++ /dev/null
@@ -1,70 +0,0 @@
-<?php
-/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
-
-namespace Icinga\File;
-
-use FilterIterator;
-use Iterator;
-
-/**
- * Iterator over files having a specific file extension
- *
- * Usage example:
- * <code>
- * <?php
- *
- * namespace Icinga\Example;
- *
- * use RecursiveDirectoryIterator;
- * use RecursiveIteratorIterator;
- * use Icinga\File\FileExtensionFilterIterator;
- *
- * $markdownFiles = new FileExtensionFilterIterator(
- *     new RecursiveIteratorIterator(
- *         new RecursiveDirectoryIterator(__DIR__),
- *         RecursiveIteratorIterator::SELF_FIRST
- *     ),
- *     'md'
- * );
- * </code>
- */
-class FileExtensionFilterIterator extends FilterIterator
-{
-    /**
-     * The extension to filter for
-     *
-     * @var string
-     */
-    protected $extension;
-
-    /**
-     * Create a new FileExtensionFilterIterator
-     *
-     * @param Iterator  $iterator   Apply filter to this iterator
-     * @param string    $extension  The file extension to filter for. The file extension may not contain the leading dot
-     */
-    public function __construct(Iterator $iterator, $extension)
-    {
-        $this->extension = '.' . ltrim(strtolower((string) $extension), '.');
-        parent::__construct($iterator);
-    }
-
-    /**
-     * Accept files which match the file extension to filter for
-     *
-     * @return bool Whether the current element of the iterator is acceptable
-     *              through this filter
-     */
-    public function accept()
-    {
-        $current = $this->current();
-        /** @var $current \SplFileInfo */
-        if (! $current->isFile()) {
-            return false;
-        }
-        // SplFileInfo::getExtension() is only available since PHP 5 >= 5.3.6
-        $filename = $current->getFilename();
-        $sfx = substr($filename, -strlen($this->extension));
-        return $sfx === false ? false : strtolower($sfx) === $this->extension;
-    }
-}
diff --git a/library/Icinga/File/NonEmptyFileIterator.php b/library/Icinga/File/NonEmptyFileIterator.php
deleted file mode 100644
index 03756ccd2..000000000
--- a/library/Icinga/File/NonEmptyFileIterator.php
+++ /dev/null
@@ -1,48 +0,0 @@
-<?php
-/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
-
-namespace Icinga\File;
-
-use FilterIterator;
-
-/**
- * Iterator over non-empty files
- *
- * Usage example:
- * <code>
- * <?php
- *
- * namespace Icinga\Example;
- *
- * use RecursiveDirectoryIterator;
- * use RecursiveIteratorIterator;
- * use Icinga\File\NonEmptyFilterIterator;
- *
- * $nonEmptyFiles = new NonEmptyFileIterator(
- *     new RecursiveIteratorIterator(
- *         new RecursiveDirectoryIterator(__DIR__),
- *         RecursiveIteratorIterator::SELF_FIRST
- *     )
- * );
- * </code>
- */
-class NonEmptyFileIterator extends FilterIterator
-{
-    /**
-     * Accept non-empty files
-     *
-     * @return bool Whether the current element of the iterator is acceptable
-     *              through this filter
-     */
-    public function accept()
-    {
-        $current = $this->current();
-        /** @var $current \SplFileInfo */
-        if (! $current->isFile()
-            || $current->getSize() === 0
-        ) {
-            return false;
-        }
-        return true;
-    }
-}
diff --git a/library/Icinga/Util/DirectoryIterator.php b/library/Icinga/Util/DirectoryIterator.php
new file mode 100644
index 000000000..34bb937f2
--- /dev/null
+++ b/library/Icinga/Util/DirectoryIterator.php
@@ -0,0 +1,191 @@
+<?php
+/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
+
+namespace Icinga\Util;
+
+use InvalidArgumentException;
+use Iterator;
+
+/**
+ * Iterator for traversing a directory
+ */
+class DirectoryIterator implements Iterator
+{
+    /**
+     * Current directory item
+     *
+     * @var string|false
+     */
+    private $current;
+
+    /**
+     * The file extension to filter for
+     *
+     * @var string
+     */
+    protected $extension;
+
+    /**
+     * Directory handle
+     *
+     * @var resource
+     */
+    private $handle;
+
+    /**
+     * Current key
+     *
+     * @var string
+     */
+    private $key;
+
+    /**
+     * The path of the directory to traverse
+     *
+     * @var string
+     */
+    protected $path;
+
+    /**
+     * Whether to skip empty files
+     *
+     * Defaults to true.
+     *
+     * @var bool
+     */
+    protected $skipEmpty = true;
+
+    /**
+     * Whether to skip hidden files
+     *
+     * Defaults to true.
+     *
+     * @var bool
+     */
+    protected $skipHidden = true;
+
+    /**
+     * Create a new directory iterator from path
+     *
+     * The given path will not be validated whether it is readable. Use {@link isReadable()} before creating a new
+     * directory iterator instance.
+     *
+     * @param   string  $path       The path of the directory to traverse
+     * @param   string  $extension  The file extension to filter for. A leading dot is optional
+     */
+    public function __construct($path, $extension = null)
+    {
+        if (empty($path)) {
+            throw new InvalidArgumentException('The path can\'t be empty');
+        }
+        $this->path = $path;
+        if (! empty($extension)) {
+            $this->extension = '.' . ltrim($extension, '.');
+        }
+    }
+
+    /**
+     * Check whether the given path is a directory and is readable
+     *
+     * @param   string  $path   The path of the directory
+     *
+     * @return  bool
+     */
+    public static function isReadable($path)
+    {
+        return is_dir($path) && is_readable($path);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function current()
+    {
+        return $this->current;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function next()
+    {
+        do {
+            $file = readdir($this->handle);
+            if ($file === false) {
+                $key = false;
+                break;
+            } else {
+                $skip = false;
+                do {
+                    if ($this->skipHidden && $file[0] === '.') {
+                        $skip = true;
+                        break;
+                    }
+
+                    $path = $this->path . '/' . $file;
+
+                    if (is_dir($path)) {
+                        $skip = true;
+                        break;
+                    }
+
+                    if ($this->skipEmpty && ! filesize($path)) {
+                        $skip = true;
+                        break;
+                    }
+
+                    if ($this->extension && ! String::endsWith($file, $this->extension)) {
+                        $skip = true;
+                        break;
+                    }
+
+                    $key = $file;
+                    $file = $path;
+                } while (0);
+            }
+        } while ($skip);
+
+        $this->current = $file;
+        /** @noinspection PhpUndefinedVariableInspection */
+        $this->key = $key;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function key()
+    {
+        return $this->key;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function valid()
+    {
+        return $this->current !== false;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function rewind()
+    {
+        if ($this->handle === null) {
+            $this->handle = opendir($this->path);
+        } else {
+            rewinddir($this->handle);
+        }
+        $this->next();
+    }
+
+    /**
+     * Close directory handle if created
+     */
+    public function __destruct()
+    {
+        if ($this->handle !== null) {
+            closedir($this->handle);
+        }
+    }
+}
diff --git a/library/Icinga/Util/String.php b/library/Icinga/Util/String.php
index 3ab09bf1c..fabe9fbe9 100644
--- a/library/Icinga/Util/String.php
+++ b/library/Icinga/Util/String.php
@@ -101,17 +101,17 @@ class String
     }
 
     /**
-     * Check if a string ends with a different string
+     * Test whether the given string ends with the given suffix
      *
-     * @param $haystack string The string to search for matches
-     * @param $needle   string The string to match at the start of the haystack
+     * @param   string  $string The string to test
+     * @param   string  $suffix The suffix the string must end with
      *
-     * @return bool     Whether or not needle is at the beginning of haystack
+     * @return bool
      */
-    public static function endsWith($haystack, $needle)
+    public static function endsWith($string, $suffix)
     {
-        return $needle === '' ||
-             (($temp = strlen($haystack) - strlen($needle)) >= 0 && false !== strpos($haystack, $needle, $temp));
+        $stringSuffix = substr($string, -strlen($suffix));
+        return $stringSuffix !== false ? $stringSuffix === $suffix : false;
     }
 
     /**
diff --git a/library/Icinga/Web/Cookie.php b/library/Icinga/Web/Cookie.php
index 7010bb999..d772aa71e 100644
--- a/library/Icinga/Web/Cookie.php
+++ b/library/Icinga/Web/Cookie.php
@@ -3,77 +3,260 @@
 
 namespace Icinga\Web;
 
+use Icinga\Application\Config;
+use Icinga\Application\Icinga;
+use InvalidArgumentException;
+
 /**
- * Helper Class Cookie
+ * A HTTP cookie
  */
 class Cookie
 {
     /**
-     * The name of the control cookie
+     * Domain of the cookie
+     *
+     * @var string
      */
-    const CHECK_COOKIE = '_chc';
+    protected $domain;
 
     /**
-     * The request
+     * The timestamp at which the cookie expires
      *
-     * @var Request
+     * @var int
      */
-    protected $request;
+    protected $expire;
+
+    /**
+     * Whether to protect the cookie against client side script code attempts to read the cookie
+     *
+     * Defaults to true.
+     *
+     * @var bool
+     */
+    protected $httpOnly = true;
+
+    /**
+     * Name of the cookie
+     *
+     * @var string
+     */
+    protected $name;
+
+    /**
+     * The path on the web server where the cookie is available
+     *
+     * Defaults to the base URL.
+     *
+     * @var string
+     */
+    protected $path;
+
+    /**
+     * Whether to send the cookie only over a secure connection
+     *
+     * Defaults to auto-detection so that if the current request was sent over a secure connection the secure flag will
+     * be set to true.
+     *
+     * @var bool
+     */
+    protected $secure;
+
+    /**
+     * Value of the cookie
+     *
+     * @var string
+     */
+    protected $value;
 
     /**
      * Create a new cookie
      *
-     * @param Request $request
+     * @param   string  $name
+     * @param   string  $value
      */
-    public function __construct(Request $request)
+    public function __construct($name, $value = null)
     {
-        $this->request = $request;
+        if (preg_match("/[=,; \t\r\n\013\014]/", $name)) {
+            throw new InvalidArgumentException(sprintf(
+                'Cookie name can\'t contain these characters: =,; \t\r\n\013\014 (%s)',
+                $name
+            ));
+        }
+        if (empty($name)) {
+            throw new InvalidArgumentException('The cookie name can\'t be empty');
+        }
+        $this->name = $name;
+        $this->value = $value;
     }
 
     /**
-     * Check whether cookies are supported or not
+     * Get the domain of the cookie
+     *
+     * @return  string
+     */
+    public function getDomain()
+    {
+        return $this->domain;
+    }
+
+    /**
+     * Set the domain of the cookie
+     *
+     * @param   string  $domain
+     *
+     * @return  $this
+     */
+    public function setDomain($domain)
+    {
+        $this->domain = $domain;
+        return $this;
+    }
+
+    /**
+     * Get the timestamp at which the cookie expires
+     *
+     * @return  int
+     */
+    public function getExpire()
+    {
+        return $this->expire;
+    }
+
+    /**
+     * Set the timestamp at which the cookie expires
+     *
+     * @param   int $expire
+     *
+     * @return  $this
+     */
+    public function setExpire($expire)
+    {
+        $this->expire = $expire;
+        return $this;
+    }
+
+    /**
+     * Get whether to protect the cookie against client side script code attempts to read the cookie
+     *
+     * @return  bool
+     */
+    public function isHttpOnly()
+    {
+        return $this->httpOnly;
+    }
+
+    /**
+     * Set whether to protect the cookie against client side script code attempts to read the cookie
+     *
+     * @param   bool    $httpOnly
+     *
+     * @return  $this
+     */
+    public function setHttpOnly($httpOnly)
+    {
+        $this->httpOnly = $httpOnly;
+        return $this;
+    }
+
+    /**
+     * Get the name of the cookie
+     *
+     * @return string
+     */
+    public function getName()
+    {
+        return $this->name;
+    }
+
+    /**
+     * Get the path on the web server where the cookie is available
+     *
+     * If the path has not been set either via {@link setPath()} or via config, the base URL will be returned.
+     *
+     * @return  string
+     */
+    public function getPath()
+    {
+        if ($this->path === null) {
+            $path = Config::app()->get('cookie', 'path');
+            if ($path === null) {
+                // The following call could be used as default for ConfigObject::get(), but we prevent unnecessary
+                // function calls here, if the path is set in the config
+                $path = Icinga::app()->getRequest()->getBaseUrl();
+            }
+            return $path;
+        }
+        return $this->path;
+    }
+
+    /**
+     * Set the path on the web server where the cookie is available
+     *
+     * @param   string  $path
+     *
+     * @return  $this
+     */
+    public function setPath($path)
+    {
+        $this->path = $path;
+        return $this;
+    }
+
+    /**
+     * Get whether to send the cookie only over a secure connection
+     *
+     * If the secure flag has not been set either via {@link setSecure()} or via config and if the current request was
+     * sent over a secure connection, true will be returned.
      *
      * @return bool
      */
-    public function isSupported()
+    public function isSecure()
     {
-        if (! empty($_COOKIE)) {
-            $this->cleanupCheck();
-            return true;
+        if ($this->secure === null) {
+            $secure = Config::app()->get('cookie', 'secure');
+            if ($secure === null) {
+                // The following call could be used as default for ConfigObject::get(), but we prevent unnecessary
+                // function calls here, if the secure flag is set in the config
+                $secure = Icinga::app()->getRequest()->isSecure();
+            }
+            return $secure;
         }
-
-        $url = $this->request->getUrl();
-
-        if ($url->hasParam('_checkCookie') && empty($_COOKIE)) {
-            return false;
-        }
-
-        if (! $url->hasParam('_checkCookie')) {
-            $this->provideCheck();
-        }
-
-        return false;
+        return $this->secure;
     }
 
     /**
-     * Prepare check to detect cookie support
+     * Set whether to send the cookie only over a secure connection
+     *
+     * @param   bool    $secure
+     *
+     * @return  $this
      */
-    public function provideCheck()
+    public function setSecure($secure)
     {
-        setcookie(self::CHECK_COOKIE, '1');
-
-        $requestUri = $this->request->getUrl()->addParams(array('_checkCookie' => 1));
-        $this->request->getResponse()->redirectAndExit($requestUri);
+        $this->secure = $secure;
+        return $this;
     }
 
     /**
-     * Cleanup the cookie support check
+     * Get the value of the cookie
+     *
+     * @return  string
      */
-    public function cleanupCheck()
+    public function getValue()
     {
-        if ($this->request->getUrl()->hasParam('_checkCookie') && isset($_COOKIE[self::CHECK_COOKIE])) {
-            $requestUri =$this->request->getUrl()->without('_checkCookie');
-            $this->request->getResponse()->redirectAndExit($requestUri);
-        }
+        return $this->value;
+    }
+
+    /**
+     * Set the value of the cookie
+     *
+     * @param   string  $value
+     *
+     * @return  $this
+     */
+    public function setValue($value)
+    {
+        $this->value = $value;
+        return $this;
     }
 }
diff --git a/library/Icinga/Web/CookieSet.php b/library/Icinga/Web/CookieSet.php
new file mode 100644
index 000000000..31906bcb4
--- /dev/null
+++ b/library/Icinga/Web/CookieSet.php
@@ -0,0 +1,57 @@
+<?php
+/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
+
+namespace Icinga\Web;
+
+use ArrayIterator;
+use IteratorAggregate;
+
+/**
+ * Maintain a set of cookies
+ */
+class CookieSet implements IteratorAggregate
+{
+    /**
+     * Cookies in this set indexed by the cookie names
+     *
+     * @var Cookie[]
+     */
+    protected $cookies = array();
+
+    /**
+     * Get an iterator for traversing the cookies in this set
+     *
+     * @return  ArrayIterator   An iterator for traversing the cookies in this set
+     */
+    public function getIterator()
+    {
+        return new ArrayIterator($this->cookies);
+    }
+
+    /**
+     * Add a cookie to the set
+     *
+     * If a cookie with the same name already exists, the cookie will be overridden.
+     *
+     * @param   Cookie  $cookie The cookie to add
+     *
+     * @return  $this
+     */
+    public function add(Cookie $cookie)
+    {
+        $this->cookies[$cookie->getName()] = $cookie;
+        return $this;
+    }
+
+    /**
+     * Get the cookie with the given name from the set
+     *
+     * @param   string  $name       The name of the cookie
+     *
+     * @return  Cookie|null         The cookie with the given name or null if the cookie does not exist
+     */
+    public function get($name)
+    {
+        return isset($this->cookies[$name]) ? $this->cookies[$name] : null;
+    }
+}
diff --git a/library/Icinga/Web/FileCache.php b/library/Icinga/Web/FileCache.php
index 96f3775d0..c9ec8b938 100644
--- a/library/Icinga/Web/FileCache.php
+++ b/library/Icinga/Web/FileCache.php
@@ -190,9 +190,6 @@ class FileCache
     /**
      * Whether the given ETag matchesspecific file(s) on disk
      *
-     * If no ETag is given we'll try to fetch the one from the current
-     * HTTP request. Respects HTTP Cache-Control: no-cache, if set.
-     *
      * @param string|array $files file(s) to check
      * @param string       $match ETag to match against
      *
@@ -208,9 +205,6 @@ class FileCache
         if (! $match) {
             return false;
         }
-        if (isset($_SERVER['HTTP_CACHE_CONTROL']) &&  $_SERVER['HTTP_CACHE_CONTROL'] === 'no-cache') {
-            return false;
-        }
 
         $etag = self::etagForFiles($files);
         return $match === $etag ? $etag : false;
diff --git a/library/Icinga/Web/Helper/CookieHelper.php b/library/Icinga/Web/Helper/CookieHelper.php
new file mode 100644
index 000000000..ba1804932
--- /dev/null
+++ b/library/Icinga/Web/Helper/CookieHelper.php
@@ -0,0 +1,81 @@
+<?php
+/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
+
+namespace Icinga\Web\Helper;
+
+use Icinga\Web\Request;
+
+/**
+ * Helper Class Cookie
+ */
+class CookieHelper
+{
+    /**
+     * The name of the control cookie
+     */
+    const CHECK_COOKIE = '_chc';
+
+    /**
+     * The request
+     *
+     * @var Request
+     */
+    protected $request;
+
+    /**
+     * Create a new cookie
+     *
+     * @param Request $request
+     */
+    public function __construct(Request $request)
+    {
+        $this->request = $request;
+    }
+
+    /**
+     * Check whether cookies are supported or not
+     *
+     * @return bool
+     */
+    public function isSupported()
+    {
+        if (! empty($_COOKIE)) {
+            $this->cleanupCheck();
+            return true;
+        }
+
+        $url = $this->request->getUrl();
+
+        if ($url->hasParam('_checkCookie') && empty($_COOKIE)) {
+            return false;
+        }
+
+        if (! $url->hasParam('_checkCookie')) {
+            $this->provideCheck();
+        }
+
+        return false;
+    }
+
+    /**
+     * Prepare check to detect cookie support
+     */
+    public function provideCheck()
+    {
+        setcookie(self::CHECK_COOKIE, '1');
+
+        $requestUri = $this->request->getUrl()->addParams(array('_checkCookie' => 1));
+        $this->request->getResponse()->redirectAndExit($requestUri);
+    }
+
+    /**
+     * Cleanup the cookie support check
+     */
+    public function cleanupCheck()
+    {
+        if ($this->request->getUrl()->hasParam('_checkCookie') && isset($_COOKIE[self::CHECK_COOKIE])) {
+            $requestUri =$this->request->getUrl()->without('_checkCookie');
+            $this->request->getResponse()->redirectAndExit($requestUri);
+        }
+    }
+}
diff --git a/library/Icinga/Web/JavaScript.php b/library/Icinga/Web/JavaScript.php
index c5fccbf93..241c6aa44 100644
--- a/library/Icinga/Web/JavaScript.php
+++ b/library/Icinga/Web/JavaScript.php
@@ -47,15 +47,22 @@ class JavaScript
 
     public static function sendMinified()
     {
-        return self::send(true);
+        self::send(true);
     }
 
     public static function sendForIe8()
     {
         self::$vendorFiles = self::$ie8VendorFiles;
-        return self::send();
+        self::send();
     }
 
+    /**
+     * Send the client side script code to the client
+     *
+     * Does not cache the client side script code if the HTTP header Cache-Control or Pragma is set to no-cache.
+     *
+     * @param   bool    $minified   Whether to compress the client side script code
+     */
     public static function send($minified = false)
     {
         header('Content-Type: application/javascript');
@@ -87,7 +94,10 @@ class JavaScript
         }
         $files = array_merge($vendorFiles, $jsFiles);
 
-        if ($etag = FileCache::etagMatchesFiles($files)) {
+        $request = Icinga::app()->getRequest();
+        $noCache = $request->getHeader('Cache-Control') === 'no-cache' || $request->getHeader('Pragma') === 'no-cache';
+
+        if (! $noCache && FileCache::etagMatchesFiles($files)) {
             header("HTTP/1.1 304 Not Modified");
             return;
         } else {
@@ -99,7 +109,7 @@ class JavaScript
 
         $cacheFile = 'icinga-' . $etag . $min . '.js';
         $cache = FileCache::instance();
-        if ($cache->has($cacheFile)) {
+        if (! $noCache && $cache->has($cacheFile)) {
             $cache->send($cacheFile);
             return;
         }
diff --git a/library/Icinga/Web/LessCompiler.php b/library/Icinga/Web/LessCompiler.php
index eae3f565c..e5f8dddfa 100644
--- a/library/Icinga/Web/LessCompiler.php
+++ b/library/Icinga/Web/LessCompiler.php
@@ -3,167 +3,170 @@
 
 namespace Icinga\Web;
 
-use Exception;
-use RecursiveDirectoryIterator;
+use Icinga\Application\Logger;
+use RecursiveArrayIterator;
 use RecursiveIteratorIterator;
-use RegexIterator;
-use RecursiveRegexIterator;
-use Icinga\Application\Icinga;
 use lessc;
 
 /**
- * Less compiler prints files or directories to stdout
+ * Compile LESS into CSS
+ *
+ * Comments will be removed always. lessc is messing them up.
  */
 class LessCompiler
 {
-    /**
-     * Collection of items: File or directories
-     *
-     * @var array
-     */
-    private $items = array();
-
     /**
      * lessphp compiler
      *
-     * @var \lessc
+     * @var lessc
      */
-    private $lessc;
-
-    private $source;
+    protected $lessc;
 
     /**
-     * Create a new instance
+     * Array of LESS files
+     *
+     * @var string[]
+     */
+    protected $lessFiles = array();
+
+    /**
+     * Array of module LESS files indexed by module names
+     *
+     * @var array[]
+     */
+    protected $moduleLessFiles = array();
+
+    /**
+     * LESS source
+     *
+     * @var string
+     */
+    protected $source;
+
+    /**
+     * Path of the LESS theme
+     *
+     * @var string
+     */
+    protected $theme;
+
+    /**
+     * Create a new LESS compiler
      */
     public function __construct()
     {
         require_once 'lessphp/lessc.inc.php';
         $this->lessc = new lessc();
+        // Discourage usage of import because we're caching based on an explicit list of LESS files to compile
+        $this->lessc->importDisabled = true;
     }
 
     /**
-     * Disable the extendend import functionality
+     * Add a Web 2 LESS file
+     *
+     * @param   string  $lessFile   Path to the LESS file
      *
      * @return  $this
      */
-    public function disableExtendedImport()
+    public function addLessFile($lessFile)
     {
-        $this->lessc->importDisabled = true;
+        $this->lessFiles[] = $lessFile;
         return $this;
     }
 
+    /**
+     * Add a module LESS file
+     *
+     * @param   string  $moduleName Name of the module
+     * @param   string  $lessFile   Path to the LESS file
+     *
+     * @return  $this
+     */
+    public function addModuleLessFile($moduleName, $lessFile)
+    {
+        if (! isset($this->moduleLessFiles[$moduleName])) {
+            $this->moduleLessFiles[$moduleName] = array();
+        }
+        $this->moduleLessFiles[$moduleName][] = $lessFile;
+        return $this;
+    }
+
+    /**
+     * Get the list of LESS files added to the compiler
+     *
+     * @return string[]
+     */
+    public function getLessFiles()
+    {
+        $lessFiles = iterator_to_array(new RecursiveIteratorIterator(new RecursiveArrayIterator(
+                $this->lessFiles + $this->moduleLessFiles
+        )));
+        if ($this->theme !== null) {
+            $lessFiles[] = $this->theme;
+        }
+        return $lessFiles;
+    }
+
+    /**
+     * Set the path to the LESS theme
+     *
+     * @param   string  $theme  Path to the LESS theme
+     *
+     * @return  $this
+     */
+    public function setTheme($theme)
+    {
+        if (is_file($theme) && is_readable($theme)) {
+            $this->theme = $theme;
+        } else {
+            Logger::error('Can\t load theme %s. Make sure that the theme exists and is readable', $theme);
+        }
+        return $this;
+    }
+
+    /**
+     * Instruct the compiler to minify CSS
+     *
+     * @return  $this
+     */
     public function compress()
     {
-        $this->lessc->setPreserveComments(false);
         $this->lessc->setFormatter('compressed');
         return $this;
     }
 
     /**
-     * Add usable style item to stack
+     * Render to CSS
      *
-     * @param string $item File or directory
+     * @return  string
      */
-    public function addItem($item)
+    public function render()
     {
-        $this->items[] = $item;
-    }
-
-    public function addLoadedModules()
-    {
-        foreach (Icinga::app()->getModuleManager()->getLoadedModules() as $name => $module) {
-            $this->addModule($name, $module);
+        foreach ($this->lessFiles as $lessFile) {
+            $this->source .= file_get_contents($lessFile);
         }
-        return $this;
-    }
 
-    public function addFile($filename)
-    {
-        $this->source .= "\n/* CSS: $filename */\n"
-            . file_get_contents($filename)
-            . "\n\n";
-        return $this;
-    }
+        $moduleCss = '';
+        foreach ($this->moduleLessFiles as $moduleName => $moduleLessFiles) {
+            $moduleCss .= '.icinga-module.module-' . $moduleName . ' {';
+            foreach ($moduleLessFiles as $moduleLessFile) {
+                $moduleCss .= file_get_contents($moduleLessFile);
+            }
+            $moduleCss .= '}';
+        }
+
+        $moduleCss = preg_replace(
+            '/(\.icinga-module\.module-[^\s]+) (#layout\.[^\s]+)/m',
+            '\2 \1',
+            $moduleCss
+        );
+
+        $this->source .= $moduleCss;
+
+        if ($this->theme !== null) {
+            $this->source .= file_get_contents($this->theme);
+        }
 
-    public function compile()
-    {
         return $this->lessc->compile($this->source);
     }
-
-    public function addModule($name, $module)
-    {
-        if ($module->hasCss()) {
-            $contents = array();
-            foreach ($module->getCssFiles() as $path) {
-                if (file_exists($path)) {
-                    $contents[] = "/* CSS: modules/$name/$path */\n" . file_get_contents($path);
-                }
-            }
-
-            $this->source .= ''
-                . '.icinga-module.module-'
-                . $name
-                . " {\n"
-                . join("\n\n", $contents)
-                . "}\n\n";
-        }
-
-        return $this;
-    }
-
-    /**
-     * Compile and print a single file
-     *
-     * @param string $file
-     */
-    public function printFile($file)
-    {
-        $ext = pathinfo($file, PATHINFO_EXTENSION);
-        echo PHP_EOL. '/* CSS: ' . $file . ' */' . PHP_EOL;
-
-        if ($ext === 'css') {
-            readfile($file);
-        } elseif ($ext === 'less') {
-            try {
-                echo $this->lessc->compileFile($file);
-            } catch (Exception $e) {
-                echo '/* ' . PHP_EOL . ' ===' . PHP_EOL;
-                echo '  Error in file ' . $file . PHP_EOL;
-                echo '  ' . $e->getMessage() . PHP_EOL . PHP_EOL;
-                echo '  ' . 'This file was dropped cause of errors.' . PHP_EOL;
-                echo ' ===' . PHP_EOL . '*/' . PHP_EOL;
-            }
-        }
-
-        echo PHP_EOL;
-    }
-
-    /**
-     * Compile and print a path content (recursive)
-     *
-     * @param string $path
-     */
-    public function printPathRecursive($path)
-    {
-        $directoryInterator = new RecursiveDirectoryIterator($path);
-        $iterator = new RecursiveIteratorIterator($directoryInterator);
-        $filteredIterator = new RegexIterator($iterator, '/\.(css|less)$/', RecursiveRegexIterator::GET_MATCH);
-        foreach ($filteredIterator as $file => $extension) {
-            $this->printFile($file);
-        }
-    }
-
-    /**
-     * Compile and print the whole item stack
-     */
-    public function printStack()
-    {
-        foreach ($this->items as $item) {
-            if (is_dir($item)) {
-                $this->printPathRecursive($item);
-            } elseif (is_file($item)) {
-                $this->printFile($item);
-            }
-        }
-    }
 }
diff --git a/library/Icinga/Web/Request.php b/library/Icinga/Web/Request.php
index 9ad44e327..8171aecc4 100644
--- a/library/Icinga/Web/Request.php
+++ b/library/Icinga/Web/Request.php
@@ -118,15 +118,4 @@ class Request extends Zend_Controller_Request_Http
         }
         return $id . '-' . $this->uniqueId;
     }
-
-    /**
-     * Detect whether cookies are enabled
-     *
-     * @return bool
-     */
-    public function hasCookieSupport()
-    {
-        $cookie = new Cookie($this);
-        return $cookie->isSupported();
-    }
 }
diff --git a/library/Icinga/Web/Response.php b/library/Icinga/Web/Response.php
index ae37c0929..eca389daa 100644
--- a/library/Icinga/Web/Response.php
+++ b/library/Icinga/Web/Response.php
@@ -7,8 +7,18 @@ use Zend_Controller_Response_Http;
 use Icinga\Application\Icinga;
 use Icinga\Web\Response\JsonResponse;
 
+/**
+ * A HTTP response
+ */
 class Response extends Zend_Controller_Response_Http
 {
+    /**
+     * Set of cookies which are to be sent to the client
+     *
+     * @var CookieSet
+     */
+    protected $cookies;
+
     /**
      * Redirect URL
      *
@@ -23,6 +33,13 @@ class Response extends Zend_Controller_Response_Http
      */
     protected $request;
 
+    /**
+     * Whether to instruct client side script code to reload CSS
+     *
+     * @var bool
+     */
+    protected $reloadCss;
+
     /**
      * Whether to send the rerender layout header on XHR
      *
@@ -30,6 +47,44 @@ class Response extends Zend_Controller_Response_Http
      */
     protected $rerenderLayout = false;
 
+    /**
+     * Get the set of cookies which are to be sent to the client
+     *
+     * @return  CookieSet
+     */
+    public function getCookies()
+    {
+        if ($this->cookies === null) {
+            $this->cookies = new CookieSet();
+        }
+        return $this->cookies;
+    }
+
+    /**
+     * Get the cookie with the given name from the set of cookies which are to be sent to the client
+     *
+     * @param   string  $name       The name of the cookie
+     *
+     * @return  Cookie|null         The cookie with the given name or null if the cookie does not exist
+     */
+    public function getCookie($name)
+    {
+        return $this->getCookies()->get($name);
+    }
+
+    /**
+     * Set the given cookie for sending it to the client
+     *
+     * @param   Cookie  $cookie The cookie to send to the client
+     *
+     * @return  $this
+     */
+    public function setCookie(Cookie $cookie)
+    {
+        $this->getCookies()->add($cookie);
+        return $this;
+    }
+
     /**
      * Get the redirect URL
      *
@@ -74,6 +129,29 @@ class Response extends Zend_Controller_Response_Http
         return $this->request;
     }
 
+    /**
+     * Get whether to instruct client side script code to reload CSS
+     *
+     * @return bool
+     */
+    public function isReloadCss()
+    {
+        return $this->reloadCss;
+    }
+
+    /**
+     * Set whether to instruct client side script code to reload CSS
+     *
+     * @param   bool    $reloadCss
+     *
+     * @return  $this
+     */
+    public function setReloadCss($reloadCss)
+    {
+        $this->reloadCss = $reloadCss;
+        return $this;
+    }
+
     /**
      * Get whether to send the rerender layout header on XHR
      *
@@ -123,6 +201,9 @@ class Response extends Zend_Controller_Response_Http
             if ($this->getRerenderLayout()) {
                 $this->setHeader('X-Icinga-Container', 'layout', true);
             }
+            if ($this->isReloadCss()) {
+                $this->setHeader('X-Icinga-Reload-Css', 'now', true);
+            }
         } else {
             if ($redirectUrl !== null) {
                 $this->setRedirect($redirectUrl->getAbsoluteUrl());
@@ -148,12 +229,34 @@ class Response extends Zend_Controller_Response_Http
         exit;
     }
 
+    /**
+     * Send the cookies to the client
+     */
+    public function sendCookies()
+    {
+        foreach ($this->getCookies() as $cookie) {
+            /** @var Cookie $cookie */
+            setcookie(
+                $cookie->getName(),
+                $cookie->getValue(),
+                $cookie->getExpire(),
+                $cookie->getPath(),
+                $cookie->getDomain(),
+                $cookie->isSecure(),
+                $cookie->isHttpOnly()
+            );
+        }
+    }
+
     /**
      * {@inheritdoc}
      */
     public function sendHeaders()
     {
         $this->prepare();
+        if (! $this->getRequest()->isApiRequest()) {
+            $this->sendCookies();
+        }
         return parent::sendHeaders();
     }
 }
diff --git a/library/Icinga/Web/StyleSheet.php b/library/Icinga/Web/StyleSheet.php
index 5ce438e74..f3092fd6f 100644
--- a/library/Icinga/Web/StyleSheet.php
+++ b/library/Icinga/Web/StyleSheet.php
@@ -3,12 +3,28 @@
 
 namespace Icinga\Web;
 
+use Exception;
 use Icinga\Application\Icinga;
-use Icinga\Web\FileCache;
-use Icinga\Web\LessCompiler;
+use Icinga\Application\Logger;
+use Icinga\Exception\IcingaException;
 
+/**
+ * Send CSS for Web 2 and all loaded modules to the client
+ */
 class StyleSheet
 {
+    /**
+     * The name of the default theme
+     *
+     * @var string
+     */
+    const DEFAULT_THEME = 'Icinga';
+
+    /**
+     * Array of core LESS files Web 2 sends to the client
+     *
+     * @var string[]
+     */
     protected static $lessFiles = array(
         '../application/fonts/fontello-ifont/css/ifont-embedded.css',
         'css/vendor/normalize.css',
@@ -21,11 +37,9 @@ class StyleSheet
         'css/icinga/nav.less',
         'css/icinga/main.less',
         'css/icinga/animation.less',
-        'css/icinga/layout-colors.less',
+        'css/icinga/layout.less',
         'css/icinga/layout-structure.less',
         'css/icinga/menu.less',
-        'css/icinga/header-elements.less',
-        'css/icinga/footer-elements.less',
 //        'css/icinga/main-content.less',
         'css/icinga/tabs.less',
         'css/icinga/forms.less',
@@ -37,92 +51,180 @@ class StyleSheet
         'css/icinga/dev.less',
 //        'css/icinga/logo.less',
         'css/icinga/spinner.less',
-        'css/icinga/compat.less'
+        'css/icinga/compat.less',
+        'css/icinga/print.less'
     );
 
-    public static function compileForPdf()
-    {
-        self::checkPhp();
-        $less = new LessCompiler();
-        $basedir = Icinga::app()->getBootstrapDirectory();
-        foreach (self::$lessFiles as $file) {
-            $less->addFile($basedir . '/' . $file);
-        }
-        $less->addLoadedModules();
-        $less->addFile($basedir . '/css/pdf/pdfprint.less');
-        return $less->compile();
-    }
+    /**
+     * Application instance
+     *
+     * @var \Icinga\Application\EmbeddedWeb
+     */
+    protected $app;
 
-    public static function sendMinified()
-    {
-        self::send(true);
-    }
+    /**
+     * Less compiler
+     *
+     * @var LessCompiler
+     */
+    protected $lessCompiler;
 
-    protected static function fixModuleLayoutCss($css)
-    {
-        return preg_replace(
-            '/(\.icinga-module\.module-[^\s]+) (#layout\.[^\s]+)/m',
-            '\2 \1',
-            $css
-        );
-    }
+    /**
+     * Path to the public directory
+     *
+     * @var string
+     */
+    protected $pubPath;
 
-    protected static function checkPhp()
+    /**
+     * Create the StyleSheet
+     */
+    public function __construct()
     {
         // PHP had a rather conservative PCRE backtrack limit unless 5.3.7
         if (version_compare(PHP_VERSION, '5.3.7') <= 0) {
             ini_set('pcre.backtrack_limit', 1000000);
         }
+        $app = Icinga::app();
+        $this->app = $app;
+        $this->lessCompiler = new LessCompiler();
+        $this->pubPath = $app->getBootstrapDirectory();
+        $this->collect();
     }
 
-    public static function send($minified = false)
+    /**
+     * Collect Web 2 and module LESS files and add them to the LESS compiler
+     */
+    protected function collect()
     {
-        self::checkPhp();
-        $app = Icinga::app();
-        $basedir = $app->getBootstrapDirectory();
-        foreach (self::$lessFiles as $file) {
-            $lessFiles[] = $basedir . '/' . $file;
+        foreach (self::$lessFiles as $lessFile) {
+            $this->lessCompiler->addLessFile($this->pubPath . '/' . $lessFile);
         }
-        $files = $lessFiles;
-        foreach ($app->getModuleManager()->getLoadedModules() as $name => $module) {
+
+        $mm = $this->app->getModuleManager();
+
+        foreach ($mm->getLoadedModules() as $moduleName => $module) {
             if ($module->hasCss()) {
-                foreach ($module->getCssFiles() as $path) {
-                    if (file_exists($path)) {
-                        $files[] = $path;
-                    }
+                foreach ($module->getCssFiles() as $lessFilePath) {
+                    $this->lessCompiler->addModuleLessFile($moduleName, $lessFilePath);
                 }
             }
         }
 
-        if ($etag = FileCache::etagMatchesFiles($files)) {
-            header("HTTP/1.1 304 Not Modified");
-            return;
+        $themingConfig = $this->app->getConfig()->getSection('themes');
+        $defaultTheme = $themingConfig->get('default', self::DEFAULT_THEME);
+        $theme = null;
+
+        if ((bool) $themingConfig->get('disabled', false)) {
+            if ($defaultTheme !== self::DEFAULT_THEME) {
+                $theme = $defaultTheme;
+            }
         } else {
-            $etag = FileCache::etagForFiles($files);
+            if (($userTheme = $this->app->getRequest()->getCookie('theme', $defaultTheme))
+                && $userTheme !== $defaultTheme
+            ) {
+                $theme = $userTheme;
+            }
         }
-        header('Cache-Control: public');
-        header('ETag: "' . $etag . '"');
-        header('Content-Type: text/css');
 
-        $min = $minified ? '.min' : '';
-        $cacheFile = 'icinga-' . $etag . $min . '.css';
-        $cache = FileCache::instance();
-        if ($cache->has($cacheFile)) {
-            $cache->send($cacheFile);
+        if ($theme) {
+            if (($pos = strpos($theme, '/')) !== false) {
+                $moduleName = substr($theme, 0, $pos);
+                $theme = substr($theme, $pos + 1);
+                if ($mm->hasLoaded($moduleName)) {
+                    $module = $mm->getModule($moduleName);
+                    $this->lessCompiler->setTheme($module->getCssDir() . '/themes/' . $theme . '.less');
+                }
+            } else {
+                $this->lessCompiler->setTheme($this->pubPath . '/css/themes/' . $theme . '.less');
+            }
+        }
+    }
+
+    /**
+     * Get the stylesheet for PDF export
+     *
+     * @return  $this
+     */
+    public static function forPdf()
+    {
+        $styleSheet = new self();
+        $styleSheet->lessCompiler->addLessFile($styleSheet->pubPath . '/css/pdf/pdfprint.less');
+        // TODO(el): Caching
+        return $styleSheet;
+    }
+
+    /**
+     * Render the stylesheet
+     *
+     * @param   bool    $minified   Whether to compress the stylesheet
+     *
+     * @return  string              CSS
+     */
+    public function render($minified = false)
+    {
+        if ($minified) {
+            $this->lessCompiler->compress();
+        }
+        return $this->lessCompiler->render();
+    }
+
+    /**
+     * Send the stylesheet to the client
+     *
+     * Does not cache the stylesheet if the HTTP header Cache-Control or Pragma is set to no-cache.
+     *
+     * @param   bool    $minified   Whether to compress the stylesheet
+     */
+    public static function send($minified = false)
+    {
+        $styleSheet = new self();
+
+        $request = $styleSheet->app->getRequest();
+        $response = $styleSheet->app->getResponse();
+
+        $noCache = $request->getHeader('Cache-Control') === 'no-cache' || $request->getHeader('Pragma') === 'no-cache';
+
+        if (! $noCache && FileCache::etagMatchesFiles($styleSheet->lessCompiler->getLessFiles())) {
+            $response
+                ->setHttpResponseCode(304)
+                ->sendHeaders();
             return;
         }
 
-        $less = new LessCompiler();
-        $less->disableExtendedImport();
-        foreach ($lessFiles as $file) {
-            $less->addFile($file);
+        $etag = FileCache::etagForFiles($styleSheet->lessCompiler->getLessFiles());
+
+        $response
+            ->setHeader('Cache-Control', 'public', true)
+            ->setHeader('ETag', $etag, true)
+            ->setHeader('Content-Type', 'text/css', true);
+
+        $cacheFile = 'icinga-' . $etag . ($minified ? '.min' : '') . '.css';
+        $cache = FileCache::instance();
+
+        if (! $noCache && $cache->has($cacheFile)) {
+            $response->setBody($cache->get($cacheFile));
+        } else {
+            $css = $styleSheet->render($minified);
+            $response->setBody($css);
+            $cache->store($cacheFile, $css);
         }
-        $less->addLoadedModules();
-        if ($minified) {
-            $less->compress();
+
+        $response->sendResponse();
+    }
+
+    /**
+     * Render the stylesheet
+     *
+     * @return  string
+     */
+    public function __toString()
+    {
+        try {
+            return $this->render();
+        } catch (Exception $e) {
+            Logger::error($e);
+            return IcingaException::describe($e);
         }
-        $out = self::fixModuleLayoutCss($less->compile());
-        $cache->store($cacheFile, $out);
-        echo $out;
     }
 }
diff --git a/library/Icinga/Web/Widget/FilterEditor.php b/library/Icinga/Web/Widget/FilterEditor.php
index 115fb1790..26cea5930 100644
--- a/library/Icinga/Web/Widget/FilterEditor.php
+++ b/library/Icinga/Web/Widget/FilterEditor.php
@@ -703,7 +703,7 @@ class FilterEditor extends AbstractWidget
 
     public function renderSearch()
     {
-        $html = ' <form method="post" class="search inline dontprint" action="'
+        $html = ' <form method="post" class="search inline" action="'
               . $this->preservedUrl()
               . '"><input type="text" name="q" style="width: 8em" class="search" value="" placeholder="'
               . t('Search...')
diff --git a/modules/doc/library/Doc/DocIterator.php b/modules/doc/library/Doc/DocIterator.php
deleted file mode 100644
index 430d25445..000000000
--- a/modules/doc/library/Doc/DocIterator.php
+++ /dev/null
@@ -1,63 +0,0 @@
-<?php
-/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
-
-namespace Icinga\Module\Doc;
-
-use ArrayIterator;
-use Countable;
-use IteratorAggregate;
-use RecursiveDirectoryIterator;
-use RecursiveIteratorIterator;
-use Icinga\File\NonEmptyFileIterator;
-use Icinga\File\FileExtensionFilterIterator;
-
-/**
- * Iterator over non-empty Markdown files ordered by the case insensitive "natural order" of file names
- */
-class DocIterator implements Countable, IteratorAggregate
-{
-    /**
-     * Ordered files
-     *
-     * @var array
-     */
-    protected $fileInfo;
-
-    /**
-     * Create a new DocIterator
-     *
-     * @param string $path Path to the documentation
-     */
-    public function __construct($path)
-    {
-        $it = new FileExtensionFilterIterator(
-            new NonEmptyFileIterator(
-                new RecursiveIteratorIterator(
-                    new RecursiveDirectoryIterator($path),
-                    RecursiveIteratorIterator::SELF_FIRST
-                )
-            ),
-            'md'
-        );
-        // Unfortunately we have no chance to sort the iterator
-        $fileInfo = iterator_to_array($it);
-        natcasesort($fileInfo);
-        $this->fileInfo = $fileInfo;
-    }
-
-    /**
-     * {@inheritdoc}
-     */
-    public function count()
-    {
-        return count($this->fileInfo);
-    }
-
-    /**
-     * {@inheritdoc}
-     */
-    public function getIterator()
-    {
-        return new ArrayIterator($this->fileInfo);
-    }
-}
diff --git a/modules/doc/library/Doc/DocParser.php b/modules/doc/library/Doc/DocParser.php
index bffe86db0..87d09733c 100644
--- a/modules/doc/library/Doc/DocParser.php
+++ b/modules/doc/library/Doc/DocParser.php
@@ -4,11 +4,11 @@
 namespace Icinga\Module\Doc;
 
 use CachingIterator;
-use LogicException;
+use SplFileObject;
 use SplStack;
 use Icinga\Data\Tree\SimpleTree;
 use Icinga\Exception\NotReadableError;
-use Icinga\Module\Doc\Exception\DocEmptyException;
+use Icinga\Util\DirectoryIterator;
 use Icinga\Module\Doc\Exception\DocException;
 
 /**
@@ -40,7 +40,7 @@ class DocParser
     /**
      * Iterator over documentation files
      *
-     * @var DocIterator
+     * @var DirectoryIterator
      */
     protected $docIterator;
 
@@ -51,34 +51,17 @@ class DocParser
      *
      * @throws  DocException        If the documentation directory does not exist
      * @throws  NotReadableError    If the documentation directory is not readable
-     * @throws  DocEmptyException   If the documentation directory is empty
      */
     public function __construct($path)
     {
-        if (! is_dir($path)) {
+        if (! DirectoryIterator::isReadable($path)) {
             throw new DocException(
-                sprintf(mt('doc', 'Documentation directory \'%s\' does not exist'), $path)
-            );
-        }
-        if (! is_readable($path)) {
-            throw new DocException(
-                sprintf(mt('doc', 'Documentation directory \'%s\' is not readable'), $path)
-            );
-        }
-        $docIterator = new DocIterator($path);
-        if ($docIterator->count() === 0) {
-            throw new DocEmptyException(
-                sprintf(
-                    mt(
-                        'doc',
-                        'Documentation directory \'%s\' does not contain any non-empty Markdown file (\'.md\' suffix)'
-                    ),
-                    $path
-                )
+                mt('doc', 'Documentation directory \'%s\' is not readable'),
+                $path
             );
         }
         $this->path = $path;
-        $this->docIterator = $docIterator;
+        $this->docIterator = new DirectoryIterator($path, 'md');
     }
 
     /**
@@ -145,9 +128,8 @@ class DocParser
     public function getDocTree()
     {
         $tree = new SimpleTree();
-        foreach ($this->docIterator as $fileInfo) {
-            /** @var $fileInfo \SplFileInfo */
-            $file = $fileInfo->openFile();
+        foreach ($this->docIterator as $filename) {
+            $file = new SplFileObject($filename);
             $lastLine = null;
             $stack = new SplStack();
             $cachingIterator = new CachingIterator($file, CachingIterator::TOSTRING_USE_CURRENT);
diff --git a/modules/doc/library/Doc/Exception/DocEmptyException.php b/modules/doc/library/Doc/Exception/DocEmptyException.php
deleted file mode 100644
index 0ce563cf1..000000000
--- a/modules/doc/library/Doc/Exception/DocEmptyException.php
+++ /dev/null
@@ -1,11 +0,0 @@
-<?php
-/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
-
-namespace Icinga\Module\Doc\Exception;
-
-/**
- * Exception thrown if a documentation directory is empty
- */
-class DocEmptyException extends DocException
-{
-}
diff --git a/modules/doc/library/Doc/Renderer/DocTocRenderer.php b/modules/doc/library/Doc/Renderer/DocTocRenderer.php
index 20b8a5c64..ed67746ff 100644
--- a/modules/doc/library/Doc/Renderer/DocTocRenderer.php
+++ b/modules/doc/library/Doc/Renderer/DocTocRenderer.php
@@ -70,6 +70,9 @@ class DocTocRenderer extends DocRenderer
      */
     public function render()
     {
+        if (empty($this->content)) {
+            return '<p>' . mt('doc', 'Documentation is empty.') . '</p>';
+        }
         $view = $this->getView();
         $zendUrlHelper = $view->getHelper('Url');
         foreach ($this as $section) {
diff --git a/modules/monitoring/application/forms/Config/TransportConfigForm.php b/modules/monitoring/application/forms/Config/TransportConfigForm.php
index f21fdd73d..ae4b6e9a7 100644
--- a/modules/monitoring/application/forms/Config/TransportConfigForm.php
+++ b/modules/monitoring/application/forms/Config/TransportConfigForm.php
@@ -258,19 +258,4 @@ class TransportConfigForm extends ConfigForm
             $this->populate($data);
         }
     }
-
-    /**
-     * Retrieve all form element values
-     *
-     * @param   bool    $suppressArrayNotation  Ignored
-     *
-     * @return  array
-     */
-    public function getValues($suppressArrayNotation = false)
-    {
-        $values = parent::getValues();
-        $values = array_merge($values, $values['transport_form']);
-        unset($values['transport_form']);
-        return $values;
-    }
 }
diff --git a/modules/monitoring/application/views/scripts/alertsummary/index.phtml b/modules/monitoring/application/views/scripts/alertsummary/index.phtml
index 116074e80..5636893f3 100644
--- a/modules/monitoring/application/views/scripts/alertsummary/index.phtml
+++ b/modules/monitoring/application/views/scripts/alertsummary/index.phtml
@@ -1,7 +1,7 @@
 <?php if (! $this->compact): ?>
 <div class="controls">
     <?= $this->tabs; ?>
-    <div style="float: right;" class="dontprint">
+    <div style="float: right;" class="dont-print">
         <?= $intervalBox; ?>
     </div>
     <?= $this->limiter; ?>
diff --git a/modules/monitoring/application/views/scripts/list/comments.phtml b/modules/monitoring/application/views/scripts/list/comments.phtml
index b98bdd3a0..1dd5c4063 100644
--- a/modules/monitoring/application/views/scripts/list/comments.phtml
+++ b/modules/monitoring/application/views/scripts/list/comments.phtml
@@ -1,5 +1,5 @@
 <?php if (! $this->compact): ?>
-<div class="controls separated dont-print">
+<div class="controls separated">
     <?= $tabs ?>
     <?= $this->render('list/components/selectioninfo.phtml') ?>
     <div class="grid">
diff --git a/modules/monitoring/application/views/scripts/list/components/hostssummary.phtml b/modules/monitoring/application/views/scripts/list/components/hostssummary.phtml
index 688fafc0f..4b9f1cdd3 100644
--- a/modules/monitoring/application/views/scripts/list/components/hostssummary.phtml
+++ b/modules/monitoring/application/views/scripts/list/components/hostssummary.phtml
@@ -7,7 +7,7 @@ if (! $stats instanceof stdClass) {
     $stats = $stats->fetchRow();
 }
 ?>
-<div class="hosts-summary">
+<div class="hosts-summary dont-print">
     <span class="hosts-link"><?= $this->qlink(
         sprintf($this->translatePlural('%u Host', '%u Hosts', $stats->hosts_total), $stats->hosts_total),
         // @TODO(el): Fix that
diff --git a/modules/monitoring/application/views/scripts/list/components/servicesummary.phtml b/modules/monitoring/application/views/scripts/list/components/servicesummary.phtml
index a56c33c33..5b0bfc529 100644
--- a/modules/monitoring/application/views/scripts/list/components/servicesummary.phtml
+++ b/modules/monitoring/application/views/scripts/list/components/servicesummary.phtml
@@ -7,7 +7,7 @@ if (! $stats instanceof stdClass) {
     $stats = $stats->fetchRow();
 }
 ?>
-<div class="services-summary">
+<div class="services-summary dont-print">
     <span class="services-link"><?= $this->qlink(
         sprintf($this->translatePlural(
             '%u Service', '%u Services', $stats->services_total),
diff --git a/modules/monitoring/application/views/scripts/list/downtimes.phtml b/modules/monitoring/application/views/scripts/list/downtimes.phtml
index 9a07a0f15..7e0ef6876 100644
--- a/modules/monitoring/application/views/scripts/list/downtimes.phtml
+++ b/modules/monitoring/application/views/scripts/list/downtimes.phtml
@@ -3,7 +3,7 @@ use Icinga\Module\Monitoring\Object\Host;
 use Icinga\Module\Monitoring\Object\Service;
 
 if (! $this->compact): ?>
-<div class="controls separated dont-print">
+<div class="controls separated">
     <?= $tabs ?>
     <?= $this->render('list/components/selectioninfo.phtml') ?>
     <div class="grid">
diff --git a/modules/monitoring/application/views/scripts/list/hostgroups.phtml b/modules/monitoring/application/views/scripts/list/hostgroups.phtml
index 335903f1b..e90b9fd7b 100644
--- a/modules/monitoring/application/views/scripts/list/hostgroups.phtml
+++ b/modules/monitoring/application/views/scripts/list/hostgroups.phtml
@@ -20,13 +20,13 @@ if (! $this->compact): ?>
 <?php return; endif ?>
 <table class="table-row-selectable common-table" data-base-target="_next">
 <thead>
-<tr>
-    <th></th>
-    <th><?= $this->translate('Host Group') ?></th>
-    <th><?= $this->translate('Host States') ?></th>
-    <th></th>
-    <th><?= $this->translate('Service States') ?></th>
-</tr>
+    <tr>
+        <th></th>
+        <th><?= $this->translate('Host Group') ?></th>
+        <th><?= $this->translate('Host States') ?></th>
+        <th></th>
+        <th><?= $this->translate('Service States') ?></th>
+    </tr>
 </thead>
 <tbody>
 <?php foreach ($hostgroups->peekAhead($this->compact) as $hostgroup): ?>
diff --git a/modules/monitoring/application/views/scripts/list/servicegroups.phtml b/modules/monitoring/application/views/scripts/list/servicegroups.phtml
index 8be3836c7..398f2042f 100644
--- a/modules/monitoring/application/views/scripts/list/servicegroups.phtml
+++ b/modules/monitoring/application/views/scripts/list/servicegroups.phtml
@@ -18,9 +18,11 @@ if (! $this->compact): ?>
 <?php return; endif ?>
 <table class="table-row-selectable common-table" data-base-target="_next">
 <thead>
-    <th></th>
-    <th><?= $this->translate('Service Group') ?></th>
-    <th><?= $this->translate('Service States') ?></th>
+    <tr>
+        <th></th>
+        <th><?= $this->translate('Service Group') ?></th>
+        <th><?= $this->translate('Service States') ?></th>
+    </tr>
 </thead>
 <tbody>
 <?php foreach ($servicegroups->peekAhead($this->compact) as  $serviceGroup): ?>
diff --git a/modules/monitoring/public/css/tables.less b/modules/monitoring/public/css/tables.less
index 65247acb2..0f5c5b95f 100644
--- a/modules/monitoring/public/css/tables.less
+++ b/modules/monitoring/public/css/tables.less
@@ -186,12 +186,14 @@
   width: 100%;
 
   tr[href] {
+    .transition(background 0.2s ease);
+
     &.active {
-      background-color: @gray-lighter;
+      background-color: @tr-active-color;
     }
 
     &:hover {
-      background-color: @gray-lightest;
+      background-color: @tr-hover-color;
       cursor: pointer;
     }
   }
diff --git a/modules/setup/application/forms/AuthBackendPage.php b/modules/setup/application/forms/AuthBackendPage.php
index 24ca72b8d..85f5cf82e 100644
--- a/modules/setup/application/forms/AuthBackendPage.php
+++ b/modules/setup/application/forms/AuthBackendPage.php
@@ -116,21 +116,6 @@ class AuthBackendPage extends Form
         $this->addSubForm($backendForm, 'backend_form');
     }
 
-    /**
-     * Retrieve all form element values
-     *
-     * @param   bool    $suppressArrayNotation  Ignored
-     *
-     * @return  array
-     */
-    public function getValues($suppressArrayNotation = false)
-    {
-        $values = parent::getValues();
-        $values = array_merge($values, $values['backend_form']);
-        unset($values['backend_form']);
-        return $values;
-    }
-
     /**
      * Validate the given form data and check whether it's possible to authenticate using the configured backend
      *
diff --git a/modules/setup/application/forms/UserGroupBackendPage.php b/modules/setup/application/forms/UserGroupBackendPage.php
index 272949d54..7764848fe 100644
--- a/modules/setup/application/forms/UserGroupBackendPage.php
+++ b/modules/setup/application/forms/UserGroupBackendPage.php
@@ -129,19 +129,4 @@ class UserGroupBackendPage extends Form
             )
         );
     }
-
-    /**
-     * Retrieve all form element values
-     *
-     * @param   bool    $suppressArrayNotation  Ignored
-     *
-     * @return  array
-     */
-    public function getValues($suppressArrayNotation = false)
-    {
-        $values = parent::getValues();
-        $values = array_merge($values, $values['backend_form']);
-        unset($values['backend_form']);
-        return $values;
-    }
 }
diff --git a/public/css/icinga/base.less b/public/css/icinga/base.less
index 595618022..de5727780 100644
--- a/public/css/icinga/base.less
+++ b/public/css/icinga/base.less
@@ -31,6 +31,9 @@
 // Text color on <a>
 @link-color: @text-color;
 
+@tr-active-color: #E5F9FF;
+@tr-hover-color: #F5FDFF;
+
 // Font families
 @font-family: Calibri, Helvetica, sans-serif;
 @font-family-fixed: "Liberation Mono", "Lucida Console", Courier, monospace;
@@ -138,19 +141,11 @@ td, th {
   }
 }
 
-#layout {
-  background-color: @body-bg-color;
-  color: @text-color;
-  font-family: @font-family;
-}
-
-#main > .container, #menu, #header {
-  font-size: @font-size;
-  line-height: @line-height;
-}
-
-@media print {
-  .dont-print {
-    display: none;
-  }
+// Styles for when the page is loading. JS will remove this class once the document is ready
+.loading * {
+  // Disable all transition on page load
+  -webkit-transition: none !important;
+     -moz-transition: none !important;
+       -o-transition: none !important;
+          transition: none !important;
 }
diff --git a/public/css/icinga/footer-elements.less b/public/css/icinga/footer-elements.less
deleted file mode 100644
index f3b248b69..000000000
--- a/public/css/icinga/footer-elements.less
+++ /dev/null
@@ -1,50 +0,0 @@
-/*! Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
-
-div#footer {
-  position: fixed;
-  left: 0px;
-  right: 0px;
-  bottom: 0px;
-  z-index: 9999;
-}
-
-/** Notifications **/
-
-#notifications {
-  margin: 0;
-  padding: 0;
-}
-
-#notifications > li {
-  list-style-type: none;
-  display: block;
-  border-top: 1px solid #999;
-  color: white;
-  line-height: 2.5em;
-  padding-left: 3em;
-  background-repeat: no-repeat;
-  background-position: 1em center;
-}
-
-#notifications > li:hover {
-  cursor: pointer;
-}
-
-#notifications > li.info {
-  background-color: @colorFormNotificationInfo;
-}
-
-#notifications > li.warning {
-  background-color: @colorWarningHandled;
-}
-#notifications > li.error {
-  background-color: @colorCritical;
-  background-image: url(../img/icons/error_white.png);
-}
-
-#notifications > li.success {
-  background-color: #fe6;
-  background-image: url(../img/icons/success.png);
-  color: #333;
-}
-/** END of Notifications **/
diff --git a/public/css/icinga/header-elements.less b/public/css/icinga/header-elements.less
deleted file mode 100644
index 171117bbe..000000000
--- a/public/css/icinga/header-elements.less
+++ /dev/null
@@ -1,18 +0,0 @@
-/*! Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
-
-#logo {
-  height: 4.0em;
-  width: 13em;
-  display: inline-block;
-}
-
-#logo a {
-  display: block;
-  outline: 0;
-}
-
-#logo img {
-  width: 100px;
-  margin-left: 1.5em;
-  margin-top: 0.8em;
-}
diff --git a/public/css/icinga/layout-colors.less b/public/css/icinga/layout-colors.less
deleted file mode 100644
index 2cbcf95ab..000000000
--- a/public/css/icinga/layout-colors.less
+++ /dev/null
@@ -1,37 +0,0 @@
-/*! Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
-
-/* Layout colors */
-
-#sidebar {
-  background-color: @gray-lighter;
-}
-
-#header {
-  background-color: @icinga-blue;
-  color: #ddd;
-  color: #d0d0d0;
-}
-
-#header input {
-  background-color: #777;
-}
-
-#main {
-  background-color: white;
-}
-
-#col1.impact, #col2.impact, #col3.impact {
-  background-color: #ddd;
-  transition: background-color 2s 1s linear;
-  -moz-transition: background-color 2s 1s linear;
-  -o-transition: background-color 2s 1s linear;
-  -webkit-transition: background-color 2s 1s linear;
-  .controls {
-    background-color: #ddd;
-    transition: background-color 2s 1s linear;
-    -moz-transition: background-color 2s 1s linear;
-    -o-transition: background-color 2s 1s linear;
-    -webkit-transition: background-color 2s 1s linear;
-  }
-}
-
diff --git a/public/css/icinga/layout-structure.less b/public/css/icinga/layout-structure.less
index e0c4e394a..8815dfc25 100644
--- a/public/css/icinga/layout-structure.less
+++ b/public/css/icinga/layout-structure.less
@@ -96,7 +96,6 @@ html {
   .controls > ul.tabs {
     margin-top: 0;
     height: 1.5em;
-    background-color: @icinga-blue;
     font-size: 0.75em;
     padding: 0.2em 0 0;
   }
@@ -138,7 +137,6 @@ html {
 */
 .container .controls {
   top: 0;
-  background-color: white;
   padding: 1em 1em 0;
   z-index: 100;
 
@@ -267,42 +265,9 @@ html {
     margin-right: 1%;
   }
 
-  #logo img {
-    /* TODO: Quickfix, this needs improvement */
-    width: 0 !important;
-    top: -100px;
-    position: absolute;
-  }
   #main {
     left: 0;
   }
-
-  #login {
-    .below-logo label {
-      width: 100%;
-      margin: 0;
-      text-align: center;
-      display: inline-block;
-    }
-    .footer {
-      margin-left: 0;
-    }
-    h1 {
-      margin-left: 0px;
-      text-align: center;
-    }
-    form {
-      margin-left: auto;
-      margin-right: auto;
-    }
-    form input {
-      margin: auto;
-      display: block;
-    }
-    form input[type=submit] {
-      margin-top: 1.5em;
-    }
-  }
 }
 
 
diff --git a/public/css/icinga/layout.less b/public/css/icinga/layout.less
new file mode 100644
index 000000000..8563a1455
--- /dev/null
+++ b/public/css/icinga/layout.less
@@ -0,0 +1,121 @@
+/*! Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
+
+#footer {
+  position: fixed;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  z-index: 999;
+}
+
+#guest-error {
+  background-color: @icinga-blue;
+  height: 100%;
+  overflow: auto;
+}
+
+#guest-error #icinga-logo {
+  .fadein();
+}
+
+#guest-error-message {
+  .fadein();
+  color: @body-bg-color;
+  font-size: 2em;
+}
+
+#header,
+#main > .container,
+#menu {
+  font-size: @font-size;
+  line-height: @line-height;
+}
+
+#header {
+  background-color: @icinga-blue;
+}
+
+#header-logo-container {
+  height: 4em;
+  margin-left: 1.5em;
+  margin-top: 0.2em;
+  margin-bottom: 0.2em;
+  width: 100px;
+}
+
+#header-logo {
+  background-image: url('../img/logo_icinga-inv.png');
+  background-position: center;
+  background-repeat: no-repeat;
+  background-size: contain;
+  display: block;
+  height: 100%;
+}
+
+#icinga-logo {
+  background-image: url('../img/logo_icinga_big.png');
+  background-position: center;
+  background-repeat: no-repeat;
+  background-size: contain; // Does not work in IE < 10
+  height: 177px;
+  margin-bottom: 2em;
+  width: 100%;
+}
+
+#layout {
+  background-color: @body-bg-color;
+  color: @text-color;
+  font-family: @font-family;
+}
+
+#login {
+  overflow: auto;
+}
+
+#sidebar {
+  background-color: @gray-lighter;
+}
+
+.controls {
+  background-color: @body-bg-color;
+}
+
+// Notification styles
+
+#notifications {
+  margin: 0;
+  padding: 0;
+}
+
+#notifications > li {
+  list-style-type: none;
+  display: block;
+  border-top: 1px solid #999;
+  color: white;
+  line-height: 2.5em;
+  padding-left: 3em;
+  background-repeat: no-repeat;
+  background-position: 1em center;
+}
+
+#notifications > li:hover {
+  cursor: pointer;
+}
+
+#notifications > li.info {
+  background-color: @colorFormNotificationInfo;
+}
+
+#notifications > li.warning {
+  background-color: @colorWarningHandled;
+}
+#notifications > li.error {
+  background-color: @colorCritical;
+  background-image: url(../img/icons/error_white.png);
+}
+
+#notifications > li.success {
+  background-color: #fe6;
+  background-image: url(../img/icons/success.png);
+  color: #333;
+}
diff --git a/public/css/icinga/login.less b/public/css/icinga/login.less
index e9d8bd2cf..8255b19a0 100644
--- a/public/css/icinga/login.less
+++ b/public/css/icinga/login.less
@@ -1,189 +1,91 @@
 /*! Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
 
+// Login page styles
+
 #login {
+  #icinga-logo {
+    .fadein();
+  }
+
   background-color: @icinga-blue;
-  width: 100%;
-  height: 100%;
 
-  .form-controls {
-    margin: 0;
-  }
-
-  .control-group {
-    padding: 0;
-  }
-
-  .logo {
-    text-align: center;
-  }
-
-  .image {
-    padding-top: 5%;
-    margin-left: auto;
-    margin-right: auto;
-    text-align: center;
-    font-size: 0.9em;
+  .control-label {
+    color: @body-bg-color;
+    font-size: 1em;
+    line-height: @line-height;
   }
 
   .errors {
-    font-size: 0.9em;
-    margin-bottom: 0.5em;
-    margin-left:auto;
-    margin-right:auto;
-    padding: 0.5em;
-  }
+    background-color: @color-critical;
+    color: @body-bg-color;
+    font-size: @font-size-small;
+    margin: 2em 0 0 0;
 
-  .image img {
-    width: 355px;
-  }
-
-  .form {
-    position: absolute;
-    font-size: 0.9em;
-    top: 35%;
-    left: 0;
-    bottom: 0;
-    right: 0;
-  }
-
-  .form h1 {
-    text-align: center;
-    font-size: 1.5em;
-    margin-left: 2.3em;
-    border: none;
-    color: @text-color-inverted;
-    font-variant: unset;
-  }
-
-  .form div.element {
-    margin: 0;
-
-    ul.errors {
+    > li {
+      padding: 1em;
     }
   }
 
-  .form label {
-    color: @text-color-inverted;
-    font-weight: normal;
+  .control-group {
+    margin: 0 auto; // Center horizontally
+    width: 24em;
+  }
+
+  .control-label-group {
     display: block;
-    line-height: 2.5em;
-    width: 15em;
-    margin-right: 2.5em;
+    padding: 0;
     text-align: left;
-
+    width: 100%;
   }
 
-  form {
-    margin-left: auto;
-    margin-right: auto;
-    width: 18em;
-    font-size: 20px;
-  }
-
-  form input {
-    color: @text-color-inverted;
-    width: 18em;
-    padding: 0.5em;
-    background: rgba(255,255,255,0.2);
-    margin-left: 0;
-    padding: 6px 10px;
+  input[type=password],
+  input[type=text] {
+    background-color: @gray-light; // IE8 fallback
+    background-color: rgba(255,255,255,0.2);
     border: none;
     border-bottom: solid 3px @body-bg-color;
-    -webkit-transition: border 0.3s;
-    -moz-transition: border 0.3s;
-    -o-transition: border 0.3s;
-    transition: border 0.3s;
+    color: @body-bg-color;
+    display: block;
+    margin: 0;
+    width: 100%;
   }
 
-  form input:focus {
-    border-bottom: solid 3px @body-bg-color;
-    background: rgba(255,255,255,0.4);
-  }
-
-  ul.errors {
+  .form-controls {
+    margin-bottom: 2em;
+    margin-top: 2em;
   }
 
   input[type=submit] {
-    color: @text-color-inverted;
-    background: none;
-    border: none;
-    margin-top: 3em;
-    margin-right: 5px;
-    border: solid 3px @body-bg-color;
-    -webkit-transition: border 0.3s;
-    -moz-transition: border 0.3s;
-    -o-transition: border 0.3s;
+    .button(@icinga-blue, @body-bg-color);
+    margin: 0;
+    width: 100%;
   }
 
-  input[type=submit]:hover, a.button:hover, input[type=submit]:focus {
-    background: @body-bg-color;
-    color: @icinga-blue;
-  }
-
-  .footer {
-    color: @text-color-inverted;
-    margin-top: 5em;
-    font-size: 0.9em;
-    text-align: center;
-
-    a {
-      color: @text-color-inverted;
-      font-weight: bold;
-    }
-  }
-
-  p.config-note {
-    width: 50%;
-    padding: 1em;
-    margin: 0 auto 2.5em;
-    text-align: center;
+  .config-note {
     color: white;
     background-color: @color-critical;
+    margin: 0 auto 2em auto; // Center horizontally w/ bottom margin
+    max-width: 50%;
+    min-width: 24em;
+    padding: 1em;
 
     a {
       color: @text-color-inverted;
       font-weight: bold;
     }
   }
-
-  p.info-box {
-    width: 50%;
-    height: 2.2em;
-    margin: 2em auto 2.5em;
-
-    i.icon-info {
-      float: left;
-      height: 100%;
-    }
-
-    em {
-      text-decoration: underline;
-    }
-  }
 }
 
-  /* make keyframes that tell the start state and the end state of our object */
-  @-webkit-keyframes fadeIn { from { opacity:0; } to { opacity:1; } }
-  @-moz-keyframes fadeIn { from { opacity:0; } to { opacity:1; } }
-  @keyframes fadeIn { from { opacity:0; } to { opacity:1; } }
+#login-footer {
+  color: @body-bg-color;
+  font-size: @font-size-small;
 
-  .fade-in {
-    opacity:0;  /* make things invisible upon start */
-    -webkit-animation:fadeIn ease-in 1;  /* call our keyframe named fadeIn, use animattion ease-in and repeat it only 1 time */
-    -moz-animation:fadeIn ease-in 1;
-    animation:fadeIn ease-in 1;
+  a {
+    font-weight: @font-weight-bold;
 
-    -webkit-animation-fill-mode:forwards;  /* this makes sure that after animation is done we remain at the last keyframe value (opacity: 1)*/
-    -moz-animation-fill-mode:forwards;
-    animation-fill-mode:forwards;
-
-    -webkit-animation-duration:1s;
-    -moz-animation-duration:1s;
-    animation-duration:1s;
-  }
-
-  .fade-in.one {
-    -webkit-animation-delay: 0.7s;
-    -moz-animation-delay: 0.7s;
-    animation-delay: 0.7s;
+    // Social links
+    &:hover > i {
+      color: @text-color;
+    }
   }
+}
diff --git a/public/css/icinga/main.less b/public/css/icinga/main.less
index af1b809e6..e1067009e 100644
--- a/public/css/icinga/main.less
+++ b/public/css/icinga/main.less
@@ -3,8 +3,12 @@
 // Width for the name column--th--of name-value-table
 @name-value-table-name-width: 14em;
 
-.action-link {
-  color: @icinga-blue;
+.action-link(@color: @icinga-blue) {
+  color: @color;
+}
+
+.error-message {
+  font-weight: @font-weight-bold;
 }
 
 .large-icon {
@@ -58,9 +62,9 @@ a:hover > .icon-cancel {
 
 // Link styles
 
-.button-link {
-  .action-link();
-  .button();
+.button-link(@background-color: @body-bg-color, @color: @icinga-blue) {
+  .action-link(@color);
+  .button(@background-color, @color);
   display: inline-block;
   height: 35px;
   line-height: 20px;
@@ -164,13 +168,16 @@ a:hover > .icon-cancel {
   }
 
   tr[href] {
+    .transition(background 0.2s ease);
+
     &.active {
-      background-color: @gray-lighter;
+      background-color: @tr-active-color;
       border-left-color: @icinga-blue;
+      transition: none;
     }
 
     &:hover {
-      background-color: @gray-lightest;
+      background-color: @tr-hover-color;
       cursor: pointer;
     }
   }
@@ -227,3 +234,35 @@ a:hover > .icon-cancel {
     margin-left: 0.5em;
   }
 }
+
+/* Styles for centering content of unknown width and height both horizontally and vertically
+ *
+ * Example markup:
+ * <div class="centered-ghost">
+ *     <div class="centered-content">
+ *         <p>I'm centered.</p>
+ *     </div>
+ * </div>
+ */
+
+.centered-content {
+  display: inline-block;
+  vertical-align: middle;
+}
+
+.centered-ghost {
+  height: 100%;
+  text-align: center;
+  letter-spacing: -1em; // Remove gap between content and ghost
+}
+
+.centered-ghost > * {
+  letter-spacing: normal;
+}
+
+.centered-ghost:after {
+  content: '';
+  display: inline-block;
+  height: 100%;
+  vertical-align: middle;
+}
diff --git a/public/css/icinga/mixins.less b/public/css/icinga/mixins.less
index 01a2c1890..29fbe6808 100644
--- a/public/css/icinga/mixins.less
+++ b/public/css/icinga/mixins.less
@@ -12,22 +12,24 @@
           box-shadow: @arguments;
 }
 
-.button() {
+.button(@background-color: @body-bg-color, @color: @icinga-blue) {
   .rounded-corners(3px);
-  background-color: @body-bg-color;
-  border: 2px solid @icinga-blue;
-  color: @icinga-blue;
+
+  background-color: @background-color;
+  border: 2px solid @color;
+  color: @color;
   cursor: pointer;
   padding: @vertical-padding @horizontal-padding;
 
+  // Transition mixin does not work w/ comma-separated transistions
   -webkit-transition: background 0.3s ease, color 0.3s ease;
      -moz-transition: background 0.3s ease, color 0.3s ease;
        -o-transition: background 0.3s ease, color 0.3s ease;
           transition: background 0.3s ease, color 0.3s ease;
 
   &:hover {
-    background-color: @icinga-blue;
-    color: @text-color-inverted;
+    background-color: @color;
+    color: @background-color;
     text-decoration: none;
   }
 }
@@ -79,3 +81,49 @@
 .visible {
   visibility: visible;
 }
+
+// Fadein animation
+
+/* Chrome, WebKit */
+@-webkit-keyframes fadein {
+  from { opacity: 0; }
+  to   { opacity: 1; }
+}
+
+/* FF < 16 */
+@-moz-keyframes fadein {
+  from { opacity: 0; }
+  to   { opacity: 1; }
+}
+
+/* IE */
+@-ms-keyframes fadein {
+  from { opacity: 0; }
+  to   { opacity: 1; }
+}
+
+/* Opera < 12.1 */
+@-o-keyframes fadein {
+  from { opacity: 0; }
+  to   { opacity: 1; }
+}
+
+@keyframes fadein {
+  from { opacity: 0; }
+  to   { opacity: 1; }
+}
+
+.fadein() {
+  opacity: 0;
+
+  -webkit-animation: fadein 2s ease-in; /* Chrome, WebKit */
+     -moz-animation: fadein 2s ease-in; /* FF < 16 */
+       -o-animation: fadein 2s ease-in; /* Opera < 12.1 */
+          animation: fadein 2s ease-in;
+
+  // Make sure that after animation is done we remain at the last keyframe value (opacity: 1)
+  -webkit-animation-fill-mode: forwards;
+     -moz-animation-fill-mode: forwards;
+       -o-animation-fill-mode: forwards;
+          animation-fill-mode: forwards;
+}
diff --git a/public/css/icinga/print.less b/public/css/icinga/print.less
new file mode 100644
index 000000000..2e86f09b1
--- /dev/null
+++ b/public/css/icinga/print.less
@@ -0,0 +1,31 @@
+/*! Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
+
+// Print styles
+
+@media print {
+  #fileupload-frame-target,
+  #header,
+  #responsive-debug,
+  #sidebar,
+  .controls > .tabs,
+  .controls .filter,
+  .controls .limiter-control,
+  .controls .pagination-control,
+  .controls .selection-info,
+  .controls .sort-control,
+  .dontprint, // Compat only, use dont-print instead
+  .dont-print {
+    display: none;
+  }
+
+  #layout,
+  #main,
+  .controls {
+    position: static;
+  }
+
+  .container {
+    float: none !important;
+    width: 100% !important;
+  }
+}
diff --git a/public/css/pdf/pdfprint.less b/public/css/pdf/pdfprint.less
index 7b7855eaf..7f6c15e4e 100644
--- a/public/css/pdf/pdfprint.less
+++ b/public/css/pdf/pdfprint.less
@@ -1,6 +1,11 @@
 /*! Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
 
-.controls form, .controls .pagination, .controls .widgetLimiter, .controls > .tabs, .dontprint {
+.controls form,
+.controls .pagination,
+.controls .widgetLimiter,
+.controls > .tabs,
+.dontprint, // Compat only, use dont-print instead
+.dont-print {
   display: none !important;
 }
 
@@ -10,7 +15,7 @@ table.action img.inlinepie {
 }
 
 @page {
-	margin: 2cm;
+  margin: 2cm;
 }
 
 .container * {
@@ -26,15 +31,15 @@ body > h1 {
   font-weight: bold;
   position: fixed;
   left: 1em;
-	right: 1em;
-	color: #aaa;
-	font-size: 0.9em;
+  right: 1em;
+  color: #aaa;
+  font-size: 0.9em;
 }
 
 #page-header table, #page-footer table {
-	width: 100%;
-	border-collapse: collapse;
-	border: none;
+  width: 100%;
+  border-collapse: collapse;
+  border: none;
 }
 
 #page-header table {
@@ -45,12 +50,12 @@ body > h1 {
   font-family: fixed;
   padding: 0;
   color: #aaa;
-	width: 50%;
+  width: 50%;
 }
 
 #page-header {
   top: 0.5em;
-	border-bottom: 0.2pt solid #aaa;
+  border-bottom: 0.2pt solid #aaa;
 }
 
 #page-footer {
@@ -93,4 +98,3 @@ h1 form {
 body {
   margin: 1cm 1cm 1.5cm 1cm;
 }
-
diff --git a/public/js/icinga/events.js b/public/js/icinga/events.js
index ea61a0542..a0ef84e06 100644
--- a/public/js/icinga/events.js
+++ b/public/js/icinga/events.js
@@ -161,6 +161,7 @@
         },
 
         onLoad: function (event) {
+            $('body').removeClass('loading');
             //$('.container').trigger('rendered');
         },