Update style.css

style.css

@@ -4,6 +4,13 @@
   margin-right: auto;
 }
 
+gradio-app{
+  background: rgb(153,0,255);
+  background-image: radial-gradient(circle, rgba(153,0,255,1) 0%, rgba(9,15,121,1) 96%, rgba(2,0,36,1) 100%) !important;
+  height: 100%;
+  width: 100%;
+}
+
 #row-flex {
   display: flex;
   align-items: center;