source/404.html

<!DOCTYPE html>
<html lang="en">
<head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">

    <!-- Metro 4 -->
    <link rel="stylesheet" href="vendors/metro4/css/metro-all.min.css">
    <link rel="stylesheet" href="css/index.css">

    <title>Pandora :: 404 Page not found</title>

    <script>
        var customButtons = [
            {
                html: "<span class='mif-search mif-2x'>",
                onclick: function(){
                    $(this.form).submit()
                }
            }
        ];
    </script>

</head>
<body class="m4-cloak h-vh-100 d-flex flex-justify-center flex-align-center">
    <div class="container text-center">

        <img src="images/p-120x120.png" >

        <div class="display4 fg-orange mt-0">404</div>
        <div class="h1 text-center m-8">Oops!<br>Page not found.</div>

        <div class="text-leader2 text-center page-error-box mx-auto">
            We could not find the page you were looking for.
            <br>Meanwhile, you may <a href="index.html">return to dashboard</a> or try using the search form.
        </div>

        <form class="p-4 mx-auto page-error-box" action="javascript:">
            <input type="text" data-role="input" data-custom-buttons="customButtons" placeholder="Search..." class="input-large">
        </form>
    </div>

    <script src="vendors/jquery/jquery-3.4.1.min.js"></script>
    <script src="vendors/metro4/js/metro.min.js"></script>
</body>
</html>