Always-visible app title: white text + drop shadow on masthead h1/tagline

app/public/index.html

@@ -16,7 +16,7 @@
 <link rel="preconnect" href="https://fonts.googleapis.com">
 <link href="https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700&family=Playfair+Display:wght@500;600&display=swap" rel="stylesheet">
 <link rel="stylesheet" href="https://unpkg.com/leaflet@1.9.4/dist/leaflet.css">
-<link rel="stylesheet" href="style.css?v=4">
+<link rel="stylesheet" href="style.css?v=5">
 </head>
 <body>
 <div class="app">