<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>
<link href="//maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css" rel="stylesheet">
<div class="container">
<div class="row">
<div class="col-md-offset-5 col-md-3">
<div class="form-login">
<h4>Welcome back.</h4>
<input type="text" id="userName" class="form-control input-sm chat-input" placeholder="username" />
</br>
<input type="text" id="userPassword" class="form-control input-sm chat-input" placeholder="password" />
</br>
<div class="wrapper">
<span class="group-btn">
<a href="#" class="btn btn-primary btn-md">login <i class="fa fa-sign-in"></i></a>
</span>
</div>
</div>
</div>
</div>
</div>