Lighten background a bit

server/static/css/signin.css

 body {
   padding-top: 15%;
   padding-bottom: 20%;
-  background-color: #eee;
+  background-color: #efefef;
 }
 .form-signin {
   max-width: 330px;
@@ -36,6 +36,9 @@ body {
   border-top-left-radius: 0;
   border-top-right-radius: 0;
 }
+.form-signin input[type="text"] {
+  margin-bottom: 10px;
+}
 .error {
   font-weight: bold;
   color: red;