Hide overflow for root element

public/src/css/main.css

@@ -12,9 +12,10 @@ body{
 	width: 100%;
 	height: 100%;
 	background: #fe7839;
-	position: relative;
+	position: absolute;
 	user-select: none;
 	touch-action: none;
+	overflow: hidden;
 }
 #screen{
 	width: 100%;
@@ -233,10 +234,10 @@ kbd{
 }
 @keyframes bgscroll{
 	from{
-		background-position: 0 center;
+		background-position: 0 top;
 	}
 	to{
-		background-position: calc(-100vh / 720 * 512) center;
+		background-position: calc(-100vh / 720 * 512) top;
 	}
 }
 #song-select{
@@ -251,9 +252,7 @@ kbd{
 }
 #song-sel-canvas{
 	position: absolute;
-	top: 0;
 	right: 0;
-	bottom: 0;
 	left: 0;
 	margin: auto;
 }