<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="row base">
<div class="col-md-12">
<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal" data-whatever="@mdo">Open Modal</button>
<div class="modal fade bs-example-modal-sm" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel">
<div class="modal-dialog modal-sm" role="document">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button>
<h4 class="modal-title" id="exampleModalLabel">Entrar</h4>
</div>
<div class="modal-body">
<div class="row">
<div class="col-md-12">
<div class="form">
<div class="form-group">
<label for="recipient-name" class="control-label">Email</label>
<input type="text" class="form-control" id="recipient-name">
</div>
<div class="form-group">
<label for="message-text" class="control-label">Senha</label>
<label for="message-text" class="control-label labelRight"><a href="#">Esqueceu sua Senha?</a></label>
<input type="text" class="form-control" id="recipient-name">
</div>
<button type="button" class="button btn primary">Entrar</button>
<p>- ou -</p>