diff --git a/packages/frontend/src/themes/d-botanical.json5 b/packages/frontend/src/themes/d-botanical.json5
index c03b95e2d..33cf7aa81 100644
--- a/packages/frontend/src/themes/d-botanical.json5
+++ b/packages/frontend/src/themes/d-botanical.json5
@@ -13,8 +13,7 @@
 		fgHighlighted: '#fff',
 		divider: 'rgba(255, 255, 255, 0.14)',
 		panel: 'rgb(47, 47, 44)',
-		panelHeaderBg: '@panel',
-		panelHeaderDivider: '@divider',
+		panelHeaderDivider: 'rgba(0, 0, 0, 0)',
 		header: ':alpha<0.7<@panel',
 		navBg: '#363636',
 		renote: '@accent',
diff --git a/packages/frontend/src/themes/d-dark.json5 b/packages/frontend/src/themes/d-dark.json5
index d24ce4df6..63144e88e 100644
--- a/packages/frontend/src/themes/d-dark.json5
+++ b/packages/frontend/src/themes/d-dark.json5
@@ -13,8 +13,7 @@
 		fgHighlighted: '#fff',
 		divider: 'rgba(255, 255, 255, 0.14)',
 		panel: '#2d2d2d',
-		panelHeaderBg: '@panel',
-		panelHeaderDivider: '@divider',
+		panelHeaderDivider: 'rgba(0, 0, 0, 0)',
 		header: ':alpha<0.7<@panel',
 		navBg: '#363636',
 		renote: '@accent',
diff --git a/packages/frontend/src/themes/d-future.json5 b/packages/frontend/src/themes/d-future.json5
index b6fa1ab0c..0962a1241 100644
--- a/packages/frontend/src/themes/d-future.json5
+++ b/packages/frontend/src/themes/d-future.json5
@@ -14,8 +14,7 @@
 		fgOnAccent: '#000',
 		divider: 'rgba(255, 255, 255, 0.1)',
 		panel: '#18181c',
-		panelHeaderBg: '@panel',
-		panelHeaderDivider: '@divider',
+		panelHeaderDivider: 'rgba(0, 0, 0, 0)',
 		renote: '@accent',
 		mention: '#f2c97d',
 		mentionMe: '@accent',
diff --git a/packages/frontend/src/themes/d-green-lime.json5 b/packages/frontend/src/themes/d-green-lime.json5
index a6983b9ac..9522f534a 100644
--- a/packages/frontend/src/themes/d-green-lime.json5
+++ b/packages/frontend/src/themes/d-green-lime.json5
@@ -14,8 +14,7 @@
 		fgOnAccent: '#192320',
 		divider: '#e7fffb24',
 		panel: '#192320',
-		panelHeaderBg: '@panel',
-		panelHeaderDivider: '@divider',
+		panelHeaderDivider: 'rgba(0, 0, 0, 0)',
 		popup: '#293330',
 		renote: '@accent',
 		mentionMe: '#ffaa00',
diff --git a/packages/frontend/src/themes/d-green-orange.json5 b/packages/frontend/src/themes/d-green-orange.json5
index 62adc39e2..e542782c6 100644
--- a/packages/frontend/src/themes/d-green-orange.json5
+++ b/packages/frontend/src/themes/d-green-orange.json5
@@ -14,8 +14,7 @@
 		fgOnAccent: '#192320',
 		divider: '#e7fffb24',
 		panel: '#192320',
-		panelHeaderBg: '@panel',
-		panelHeaderDivider: '@divider',
+		panelHeaderDivider: 'rgba(0, 0, 0, 0)',
 		popup: '#293330',
 		renote: '@accent',
 		mentionMe: '#b4e900',
diff --git a/packages/frontend/src/ui/deck/column.vue b/packages/frontend/src/ui/deck/column.vue
index e895847bd..798bfdc98 100644
--- a/packages/frontend/src/ui/deck/column.vue
+++ b/packages/frontend/src/ui/deck/column.vue
@@ -318,10 +318,7 @@ function onDrop(ev) {
 	background: var(--panelHeaderBg);
 	box-shadow: 0 1px 0 0 var(--panelHeaderDivider);
 	cursor: pointer;
-
-	&, * {
-		user-select: none;
-	}
+	user-select: none;
 }
 
 .title {