Update static/style.css

static/style.css

@@ -67,7 +67,7 @@ button:hover {
 /* Main content with psychedelic patterns */
 .main-content {
   padding: 50px;
-  background-image: url('psychedelic-pattern.png'); /* Replace with the actual path to your psychedelic pattern image */
+  background-image: url('/static/psychedelic-pattern.png'); /* Replace with the actual path to your psychedelic pattern image */
   background-size: cover;
   text-align: center;
 }