Update styling

* make background lighter, and add a shadow around the form box

static/style.css

@@ -7,7 +7,7 @@
 
 body {
   font-size: 16px;
-  background-color: #006699;
+  background-color: #f6f6f6;
   font-feature-settings: "liga", "kern";
   text-rendering: optimizeLegibility;
   font-family: Roboto, sans-serif;
@@ -24,7 +24,8 @@ body {
 form {
   background: white;
   padding: 2em;
-  border: 1px solid black;
+  border: 1px solid rgba(0, 0, 0, 0.2);
+  box-shadow: #aaaaaa 0px 1px 5px 0px;
 
   display: flex;
   flex-direction: column;