Update style.css

style.css

@@ -3,10 +3,17 @@
   margin-left: auto;
   margin-right: auto;
 }
-gradio-app{
+/* gradio-app{
   background:url("file=tFTl2R.gif") !important;
   height: 100%;
   width : 100%;
+} */
+gradio-app {
+  background: url("file=tFTl2R.gif"") !important;
+  background-size: cover;
+  background-position: center;
+  height: 100vh; /* 100% of the viewport height */
+  width: 100vw; /* 100% of the viewport width */
 }
 .filenameshow{
   height:110px;