diff --git a/core/tests/Drupal/Tests/Core/Extension/ThemeHandlerTest.php b/core/tests/Drupal/Tests/Core/Extension/ThemeHandlerTest.php
index 3d89abe..dcdaa83 100644
--- a/core/tests/Drupal/Tests/Core/Extension/ThemeHandlerTest.php
+++ b/core/tests/Drupal/Tests/Core/Extension/ThemeHandlerTest.php
@@ -174,7 +174,7 @@ public function testRebuildThemeData() {
 
     // Ensure that the css paths are set with the proper prefix.
     $this->assertEquals(array(
-      'screen' => array(
+      'all' => array(
         'css/base/elements.css' => DRUPAL_ROOT . '/core/themes/seven/css/base/elements.css',
         'css/components/admin-list.css' => DRUPAL_ROOT . '/core/themes/seven/css/components/admin-list.css',
         'css/components/admin-options.css' => DRUPAL_ROOT . '/core/themes/seven/css/components/admin-options.css',
diff --git a/core/themes/seven/css/layout/layout.css b/core/themes/seven/css/layout/layout.css
index 7bab284..d2327bd 100644
--- a/core/themes/seven/css/layout/layout.css
+++ b/core/themes/seven/css/layout/layout.css
@@ -18,10 +18,10 @@
   [dir="rtl"] .layout-column {
     float: right;
   }
-  .layout-column + .layout-column {
+  .layout-column  .layout-column {
     padding-left: 10px; /* LTR */
   }
-  [dir="rtl"] .layout-column + .layout-column {
+  [dir="rtl"] .layout-column  .layout-column {
     padding-right: 10px;
     padding-left: 0;
   }
@@ -42,3 +42,87 @@
 .region-content {
   margin-bottom: 80px;
 }
+
+/**
+ * Print styles
+ */
+@media print {
+
+  * {
+    background-color: transparent !important;
+    color: #000 !important; /* Black prints faster: h5bp.com/s */
+    box-shadow: none !important;
+    text-shadow: none !important;
+  }
+  body {
+    padding-top: 0;
+  }
+  a,
+  a:visited {
+    text-decoration: underline;
+  }
+  pre,
+  blockquote {
+    border: 1px solid #999;
+    page-break-inside: avoid;
+  }
+  thead {
+    display: table-header-group; /* h5bp.com/t */
+  }
+  tr,
+  img {
+    page-break-inside: avoid;
+  }
+  img {
+    max-width: 100% !important;
+  }
+  p,
+  h2,
+  h3 {
+    orphans: 3;
+    widows: 3;
+  }
+  h2,
+  h3 {
+    page-break-after: avoid;
+  }
+  a,
+  .link {
+    color: #000;
+    text-decoration: underline;
+  }
+
+  #toolbar-administration {
+    display: none !important;
+  }
+  .messages {
+    border-width: 1px;
+    border-left-color: #999;
+  }
+  .is-collapse-enabled .tabs {
+    max-height: 999em;
+  }
+  .is-horizontal .tabs__tab {
+    margin: 0 4px !important;
+    border-radius: 4px 4px 0 0 !important;
+  }
+  .dropbutton-multiple .dropbutton .secondary-action {
+    display: block;
+  }
+  .js .dropbutton-widget {
+    position: relative;
+  }
+  .js .dropbutton .dropbutton-toggle {
+    display: none;
+  }
+  input.form-autocomplete, input.form-text, input.form-tel, input.form-email, input.form-url, input.form-search, input.form-number, input.form-color, input.form-file, textarea.form-textarea, select.form-select {
+    -webkit-appearance: none;
+    border-width: 1px;
+  }
+  .admin-dblog .icon {
+    -webkit-print-color-adjust:exact;
+  }
+  #toolbar-administration {
+    display: none;
+  }
+}
diff --git a/core/themes/seven/seven.info.yml b/core/themes/seven/seven.info.yml
index 2357e5e..3556da5 100644
--- a/core/themes/seven/seven.info.yml
+++ b/core/themes/seven/seven.info.yml
@@ -8,7 +8,7 @@ package: Core
 version: VERSION
 core: 8.x
 stylesheets:
-  screen:
+  all:
     - css/base/elements.css
     - css/components/admin-list.css
     - css/components/admin-options.css