app/views/layouts/mobile.html.erb
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Species+ mobile</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="description" content="">
<meta name="author" content="">
<%= stylesheet_link_tag "mobile" %>
<%= javascript_include_tag "application" %>
<%= csrf_meta_tags %>
<%= csp_meta_tag %>
</head>
<body>
<div class="mobile">
<%= render 'shared/alerts' %>
<%= yield %>
</div>
</body>
</html>