diff --git a/common/gtk-3.0/3.14/gtk-contained-dark.css b/common/gtk-3.0/3.14/gtk-contained-dark.css
index cc38c6a..620ea8c 100644
--- a/common/gtk-3.0/3.14/gtk-contained-dark.css
+++ b/common/gtk-3.0/3.14/gtk-contained-dark.css
@@ -3858,16 +3858,39 @@ GtkFileChooserDialog .action-bar.frame GtkComboBox,
 GtkFileChooserDialog .dialog-vbox > .frame GtkLabel, GtkFileChooserDialog .dialog-vbox > .frame GtkComboBox {
   color: #BAC3CF; }
 
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator:backdrop,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd > .titlebar .pane-separator,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator,
+GeditWindow.background.csd > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator:backdrop {
+  background-color: rgba(38, 42, 51, 0.97); }
+
+FeedReaderreaderUI.background.csd > .titlebar,
+GeditWindow.background.csd > .titlebar {
+  background-color: transparent; }
+
+FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: rgba(47, 52, 63, 0.97); }
+  FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: rgba(50, 56, 67, 0.97); }
+
+FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #2f343f; }
+  FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #323843; }
+
 GeditWindow.background.csd {
   background-color: transparent; }
   GeditWindow.background.csd .pane-separator,
   GeditWindow.background.csd .pane-separator:hover {
     background-color: rgba(42, 45, 55, 0.95); }
-  GeditWindow.background.csd .titlebar .pane-separator,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator,
-  GeditWindow.background.csd .titlebar .pane-separator:backdrop,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator:backdrop {
-    background-color: rgba(38, 42, 51, 0.97); }
 
 .gedit-bottom-panel-paned {
   background-color: #404552; }
diff --git a/common/gtk-3.0/3.14/gtk-contained-darker.css b/common/gtk-3.0/3.14/gtk-contained-darker.css
index ae08696..2656569 100644
--- a/common/gtk-3.0/3.14/gtk-contained-darker.css
+++ b/common/gtk-3.0/3.14/gtk-contained-darker.css
@@ -3851,16 +3851,39 @@ GtkFileChooserDialog .action-bar.frame GtkComboBox,
 GtkFileChooserDialog .dialog-vbox > .frame GtkLabel, GtkFileChooserDialog .dialog-vbox > .frame GtkComboBox {
   color: #BAC3CF; }
 
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator:backdrop,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd > .titlebar .pane-separator,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator,
+GeditWindow.background.csd > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator:backdrop {
+  background-color: rgba(38, 42, 51, 0.97); }
+
+FeedReaderreaderUI.background.csd > .titlebar,
+GeditWindow.background.csd > .titlebar {
+  background-color: transparent; }
+
+FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: rgba(47, 52, 63, 0.97); }
+  FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: rgba(50, 56, 67, 0.97); }
+
+FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #2f343f; }
+  FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #323843; }
+
 GeditWindow.background.csd {
   background-color: transparent; }
   GeditWindow.background.csd .pane-separator,
   GeditWindow.background.csd .pane-separator:hover {
     background-color: rgba(53, 57, 69, 0.95); }
-  GeditWindow.background.csd .titlebar .pane-separator,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator,
-  GeditWindow.background.csd .titlebar .pane-separator:backdrop,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator:backdrop {
-    background-color: rgba(38, 42, 51, 0.97); }
 
 .gedit-bottom-panel-paned {
   background-color: #ffffff; }
diff --git a/common/gtk-3.0/3.14/gtk-contained-solid-dark.css b/common/gtk-3.0/3.14/gtk-contained-solid-dark.css
index 3048a2c..5a4b23f 100644
--- a/common/gtk-3.0/3.14/gtk-contained-solid-dark.css
+++ b/common/gtk-3.0/3.14/gtk-contained-solid-dark.css
@@ -3858,16 +3858,39 @@ GtkFileChooserDialog .action-bar.frame GtkComboBox,
 GtkFileChooserDialog .dialog-vbox > .frame GtkLabel, GtkFileChooserDialog .dialog-vbox > .frame GtkComboBox {
   color: #BAC3CF; }
 
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator:backdrop,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd > .titlebar .pane-separator,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator,
+GeditWindow.background.csd > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator:backdrop {
+  background-color: #262a33; }
+
+FeedReaderreaderUI.background.csd > .titlebar,
+GeditWindow.background.csd > .titlebar {
+  background-color: transparent; }
+
+FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #2f343f; }
+  FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #323843; }
+
+FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #2f343f; }
+  FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #323843; }
+
 GeditWindow.background.csd {
   background-color: transparent; }
   GeditWindow.background.csd .pane-separator,
   GeditWindow.background.csd .pane-separator:hover {
     background-color: #2a2d37; }
-  GeditWindow.background.csd .titlebar .pane-separator,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator,
-  GeditWindow.background.csd .titlebar .pane-separator:backdrop,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator:backdrop {
-    background-color: #262a33; }
 
 .gedit-bottom-panel-paned {
   background-color: #404552; }
diff --git a/common/gtk-3.0/3.14/gtk-contained-solid-darker.css b/common/gtk-3.0/3.14/gtk-contained-solid-darker.css
index 4d5a6e9..d86f9df 100644
--- a/common/gtk-3.0/3.14/gtk-contained-solid-darker.css
+++ b/common/gtk-3.0/3.14/gtk-contained-solid-darker.css
@@ -3851,16 +3851,39 @@ GtkFileChooserDialog .action-bar.frame GtkComboBox,
 GtkFileChooserDialog .dialog-vbox > .frame GtkLabel, GtkFileChooserDialog .dialog-vbox > .frame GtkComboBox {
   color: #BAC3CF; }
 
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator:backdrop,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd > .titlebar .pane-separator,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator,
+GeditWindow.background.csd > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator:backdrop {
+  background-color: #262a33; }
+
+FeedReaderreaderUI.background.csd > .titlebar,
+GeditWindow.background.csd > .titlebar {
+  background-color: transparent; }
+
+FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #2f343f; }
+  FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #323843; }
+
+FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #2f343f; }
+  FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #323843; }
+
 GeditWindow.background.csd {
   background-color: transparent; }
   GeditWindow.background.csd .pane-separator,
   GeditWindow.background.csd .pane-separator:hover {
     background-color: #353945; }
-  GeditWindow.background.csd .titlebar .pane-separator,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator,
-  GeditWindow.background.csd .titlebar .pane-separator:backdrop,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator:backdrop {
-    background-color: #262a33; }
 
 .gedit-bottom-panel-paned {
   background-color: #ffffff; }
diff --git a/common/gtk-3.0/3.14/gtk-contained-solid.css b/common/gtk-3.0/3.14/gtk-contained-solid.css
index fd78f2b..c83c739 100644
--- a/common/gtk-3.0/3.14/gtk-contained-solid.css
+++ b/common/gtk-3.0/3.14/gtk-contained-solid.css
@@ -3851,16 +3851,39 @@ GtkFileChooserDialog .action-bar.frame GtkComboBox,
 GtkFileChooserDialog .dialog-vbox > .frame GtkLabel, GtkFileChooserDialog .dialog-vbox > .frame GtkComboBox {
   color: #BAC3CF; }
 
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator:backdrop,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd > .titlebar .pane-separator,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator,
+GeditWindow.background.csd > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator:backdrop {
+  background-color: #d4d5db; }
+
+FeedReaderreaderUI.background.csd > .titlebar,
+GeditWindow.background.csd > .titlebar {
+  background-color: transparent; }
+
+FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #e7e8eb; }
+  FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #eff0f2; }
+
+FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #e7e8eb; }
+  FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #eff0f2; }
+
 GeditWindow.background.csd {
   background-color: transparent; }
   GeditWindow.background.csd .pane-separator,
   GeditWindow.background.csd .pane-separator:hover {
     background-color: #353945; }
-  GeditWindow.background.csd .titlebar .pane-separator,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator,
-  GeditWindow.background.csd .titlebar .pane-separator:backdrop,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator:backdrop {
-    background-color: #d4d5db; }
 
 .gedit-bottom-panel-paned {
   background-color: #ffffff; }
diff --git a/common/gtk-3.0/3.14/gtk-contained.css b/common/gtk-3.0/3.14/gtk-contained.css
index b608836..058d959 100644
--- a/common/gtk-3.0/3.14/gtk-contained.css
+++ b/common/gtk-3.0/3.14/gtk-contained.css
@@ -3851,16 +3851,39 @@ GtkFileChooserDialog .action-bar.frame GtkComboBox,
 GtkFileChooserDialog .dialog-vbox > .frame GtkLabel, GtkFileChooserDialog .dialog-vbox > .frame GtkComboBox {
   color: #BAC3CF; }
 
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator:backdrop,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd > .titlebar .pane-separator,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator,
+GeditWindow.background.csd > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator:backdrop {
+  background-color: rgba(212, 213, 219, 0.95); }
+
+FeedReaderreaderUI.background.csd > .titlebar,
+GeditWindow.background.csd > .titlebar {
+  background-color: transparent; }
+
+FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: rgba(231, 232, 235, 0.95); }
+  FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: rgba(239, 240, 242, 0.95); }
+
+FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #e7e8eb; }
+  FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #eff0f2; }
+
 GeditWindow.background.csd {
   background-color: transparent; }
   GeditWindow.background.csd .pane-separator,
   GeditWindow.background.csd .pane-separator:hover {
     background-color: rgba(53, 57, 69, 0.95); }
-  GeditWindow.background.csd .titlebar .pane-separator,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator,
-  GeditWindow.background.csd .titlebar .pane-separator:backdrop,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator:backdrop {
-    background-color: rgba(212, 213, 219, 0.95); }
 
 .gedit-bottom-panel-paned {
   background-color: #ffffff; }
diff --git a/common/gtk-3.0/3.14/sass/_transparent_widgets.scss b/common/gtk-3.0/3.14/sass/_transparent_widgets.scss
index 2f92987..47c2a72 100644
--- a/common/gtk-3.0/3.14/sass/_transparent_widgets.scss
+++ b/common/gtk-3.0/3.14/sass/_transparent_widgets.scss
@@ -113,17 +113,38 @@ GtkFileChooserDialog {
   }
 }
 
-// Gedit sidebar
+//
+// Paned Headerbars
+//
+FeedReaderreaderUI.background.csd,
+GeditWindow.background.csd {
+
+  > .titlebar .pane-separator,
+  &.maximized > .titlebar .pane-separator,
+  > .titlebar .pane-separator:backdrop,
+  &.maximized > .titlebar .pane-separator:backdrop { background-color: $header_border; }
+
+  > .titlebar { background-color: transparent; }
+
+  > .titlebar > GtkHeaderBar.header-bar.titlebar {
+    background-color: $header_bg;
+
+    &:backdrop { background-color: $header_bg_backdrop; }
+  }
+
+  &.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
+    background-color: opacify($header_bg, 1);
+
+    &:backdrop { background-color: opacify($header_bg_backdrop, 1); }
+  }
+}
+
+// Gedit
 GeditWindow.background.csd {
   background-color: transparent;
 
   .pane-separator,
   .pane-separator:hover { background-color: $dark_sidebar_border; }
-
-  .titlebar .pane-separator,
-  &.maximized .titlebar .pane-separator,
-  .titlebar .pane-separator:backdrop,
-  &.maximized .titlebar .pane-separator:backdrop { background-color: $header_border; }
 }
 
 .gedit-bottom-panel-paned { background-color: $base_color; }
diff --git a/common/gtk-3.0/3.16/gtk-contained-dark.css b/common/gtk-3.0/3.16/gtk-contained-dark.css
index 120a90d..287431a 100644
--- a/common/gtk-3.0/3.16/gtk-contained-dark.css
+++ b/common/gtk-3.0/3.16/gtk-contained-dark.css
@@ -3808,16 +3808,39 @@ GtkFileChooserDialog .action-bar.frame GtkComboBox,
 GtkFileChooserDialog .dialog-vbox > .frame GtkLabel, GtkFileChooserDialog .dialog-vbox > .frame GtkComboBox {
   color: #BAC3CF; }
 
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator:backdrop,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd > .titlebar .pane-separator,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator,
+GeditWindow.background.csd > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator:backdrop {
+  background-color: rgba(38, 42, 51, 0.97); }
+
+FeedReaderreaderUI.background.csd > .titlebar,
+GeditWindow.background.csd > .titlebar {
+  background-color: transparent; }
+
+FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: rgba(47, 52, 63, 0.97); }
+  FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: rgba(50, 56, 67, 0.97); }
+
+FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #2f343f; }
+  FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #323843; }
+
 GeditWindow.background.csd {
   background-color: transparent; }
   GeditWindow.background.csd .pane-separator,
   GeditWindow.background.csd .pane-separator:hover {
     background-color: rgba(42, 45, 55, 0.95); }
-  GeditWindow.background.csd .titlebar .pane-separator,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator,
-  GeditWindow.background.csd .titlebar .pane-separator:backdrop,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator:backdrop {
-    background-color: rgba(38, 42, 51, 0.97); }
 
 .gedit-bottom-panel-paned {
   background-color: #404552; }
diff --git a/common/gtk-3.0/3.16/gtk-contained-darker.css b/common/gtk-3.0/3.16/gtk-contained-darker.css
index 297698f..74ad54f 100644
--- a/common/gtk-3.0/3.16/gtk-contained-darker.css
+++ b/common/gtk-3.0/3.16/gtk-contained-darker.css
@@ -3801,16 +3801,39 @@ GtkFileChooserDialog .action-bar.frame GtkComboBox,
 GtkFileChooserDialog .dialog-vbox > .frame GtkLabel, GtkFileChooserDialog .dialog-vbox > .frame GtkComboBox {
   color: #BAC3CF; }
 
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator:backdrop,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd > .titlebar .pane-separator,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator,
+GeditWindow.background.csd > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator:backdrop {
+  background-color: rgba(38, 42, 51, 0.97); }
+
+FeedReaderreaderUI.background.csd > .titlebar,
+GeditWindow.background.csd > .titlebar {
+  background-color: transparent; }
+
+FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: rgba(47, 52, 63, 0.97); }
+  FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: rgba(50, 56, 67, 0.97); }
+
+FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #2f343f; }
+  FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #323843; }
+
 GeditWindow.background.csd {
   background-color: transparent; }
   GeditWindow.background.csd .pane-separator,
   GeditWindow.background.csd .pane-separator:hover {
     background-color: rgba(53, 57, 69, 0.95); }
-  GeditWindow.background.csd .titlebar .pane-separator,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator,
-  GeditWindow.background.csd .titlebar .pane-separator:backdrop,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator:backdrop {
-    background-color: rgba(38, 42, 51, 0.97); }
 
 .gedit-bottom-panel-paned {
   background-color: #ffffff; }
diff --git a/common/gtk-3.0/3.16/gtk-contained-solid-dark.css b/common/gtk-3.0/3.16/gtk-contained-solid-dark.css
index ba3e0e2..777b33a 100644
--- a/common/gtk-3.0/3.16/gtk-contained-solid-dark.css
+++ b/common/gtk-3.0/3.16/gtk-contained-solid-dark.css
@@ -3808,16 +3808,39 @@ GtkFileChooserDialog .action-bar.frame GtkComboBox,
 GtkFileChooserDialog .dialog-vbox > .frame GtkLabel, GtkFileChooserDialog .dialog-vbox > .frame GtkComboBox {
   color: #BAC3CF; }
 
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator:backdrop,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd > .titlebar .pane-separator,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator,
+GeditWindow.background.csd > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator:backdrop {
+  background-color: #262a33; }
+
+FeedReaderreaderUI.background.csd > .titlebar,
+GeditWindow.background.csd > .titlebar {
+  background-color: transparent; }
+
+FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #2f343f; }
+  FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #323843; }
+
+FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #2f343f; }
+  FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #323843; }
+
 GeditWindow.background.csd {
   background-color: transparent; }
   GeditWindow.background.csd .pane-separator,
   GeditWindow.background.csd .pane-separator:hover {
     background-color: #2a2d37; }
-  GeditWindow.background.csd .titlebar .pane-separator,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator,
-  GeditWindow.background.csd .titlebar .pane-separator:backdrop,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator:backdrop {
-    background-color: #262a33; }
 
 .gedit-bottom-panel-paned {
   background-color: #404552; }
diff --git a/common/gtk-3.0/3.16/gtk-contained-solid-darker.css b/common/gtk-3.0/3.16/gtk-contained-solid-darker.css
index 93dc45b..d54b0e5 100644
--- a/common/gtk-3.0/3.16/gtk-contained-solid-darker.css
+++ b/common/gtk-3.0/3.16/gtk-contained-solid-darker.css
@@ -3801,16 +3801,39 @@ GtkFileChooserDialog .action-bar.frame GtkComboBox,
 GtkFileChooserDialog .dialog-vbox > .frame GtkLabel, GtkFileChooserDialog .dialog-vbox > .frame GtkComboBox {
   color: #BAC3CF; }
 
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator:backdrop,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd > .titlebar .pane-separator,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator,
+GeditWindow.background.csd > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator:backdrop {
+  background-color: #262a33; }
+
+FeedReaderreaderUI.background.csd > .titlebar,
+GeditWindow.background.csd > .titlebar {
+  background-color: transparent; }
+
+FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #2f343f; }
+  FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #323843; }
+
+FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #2f343f; }
+  FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #323843; }
+
 GeditWindow.background.csd {
   background-color: transparent; }
   GeditWindow.background.csd .pane-separator,
   GeditWindow.background.csd .pane-separator:hover {
     background-color: #353945; }
-  GeditWindow.background.csd .titlebar .pane-separator,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator,
-  GeditWindow.background.csd .titlebar .pane-separator:backdrop,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator:backdrop {
-    background-color: #262a33; }
 
 .gedit-bottom-panel-paned {
   background-color: #ffffff; }
diff --git a/common/gtk-3.0/3.16/gtk-contained-solid.css b/common/gtk-3.0/3.16/gtk-contained-solid.css
index 612138a..eb8cb59 100644
--- a/common/gtk-3.0/3.16/gtk-contained-solid.css
+++ b/common/gtk-3.0/3.16/gtk-contained-solid.css
@@ -3801,16 +3801,39 @@ GtkFileChooserDialog .action-bar.frame GtkComboBox,
 GtkFileChooserDialog .dialog-vbox > .frame GtkLabel, GtkFileChooserDialog .dialog-vbox > .frame GtkComboBox {
   color: #BAC3CF; }
 
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator:backdrop,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd > .titlebar .pane-separator,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator,
+GeditWindow.background.csd > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator:backdrop {
+  background-color: #d4d5db; }
+
+FeedReaderreaderUI.background.csd > .titlebar,
+GeditWindow.background.csd > .titlebar {
+  background-color: transparent; }
+
+FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #e7e8eb; }
+  FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #eff0f2; }
+
+FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #e7e8eb; }
+  FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #eff0f2; }
+
 GeditWindow.background.csd {
   background-color: transparent; }
   GeditWindow.background.csd .pane-separator,
   GeditWindow.background.csd .pane-separator:hover {
     background-color: #353945; }
-  GeditWindow.background.csd .titlebar .pane-separator,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator,
-  GeditWindow.background.csd .titlebar .pane-separator:backdrop,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator:backdrop {
-    background-color: #d4d5db; }
 
 .gedit-bottom-panel-paned {
   background-color: #ffffff; }
diff --git a/common/gtk-3.0/3.16/gtk-contained.css b/common/gtk-3.0/3.16/gtk-contained.css
index a0f8e2e..a7ec353 100644
--- a/common/gtk-3.0/3.16/gtk-contained.css
+++ b/common/gtk-3.0/3.16/gtk-contained.css
@@ -3801,16 +3801,39 @@ GtkFileChooserDialog .action-bar.frame GtkComboBox,
 GtkFileChooserDialog .dialog-vbox > .frame GtkLabel, GtkFileChooserDialog .dialog-vbox > .frame GtkComboBox {
   color: #BAC3CF; }
 
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator:backdrop,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd > .titlebar .pane-separator,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator,
+GeditWindow.background.csd > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator:backdrop {
+  background-color: rgba(212, 213, 219, 0.95); }
+
+FeedReaderreaderUI.background.csd > .titlebar,
+GeditWindow.background.csd > .titlebar {
+  background-color: transparent; }
+
+FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: rgba(231, 232, 235, 0.95); }
+  FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: rgba(239, 240, 242, 0.95); }
+
+FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #e7e8eb; }
+  FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #eff0f2; }
+
 GeditWindow.background.csd {
   background-color: transparent; }
   GeditWindow.background.csd .pane-separator,
   GeditWindow.background.csd .pane-separator:hover {
     background-color: rgba(53, 57, 69, 0.95); }
-  GeditWindow.background.csd .titlebar .pane-separator,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator,
-  GeditWindow.background.csd .titlebar .pane-separator:backdrop,
-  GeditWindow.background.csd.maximized .titlebar .pane-separator:backdrop {
-    background-color: rgba(212, 213, 219, 0.95); }
 
 .gedit-bottom-panel-paned {
   background-color: #ffffff; }
diff --git a/common/gtk-3.0/3.16/sass/_transparent_widgets.scss b/common/gtk-3.0/3.16/sass/_transparent_widgets.scss
index f3fe8a2..1c36e22 100644
--- a/common/gtk-3.0/3.16/sass/_transparent_widgets.scss
+++ b/common/gtk-3.0/3.16/sass/_transparent_widgets.scss
@@ -112,17 +112,38 @@ GtkFileChooserDialog {
   }
 }
 
-// Gedit sidebar
+//
+// Paned Headerbars
+//
+FeedReaderreaderUI.background.csd,
+GeditWindow.background.csd {
+
+  > .titlebar .pane-separator,
+  &.maximized > .titlebar .pane-separator,
+  > .titlebar .pane-separator:backdrop,
+  &.maximized > .titlebar .pane-separator:backdrop { background-color: $header_border; }
+
+  > .titlebar { background-color: transparent; }
+
+  > .titlebar > GtkHeaderBar.header-bar.titlebar {
+    background-color: $header_bg;
+
+    &:backdrop { background-color: $header_bg_backdrop; }
+  }
+
+  &.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
+    background-color: opacify($header_bg, 1);
+
+    &:backdrop { background-color: opacify($header_bg_backdrop, 1); }
+  }
+}
+
+// Gedit
 GeditWindow.background.csd {
   background-color: transparent;
 
   .pane-separator,
   .pane-separator:hover { background-color: $dark_sidebar_border; }
-
-  .titlebar .pane-separator,
-  &.maximized .titlebar .pane-separator,
-  .titlebar .pane-separator:backdrop,
-  &.maximized .titlebar .pane-separator:backdrop { background-color: $header_border; }
 }
 
 .gedit-bottom-panel-paned { background-color: $base_color; }
diff --git a/common/gtk-3.0/3.18/gtk-contained-dark.css b/common/gtk-3.0/3.18/gtk-contained-dark.css
index 29c7496..8a40d53 100644
--- a/common/gtk-3.0/3.18/gtk-contained-dark.css
+++ b/common/gtk-3.0/3.18/gtk-contained-dark.css
@@ -3492,7 +3492,6 @@ UnityDecoration {
     box-shadow: inset 0 1px rgba(54, 59, 72, 0.97); }
     UnityDecoration.top:backdrop {
       border-bottom-width: 0;
-      background-image: linear-gradient(to bottom, #323843);
       color: rgba(207, 218, 231, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom,
   UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
@@ -4000,34 +3999,39 @@ GtkFileChooserDialog GtkFileChooserWidget > GtkActionBar > GtkRevealer > .action
 GtkFileChooserDialog .dialog-vbox > .frame GtkLabel, GtkFileChooserDialog .dialog-vbox > .frame GtkComboBox {
   color: #BAC3CF; }
 
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator:backdrop,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd > .titlebar .pane-separator,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator,
+GeditWindow.background.csd > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator:backdrop {
+  background-color: rgba(38, 42, 51, 0.97); }
+
+FeedReaderreaderUI.background.csd > .titlebar,
+GeditWindow.background.csd > .titlebar {
+  background-color: transparent; }
+
+FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: rgba(47, 52, 63, 0.97); }
+  FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: rgba(50, 56, 67, 0.97); }
+
+FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #2f343f; }
+  FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #323843; }
+
 GeditWindow.background.csd {
   background-color: transparent; }
   GeditWindow.background.csd .pane-separator,
   GeditWindow.background.csd .pane-separator:hover {
     background-color: rgba(42, 45, 55, 0.95); }
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar .pane-separator,
-  GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar .pane-separator,
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar .pane-separator:backdrop,
-  GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar .pane-separator:backdrop {
-    background-color: rgba(38, 42, 51, 0.97); }
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar {
-    background-color: transparent; }
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar,
-  GeditWindow.background.csd .gedit-titlebar-left,
-  GeditWindow.background.csd .gedit-titlebar-right {
-    background-color: rgba(47, 52, 63, 0.97); }
-    GeditWindow.background.csd .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
-    GeditWindow.background.csd .gedit-titlebar-left:backdrop,
-    GeditWindow.background.csd .gedit-titlebar-right:backdrop {
-      background-color: rgba(50, 56, 67, 0.97); }
-  GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar,
-  GeditWindow.background.csd.maximized .gedit-titlebar-left,
-  GeditWindow.background.csd.maximized .gedit-titlebar-right {
-    background-color: #2f343f; }
-    GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
-    GeditWindow.background.csd.maximized .gedit-titlebar-left:backdrop,
-    GeditWindow.background.csd.maximized .gedit-titlebar-right:backdrop {
-      background-color: #323843; }
 
 .gedit-bottom-panel-paned {
   background-color: #404552; }
diff --git a/common/gtk-3.0/3.18/gtk-contained-darker.css b/common/gtk-3.0/3.18/gtk-contained-darker.css
index 513732e..1bec218 100644
--- a/common/gtk-3.0/3.18/gtk-contained-darker.css
+++ b/common/gtk-3.0/3.18/gtk-contained-darker.css
@@ -3495,7 +3495,6 @@ UnityDecoration {
     box-shadow: inset 0 1px rgba(54, 59, 72, 0.97); }
     UnityDecoration.top:backdrop {
       border-bottom-width: 0;
-      background-image: linear-gradient(to bottom, #323843);
       color: rgba(207, 218, 231, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom,
   UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
@@ -3993,34 +3992,39 @@ GtkFileChooserDialog GtkFileChooserWidget > GtkActionBar > GtkRevealer > .action
 GtkFileChooserDialog .dialog-vbox > .frame GtkLabel, GtkFileChooserDialog .dialog-vbox > .frame GtkComboBox {
   color: #BAC3CF; }
 
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator:backdrop,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd > .titlebar .pane-separator,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator,
+GeditWindow.background.csd > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator:backdrop {
+  background-color: rgba(38, 42, 51, 0.97); }
+
+FeedReaderreaderUI.background.csd > .titlebar,
+GeditWindow.background.csd > .titlebar {
+  background-color: transparent; }
+
+FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: rgba(47, 52, 63, 0.97); }
+  FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: rgba(50, 56, 67, 0.97); }
+
+FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #2f343f; }
+  FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #323843; }
+
 GeditWindow.background.csd {
   background-color: transparent; }
   GeditWindow.background.csd .pane-separator,
   GeditWindow.background.csd .pane-separator:hover {
     background-color: rgba(53, 57, 69, 0.95); }
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar .pane-separator,
-  GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar .pane-separator,
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar .pane-separator:backdrop,
-  GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar .pane-separator:backdrop {
-    background-color: rgba(38, 42, 51, 0.97); }
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar {
-    background-color: transparent; }
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar,
-  GeditWindow.background.csd .gedit-titlebar-left,
-  GeditWindow.background.csd .gedit-titlebar-right {
-    background-color: rgba(47, 52, 63, 0.97); }
-    GeditWindow.background.csd .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
-    GeditWindow.background.csd .gedit-titlebar-left:backdrop,
-    GeditWindow.background.csd .gedit-titlebar-right:backdrop {
-      background-color: rgba(50, 56, 67, 0.97); }
-  GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar,
-  GeditWindow.background.csd.maximized .gedit-titlebar-left,
-  GeditWindow.background.csd.maximized .gedit-titlebar-right {
-    background-color: #2f343f; }
-    GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
-    GeditWindow.background.csd.maximized .gedit-titlebar-left:backdrop,
-    GeditWindow.background.csd.maximized .gedit-titlebar-right:backdrop {
-      background-color: #323843; }
 
 .gedit-bottom-panel-paned {
   background-color: #ffffff; }
diff --git a/common/gtk-3.0/3.18/gtk-contained-solid-dark.css b/common/gtk-3.0/3.18/gtk-contained-solid-dark.css
index 15d731c..22efbfc 100644
--- a/common/gtk-3.0/3.18/gtk-contained-solid-dark.css
+++ b/common/gtk-3.0/3.18/gtk-contained-solid-dark.css
@@ -3492,7 +3492,6 @@ UnityDecoration {
     box-shadow: inset 0 1px #363b48; }
     UnityDecoration.top:backdrop {
       border-bottom-width: 0;
-      background-image: linear-gradient(to bottom, #323843);
       color: rgba(207, 218, 231, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom,
   UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
@@ -4000,34 +3999,39 @@ GtkFileChooserDialog GtkFileChooserWidget > GtkActionBar > GtkRevealer > .action
 GtkFileChooserDialog .dialog-vbox > .frame GtkLabel, GtkFileChooserDialog .dialog-vbox > .frame GtkComboBox {
   color: #BAC3CF; }
 
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator:backdrop,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd > .titlebar .pane-separator,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator,
+GeditWindow.background.csd > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator:backdrop {
+  background-color: #262a33; }
+
+FeedReaderreaderUI.background.csd > .titlebar,
+GeditWindow.background.csd > .titlebar {
+  background-color: transparent; }
+
+FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #2f343f; }
+  FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #323843; }
+
+FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #2f343f; }
+  FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #323843; }
+
 GeditWindow.background.csd {
   background-color: transparent; }
   GeditWindow.background.csd .pane-separator,
   GeditWindow.background.csd .pane-separator:hover {
     background-color: #2a2d37; }
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar .pane-separator,
-  GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar .pane-separator,
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar .pane-separator:backdrop,
-  GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar .pane-separator:backdrop {
-    background-color: #262a33; }
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar {
-    background-color: transparent; }
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar,
-  GeditWindow.background.csd .gedit-titlebar-left,
-  GeditWindow.background.csd .gedit-titlebar-right {
-    background-color: #2f343f; }
-    GeditWindow.background.csd .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
-    GeditWindow.background.csd .gedit-titlebar-left:backdrop,
-    GeditWindow.background.csd .gedit-titlebar-right:backdrop {
-      background-color: #323843; }
-  GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar,
-  GeditWindow.background.csd.maximized .gedit-titlebar-left,
-  GeditWindow.background.csd.maximized .gedit-titlebar-right {
-    background-color: #2f343f; }
-    GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
-    GeditWindow.background.csd.maximized .gedit-titlebar-left:backdrop,
-    GeditWindow.background.csd.maximized .gedit-titlebar-right:backdrop {
-      background-color: #323843; }
 
 .gedit-bottom-panel-paned {
   background-color: #404552; }
diff --git a/common/gtk-3.0/3.18/gtk-contained-solid-darker.css b/common/gtk-3.0/3.18/gtk-contained-solid-darker.css
index 8ca1bc4..2b6987c 100644
--- a/common/gtk-3.0/3.18/gtk-contained-solid-darker.css
+++ b/common/gtk-3.0/3.18/gtk-contained-solid-darker.css
@@ -3495,7 +3495,6 @@ UnityDecoration {
     box-shadow: inset 0 1px #363b48; }
     UnityDecoration.top:backdrop {
       border-bottom-width: 0;
-      background-image: linear-gradient(to bottom, #323843);
       color: rgba(207, 218, 231, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom,
   UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
@@ -3993,34 +3992,39 @@ GtkFileChooserDialog GtkFileChooserWidget > GtkActionBar > GtkRevealer > .action
 GtkFileChooserDialog .dialog-vbox > .frame GtkLabel, GtkFileChooserDialog .dialog-vbox > .frame GtkComboBox {
   color: #BAC3CF; }
 
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator:backdrop,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd > .titlebar .pane-separator,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator,
+GeditWindow.background.csd > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator:backdrop {
+  background-color: #262a33; }
+
+FeedReaderreaderUI.background.csd > .titlebar,
+GeditWindow.background.csd > .titlebar {
+  background-color: transparent; }
+
+FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #2f343f; }
+  FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #323843; }
+
+FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #2f343f; }
+  FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #323843; }
+
 GeditWindow.background.csd {
   background-color: transparent; }
   GeditWindow.background.csd .pane-separator,
   GeditWindow.background.csd .pane-separator:hover {
     background-color: #353945; }
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar .pane-separator,
-  GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar .pane-separator,
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar .pane-separator:backdrop,
-  GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar .pane-separator:backdrop {
-    background-color: #262a33; }
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar {
-    background-color: transparent; }
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar,
-  GeditWindow.background.csd .gedit-titlebar-left,
-  GeditWindow.background.csd .gedit-titlebar-right {
-    background-color: #2f343f; }
-    GeditWindow.background.csd .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
-    GeditWindow.background.csd .gedit-titlebar-left:backdrop,
-    GeditWindow.background.csd .gedit-titlebar-right:backdrop {
-      background-color: #323843; }
-  GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar,
-  GeditWindow.background.csd.maximized .gedit-titlebar-left,
-  GeditWindow.background.csd.maximized .gedit-titlebar-right {
-    background-color: #2f343f; }
-    GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
-    GeditWindow.background.csd.maximized .gedit-titlebar-left:backdrop,
-    GeditWindow.background.csd.maximized .gedit-titlebar-right:backdrop {
-      background-color: #323843; }
 
 .gedit-bottom-panel-paned {
   background-color: #ffffff; }
diff --git a/common/gtk-3.0/3.18/gtk-contained-solid.css b/common/gtk-3.0/3.18/gtk-contained-solid.css
index dcecd0e..48c7299 100644
--- a/common/gtk-3.0/3.18/gtk-contained-solid.css
+++ b/common/gtk-3.0/3.18/gtk-contained-solid.css
@@ -3499,7 +3499,6 @@ UnityDecoration {
     box-shadow: inset 0 1px #eff0f2; }
     UnityDecoration.top:backdrop {
       border-bottom-width: 0;
-      background-image: linear-gradient(to bottom, #eff0f2);
       color: rgba(82, 93, 118, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom,
   UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
@@ -3997,34 +3996,39 @@ GtkFileChooserDialog GtkFileChooserWidget > GtkActionBar > GtkRevealer > .action
 GtkFileChooserDialog .dialog-vbox > .frame GtkLabel, GtkFileChooserDialog .dialog-vbox > .frame GtkComboBox {
   color: #BAC3CF; }
 
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator:backdrop,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd > .titlebar .pane-separator,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator,
+GeditWindow.background.csd > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator:backdrop {
+  background-color: #d4d5db; }
+
+FeedReaderreaderUI.background.csd > .titlebar,
+GeditWindow.background.csd > .titlebar {
+  background-color: transparent; }
+
+FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #e7e8eb; }
+  FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #eff0f2; }
+
+FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #e7e8eb; }
+  FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #eff0f2; }
+
 GeditWindow.background.csd {
   background-color: transparent; }
   GeditWindow.background.csd .pane-separator,
   GeditWindow.background.csd .pane-separator:hover {
     background-color: #353945; }
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar .pane-separator,
-  GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar .pane-separator,
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar .pane-separator:backdrop,
-  GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar .pane-separator:backdrop {
-    background-color: #d4d5db; }
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar {
-    background-color: transparent; }
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar,
-  GeditWindow.background.csd .gedit-titlebar-left,
-  GeditWindow.background.csd .gedit-titlebar-right {
-    background-color: #e7e8eb; }
-    GeditWindow.background.csd .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
-    GeditWindow.background.csd .gedit-titlebar-left:backdrop,
-    GeditWindow.background.csd .gedit-titlebar-right:backdrop {
-      background-color: #eff0f2; }
-  GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar,
-  GeditWindow.background.csd.maximized .gedit-titlebar-left,
-  GeditWindow.background.csd.maximized .gedit-titlebar-right {
-    background-color: #e7e8eb; }
-    GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
-    GeditWindow.background.csd.maximized .gedit-titlebar-left:backdrop,
-    GeditWindow.background.csd.maximized .gedit-titlebar-right:backdrop {
-      background-color: #eff0f2; }
 
 .gedit-bottom-panel-paned {
   background-color: #ffffff; }
diff --git a/common/gtk-3.0/3.18/gtk-contained.css b/common/gtk-3.0/3.18/gtk-contained.css
index c327774..0b90310 100644
--- a/common/gtk-3.0/3.18/gtk-contained.css
+++ b/common/gtk-3.0/3.18/gtk-contained.css
@@ -3499,7 +3499,6 @@ UnityDecoration {
     box-shadow: inset 0 1px rgba(239, 240, 242, 0.95); }
     UnityDecoration.top:backdrop {
       border-bottom-width: 0;
-      background-image: linear-gradient(to bottom, #eff0f2);
       color: rgba(82, 93, 118, 0.5); }
   UnityDecoration.left, UnityDecoration.right, UnityDecoration.bottom,
   UnityDecoration.left:backdrop, UnityDecoration.right:backdrop, UnityDecoration.bottom:backdrop {
@@ -3997,34 +3996,39 @@ GtkFileChooserDialog GtkFileChooserWidget > GtkActionBar > GtkRevealer > .action
 GtkFileChooserDialog .dialog-vbox > .frame GtkLabel, GtkFileChooserDialog .dialog-vbox > .frame GtkComboBox {
   color: #BAC3CF; }
 
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator,
+FeedReaderreaderUI.background.csd > .titlebar .pane-separator:backdrop,
+FeedReaderreaderUI.background.csd.maximized > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd > .titlebar .pane-separator,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator,
+GeditWindow.background.csd > .titlebar .pane-separator:backdrop,
+GeditWindow.background.csd.maximized > .titlebar .pane-separator:backdrop {
+  background-color: rgba(212, 213, 219, 0.95); }
+
+FeedReaderreaderUI.background.csd > .titlebar,
+GeditWindow.background.csd > .titlebar {
+  background-color: transparent; }
+
+FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: rgba(231, 232, 235, 0.95); }
+  FeedReaderreaderUI.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: rgba(239, 240, 242, 0.95); }
+
+FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar,
+GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
+  background-color: #e7e8eb; }
+  FeedReaderreaderUI.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
+  GeditWindow.background.csd.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar:backdrop {
+    background-color: #eff0f2; }
+
 GeditWindow.background.csd {
   background-color: transparent; }
   GeditWindow.background.csd .pane-separator,
   GeditWindow.background.csd .pane-separator:hover {
     background-color: rgba(53, 57, 69, 0.95); }
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar .pane-separator,
-  GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar .pane-separator,
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar .pane-separator:backdrop,
-  GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar .pane-separator:backdrop {
-    background-color: rgba(212, 213, 219, 0.95); }
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar {
-    background-color: transparent; }
-  GeditWindow.background.csd .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar,
-  GeditWindow.background.csd .gedit-titlebar-left,
-  GeditWindow.background.csd .gedit-titlebar-right {
-    background-color: rgba(231, 232, 235, 0.95); }
-    GeditWindow.background.csd .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
-    GeditWindow.background.csd .gedit-titlebar-left:backdrop,
-    GeditWindow.background.csd .gedit-titlebar-right:backdrop {
-      background-color: rgba(239, 240, 242, 0.95); }
-  GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar,
-  GeditWindow.background.csd.maximized .gedit-titlebar-left,
-  GeditWindow.background.csd.maximized .gedit-titlebar-right {
-    background-color: #e7e8eb; }
-    GeditWindow.background.csd.maximized .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar:backdrop,
-    GeditWindow.background.csd.maximized .gedit-titlebar-left:backdrop,
-    GeditWindow.background.csd.maximized .gedit-titlebar-right:backdrop {
-      background-color: #eff0f2; }
 
 .gedit-bottom-panel-paned {
   background-color: #ffffff; }
diff --git a/common/gtk-3.0/3.18/sass/_transparent_widgets.scss b/common/gtk-3.0/3.18/sass/_transparent_widgets.scss
index f12395c..fee73fe 100644
--- a/common/gtk-3.0/3.18/sass/_transparent_widgets.scss
+++ b/common/gtk-3.0/3.18/sass/_transparent_widgets.scss
@@ -154,36 +154,38 @@ GtkFileChooserDialog {
   }
 }
 
-// Gedit sidebar
+//
+// Paned Headerbars
+//
+FeedReaderreaderUI.background.csd,
 GeditWindow.background.csd {
-  background-color: transparent;
 
-  .pane-separator,
-  .pane-separator:hover { background-color: $dark_sidebar_border; }
+  > .titlebar .pane-separator,
+  &.maximized > .titlebar .pane-separator,
+  > .titlebar .pane-separator:backdrop,
+  &.maximized > .titlebar .pane-separator:backdrop { background-color: $header_border; }
 
-  .gedit-headerbar-paned.titlebar .pane-separator,
-  &.maximized .gedit-headerbar-paned.titlebar .pane-separator,
-  .gedit-headerbar-paned.titlebar .pane-separator:backdrop,
-  &.maximized .gedit-headerbar-paned.titlebar .pane-separator:backdrop { background-color: $header_border; }
+  > .titlebar { background-color: transparent; }
 
-  .gedit-headerbar-paned.titlebar { background-color: transparent; }
-
-  .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar,
-  .gedit-titlebar-left,
-  .gedit-titlebar-right {
+  > .titlebar > GtkHeaderBar.header-bar.titlebar {
     background-color: $header_bg;
 
     &:backdrop { background-color: $header_bg_backdrop; }
   }
 
-  &.maximized .gedit-headerbar-paned.titlebar > GtkHeaderBar.header-bar.titlebar,
-  &.maximized .gedit-titlebar-left,
-  &.maximized .gedit-titlebar-right {
+  &.maximized > .titlebar > GtkHeaderBar.header-bar.titlebar {
     background-color: opacify($header_bg, 1);
 
     &:backdrop { background-color: opacify($header_bg_backdrop, 1); }
   }
+}
 
+// Gedit
+GeditWindow.background.csd {
+  background-color: transparent;
+
+  .pane-separator,
+  .pane-separator:hover { background-color: $dark_sidebar_border; }
 }
 
 .gedit-bottom-panel-paned { background-color: $base_color; }