diff --git a/gtk-3.0/gtk-widgets.css b/gtk-3.0/gtk-widgets.css
index d5a5132..31e2975 100644
--- a/gtk-3.0/gtk-widgets.css
+++ b/gtk-3.0/gtk-widgets.css
@@ -174,9 +174,6 @@ GtkAssistant .sidebar {
     -GtkWidget-focus-line-width: 0;
 
     padding: 3px 2px;
-}
-
-.button {
     border-width: 1px;
     border-style: solid;
     border-color: shade(@theme_bg_color, 0.8);
@@ -249,240 +246,6 @@ GtkAssistant .sidebar {
     color: shade(@theme_selected_fg_color, 0.9);
 }
 
-/* linked buttons */
-.linked .button,
-.toolbar .button.raised.linked,
-.toolbar .raised.linked .button,
-.inline-toolbar.toolbar .button,
-.inline-toolbar.toolbar GtkToolButton > .button {
-    box-shadow: inset -1px 0 shade(@theme_bg_color, 0.9);
-}
-
-.linked .button:active,
-.toolbar .button.raised.linked:active,
-.toolbar .raised.linked .button:active,
-.inline-toolbar.toolbar .button:active,
-.inline-toolbar.toolbar GtkToolButton > .button:active {
-    box-shadow: inset -1px 0 shade(@theme_bg_color, 0.9),
-                inset 1px 0 alpha(@dark_shadow, 0.07),
-                inset 0 1px alpha(@dark_shadow, 0.08),
-                inset 0 -1px alpha(@dark_shadow, 0.05);
-}
-
-.linked .button:insensitive,
-.toolbar .button.raised.linked:insensitive,
-.toolbar .raised.linked .button:insensitive,
-.inline-toolbar.toolbar .button:insensitive,
-.inline-toolbar.toolbar GtkToolButton > .button:insensitive {
-    box-shadow: inset -1px 0 shade(@theme_bg_color, 0.9);
-}
-
-/* remove box shadow from last-child and only-child */
-.linked .button:last-child,
-.toolbar .button.raised.linked:last-child,
-.toolbar .raised.linked .button:last-child,
-.inline-toolbar.toolbar .button:last-child,
-.inline-toolbar.toolbar GtkToolButton:last-child > .button,
-.linked .button:only-child,
-.toolbar .button.raised.linked:only-child,
-.toolbar .raised.linked .button:only-child,
-.inline-toolbar.toolbar .button:only-child,
-.inline-toolbar.toolbar GtkToolButton:only-child > .button,
-.linked .button:insensitive:last-child,
-.toolbar .button:insensitive.raised.linked:last-child,
-.toolbar .raised.linked .button:insensitive:last-child,
-.inline-toolbar.toolbar .button:insensitive:last-child,
-.inline-toolbar.toolbar GtkToolButton:last-child > .button:insensitive,
-.linked .button:insensitive:only-child,
-.toolbar .button:insensitive.raised.linked:only-child,
-.toolbar .raised.linked .button:insensitive:only-child,
-.inline-toolbar.toolbar .button:insensitive:only-child,
-.inline-toolbar.toolbar GtkToolButton:only-child > .button:insensitive {
-    box-shadow: none;
-}
-
-/* add back the inset shadow effect */
-.linked .button:active:last-child,
-.toolbar .button:active.raised.linked:last-child,
-.toolbar .raised.linked .button:active:last-child,
-.inline-toolbar.toolbar .button:active:last-child,
-.inline-toolbar.toolbar GtkToolButton:last-child > .button:active,
-.linked .button:active:only-child,
-.toolbar .button:active.raised.linked:only-child,
-.toolbar .raised.linked .button:active:only-child,
-.inline-toolbar.toolbar .button:active:only-child,
-.inline-toolbar.toolbar GtkToolButton:only-child > .button:active {
-    box-shadow: inset 1px 0 alpha(@dark_shadow, 0.07),
-                inset 0 1px alpha(@dark_shadow, 0.08),
-                inset -1px 0 alpha(@dark_shadow, 0.07),
-                inset 0 -1px alpha(@dark_shadow, 0.05);
-}
-
-/* middle button */
-.linked .entry,
-.linked .button,
-.linked .button:active,
-.linked .button:active:hover,
-.linked .button:insensitive {
-    border-width: 1px;
-    border-radius: 0;
-    border-right-width: 0;
-    border-left-width: 0;
-}
-
-/* leftmost button */
-.linked .entry:first-child,
-.linked .button:first-child,
-.linked .button:active:first-child,
-.linked .button:active:hover:first-child,
-.linked .button:insensitive:first-child {
-    border-width: 1px;
-    border-radius: 2px;
-    border-right-width: 0;
-    border-bottom-right-radius: 0;
-    border-top-right-radius: 0;
-}
-
-/* rightmost button */
-.linked .entry:last-child,
-.linked .button:last-child,
-.linked .button:active:last-child,
-.linked .button:active:hover:last-child,
-.linked .button:insensitive:last-child {
-    border-width: 1px;
-    border-radius: 2px;
-    border-left-width: 0;
-    border-bottom-left-radius: 0;
-    border-top-left-radius: 0;
-}
-
-/* linked single button */
-.linked .entry:only-child,
-.linked .button:only-child,
-.linked .button:active:only-child,
-.linked .button:active:hover:only-child,
-.linked .button:insensitive:only-child {
-    border-width: 1px;
-    border-radius: 2px;
-}
-
-/* middle button (vertical) */
-.linked.vertical .entry,
-.linked.vertical .button,
-.linked.vertical .button:active,
-.linked.vertical .button:active:hover,
-.linked.vertical .button:insensitive {
-    border-width: 1px;
-    border-radius: 0;
-    border-top-width: 0;
-    border-bottom-width: 0;
-}
-
-/* top button (vertical) */
-.linked.vertical .entry:first-child,
-.linked.vertical .button:first-child,
-.linked.vertical .button:active:first-child,
-.linked.vertical .button:active:hover:first-child,
-.linked.vertical .button:insensitive:first-child {
-    border-width: 1px;
-    border-radius: 2px;
-    border-bottom-width: 0;
-    border-bottom-right-radius: 0;
-    border-bottom-left-radius: 0;
-}
-
-/* bottom button (vertical) */
-.linked.vertical .entry:last-child,
-.linked.vertical .button:last-child,
-.linked.vertical .button:active:last-child,
-.linked.vertical .button:active:hover:last-child,
-.linked.vertical .button:insensitive:last-child {
-    border-width: 1px;
-    border-radius: 2px;
-    border-top-width: 0;
-    border-top-left-radius: 0;
-    border-top-right-radius: 0;
-}
-
-/* linked single button (vertical) */
-.linked.vertical .entry:only-child,
-.linked.vertical .button:only-child,
-.linked.vertical .button:active:only-child,
-.linked.vertical .button:active:hover:only-child,
-.linked.vertical .button:insensitive:only-child {
-    border-width: 1px;
-    border-radius: 2px;
-}
-
-/* linked button shadows (vertical) */
-.linked.vertical .button,
-.toolbar.vertical .button.raised.linked,
-.toolbar.vertical .raised.linked .button,
-.inline-toolbar.toolbar.vertical .button,
-.inline-toolbar.toolbar.vertical GtkToolButton > .button {
-    box-shadow: inset 0 -1px shade(@theme_bg_color, 0.9);
-}
-
-.linked.vertical .button:active,
-.toolbar.vertical .button.raised.linked:active,
-.toolbar.vertical .raised.linked .button:active,
-.inline-toolbar.toolbar.vertical .button:active,
-.inline-toolbar.toolbar.vertical GtkToolButton > .button:active {
-    box-shadow: inset 0 -1px shade(@theme_bg_color, 0.9),
-                inset 0 1px alpha(@dark_shadow, 0.08),
-                inset 1px 0 alpha(@dark_shadow, 0.07),
-                inset 0 1px alpha(@dark_shadow, 0.08);
-}
-
-.linked.vertical .button:insensitive,
-.toolbar.vertical .button.raised.linked:insensitive,
-.toolbar.vertical .raised.linked .button:insensitive,
-.inline-toolbar.toolbar.vertical .button:insensitive,
-.inline-toolbar.toolbar.vertical GtkToolButton > .button:insensitive {
-    box-shadow: inset 0 -1px shade(@theme_bg_color, 0.9);
-}
-
-/* remove box shadow from last-child and only-child */
-.linked.vertical .button:last-child,
-.toolbar.vertical .button.raised.linked:last-child,
-.toolbar.vertical .raised.linked .button:last-child,
-.inline-toolbar.toolbar.vertical .button:last-child,
-.inline-toolbar.toolbar.vertical GtkToolButton:last-child > .button,
-.linked.vertical .button:only-child,
-.toolbar.vertical .button.raised.linked:only-child,
-.toolbar.vertical .raised.linked .button:only-child,
-.inline-toolbar.toolbar.vertical .button:only-child,
-.inline-toolbar.toolbar.vertical GtkToolButton:only-child > .button,
-.linked.vertical .button:insensitive:last-child,
-.toolbar.vertical .button:insensitive.raised.linked:last-child,
-.toolbar.vertical .raised.linked .button:insensitive:last-child,
-.inline-toolbar.toolbar.vertical .button:insensitive:last-child,
-.inline-toolbar.toolbar.vertical GtkToolButton:last-child > .button:insensitive,
-.linked.vertical .button:insensitive:only-child,
-.toolbar.vertical .button:insensitive.raised.linked:only-child,
-.toolbar.vertical .raised.linked .button:insensitive:only-child,
-.inline-toolbar.toolbar.vertical .button:insensitive:only-child,
-.inline-toolbar.toolbar.vertical GtkToolButton:only-child > .button:insensitive {
-    box-shadow: none;
-}
-
-/* add back the inset shadow effect */
-.linked.vertical .button:active:last-child,
-.toolbar.vertical .button:active.raised.linked:last-child,
-.toolbar.vertical .raised.linked .button:active:last-child,
-.inline-toolbar.toolbar.vertical .button:active:last-child,
-.inline-toolbar.toolbar.vertical GtkToolButton:last-child > .button:active,
-.linked.vertical .button:active:only-child,
-.toolbar.vertical .button:active.raised.linked:only-child,
-.toolbar.vertical .raised.linked .button:active:only-child,
-.inline-toolbar.toolbar.vertical .button:active:only-child,
-.inline-toolbar.toolbar.vertical GtkToolButton:only-child > .button:active {
-    box-shadow: inset 1px 0 alpha(@dark_shadow, 0.07),
-                inset 0 1px alpha(@dark_shadow, 0.08),
-                inset -1px 0 alpha(@dark_shadow, 0.07),
-                inset 0 -1px alpha(@dark_shadow, 0.05);
-}
-
 /****************
  * cell and row *
  ****************/
@@ -1056,16 +819,16 @@ GtkTreeMenu .menuitem * {
     background-image: none;
 }
 
-.menuitem.arrow {
-    color: alpha(@menu_fg_color, 0.6);
-}
-
 .menuitem.check:active,
 .menuitem.radio:active {
     border-style: none;
     background-color: transparent;
 }
 
+.menuitem.arrow {
+    color: alpha(@menu_fg_color, 0.6);
+}
+
 .menuitem GtkCalendar:inconsistent {
     color: mix(@menu_fg_color, @menu_bg_color, 0.5);
 }
@@ -2108,78 +1871,74 @@ GtkColorButton.button {
     background-image: none;
 }
 
-/* linked buttons */
-.primary-toolbar .button.raised.linked,
-.primary-toolbar .raised.linked .button,
+/******************
+ * linked buttons *
+ *****************/
+/* set up shadows for visual separation */
+.linked .button,
 .inline-toolbar.toolbar .button,
-.inline-toolbar.toolbar GtkToolButton .button {
+.inline-toolbar.toolbar GtkToolButton .button,
+.inline-toolbar.toolbar GtkToolButton > .button {
     box-shadow: inset -1px 0 shade(@theme_bg_color, 0.9);
 }
 
-.primary-toolbar .button.raised.linked:active,
-.primary-toolbar .raised.linked .button:active,
+.linked .button:active,
 .inline-toolbar.toolbar .button:active,
-.inline-toolbar.toolbar GtkToolButton .button:active {
+.inline-toolbar.toolbar GtkToolButton .button:active,
+.inline-toolbar.toolbar GtkToolButton > .button:active {
     box-shadow: inset -1px 0 shade(@theme_bg_color, 0.9),
                 inset 1px 0 alpha(@dark_shadow, 0.07),
                 inset 0 1px alpha(@dark_shadow, 0.08),
                 inset 0 -1px alpha(@dark_shadow, 0.05);
 }
 
-.primary-toolbar .button.raised.linked:insensitive,
-.primary-toolbar .raised.linked .button:insensitive,
+.linked .button:insensitive,
 .inline-toolbar.toolbar .button:insensitive,
-.inline-toolbar.toolbar GtkToolButton .button:insensitive {
+.inline-toolbar.toolbar GtkToolButton .button:insensitive,
+.inline-toolbar.toolbar GtkToolButton > .button:insensitive {
     box-shadow: inset -1px 0 shade(@theme_bg_color, 0.9);
 }
 
 /* remove box shadow from last-child and only-child */
 .linked .button:last-child,
-.toolbar .button.raised.linked:last-child,
-.toolbar .raised.linked .button:last-child,
-.inline-toolbar.toolbar .button:last-child,
-.inline-toolbar.toolbar GtkToolButton:last-child > .button,
 .linked .button:only-child,
-.toolbar .button.raised.linked:only-child,
-.toolbar .raised.linked .button:only-child,
-.inline-toolbar.toolbar .button:only-child,
-.inline-toolbar.toolbar GtkToolButton:only-child > .button,
 .linked .button:insensitive:last-child,
-.toolbar .button:insensitive.raised.linked:last-child,
-.toolbar .raised.linked .button:insensitive:last-child,
-.inline-toolbar.toolbar .button:insensitive:last-child,
-.inline-toolbar.toolbar GtkToolButton:last-child > .button:insensitive,
 .linked .button:insensitive:only-child,
-.toolbar .button:insensitive.raised.linked:only-child,
-.toolbar .raised.linked .button:insensitive:only-child,
+.linked .button:active:insensitive:last-child,
+.linked .button:active:insensitive:only-child,
+.inline-toolbar.toolbar .button:last-child,
+.inline-toolbar.toolbar .button:only-child,
+.inline-toolbar.toolbar .button:insensitive:last-child,
 .inline-toolbar.toolbar .button:insensitive:only-child,
-.inline-toolbar.toolbar GtkToolButton:only-child > .button:insensitive {
+.inline-toolbar.toolbar .button:active:insensitive:last-child,
+.inline-toolbar.toolbar .button:active:insensitive:only-child,
+.inline-toolbar.toolbar GtkToolButton:last-child > .button,
+.inline-toolbar.toolbar GtkToolButton:only-child > .button,
+.inline-toolbar.toolbar GtkToolButton:last-child > .button:insensitive,
+.inline-toolbar.toolbar GtkToolButton:only-child > .button:insensitive,
+.inline-toolbar.toolbar GtkToolButton:last-child > .button:active:insensitive,
+.inline-toolbar.toolbar GtkToolButton:only-child > .button:active:insensitive {
     box-shadow: none;
 }
 
+/* add back the inset shadow effect */
 .linked .button:active:last-child,
-.toolbar .button:active.raised.linked:last-child,
-.toolbar .raised.linked .button:active:last-child,
-.inline-toolbar.toolbar .button:active:last-child,
-.inline-toolbar.toolbar GtkToolButton:last-child > .button:active,
 .linked .button:active:only-child,
-.toolbar .button:active.raised.linked:only-child,
-.toolbar .raised.linked .button:active:only-child,
+.inline-toolbar.toolbar .button:active:last-child,
 .inline-toolbar.toolbar .button:active:only-child,
+.inline-toolbar.toolbar GtkToolButton:last-child > .button:active,
 .inline-toolbar.toolbar GtkToolButton:only-child > .button:active {
     box-shadow: inset 1px 0 alpha(@dark_shadow, 0.07),
                 inset 0 1px alpha(@dark_shadow, 0.08),
-                inset -1px 0 alpha(@dark_shadow, 0.07),
-                inset 0 -1px alpha(@dark_shadow, 0.05);
+                inset -1px 0 alpha(@dark_shadow, 0.07);
 }
 
 /* middle button */
-.primary-toolbar .button.raised.linked,
-.primary-toolbar .button.raised.linked:active,
-.primary-toolbar .button.raised.linked:insensitive,
-.primary-toolbar .raised.linked .button,
-.primary-toolbar .raised.linked .button:active,
-.primary-toolbar .raised.linked .button:insensitive,
+.linked .entry,
+.linked .button,
+.linked .button:active,
+.linked .button:active:hover,
+.linked .button:insensitive,
 .inline-toolbar.toolbar .button,
 .inline-toolbar.toolbar .button:active,
 .inline-toolbar.toolbar .button:insensitive,
@@ -2192,13 +1951,12 @@ GtkColorButton.button {
     border-left-width: 0;
 }
 
-/* leftmost button */
-.primary-toolbar .button.raised.linked:first-child,
-.primary-toolbar .button.raised.linked:active:first-child,
-.primary-toolbar .button.raised.linked:insensitive:first-child,
-.primary-toolbar .raised.linked .button:first-child,
-.primary-toolbar .raised.linked .button:active:first-child,
-.primary-toolbar .raised.linked .button:insensitive:first-child,
+/*leftmost button */
+.linked .entry:first-child,
+.linked .button:first-child,
+.linked .button:active:first-child,
+.linked .button:active:hover:first-child,
+.linked .button:insensitive:first-child,
 .inline-toolbar.toolbar .button:first-child,
 .inline-toolbar.toolbar .button:active:first-child,
 .inline-toolbar.toolbar .button:insensitive:first-child,
@@ -2213,12 +1971,11 @@ GtkColorButton.button {
 }
 
 /* rightmost button */
-.primary-toolbar .button.raised.linked:last-child,
-.primary-toolbar .button.raised.linked:active:last-child,
-.primary-toolbar .button.raised.linked:insensitive:last-child,
-.primary-toolbar .raised.linked .button:last-child,
-.primary-toolbar .raised.linked .button:active:last-child,
-.primary-toolbar .raised.linked .button:insensitive:last-child,
+.linked .entry:last-child,
+.linked .button:last-child,
+.linked .button:active:last-child,
+.linked .button:active:hover:last-child,
+.linked .button:insensitive:last-child,
 .inline-toolbar.toolbar .button:last-child,
 .inline-toolbar.toolbar .button:active:last-child,
 .inline-toolbar.toolbar .button:insensitive:last-child,
@@ -2233,12 +1990,11 @@ GtkColorButton.button {
 }
 
 /* linked single button */
-.primary-toolbar.toolbar .button:only-child,
-.primary-toolbar.toolbar .button:active:only-child,
-.primary-toolbar.toolbar .button:insensitive:only-child,
-.primary-toolbar.toolbar GtkToolButton:only-child .button,
-.primary-toolbar.toolbar GtkToolButton:only-child .button:active,
-.primary-toolbar.toolbar GtkToolButton:only-child .button:insensitive,
+.linked .entry:only-child,
+.linked .button:only-child,
+.linked .button:active:only-child,
+.linked .button:active:hover:only-child,
+.linked .button:insensitive:only-child,
 .inline-toolbar.toolbar .button:only-child,
 .inline-toolbar.toolbar .button:active:only-child,
 .inline-toolbar.toolbar .button:insensitive:only-child,
@@ -2249,6 +2005,230 @@ GtkColorButton.button {
     border-radius: 2px;
 }
 
+/* linked button shadows (vertical) */
+.linked.vertical .button,
+.inline-toolbar.toolbar.vertical .button,
+.inline-toolbar.toolbar.vertical GtkToolButton > .button {
+    box-shadow: inset 0 -1px shade(@theme_bg_color, 0.9);
+}
+
+.linked.vertical .button:active,
+.inline-toolbar.toolbar.vertical .button:active,
+.inline-toolbar.toolbar.vertical GtkToolButton > .button:active {
+    box-shadow: inset 0 -1px shade(@theme_bg_color, 0.9),
+                inset 1px 0 alpha(@dark_shadow, 0.07),
+                inset 0 1px alpha(@dark_shadow, 0.08),
+                inset -1px 0 alpha(@dark_shadow, 0.07);
+}
+
+.linked.vertical .button:insensitive,
+.inline-toolbar.toolbar.vertical .button:insensitive,
+.inline-toolbar.toolbar.vertical GtkToolButton > .button:insensitive {
+    box-shadow: inset 0 -1px shade(@theme_bg_color, 0.9);
+}
+
+/* remove box shadow from last-child and only-child */
+.linked.vertical .button:last-child,
+.linked.vertical .button:only-child,
+.linked.vertical .button:insensitive:last-child,
+.linked.vertical .button:insensitive:only-child,
+.linked.vertical .button:active:insensitive:last-child,
+.linked.vertical .button:active:insensitive:only-child,
+.inline-toolbar.toolbar.vertical .button:last-child,
+.inline-toolbar.toolbar.vertical .button:only-child,
+.inline-toolbar.toolbar.vertical .button:insensitive:last-child,
+.inline-toolbar.toolbar.vertical .button:insensitive:only-child,
+.inline-toolbar.toolbar.vertical .button:active:insensitive:last-child,
+.inline-toolbar.toolbar.vertical .button:active:insensitive:only-child,
+.inline-toolbar.toolbar.vertical GtkToolButton:last-child > .button,
+.inline-toolbar.toolbar.vertical GtkToolButton:only-child > .button,
+.inline-toolbar.toolbar.vertical GtkToolButton:last-child > .button:insensitive,
+.inline-toolbar.toolbar.vertical GtkToolButton:only-child > .button:insensitive,
+.inline-toolbar.toolbar.vertical GtkToolButton:last-child > .button:active:insensitive,
+.inline-toolbar.toolbar.vertical GtkToolButton:only-child > .button:active:insensitive {
+    box-shadow: none;
+}
+
+/* add back the inset shadow effect */
+.linked.vertical .button:active:last-child,
+.linked.vertical .button:active:only-child,
+.inline-toolbar.toolbar.vertical .button:active:last-child,
+.inline-toolbar.toolbar.vertical .button:active:only-child,
+.inline-toolbar.toolbar.vertical GtkToolButton:last-child > .button:active,
+.inline-toolbar.toolbar.vertical GtkToolButton:only-child > .button:active {
+    box-shadow: inset 1px 0 alpha(@dark_shadow, 0.07),
+                inset 0 1px alpha(@dark_shadow, 0.08),
+                inset -1px 0 alpha(@dark_shadow, 0.07);
+}
+
+/* middle button (vertical) */
+.linked.vertical .entry,
+.linked.vertical .button,
+.linked.vertical .button:active,
+.linked.vertical .button:active:hover,
+.linked.vertical .button:insensitive {
+    border-width: 1px;
+    border-radius: 0;
+    border-top-width: 0;
+    border-bottom-width: 0;
+}
+
+/* top button (vertical) */
+.linked.vertical .entry:first-child,
+.linked.vertical .button:first-child,
+.linked.vertical .button:active:first-child,
+.linked.vertical .button:active:hover:first-child,
+.linked.vertical .button:insensitive:first-child {
+    border-width: 1px;
+    border-radius: 2px;
+    border-bottom-width: 0;
+    border-bottom-right-radius: 0;
+    border-bottom-left-radius: 0;
+}
+
+/* bottom button (vertical) */
+.linked.vertical .entry:last-child,
+.linked.vertical .button:last-child,
+.linked.vertical .button:active:last-child,
+.linked.vertical .button:active:hover:last-child,
+.linked.vertical .button:insensitive:last-child {
+    border-width: 1px;
+    border-radius: 2px;
+    border-top-width: 0;
+    border-top-left-radius: 0;
+    border-top-right-radius: 0;
+}
+
+/* linked single button (vertical) */
+.linked.vertical .entry:only-child,
+.linked.vertical .button:only-child,
+.linked.vertical .button:active:only-child,
+.linked.vertical .button:active:hover:only-child,
+.linked.vertical .button:insensitive:only-child {
+    border-width: 1px;
+    border-radius: 2px;
+}
+
+/* linked toolbar buttons */
+.primary-toolbar .button.raised.linked,
+.primary-toolbar .raised.linked .button,
+.toolbar .button.linked {
+    box-shadow: inset -1px 0 shade(@toolbar_bg_color, 0.9);
+}
+
+.primary-toolbar .button.raised.linked:active,
+.primary-toolbar .raised.linked .button:active,
+.toolbar .button.linked:active {
+    box-shadow: inset -1px 0 shade(@toolbar_bg_color, 0.9),
+                inset 1px 0 alpha(@dark_shadow, 0.07),
+                inset 0 1px alpha(@dark_shadow, 0.08),
+                inset 0 -1px alpha(@dark_shadow, 0.05);
+}
+
+.primary-toolbar .button.raised.linked:insensitive,
+.primary-toolbar .raised.linked .button:insensitive,
+.toolbar .button.linked:insensitive {
+    box-shadow: inset -1px 0 shade(@toolbar_bg_color, 0.9);
+}
+
+/* remove box shadow from last-child and only-child */
+.primary-toolbar .button.raised.linked:last-child,
+.primary-toolbar .button.raised.linked:only-child,
+.primary-toolbar .button:insensitive.raised.linked:last-child,
+.primary-toolbar .button:insensitive.raised.linked:only-child,
+.primary-toolbar .button:active:insensitive.raised.linked:last-child,
+.primary-toolbar .button:active:insensitive.raised.linked:only-child,
+.primary-toolbar .raised.linked .button:last-child,
+.primary-toolbar .raised.linked .button:only-child,
+.primary-toolbar .raised.linked .button:insensitive:last-child,
+.primary-toolbar .raised.linked .button:insensitive:only-child,
+.primary-toolbar .raised.linked .button:active:insensitive:last-child,
+.primary-toolbar .raised.linked .button:active:insensitive:only-child,
+.toolbar .button.linked:last-child,
+.toolbar .button.linked:only-child,
+.toolbar .button:insensitive.raised.linked:last-child,
+.toolbar .button:insensitive.raised.linked:only-child,
+.toolbar .button:active:insensitive.raised.linked:last-child,
+.toolbar .button:active:insensitive.raised.linked:only-child {
+    box-shadow: none;
+}
+
+/* add back the inset shadow effect */
+.primary-toolbar .button:active.raised.linked:last-child,
+.primary-toolbar .button:active.raised.linked:only-child,
+.primary-toolbar .raised.linked .button:active:last-child,
+.primary-toolbar .raised.linked .button:active:only-child,
+.toolbar .button:active.raised.linked:last-child,
+.toolbar .button:active.raised.linked:only-child {
+    box-shadow: inset 1px 0 alpha(@dark_shadow, 0.07),
+                inset 0 1px alpha(@dark_shadow, 0.08),
+                inset -1px 0 alpha(@dark_shadow, 0.07);
+}
+
+/* middle button */
+.primary-toolbar .button.raised.linked,
+.primary-toolbar .button.raised.linked:active,
+.primary-toolbar .button.raised.linked:insensitive,
+.primary-toolbar .raised.linked .button,
+.primary-toolbar .raised.linked .button:active,
+.primary-toolbar .raised.linked .button:insensitive,
+.toolbar .button.linked,
+.toolbar .button.linked:active,
+.toolbar .button.linked:insensitive {
+    border-width: 1px;
+    border-radius: 0;
+    border-right-width: 0;
+    border-left-width: 0;
+}
+
+/* leftmost button */
+.primary-toolbar .button.raised.linked:first-child,
+.primary-toolbar .button.raised.linked:active:first-child,
+.primary-toolbar .button.raised.linked:insensitive:first-child,
+.primary-toolbar .raised.linked .button:first-child,
+.primary-toolbar .raised.linked .button:active:first-child,
+.primary-toolbar .raised.linked .button:insensitive:first-child,
+.toolbar .button.linked:first-child,
+.toolbar .button.linked:active:first-child,
+.toolbar .button.linked:insensitive:first-child {
+    border-width: 1px;
+    border-radius: 2px;
+    border-right-width: 0;
+    border-bottom-right-radius: 0;
+    border-top-right-radius: 0;
+}
+
+/* rightmost button */
+.primary-toolbar .button.raised.linked:last-child,
+.primary-toolbar .button.raised.linked:active:last-child,
+.primary-toolbar .button.raised.linked:insensitive:last-child,
+.primary-toolbar .raised.linked .button:last-child,
+.primary-toolbar .raised.linked .button:active:last-child,
+.primary-toolbar .raised.linked .button:insensitive:last-child,
+.toolbar .button.linked:last-child,
+.toolbar .button.linked:active:last-child,
+.toolbar .button.linked:insensitive:last-child {
+    border-width: 1px;
+    border-radius: 2px;
+    border-left-width: 0;
+    border-bottom-left-radius: 0;
+    border-top-left-radius: 0;
+}
+
+/* linked single button */
+.primary-toolbar .button.raised.linked:only-child,
+.primary-toolbar .button.raised.linked:active:only-child,
+.primary-toolbar .button.raised.linked:insensitive:only-child,
+.primary-toolbar .raised.linked .button:only-child,
+.primary-toolbar .raised.linked .button:active:only-child,
+.primary-toolbar .raised.linked .button:insensitive:only-child,
+.toolbar .button.linked:only-child,
+.toolbar .button.linked:active:only-child,
+.toolbar .button.linked:insensitive:only-child {
+    border-width: 1px;
+    border-radius: 2px;
+}
+
 /***********
  * tooltip *
  ***********/