Index: src/__celerity_resource_map__.php
===================================================================
--- src/__celerity_resource_map__.php
+++ src/__celerity_resource_map__.php
@@ -3342,7 +3342,7 @@
   ),
   'phabricator-main-menu-view' =>
   array(
-    'uri' => '/res/ef11f2fc/rsrc/css/application/base/main-menu-view.css',
+    'uri' => '/res/95ff522a/rsrc/css/application/base/main-menu-view.css',
     'type' => 'css',
     'requires' =>
     array(
@@ -4309,7 +4309,7 @@
 ), array(
   'packages' =>
   array(
-    '71e32b00' =>
+    'c35f1eca' =>
     array(
       'name' => 'core.pkg.css',
       'symbols' =>
@@ -4358,7 +4358,7 @@
         41 => 'phabricator-tag-view-css',
         42 => 'phui-list-view-css',
       ),
-      'uri' => '/res/pkg/71e32b00/core.pkg.css',
+      'uri' => '/res/pkg/c35f1eca/core.pkg.css',
       'type' => 'css',
     ),
     '2c1dba03' =>
@@ -4550,15 +4550,15 @@
   ),
   'reverse' =>
   array(
-    'aphront-dialog-view-css' => '71e32b00',
-    'aphront-error-view-css' => '71e32b00',
-    'aphront-list-filter-view-css' => '71e32b00',
-    'aphront-pager-view-css' => '71e32b00',
-    'aphront-panel-view-css' => '71e32b00',
-    'aphront-table-view-css' => '71e32b00',
-    'aphront-tokenizer-control-css' => '71e32b00',
-    'aphront-tooltip-css' => '71e32b00',
-    'aphront-typeahead-control-css' => '71e32b00',
+    'aphront-dialog-view-css' => 'c35f1eca',
+    'aphront-error-view-css' => 'c35f1eca',
+    'aphront-list-filter-view-css' => 'c35f1eca',
+    'aphront-pager-view-css' => 'c35f1eca',
+    'aphront-panel-view-css' => 'c35f1eca',
+    'aphront-table-view-css' => 'c35f1eca',
+    'aphront-tokenizer-control-css' => 'c35f1eca',
+    'aphront-tooltip-css' => 'c35f1eca',
+    'aphront-typeahead-control-css' => 'c35f1eca',
     'differential-changeset-view-css' => '7cd7e387',
     'differential-core-view-css' => '7cd7e387',
     'differential-inline-comment-editor' => '5e9e5c4e',
@@ -4572,7 +4572,7 @@
     'differential-table-of-contents-css' => '7cd7e387',
     'diffusion-commit-view-css' => '270f4eb4',
     'diffusion-icons-css' => '270f4eb4',
-    'global-drag-and-drop-css' => '71e32b00',
+    'global-drag-and-drop-css' => 'c35f1eca',
     'inline-comment-summary-css' => '7cd7e387',
     'javelin-aphlict' => '2c1dba03',
     'javelin-behavior' => '3e3be199',
@@ -4647,56 +4647,56 @@
     'javelin-util' => '3e3be199',
     'javelin-vector' => '3e3be199',
     'javelin-workflow' => '3e3be199',
-    'lightbox-attachment-css' => '71e32b00',
+    'lightbox-attachment-css' => 'c35f1eca',
     'maniphest-task-summary-css' => '49898640',
-    'phabricator-action-list-view-css' => '71e32b00',
-    'phabricator-application-launch-view-css' => '71e32b00',
+    'phabricator-action-list-view-css' => 'c35f1eca',
+    'phabricator-application-launch-view-css' => 'c35f1eca',
     'phabricator-busy' => '2c1dba03',
     'phabricator-content-source-view-css' => '7cd7e387',
-    'phabricator-core-css' => '71e32b00',
-    'phabricator-crumbs-view-css' => '71e32b00',
+    'phabricator-core-css' => 'c35f1eca',
+    'phabricator-crumbs-view-css' => 'c35f1eca',
     'phabricator-drag-and-drop-file-upload' => '5e9e5c4e',
     'phabricator-dropdown-menu' => '2c1dba03',
     'phabricator-file-upload' => '2c1dba03',
-    'phabricator-filetree-view-css' => '71e32b00',
-    'phabricator-flag-css' => '71e32b00',
+    'phabricator-filetree-view-css' => 'c35f1eca',
+    'phabricator-flag-css' => 'c35f1eca',
     'phabricator-hovercard' => '2c1dba03',
-    'phabricator-jump-nav' => '71e32b00',
+    'phabricator-jump-nav' => 'c35f1eca',
     'phabricator-keyboard-shortcut' => '2c1dba03',
     'phabricator-keyboard-shortcut-manager' => '2c1dba03',
-    'phabricator-main-menu-view' => '71e32b00',
+    'phabricator-main-menu-view' => 'c35f1eca',
     'phabricator-menu-item' => '2c1dba03',
-    'phabricator-nav-view-css' => '71e32b00',
+    'phabricator-nav-view-css' => 'c35f1eca',
     'phabricator-notification' => '2c1dba03',
-    'phabricator-notification-css' => '71e32b00',
-    'phabricator-notification-menu-css' => '71e32b00',
+    'phabricator-notification-css' => 'c35f1eca',
+    'phabricator-notification-menu-css' => 'c35f1eca',
     'phabricator-object-selector-css' => '7cd7e387',
     'phabricator-phtize' => '2c1dba03',
     'phabricator-prefab' => '2c1dba03',
     'phabricator-project-tag-css' => '49898640',
-    'phabricator-remarkup-css' => '71e32b00',
+    'phabricator-remarkup-css' => 'c35f1eca',
     'phabricator-shaped-request' => '5e9e5c4e',
-    'phabricator-side-menu-view-css' => '71e32b00',
-    'phabricator-standard-page-view' => '71e32b00',
-    'phabricator-tag-view-css' => '71e32b00',
+    'phabricator-side-menu-view-css' => 'c35f1eca',
+    'phabricator-standard-page-view' => 'c35f1eca',
+    'phabricator-tag-view-css' => 'c35f1eca',
     'phabricator-textareautils' => '2c1dba03',
     'phabricator-tooltip' => '2c1dba03',
-    'phabricator-transaction-view-css' => '71e32b00',
-    'phabricator-zindex-css' => '71e32b00',
-    'phui-button-css' => '71e32b00',
-    'phui-form-css' => '71e32b00',
-    'phui-form-view-css' => '71e32b00',
-    'phui-header-view-css' => '71e32b00',
-    'phui-icon-view-css' => '71e32b00',
-    'phui-list-view-css' => '71e32b00',
-    'phui-object-item-list-view-css' => '71e32b00',
-    'phui-property-list-view-css' => '71e32b00',
-    'phui-spacing-css' => '71e32b00',
-    'sprite-apps-large-css' => '71e32b00',
-    'sprite-gradient-css' => '71e32b00',
-    'sprite-icons-css' => '71e32b00',
-    'sprite-menu-css' => '71e32b00',
-    'sprite-status-css' => '71e32b00',
-    'syntax-highlighting-css' => '71e32b00',
+    'phabricator-transaction-view-css' => 'c35f1eca',
+    'phabricator-zindex-css' => 'c35f1eca',
+    'phui-button-css' => 'c35f1eca',
+    'phui-form-css' => 'c35f1eca',
+    'phui-form-view-css' => 'c35f1eca',
+    'phui-header-view-css' => 'c35f1eca',
+    'phui-icon-view-css' => 'c35f1eca',
+    'phui-list-view-css' => 'c35f1eca',
+    'phui-object-item-list-view-css' => 'c35f1eca',
+    'phui-property-list-view-css' => 'c35f1eca',
+    'phui-spacing-css' => 'c35f1eca',
+    'sprite-apps-large-css' => 'c35f1eca',
+    'sprite-gradient-css' => 'c35f1eca',
+    'sprite-icons-css' => 'c35f1eca',
+    'sprite-menu-css' => 'c35f1eca',
+    'sprite-status-css' => 'c35f1eca',
+    'syntax-highlighting-css' => 'c35f1eca',
   ),
 ));
Index: src/__phutil_library_map__.php
===================================================================
--- src/__phutil_library_map__.php
+++ src/__phutil_library_map__.php
@@ -2497,11 +2497,7 @@
     'DifferentialHunk' => 'DifferentialDAO',
     'DifferentialHunkParserTestCase' => 'PhabricatorTestCase',
     'DifferentialHunkTestCase' => 'ArcanistPhutilTestCase',
-    'DifferentialInlineComment' =>
-    array(
-      0 => 'DifferentialDAO',
-      1 => 'PhabricatorInlineCommentInterface',
-    ),
+    'DifferentialInlineComment' => 'PhabricatorInlineCommentInterface',
     'DifferentialInlineCommentEditController' => 'PhabricatorInlineCommentController',
     'DifferentialInlineCommentEditView' => 'AphrontView',
     'DifferentialInlineCommentPreviewController' => 'PhabricatorInlineCommentPreviewController',
Index: src/infrastructure/celerity/CelerityResourceTransformer.php
===================================================================
--- src/infrastructure/celerity/CelerityResourceTransformer.php
+++ src/infrastructure/celerity/CelerityResourceTransformer.php
@@ -39,6 +39,7 @@
 
     switch ($type) {
       case 'css':
+        $data = $this->replaceCSSPrintRules($path, $data);
         $data = $this->replaceCSSVariables($path, $data);
         $data = preg_replace_callback(
           '@url\s*\((\s*[\'"]?.*?)\)@s',
@@ -129,6 +130,14 @@
       $data);
   }
 
+  private function replaceCSSPrintRules($path, $data) {
+    $this->currentPath = $path;
+    return preg_replace_callback(
+      '/!print\s+(.+?{.+?})/s',
+      array($this, 'replaceCSSPrintRule'),
+      $data);
+  }
+
   public static function getCSSVariableMap() {
     return array(
       // Base Colors
@@ -174,6 +183,7 @@
     );
   }
 
+
   public function replaceCSSVariable($matches) {
     static $map;
     if (!$map) {
@@ -190,4 +200,13 @@
     return $map[$var_name];
   }
 
+  public function replaceCSSPrintRule($matches) {
+    $rule = $matches[1];
+
+    $rules = array();
+    $rules[] = '.printable '.$rule;
+    $rules[] = "@media print {\n  ".str_replace("\n", "\n  ", $rule)."\n}\n";
+
+    return implode("\n\n", $rules);
+  }
 }
Index: src/infrastructure/celerity/__tests__/transformer/print.css
===================================================================
--- /dev/null
+++ src/infrastructure/celerity/__tests__/transformer/print.css
@@ -0,0 +1,14 @@
+~~~~~~
+!print .example {
+  background: #ffffff;
+}
+~~~~~~
+.printable .example {
+  background: #ffffff;
+}
+
+@media print {
+  .example {
+    background: #ffffff;
+  }
+}
Index: src/view/page/PhabricatorStandardPageView.php
===================================================================
--- src/view/page/PhabricatorStandardPageView.php
+++ src/view/page/PhabricatorStandardPageView.php
@@ -424,6 +424,10 @@
       $classes[] = 'platform-linux';
     }
 
+    if ($this->getRequest()->getStr('__print__')) {
+      $classes[] = 'printable';
+    }
+
     return implode(' ', $classes);
   }
 
Index: webroot/rsrc/css/application/base/main-menu-view.css
===================================================================
--- webroot/rsrc/css/application/base/main-menu-view.css
+++ webroot/rsrc/css/application/base/main-menu-view.css
@@ -400,3 +400,11 @@
 .phabricator-application-menu .phui-list-item-name {
   padding-left: 12px;
 }
+
+
+/* - Print ---------------------------------------------------------------------
+*/
+
+!print .phabricator-main-menu {
+  display: none;
+}