diff --git a/packages/app/src/layout/header/index.less b/packages/app/src/layout/header/index.less
index aa967eb6..733f105e 100644
--- a/packages/app/src/layout/header/index.less
+++ b/packages/app/src/layout/header/index.less
@@ -1,20 +1,20 @@
 @import "theme/index.less";
 
 .app_header {
-	user-select         : none;
+	user-select: none;
 	--webkit-user-select: none;
 
-	display       : flex;
+	display: flex;
 	flex-direction: row;
-	align-items   : center;
-	z-index       : 100;
+	align-items: center;
+	z-index: 100;
 
-	height : @app_header_height !important;
+	height: @app_header_height  !important;
 	padding: 10px;
 
 	transition: all ease-in-out 150ms;
 
-	background      : var(--background-color-primary) !important;
+	background: var(--background-color-primary) !important;
 	background-color: var(--background-color-primary) !important;
 
 	border-bottom: 1px var(--border-color) solid;
@@ -25,7 +25,8 @@
 
 	&.hidden {
 		opacity: 0;
-		height : 0 !important;
+		height: 0 !important;
 		padding: 0 !important;
+		border: 0 !important;
 	}
 }
\ No newline at end of file