diff --git a/gtk/theme/Adwaita/_common.scss b/gtk/theme/Adwaita/_common.scss
index 39b009a439..a7860b211c 100644
--- a/gtk/theme/Adwaita/_common.scss
+++ b/gtk/theme/Adwaita/_common.scss
@@ -3212,7 +3212,7 @@ GtkVolumeButton.button { padding: 8px; }
     box-shadow: 0 0 0 1px $_wm_border; //just doing borders, wm draws actual shadows
   }
   &.csd {
-    .popup {
+    &.popup {
       border-radius: 0;
       box-shadow: 0 1px 2px transparentize(black, 0.8),
                   0 0 0 1px transparentize($_wm_border,0.1);
diff --git a/gtk/theme/Adwaita/gtk-contained-dark.css b/gtk/theme/Adwaita/gtk-contained-dark.css
index f8803d7d85..470686323c 100644
--- a/gtk/theme/Adwaita/gtk-contained-dark.css
+++ b/gtk/theme/Adwaita/gtk-contained-dark.css
@@ -482,8 +482,7 @@ GtkTextView {
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
-      .button:backdrop:insensitive > .label, .header-bar .button.titlebutton:backdrop:insensitive > .label,
-      .titlebar .button.titlebutton:backdrop:insensitive > .label, .button.flat:backdrop:insensitive > .label, .header-bar .titlebutton.button:backdrop:insensitive > .label,
+      .button:backdrop:insensitive > .label, .button.flat:backdrop:insensitive > .label, .header-bar .titlebutton.button:backdrop:insensitive > .label,
       .titlebar .titlebutton.button:backdrop:insensitive > .label {
         color: inherit; }
     .button:backdrop:insensitive:active, .button:backdrop:insensitive:checked, .button.flat:backdrop:insensitive:active, .header-bar .titlebutton.button:backdrop:insensitive:active,
@@ -493,9 +492,7 @@ GtkTextView {
       border-color: #1e2222;
       background-image: linear-gradient(to bottom, #262929);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
-      .button:backdrop:insensitive:active > .label, .header-bar .button.titlebutton:backdrop:insensitive:active > .label,
-      .titlebar .button.titlebutton:backdrop:insensitive:active > .label, .button:backdrop:insensitive:checked > .label, .header-bar .button.titlebutton:backdrop:insensitive:checked > .label,
-      .titlebar .button.titlebutton:backdrop:insensitive:checked > .label, .button.flat:backdrop:insensitive:active > .label, .header-bar .titlebutton.button:backdrop:insensitive:active > .label,
+      .button:backdrop:insensitive:active > .label, .button:backdrop:insensitive:checked > .label, .button.flat:backdrop:insensitive:active > .label, .header-bar .titlebutton.button:backdrop:insensitive:active > .label,
       .titlebar .titlebutton.button:backdrop:insensitive:active > .label, .button.flat:backdrop:insensitive:checked > .label, .header-bar .titlebutton.button:backdrop:insensitive:checked > .label,
       .titlebar .titlebutton.button:backdrop:insensitive:checked > .label {
         color: inherit; }
@@ -517,17 +514,14 @@ GtkTextView {
     text-shadow: none;
     icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0.1); }
-    .button:insensitive > .label, .header-bar .button.titlebutton:insensitive > .label,
-    .titlebar .button.titlebutton:insensitive > .label {
+    .button:insensitive > .label {
       color: inherit; }
     .button:insensitive:active, .button:insensitive:checked {
       color: #939695;
       border-color: #1c1f1f;
       background-image: linear-gradient(to bottom, #2f3333, #323636);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0.1); }
-      .button:insensitive:active > .label, .header-bar .button.titlebutton:insensitive:active > .label,
-      .titlebar .button.titlebutton:insensitive:active > .label, .button:insensitive:checked > .label, .header-bar .button.titlebutton:insensitive:checked > .label,
-      .titlebar .button.titlebutton:insensitive:checked > .label {
+      .button:insensitive:active > .label, .button:insensitive:checked > .label {
         color: inherit; }
   .button.osd, .header-bar .osd.button.titlebutton,
   .titlebar .osd.button.titlebutton {
@@ -769,8 +763,7 @@ GtkTextView {
         text-shadow: none;
         icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
-        .button.suggested-action:backdrop:insensitive > .label, .header-bar .suggested-action.button.titlebutton:backdrop:insensitive > .label,
-        .titlebar .suggested-action.button.titlebutton:backdrop:insensitive > .label, .button.suggested-action.flat:backdrop:insensitive > .label, .header-bar .suggested-action.titlebutton.button:backdrop:insensitive > .label,
+        .button.suggested-action:backdrop:insensitive > .label, .button.suggested-action.flat:backdrop:insensitive > .label, .header-bar .suggested-action.titlebutton.button:backdrop:insensitive > .label,
         .titlebar .suggested-action.titlebutton.button:backdrop:insensitive > .label {
           color: inherit; }
         .button.suggested-action:backdrop:insensitive:active, .button.suggested-action:backdrop:insensitive:checked, .button.suggested-action.flat:backdrop:insensitive:active, .header-bar .suggested-action.titlebutton.button:backdrop:insensitive:active,
@@ -780,9 +773,7 @@ GtkTextView {
           border-color: #0b1e33;
           background-image: linear-gradient(to bottom, #1d4876);
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
-          .button.suggested-action:backdrop:insensitive:active > .label, .header-bar .suggested-action.button.titlebutton:backdrop:insensitive:active > .label,
-          .titlebar .suggested-action.button.titlebutton:backdrop:insensitive:active > .label, .button.suggested-action:backdrop:insensitive:checked > .label, .header-bar .suggested-action.button.titlebutton:backdrop:insensitive:checked > .label,
-          .titlebar .suggested-action.button.titlebutton:backdrop:insensitive:checked > .label, .button.suggested-action.flat:backdrop:insensitive:active > .label, .header-bar .suggested-action.titlebutton.button:backdrop:insensitive:active > .label,
+          .button.suggested-action:backdrop:insensitive:active > .label, .button.suggested-action:backdrop:insensitive:checked > .label, .button.suggested-action.flat:backdrop:insensitive:active > .label, .header-bar .suggested-action.titlebutton.button:backdrop:insensitive:active > .label,
           .titlebar .suggested-action.titlebutton.button:backdrop:insensitive:active > .label, .button.suggested-action.flat:backdrop:insensitive:checked > .label, .header-bar .suggested-action.titlebutton.button:backdrop:insensitive:checked > .label,
           .titlebar .suggested-action.titlebutton.button:backdrop:insensitive:checked > .label {
             color: inherit; }
@@ -804,17 +795,14 @@ GtkTextView {
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0.1); }
-      .button.suggested-action:insensitive > .label, .header-bar .suggested-action.button.titlebutton:insensitive > .label,
-      .titlebar .suggested-action.button.titlebutton:insensitive > .label {
+      .button.suggested-action:insensitive > .label {
         color: inherit; }
       .button.suggested-action:insensitive:active, .button.suggested-action:insensitive:checked {
         color: #a4b5c8;
         border-color: #0b1e33;
         background-image: linear-gradient(to bottom, #1b436f, #1d4876);
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0.1); }
-        .button.suggested-action:insensitive:active > .label, .header-bar .suggested-action.button.titlebutton:insensitive:active > .label,
-        .titlebar .suggested-action.button.titlebutton:insensitive:active > .label, .button.suggested-action:insensitive:checked > .label, .header-bar .suggested-action.button.titlebutton:insensitive:checked > .label,
-        .titlebar .suggested-action.button.titlebutton:insensitive:checked > .label {
+        .button.suggested-action:insensitive:active > .label, .button.suggested-action:insensitive:checked > .label {
           color: inherit; }
     .osd .button.suggested-action {
       color: #eeeeec;
@@ -916,8 +904,7 @@ GtkTextView {
         text-shadow: none;
         icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
-        .button.destructive-action:backdrop:insensitive > .label, .header-bar .destructive-action.button.titlebutton:backdrop:insensitive > .label,
-        .titlebar .destructive-action.button.titlebutton:backdrop:insensitive > .label, .button.destructive-action.flat:backdrop:insensitive > .label, .header-bar .destructive-action.titlebutton.button:backdrop:insensitive > .label,
+        .button.destructive-action:backdrop:insensitive > .label, .button.destructive-action.flat:backdrop:insensitive > .label, .header-bar .destructive-action.titlebutton.button:backdrop:insensitive > .label,
         .titlebar .destructive-action.titlebutton.button:backdrop:insensitive > .label {
           color: inherit; }
         .button.destructive-action:backdrop:insensitive:active, .button.destructive-action:backdrop:insensitive:checked, .button.destructive-action.flat:backdrop:insensitive:active, .header-bar .destructive-action.titlebutton.button:backdrop:insensitive:active,
@@ -927,9 +914,7 @@ GtkTextView {
           border-color: #5e0707;
           background-image: linear-gradient(to bottom, #a41111);
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
-          .button.destructive-action:backdrop:insensitive:active > .label, .header-bar .destructive-action.button.titlebutton:backdrop:insensitive:active > .label,
-          .titlebar .destructive-action.button.titlebutton:backdrop:insensitive:active > .label, .button.destructive-action:backdrop:insensitive:checked > .label, .header-bar .destructive-action.button.titlebutton:backdrop:insensitive:checked > .label,
-          .titlebar .destructive-action.button.titlebutton:backdrop:insensitive:checked > .label, .button.destructive-action.flat:backdrop:insensitive:active > .label, .header-bar .destructive-action.titlebutton.button:backdrop:insensitive:active > .label,
+          .button.destructive-action:backdrop:insensitive:active > .label, .button.destructive-action:backdrop:insensitive:checked > .label, .button.destructive-action.flat:backdrop:insensitive:active > .label, .header-bar .destructive-action.titlebutton.button:backdrop:insensitive:active > .label,
           .titlebar .destructive-action.titlebutton.button:backdrop:insensitive:active > .label, .button.destructive-action.flat:backdrop:insensitive:checked > .label, .header-bar .destructive-action.titlebutton.button:backdrop:insensitive:checked > .label,
           .titlebar .destructive-action.titlebutton.button:backdrop:insensitive:checked > .label {
             color: inherit; }
@@ -951,17 +936,14 @@ GtkTextView {
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0.1); }
-      .button.destructive-action:insensitive > .label, .header-bar .destructive-action.button.titlebutton:insensitive > .label,
-      .titlebar .destructive-action.button.titlebutton:insensitive > .label {
+      .button.destructive-action:insensitive > .label {
         color: inherit; }
       .button.destructive-action:insensitive:active, .button.destructive-action:insensitive:checked {
         color: #da9f9f;
         border-color: #5e0707;
         background-image: linear-gradient(to bottom, #9d1010, #a41111);
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0.1); }
-        .button.destructive-action:insensitive:active > .label, .header-bar .destructive-action.button.titlebutton:insensitive:active > .label,
-        .titlebar .destructive-action.button.titlebutton:insensitive:active > .label, .button.destructive-action:insensitive:checked > .label, .header-bar .destructive-action.button.titlebutton:insensitive:checked > .label,
-        .titlebar .destructive-action.button.titlebutton:insensitive:checked > .label {
+        .button.destructive-action:insensitive:active > .label, .button.destructive-action:insensitive:checked > .label {
           color: inherit; }
     .osd .button.destructive-action {
       color: #eeeeec;
@@ -1034,8 +1016,7 @@ GtkTextView {
       padding-right: 6px;
       padding-top: 3px;
       padding-bottom: 3px; }
-    .stack-switcher > .button.text-button, .header-bar .stack-switcher > .text-button.button.titlebutton,
-    .titlebar .stack-switcher > .text-button.button.titlebutton {
+    .stack-switcher > .button.text-button {
       padding: 5px 10px 6px; }
     .stack-switcher > .button.image-button, .header-bar .stack-switcher > .titlebutton.button,
     .titlebar .stack-switcher > .titlebutton.button {
@@ -1074,8 +1055,7 @@ GtkTextView {
   text-shadow: 0 -1px rgba(0, 0, 0, 0.81176);
   icon-shadow: 0 -1px rgba(0, 0, 0, 0.81176);
   box-shadow: inset 0 1px rgba(255, 255, 255, 0.1), 0 1px rgba(238, 238, 236, 0.1); }
-  .inline-toolbar GtkToolButton > .button:hover, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:hover,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:hover {
+  .inline-toolbar GtkToolButton > .button:hover {
     color: #eeeeec;
     outline-color: rgba(238, 238, 236, 0.3);
     border-color: #1c1f1f;
@@ -1083,9 +1063,7 @@ GtkTextView {
     text-shadow: 0 -1px rgba(0, 0, 0, 0.77976);
     icon-shadow: 0 -1px rgba(0, 0, 0, 0.77976);
     box-shadow: inset 0 1px rgba(255, 255, 255, 0.1), 0 1px rgba(238, 238, 236, 0.1); }
-  .inline-toolbar GtkToolButton > .button:active, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:active,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:active, .inline-toolbar GtkToolButton > .button:checked, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:checked,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:checked {
+  .inline-toolbar GtkToolButton > .button:active, .inline-toolbar GtkToolButton > .button:checked {
     color: #eeeeec;
     outline-color: rgba(238, 238, 236, 0.3);
     border-color: #1c1f1f;
@@ -1093,8 +1071,7 @@ GtkTextView {
     text-shadow: 0 -1px rgba(0, 0, 0, 0.89176);
     icon-shadow: 0 -1px rgba(0, 0, 0, 0.89176);
     box-shadow: inset 0 1px rgba(0, 0, 0, 0.07), inset 0 2px 1px -2px rgba(0, 0, 0, 0.6), 0 1px rgba(238, 238, 236, 0.1); }
-  .inline-toolbar GtkToolButton > .button:insensitive, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:insensitive,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:insensitive {
+  .inline-toolbar GtkToolButton > .button:insensitive {
     color: #939695;
     border-color: #1c1f1f;
     background-image: linear-gradient(to bottom, #323636);
@@ -1103,32 +1080,26 @@ GtkTextView {
     box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0.1); }
     .inline-toolbar GtkToolButton > .button:insensitive > .label {
       color: inherit; }
-  .inline-toolbar GtkToolButton > .button:insensitive:active, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:insensitive:active,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:insensitive:active, .inline-toolbar GtkToolButton > .button:insensitive:checked, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:insensitive:checked,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:insensitive:checked {
+  .inline-toolbar GtkToolButton > .button:insensitive:active, .inline-toolbar GtkToolButton > .button:insensitive:checked {
     color: #939695;
     border-color: #1c1f1f;
     background-image: linear-gradient(to bottom, #2f3333, #323636);
     box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0.1); }
     .inline-toolbar GtkToolButton > .button:insensitive:active > .label, .inline-toolbar GtkToolButton > .button:insensitive:checked > .label {
       color: inherit; }
-  .inline-toolbar GtkToolButton > .button:backdrop, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:backdrop,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:backdrop {
+  .inline-toolbar GtkToolButton > .button:backdrop {
     color: #939695;
     border-color: #1e2222;
     background-image: linear-gradient(to bottom, #393f3f);
     text-shadow: none;
     icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
-  .inline-toolbar GtkToolButton > .button:backdrop:active, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:backdrop:active,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:backdrop:active, .inline-toolbar GtkToolButton > .button:backdrop:checked, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:backdrop:checked,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:backdrop:checked {
+  .inline-toolbar GtkToolButton > .button:backdrop:active, .inline-toolbar GtkToolButton > .button:backdrop:checked {
     color: #939695;
     border-color: #1e2222;
     background-image: linear-gradient(to bottom, #2f3434);
     box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
-  .inline-toolbar GtkToolButton > .button:backdrop:insensitive, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:backdrop:insensitive,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:backdrop:insensitive {
+  .inline-toolbar GtkToolButton > .button:backdrop:insensitive {
     color: #5d6767;
     border-color: #1e2222;
     background-image: linear-gradient(to bottom, #323636);
@@ -1137,9 +1108,7 @@ GtkTextView {
     box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
     .inline-toolbar GtkToolButton > .button:backdrop:insensitive > .label {
       color: inherit; }
-  .inline-toolbar GtkToolButton > .button:backdrop:insensitive:active, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:backdrop:insensitive:active,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:backdrop:insensitive:active, .inline-toolbar GtkToolButton > .button:backdrop:insensitive:checked, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:backdrop:insensitive:checked,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:backdrop:insensitive:checked {
+  .inline-toolbar GtkToolButton > .button:backdrop:insensitive:active, .inline-toolbar GtkToolButton > .button:backdrop:insensitive:checked {
     color: #5d6767;
     border-color: #1e2222;
     background-image: linear-gradient(to bottom, #262929);
@@ -1178,14 +1147,12 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
   .inline-toolbar .header-bar GtkToolButton:backdrop:dir(rtl) > .button.titlebutton,
   .header-bar .inline-toolbar GtkToolButton:backdrop:dir(rtl) > .button.titlebutton,
   .inline-toolbar .titlebar GtkToolButton:backdrop:dir(rtl) > .button.titlebutton,
-  .titlebar .inline-toolbar GtkToolButton:backdrop:dir(rtl) > .button.titlebutton, .osd .button:dir(rtl):hover, .osd .button:dir(rtl):active, .osd .button:dir(rtl):checked, .osd .button:dir(rtl):insensitive, .osd .button:dir(rtl):backdrop, .osd .button.suggested-action:dir(rtl), .osd .button.destructive-action:dir(rtl), .inline-toolbar .button:dir(rtl), .linked > .button:dir(rtl), .header-bar .linked > .button.titlebutton:dir(rtl),
-  .titlebar .linked > .button.titlebutton:dir(rtl), GtkComboBox.combobox-entry .entry:dir(rtl), GtkComboBox.combobox-entry .button:dir(rtl), .linked > GtkComboBox > .button:dir(rtl) {
+  .titlebar .inline-toolbar GtkToolButton:backdrop:dir(rtl) > .button.titlebutton, .osd .button:dir(rtl):hover, .osd .button:dir(rtl):active, .osd .button:dir(rtl):checked, .osd .button:dir(rtl):insensitive, .osd .button:dir(rtl):backdrop, .osd .button.suggested-action:dir(rtl), .osd .button.destructive-action:dir(rtl), .inline-toolbar .button:dir(rtl), .linked > .button:dir(rtl), GtkComboBox.combobox-entry .entry:dir(rtl), GtkComboBox.combobox-entry .button:dir(rtl), .linked > GtkComboBox > .button:dir(rtl) {
     border-radius: 0;
     border-right-style: none;
     border-left-style: solid; }
 
-.osd .button:first-child:hover, .osd .button:first-child:active, .osd .button:first-child:checked, .osd .button:first-child:insensitive, .osd .button:first-child:backdrop, .osd .button.suggested-action:first-child, .osd .button.destructive-action:first-child, .inline-toolbar .button:first-child, .linked > .button:first-child, .header-bar .linked > .button.titlebutton:first-child,
-.titlebar .linked > .button.titlebutton:first-child, .inline-toolbar.toolbar GtkToolButton:first-child > .button.flat, .inline-toolbar GtkToolButton:first-child > .button.flat, .inline-toolbar.search-bar GtkToolButton:first-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:first-child > .button.flat, .inline-toolbar .header-bar GtkToolButton:first-child > .button.titlebutton, .header-bar .inline-toolbar GtkToolButton:first-child > .button.titlebutton,
+.osd .button:first-child:hover, .osd .button:first-child:active, .osd .button:first-child:checked, .osd .button:first-child:insensitive, .osd .button:first-child:backdrop, .osd .button.suggested-action:first-child, .osd .button.destructive-action:first-child, .inline-toolbar .button:first-child, .linked > .button:first-child, .inline-toolbar.toolbar GtkToolButton:first-child > .button.flat, .inline-toolbar GtkToolButton:first-child > .button.flat, .inline-toolbar.search-bar GtkToolButton:first-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:first-child > .button.flat, .inline-toolbar .header-bar GtkToolButton:first-child > .button.titlebutton, .header-bar .inline-toolbar GtkToolButton:first-child > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:first-child > .button.titlebutton,
 .titlebar .inline-toolbar GtkToolButton:first-child > .button.titlebutton,
 .inline-toolbar.toolbar GtkToolButton:backdrop:first-child > .button.flat,
@@ -1198,8 +1165,7 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
 .titlebar .inline-toolbar GtkToolButton:backdrop:first-child > .button.titlebutton, GtkComboBox.combobox-entry .entry:first-child, GtkComboBox.combobox-entry .button:first-child, .linked > GtkComboBox:first-child > .button {
   border-radius: 3px 0 0 3px;
   border-left-style: solid; }
-.osd .button:last-child:hover, .osd .button:last-child:active, .osd .button:last-child:checked, .osd .button:last-child:insensitive, .osd .button:last-child:backdrop, .osd .button.suggested-action:last-child, .osd .button.destructive-action:last-child, .inline-toolbar .button:last-child, .linked > .button:last-child, .header-bar .linked > .button.titlebutton:last-child,
-.titlebar .linked > .button.titlebutton:last-child, .inline-toolbar.toolbar GtkToolButton:last-child > .button.flat, .inline-toolbar GtkToolButton:last-child > .button.flat, .inline-toolbar.search-bar GtkToolButton:last-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:last-child > .button.flat, .inline-toolbar .header-bar GtkToolButton:last-child > .button.titlebutton, .header-bar .inline-toolbar GtkToolButton:last-child > .button.titlebutton,
+.osd .button:last-child:hover, .osd .button:last-child:active, .osd .button:last-child:checked, .osd .button:last-child:insensitive, .osd .button:last-child:backdrop, .osd .button.suggested-action:last-child, .osd .button.destructive-action:last-child, .inline-toolbar .button:last-child, .linked > .button:last-child, .inline-toolbar.toolbar GtkToolButton:last-child > .button.flat, .inline-toolbar GtkToolButton:last-child > .button.flat, .inline-toolbar.search-bar GtkToolButton:last-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:last-child > .button.flat, .inline-toolbar .header-bar GtkToolButton:last-child > .button.titlebutton, .header-bar .inline-toolbar GtkToolButton:last-child > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:last-child > .button.titlebutton,
 .titlebar .inline-toolbar GtkToolButton:last-child > .button.titlebutton,
 .inline-toolbar.toolbar GtkToolButton:backdrop:last-child > .button.flat,
@@ -1211,8 +1177,7 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:backdrop:last-child > .button.titlebutton,
 .titlebar .inline-toolbar GtkToolButton:backdrop:last-child > .button.titlebutton, GtkComboBox.combobox-entry .entry:last-child, GtkComboBox.combobox-entry .button:last-child, .linked > GtkComboBox:last-child > .button {
   border-radius: 0 3px 3px 0; }
-  .osd .button:last-child:dir(rtl):hover, .osd .button:last-child:dir(rtl):active, .osd .button:last-child:dir(rtl):checked, .osd .button:last-child:dir(rtl):insensitive, .osd .button:last-child:dir(rtl):backdrop, .osd .button.suggested-action:last-child:dir(rtl), .osd .button.destructive-action:last-child:dir(rtl), .inline-toolbar .button:last-child:dir(rtl), .linked > .button:last-child:dir(rtl), .header-bar .linked > .button.titlebutton:last-child:dir(rtl),
-  .titlebar .linked > .button.titlebutton:last-child:dir(rtl), .inline-toolbar GtkToolButton:last-child > .button.flat:dir(rtl), .inline-toolbar .header-bar GtkToolButton:last-child > .button.titlebutton:dir(rtl), .header-bar .inline-toolbar GtkToolButton:last-child > .button.titlebutton:dir(rtl),
+  .osd .button:last-child:dir(rtl):hover, .osd .button:last-child:dir(rtl):active, .osd .button:last-child:dir(rtl):checked, .osd .button:last-child:dir(rtl):insensitive, .osd .button:last-child:dir(rtl):backdrop, .osd .button.suggested-action:last-child:dir(rtl), .osd .button.destructive-action:last-child:dir(rtl), .inline-toolbar .button:last-child:dir(rtl), .linked > .button:last-child:dir(rtl), .inline-toolbar GtkToolButton:last-child > .button.flat:dir(rtl), .inline-toolbar .header-bar GtkToolButton:last-child > .button.titlebutton:dir(rtl), .header-bar .inline-toolbar GtkToolButton:last-child > .button.titlebutton:dir(rtl),
   .inline-toolbar .titlebar GtkToolButton:last-child > .button.titlebutton:dir(rtl),
   .titlebar .inline-toolbar GtkToolButton:last-child > .button.titlebutton:dir(rtl),
   .inline-toolbar GtkToolButton:backdrop:last-child > .button.flat:dir(rtl), .inline-toolbar.toolbar GtkToolButton:last-child:dir(rtl) > .button.flat, .inline-toolbar GtkToolButton:last-child:dir(rtl) > .button.flat, .inline-toolbar.search-bar GtkToolButton:last-child:dir(rtl) > .button.flat, .inline-toolbar.location-bar GtkToolButton:last-child:dir(rtl) > .button.flat, .inline-toolbar .header-bar GtkToolButton:last-child:dir(rtl) > .button.titlebutton, .header-bar .inline-toolbar GtkToolButton:last-child:dir(rtl) > .button.titlebutton,
@@ -1227,8 +1192,7 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
   .inline-toolbar .titlebar GtkToolButton:backdrop:last-child:dir(rtl) > .button.titlebutton,
   .titlebar .inline-toolbar GtkToolButton:backdrop:last-child:dir(rtl) > .button.titlebutton, GtkComboBox.combobox-entry .entry:last-child:dir(rtl), GtkComboBox.combobox-entry .button:last-child:dir(rtl), .linked > GtkComboBox:last-child > .button:dir(rtl) {
     border-right-style: solid; }
-.osd .button:only-child:hover, .osd .button:only-child:active, .osd .button:only-child:checked, .osd .button:only-child:insensitive, .osd .button:only-child:backdrop, .osd .button.suggested-action:only-child, .osd .button.destructive-action:only-child, .inline-toolbar .button:only-child, .linked > .button:only-child, .header-bar .linked > .button.titlebutton:only-child,
-.titlebar .linked > .button.titlebutton:only-child, .inline-toolbar.toolbar GtkToolButton:only-child > .button.flat, .inline-toolbar GtkToolButton:only-child > .button.flat, .inline-toolbar.search-bar GtkToolButton:only-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:only-child > .button.flat, .inline-toolbar .header-bar GtkToolButton:only-child > .button.titlebutton, .header-bar .inline-toolbar GtkToolButton:only-child > .button.titlebutton,
+.osd .button:only-child:hover, .osd .button:only-child:active, .osd .button:only-child:checked, .osd .button:only-child:insensitive, .osd .button:only-child:backdrop, .osd .button.suggested-action:only-child, .osd .button.destructive-action:only-child, .inline-toolbar .button:only-child, .linked > .button:only-child, .inline-toolbar.toolbar GtkToolButton:only-child > .button.flat, .inline-toolbar GtkToolButton:only-child > .button.flat, .inline-toolbar.search-bar GtkToolButton:only-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:only-child > .button.flat, .inline-toolbar .header-bar GtkToolButton:only-child > .button.titlebutton, .header-bar .inline-toolbar GtkToolButton:only-child > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:only-child > .button.titlebutton,
 .titlebar .inline-toolbar GtkToolButton:only-child > .button.titlebutton,
 .inline-toolbar.toolbar GtkToolButton:backdrop:only-child > .button.flat,
@@ -1242,24 +1206,20 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
   border-radius: 3px;
   border-style: solid; }
 
-.linked.vertical > .entry, .linked.vertical > .entry:focus, .linked.vertical > .entry:insensitive, .linked.vertical > .entry:insensitive:backdrop, .linked.vertical > .entry:backdrop, .linked.vertical > .button, .header-bar .linked.vertical > .button.titlebutton,
-.titlebar .linked.vertical > .button.titlebutton, .linked.vertical > .button:hover, .linked.vertical > .button:active, .linked.vertical > .button:checked, .linked.vertical > .button:backdrop, .linked.vertical > GtkComboBoxText > .button,
+.linked.vertical > .entry, .linked.vertical > .entry:focus, .linked.vertical > .entry:insensitive, .linked.vertical > .entry:insensitive:backdrop, .linked.vertical > .entry:backdrop, .linked.vertical > .button, .linked.vertical > .button:hover, .linked.vertical > .button:active, .linked.vertical > .button:checked, .linked.vertical > .button:backdrop, .linked.vertical > GtkComboBoxText > .button,
 .linked.vertical > GtkComboBox > .button {
   border-left-style: solid;
   border-top-style: none;
   border-radius: 0; }
 
-.linked.vertical > .entry:first-child, .linked.vertical > .button:first-child, .header-bar .linked.vertical > .button.titlebutton:first-child,
-.titlebar .linked.vertical > .button.titlebutton:first-child, .linked.vertical > GtkComboBoxText:first-child > .button,
+.linked.vertical > .entry:first-child, .linked.vertical > .button:first-child, .linked.vertical > GtkComboBoxText:first-child > .button,
 .linked.vertical > GtkComboBox:first-child > .button {
   border-style: solid;
   border-radius: 3px 3px 0 0; }
-.linked.vertical > .entry:last-child, .linked.vertical > .button:last-child, .header-bar .linked.vertical > .button.titlebutton:last-child,
-.titlebar .linked.vertical > .button.titlebutton:last-child, .linked.vertical > GtkComboBoxText:last-child > .button,
+.linked.vertical > .entry:last-child, .linked.vertical > .button:last-child, .linked.vertical > GtkComboBoxText:last-child > .button,
 .linked.vertical > GtkComboBox:last-child > .button {
   border-radius: 0 0 3px 3px; }
-.linked.vertical > .entry:only-child, .linked.vertical > .button:only-child, .header-bar .linked.vertical > .button.titlebutton:only-child,
-.titlebar .linked.vertical > .button.titlebutton:only-child, .linked.vertical > GtkComboBoxText:only-child > .button,
+.linked.vertical > .entry:only-child, .linked.vertical > .button:only-child, .linked.vertical > GtkComboBoxText:only-child > .button,
 .linked.vertical > GtkComboBox:only-child > .button {
   border-radius: 3px;
   border-style: solid; }
@@ -1470,9 +1430,7 @@ GtkColorButton.button, .header-bar GtkColorButton.button.titlebutton,
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-      .spinbutton.vertical .button:first-child:insensitive > .label, .spinbutton.vertical .header-bar .button.titlebutton:first-child:insensitive > .label,
-      .spinbutton.vertical .titlebar .button.titlebutton:first-child:insensitive > .label, .spinbutton.vertical:dir(rtl) .button:first-child:insensitive > .label, .spinbutton.vertical:dir(rtl) .header-bar .button.titlebutton:first-child:insensitive > .label,
-      .spinbutton.vertical:dir(rtl) .titlebar .button.titlebutton:first-child:insensitive > .label {
+      .spinbutton.vertical .button:first-child:insensitive > .label, .spinbutton.vertical:dir(rtl) .button:first-child:insensitive > .label {
         color: inherit; }
     .spinbutton.vertical .button:first-child:backdrop, .spinbutton.vertical:dir(rtl) .button:first-child:backdrop {
       color: #939695;
@@ -1512,9 +1470,7 @@ GtkColorButton.button, .header-bar GtkColorButton.button.titlebutton,
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0.1); }
-      .spinbutton.vertical .button:last-child:insensitive > .label, .spinbutton.vertical .header-bar .button.titlebutton:last-child:insensitive > .label,
-      .spinbutton.vertical .titlebar .button.titlebutton:last-child:insensitive > .label, .spinbutton.vertical:dir(rtl) .button:last-child:insensitive > .label, .spinbutton.vertical:dir(rtl) .header-bar .button.titlebutton:last-child:insensitive > .label,
-      .spinbutton.vertical:dir(rtl) .titlebar .button.titlebutton:last-child:insensitive > .label {
+      .spinbutton.vertical .button:last-child:insensitive > .label, .spinbutton.vertical:dir(rtl) .button:last-child:insensitive > .label {
         color: inherit; }
     .spinbutton.vertical .button:last-child:backdrop, .spinbutton.vertical:dir(rtl) .button:last-child:backdrop {
       color: #939695;
@@ -1530,9 +1486,7 @@ GtkColorButton.button, .header-bar GtkColorButton.button.titlebutton,
     text-shadow: none;
     icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(238, 238, 236, 0); }
-    .spinbutton.vertical .button:backdrop:insensitive > .label, .spinbutton.vertical .header-bar .button.titlebutton:backdrop:insensitive > .label,
-    .spinbutton.vertical .titlebar .button.titlebutton:backdrop:insensitive > .label, .spinbutton.vertical:dir(rtl) .button:backdrop:insensitive > .label, .spinbutton.vertical:dir(rtl) .header-bar .button.titlebutton:backdrop:insensitive > .label,
-    .spinbutton.vertical:dir(rtl) .titlebar .button.titlebutton:backdrop:insensitive > .label {
+    .spinbutton.vertical .button:backdrop:insensitive > .label, .spinbutton.vertical:dir(rtl) .button:backdrop:insensitive > .label {
       color: inherit; }
 .spinbutton.vertical.entry, .spinbutton.vertical:dir(rtl).entry {
   border-radius: 0;
@@ -1739,13 +1693,11 @@ GtkComboBox {
           icon-shadow: none;
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(43, 100, 160, 0);
           border-color: #0f2b48; }
-          .titlebar.selection-mode .button:backdrop:insensitive > .label, .titlebar.selection-mode .header-bar .button.titlebutton:backdrop:insensitive > .label, .titlebar.selection-mode .button.flat:backdrop:insensitive > .label, .titlebar.selection-mode .header-bar .titlebutton.button:backdrop:insensitive > .label,
+          .titlebar.selection-mode .button:backdrop:insensitive > .label, .titlebar.selection-mode .button.flat:backdrop:insensitive > .label,
           .titlebar.selection-mode .titlebutton.button:backdrop:insensitive > .label,
           .header-bar.selection-mode .button:backdrop:insensitive > .label,
-          .header-bar.selection-mode .titlebar .button.titlebutton:backdrop:insensitive > .label,
           .header-bar.selection-mode .button.flat:backdrop:insensitive > .label,
-          .header-bar.selection-mode .titlebutton.button:backdrop:insensitive > .label,
-          .header-bar.selection-mode .titlebar .titlebutton.button:backdrop:insensitive > .label {
+          .header-bar.selection-mode .titlebutton.button:backdrop:insensitive > .label {
             color: inherit; }
         .titlebar.selection-mode .button:backdrop:insensitive:active, .titlebar.selection-mode .button:backdrop:insensitive:checked, .titlebar.selection-mode .button.flat:backdrop:insensitive:active,
         .titlebar.selection-mode .titlebutton.button:backdrop:insensitive:active, .titlebar.selection-mode .button.flat:backdrop:insensitive:checked,
@@ -1761,19 +1713,15 @@ GtkComboBox {
           background-image: linear-gradient(to bottom, #1d4876);
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(43, 100, 160, 0);
           border-color: #0f2b48; }
-          .titlebar.selection-mode .button:backdrop:insensitive:active > .label, .titlebar.selection-mode .header-bar .button.titlebutton:backdrop:insensitive:active > .label, .titlebar.selection-mode .button:backdrop:insensitive:checked > .label, .titlebar.selection-mode .header-bar .button.titlebutton:backdrop:insensitive:checked > .label, .titlebar.selection-mode .button.flat:backdrop:insensitive:active > .label, .titlebar.selection-mode .header-bar .titlebutton.button:backdrop:insensitive:active > .label,
-          .titlebar.selection-mode .titlebutton.button:backdrop:insensitive:active > .label, .titlebar.selection-mode .button.flat:backdrop:insensitive:checked > .label, .titlebar.selection-mode .header-bar .titlebutton.button:backdrop:insensitive:checked > .label,
+          .titlebar.selection-mode .button:backdrop:insensitive:active > .label, .titlebar.selection-mode .button:backdrop:insensitive:checked > .label, .titlebar.selection-mode .button.flat:backdrop:insensitive:active > .label,
+          .titlebar.selection-mode .titlebutton.button:backdrop:insensitive:active > .label, .titlebar.selection-mode .button.flat:backdrop:insensitive:checked > .label,
           .titlebar.selection-mode .titlebutton.button:backdrop:insensitive:checked > .label,
           .header-bar.selection-mode .button:backdrop:insensitive:active > .label,
-          .header-bar.selection-mode .titlebar .button.titlebutton:backdrop:insensitive:active > .label,
           .header-bar.selection-mode .button:backdrop:insensitive:checked > .label,
-          .header-bar.selection-mode .titlebar .button.titlebutton:backdrop:insensitive:checked > .label,
           .header-bar.selection-mode .button.flat:backdrop:insensitive:active > .label,
           .header-bar.selection-mode .titlebutton.button:backdrop:insensitive:active > .label,
-          .header-bar.selection-mode .titlebar .titlebutton.button:backdrop:insensitive:active > .label,
           .header-bar.selection-mode .button.flat:backdrop:insensitive:checked > .label,
-          .header-bar.selection-mode .titlebutton.button:backdrop:insensitive:checked > .label,
-          .header-bar.selection-mode .titlebar .titlebutton.button:backdrop:insensitive:checked > .label {
+          .header-bar.selection-mode .titlebutton.button:backdrop:insensitive:checked > .label {
             color: inherit; }
       .titlebar.selection-mode .button.flat:backdrop,
       .titlebar.selection-mode .titlebutton.button:backdrop, .titlebar.selection-mode .button.flat:insensitive,
@@ -1799,9 +1747,8 @@ GtkComboBox {
         text-shadow: none;
         icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(43, 100, 160, 0.55); }
-        .titlebar.selection-mode .button:insensitive > .label, .titlebar.selection-mode .header-bar .button.titlebutton:insensitive > .label,
-        .header-bar.selection-mode .button:insensitive > .label,
-        .header-bar.selection-mode .titlebar .button.titlebutton:insensitive > .label {
+        .titlebar.selection-mode .button:insensitive > .label,
+        .header-bar.selection-mode .button:insensitive > .label {
           color: inherit; }
         .titlebar.selection-mode .button:insensitive:active, .titlebar.selection-mode .button:insensitive:checked,
         .header-bar.selection-mode .button:insensitive:active,
@@ -1810,11 +1757,9 @@ GtkComboBox {
           border-color: #0b1e33;
           background-image: linear-gradient(to bottom, #1b436f, #1d4876);
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(43, 100, 160, 0.55); }
-          .titlebar.selection-mode .button:insensitive:active > .label, .titlebar.selection-mode .header-bar .button.titlebutton:insensitive:active > .label, .titlebar.selection-mode .button:insensitive:checked > .label, .titlebar.selection-mode .header-bar .button.titlebutton:insensitive:checked > .label,
+          .titlebar.selection-mode .button:insensitive:active > .label, .titlebar.selection-mode .button:insensitive:checked > .label,
           .header-bar.selection-mode .button:insensitive:active > .label,
-          .header-bar.selection-mode .titlebar .button.titlebutton:insensitive:active > .label,
-          .header-bar.selection-mode .button:insensitive:checked > .label,
-          .header-bar.selection-mode .titlebar .button.titlebutton:insensitive:checked > .label {
+          .header-bar.selection-mode .button:insensitive:checked > .label {
             color: inherit; }
       .titlebar.selection-mode .button.suggested-action,
       .header-bar.selection-mode .button.suggested-action {
@@ -1855,9 +1800,8 @@ GtkComboBox {
           icon-shadow: none;
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(43, 100, 160, 0.55);
           border-color: #0f2b48; }
-          .titlebar.selection-mode .button.suggested-action:insensitive > .label, .titlebar.selection-mode .header-bar .suggested-action.button.titlebutton:insensitive > .label,
-          .header-bar.selection-mode .button.suggested-action:insensitive > .label,
-          .header-bar.selection-mode .titlebar .suggested-action.button.titlebutton:insensitive > .label {
+          .titlebar.selection-mode .button.suggested-action:insensitive > .label,
+          .header-bar.selection-mode .button.suggested-action:insensitive > .label {
             color: inherit; }
         .titlebar.selection-mode .button.suggested-action:backdrop,
         .header-bar.selection-mode .button.suggested-action:backdrop {
@@ -1877,9 +1821,8 @@ GtkComboBox {
           icon-shadow: none;
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(43, 100, 160, 0);
           border-color: #0f2b48; }
-          .titlebar.selection-mode .button.suggested-action:backdrop:insensitive > .label, .titlebar.selection-mode .header-bar .suggested-action.button.titlebutton:backdrop:insensitive > .label,
-          .header-bar.selection-mode .button.suggested-action:backdrop:insensitive > .label,
-          .header-bar.selection-mode .titlebar .suggested-action.button.titlebutton:backdrop:insensitive > .label {
+          .titlebar.selection-mode .button.suggested-action:backdrop:insensitive > .label,
+          .header-bar.selection-mode .button.suggested-action:backdrop:insensitive > .label {
             color: inherit; }
     .titlebar.selection-mode .selection-menu, .titlebar.selection-mode .selection-menu:backdrop,
     .header-bar.selection-mode .selection-menu,
@@ -3623,8 +3566,7 @@ GtkPlacesSidebar.sidebar .view .separator:backdrop {
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-      .list-row:selected .button:backdrop:insensitive > .label, .list-row:selected .header-bar .button.titlebutton:backdrop:insensitive > .label,
-      .list-row:selected .titlebar .button.titlebutton:backdrop:insensitive > .label, .list-row:selected .button.flat:backdrop:insensitive > .label, .list-row:selected .header-bar .titlebutton.button:backdrop:insensitive > .label, .header-bar .list-row:selected .titlebutton.button:backdrop:insensitive > .label,
+      .list-row:selected .button:backdrop:insensitive > .label, .list-row:selected .button.flat:backdrop:insensitive > .label, .list-row:selected .header-bar .titlebutton.button:backdrop:insensitive > .label, .header-bar .list-row:selected .titlebutton.button:backdrop:insensitive > .label,
       .list-row:selected .titlebar .titlebutton.button:backdrop:insensitive > .label,
       .titlebar .list-row:selected .titlebutton.button:backdrop:insensitive > .label {
         color: inherit; }
@@ -3637,9 +3579,7 @@ GtkPlacesSidebar.sidebar .view .separator:backdrop {
         border-color: #1e2222;
         background-image: linear-gradient(to bottom, #262929);
         box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-        .list-row:selected .button:backdrop:insensitive:active > .label, .list-row:selected .header-bar .button.titlebutton:backdrop:insensitive:active > .label,
-        .list-row:selected .titlebar .button.titlebutton:backdrop:insensitive:active > .label, .list-row:selected .button:backdrop:insensitive:checked > .label, .list-row:selected .header-bar .button.titlebutton:backdrop:insensitive:checked > .label,
-        .list-row:selected .titlebar .button.titlebutton:backdrop:insensitive:checked > .label, .list-row:selected .button.flat:backdrop:insensitive:active > .label, .list-row:selected .header-bar .titlebutton.button:backdrop:insensitive:active > .label, .header-bar .list-row:selected .titlebutton.button:backdrop:insensitive:active > .label,
+        .list-row:selected .button:backdrop:insensitive:active > .label, .list-row:selected .button:backdrop:insensitive:checked > .label, .list-row:selected .button.flat:backdrop:insensitive:active > .label, .list-row:selected .header-bar .titlebutton.button:backdrop:insensitive:active > .label, .header-bar .list-row:selected .titlebutton.button:backdrop:insensitive:active > .label,
         .list-row:selected .titlebar .titlebutton.button:backdrop:insensitive:active > .label,
         .titlebar .list-row:selected .titlebutton.button:backdrop:insensitive:active > .label, .list-row:selected .button.flat:backdrop:insensitive:checked > .label, .list-row:selected .header-bar .titlebutton.button:backdrop:insensitive:checked > .label, .header-bar .list-row:selected .titlebutton.button:backdrop:insensitive:checked > .label,
         .list-row:selected .titlebar .titlebutton.button:backdrop:insensitive:checked > .label,
@@ -3662,17 +3602,14 @@ GtkPlacesSidebar.sidebar .view .separator:backdrop {
     text-shadow: none;
     icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-    .list-row:selected .button:insensitive > .label, .list-row:selected .header-bar .button.titlebutton:insensitive > .label,
-    .list-row:selected .titlebar .button.titlebutton:insensitive > .label {
+    .list-row:selected .button:insensitive > .label {
       color: inherit; }
     .list-row:selected .button:insensitive:active, .list-row:selected .button:insensitive:checked {
       color: #939695;
       border-color: #1c1f1f;
       background-image: linear-gradient(to bottom, #2f3333, #323636);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-      .list-row:selected .button:insensitive:active > .label, .list-row:selected .header-bar .button.titlebutton:insensitive:active > .label,
-      .list-row:selected .titlebar .button.titlebutton:insensitive:active > .label, .list-row:selected .button:insensitive:checked > .label, .list-row:selected .header-bar .button.titlebutton:insensitive:checked > .label,
-      .list-row:selected .titlebar .button.titlebutton:insensitive:checked > .label {
+      .list-row:selected .button:insensitive:active > .label, .list-row:selected .button:insensitive:checked > .label {
         color: inherit; }
 
 .list-row, list-row.button, .header-bar list-row.button.titlebutton,
@@ -3846,8 +3783,7 @@ GtkCalendar {
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-      .message-dialog.csd .dialog-action-area .button:insensitive > .label, .message-dialog.csd .dialog-action-area .header-bar .button.titlebutton:insensitive > .label,
-      .message-dialog.csd .dialog-action-area .titlebar .button.titlebutton:insensitive > .label {
+      .message-dialog.csd .dialog-action-area .button:insensitive > .label {
         color: inherit; }
     .message-dialog.csd .dialog-action-area .button:backdrop {
       color: #939695;
@@ -3863,8 +3799,7 @@ GtkCalendar {
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-      .message-dialog.csd .dialog-action-area .button:backdrop:insensitive > .label, .message-dialog.csd .dialog-action-area .header-bar .button.titlebutton:backdrop:insensitive > .label,
-      .message-dialog.csd .dialog-action-area .titlebar .button.titlebutton:backdrop:insensitive > .label {
+      .message-dialog.csd .dialog-action-area .button:backdrop:insensitive > .label {
         color: inherit; }
     .message-dialog.csd .dialog-action-area .button.suggested-action {
       color: white;
@@ -3904,8 +3839,7 @@ GtkCalendar {
           text-shadow: none;
           icon-shadow: none;
           box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-          .message-dialog.csd .dialog-action-area .button.suggested-action:backdrop:insensitive > .label, .message-dialog.csd .dialog-action-area .header-bar .suggested-action.button.titlebutton:backdrop:insensitive > .label,
-          .message-dialog.csd .dialog-action-area .titlebar .suggested-action.button.titlebutton:backdrop:insensitive > .label {
+          .message-dialog.csd .dialog-action-area .button.suggested-action:backdrop:insensitive > .label {
             color: inherit; }
       .message-dialog.csd .dialog-action-area .button.suggested-action:insensitive {
         color: #939695;
@@ -3914,8 +3848,7 @@ GtkCalendar {
         text-shadow: none;
         icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-        .message-dialog.csd .dialog-action-area .button.suggested-action:insensitive > .label, .message-dialog.csd .dialog-action-area .header-bar .suggested-action.button.titlebutton:insensitive > .label,
-        .message-dialog.csd .dialog-action-area .titlebar .suggested-action.button.titlebutton:insensitive > .label {
+        .message-dialog.csd .dialog-action-area .button.suggested-action:insensitive > .label {
           color: inherit; }
     .message-dialog.csd .dialog-action-area .button.destructive-action {
       color: white;
@@ -3955,8 +3888,7 @@ GtkCalendar {
           text-shadow: none;
           icon-shadow: none;
           box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-          .message-dialog.csd .dialog-action-area .button.destructive-action:backdrop:insensitive > .label, .message-dialog.csd .dialog-action-area .header-bar .destructive-action.button.titlebutton:backdrop:insensitive > .label,
-          .message-dialog.csd .dialog-action-area .titlebar .destructive-action.button.titlebutton:backdrop:insensitive > .label {
+          .message-dialog.csd .dialog-action-area .button.destructive-action:backdrop:insensitive > .label {
             color: inherit; }
       .message-dialog.csd .dialog-action-area .button.destructive-action:insensitive {
         color: #939695;
@@ -3965,8 +3897,7 @@ GtkCalendar {
         text-shadow: none;
         icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-        .message-dialog.csd .dialog-action-area .button.destructive-action:insensitive > .label, .message-dialog.csd .dialog-action-area .header-bar .destructive-action.button.titlebutton:insensitive > .label,
-        .message-dialog.csd .dialog-action-area .titlebar .destructive-action.button.titlebutton:insensitive > .label {
+        .message-dialog.csd .dialog-action-area .button.destructive-action:insensitive > .label {
           color: inherit; }
   .message-dialog.csd .dialog-action-area .button, .message-dialog.csd .dialog-action-area .button:hover, .message-dialog.csd .dialog-action-area .button:active, .message-dialog.csd .dialog-action-area .button:insensitive, .message-dialog.csd .dialog-action-area .button:backdrop, .message-dialog.csd .dialog-action-area .button:backdrop:insensitive, .message-dialog.csd .dialog-action-area .button.suggested-action, .message-dialog.csd .dialog-action-area .button.suggested-action:hover, .message-dialog.csd .dialog-action-area .button.suggested-action:active, .message-dialog.csd .dialog-action-area .button.suggested-action:backdrop, .message-dialog.csd .dialog-action-area .button.suggested-action:backdrop:insensitive, .message-dialog.csd .dialog-action-area .button.suggested-action:insensitive, .message-dialog.csd .dialog-action-area .button.destructive-action, .message-dialog.csd .dialog-action-area .button.destructive-action:hover, .message-dialog.csd .dialog-action-area .button.destructive-action:active, .message-dialog.csd .dialog-action-area .button.destructive-action:backdrop, .message-dialog.csd .dialog-action-area .button.destructive-action:backdrop:insensitive, .message-dialog.csd .dialog-action-area .button.destructive-action:insensitive {
     border-left-style: solid;
@@ -4120,17 +4051,10 @@ GtkInfoBar {
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-      .info .button:insensitive > .label, .info .header-bar .button.titlebutton:insensitive > .label,
-      .info .titlebar .button.titlebutton:insensitive > .label,
+      .info .button:insensitive > .label,
       .question .button:insensitive > .label,
-      .question .header-bar .button.titlebutton:insensitive > .label,
-      .question .titlebar .button.titlebutton:insensitive > .label,
       .warning .button:insensitive > .label,
-      .warning .header-bar .button.titlebutton:insensitive > .label,
-      .warning .titlebar .button.titlebutton:insensitive > .label,
-      .error .button:insensitive > .label,
-      .error .header-bar .button.titlebutton:insensitive > .label,
-      .error .titlebar .button.titlebutton:insensitive > .label {
+      .error .button:insensitive > .label {
         color: inherit; }
     .info .button:backdrop,
     .question .button:backdrop,
@@ -4154,17 +4078,10 @@ GtkInfoBar {
         icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0);
         border-color: #0b1e33; }
-        .info .button:backdrop:insensitive > .label, .info .header-bar .button.titlebutton:backdrop:insensitive > .label,
-        .info .titlebar .button.titlebutton:backdrop:insensitive > .label,
+        .info .button:backdrop:insensitive > .label,
         .question .button:backdrop:insensitive > .label,
-        .question .header-bar .button.titlebutton:backdrop:insensitive > .label,
-        .question .titlebar .button.titlebutton:backdrop:insensitive > .label,
         .warning .button:backdrop:insensitive > .label,
-        .warning .header-bar .button.titlebutton:backdrop:insensitive > .label,
-        .warning .titlebar .button.titlebutton:backdrop:insensitive > .label,
-        .error .button:backdrop:insensitive > .label,
-        .error .header-bar .button.titlebutton:backdrop:insensitive > .label,
-        .error .titlebar .button.titlebutton:backdrop:insensitive > .label {
+        .error .button:backdrop:insensitive > .label {
           color: inherit; }
   .info .label:selected,
   .info .label:selected:focus,
@@ -4319,7 +4236,7 @@ GtkVolumeButton.button, .header-bar GtkVolumeButton.button.titlebutton,
     box-shadow: none; }
   .window-frame.ssd {
     box-shadow: 0 0 0 1px rgba(28, 31, 31, 0.9); }
-  .window-frame.csd .popup {
+  .window-frame.csd.popup {
     border-radius: 0;
     box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(28, 31, 31, 0.8); }
   .window-frame.csd.tooltip {
diff --git a/gtk/theme/Adwaita/gtk-contained.css b/gtk/theme/Adwaita/gtk-contained.css
index bb575f695c..fa74563df2 100644
--- a/gtk/theme/Adwaita/gtk-contained.css
+++ b/gtk/theme/Adwaita/gtk-contained.css
@@ -482,8 +482,7 @@ GtkTextView {
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
-      .button:backdrop:insensitive > .label, .header-bar .button.titlebutton:backdrop:insensitive > .label,
-      .titlebar .button.titlebutton:backdrop:insensitive > .label, .button.flat:backdrop:insensitive > .label, .header-bar .titlebutton.button:backdrop:insensitive > .label,
+      .button:backdrop:insensitive > .label, .button.flat:backdrop:insensitive > .label, .header-bar .titlebutton.button:backdrop:insensitive > .label,
       .titlebar .titlebutton.button:backdrop:insensitive > .label {
         color: inherit; }
     .button:backdrop:insensitive:active, .button:backdrop:insensitive:checked, .button.flat:backdrop:insensitive:active, .header-bar .titlebutton.button:backdrop:insensitive:active,
@@ -493,9 +492,7 @@ GtkTextView {
       border-color: #a8a8a8;
       background-image: linear-gradient(to bottom, #e7e7e7);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
-      .button:backdrop:insensitive:active > .label, .header-bar .button.titlebutton:backdrop:insensitive:active > .label,
-      .titlebar .button.titlebutton:backdrop:insensitive:active > .label, .button:backdrop:insensitive:checked > .label, .header-bar .button.titlebutton:backdrop:insensitive:checked > .label,
-      .titlebar .button.titlebutton:backdrop:insensitive:checked > .label, .button.flat:backdrop:insensitive:active > .label, .header-bar .titlebutton.button:backdrop:insensitive:active > .label,
+      .button:backdrop:insensitive:active > .label, .button:backdrop:insensitive:checked > .label, .button.flat:backdrop:insensitive:active > .label, .header-bar .titlebutton.button:backdrop:insensitive:active > .label,
       .titlebar .titlebutton.button:backdrop:insensitive:active > .label, .button.flat:backdrop:insensitive:checked > .label, .header-bar .titlebutton.button:backdrop:insensitive:checked > .label,
       .titlebar .titlebutton.button:backdrop:insensitive:checked > .label {
         color: inherit; }
@@ -517,17 +514,14 @@ GtkTextView {
     text-shadow: none;
     icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px white; }
-    .button:insensitive > .label, .header-bar .button.titlebutton:insensitive > .label,
-    .titlebar .button.titlebutton:insensitive > .label {
+    .button:insensitive > .label {
       color: inherit; }
     .button:insensitive:active, .button:insensitive:checked {
       color: #8d9091;
       border-color: #a1a1a1;
       background-image: linear-gradient(to bottom, #ebebeb, #f4f4f4);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px white; }
-      .button:insensitive:active > .label, .header-bar .button.titlebutton:insensitive:active > .label,
-      .titlebar .button.titlebutton:insensitive:active > .label, .button:insensitive:checked > .label, .header-bar .button.titlebutton:insensitive:checked > .label,
-      .titlebar .button.titlebutton:insensitive:checked > .label {
+      .button:insensitive:active > .label, .button:insensitive:checked > .label {
         color: inherit; }
   .button.osd, .header-bar .osd.button.titlebutton,
   .titlebar .osd.button.titlebutton {
@@ -769,8 +763,7 @@ GtkTextView {
         text-shadow: none;
         icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
-        .button.suggested-action:backdrop:insensitive > .label, .header-bar .suggested-action.button.titlebutton:backdrop:insensitive > .label,
-        .titlebar .suggested-action.button.titlebutton:backdrop:insensitive > .label, .button.suggested-action.flat:backdrop:insensitive > .label, .header-bar .suggested-action.titlebutton.button:backdrop:insensitive > .label,
+        .button.suggested-action:backdrop:insensitive > .label, .button.suggested-action.flat:backdrop:insensitive > .label, .header-bar .suggested-action.titlebutton.button:backdrop:insensitive > .label,
         .titlebar .suggested-action.titlebutton.button:backdrop:insensitive > .label {
           color: inherit; }
         .button.suggested-action:backdrop:insensitive:active, .button.suggested-action:backdrop:insensitive:checked, .button.suggested-action.flat:backdrop:insensitive:active, .header-bar .suggested-action.titlebutton.button:backdrop:insensitive:active,
@@ -780,9 +773,7 @@ GtkTextView {
           border-color: #5093da;
           background-image: linear-gradient(to bottom, #5093da);
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
-          .button.suggested-action:backdrop:insensitive:active > .label, .header-bar .suggested-action.button.titlebutton:backdrop:insensitive:active > .label,
-          .titlebar .suggested-action.button.titlebutton:backdrop:insensitive:active > .label, .button.suggested-action:backdrop:insensitive:checked > .label, .header-bar .suggested-action.button.titlebutton:backdrop:insensitive:checked > .label,
-          .titlebar .suggested-action.button.titlebutton:backdrop:insensitive:checked > .label, .button.suggested-action.flat:backdrop:insensitive:active > .label, .header-bar .suggested-action.titlebutton.button:backdrop:insensitive:active > .label,
+          .button.suggested-action:backdrop:insensitive:active > .label, .button.suggested-action:backdrop:insensitive:checked > .label, .button.suggested-action.flat:backdrop:insensitive:active > .label, .header-bar .suggested-action.titlebutton.button:backdrop:insensitive:active > .label,
           .titlebar .suggested-action.titlebutton.button:backdrop:insensitive:active > .label, .button.suggested-action.flat:backdrop:insensitive:checked > .label, .header-bar .suggested-action.titlebutton.button:backdrop:insensitive:checked > .label,
           .titlebar .suggested-action.titlebutton.button:backdrop:insensitive:checked > .label {
             color: inherit; }
@@ -804,17 +795,14 @@ GtkTextView {
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px white; }
-      .button.suggested-action:insensitive > .label, .header-bar .suggested-action.button.titlebutton:insensitive > .label,
-      .titlebar .suggested-action.button.titlebutton:insensitive > .label {
+      .button.suggested-action:insensitive > .label {
         color: inherit; }
       .button.suggested-action:insensitive:active, .button.suggested-action:insensitive:checked {
         color: #b9d3f0;
         border-color: #1c5187;
         background-image: linear-gradient(to bottom, #4a8cd1, #5093da);
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px white; }
-        .button.suggested-action:insensitive:active > .label, .header-bar .suggested-action.button.titlebutton:insensitive:active > .label,
-        .titlebar .suggested-action.button.titlebutton:insensitive:active > .label, .button.suggested-action:insensitive:checked > .label, .header-bar .suggested-action.button.titlebutton:insensitive:checked > .label,
-        .titlebar .suggested-action.button.titlebutton:insensitive:checked > .label {
+        .button.suggested-action:insensitive:active > .label, .button.suggested-action:insensitive:checked > .label {
           color: inherit; }
     .osd .button.suggested-action {
       color: #eeeeec;
@@ -916,8 +904,7 @@ GtkTextView {
         text-shadow: none;
         icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
-        .button.destructive-action:backdrop:insensitive > .label, .header-bar .destructive-action.button.titlebutton:backdrop:insensitive > .label,
-        .titlebar .destructive-action.button.titlebutton:backdrop:insensitive > .label, .button.destructive-action.flat:backdrop:insensitive > .label, .header-bar .destructive-action.titlebutton.button:backdrop:insensitive > .label,
+        .button.destructive-action:backdrop:insensitive > .label, .button.destructive-action.flat:backdrop:insensitive > .label, .header-bar .destructive-action.titlebutton.button:backdrop:insensitive > .label,
         .titlebar .destructive-action.titlebutton.button:backdrop:insensitive > .label {
           color: inherit; }
         .button.destructive-action:backdrop:insensitive:active, .button.destructive-action:backdrop:insensitive:checked, .button.destructive-action.flat:backdrop:insensitive:active, .header-bar .destructive-action.titlebutton.button:backdrop:insensitive:active,
@@ -927,9 +914,7 @@ GtkTextView {
           border-color: #ef3131;
           background-image: linear-gradient(to bottom, #ef3131);
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
-          .button.destructive-action:backdrop:insensitive:active > .label, .header-bar .destructive-action.button.titlebutton:backdrop:insensitive:active > .label,
-          .titlebar .destructive-action.button.titlebutton:backdrop:insensitive:active > .label, .button.destructive-action:backdrop:insensitive:checked > .label, .header-bar .destructive-action.button.titlebutton:backdrop:insensitive:checked > .label,
-          .titlebar .destructive-action.button.titlebutton:backdrop:insensitive:checked > .label, .button.destructive-action.flat:backdrop:insensitive:active > .label, .header-bar .destructive-action.titlebutton.button:backdrop:insensitive:active > .label,
+          .button.destructive-action:backdrop:insensitive:active > .label, .button.destructive-action:backdrop:insensitive:checked > .label, .button.destructive-action.flat:backdrop:insensitive:active > .label, .header-bar .destructive-action.titlebutton.button:backdrop:insensitive:active > .label,
           .titlebar .destructive-action.titlebutton.button:backdrop:insensitive:active > .label, .button.destructive-action.flat:backdrop:insensitive:checked > .label, .header-bar .destructive-action.titlebutton.button:backdrop:insensitive:checked > .label,
           .titlebar .destructive-action.titlebutton.button:backdrop:insensitive:checked > .label {
             color: inherit; }
@@ -951,17 +936,14 @@ GtkTextView {
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px white; }
-      .button.destructive-action:insensitive > .label, .header-bar .destructive-action.button.titlebutton:insensitive > .label,
-      .titlebar .destructive-action.button.titlebutton:insensitive > .label {
+      .button.destructive-action:insensitive > .label {
         color: inherit; }
       .button.destructive-action:insensitive:active, .button.destructive-action:insensitive:checked {
         color: #f8acac;
         border-color: #8e0b0b;
         background-image: linear-gradient(to bottom, #e52d2d, #ef3131);
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px white; }
-        .button.destructive-action:insensitive:active > .label, .header-bar .destructive-action.button.titlebutton:insensitive:active > .label,
-        .titlebar .destructive-action.button.titlebutton:insensitive:active > .label, .button.destructive-action:insensitive:checked > .label, .header-bar .destructive-action.button.titlebutton:insensitive:checked > .label,
-        .titlebar .destructive-action.button.titlebutton:insensitive:checked > .label {
+        .button.destructive-action:insensitive:active > .label, .button.destructive-action:insensitive:checked > .label {
           color: inherit; }
     .osd .button.destructive-action {
       color: #eeeeec;
@@ -1034,8 +1016,7 @@ GtkTextView {
       padding-right: 6px;
       padding-top: 3px;
       padding-bottom: 3px; }
-    .stack-switcher > .button.text-button, .header-bar .stack-switcher > .text-button.button.titlebutton,
-    .titlebar .stack-switcher > .text-button.button.titlebutton {
+    .stack-switcher > .button.text-button {
       padding: 5px 10px 6px; }
     .stack-switcher > .button.image-button, .header-bar .stack-switcher > .titlebutton.button,
     .titlebar .stack-switcher > .titlebutton.button {
@@ -1074,8 +1055,7 @@ GtkTextView {
   text-shadow: 0 1px rgba(255, 255, 255, 0.76923);
   icon-shadow: 0 1px rgba(255, 255, 255, 0.76923);
   box-shadow: inset 0 1px white, 0 1px white; }
-  .inline-toolbar GtkToolButton > .button:hover, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:hover,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:hover {
+  .inline-toolbar GtkToolButton > .button:hover {
     color: #2e3436;
     outline-color: rgba(46, 52, 54, 0.3);
     border-color: #a1a1a1;
@@ -1083,9 +1063,7 @@ GtkTextView {
     text-shadow: 0 1px rgba(255, 255, 255, 0.76923);
     icon-shadow: 0 1px rgba(255, 255, 255, 0.76923);
     box-shadow: inset 0 1px white, 0 1px white; }
-  .inline-toolbar GtkToolButton > .button:active, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:active,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:active, .inline-toolbar GtkToolButton > .button:checked, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:checked,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:checked {
+  .inline-toolbar GtkToolButton > .button:active, .inline-toolbar GtkToolButton > .button:checked {
     color: #2e3436;
     outline-color: rgba(46, 52, 54, 0.3);
     border-color: #a1a1a1;
@@ -1093,8 +1071,7 @@ GtkTextView {
     text-shadow: 0 1px rgba(255, 255, 255, 0.76923);
     icon-shadow: 0 1px rgba(255, 255, 255, 0.76923);
     box-shadow: inset 0 1px rgba(0, 0, 0, 0.07), inset 0 2px 1px -2px rgba(0, 0, 0, 0.6), 0 1px white; }
-  .inline-toolbar GtkToolButton > .button:insensitive, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:insensitive,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:insensitive {
+  .inline-toolbar GtkToolButton > .button:insensitive {
     color: #8d9091;
     border-color: #a1a1a1;
     background-image: linear-gradient(to bottom, #f4f4f4);
@@ -1103,32 +1080,26 @@ GtkTextView {
     box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px white; }
     .inline-toolbar GtkToolButton > .button:insensitive > .label {
       color: inherit; }
-  .inline-toolbar GtkToolButton > .button:insensitive:active, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:insensitive:active,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:insensitive:active, .inline-toolbar GtkToolButton > .button:insensitive:checked, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:insensitive:checked,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:insensitive:checked {
+  .inline-toolbar GtkToolButton > .button:insensitive:active, .inline-toolbar GtkToolButton > .button:insensitive:checked {
     color: #8d9091;
     border-color: #a1a1a1;
     background-image: linear-gradient(to bottom, #ebebeb, #f4f4f4);
     box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px white; }
     .inline-toolbar GtkToolButton > .button:insensitive:active > .label, .inline-toolbar GtkToolButton > .button:insensitive:checked > .label {
       color: inherit; }
-  .inline-toolbar GtkToolButton > .button:backdrop, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:backdrop,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:backdrop {
+  .inline-toolbar GtkToolButton > .button:backdrop {
     color: #8d9091;
     border-color: #a8a8a8;
     background-image: linear-gradient(to bottom, #ededed);
     text-shadow: none;
     icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
-  .inline-toolbar GtkToolButton > .button:backdrop:active, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:backdrop:active,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:backdrop:active, .inline-toolbar GtkToolButton > .button:backdrop:checked, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:backdrop:checked,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:backdrop:checked {
+  .inline-toolbar GtkToolButton > .button:backdrop:active, .inline-toolbar GtkToolButton > .button:backdrop:checked {
     color: #8d9091;
     border-color: #a8a8a8;
     background-image: linear-gradient(to bottom, #d4d4d4);
     box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
-  .inline-toolbar GtkToolButton > .button:backdrop:insensitive, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:backdrop:insensitive,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:backdrop:insensitive {
+  .inline-toolbar GtkToolButton > .button:backdrop:insensitive {
     color: #c7c7c7;
     border-color: #a8a8a8;
     background-image: linear-gradient(to bottom, #f4f4f4);
@@ -1137,9 +1108,7 @@ GtkTextView {
     box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
     .inline-toolbar GtkToolButton > .button:backdrop:insensitive > .label {
       color: inherit; }
-  .inline-toolbar GtkToolButton > .button:backdrop:insensitive:active, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:backdrop:insensitive:active,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:backdrop:insensitive:active, .inline-toolbar GtkToolButton > .button:backdrop:insensitive:checked, .inline-toolbar .header-bar GtkToolButton > .button.titlebutton:backdrop:insensitive:checked,
-  .inline-toolbar .titlebar GtkToolButton > .button.titlebutton:backdrop:insensitive:checked {
+  .inline-toolbar GtkToolButton > .button:backdrop:insensitive:active, .inline-toolbar GtkToolButton > .button:backdrop:insensitive:checked {
     color: #c7c7c7;
     border-color: #a8a8a8;
     background-image: linear-gradient(to bottom, #e7e7e7);
@@ -1178,14 +1147,12 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
   .inline-toolbar .header-bar GtkToolButton:backdrop:dir(rtl) > .button.titlebutton,
   .header-bar .inline-toolbar GtkToolButton:backdrop:dir(rtl) > .button.titlebutton,
   .inline-toolbar .titlebar GtkToolButton:backdrop:dir(rtl) > .button.titlebutton,
-  .titlebar .inline-toolbar GtkToolButton:backdrop:dir(rtl) > .button.titlebutton, .osd .button:dir(rtl):hover, .osd .button:dir(rtl):active, .osd .button:dir(rtl):checked, .osd .button:dir(rtl):insensitive, .osd .button:dir(rtl):backdrop, .osd .button.suggested-action:dir(rtl), .osd .button.destructive-action:dir(rtl), .inline-toolbar .button:dir(rtl), .linked > .button:dir(rtl), .header-bar .linked > .button.titlebutton:dir(rtl),
-  .titlebar .linked > .button.titlebutton:dir(rtl), GtkComboBox.combobox-entry .entry:dir(rtl), GtkComboBox.combobox-entry .button:dir(rtl), .linked > GtkComboBox > .button:dir(rtl) {
+  .titlebar .inline-toolbar GtkToolButton:backdrop:dir(rtl) > .button.titlebutton, .osd .button:dir(rtl):hover, .osd .button:dir(rtl):active, .osd .button:dir(rtl):checked, .osd .button:dir(rtl):insensitive, .osd .button:dir(rtl):backdrop, .osd .button.suggested-action:dir(rtl), .osd .button.destructive-action:dir(rtl), .inline-toolbar .button:dir(rtl), .linked > .button:dir(rtl), GtkComboBox.combobox-entry .entry:dir(rtl), GtkComboBox.combobox-entry .button:dir(rtl), .linked > GtkComboBox > .button:dir(rtl) {
     border-radius: 0;
     border-right-style: none;
     border-left-style: solid; }
 
-.osd .button:first-child:hover, .osd .button:first-child:active, .osd .button:first-child:checked, .osd .button:first-child:insensitive, .osd .button:first-child:backdrop, .osd .button.suggested-action:first-child, .osd .button.destructive-action:first-child, .inline-toolbar .button:first-child, .linked > .button:first-child, .header-bar .linked > .button.titlebutton:first-child,
-.titlebar .linked > .button.titlebutton:first-child, .inline-toolbar.toolbar GtkToolButton:first-child > .button.flat, .inline-toolbar GtkToolButton:first-child > .button.flat, .inline-toolbar.search-bar GtkToolButton:first-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:first-child > .button.flat, .inline-toolbar .header-bar GtkToolButton:first-child > .button.titlebutton, .header-bar .inline-toolbar GtkToolButton:first-child > .button.titlebutton,
+.osd .button:first-child:hover, .osd .button:first-child:active, .osd .button:first-child:checked, .osd .button:first-child:insensitive, .osd .button:first-child:backdrop, .osd .button.suggested-action:first-child, .osd .button.destructive-action:first-child, .inline-toolbar .button:first-child, .linked > .button:first-child, .inline-toolbar.toolbar GtkToolButton:first-child > .button.flat, .inline-toolbar GtkToolButton:first-child > .button.flat, .inline-toolbar.search-bar GtkToolButton:first-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:first-child > .button.flat, .inline-toolbar .header-bar GtkToolButton:first-child > .button.titlebutton, .header-bar .inline-toolbar GtkToolButton:first-child > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:first-child > .button.titlebutton,
 .titlebar .inline-toolbar GtkToolButton:first-child > .button.titlebutton,
 .inline-toolbar.toolbar GtkToolButton:backdrop:first-child > .button.flat,
@@ -1198,8 +1165,7 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
 .titlebar .inline-toolbar GtkToolButton:backdrop:first-child > .button.titlebutton, GtkComboBox.combobox-entry .entry:first-child, GtkComboBox.combobox-entry .button:first-child, .linked > GtkComboBox:first-child > .button {
   border-radius: 3px 0 0 3px;
   border-left-style: solid; }
-.osd .button:last-child:hover, .osd .button:last-child:active, .osd .button:last-child:checked, .osd .button:last-child:insensitive, .osd .button:last-child:backdrop, .osd .button.suggested-action:last-child, .osd .button.destructive-action:last-child, .inline-toolbar .button:last-child, .linked > .button:last-child, .header-bar .linked > .button.titlebutton:last-child,
-.titlebar .linked > .button.titlebutton:last-child, .inline-toolbar.toolbar GtkToolButton:last-child > .button.flat, .inline-toolbar GtkToolButton:last-child > .button.flat, .inline-toolbar.search-bar GtkToolButton:last-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:last-child > .button.flat, .inline-toolbar .header-bar GtkToolButton:last-child > .button.titlebutton, .header-bar .inline-toolbar GtkToolButton:last-child > .button.titlebutton,
+.osd .button:last-child:hover, .osd .button:last-child:active, .osd .button:last-child:checked, .osd .button:last-child:insensitive, .osd .button:last-child:backdrop, .osd .button.suggested-action:last-child, .osd .button.destructive-action:last-child, .inline-toolbar .button:last-child, .linked > .button:last-child, .inline-toolbar.toolbar GtkToolButton:last-child > .button.flat, .inline-toolbar GtkToolButton:last-child > .button.flat, .inline-toolbar.search-bar GtkToolButton:last-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:last-child > .button.flat, .inline-toolbar .header-bar GtkToolButton:last-child > .button.titlebutton, .header-bar .inline-toolbar GtkToolButton:last-child > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:last-child > .button.titlebutton,
 .titlebar .inline-toolbar GtkToolButton:last-child > .button.titlebutton,
 .inline-toolbar.toolbar GtkToolButton:backdrop:last-child > .button.flat,
@@ -1211,8 +1177,7 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:backdrop:last-child > .button.titlebutton,
 .titlebar .inline-toolbar GtkToolButton:backdrop:last-child > .button.titlebutton, GtkComboBox.combobox-entry .entry:last-child, GtkComboBox.combobox-entry .button:last-child, .linked > GtkComboBox:last-child > .button {
   border-radius: 0 3px 3px 0; }
-  .osd .button:last-child:dir(rtl):hover, .osd .button:last-child:dir(rtl):active, .osd .button:last-child:dir(rtl):checked, .osd .button:last-child:dir(rtl):insensitive, .osd .button:last-child:dir(rtl):backdrop, .osd .button.suggested-action:last-child:dir(rtl), .osd .button.destructive-action:last-child:dir(rtl), .inline-toolbar .button:last-child:dir(rtl), .linked > .button:last-child:dir(rtl), .header-bar .linked > .button.titlebutton:last-child:dir(rtl),
-  .titlebar .linked > .button.titlebutton:last-child:dir(rtl), .inline-toolbar GtkToolButton:last-child > .button.flat:dir(rtl), .inline-toolbar .header-bar GtkToolButton:last-child > .button.titlebutton:dir(rtl), .header-bar .inline-toolbar GtkToolButton:last-child > .button.titlebutton:dir(rtl),
+  .osd .button:last-child:dir(rtl):hover, .osd .button:last-child:dir(rtl):active, .osd .button:last-child:dir(rtl):checked, .osd .button:last-child:dir(rtl):insensitive, .osd .button:last-child:dir(rtl):backdrop, .osd .button.suggested-action:last-child:dir(rtl), .osd .button.destructive-action:last-child:dir(rtl), .inline-toolbar .button:last-child:dir(rtl), .linked > .button:last-child:dir(rtl), .inline-toolbar GtkToolButton:last-child > .button.flat:dir(rtl), .inline-toolbar .header-bar GtkToolButton:last-child > .button.titlebutton:dir(rtl), .header-bar .inline-toolbar GtkToolButton:last-child > .button.titlebutton:dir(rtl),
   .inline-toolbar .titlebar GtkToolButton:last-child > .button.titlebutton:dir(rtl),
   .titlebar .inline-toolbar GtkToolButton:last-child > .button.titlebutton:dir(rtl),
   .inline-toolbar GtkToolButton:backdrop:last-child > .button.flat:dir(rtl), .inline-toolbar.toolbar GtkToolButton:last-child:dir(rtl) > .button.flat, .inline-toolbar GtkToolButton:last-child:dir(rtl) > .button.flat, .inline-toolbar.search-bar GtkToolButton:last-child:dir(rtl) > .button.flat, .inline-toolbar.location-bar GtkToolButton:last-child:dir(rtl) > .button.flat, .inline-toolbar .header-bar GtkToolButton:last-child:dir(rtl) > .button.titlebutton, .header-bar .inline-toolbar GtkToolButton:last-child:dir(rtl) > .button.titlebutton,
@@ -1227,8 +1192,7 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
   .inline-toolbar .titlebar GtkToolButton:backdrop:last-child:dir(rtl) > .button.titlebutton,
   .titlebar .inline-toolbar GtkToolButton:backdrop:last-child:dir(rtl) > .button.titlebutton, GtkComboBox.combobox-entry .entry:last-child:dir(rtl), GtkComboBox.combobox-entry .button:last-child:dir(rtl), .linked > GtkComboBox:last-child > .button:dir(rtl) {
     border-right-style: solid; }
-.osd .button:only-child:hover, .osd .button:only-child:active, .osd .button:only-child:checked, .osd .button:only-child:insensitive, .osd .button:only-child:backdrop, .osd .button.suggested-action:only-child, .osd .button.destructive-action:only-child, .inline-toolbar .button:only-child, .linked > .button:only-child, .header-bar .linked > .button.titlebutton:only-child,
-.titlebar .linked > .button.titlebutton:only-child, .inline-toolbar.toolbar GtkToolButton:only-child > .button.flat, .inline-toolbar GtkToolButton:only-child > .button.flat, .inline-toolbar.search-bar GtkToolButton:only-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:only-child > .button.flat, .inline-toolbar .header-bar GtkToolButton:only-child > .button.titlebutton, .header-bar .inline-toolbar GtkToolButton:only-child > .button.titlebutton,
+.osd .button:only-child:hover, .osd .button:only-child:active, .osd .button:only-child:checked, .osd .button:only-child:insensitive, .osd .button:only-child:backdrop, .osd .button.suggested-action:only-child, .osd .button.destructive-action:only-child, .inline-toolbar .button:only-child, .linked > .button:only-child, .inline-toolbar.toolbar GtkToolButton:only-child > .button.flat, .inline-toolbar GtkToolButton:only-child > .button.flat, .inline-toolbar.search-bar GtkToolButton:only-child > .button.flat, .inline-toolbar.location-bar GtkToolButton:only-child > .button.flat, .inline-toolbar .header-bar GtkToolButton:only-child > .button.titlebutton, .header-bar .inline-toolbar GtkToolButton:only-child > .button.titlebutton,
 .inline-toolbar .titlebar GtkToolButton:only-child > .button.titlebutton,
 .titlebar .inline-toolbar GtkToolButton:only-child > .button.titlebutton,
 .inline-toolbar.toolbar GtkToolButton:backdrop:only-child > .button.flat,
@@ -1242,24 +1206,20 @@ GtkComboBox.combobox-entry .titlebar .button.titlebutton,
   border-radius: 3px;
   border-style: solid; }
 
-.linked.vertical > .entry, .linked.vertical > .entry:focus, .linked.vertical > .entry:insensitive, .linked.vertical > .entry:insensitive:backdrop, .linked.vertical > .entry:backdrop, .linked.vertical > .button, .header-bar .linked.vertical > .button.titlebutton,
-.titlebar .linked.vertical > .button.titlebutton, .linked.vertical > .button:hover, .linked.vertical > .button:active, .linked.vertical > .button:checked, .linked.vertical > .button:backdrop, .linked.vertical > GtkComboBoxText > .button,
+.linked.vertical > .entry, .linked.vertical > .entry:focus, .linked.vertical > .entry:insensitive, .linked.vertical > .entry:insensitive:backdrop, .linked.vertical > .entry:backdrop, .linked.vertical > .button, .linked.vertical > .button:hover, .linked.vertical > .button:active, .linked.vertical > .button:checked, .linked.vertical > .button:backdrop, .linked.vertical > GtkComboBoxText > .button,
 .linked.vertical > GtkComboBox > .button {
   border-left-style: solid;
   border-top-style: none;
   border-radius: 0; }
 
-.linked.vertical > .entry:first-child, .linked.vertical > .button:first-child, .header-bar .linked.vertical > .button.titlebutton:first-child,
-.titlebar .linked.vertical > .button.titlebutton:first-child, .linked.vertical > GtkComboBoxText:first-child > .button,
+.linked.vertical > .entry:first-child, .linked.vertical > .button:first-child, .linked.vertical > GtkComboBoxText:first-child > .button,
 .linked.vertical > GtkComboBox:first-child > .button {
   border-style: solid;
   border-radius: 3px 3px 0 0; }
-.linked.vertical > .entry:last-child, .linked.vertical > .button:last-child, .header-bar .linked.vertical > .button.titlebutton:last-child,
-.titlebar .linked.vertical > .button.titlebutton:last-child, .linked.vertical > GtkComboBoxText:last-child > .button,
+.linked.vertical > .entry:last-child, .linked.vertical > .button:last-child, .linked.vertical > GtkComboBoxText:last-child > .button,
 .linked.vertical > GtkComboBox:last-child > .button {
   border-radius: 0 0 3px 3px; }
-.linked.vertical > .entry:only-child, .linked.vertical > .button:only-child, .header-bar .linked.vertical > .button.titlebutton:only-child,
-.titlebar .linked.vertical > .button.titlebutton:only-child, .linked.vertical > GtkComboBoxText:only-child > .button,
+.linked.vertical > .entry:only-child, .linked.vertical > .button:only-child, .linked.vertical > GtkComboBoxText:only-child > .button,
 .linked.vertical > GtkComboBox:only-child > .button {
   border-radius: 3px;
   border-style: solid; }
@@ -1470,9 +1430,7 @@ GtkColorButton.button, .header-bar GtkColorButton.button.titlebutton,
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-      .spinbutton.vertical .button:first-child:insensitive > .label, .spinbutton.vertical .header-bar .button.titlebutton:first-child:insensitive > .label,
-      .spinbutton.vertical .titlebar .button.titlebutton:first-child:insensitive > .label, .spinbutton.vertical:dir(rtl) .button:first-child:insensitive > .label, .spinbutton.vertical:dir(rtl) .header-bar .button.titlebutton:first-child:insensitive > .label,
-      .spinbutton.vertical:dir(rtl) .titlebar .button.titlebutton:first-child:insensitive > .label {
+      .spinbutton.vertical .button:first-child:insensitive > .label, .spinbutton.vertical:dir(rtl) .button:first-child:insensitive > .label {
         color: inherit; }
     .spinbutton.vertical .button:first-child:backdrop, .spinbutton.vertical:dir(rtl) .button:first-child:backdrop {
       color: #8d9091;
@@ -1512,9 +1470,7 @@ GtkColorButton.button, .header-bar GtkColorButton.button.titlebutton,
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px white; }
-      .spinbutton.vertical .button:last-child:insensitive > .label, .spinbutton.vertical .header-bar .button.titlebutton:last-child:insensitive > .label,
-      .spinbutton.vertical .titlebar .button.titlebutton:last-child:insensitive > .label, .spinbutton.vertical:dir(rtl) .button:last-child:insensitive > .label, .spinbutton.vertical:dir(rtl) .header-bar .button.titlebutton:last-child:insensitive > .label,
-      .spinbutton.vertical:dir(rtl) .titlebar .button.titlebutton:last-child:insensitive > .label {
+      .spinbutton.vertical .button:last-child:insensitive > .label, .spinbutton.vertical:dir(rtl) .button:last-child:insensitive > .label {
         color: inherit; }
     .spinbutton.vertical .button:last-child:backdrop, .spinbutton.vertical:dir(rtl) .button:last-child:backdrop {
       color: #8d9091;
@@ -1530,9 +1486,7 @@ GtkColorButton.button, .header-bar GtkColorButton.button.titlebutton,
     text-shadow: none;
     icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(255, 255, 255, 0); }
-    .spinbutton.vertical .button:backdrop:insensitive > .label, .spinbutton.vertical .header-bar .button.titlebutton:backdrop:insensitive > .label,
-    .spinbutton.vertical .titlebar .button.titlebutton:backdrop:insensitive > .label, .spinbutton.vertical:dir(rtl) .button:backdrop:insensitive > .label, .spinbutton.vertical:dir(rtl) .header-bar .button.titlebutton:backdrop:insensitive > .label,
-    .spinbutton.vertical:dir(rtl) .titlebar .button.titlebutton:backdrop:insensitive > .label {
+    .spinbutton.vertical .button:backdrop:insensitive > .label, .spinbutton.vertical:dir(rtl) .button:backdrop:insensitive > .label {
       color: inherit; }
 .spinbutton.vertical.entry, .spinbutton.vertical:dir(rtl).entry {
   border-radius: 0;
@@ -1739,13 +1693,11 @@ GtkComboBox {
           icon-shadow: none;
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(164, 199, 236, 0);
           border-color: #184472; }
-          .titlebar.selection-mode .button:backdrop:insensitive > .label, .titlebar.selection-mode .header-bar .button.titlebutton:backdrop:insensitive > .label, .titlebar.selection-mode .button.flat:backdrop:insensitive > .label, .titlebar.selection-mode .header-bar .titlebutton.button:backdrop:insensitive > .label,
+          .titlebar.selection-mode .button:backdrop:insensitive > .label, .titlebar.selection-mode .button.flat:backdrop:insensitive > .label,
           .titlebar.selection-mode .titlebutton.button:backdrop:insensitive > .label,
           .header-bar.selection-mode .button:backdrop:insensitive > .label,
-          .header-bar.selection-mode .titlebar .button.titlebutton:backdrop:insensitive > .label,
           .header-bar.selection-mode .button.flat:backdrop:insensitive > .label,
-          .header-bar.selection-mode .titlebutton.button:backdrop:insensitive > .label,
-          .header-bar.selection-mode .titlebar .titlebutton.button:backdrop:insensitive > .label {
+          .header-bar.selection-mode .titlebutton.button:backdrop:insensitive > .label {
             color: inherit; }
         .titlebar.selection-mode .button:backdrop:insensitive:active, .titlebar.selection-mode .button:backdrop:insensitive:checked, .titlebar.selection-mode .button.flat:backdrop:insensitive:active,
         .titlebar.selection-mode .titlebutton.button:backdrop:insensitive:active, .titlebar.selection-mode .button.flat:backdrop:insensitive:checked,
@@ -1761,19 +1713,15 @@ GtkComboBox {
           background-image: linear-gradient(to bottom, #5093da);
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(164, 199, 236, 0);
           border-color: #184472; }
-          .titlebar.selection-mode .button:backdrop:insensitive:active > .label, .titlebar.selection-mode .header-bar .button.titlebutton:backdrop:insensitive:active > .label, .titlebar.selection-mode .button:backdrop:insensitive:checked > .label, .titlebar.selection-mode .header-bar .button.titlebutton:backdrop:insensitive:checked > .label, .titlebar.selection-mode .button.flat:backdrop:insensitive:active > .label, .titlebar.selection-mode .header-bar .titlebutton.button:backdrop:insensitive:active > .label,
-          .titlebar.selection-mode .titlebutton.button:backdrop:insensitive:active > .label, .titlebar.selection-mode .button.flat:backdrop:insensitive:checked > .label, .titlebar.selection-mode .header-bar .titlebutton.button:backdrop:insensitive:checked > .label,
+          .titlebar.selection-mode .button:backdrop:insensitive:active > .label, .titlebar.selection-mode .button:backdrop:insensitive:checked > .label, .titlebar.selection-mode .button.flat:backdrop:insensitive:active > .label,
+          .titlebar.selection-mode .titlebutton.button:backdrop:insensitive:active > .label, .titlebar.selection-mode .button.flat:backdrop:insensitive:checked > .label,
           .titlebar.selection-mode .titlebutton.button:backdrop:insensitive:checked > .label,
           .header-bar.selection-mode .button:backdrop:insensitive:active > .label,
-          .header-bar.selection-mode .titlebar .button.titlebutton:backdrop:insensitive:active > .label,
           .header-bar.selection-mode .button:backdrop:insensitive:checked > .label,
-          .header-bar.selection-mode .titlebar .button.titlebutton:backdrop:insensitive:checked > .label,
           .header-bar.selection-mode .button.flat:backdrop:insensitive:active > .label,
           .header-bar.selection-mode .titlebutton.button:backdrop:insensitive:active > .label,
-          .header-bar.selection-mode .titlebar .titlebutton.button:backdrop:insensitive:active > .label,
           .header-bar.selection-mode .button.flat:backdrop:insensitive:checked > .label,
-          .header-bar.selection-mode .titlebutton.button:backdrop:insensitive:checked > .label,
-          .header-bar.selection-mode .titlebar .titlebutton.button:backdrop:insensitive:checked > .label {
+          .header-bar.selection-mode .titlebutton.button:backdrop:insensitive:checked > .label {
             color: inherit; }
       .titlebar.selection-mode .button.flat:backdrop,
       .titlebar.selection-mode .titlebutton.button:backdrop, .titlebar.selection-mode .button.flat:insensitive,
@@ -1799,9 +1747,8 @@ GtkComboBox {
         text-shadow: none;
         icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px #a4c7ec; }
-        .titlebar.selection-mode .button:insensitive > .label, .titlebar.selection-mode .header-bar .button.titlebutton:insensitive > .label,
-        .header-bar.selection-mode .button:insensitive > .label,
-        .header-bar.selection-mode .titlebar .button.titlebutton:insensitive > .label {
+        .titlebar.selection-mode .button:insensitive > .label,
+        .header-bar.selection-mode .button:insensitive > .label {
           color: inherit; }
         .titlebar.selection-mode .button:insensitive:active, .titlebar.selection-mode .button:insensitive:checked,
         .header-bar.selection-mode .button:insensitive:active,
@@ -1810,11 +1757,9 @@ GtkComboBox {
           border-color: #1c5187;
           background-image: linear-gradient(to bottom, #4a8cd1, #5093da);
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px #a4c7ec; }
-          .titlebar.selection-mode .button:insensitive:active > .label, .titlebar.selection-mode .header-bar .button.titlebutton:insensitive:active > .label, .titlebar.selection-mode .button:insensitive:checked > .label, .titlebar.selection-mode .header-bar .button.titlebutton:insensitive:checked > .label,
+          .titlebar.selection-mode .button:insensitive:active > .label, .titlebar.selection-mode .button:insensitive:checked > .label,
           .header-bar.selection-mode .button:insensitive:active > .label,
-          .header-bar.selection-mode .titlebar .button.titlebutton:insensitive:active > .label,
-          .header-bar.selection-mode .button:insensitive:checked > .label,
-          .header-bar.selection-mode .titlebar .button.titlebutton:insensitive:checked > .label {
+          .header-bar.selection-mode .button:insensitive:checked > .label {
             color: inherit; }
       .titlebar.selection-mode .button.suggested-action,
       .header-bar.selection-mode .button.suggested-action {
@@ -1855,9 +1800,8 @@ GtkComboBox {
           icon-shadow: none;
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px #a4c7ec;
           border-color: #184472; }
-          .titlebar.selection-mode .button.suggested-action:insensitive > .label, .titlebar.selection-mode .header-bar .suggested-action.button.titlebutton:insensitive > .label,
-          .header-bar.selection-mode .button.suggested-action:insensitive > .label,
-          .header-bar.selection-mode .titlebar .suggested-action.button.titlebutton:insensitive > .label {
+          .titlebar.selection-mode .button.suggested-action:insensitive > .label,
+          .header-bar.selection-mode .button.suggested-action:insensitive > .label {
             color: inherit; }
         .titlebar.selection-mode .button.suggested-action:backdrop,
         .header-bar.selection-mode .button.suggested-action:backdrop {
@@ -1877,9 +1821,8 @@ GtkComboBox {
           icon-shadow: none;
           box-shadow: inset 0 1px rgba(255, 255, 255, 0), 0 1px rgba(164, 199, 236, 0);
           border-color: #184472; }
-          .titlebar.selection-mode .button.suggested-action:backdrop:insensitive > .label, .titlebar.selection-mode .header-bar .suggested-action.button.titlebutton:backdrop:insensitive > .label,
-          .header-bar.selection-mode .button.suggested-action:backdrop:insensitive > .label,
-          .header-bar.selection-mode .titlebar .suggested-action.button.titlebutton:backdrop:insensitive > .label {
+          .titlebar.selection-mode .button.suggested-action:backdrop:insensitive > .label,
+          .header-bar.selection-mode .button.suggested-action:backdrop:insensitive > .label {
             color: inherit; }
     .titlebar.selection-mode .selection-menu, .titlebar.selection-mode .selection-menu:backdrop,
     .header-bar.selection-mode .selection-menu,
@@ -3791,8 +3734,7 @@ GtkPlacesSidebar.sidebar .view .separator:backdrop {
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0);
       border-color: #184472; }
-      .list-row:selected .button:backdrop:insensitive > .label, .list-row:selected .header-bar .button.titlebutton:backdrop:insensitive > .label,
-      .list-row:selected .titlebar .button.titlebutton:backdrop:insensitive > .label, .list-row:selected .button.flat:backdrop:insensitive > .label, .list-row:selected .header-bar .titlebutton.button:backdrop:insensitive > .label, .header-bar .list-row:selected .titlebutton.button:backdrop:insensitive > .label,
+      .list-row:selected .button:backdrop:insensitive > .label, .list-row:selected .button.flat:backdrop:insensitive > .label, .list-row:selected .header-bar .titlebutton.button:backdrop:insensitive > .label, .header-bar .list-row:selected .titlebutton.button:backdrop:insensitive > .label,
       .list-row:selected .titlebar .titlebutton.button:backdrop:insensitive > .label,
       .titlebar .list-row:selected .titlebutton.button:backdrop:insensitive > .label {
         color: inherit; }
@@ -3806,9 +3748,7 @@ GtkPlacesSidebar.sidebar .view .separator:backdrop {
         background-image: linear-gradient(to bottom, #e7e7e7);
         box-shadow: inset 0 1px rgba(255, 255, 255, 0);
         border-color: #184472; }
-        .list-row:selected .button:backdrop:insensitive:active > .label, .list-row:selected .header-bar .button.titlebutton:backdrop:insensitive:active > .label,
-        .list-row:selected .titlebar .button.titlebutton:backdrop:insensitive:active > .label, .list-row:selected .button:backdrop:insensitive:checked > .label, .list-row:selected .header-bar .button.titlebutton:backdrop:insensitive:checked > .label,
-        .list-row:selected .titlebar .button.titlebutton:backdrop:insensitive:checked > .label, .list-row:selected .button.flat:backdrop:insensitive:active > .label, .list-row:selected .header-bar .titlebutton.button:backdrop:insensitive:active > .label, .header-bar .list-row:selected .titlebutton.button:backdrop:insensitive:active > .label,
+        .list-row:selected .button:backdrop:insensitive:active > .label, .list-row:selected .button:backdrop:insensitive:checked > .label, .list-row:selected .button.flat:backdrop:insensitive:active > .label, .list-row:selected .header-bar .titlebutton.button:backdrop:insensitive:active > .label, .header-bar .list-row:selected .titlebutton.button:backdrop:insensitive:active > .label,
         .list-row:selected .titlebar .titlebutton.button:backdrop:insensitive:active > .label,
         .titlebar .list-row:selected .titlebutton.button:backdrop:insensitive:active > .label, .list-row:selected .button.flat:backdrop:insensitive:checked > .label, .list-row:selected .header-bar .titlebutton.button:backdrop:insensitive:checked > .label, .header-bar .list-row:selected .titlebutton.button:backdrop:insensitive:checked > .label,
         .list-row:selected .titlebar .titlebutton.button:backdrop:insensitive:checked > .label,
@@ -3832,17 +3772,14 @@ GtkPlacesSidebar.sidebar .view .separator:backdrop {
     icon-shadow: none;
     box-shadow: inset 0 1px rgba(255, 255, 255, 0);
     border-color: #184472; }
-    .list-row:selected .button:insensitive > .label, .list-row:selected .header-bar .button.titlebutton:insensitive > .label,
-    .list-row:selected .titlebar .button.titlebutton:insensitive > .label {
+    .list-row:selected .button:insensitive > .label {
       color: inherit; }
     .list-row:selected .button:insensitive:active, .list-row:selected .button:insensitive:checked {
       color: #8d9091;
       border-color: #a1a1a1;
       background-image: linear-gradient(to bottom, #ebebeb, #f4f4f4);
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-      .list-row:selected .button:insensitive:active > .label, .list-row:selected .header-bar .button.titlebutton:insensitive:active > .label,
-      .list-row:selected .titlebar .button.titlebutton:insensitive:active > .label, .list-row:selected .button:insensitive:checked > .label, .list-row:selected .header-bar .button.titlebutton:insensitive:checked > .label,
-      .list-row:selected .titlebar .button.titlebutton:insensitive:checked > .label {
+      .list-row:selected .button:insensitive:active > .label, .list-row:selected .button:insensitive:checked > .label {
         color: inherit; }
 
 .list-row, list-row.button, .header-bar list-row.button.titlebutton,
@@ -4018,8 +3955,7 @@ GtkCalendar {
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-      .message-dialog.csd .dialog-action-area .button:insensitive > .label, .message-dialog.csd .dialog-action-area .header-bar .button.titlebutton:insensitive > .label,
-      .message-dialog.csd .dialog-action-area .titlebar .button.titlebutton:insensitive > .label {
+      .message-dialog.csd .dialog-action-area .button:insensitive > .label {
         color: inherit; }
     .message-dialog.csd .dialog-action-area .button:backdrop {
       color: #8d9091;
@@ -4035,8 +3971,7 @@ GtkCalendar {
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-      .message-dialog.csd .dialog-action-area .button:backdrop:insensitive > .label, .message-dialog.csd .dialog-action-area .header-bar .button.titlebutton:backdrop:insensitive > .label,
-      .message-dialog.csd .dialog-action-area .titlebar .button.titlebutton:backdrop:insensitive > .label {
+      .message-dialog.csd .dialog-action-area .button:backdrop:insensitive > .label {
         color: inherit; }
     .message-dialog.csd .dialog-action-area .button.suggested-action {
       color: white;
@@ -4076,8 +4011,7 @@ GtkCalendar {
           text-shadow: none;
           icon-shadow: none;
           box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-          .message-dialog.csd .dialog-action-area .button.suggested-action:backdrop:insensitive > .label, .message-dialog.csd .dialog-action-area .header-bar .suggested-action.button.titlebutton:backdrop:insensitive > .label,
-          .message-dialog.csd .dialog-action-area .titlebar .suggested-action.button.titlebutton:backdrop:insensitive > .label {
+          .message-dialog.csd .dialog-action-area .button.suggested-action:backdrop:insensitive > .label {
             color: inherit; }
       .message-dialog.csd .dialog-action-area .button.suggested-action:insensitive {
         color: #8d9091;
@@ -4086,8 +4020,7 @@ GtkCalendar {
         text-shadow: none;
         icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-        .message-dialog.csd .dialog-action-area .button.suggested-action:insensitive > .label, .message-dialog.csd .dialog-action-area .header-bar .suggested-action.button.titlebutton:insensitive > .label,
-        .message-dialog.csd .dialog-action-area .titlebar .suggested-action.button.titlebutton:insensitive > .label {
+        .message-dialog.csd .dialog-action-area .button.suggested-action:insensitive > .label {
           color: inherit; }
     .message-dialog.csd .dialog-action-area .button.destructive-action {
       color: white;
@@ -4127,8 +4060,7 @@ GtkCalendar {
           text-shadow: none;
           icon-shadow: none;
           box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-          .message-dialog.csd .dialog-action-area .button.destructive-action:backdrop:insensitive > .label, .message-dialog.csd .dialog-action-area .header-bar .destructive-action.button.titlebutton:backdrop:insensitive > .label,
-          .message-dialog.csd .dialog-action-area .titlebar .destructive-action.button.titlebutton:backdrop:insensitive > .label {
+          .message-dialog.csd .dialog-action-area .button.destructive-action:backdrop:insensitive > .label {
             color: inherit; }
       .message-dialog.csd .dialog-action-area .button.destructive-action:insensitive {
         color: #8d9091;
@@ -4137,8 +4069,7 @@ GtkCalendar {
         text-shadow: none;
         icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-        .message-dialog.csd .dialog-action-area .button.destructive-action:insensitive > .label, .message-dialog.csd .dialog-action-area .header-bar .destructive-action.button.titlebutton:insensitive > .label,
-        .message-dialog.csd .dialog-action-area .titlebar .destructive-action.button.titlebutton:insensitive > .label {
+        .message-dialog.csd .dialog-action-area .button.destructive-action:insensitive > .label {
           color: inherit; }
   .message-dialog.csd .dialog-action-area .button, .message-dialog.csd .dialog-action-area .button:hover, .message-dialog.csd .dialog-action-area .button:active, .message-dialog.csd .dialog-action-area .button:insensitive, .message-dialog.csd .dialog-action-area .button:backdrop, .message-dialog.csd .dialog-action-area .button:backdrop:insensitive, .message-dialog.csd .dialog-action-area .button.suggested-action, .message-dialog.csd .dialog-action-area .button.suggested-action:hover, .message-dialog.csd .dialog-action-area .button.suggested-action:active, .message-dialog.csd .dialog-action-area .button.suggested-action:backdrop, .message-dialog.csd .dialog-action-area .button.suggested-action:backdrop:insensitive, .message-dialog.csd .dialog-action-area .button.suggested-action:insensitive, .message-dialog.csd .dialog-action-area .button.destructive-action, .message-dialog.csd .dialog-action-area .button.destructive-action:hover, .message-dialog.csd .dialog-action-area .button.destructive-action:active, .message-dialog.csd .dialog-action-area .button.destructive-action:backdrop, .message-dialog.csd .dialog-action-area .button.destructive-action:backdrop:insensitive, .message-dialog.csd .dialog-action-area .button.destructive-action:insensitive {
     border-left-style: solid;
@@ -4292,17 +4223,10 @@ GtkInfoBar {
       text-shadow: none;
       icon-shadow: none;
       box-shadow: inset 0 1px rgba(255, 255, 255, 0); }
-      .info .button:insensitive > .label, .info .header-bar .button.titlebutton:insensitive > .label,
-      .info .titlebar .button.titlebutton:insensitive > .label,
+      .info .button:insensitive > .label,
       .question .button:insensitive > .label,
-      .question .header-bar .button.titlebutton:insensitive > .label,
-      .question .titlebar .button.titlebutton:insensitive > .label,
       .warning .button:insensitive > .label,
-      .warning .header-bar .button.titlebutton:insensitive > .label,
-      .warning .titlebar .button.titlebutton:insensitive > .label,
-      .error .button:insensitive > .label,
-      .error .header-bar .button.titlebutton:insensitive > .label,
-      .error .titlebar .button.titlebutton:insensitive > .label {
+      .error .button:insensitive > .label {
         color: inherit; }
     .info .button:backdrop,
     .question .button:backdrop,
@@ -4326,17 +4250,10 @@ GtkInfoBar {
         icon-shadow: none;
         box-shadow: inset 0 1px rgba(255, 255, 255, 0);
         border-color: #1c5187; }
-        .info .button:backdrop:insensitive > .label, .info .header-bar .button.titlebutton:backdrop:insensitive > .label,
-        .info .titlebar .button.titlebutton:backdrop:insensitive > .label,
+        .info .button:backdrop:insensitive > .label,
         .question .button:backdrop:insensitive > .label,
-        .question .header-bar .button.titlebutton:backdrop:insensitive > .label,
-        .question .titlebar .button.titlebutton:backdrop:insensitive > .label,
         .warning .button:backdrop:insensitive > .label,
-        .warning .header-bar .button.titlebutton:backdrop:insensitive > .label,
-        .warning .titlebar .button.titlebutton:backdrop:insensitive > .label,
-        .error .button:backdrop:insensitive > .label,
-        .error .header-bar .button.titlebutton:backdrop:insensitive > .label,
-        .error .titlebar .button.titlebutton:backdrop:insensitive > .label {
+        .error .button:backdrop:insensitive > .label {
           color: inherit; }
   .info .label:selected,
   .info .label:selected:focus,
@@ -4491,7 +4408,7 @@ GtkVolumeButton.button, .header-bar GtkVolumeButton.button.titlebutton,
     box-shadow: none; }
   .window-frame.ssd {
     box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.23); }
-  .window-frame.csd .popup {
+  .window-frame.csd.popup {
     border-radius: 0;
     box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(0, 0, 0, 0.13); }
   .window-frame.csd.tooltip {