Add .map-screen styles to App.css

src/App.css

@@ -391,3 +391,13 @@
   color: #6b5a3e;
   font-size: 0.85rem;
 }
+
+/* Map screen */
+.map-screen {
+  padding: 1.5rem 1rem;
+  background: #0f1a24;
+  min-height: calc(100vh - 49px);
+  display: flex;
+  align-items: flex-start;
+  justify-content: center;
+}