diff --git a/gtk/theme/HighContrast/_common.scss b/gtk/theme/HighContrast/_common.scss
index 50b082afe6..8d22b73ed9 100644
--- a/gtk/theme/HighContrast/_common.scss
+++ b/gtk/theme/HighContrast/_common.scss
@@ -3088,30 +3088,35 @@ placesview {
 
 
 paned {
-  separator {
+  > separator {
     min-width: 1px;
     min-height: 1px;
     background-image: _solid($borders_color);
+
     &:backdrop {
       background-image: _solid($backdrop_borders_color);
     }
   }
-   &:dir(ltr).horizontal separator {
+
+  &:dir(ltr).horizontal > separator {
     margin: 0 -8px 0 0;
     padding: 0 8px 0 0;
   }
-  &:dir(rtl).horizontal separator {
+  &:dir(rtl).horizontal > separator {
     margin: 0 0 0 -8px;
     padding: 0 0 0 8px;
   }
-  &.vertical separator {
+
+  &.vertical > separator {
     margin: 0 0 -8px 0;
     padding: 0 0 8px 0;
   }
-  separator:selected {
+
+  > separator:selected {
     background-color: $selected_bg_color;
   }
-  separator.wide {
+
+  > separator.wide {
     min-width: 5px;
     min-height: 5px;
     background-color: transparent;
diff --git a/gtk/theme/HighContrast/gtk-contained-inverse.css b/gtk/theme/HighContrast/gtk-contained-inverse.css
index 66e196c492..3bb3b92abc 100644
--- a/gtk/theme/HighContrast/gtk-contained-inverse.css
+++ b/gtk/theme/HighContrast/gtk-contained-inverse.css
@@ -1371,19 +1371,19 @@ placesview .server-list-button:checked > image { transition: 200ms cubic-bezier(
 placesview row.activatable:hover { background-color: transparent; }
 
 /********* Paned * */
-paned separator { min-width: 1px; min-height: 1px; background-image: linear-gradient(to bottom, gray, gray); }
+paned > separator { min-width: 1px; min-height: 1px; background-image: linear-gradient(to bottom, gray, gray); }
 
-paned separator:backdrop { background-image: linear-gradient(to bottom, #737373, #737373); }
+paned > separator:backdrop { background-image: linear-gradient(to bottom, #737373, #737373); }
 
-paned:dir(ltr).horizontal separator { margin: 0 -8px 0 0; padding: 0 8px 0 0; }
+paned:dir(ltr).horizontal > separator { margin: 0 -8px 0 0; padding: 0 8px 0 0; }
 
-paned:dir(rtl).horizontal separator { margin: 0 0 0 -8px; padding: 0 0 0 8px; }
+paned:dir(rtl).horizontal > separator { margin: 0 0 0 -8px; padding: 0 0 0 8px; }
 
-paned.vertical separator { margin: 0 0 -8px 0; padding: 0 0 8px 0; }
+paned.vertical > separator { margin: 0 0 -8px 0; padding: 0 0 8px 0; }
 
-paned separator:selected { background-color: #ddd; }
+paned > separator:selected { background-color: #ddd; }
 
-paned separator.wide { min-width: 5px; min-height: 5px; background-color: transparent; border-style: none solid; border-color: gray; border-width: 1px; }
+paned > separator.wide { min-width: 5px; min-height: 5px; background-color: transparent; border-style: none solid; border-color: gray; border-width: 1px; }
 
 /************** GtkInfoBar * */
 infobar { border-width: 0; border-style: none; }
diff --git a/gtk/theme/HighContrast/gtk-contained.css b/gtk/theme/HighContrast/gtk-contained.css
index e818e27632..0b5b24a2bb 100644
--- a/gtk/theme/HighContrast/gtk-contained.css
+++ b/gtk/theme/HighContrast/gtk-contained.css
@@ -1377,19 +1377,19 @@ placesview .server-list-button:checked > image { transition: 200ms cubic-bezier(
 placesview row.activatable:hover { background-color: transparent; }
 
 /********* Paned * */
-paned separator { min-width: 1px; min-height: 1px; background-image: linear-gradient(to bottom, gray, gray); }
+paned > separator { min-width: 1px; min-height: 1px; background-image: linear-gradient(to bottom, gray, gray); }
 
-paned separator:backdrop { background-image: linear-gradient(to bottom, #8d8d8d, #8d8d8d); }
+paned > separator:backdrop { background-image: linear-gradient(to bottom, #8d8d8d, #8d8d8d); }
 
-paned:dir(ltr).horizontal separator { margin: 0 -8px 0 0; padding: 0 8px 0 0; }
+paned:dir(ltr).horizontal > separator { margin: 0 -8px 0 0; padding: 0 8px 0 0; }
 
-paned:dir(rtl).horizontal separator { margin: 0 0 0 -8px; padding: 0 0 0 8px; }
+paned:dir(rtl).horizontal > separator { margin: 0 0 0 -8px; padding: 0 0 0 8px; }
 
-paned.vertical separator { margin: 0 0 -8px 0; padding: 0 0 8px 0; }
+paned.vertical > separator { margin: 0 0 -8px 0; padding: 0 0 8px 0; }
 
-paned separator:selected { background-color: #000; }
+paned > separator:selected { background-color: #000; }
 
-paned separator.wide { min-width: 5px; min-height: 5px; background-color: transparent; border-style: none solid; border-color: gray; border-width: 1px; }
+paned > separator.wide { min-width: 5px; min-height: 5px; background-color: transparent; border-style: none solid; border-color: gray; border-width: 1px; }
 
 /************** GtkInfoBar * */
 infobar { border-width: 0; border-style: none; }