diff --git a/core/modules/node/src/Form/NodePreviewForm.php b/core/modules/node/src/Form/NodePreviewForm.php
index 52f0267..3bb5415 100644
--- a/core/modules/node/src/Form/NodePreviewForm.php
+++ b/core/modules/node/src/Form/NodePreviewForm.php
@@ -83,7 +83,7 @@ public function buildForm(array $form, FormStateInterface $form_state, EntityInt
       '#type' => 'link',
       '#title' => $this->t('Back to content editing'),
       '#url' => $node->isNew() ? Url::fromRoute('node.add', ['node_type' => $node->bundle()]) : $node->urlInfo('edit-form'),
-      '#options' => array('attributes' => array('class' => array('node-preview-backlink'))) + $query_options,
+      '#options' => $query_options,
     );
 
     $view_mode_options = $this->getViewModeOptions($node);
diff --git a/core/themes/bartik/css/style.css b/core/themes/bartik/css/style.css
index 76ec800..de5a388 100644
--- a/core/themes/bartik/css/style.css
+++ b/core/themes/bartik/css/style.css
@@ -81,7 +81,7 @@ samp,
 var {
   padding: 0 0.4em;
   font-size: 0.857em;
-  font-family: Menlo, Consolas, "Andale Mono", "Lucida Console", "Nimbus Mono L", "DejaVu Sans Mono", monospace, "Courier New";
+  font-family: "Lucida Grande", "Lucida Sans Unicode", "DejaVu Sans", "Lucida Sans", sans-serif;
 }
 code {
   background-color: #f2f2f2;
@@ -857,66 +857,14 @@ ul.links {
   border-right: 1px solid #fff4f4;
 }
 .node-preview-container {
-  background: #d1e8f5;
-  background-image: -webkit-linear-gradient(top, #d1e8f5, #d3e8f4);
-  background-image: linear-gradient(to bottom, #d1e8f5, #d3e8f4);
-  font-family: Arial, sans-serif;
+  background: #fffce5;
+  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
   box-shadow: 0 1px 3px 1px rgba(0, 0, 0, 0.3333);
   position: fixed;
   z-index: 499;
   width: 100%;
   padding: 10px;
 }
-.node-preview-backlink {
-  background-color: #419ff1;
-  background: url(../../../misc/icons/000000/chevron-left.svg) left no-repeat, -webkit-linear-gradient(top, #419ff1, #1076d5);
-  background: url(../../../misc/icons/000000/chevron-left.svg) left no-repeat, linear-gradient(to bottom, #419ff1, #1076d5); /* LTR */
-  border: 1px solid #0048c8;
-  border-radius: .4em;
-  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .4);
-  color: #fff;
-  font-size: 0.9em;
-  line-height: normal;
-  margin: 0;
-  padding: 4px 1em 4px 0.6em; /* LTR */
-  text-shadow: 1px 1px 0 rgba(0, 0, 0, 0.5);
-}
-[dir="rtl"] .node-preview-backlink {
-  background: url(../../../misc/icons/000000/chevron-right.svg) right no-repeat, -webkit-linear-gradient(top, #419ff1, #1076d5);
-  background: url(../../../misc/icons/000000/chevron-right.svg) right no-repeat, linear-gradient(to bottom, #419ff1, #1076d5);
-  padding: 4px 0.6em 4px 1em;
-  float: right;
-}
-.node-preview-backlink:focus,
-.node-preview-backlink:hover {
-  background-color: #419cf1;
-  background: url(../../../misc/icons/000000/chevron-left.svg) left no-repeat, -webkit-linear-gradient(top, #59abf3, #2a90ef);
-  background: url(../../../misc/icons/000000/chevron-left.svg) left no-repeat, linear-gradient(to bottom, #59abf3, #2a90ef); /* LTR */
-  border: 1px solid #0048c8;
-  text-decoration: none;
-  color: #fff;
-}
-[dir="rtl"] .node-preview-backlink:focus,
-[dir="rtl"] .node-preview-backlink:hover {
-  background: url(../../../misc/icons/000000/chevron-right.svg) right no-repeat, -webkit-linear-gradient(top, #59abf3, #2a90ef);
-  background: url(../../../misc/icons/000000/chevron-right.svg) right no-repeat, linear-gradient(to bottom, #59abf3, #2a90ef);
-}
-.node-preview-backlink:active {
-  background-color: #0e69be;
-  background: url(../../../misc/icons/000000/chevron-left.svg) left no-repeat, -webkit-linear-gradient(top, #0e69be, #2a93ef);
-  background: url(../../../misc/icons/000000/chevron-left.svg) left no-repeat, linear-gradient(to bottom, #0e69be, #2a93ef); /* LTR */
-  border: 1px solid #0048c8;
-  box-shadow: inset 0 1px 2px rgba(0, 0, 0, .25);
-}
-.node-preview-backlink:active {
-  background: url(../../../misc/icons/000000/chevron-right.svg) right no-repeat, -webkit-linear-gradient(top, #0e69be, #2a93ef);
-  background: url(../../../misc/icons/000000/chevron-right.svg) right no-repeat, linear-gradient(to bottom, #0e69be, #2a93ef);
-}
-.node-preview-backlink::before {
-  content: '';
-  width: 10px;
-  display: inline-block;
-}
 
 /* ----------------- Comments ----------------- */