diff --git a/src/browser/base/content/zen-styles/zen-browser-ui.css b/src/browser/base/content/zen-styles/zen-browser-ui.css
index bc71a4a6e..ff17a92f5 100644
--- a/src/browser/base/content/zen-styles/zen-browser-ui.css
+++ b/src/browser/base/content/zen-styles/zen-browser-ui.css
@@ -42,23 +42,3 @@
   display: flex;
   flex-direction: row;
 }
-
-#tabbrowser-tabpanels[zen-split-view] {
-  .zen-split-view-splitter {
-    display: inherit !important;
-  }
-  .zen-split-view-splitter[orient='vertical'] {
-    width: 7px;
-  }
-  .zen-split-view-splitter[orient='horizontal'] {
-    height: 7px;
-    cursor: n-resize;
-  }
-}
-
-.zen-split-view-splitter {
-  display: none;
-  visibility: inherit;
-  cursor: ew-resize;
-  -moz-subtree-hidden-only-visually: 0;
-}
diff --git a/src/browser/base/content/zen-styles/zen-decks.css b/src/browser/base/content/zen-styles/zen-decks.css
index 79a6d6227..9ef63985b 100644
--- a/src/browser/base/content/zen-styles/zen-decks.css
+++ b/src/browser/base/content/zen-styles/zen-decks.css
@@ -30,8 +30,28 @@
 
 #tabbrowser-tabpanels:has(> [zen-split='true']) {
   display: grid;
-  row-gap: var(--zen-element-separation);
-  column-gap: calc(var(--zen-element-separation) / 2);
+  row-gap: 0;
+  column-gap: 0;
+  --zen-split-grid-gap: calc(var(--zen-element-separation) + 2px);
+  --zen-split-row-gap: var(--zen-split-grid-gap);
+  --zen-split-column-gap: var(--zen-split-grid-gap);
+}
+
+#tabbrowser-tabpanels[zen-split-view] {
+  .zen-split-view-splitter {
+    display: inherit;
+  }
+}
+
+.zen-split-view-splitter {
+  display: none;
+  visibility: inherit;
+  cursor: ew-resize;
+  -moz-subtree-hidden-only-visually: 0;
+}
+
+.zen-split-view-splitter[orient='horizontal'] {
+  cursor: n-resize;
 }
 
 #zen-split-views-box:not([hidden='true']) {