Move css_paths to launch() and drop dead #duplicate-button CSS

style.css

@@ -2,10 +2,3 @@ h1 {
   text-align: center;
   display: block;
 }
-
-#duplicate-button {
-  margin: auto;
-  color: white;
-  background: #1565c0;
-  border-radius: 100vh;
-}