<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<div class="container">
<div class="row">
<div class="col-xs-10 col-xs-offset-1 col-sm-6 col-sm-offset-3 col-md-5 col-md-offset-4 col-lg-4 col-lg-offset-4">
<h3>Application Name</h3>
<div class="panel panel-default box-shadow">
<div class="panel-heading">
<span class="text-primary">Authentication</span>
<span class="text-muted pull-right today" title="Today"></span>
</div>
<div class="panel-body">
<form method="POST">
<div class="form-group">
<label for="email">Email</label>
<div class="input-group">
<div class="input-group-addon"><i class="glyphicon glyphicon-envelope"></i></div>
<input autofocus required type="email" id="email" class="form-control" placeholder="Your email" tabindex="1">
</div>
</div>
<div class="form-group">
<label for="password">Password</label>
<a href="#forget-password" class="btn btn-xs btn-link" tabindex="4">Forget password?</a>
<div class="input-group">
<div class="input-group-addon"><i class="glyphicon glyphicon-lock"></i></div>
<input required type="password" class="form-control" placeholder="Your password" tabindex="2">
</div>
</div>