Hide sandwitch button when display is too large

macao/assets/_custom.scss

@@ -104,6 +104,13 @@ a.active {
   padding: 5px;
 }
 
+// Hide element when width is less than 900px
+@media (min-width: 900px) {
+  .book-icon {
+    display: none;
+  }
+}
+
 // ***********************************
 // Comment on page
 // ***********************************