Auto update new upstream snapshot for GTK3

gtk/upstream/gtk-3.0/Mint-Y/sass/_applications.scss

@@ -842,7 +842,7 @@ MatePanelAppletFrameDBus > MatePanelAppletFrameDBus {
 
 // Xfce Panel
 .xfce4-panel.panel {
-  background-color: #393939;
+  background-color: $xfce_panel_bg;
   color: $panel_fg;
 
   button {
@@ -857,11 +857,11 @@ MatePanelAppletFrameDBus > MatePanelAppletFrameDBus {
   color: $panel_fg;
   border-radius: 0;
   border: none;
-  background-color: transparentize($panel_bg, 1);
+  background-color: transparentize($xfce_panel_bg, 1);
 
   &:hover {
     border: none;
-    background-color: lighten($panel_bg, 10%);
+    background-color: lighten($xfce_panel_bg, 10%);
   }
 
   &:active, &:checked {

gtk/upstream/gtk-3.0/Mint-Y/sass/_colors.scss

@@ -58,7 +58,7 @@ $wm_icon_hover_bg:      null;
 } @else {
     // Dark Variant Colors
     $opposite:              WHITE;
-    $base_color:            #2E2E33;
+    $base_color:            #333339;
     $text_color:            #DADADA;
     $header_bg:             #222226;
     $bg_color:              lighten($header_bg, 5%);
@@ -127,6 +127,12 @@ $tooltip_bg_color: transparentize(mix($selected_bg_color, black, 95%), 0.05);
 $tooltip_fg_color: #FFFFFF;
 $drop_target_color: $selected_bg_color;
 
+@if $variant == 'light' {
+    $button_active_bg: transparentize(black, 0.85);
+} @else {
+    $button_active_bg: transparentize(white, 0.85);
+}
+
 // Links and status
 $link_color: #5294E2;
 $link_visited_color: #5294E2;
@@ -140,8 +146,9 @@ $suggested_color: #6DB442;
 $question_color: #55C1EC;
 
 // Panel (MATE/Xfce)
-$panel_bg: #2F2F2F;
-$panel_fg: #DADADA;
+$xfce_panel_bg: #2e2e33;
+$panel_bg: #222226;
+$panel_fg: #e1e1e1;
 
 // Apps
 $terminal_bg: #222226;

gtk/upstream/gtk-3.0/Mint-Y/sass/_common.scss

@@ -894,7 +894,13 @@ toolbar {
   border-color: $borders_color;
   border-width: 0 1px 1px;
   padding: 3px;
-  border-radius: 0  0 3px 3px;
+  border-radius: 0 0 3px 3px;
+}
+
+.frame + .inline-toolbar,
+frame + .inline-toolbar {
+  margin-top: -3px;
+  padding-top: 6px;
 }
 
 searchbar {
@@ -1749,18 +1755,46 @@ notebook {
 
   &.frame {
     border: 1px solid $borders_color;
+    border-radius: 3px;
+    background-color: $bg_color;
 
     > header {
       // ugly hack to hide the borders around the header
       margin: -1px;
-      &.top { margin-bottom: 0; }
-      &.bottom { margin-top: 0; }
-      &.left { margin-right: 0; }
-      &.right { margin-left: 0; }
+      &.top {
+        margin-bottom: 0;
+        border-top-left-radius: 3px;
+        border-top-right-radius: 3px;
+        > tabs { border-top-left-radius: 3px; border-top-right-radius: 3px; }
+        > tabs > tab:first-child { border-top-left-radius: 3px; }
+        > tabs > tab:last-child  { border-top-right-radius: 3px; }
+      }
+      &.bottom {
+        margin-top: 0;
+        border-bottom-left-radius: 3px;
+        border-bottom-right-radius: 3px;
+        > tabs { border-bottom-left-radius: 3px; border-bottom-right-radius: 3px; }
+        > tabs > tab:first-child { border-bottom-left-radius: 3px; }
+        > tabs > tab:last-child  { border-bottom-right-radius: 3px; }
+      }
+      &.left {
+        margin-right: 0;
+        border-top-left-radius: 3px;
+        border-bottom-left-radius: 3px;
+      }
+      &.right {
+        margin-left: 0;
+        border-top-right-radius: 3px;
+        border-bottom-right-radius: 3px;
+      }
 
       &.top, &.bottom { padding-left: 0; padding-right: 0; }
       &.left, &.right { padding-top: 0; padding-bottom: 0; }
     }
+
+    > stack:not(:only-child) {
+      &:last-child { border-bottom-left-radius: 3px; border-bottom-right-radius: 3px; }
+    }
   }
 
   > stack:not(:only-child) { // the :not(:only-child) is for "hidden" notebooks
@@ -2382,11 +2416,16 @@ levelbar {
   }
 }
 
+frame {
+  border-radius: 3px;
+  background-color: $bg_color;
+}
+
 frame > border,
 .frame {
   margin: 0;
   padding: 0;
-  border-radius: 0;
+  border-radius: 3px;
   border: 1px solid $borders_color;
 }
 
@@ -2396,6 +2435,48 @@ frame > border.flat,
   border-style: none;
 }
 
+.sidebar.frame,
+.sidebar .frame,
+.sidebar frame,
+.sidebar frame > border,
+.sidebar scrolledwindow,
+.sidebar viewport,
+.sidebar .frame list,
+.sidebar .frame listbox,
+.sidebar .frame treeview,
+.sidebar .frame viewport,
+.sidebar frame list,
+.sidebar frame listbox,
+.sidebar frame treeview,
+.sidebar frame viewport {
+  border-radius: 0;
+  border: none;
+}
+
+frame list,
+frame listbox,
+frame treeview,
+frame scrolledwindow,
+frame viewport,
+.frame list,
+.frame listbox,
+.frame treeview,
+.frame viewport {
+  border-radius: 3px;
+}
+
+
+frame treeview.view header button:first-child,
+.frame treeview.view header button:first-child {
+  border-top-left-radius: 3px;
+}
+
+frame treeview.view header button:last-child,
+.frame treeview.view header button:last-child {
+  border-top-right-radius: 3px;
+}
+
+
 scrolledwindow {
   viewport.frame { // avoid double borders when viewport inside scrolled window
     border-style: none;
@@ -2623,6 +2704,18 @@ filechooserbutton:drop(active) {
   border-color: transparent;
 }
 
+//
+// PrintDialog
+//
+printdialog {
+  paper {
+    background-color: white;
+    color: $fg_color;
+    border: 1px solid $borders_color;
+    padding: 0;
+  }
+}
+
 //
 // Sidebar
 //

gtk/upstream/gtk-3.0/Mint-Y/sass/_ubiquity.scss

@@ -3,6 +3,6 @@
 //
 
 .ubiquity-menubar {
-  background-color: #3f3f3f;
+  background-color: #3f3f43;
   color: #eeeeee;
 }