[gtk+] theme: linear-gradient() needs 2 color-stops



commit fd373162b547b777d9c31cdc2fc84b2e337e0d52
Author: Benjamin Otte <otte redhat com>
Date:   Mon Mar 28 01:50:32 2016 +0200

    theme: linear-gradient() needs 2 color-stops
    
    So make sure our _solid() function gives it two.

 gtk/theme/Adwaita/_drawing.scss                  |    2 +-
 gtk/theme/Adwaita/gtk-contained-dark.css         |  192 +++++++++++-----------
 gtk/theme/Adwaita/gtk-contained.css              |  192 +++++++++++-----------
 gtk/theme/HighContrast/_drawing.scss             |    2 +-
 gtk/theme/HighContrast/gtk-contained-inverse.css |   18 +-
 gtk/theme/HighContrast/gtk-contained.css         |   18 +-
 6 files changed, 212 insertions(+), 212 deletions(-)
---
diff --git a/gtk/theme/Adwaita/_drawing.scss b/gtk/theme/Adwaita/_drawing.scss
index 731b3a2..f48ed6b 100644
--- a/gtk/theme/Adwaita/_drawing.scss
+++ b/gtk/theme/Adwaita/_drawing.scss
@@ -10,7 +10,7 @@
 
 @function _solid($c) {
 // solid color image
-  @return linear-gradient(to bottom, $c);
+  @return linear-gradient(to bottom, $c, $c);
 }
 
 @mixin _shadows($shadow1, $shadow2:none, $shadow3:none, $shadow4:none) {
diff --git a/gtk/theme/Adwaita/gtk-contained-dark.css b/gtk/theme/Adwaita/gtk-contained-dark.css
index 490a25c..af01177 100644
--- a/gtk/theme/Adwaita/gtk-contained-dark.css
+++ b/gtk/theme/Adwaita/gtk-contained-dark.css
@@ -77,7 +77,7 @@ textview text {
 
 textview border {
   background-color: #313434;
-  background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.2));
+  background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.2));
   background-repeat: no-repeat; }
   textview border:backdrop {
     background-color: #333636; }
@@ -469,7 +469,7 @@ button {
     color: #eeeeec;
     outline-color: rgba(238, 238, 236, 0.3);
     border-color: #212424;
-    background-image: linear-gradient(to bottom, #2a2f2f);
+    background-image: linear-gradient(to bottom, #2a2f2f, #2a2f2f);
     box-shadow: inset 0 1px rgba(255, 255, 255, 0);
     text-shadow: none;
     -gtk-icon-shadow: none;
@@ -478,7 +478,7 @@ button {
   button:backdrop.flat,
   button:backdrop {
     border-color: #262929;
-    background-image: linear-gradient(to bottom, #393f3f);
+    background-image: linear-gradient(to bottom, #393f3f, #393f3f);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0);
@@ -496,7 +496,7 @@ button {
     button:backdrop:active,
     button:backdrop:checked {
       border-color: #262929;
-      background-image: linear-gradient(to bottom, #323737);
+      background-image: linear-gradient(to bottom, #323737, #323737);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
       notebook > header > tabs > arrow:backdrop:active label, button.sidebar-button:backdrop:active label, 
button.titlebutton:backdrop:active label, notebook > header > tabs > arrow:backdrop:active, 
button.sidebar-button:backdrop:active, button.titlebutton:backdrop:active, notebook > header > tabs > 
arrow:backdrop:checked label, button.sidebar-button:backdrop:checked label, 
button.titlebutton:backdrop:checked label, notebook > header > tabs > arrow:backdrop:checked, 
button.sidebar-button:backdrop:checked, button.titlebutton:backdrop:checked, notebook > header > tabs > 
arrow:backdrop:active label, button.titlebutton:backdrop:active label, notebook > header > tabs > 
arrow:backdrop:active, button.titlebutton:backdrop:active, notebook > header > tabs > arrow:backdrop:checked 
label, button.titlebutton:backdrop:checked label, notebook > header > tabs > arrow:backdrop:checked, 
button.titlebutton:backdrop:checked,
       button:backdrop.flat:active label,
@@ -512,7 +512,7 @@ button {
     button:backdrop.flat:disabled,
     button:backdrop:disabled {
       border-color: #262929;
-      background-image: linear-gradient(to bottom, #333636);
+      background-image: linear-gradient(to bottom, #333636, #333636);
       text-shadow: none;
       -gtk-icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -528,7 +528,7 @@ button {
       button:backdrop:disabled:active,
       button:backdrop:disabled:checked {
         border-color: #262929;
-        background-image: linear-gradient(to bottom, #272929);
+        background-image: linear-gradient(to bottom, #272929, #272929);
         box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
         notebook > header > tabs > arrow:backdrop:disabled:active label, 
button.sidebar-button:backdrop:disabled:active label, button.titlebutton:backdrop:disabled:active label, 
notebook > header > tabs > arrow:backdrop:disabled:checked label, 
button.sidebar-button:backdrop:disabled:checked label, button.titlebutton:backdrop:disabled:checked label, 
notebook > header > tabs > arrow:backdrop:disabled:active label, button.titlebutton:backdrop:disabled:active 
label, notebook > header > tabs > arrow:backdrop:disabled:checked label, 
button.titlebutton:backdrop:disabled:checked label,
         button:backdrop.flat:disabled:active label,
@@ -549,7 +549,7 @@ button {
   notebook > header > tabs > arrow:disabled, button.titlebutton:disabled,
   button:disabled {
     border-color: #212424;
-    background-image: linear-gradient(to bottom, #333636);
+    background-image: linear-gradient(to bottom, #333636, #333636);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -606,7 +606,7 @@ button.osd {
   outline-color: rgba(238, 238, 236, 0.3);
   color: #eeeeec;
   border-color: rgba(0, 0, 0, 0.7);
-  background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+  background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
   background-clip: padding-box;
   box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
   text-shadow: 0 1px black;
@@ -619,7 +619,7 @@ button.osd {
   button.osd:hover {
     color: white;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(60, 69, 71, 0.8));
+    background-image: linear-gradient(to bottom, rgba(60, 69, 71, 0.8), rgba(60, 69, 71, 0.8));
     background-clip: padding-box;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
     text-shadow: 0 1px black;
@@ -631,7 +631,7 @@ button.osd {
   button.osd:checked {
     color: white;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7));
+    background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7));
     background-clip: padding-box;
     box-shadow: none;
     text-shadow: none;
@@ -643,7 +643,7 @@ button.osd {
   button.osd:disabled {
     color: #878a89;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5));
+    background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5), rgba(53, 57, 58, 0.5));
     background-clip: padding-box;
     box-shadow: none;
     text-shadow: none;
@@ -652,7 +652,7 @@ button.osd {
   button.osd:backdrop {
     color: #eeeeec;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+    background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
     background-clip: padding-box;
     box-shadow: none;
     text-shadow: none;
@@ -663,7 +663,7 @@ button.osd {
 button {
   color: #eeeeec;
   border-color: rgba(0, 0, 0, 0.7);
-  background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+  background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
   background-clip: padding-box;
   box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
   text-shadow: 0 1px black;
@@ -673,7 +673,7 @@ button {
   button:hover {
     color: white;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(60, 69, 71, 0.8));
+    background-image: linear-gradient(to bottom, rgba(60, 69, 71, 0.8), rgba(60, 69, 71, 0.8));
     background-clip: padding-box;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
     text-shadow: 0 1px black;
@@ -686,7 +686,7 @@ button {
   button:checked {
     color: white;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7));
+    background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7));
     background-clip: padding-box;
     box-shadow: none;
     text-shadow: none;
@@ -697,7 +697,7 @@ button {
   button:disabled {
     color: #878a89;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5));
+    background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5), rgba(53, 57, 58, 0.5));
     background-clip: padding-box;
     box-shadow: none;
     text-shadow: none;
@@ -706,7 +706,7 @@ button {
   button:backdrop {
     color: #eeeeec;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+    background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
     background-clip: padding-box;
     box-shadow: none;
     text-shadow: none;
@@ -726,7 +726,7 @@ button {
     button.flat:hover {
       color: white;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(60, 69, 71, 0.8));
+      background-image: linear-gradient(to bottom, rgba(60, 69, 71, 0.8), rgba(60, 69, 71, 0.8));
       background-clip: padding-box;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
       text-shadow: 0 1px black;
@@ -736,7 +736,7 @@ button {
     button.flat:disabled {
       color: #878a89;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5));
+      background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5), rgba(53, 57, 58, 0.5));
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -757,7 +757,7 @@ button {
     button.flat:checked {
       color: white;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7));
+      background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7));
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -795,7 +795,7 @@ button.suggested-action {
     color: white;
     outline-color: rgba(255, 255, 255, 0.3);
     border-color: #0f2b48;
-    background-image: linear-gradient(to bottom, #1b4e83);
+    background-image: linear-gradient(to bottom, #1b4e83, #1b4e83);
     box-shadow: inset 0 1px rgba(255, 255, 255, 0);
     text-shadow: none;
     -gtk-icon-shadow: none; }
@@ -803,7 +803,7 @@ button.suggested-action {
   button.suggested-action:backdrop,
   button.suggested-action.flat:backdrop {
     border-color: #0f2b48;
-    background-image: linear-gradient(to bottom, #215d9c);
+    background-image: linear-gradient(to bottom, #215d9c, #215d9c);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -819,7 +819,7 @@ button.suggested-action {
     button.suggested-action.flat:backdrop:active,
     button.suggested-action.flat:backdrop:checked {
       border-color: #0f2b48;
-      background-image: linear-gradient(to bottom, #184472);
+      background-image: linear-gradient(to bottom, #184472, #184472);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
       .selection-mode button.titlebutton:backdrop:active label, .selection-mode 
button.titlebutton:backdrop:active, .selection-mode button.titlebutton:backdrop:checked label, 
.selection-mode button.titlebutton:backdrop:checked,
       button.suggested-action:backdrop:active label,
@@ -835,7 +835,7 @@ button.suggested-action {
     button.suggested-action:backdrop:disabled,
     button.suggested-action.flat:backdrop:disabled {
       border-color: #262929;
-      background-image: linear-gradient(to bottom, #333636);
+      background-image: linear-gradient(to bottom, #333636, #333636);
       text-shadow: none;
       -gtk-icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -851,7 +851,7 @@ button.suggested-action {
       button.suggested-action.flat:backdrop:disabled:active,
       button.suggested-action.flat:backdrop:disabled:checked {
         border-color: #0f2b48;
-        background-image: linear-gradient(to bottom, #1d4877);
+        background-image: linear-gradient(to bottom, #1d4877, #1d4877);
         box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
         .selection-mode button.titlebutton:backdrop:disabled:active label, .selection-mode 
button.titlebutton:backdrop:disabled:checked label,
         button.suggested-action:backdrop:disabled:active label,
@@ -872,7 +872,7 @@ button.suggested-action {
     color: rgba(33, 93, 156, 0.8); }
   button.suggested-action:disabled {
     border-color: #212424;
-    background-image: linear-gradient(to bottom, #333636);
+    background-image: linear-gradient(to bottom, #333636, #333636);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -893,7 +893,7 @@ button.suggested-action {
   button.suggested-action {
     color: #eeeeec;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(33, 93, 156, 0.5));
+    background-image: linear-gradient(to bottom, rgba(33, 93, 156, 0.5), rgba(33, 93, 156, 0.5));
     background-clip: padding-box;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
     text-shadow: 0 1px black;
@@ -903,7 +903,7 @@ button.suggested-action {
     button.suggested-action:hover {
       color: white;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(33, 93, 156, 0.7));
+      background-image: linear-gradient(to bottom, rgba(33, 93, 156, 0.7), rgba(33, 93, 156, 0.7));
       background-clip: padding-box;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
       text-shadow: 0 1px black;
@@ -916,7 +916,7 @@ button.suggested-action {
     button.suggested-action:checked {
       color: white;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, #215d9c);
+      background-image: linear-gradient(to bottom, #215d9c, #215d9c);
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -927,7 +927,7 @@ button.suggested-action {
     button.suggested-action:disabled {
       color: #878a89;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5));
+      background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5), rgba(53, 57, 58, 0.5));
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -936,7 +936,7 @@ button.suggested-action {
     button.suggested-action:backdrop {
       color: #eeeeec;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(33, 93, 156, 0.5));
+      background-image: linear-gradient(to bottom, rgba(33, 93, 156, 0.5), rgba(33, 93, 156, 0.5));
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -972,14 +972,14 @@ button.destructive-action {
     color: white;
     outline-color: rgba(255, 255, 255, 0.3);
     border-color: #760909;
-    background-image: linear-gradient(to bottom, #b90e0e);
+    background-image: linear-gradient(to bottom, #b90e0e, #b90e0e);
     box-shadow: inset 0 1px rgba(255, 255, 255, 0);
     text-shadow: none;
     -gtk-icon-shadow: none; }
   button.destructive-action:backdrop,
   button.destructive-action.flat:backdrop {
     border-color: #760909;
-    background-image: linear-gradient(to bottom, #d51010);
+    background-image: linear-gradient(to bottom, #d51010, #d51010);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -993,7 +993,7 @@ button.destructive-action {
     button.destructive-action.flat:backdrop:active,
     button.destructive-action.flat:backdrop:checked {
       border-color: #760909;
-      background-image: linear-gradient(to bottom, #a60c0c);
+      background-image: linear-gradient(to bottom, #a60c0c, #a60c0c);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
       button.destructive-action:backdrop:active label,
       button.destructive-action:backdrop:active,
@@ -1007,7 +1007,7 @@ button.destructive-action {
     button.destructive-action:backdrop:disabled,
     button.destructive-action.flat:backdrop:disabled {
       border-color: #262929;
-      background-image: linear-gradient(to bottom, #333636);
+      background-image: linear-gradient(to bottom, #333636, #333636);
       text-shadow: none;
       -gtk-icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -1021,7 +1021,7 @@ button.destructive-action {
       button.destructive-action.flat:backdrop:disabled:active,
       button.destructive-action.flat:backdrop:disabled:checked {
         border-color: #760909;
-        background-image: linear-gradient(to bottom, #a41212);
+        background-image: linear-gradient(to bottom, #a41212, #a41212);
         box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
         button.destructive-action:backdrop:disabled:active label,
         button.destructive-action:backdrop:disabled:checked label,
@@ -1040,7 +1040,7 @@ button.destructive-action {
     color: rgba(213, 16, 16, 0.8); }
   button.destructive-action:disabled {
     border-color: #212424;
-    background-image: linear-gradient(to bottom, #333636);
+    background-image: linear-gradient(to bottom, #333636, #333636);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -1061,7 +1061,7 @@ button.destructive-action {
   button.destructive-action {
     color: #eeeeec;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(213, 16, 16, 0.5));
+    background-image: linear-gradient(to bottom, rgba(213, 16, 16, 0.5), rgba(213, 16, 16, 0.5));
     background-clip: padding-box;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
     text-shadow: 0 1px black;
@@ -1071,7 +1071,7 @@ button.destructive-action {
     button.destructive-action:hover {
       color: white;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(213, 16, 16, 0.7));
+      background-image: linear-gradient(to bottom, rgba(213, 16, 16, 0.7), rgba(213, 16, 16, 0.7));
       background-clip: padding-box;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
       text-shadow: 0 1px black;
@@ -1084,7 +1084,7 @@ button.destructive-action {
     button.destructive-action:checked {
       color: white;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, #d51010);
+      background-image: linear-gradient(to bottom, #d51010, #d51010);
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -1095,7 +1095,7 @@ button.destructive-action {
     button.destructive-action:disabled {
       color: #878a89;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5));
+      background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5), rgba(53, 57, 58, 0.5));
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -1104,7 +1104,7 @@ button.destructive-action {
     button.destructive-action:backdrop {
       color: #eeeeec;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(213, 16, 16, 0.5));
+      background-image: linear-gradient(to bottom, rgba(213, 16, 16, 0.5), rgba(213, 16, 16, 0.5));
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -1190,13 +1190,13 @@ button.needs-attention > image, stacksidebar row.needs-attention > label {
     color: #eeeeec;
     outline-color: rgba(238, 238, 236, 0.3);
     border-color: #212424;
-    background-image: linear-gradient(to bottom, #2a2f2f);
+    background-image: linear-gradient(to bottom, #2a2f2f, #2a2f2f);
     box-shadow: inset 0 1px rgba(255, 255, 255, 0);
     text-shadow: none;
     -gtk-icon-shadow: none; }
   .inline-toolbar toolbutton > button:disabled {
     border-color: #212424;
-    background-image: linear-gradient(to bottom, #333636);
+    background-image: linear-gradient(to bottom, #333636, #333636);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -1210,7 +1210,7 @@ button.needs-attention > image, stacksidebar row.needs-attention > label {
         color: #949796; }
   .inline-toolbar toolbutton > button:backdrop {
     border-color: #262929;
-    background-image: linear-gradient(to bottom, #393f3f);
+    background-image: linear-gradient(to bottom, #393f3f, #393f3f);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -1218,13 +1218,13 @@ button.needs-attention > image, stacksidebar row.needs-attention > label {
       color: #949796; }
     .inline-toolbar toolbutton > button:backdrop:active, .inline-toolbar toolbutton > 
button:backdrop:checked {
       border-color: #262929;
-      background-image: linear-gradient(to bottom, #323737);
+      background-image: linear-gradient(to bottom, #323737, #323737);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
       .inline-toolbar toolbutton > button:backdrop:active label, .inline-toolbar toolbutton > 
button:backdrop:active, .inline-toolbar toolbutton > button:backdrop:checked label, .inline-toolbar 
toolbutton > button:backdrop:checked {
         color: #949796; }
     .inline-toolbar toolbutton > button:backdrop:disabled {
       border-color: #262929;
-      background-image: linear-gradient(to bottom, #333636);
+      background-image: linear-gradient(to bottom, #333636, #333636);
       text-shadow: none;
       -gtk-icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -1232,7 +1232,7 @@ button.needs-attention > image, stacksidebar row.needs-attention > label {
         color: #5d6767; }
       .inline-toolbar toolbutton > button:backdrop:disabled:active, .inline-toolbar toolbutton > 
button:backdrop:disabled:checked {
         border-color: #262929;
-        background-image: linear-gradient(to bottom, #272929);
+        background-image: linear-gradient(to bottom, #272929, #272929);
         box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
         .inline-toolbar toolbutton > button:backdrop:disabled:active label, .inline-toolbar toolbutton > 
button:backdrop:disabled:checked label {
           color: #5d6767; }
@@ -1547,7 +1547,7 @@ spinbutton.vertical button.down {
 .osd spinbutton.vertical button:first-child {
   color: #eeeeec;
   border-color: rgba(0, 0, 0, 0.7);
-  background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+  background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
   background-clip: padding-box;
   box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
   text-shadow: 0 1px black;
@@ -1556,7 +1556,7 @@ spinbutton.vertical button.down {
   .osd spinbutton.vertical button:first-child:hover {
     color: white;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(60, 69, 71, 0.8));
+    background-image: linear-gradient(to bottom, rgba(60, 69, 71, 0.8), rgba(60, 69, 71, 0.8));
     background-clip: padding-box;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
     text-shadow: 0 1px black;
@@ -1565,7 +1565,7 @@ spinbutton.vertical button.down {
   .osd spinbutton.vertical button:first-child:active {
     color: white;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7));
+    background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7));
     background-clip: padding-box;
     box-shadow: none;
     text-shadow: none;
@@ -1574,7 +1574,7 @@ spinbutton.vertical button.down {
   .osd spinbutton.vertical button:first-child:disabled {
     color: #878a89;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5));
+    background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5), rgba(53, 57, 58, 0.5));
     background-clip: padding-box;
     box-shadow: none;
     text-shadow: none;
@@ -1582,7 +1582,7 @@ spinbutton.vertical button.down {
   .osd spinbutton.vertical button:first-child:backdrop {
     color: #eeeeec;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+    background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
     background-clip: padding-box;
     box-shadow: none;
     text-shadow: none;
@@ -1737,7 +1737,7 @@ headerbar {
         color: #ffffff;
         outline-color: rgba(255, 255, 255, 0.3);
         border-color: #0f2b48;
-        background-image: linear-gradient(to bottom, #1b4e83);
+        background-image: linear-gradient(to bottom, #1b4e83, #1b4e83);
         box-shadow: inset 0 1px rgba(255, 255, 255, 0);
         text-shadow: none;
         -gtk-icon-shadow: none; }
@@ -1745,7 +1745,7 @@ headerbar {
       headerbar.selection-mode button:backdrop.flat,
       headerbar.selection-mode button:backdrop {
         border-color: #0f2b48;
-        background-image: linear-gradient(to bottom, #215d9c);
+        background-image: linear-gradient(to bottom, #215d9c, #215d9c);
         text-shadow: none;
         -gtk-icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0);
@@ -1763,7 +1763,7 @@ headerbar {
         headerbar.selection-mode button:backdrop:active,
         headerbar.selection-mode button:backdrop:checked {
           border-color: #0f2b48;
-          background-image: linear-gradient(to bottom, #184472);
+          background-image: linear-gradient(to bottom, #184472, #184472);
           box-shadow: inset 0 1px rgba(255, 255, 255, 0);
           border-color: #0f2b48; }
           .selection-mode.titlebar:not(headerbar) button:backdrop.flat:active label, 
.selection-mode.titlebar:not(headerbar) button:backdrop.flat:active, .selection-mode.titlebar:not(headerbar) 
button:backdrop.flat:checked label, .selection-mode.titlebar:not(headerbar) button:backdrop.flat:checked, 
.selection-mode.titlebar:not(headerbar) button:backdrop:active label, .selection-mode.titlebar:not(headerbar) 
button:backdrop:active, .selection-mode.titlebar:not(headerbar) button:backdrop:checked label, 
.selection-mode.titlebar:not(headerbar) button:backdrop:checked,
@@ -1780,7 +1780,7 @@ headerbar {
         headerbar.selection-mode button:backdrop.flat:disabled,
         headerbar.selection-mode button:backdrop:disabled {
           border-color: #0f2b48;
-          background-image: linear-gradient(to bottom, #22558b);
+          background-image: linear-gradient(to bottom, #22558b, #22558b);
           text-shadow: none;
           -gtk-icon-shadow: none;
           box-shadow: inset 0 1px rgba(255, 255, 255, 0);
@@ -1797,7 +1797,7 @@ headerbar {
           headerbar.selection-mode button:backdrop:disabled:active,
           headerbar.selection-mode button:backdrop:disabled:checked {
             border-color: #0f2b48;
-            background-image: linear-gradient(to bottom, #1d4877);
+            background-image: linear-gradient(to bottom, #1d4877, #1d4877);
             box-shadow: inset 0 1px rgba(255, 255, 255, 0);
             border-color: #0f2b48; }
             .selection-mode.titlebar:not(headerbar) button:backdrop.flat:disabled:active label, 
.selection-mode.titlebar:not(headerbar) button:backdrop.flat:disabled:checked label, 
.selection-mode.titlebar:not(headerbar) button:backdrop:disabled:active label, 
.selection-mode.titlebar:not(headerbar) button:backdrop:disabled:checked label,
@@ -1819,7 +1819,7 @@ headerbar {
       .selection-mode.titlebar:not(headerbar) button:disabled,
       headerbar.selection-mode button:disabled {
         border-color: #0f2b48;
-        background-image: linear-gradient(to bottom, #22558b);
+        background-image: linear-gradient(to bottom, #22558b, #22558b);
         text-shadow: none;
         -gtk-icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -1866,7 +1866,7 @@ headerbar {
           color: #eeeeec;
           outline-color: rgba(238, 238, 236, 0.3);
           border-color: #212424;
-          background-image: linear-gradient(to bottom, #2a2f2f);
+          background-image: linear-gradient(to bottom, #2a2f2f, #2a2f2f);
           box-shadow: inset 0 1px rgba(255, 255, 255, 0);
           text-shadow: none;
           -gtk-icon-shadow: none;
@@ -1874,7 +1874,7 @@ headerbar {
         .selection-mode.titlebar:not(headerbar) button.suggested-action:disabled,
         headerbar.selection-mode button.suggested-action:disabled {
           border-color: #212424;
-          background-image: linear-gradient(to bottom, #333636);
+          background-image: linear-gradient(to bottom, #333636, #333636);
           text-shadow: none;
           -gtk-icon-shadow: none;
           box-shadow: inset 0 1px rgba(255, 255, 255, 0);
@@ -1886,7 +1886,7 @@ headerbar {
         .selection-mode.titlebar:not(headerbar) button.suggested-action:backdrop,
         headerbar.selection-mode button.suggested-action:backdrop {
           border-color: #262929;
-          background-image: linear-gradient(to bottom, #393f3f);
+          background-image: linear-gradient(to bottom, #393f3f, #393f3f);
           text-shadow: none;
           -gtk-icon-shadow: none;
           box-shadow: inset 0 1px rgba(255, 255, 255, 0);
@@ -1898,7 +1898,7 @@ headerbar {
         .selection-mode.titlebar:not(headerbar) button.suggested-action:backdrop:disabled,
         headerbar.selection-mode button.suggested-action:backdrop:disabled {
           border-color: #262929;
-          background-image: linear-gradient(to bottom, #333636);
+          background-image: linear-gradient(to bottom, #333636, #333636);
           text-shadow: none;
           -gtk-icon-shadow: none;
           box-shadow: inset 0 1px rgba(255, 255, 255, 0);
@@ -1911,7 +1911,7 @@ headerbar {
     headerbar.selection-mode .selection-menu:backdrop,
     headerbar.selection-mode .selection-menu {
       border-color: rgba(33, 93, 156, 0);
-      background-image: linear-gradient(to bottom, rgba(33, 93, 156, 0));
+      background-image: linear-gradient(to bottom, rgba(33, 93, 156, 0), rgba(33, 93, 156, 0));
       box-shadow: none;
       padding-left: 10px;
       padding-right: 10px; }
@@ -2659,7 +2659,7 @@ switch {
     border: 1px solid #0f2b48; }
   switch:disabled slider {
     border-color: #212424;
-    background-image: linear-gradient(to bottom, #333636);
+    background-image: linear-gradient(to bottom, #333636, #333636);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -2668,7 +2668,7 @@ switch {
   switch:backdrop slider {
     transition: 200ms ease-out;
     border-color: #262929;
-    background-image: linear-gradient(to bottom, #393f3f);
+    background-image: linear-gradient(to bottom, #393f3f, #393f3f);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -2678,7 +2678,7 @@ switch {
     border-color: #0f2b48; }
   switch:backdrop:disabled slider {
     border-color: #262929;
-    background-image: linear-gradient(to bottom, #333636);
+    background-image: linear-gradient(to bottom, #333636, #333636);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -2765,14 +2765,14 @@ radio {
     color: #eeeeec;
     outline-color: rgba(238, 238, 236, 0.3);
     border-color: #212424;
-    background-image: linear-gradient(to bottom, #2a2f2f);
+    background-image: linear-gradient(to bottom, #2a2f2f, #2a2f2f);
     box-shadow: inset 0 1px rgba(255, 255, 255, 0);
     text-shadow: none;
     -gtk-icon-shadow: none; }
   check:disabled,
   radio:disabled {
     border-color: #212424;
-    background-image: linear-gradient(to bottom, #333636);
+    background-image: linear-gradient(to bottom, #333636, #333636);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -2783,7 +2783,7 @@ radio {
   check:backdrop,
   radio:backdrop {
     border-color: #262929;
-    background-image: linear-gradient(to bottom, #393f3f);
+    background-image: linear-gradient(to bottom, #393f3f, #393f3f);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0);
@@ -2795,7 +2795,7 @@ radio {
     check:backdrop:disabled,
     radio:backdrop:disabled {
       border-color: #262929;
-      background-image: linear-gradient(to bottom, #333636);
+      background-image: linear-gradient(to bottom, #333636, #333636);
       text-shadow: none;
       -gtk-icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -2807,7 +2807,7 @@ radio {
   radio {
     color: #eeeeec;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+    background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
     background-clip: padding-box;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
     text-shadow: 0 1px black;
@@ -2817,7 +2817,7 @@ radio {
     radio:hover {
       color: #eeeeec;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+      background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
       background-clip: padding-box;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
       text-shadow: 0 1px black;
@@ -2827,7 +2827,7 @@ radio {
     radio:active {
       color: white;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7));
+      background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7));
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -2837,7 +2837,7 @@ radio {
     radio:backdrop {
       color: #eeeeec;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+      background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -2846,7 +2846,7 @@ radio {
     radio:disabled {
       color: #878a89;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5));
+      background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5), rgba(53, 57, 58, 0.5));
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -3034,7 +3034,7 @@ scale {
       border-color: #0f2b48; }
     scale slider:disabled {
       border-color: #212424;
-      background-image: linear-gradient(to bottom, #333636);
+      background-image: linear-gradient(to bottom, #333636, #333636);
       text-shadow: none;
       -gtk-icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -3043,7 +3043,7 @@ scale {
     scale slider:backdrop {
       transition: 200ms ease-out;
       border-color: #262929;
-      background-image: linear-gradient(to bottom, #393f3f);
+      background-image: linear-gradient(to bottom, #393f3f, #393f3f);
       text-shadow: none;
       -gtk-icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -3051,7 +3051,7 @@ scale {
         color: #949796; }
       scale slider:backdrop:disabled {
         border-color: #262929;
-        background-image: linear-gradient(to bottom, #333636);
+        background-image: linear-gradient(to bottom, #333636, #333636);
         text-shadow: none;
         -gtk-icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -3062,7 +3062,7 @@ scale {
     .osd scale slider {
       color: #eeeeec;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+      background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
       background-clip: padding-box;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
       text-shadow: 0 1px black;
@@ -3073,7 +3073,7 @@ scale {
       .osd scale slider:hover {
         color: white;
         border-color: rgba(0, 0, 0, 0.7);
-        background-image: linear-gradient(to bottom, rgba(60, 69, 71, 0.8));
+        background-image: linear-gradient(to bottom, rgba(60, 69, 71, 0.8), rgba(60, 69, 71, 0.8));
         background-clip: padding-box;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
         text-shadow: 0 1px black;
@@ -3082,7 +3082,7 @@ scale {
       .osd scale slider:active {
         color: white;
         border-color: rgba(0, 0, 0, 0.7);
-        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7));
+        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7));
         background-clip: padding-box;
         box-shadow: none;
         text-shadow: none;
@@ -3091,7 +3091,7 @@ scale {
       .osd scale slider:disabled {
         color: #878a89;
         border-color: rgba(0, 0, 0, 0.7);
-        background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5));
+        background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5), rgba(53, 57, 58, 0.5));
         background-clip: padding-box;
         box-shadow: none;
         text-shadow: none;
@@ -3099,7 +3099,7 @@ scale {
       .osd scale slider:backdrop {
         color: #eeeeec;
         border-color: rgba(0, 0, 0, 0.7);
-        background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+        background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
         background-clip: padding-box;
         box-shadow: none;
         text-shadow: none;
@@ -3500,7 +3500,7 @@ scale {
     min-height: 0;
     min-width: 0; }
     scale.color trough {
-      background-image: linear-gradient(to bottom, #212424);
+      background-image: linear-gradient(to bottom, #212424, #212424);
       background-repeat: no-repeat; }
     scale.color.horizontal {
       padding: 0 0 15px 0; }
@@ -4030,7 +4030,7 @@ placessidebar row {
   placessidebar row.sidebar-placeholder-row {
     padding: 0 8px;
     min-height: 2px;
-    background-image: linear-gradient(to bottom, #4e9a06);
+    background-image: linear-gradient(to bottom, #4e9a06, #4e9a06);
     background-clip: content-box; }
   placessidebar row.sidebar-new-bookmark-row {
     color: #215d9c; }
@@ -4062,21 +4062,21 @@ paned > separator {
   -gtk-icon-source: none;
   border-style: none;
   background-color: transparent;
-  background-image: linear-gradient(to bottom, #212424);
+  background-image: linear-gradient(to bottom, #212424, #212424);
   background-size: 1px 1px; }
   paned > separator:selected {
-    background-image: linear-gradient(to bottom, #215d9c); }
+    background-image: linear-gradient(to bottom, #215d9c, #215d9c); }
   paned > separator:backdrop {
-    background-image: linear-gradient(to bottom, #262929); }
+    background-image: linear-gradient(to bottom, #262929, #262929); }
   paned > separator.wide {
     min-width: 5px;
     min-height: 5px;
     background-color: #393f3f;
-    background-image: linear-gradient(to bottom, #212424), linear-gradient(to bottom, #212424);
+    background-image: linear-gradient(to bottom, #212424, #212424), linear-gradient(to bottom, #212424, 
#212424);
     background-size: 1px 1px, 1px 1px; }
     paned > separator.wide:backdrop {
       background-color: #393f3f;
-      background-image: linear-gradient(to bottom, #262929), linear-gradient(to bottom, #262929); }
+      background-image: linear-gradient(to bottom, #262929, #262929), linear-gradient(to bottom, #262929, 
#262929); }
 paned.horizontal > separator {
   background-repeat: repeat-y; }
   paned.horizontal > separator:dir(ltr) {
@@ -4151,7 +4151,7 @@ infobar {
       color: #ffffff;
       outline-color: rgba(255, 255, 255, 0.3);
       border-color: #0f2b48;
-      background-image: linear-gradient(to bottom, #1b4e83);
+      background-image: linear-gradient(to bottom, #1b4e83, #1b4e83);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0);
       text-shadow: none;
       -gtk-icon-shadow: none; }
@@ -4160,7 +4160,7 @@ infobar {
     .warning button:disabled,
     .error button:disabled {
       border-color: #0f2b48;
-      background-image: linear-gradient(to bottom, #22558b);
+      background-image: linear-gradient(to bottom, #22558b, #22558b);
       text-shadow: none;
       -gtk-icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -4177,7 +4177,7 @@ infobar {
     .warning button:backdrop,
     .error button:backdrop {
       border-color: #0f2b48;
-      background-image: linear-gradient(to bottom, #215d9c);
+      background-image: linear-gradient(to bottom, #215d9c, #215d9c);
       text-shadow: none;
       -gtk-icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0);
@@ -4195,7 +4195,7 @@ infobar {
       .warning button:backdrop:disabled,
       .error button:backdrop:disabled {
         border-color: #0f2b48;
-        background-image: linear-gradient(to bottom, #22558b);
+        background-image: linear-gradient(to bottom, #22558b, #22558b);
         text-shadow: none;
         -gtk-icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0);
@@ -4320,7 +4320,7 @@ colorswatch#add-color-button {
       box-shadow: inset 0 1px rgba(255, 255, 255, 0.05); }
     colorswatch#add-color-button overlay:backdrop {
       border-color: #262929;
-      background-image: linear-gradient(to bottom, #393f3f);
+      background-image: linear-gradient(to bottom, #393f3f, #393f3f);
       text-shadow: none;
       -gtk-icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
diff --git a/gtk/theme/Adwaita/gtk-contained.css b/gtk/theme/Adwaita/gtk-contained.css
index 2979e6f..5a7fce5 100644
--- a/gtk/theme/Adwaita/gtk-contained.css
+++ b/gtk/theme/Adwaita/gtk-contained.css
@@ -77,7 +77,7 @@ textview text {
 
 textview border {
   background-color: #f4f4f3;
-  background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.2));
+  background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.2));
   background-repeat: no-repeat; }
   textview border:backdrop {
     background-color: #f2f2f2; }
@@ -469,7 +469,7 @@ button {
     color: #2e3436;
     outline-color: rgba(46, 52, 54, 0.3);
     border-color: #b6b6b3;
-    background-image: linear-gradient(to bottom, #d4d4d2);
+    background-image: linear-gradient(to bottom, #d4d4d2, #d4d4d2);
     box-shadow: inset 0 1px rgba(255, 255, 255, 0);
     text-shadow: none;
     -gtk-icon-shadow: none;
@@ -478,7 +478,7 @@ button {
   button:backdrop.flat,
   button:backdrop {
     border-color: #c0c0bd;
-    background-image: linear-gradient(to bottom, #e8e8e7);
+    background-image: linear-gradient(to bottom, #e8e8e7, #e8e8e7);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0);
@@ -496,7 +496,7 @@ button {
     button:backdrop:active,
     button:backdrop:checked {
       border-color: #c0c0bd;
-      background-image: linear-gradient(to bottom, #dadad8);
+      background-image: linear-gradient(to bottom, #dadad8, #dadad8);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
       notebook > header > tabs > arrow:backdrop:active label, button.sidebar-button:backdrop:active label, 
button.titlebutton:backdrop:active label, notebook > header > tabs > arrow:backdrop:active, 
button.sidebar-button:backdrop:active, button.titlebutton:backdrop:active, notebook > header > tabs > 
arrow:backdrop:checked label, button.sidebar-button:backdrop:checked label, 
button.titlebutton:backdrop:checked label, notebook > header > tabs > arrow:backdrop:checked, 
button.sidebar-button:backdrop:checked, button.titlebutton:backdrop:checked, notebook > header > tabs > 
arrow:backdrop:active label, button.titlebutton:backdrop:active label, notebook > header > tabs > 
arrow:backdrop:active, button.titlebutton:backdrop:active, notebook > header > tabs > arrow:backdrop:checked 
label, button.titlebutton:backdrop:checked label, notebook > header > tabs > arrow:backdrop:checked, 
button.titlebutton:backdrop:checked,
       button:backdrop.flat:active label,
@@ -512,7 +512,7 @@ button {
     button:backdrop.flat:disabled,
     button:backdrop:disabled {
       border-color: #c0c0bd;
-      background-image: linear-gradient(to bottom, #f1f1f1);
+      background-image: linear-gradient(to bottom, #f1f1f1, #f1f1f1);
       text-shadow: none;
       -gtk-icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -528,7 +528,7 @@ button {
       button:backdrop:disabled:active,
       button:backdrop:disabled:checked {
         border-color: #c0c0bd;
-        background-image: linear-gradient(to bottom, #e4e4e4);
+        background-image: linear-gradient(to bottom, #e4e4e4, #e4e4e4);
         box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
         notebook > header > tabs > arrow:backdrop:disabled:active label, 
button.sidebar-button:backdrop:disabled:active label, button.titlebutton:backdrop:disabled:active label, 
notebook > header > tabs > arrow:backdrop:disabled:checked label, 
button.sidebar-button:backdrop:disabled:checked label, button.titlebutton:backdrop:disabled:checked label, 
notebook > header > tabs > arrow:backdrop:disabled:active label, button.titlebutton:backdrop:disabled:active 
label, notebook > header > tabs > arrow:backdrop:disabled:checked label, 
button.titlebutton:backdrop:disabled:checked label,
         button:backdrop.flat:disabled:active label,
@@ -549,7 +549,7 @@ button {
   notebook > header > tabs > arrow:disabled, button.titlebutton:disabled,
   button:disabled {
     border-color: #b6b6b3;
-    background-image: linear-gradient(to bottom, #f1f1f1);
+    background-image: linear-gradient(to bottom, #f1f1f1, #f1f1f1);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -609,7 +609,7 @@ button.osd {
   outline-color: rgba(238, 238, 236, 0.3);
   color: #eeeeec;
   border-color: rgba(0, 0, 0, 0.7);
-  background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+  background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
   background-clip: padding-box;
   box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
   text-shadow: 0 1px black;
@@ -622,7 +622,7 @@ button.osd {
   button.osd:hover {
     color: white;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(60, 69, 71, 0.8));
+    background-image: linear-gradient(to bottom, rgba(60, 69, 71, 0.8), rgba(60, 69, 71, 0.8));
     background-clip: padding-box;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
     text-shadow: 0 1px black;
@@ -634,7 +634,7 @@ button.osd {
   button.osd:checked {
     color: white;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7));
+    background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7));
     background-clip: padding-box;
     box-shadow: none;
     text-shadow: none;
@@ -646,7 +646,7 @@ button.osd {
   button.osd:disabled {
     color: #878a89;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5));
+    background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5), rgba(53, 57, 58, 0.5));
     background-clip: padding-box;
     box-shadow: none;
     text-shadow: none;
@@ -655,7 +655,7 @@ button.osd {
   button.osd:backdrop {
     color: #eeeeec;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+    background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
     background-clip: padding-box;
     box-shadow: none;
     text-shadow: none;
@@ -666,7 +666,7 @@ button.osd {
 button {
   color: #eeeeec;
   border-color: rgba(0, 0, 0, 0.7);
-  background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+  background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
   background-clip: padding-box;
   box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
   text-shadow: 0 1px black;
@@ -676,7 +676,7 @@ button {
   button:hover {
     color: white;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(60, 69, 71, 0.8));
+    background-image: linear-gradient(to bottom, rgba(60, 69, 71, 0.8), rgba(60, 69, 71, 0.8));
     background-clip: padding-box;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
     text-shadow: 0 1px black;
@@ -689,7 +689,7 @@ button {
   button:checked {
     color: white;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7));
+    background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7));
     background-clip: padding-box;
     box-shadow: none;
     text-shadow: none;
@@ -700,7 +700,7 @@ button {
   button:disabled {
     color: #878a89;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5));
+    background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5), rgba(53, 57, 58, 0.5));
     background-clip: padding-box;
     box-shadow: none;
     text-shadow: none;
@@ -709,7 +709,7 @@ button {
   button:backdrop {
     color: #eeeeec;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+    background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
     background-clip: padding-box;
     box-shadow: none;
     text-shadow: none;
@@ -729,7 +729,7 @@ button {
     button.flat:hover {
       color: white;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(60, 69, 71, 0.8));
+      background-image: linear-gradient(to bottom, rgba(60, 69, 71, 0.8), rgba(60, 69, 71, 0.8));
       background-clip: padding-box;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
       text-shadow: 0 1px black;
@@ -739,7 +739,7 @@ button {
     button.flat:disabled {
       color: #878a89;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5));
+      background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5), rgba(53, 57, 58, 0.5));
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -760,7 +760,7 @@ button {
     button.flat:checked {
       color: white;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7));
+      background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7));
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -798,7 +798,7 @@ button.suggested-action {
     color: white;
     outline-color: rgba(255, 255, 255, 0.3);
     border-color: #215d9c;
-    background-image: linear-gradient(to bottom, #2b7bcf);
+    background-image: linear-gradient(to bottom, #2b7bcf, #2b7bcf);
     box-shadow: inset 0 1px rgba(255, 255, 255, 0);
     text-shadow: none;
     -gtk-icon-shadow: none; }
@@ -806,7 +806,7 @@ button.suggested-action {
   button.suggested-action:backdrop,
   button.suggested-action.flat:backdrop {
     border-color: #4a90d9;
-    background-image: linear-gradient(to bottom, #4a90d9);
+    background-image: linear-gradient(to bottom, #4a90d9, #4a90d9);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -822,7 +822,7 @@ button.suggested-action {
     button.suggested-action.flat:backdrop:active,
     button.suggested-action.flat:backdrop:checked {
       border-color: #2a76c6;
-      background-image: linear-gradient(to bottom, #2a76c6);
+      background-image: linear-gradient(to bottom, #2a76c6, #2a76c6);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
       .selection-mode button.titlebutton:backdrop:active label, .selection-mode 
button.titlebutton:backdrop:active, .selection-mode button.titlebutton:backdrop:checked label, 
.selection-mode button.titlebutton:backdrop:checked,
       button.suggested-action:backdrop:active label,
@@ -838,7 +838,7 @@ button.suggested-action {
     button.suggested-action:backdrop:disabled,
     button.suggested-action.flat:backdrop:disabled {
       border-color: #c0c0bd;
-      background-image: linear-gradient(to bottom, #f1f1f1);
+      background-image: linear-gradient(to bottom, #f1f1f1, #f1f1f1);
       text-shadow: none;
       -gtk-icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -854,7 +854,7 @@ button.suggested-action {
       button.suggested-action.flat:backdrop:disabled:active,
       button.suggested-action.flat:backdrop:disabled:checked {
         border-color: #5094db;
-        background-image: linear-gradient(to bottom, #5094db);
+        background-image: linear-gradient(to bottom, #5094db, #5094db);
         box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
         .selection-mode button.titlebutton:backdrop:disabled:active label, .selection-mode 
button.titlebutton:backdrop:disabled:checked label,
         button.suggested-action:backdrop:disabled:active label,
@@ -875,7 +875,7 @@ button.suggested-action {
     color: rgba(74, 144, 217, 0.8); }
   button.suggested-action:disabled {
     border-color: #b6b6b3;
-    background-image: linear-gradient(to bottom, #f1f1f1);
+    background-image: linear-gradient(to bottom, #f1f1f1, #f1f1f1);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -896,7 +896,7 @@ button.suggested-action {
   button.suggested-action {
     color: #eeeeec;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(74, 144, 217, 0.5));
+    background-image: linear-gradient(to bottom, rgba(74, 144, 217, 0.5), rgba(74, 144, 217, 0.5));
     background-clip: padding-box;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
     text-shadow: 0 1px black;
@@ -906,7 +906,7 @@ button.suggested-action {
     button.suggested-action:hover {
       color: white;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(74, 144, 217, 0.7));
+      background-image: linear-gradient(to bottom, rgba(74, 144, 217, 0.7), rgba(74, 144, 217, 0.7));
       background-clip: padding-box;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
       text-shadow: 0 1px black;
@@ -919,7 +919,7 @@ button.suggested-action {
     button.suggested-action:checked {
       color: white;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, #4a90d9);
+      background-image: linear-gradient(to bottom, #4a90d9, #4a90d9);
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -930,7 +930,7 @@ button.suggested-action {
     button.suggested-action:disabled {
       color: #878a89;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5));
+      background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5), rgba(53, 57, 58, 0.5));
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -939,7 +939,7 @@ button.suggested-action {
     button.suggested-action:backdrop {
       color: #eeeeec;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(74, 144, 217, 0.5));
+      background-image: linear-gradient(to bottom, rgba(74, 144, 217, 0.5), rgba(74, 144, 217, 0.5));
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -975,14 +975,14 @@ button.destructive-action {
     color: white;
     outline-color: rgba(255, 255, 255, 0.3);
     border-color: #a60c0c;
-    background-image: linear-gradient(to bottom, #df1111);
+    background-image: linear-gradient(to bottom, #df1111, #df1111);
     box-shadow: inset 0 1px rgba(255, 255, 255, 0);
     text-shadow: none;
     -gtk-icon-shadow: none; }
   button.destructive-action:backdrop,
   button.destructive-action.flat:backdrop {
     border-color: #ef2929;
-    background-image: linear-gradient(to bottom, #ef2929);
+    background-image: linear-gradient(to bottom, #ef2929, #ef2929);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -996,7 +996,7 @@ button.destructive-action {
     button.destructive-action.flat:backdrop:active,
     button.destructive-action.flat:backdrop:checked {
       border-color: #d51010;
-      background-image: linear-gradient(to bottom, #d51010);
+      background-image: linear-gradient(to bottom, #d51010, #d51010);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
       button.destructive-action:backdrop:active label,
       button.destructive-action:backdrop:active,
@@ -1010,7 +1010,7 @@ button.destructive-action {
     button.destructive-action:backdrop:disabled,
     button.destructive-action.flat:backdrop:disabled {
       border-color: #c0c0bd;
-      background-image: linear-gradient(to bottom, #f1f1f1);
+      background-image: linear-gradient(to bottom, #f1f1f1, #f1f1f1);
       text-shadow: none;
       -gtk-icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -1024,7 +1024,7 @@ button.destructive-action {
       button.destructive-action.flat:backdrop:disabled:active,
       button.destructive-action.flat:backdrop:disabled:checked {
         border-color: #ef3131;
-        background-image: linear-gradient(to bottom, #ef3131);
+        background-image: linear-gradient(to bottom, #ef3131, #ef3131);
         box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
         button.destructive-action:backdrop:disabled:active label,
         button.destructive-action:backdrop:disabled:checked label,
@@ -1043,7 +1043,7 @@ button.destructive-action {
     color: rgba(239, 41, 41, 0.8); }
   button.destructive-action:disabled {
     border-color: #b6b6b3;
-    background-image: linear-gradient(to bottom, #f1f1f1);
+    background-image: linear-gradient(to bottom, #f1f1f1, #f1f1f1);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -1064,7 +1064,7 @@ button.destructive-action {
   button.destructive-action {
     color: #eeeeec;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(239, 41, 41, 0.5));
+    background-image: linear-gradient(to bottom, rgba(239, 41, 41, 0.5), rgba(239, 41, 41, 0.5));
     background-clip: padding-box;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
     text-shadow: 0 1px black;
@@ -1074,7 +1074,7 @@ button.destructive-action {
     button.destructive-action:hover {
       color: white;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(239, 41, 41, 0.7));
+      background-image: linear-gradient(to bottom, rgba(239, 41, 41, 0.7), rgba(239, 41, 41, 0.7));
       background-clip: padding-box;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
       text-shadow: 0 1px black;
@@ -1087,7 +1087,7 @@ button.destructive-action {
     button.destructive-action:checked {
       color: white;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, #ef2929);
+      background-image: linear-gradient(to bottom, #ef2929, #ef2929);
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -1098,7 +1098,7 @@ button.destructive-action {
     button.destructive-action:disabled {
       color: #878a89;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5));
+      background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5), rgba(53, 57, 58, 0.5));
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -1107,7 +1107,7 @@ button.destructive-action {
     button.destructive-action:backdrop {
       color: #eeeeec;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(239, 41, 41, 0.5));
+      background-image: linear-gradient(to bottom, rgba(239, 41, 41, 0.5), rgba(239, 41, 41, 0.5));
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -1193,13 +1193,13 @@ button.needs-attention > image, stacksidebar row.needs-attention > label {
     color: #2e3436;
     outline-color: rgba(46, 52, 54, 0.3);
     border-color: #b6b6b3;
-    background-image: linear-gradient(to bottom, #d4d4d2);
+    background-image: linear-gradient(to bottom, #d4d4d2, #d4d4d2);
     box-shadow: inset 0 1px rgba(255, 255, 255, 0);
     text-shadow: none;
     -gtk-icon-shadow: none; }
   .inline-toolbar toolbutton > button:disabled {
     border-color: #b6b6b3;
-    background-image: linear-gradient(to bottom, #f1f1f1);
+    background-image: linear-gradient(to bottom, #f1f1f1, #f1f1f1);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -1213,7 +1213,7 @@ button.needs-attention > image, stacksidebar row.needs-attention > label {
         color: #8b8e8f; }
   .inline-toolbar toolbutton > button:backdrop {
     border-color: #c0c0bd;
-    background-image: linear-gradient(to bottom, #e8e8e7);
+    background-image: linear-gradient(to bottom, #e8e8e7, #e8e8e7);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -1221,13 +1221,13 @@ button.needs-attention > image, stacksidebar row.needs-attention > label {
       color: #8b8e8f; }
     .inline-toolbar toolbutton > button:backdrop:active, .inline-toolbar toolbutton > 
button:backdrop:checked {
       border-color: #c0c0bd;
-      background-image: linear-gradient(to bottom, #dadad8);
+      background-image: linear-gradient(to bottom, #dadad8, #dadad8);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
       .inline-toolbar toolbutton > button:backdrop:active label, .inline-toolbar toolbutton > 
button:backdrop:active, .inline-toolbar toolbutton > button:backdrop:checked label, .inline-toolbar 
toolbutton > button:backdrop:checked {
         color: #8b8e8f; }
     .inline-toolbar toolbutton > button:backdrop:disabled {
       border-color: #c0c0bd;
-      background-image: linear-gradient(to bottom, #f1f1f1);
+      background-image: linear-gradient(to bottom, #f1f1f1, #f1f1f1);
       text-shadow: none;
       -gtk-icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -1235,7 +1235,7 @@ button.needs-attention > image, stacksidebar row.needs-attention > label {
         color: #c3c3c0; }
       .inline-toolbar toolbutton > button:backdrop:disabled:active, .inline-toolbar toolbutton > 
button:backdrop:disabled:checked {
         border-color: #c0c0bd;
-        background-image: linear-gradient(to bottom, #e4e4e4);
+        background-image: linear-gradient(to bottom, #e4e4e4, #e4e4e4);
         box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
         .inline-toolbar toolbutton > button:backdrop:disabled:active label, .inline-toolbar toolbutton > 
button:backdrop:disabled:checked label {
           color: #c3c3c0; }
@@ -1554,7 +1554,7 @@ spinbutton.vertical button.down {
 .osd spinbutton.vertical button:first-child {
   color: #eeeeec;
   border-color: rgba(0, 0, 0, 0.7);
-  background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+  background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
   background-clip: padding-box;
   box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
   text-shadow: 0 1px black;
@@ -1563,7 +1563,7 @@ spinbutton.vertical button.down {
   .osd spinbutton.vertical button:first-child:hover {
     color: white;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(60, 69, 71, 0.8));
+    background-image: linear-gradient(to bottom, rgba(60, 69, 71, 0.8), rgba(60, 69, 71, 0.8));
     background-clip: padding-box;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
     text-shadow: 0 1px black;
@@ -1572,7 +1572,7 @@ spinbutton.vertical button.down {
   .osd spinbutton.vertical button:first-child:active {
     color: white;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7));
+    background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7));
     background-clip: padding-box;
     box-shadow: none;
     text-shadow: none;
@@ -1581,7 +1581,7 @@ spinbutton.vertical button.down {
   .osd spinbutton.vertical button:first-child:disabled {
     color: #878a89;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5));
+    background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5), rgba(53, 57, 58, 0.5));
     background-clip: padding-box;
     box-shadow: none;
     text-shadow: none;
@@ -1589,7 +1589,7 @@ spinbutton.vertical button.down {
   .osd spinbutton.vertical button:first-child:backdrop {
     color: #eeeeec;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+    background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
     background-clip: padding-box;
     box-shadow: none;
     text-shadow: none;
@@ -1744,7 +1744,7 @@ headerbar {
         color: #ffffff;
         outline-color: rgba(255, 255, 255, 0.3);
         border-color: #215d9c;
-        background-image: linear-gradient(to bottom, #2b7bcf);
+        background-image: linear-gradient(to bottom, #2b7bcf, #2b7bcf);
         box-shadow: inset 0 1px rgba(255, 255, 255, 0);
         text-shadow: none;
         -gtk-icon-shadow: none; }
@@ -1752,7 +1752,7 @@ headerbar {
       headerbar.selection-mode button:backdrop.flat,
       headerbar.selection-mode button:backdrop {
         border-color: #4a90d9;
-        background-image: linear-gradient(to bottom, #4a90d9);
+        background-image: linear-gradient(to bottom, #4a90d9, #4a90d9);
         text-shadow: none;
         -gtk-icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0);
@@ -1770,7 +1770,7 @@ headerbar {
         headerbar.selection-mode button:backdrop:active,
         headerbar.selection-mode button:backdrop:checked {
           border-color: #2a76c6;
-          background-image: linear-gradient(to bottom, #2a76c6);
+          background-image: linear-gradient(to bottom, #2a76c6, #2a76c6);
           box-shadow: inset 0 1px rgba(255, 255, 255, 0);
           border-color: #184472; }
           .selection-mode.titlebar:not(headerbar) button:backdrop.flat:active label, 
.selection-mode.titlebar:not(headerbar) button:backdrop.flat:active, .selection-mode.titlebar:not(headerbar) 
button:backdrop.flat:checked label, .selection-mode.titlebar:not(headerbar) button:backdrop.flat:checked, 
.selection-mode.titlebar:not(headerbar) button:backdrop:active label, .selection-mode.titlebar:not(headerbar) 
button:backdrop:active, .selection-mode.titlebar:not(headerbar) button:backdrop:checked label, 
.selection-mode.titlebar:not(headerbar) button:backdrop:checked,
@@ -1787,7 +1787,7 @@ headerbar {
         headerbar.selection-mode button:backdrop.flat:disabled,
         headerbar.selection-mode button:backdrop:disabled {
           border-color: #65a1df;
-          background-image: linear-gradient(to bottom, #65a1df);
+          background-image: linear-gradient(to bottom, #65a1df, #65a1df);
           text-shadow: none;
           -gtk-icon-shadow: none;
           box-shadow: inset 0 1px rgba(255, 255, 255, 0);
@@ -1804,7 +1804,7 @@ headerbar {
           headerbar.selection-mode button:backdrop:disabled:active,
           headerbar.selection-mode button:backdrop:disabled:checked {
             border-color: #5094db;
-            background-image: linear-gradient(to bottom, #5094db);
+            background-image: linear-gradient(to bottom, #5094db, #5094db);
             box-shadow: inset 0 1px rgba(255, 255, 255, 0);
             border-color: #184472; }
             .selection-mode.titlebar:not(headerbar) button:backdrop.flat:disabled:active label, 
.selection-mode.titlebar:not(headerbar) button:backdrop.flat:disabled:checked label, 
.selection-mode.titlebar:not(headerbar) button:backdrop:disabled:active label, 
.selection-mode.titlebar:not(headerbar) button:backdrop:disabled:checked label,
@@ -1826,7 +1826,7 @@ headerbar {
       .selection-mode.titlebar:not(headerbar) button:disabled,
       headerbar.selection-mode button:disabled {
         border-color: #215d9c;
-        background-image: linear-gradient(to bottom, #65a1df);
+        background-image: linear-gradient(to bottom, #65a1df, #65a1df);
         text-shadow: none;
         -gtk-icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -1873,7 +1873,7 @@ headerbar {
           color: #2e3436;
           outline-color: rgba(46, 52, 54, 0.3);
           border-color: #b6b6b3;
-          background-image: linear-gradient(to bottom, #d4d4d2);
+          background-image: linear-gradient(to bottom, #d4d4d2, #d4d4d2);
           box-shadow: inset 0 1px rgba(255, 255, 255, 0);
           text-shadow: none;
           -gtk-icon-shadow: none;
@@ -1881,7 +1881,7 @@ headerbar {
         .selection-mode.titlebar:not(headerbar) button.suggested-action:disabled,
         headerbar.selection-mode button.suggested-action:disabled {
           border-color: #b6b6b3;
-          background-image: linear-gradient(to bottom, #f1f1f1);
+          background-image: linear-gradient(to bottom, #f1f1f1, #f1f1f1);
           text-shadow: none;
           -gtk-icon-shadow: none;
           box-shadow: inset 0 1px rgba(255, 255, 255, 0);
@@ -1893,7 +1893,7 @@ headerbar {
         .selection-mode.titlebar:not(headerbar) button.suggested-action:backdrop,
         headerbar.selection-mode button.suggested-action:backdrop {
           border-color: #c0c0bd;
-          background-image: linear-gradient(to bottom, #e8e8e7);
+          background-image: linear-gradient(to bottom, #e8e8e7, #e8e8e7);
           text-shadow: none;
           -gtk-icon-shadow: none;
           box-shadow: inset 0 1px rgba(255, 255, 255, 0);
@@ -1905,7 +1905,7 @@ headerbar {
         .selection-mode.titlebar:not(headerbar) button.suggested-action:backdrop:disabled,
         headerbar.selection-mode button.suggested-action:backdrop:disabled {
           border-color: #c0c0bd;
-          background-image: linear-gradient(to bottom, #f1f1f1);
+          background-image: linear-gradient(to bottom, #f1f1f1, #f1f1f1);
           text-shadow: none;
           -gtk-icon-shadow: none;
           box-shadow: inset 0 1px rgba(255, 255, 255, 0);
@@ -1918,7 +1918,7 @@ headerbar {
     headerbar.selection-mode .selection-menu:backdrop,
     headerbar.selection-mode .selection-menu {
       border-color: rgba(74, 144, 217, 0);
-      background-image: linear-gradient(to bottom, rgba(74, 144, 217, 0));
+      background-image: linear-gradient(to bottom, rgba(74, 144, 217, 0), rgba(74, 144, 217, 0));
       box-shadow: none;
       padding-left: 10px;
       padding-right: 10px; }
@@ -2673,7 +2673,7 @@ switch {
     border: 1px solid #184472; }
   switch:disabled slider {
     border-color: #b6b6b3;
-    background-image: linear-gradient(to bottom, #f1f1f1);
+    background-image: linear-gradient(to bottom, #f1f1f1, #f1f1f1);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -2682,7 +2682,7 @@ switch {
   switch:backdrop slider {
     transition: 200ms ease-out;
     border-color: #c0c0bd;
-    background-image: linear-gradient(to bottom, #e8e8e7);
+    background-image: linear-gradient(to bottom, #e8e8e7, #e8e8e7);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -2692,7 +2692,7 @@ switch {
     border-color: #4a90d9; }
   switch:backdrop:disabled slider {
     border-color: #c0c0bd;
-    background-image: linear-gradient(to bottom, #f1f1f1);
+    background-image: linear-gradient(to bottom, #f1f1f1, #f1f1f1);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -2790,14 +2790,14 @@ radio {
     color: #2e3436;
     outline-color: rgba(46, 52, 54, 0.3);
     border-color: #b6b6b3;
-    background-image: linear-gradient(to bottom, #d4d4d2);
+    background-image: linear-gradient(to bottom, #d4d4d2, #d4d4d2);
     box-shadow: inset 0 1px rgba(255, 255, 255, 0);
     text-shadow: none;
     -gtk-icon-shadow: none; }
   check:disabled,
   radio:disabled {
     border-color: #b6b6b3;
-    background-image: linear-gradient(to bottom, #f1f1f1);
+    background-image: linear-gradient(to bottom, #f1f1f1, #f1f1f1);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -2808,7 +2808,7 @@ radio {
   check:backdrop,
   radio:backdrop {
     border-color: #c0c0bd;
-    background-image: linear-gradient(to bottom, #e8e8e7);
+    background-image: linear-gradient(to bottom, #e8e8e7, #e8e8e7);
     text-shadow: none;
     -gtk-icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0);
@@ -2820,7 +2820,7 @@ radio {
     check:backdrop:disabled,
     radio:backdrop:disabled {
       border-color: #c0c0bd;
-      background-image: linear-gradient(to bottom, #f1f1f1);
+      background-image: linear-gradient(to bottom, #f1f1f1, #f1f1f1);
       text-shadow: none;
       -gtk-icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -2835,7 +2835,7 @@ radio {
   radio {
     color: #eeeeec;
     border-color: rgba(0, 0, 0, 0.7);
-    background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+    background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
     background-clip: padding-box;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
     text-shadow: 0 1px black;
@@ -2845,7 +2845,7 @@ radio {
     radio:hover {
       color: #eeeeec;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+      background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
       background-clip: padding-box;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
       text-shadow: 0 1px black;
@@ -2855,7 +2855,7 @@ radio {
     radio:active {
       color: white;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7));
+      background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7));
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -2865,7 +2865,7 @@ radio {
     radio:backdrop {
       color: #eeeeec;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+      background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -2874,7 +2874,7 @@ radio {
     radio:disabled {
       color: #878a89;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5));
+      background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5), rgba(53, 57, 58, 0.5));
       background-clip: padding-box;
       box-shadow: none;
       text-shadow: none;
@@ -3063,7 +3063,7 @@ scale {
       border-color: #184472; }
     scale slider:disabled {
       border-color: #b6b6b3;
-      background-image: linear-gradient(to bottom, #f1f1f1);
+      background-image: linear-gradient(to bottom, #f1f1f1, #f1f1f1);
       text-shadow: none;
       -gtk-icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -3072,7 +3072,7 @@ scale {
     scale slider:backdrop {
       transition: 200ms ease-out;
       border-color: #c0c0bd;
-      background-image: linear-gradient(to bottom, #e8e8e7);
+      background-image: linear-gradient(to bottom, #e8e8e7, #e8e8e7);
       text-shadow: none;
       -gtk-icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -3080,7 +3080,7 @@ scale {
         color: #8b8e8f; }
       scale slider:backdrop:disabled {
         border-color: #c0c0bd;
-        background-image: linear-gradient(to bottom, #f1f1f1);
+        background-image: linear-gradient(to bottom, #f1f1f1, #f1f1f1);
         text-shadow: none;
         -gtk-icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -3091,7 +3091,7 @@ scale {
     .osd scale slider {
       color: #eeeeec;
       border-color: rgba(0, 0, 0, 0.7);
-      background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+      background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
       background-clip: padding-box;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
       text-shadow: 0 1px black;
@@ -3102,7 +3102,7 @@ scale {
       .osd scale slider:hover {
         color: white;
         border-color: rgba(0, 0, 0, 0.7);
-        background-image: linear-gradient(to bottom, rgba(60, 69, 71, 0.8));
+        background-image: linear-gradient(to bottom, rgba(60, 69, 71, 0.8), rgba(60, 69, 71, 0.8));
         background-clip: padding-box;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0.1);
         text-shadow: 0 1px black;
@@ -3111,7 +3111,7 @@ scale {
       .osd scale slider:active {
         color: white;
         border-color: rgba(0, 0, 0, 0.7);
-        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7));
+        background-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7));
         background-clip: padding-box;
         box-shadow: none;
         text-shadow: none;
@@ -3120,7 +3120,7 @@ scale {
       .osd scale slider:disabled {
         color: #878a89;
         border-color: rgba(0, 0, 0, 0.7);
-        background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5));
+        background-image: linear-gradient(to bottom, rgba(53, 57, 58, 0.5), rgba(53, 57, 58, 0.5));
         background-clip: padding-box;
         box-shadow: none;
         text-shadow: none;
@@ -3128,7 +3128,7 @@ scale {
       .osd scale slider:backdrop {
         color: #eeeeec;
         border-color: rgba(0, 0, 0, 0.7);
-        background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8));
+        background-image: linear-gradient(to bottom, rgba(32, 37, 38, 0.8), rgba(32, 37, 38, 0.8));
         background-clip: padding-box;
         box-shadow: none;
         text-shadow: none;
@@ -3529,7 +3529,7 @@ scale {
     min-height: 0;
     min-width: 0; }
     scale.color trough {
-      background-image: linear-gradient(to bottom, #b6b6b3);
+      background-image: linear-gradient(to bottom, #b6b6b3, #b6b6b3);
       background-repeat: no-repeat; }
     scale.color.horizontal {
       padding: 0 0 15px 0; }
@@ -4059,7 +4059,7 @@ placessidebar row {
   placessidebar row.sidebar-placeholder-row {
     padding: 0 8px;
     min-height: 2px;
-    background-image: linear-gradient(to bottom, #4e9a06);
+    background-image: linear-gradient(to bottom, #4e9a06, #4e9a06);
     background-clip: content-box; }
   placessidebar row.sidebar-new-bookmark-row {
     color: #4a90d9; }
@@ -4091,21 +4091,21 @@ paned > separator {
   -gtk-icon-source: none;
   border-style: none;
   background-color: transparent;
-  background-image: linear-gradient(to bottom, #b6b6b3);
+  background-image: linear-gradient(to bottom, #b6b6b3, #b6b6b3);
   background-size: 1px 1px; }
   paned > separator:selected {
-    background-image: linear-gradient(to bottom, #4a90d9); }
+    background-image: linear-gradient(to bottom, #4a90d9, #4a90d9); }
   paned > separator:backdrop {
-    background-image: linear-gradient(to bottom, #c0c0bd); }
+    background-image: linear-gradient(to bottom, #c0c0bd, #c0c0bd); }
   paned > separator.wide {
     min-width: 5px;
     min-height: 5px;
     background-color: #e8e8e7;
-    background-image: linear-gradient(to bottom, #b6b6b3), linear-gradient(to bottom, #b6b6b3);
+    background-image: linear-gradient(to bottom, #b6b6b3, #b6b6b3), linear-gradient(to bottom, #b6b6b3, 
#b6b6b3);
     background-size: 1px 1px, 1px 1px; }
     paned > separator.wide:backdrop {
       background-color: #e8e8e7;
-      background-image: linear-gradient(to bottom, #c0c0bd), linear-gradient(to bottom, #c0c0bd); }
+      background-image: linear-gradient(to bottom, #c0c0bd, #c0c0bd), linear-gradient(to bottom, #c0c0bd, 
#c0c0bd); }
 paned.horizontal > separator {
   background-repeat: repeat-y; }
   paned.horizontal > separator:dir(ltr) {
@@ -4180,7 +4180,7 @@ infobar {
       color: #ffffff;
       outline-color: rgba(255, 255, 255, 0.3);
       border-color: #215d9c;
-      background-image: linear-gradient(to bottom, #2b7bcf);
+      background-image: linear-gradient(to bottom, #2b7bcf, #2b7bcf);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0);
       text-shadow: none;
       -gtk-icon-shadow: none; }
@@ -4189,7 +4189,7 @@ infobar {
     .warning button:disabled,
     .error button:disabled {
       border-color: #215d9c;
-      background-image: linear-gradient(to bottom, #65a1df);
+      background-image: linear-gradient(to bottom, #65a1df, #65a1df);
       text-shadow: none;
       -gtk-icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
@@ -4206,7 +4206,7 @@ infobar {
     .warning button:backdrop,
     .error button:backdrop {
       border-color: #4a90d9;
-      background-image: linear-gradient(to bottom, #4a90d9);
+      background-image: linear-gradient(to bottom, #4a90d9, #4a90d9);
       text-shadow: none;
       -gtk-icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0);
@@ -4224,7 +4224,7 @@ infobar {
       .warning button:backdrop:disabled,
       .error button:backdrop:disabled {
         border-color: #65a1df;
-        background-image: linear-gradient(to bottom, #65a1df);
+        background-image: linear-gradient(to bottom, #65a1df, #65a1df);
         text-shadow: none;
         -gtk-icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0);
@@ -4349,7 +4349,7 @@ colorswatch#add-color-button {
       box-shadow: inset 0 1px white; }
     colorswatch#add-color-button overlay:backdrop {
       border-color: #c0c0bd;
-      background-image: linear-gradient(to bottom, #e8e8e7);
+      background-image: linear-gradient(to bottom, #e8e8e7, #e8e8e7);
       text-shadow: none;
       -gtk-icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
diff --git a/gtk/theme/HighContrast/_drawing.scss b/gtk/theme/HighContrast/_drawing.scss
index 43b2de1..4113208 100644
--- a/gtk/theme/HighContrast/_drawing.scss
+++ b/gtk/theme/HighContrast/_drawing.scss
@@ -8,7 +8,7 @@
 
 @function _solid($c) {
 // solid color image
-  @return linear-gradient(to bottom, $c);
+  @return linear-gradient(to bottom, $c, $c);
 }
 
 @mixin _shadows($shadow1, $shadow2:none, $shadow3:none, $shadow4:none) {
diff --git a/gtk/theme/HighContrast/gtk-contained-inverse.css 
b/gtk/theme/HighContrast/gtk-contained-inverse.css
index f804156..9be5a90 100644
--- a/gtk/theme/HighContrast/gtk-contained-inverse.css
+++ b/gtk/theme/HighContrast/gtk-contained-inverse.css
@@ -202,7 +202,7 @@ entry {
     background-image: linear-gradient(to bottom, #090909, #111 90%);
     color: gray;
     border-color: gray;
-    background-image: linear-gradient(to bottom, #070707);
+    background-image: linear-gradient(to bottom, #070707, #070707);
     box-shadow: none; }
   spinbutton:backdrop:not(.vertical),
   entry:backdrop {
@@ -210,7 +210,7 @@ entry {
     border-style: solid;
     background-image: linear-gradient(to bottom, #090909, #111 90%);
     color: #fff;
-    background-image: linear-gradient(to bottom, #111);
+    background-image: linear-gradient(to bottom, #111, #111);
     box-shadow: 0 1px rgba(255, 255, 255, 0); }
   spinbutton:backdrop:disabled:not(.vertical),
   entry:backdrop:disabled {
@@ -218,7 +218,7 @@ entry {
     border-style: solid;
     background-image: linear-gradient(to bottom, #090909, #111 90%);
     color: gray;
-    background-image: linear-gradient(to bottom, #000);
+    background-image: linear-gradient(to bottom, #000, #000);
     box-shadow: 0 1px rgba(255, 255, 255, 0); }
   spinbutton.error:not(.vertical),
   entry.error {
@@ -320,12 +320,12 @@ entry {
 entry:not(:disabled) + entry:not(:disabled), .linked.vertical >
 entry:not(:disabled) + spinbutton:not(:disabled):not(.vertical) {
   border-top-color: #323232;
-  background-image: linear-gradient(to bottom, #111); }
+  background-image: linear-gradient(to bottom, #111, #111); }
   .linked.vertical > spinbutton:not(:disabled):not(.vertical) + entry:not(:disabled):backdrop, 
.linked.vertical > spinbutton:not(:disabled):not(.vertical) + 
spinbutton:not(:disabled):backdrop:not(.vertical), .linked.vertical >
   entry:not(:disabled) + entry:not(:disabled):backdrop, .linked.vertical >
   entry:not(:disabled) + spinbutton:not(:disabled):backdrop:not(.vertical) {
     border-top-color: #2e2e2e;
-    background-image: linear-gradient(to bottom, #111); }
+    background-image: linear-gradient(to bottom, #111, #111); }
 .linked.vertical > spinbutton:disabled:not(.vertical) + spinbutton:disabled:not(.vertical), .linked.vertical 
spinbutton:disabled:not(.vertical) + entry:disabled, .linked.vertical >
 entry:disabled + spinbutton:disabled:not(.vertical), .linked.vertical >
 entry:disabled + entry:disabled {
@@ -2548,7 +2548,7 @@ levelbar trough {
     border-style: solid;
     background-image: linear-gradient(to bottom, #090909, #111 90%);
     color: #fff;
-    background-image: linear-gradient(to bottom, #111);
+    background-image: linear-gradient(to bottom, #111, #111);
     box-shadow: 0 1px rgba(255, 255, 255, 0); }
 levelbar block {
   min-width: 32px;
@@ -2871,7 +2871,7 @@ calendar {
     background: linear-gradient(to bottom, #050505, black);
     border-bottom-color: #404040; }
     calendar.header:backdrop {
-      background-image: linear-gradient(to bottom, #000);
+      background-image: linear-gradient(to bottom, #000, #000);
       border-bottom-color: #3a3a3a; }
   calendar:indeterminate, calendar:indeterminate:backdrop {
     color: alpha(currentColor,0.55); }
@@ -3120,9 +3120,9 @@ placesview row.activatable:hover {
 paned separator {
   min-width: 1px;
   min-height: 1px;
-  background-image: linear-gradient(to bottom, gray); }
+  background-image: linear-gradient(to bottom, gray, gray); }
   paned separator:backdrop {
-    background-image: linear-gradient(to bottom, #737373); }
+    background-image: linear-gradient(to bottom, #737373, #737373); }
 paned:dir(ltr).horizontal separator {
   margin: 0 -8px 0 0;
   padding: 0 8px 0 0; }
diff --git a/gtk/theme/HighContrast/gtk-contained.css b/gtk/theme/HighContrast/gtk-contained.css
index fc4af7b..59df69c 100644
--- a/gtk/theme/HighContrast/gtk-contained.css
+++ b/gtk/theme/HighContrast/gtk-contained.css
@@ -202,7 +202,7 @@ entry {
     background-image: linear-gradient(to bottom, #f7f7f7, #fff 90%);
     color: gray;
     border-color: gray;
-    background-image: linear-gradient(to bottom, white);
+    background-image: linear-gradient(to bottom, white, white);
     box-shadow: none; }
   spinbutton:backdrop:not(.vertical),
   entry:backdrop {
@@ -210,7 +210,7 @@ entry {
     border-style: solid;
     background-image: linear-gradient(to bottom, #f7f7f7, #fff 90%);
     color: #000;
-    background-image: linear-gradient(to bottom, #fff);
+    background-image: linear-gradient(to bottom, #fff, #fff);
     box-shadow: 0 1px rgba(255, 255, 255, 0); }
   spinbutton:backdrop:disabled:not(.vertical),
   entry:backdrop:disabled {
@@ -218,7 +218,7 @@ entry {
     border-style: solid;
     background-image: linear-gradient(to bottom, #f7f7f7, #fff 90%);
     color: gray;
-    background-image: linear-gradient(to bottom, #fff);
+    background-image: linear-gradient(to bottom, #fff, #fff);
     box-shadow: 0 1px rgba(255, 255, 255, 0); }
   spinbutton.error:not(.vertical),
   entry.error {
@@ -320,12 +320,12 @@ entry {
 entry:not(:disabled) + entry:not(:disabled), .linked.vertical >
 entry:not(:disabled) + spinbutton:not(:disabled):not(.vertical) {
   border-top-color: #d9d9d9;
-  background-image: linear-gradient(to bottom, #fff); }
+  background-image: linear-gradient(to bottom, #fff, #fff); }
   .linked.vertical > spinbutton:not(:disabled):not(.vertical) + entry:not(:disabled):backdrop, 
.linked.vertical > spinbutton:not(:disabled):not(.vertical) + 
spinbutton:not(:disabled):backdrop:not(.vertical), .linked.vertical >
   entry:not(:disabled) + entry:not(:disabled):backdrop, .linked.vertical >
   entry:not(:disabled) + spinbutton:not(:disabled):backdrop:not(.vertical) {
     border-top-color: #dddddd;
-    background-image: linear-gradient(to bottom, #fff); }
+    background-image: linear-gradient(to bottom, #fff, #fff); }
 .linked.vertical > spinbutton:disabled:not(.vertical) + spinbutton:disabled:not(.vertical), .linked.vertical 
spinbutton:disabled:not(.vertical) + entry:disabled, .linked.vertical >
 entry:disabled + spinbutton:disabled:not(.vertical), .linked.vertical >
 entry:disabled + entry:disabled {
@@ -2555,7 +2555,7 @@ levelbar trough {
     border-style: solid;
     background-image: linear-gradient(to bottom, #f7f7f7, #fff 90%);
     color: #000;
-    background-image: linear-gradient(to bottom, #fff);
+    background-image: linear-gradient(to bottom, #fff, #fff);
     box-shadow: 0 1px rgba(255, 255, 255, 0); }
 levelbar block {
   min-width: 32px;
@@ -2878,7 +2878,7 @@ calendar {
     background: linear-gradient(to bottom, white, #fafafa);
     border-bottom-color: silver; }
     calendar.header:backdrop {
-      background-image: linear-gradient(to bottom, #fff);
+      background-image: linear-gradient(to bottom, #fff, #fff);
       border-bottom-color: #c6c6c6; }
   calendar:indeterminate, calendar:indeterminate:backdrop {
     color: alpha(currentColor,0.55); }
@@ -3127,9 +3127,9 @@ placesview row.activatable:hover {
 paned separator {
   min-width: 1px;
   min-height: 1px;
-  background-image: linear-gradient(to bottom, gray); }
+  background-image: linear-gradient(to bottom, gray, gray); }
   paned separator:backdrop {
-    background-image: linear-gradient(to bottom, #8d8d8d); }
+    background-image: linear-gradient(to bottom, #8d8d8d, #8d8d8d); }
 paned:dir(ltr).horizontal separator {
   margin: 0 -8px 0 0;
   padding: 0 8px 0 0; }



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