404.html

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="utf-8">
        <title>Page Not Found :(</title>
    </head>
    <body>
        <div class="container">
            <h1>Not found <span>:(</span></h1>
            <p>Sorry, but the page you were trying to view does not exist.</p>
            <p>It looks like this was the result of either:</p>
            <ul>
                <li>a mistyped address</li>
                <li>an out-of-date link</li>
            </ul>
        </div>
    </body>
</html>