Update static/style.css

static/style.css

@@ -6,18 +6,26 @@ body {
     height: 100vh;
 }
 
-#whiteboard {
+#canvas-container {
+    position: relative;
     flex-grow: 1;
 }
 
+#background-canvas,
+#drawing-canvas {
+    position: absolute;
+    top: 0;
+    left: 0;
+}
+
 #toolbar {
     display: flex;
     justify-content: center;
     align-items: center;
     padding: 10px;
-    background-color: #A6B2FF;
+    background-color: #f0f0f0;
 }
 
 #toolbar > * {
     margin: 0 10px;
-}
+}