diff --git a/client/style.css b/client/style.css
index ec57caf..824c16a 100755
--- a/client/style.css
+++ b/client/style.css
@@ -91,7 +91,7 @@ header {
 	width: 48px;
 	background-color: #eee;
 	margin: 0 auto;
-	transition: box-shadow 150ms;
+	transition: transform 150ms, box-shadow 150ms;
 	border: 1px solid rgba(0, 0, 0, .1);
 	user-select: none;
 }
@@ -106,7 +106,7 @@ header {
 }
 
 :checked ~ label[for=btn-history] {
-	transform: rotate(180deg);
+	transform: rotateX(180deg);
 }
 
 table {