diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index 3704751eff..2d7aa32d83 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -2890,24 +2890,31 @@ $ui-header-height: 55px;
     }
   }
 
-  .layout-single-column .ui__header {
-    display: flex;
-    background: var(--background-color-tint);
-    border-bottom: 1px solid var(--background-border-color);
-  }
+  .layout-single-column {
+    .ui__header {
+      display: flex;
+      background: var(--background-color-tint);
+      border-bottom: 1px solid var(--background-border-color);
+    }
 
-  .column > .scrollable,
-  .tabs-bar__wrapper .column-header,
-  .tabs-bar__wrapper .column-back-button {
-    border-left: 0;
-    border-right: 0;
-  }
+    .column > .scrollable,
+    .tabs-bar__wrapper .column-header,
+    .tabs-bar__wrapper .column-back-button {
+      border-left: 0;
+      border-right: 0;
+    }
 
-  .column-header,
-  .column-back-button,
-  .scrollable,
-  .error-column {
-    border-radius: 0 !important;
+    .column-header,
+    .column-back-button,
+    .scrollable,
+    .error-column {
+      border-radius: 0 !important;
+    }
+
+    .column-header,
+    .column-back-button {
+      border-top: 0;
+    }
   }
 }
 
@@ -3466,10 +3473,6 @@ $ui-header-height: 55px;
   &:hover {
     text-decoration: underline;
   }
-
-  @media screen and (max-width: $no-gap-breakpoint) {
-    border-top: 0;
-  }
 }
 
 .column-header__back-button {
@@ -4233,10 +4236,6 @@ a.status-card {
       padding-top: 16px;
     }
   }
-
-  @media screen and (max-width: $no-gap-breakpoint) {
-    border-top: 0;
-  }
 }
 
 .column-header__buttons {