Responsive HTML + Twitter Bootstrap


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Login | The Don</title>    <link href="/thedon/public//css/normalize.css" media="screen" rel="stylesheet" type="text/css" />
<link href="/thedon/public//css/bootstrap.css" media="screen" rel="stylesheet" type="text/css" />
<link href="/thedon/public//css/font-awesome.css" media="screen" rel="stylesheet" type="text/css" />
<link href="/thedon/public//css/thedon.css" media="screen" rel="stylesheet" type="text/css" />
<link href="/thedon/public//css/font-awesome-ie7.min.css" media="screen" rel="stylesheet" type="text/css" />
<link href="http://code.jquery.com/ui/1.10.2/themes/smoothness/jquery-ui.css" media="screen" rel="stylesheet" type="text/css" />
<link href="/thedon/public//css/bootstrap-responsive.css" media="screen" rel="stylesheet" type="text/css" />    <script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"></script>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.9.1.js"></script>
<script type="text/javascript" src="http://code.jquery.com/ui/1.10.2/jquery-ui.js"></script></head>

<body>
<div class="container-fluid span12">
<form class="form-horizontal form-signin" method="post">
    <center><h2>TheDon CMS</h2></center>
    <div class="control-group ">
        <div class="controls input-prepend">
            <span class="add-on"><i class="icon-user" ></i></span>

<input type="text" name="ds_nick_usr" id="ds_nick_usr" value="" placeholder="Usuario" class="span1" />        </div>
    </div>
    <div class="control-group ">
        <div class="controls input-prepend">
            <span class="add-on"><i class="icon-key" ></i></span>

<input type="password" name="ds_password_usr" id="ds_password_usr" value="" placeholder="Senha" class="span2" />        </div>
    </div>
       <center> <div class="controls ">
            <dt id="Logar-label">&#160;</dt><dd id="Logar-element">
<input type="submit" name="Logar" id="Logar" value="Logar" class="btn btn-inverse" /></dd>        </div></center>
</form>
</div>

</body>
</html>