Update static/style.css

static/style.css

@@ -1,3 +1,25 @@
+#all{
+  position: fixed; /* Sit on top of the page content */
+  display: none; /* Hidden by default */
+  width: 100%; /* Full width (cover the whole page) */
+  height: 100%; /* Full height (cover the whole page) */
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background-color: rgba(0,0,0,0.5); /* Black background with opacity */
+  z-index: 2; /* Specify a stack order in case you're using a different order for other elements */
+  
+}
+#pleasewait{
+  position: absolute;
+  top: 50%;
+  left: 50%;
+  font-size: 20px;
+  color: black;
+  transform: translate(-50%,-50%);
+  -ms-transform: translate(-50%,-50%);
+}
 .accordion {
     background-color:#F4C2C2 ; /*gray;*/
     color: white;