<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>
<body class="container-fluid">
<div class="row">
<div class="col-md-4 col-md-offset-4">
<div class="box">
<div class="input-group">
<span class="input-group-addon addon-facebook">
<i class="fa fa-fw fa-2x fa-facebook fa-fw"></i>
</span>
<a class="btn btn-lg btn-block btn-facebook" href="#"> Register with Facebook</a>
</div>
<div class="input-group">
<span class="input-group-addon addon-twitter">
<i class="fa fa-fw fa-2x fa-twitter fa-fw"></i>
</span>
<a class="btn btn-lg btn-block btn-twitter" href="#"> Register with Twitter</a>
</div>
<form role="form">
<div class="divider-form"></div>
<div class="form-group">
<label for="exampleInputEmail1">Email address</label>
<input type="email" class="form-control" id="exampleInputEmail1" placeholder="Enter email">
</div>
<div class="divider-form"></div>
<div class="form-group">
<label for="exampleInputPassword1">Password</label>
<input type="password" class="form-control" id="exampleInputPassword1" placeholder="Password">