diff --git a/src/sass/gtk/_applications-3.0.scss b/src/sass/gtk/_applications-3.0.scss
index e5e2a13..8cc41b1 100644
--- a/src/sass/gtk/_applications-3.0.scss
+++ b/src/sass/gtk/_applications-3.0.scss
@@ -2396,6 +2396,32 @@ flowboxchild.bookmark-tag-widget {
   }
 }
 
+//
+// Seahorse
+//
+
+window.background.csd {
+  > leaflet.unfolded {
+    > scrolledwindow > viewport.frame {
+      > list { // left side
+        background-color: $dark_sidebar_bg;
+        border-bottom-left-radius: $wm_radius;
+
+        > row {
+          @extend %sidebar_row;
+        }
+      }
+    }
+
+    > box.vertical > stack {
+      background-color: $base_color;
+      border-bottom-right-radius: $wm_radius;
+    }
+
+    > box.vertical > searchbar { background-color: $base_color; }
+  }
+}
+
 //
 // documents-scrolledwi (Totem, Documents, EvView)
 //
@@ -3058,7 +3084,6 @@ window#GearyMainWindow.background.csd {
         border-radius: $bt_radius;
 
         treeview.view {
-          border: none;
           background-image: none;
 
           &:hover { background-color: rgba($fg_color, 0.1); }
@@ -3173,7 +3198,6 @@ window#GearyMainWindow.background.csd {
       background-color: $base_color;
 
       treeview.view {
-        border: none;
         background-image: none;
 
         &:hover { background-color: rgba($fg_color, 0.1); }
diff --git a/src/sass/gtk/_common-3.0.scss b/src/sass/gtk/_common-3.0.scss
index 4e46c82..87b829b 100644
--- a/src/sass/gtk/_common-3.0.scss
+++ b/src/sass/gtk/_common-3.0.scss
@@ -1511,6 +1511,7 @@ headerbar {
       border-radius: 0;
       margin-top: 0;
       margin-bottom: 0;
+      min-height: 0;
     }
 
     > button.popup {
@@ -3204,7 +3205,7 @@ scrolledwindow {
       border-top-right-radius: $wm_radius;
     }
 
-    > box.vertical list {
+    > box.vertical list.frame {
       @extend %circular_list;
       padding: 0;
 
@@ -3275,7 +3276,7 @@ list {
 
   row { padding: 2px; }
 
-  &.content {
+  &.content:not(.conversation-listbox) {
     @extend %circular_list;
 
     > row {