<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <form class="form-horizontal"> <fieldset> <!-- Form Name --> <legend>Acesso ao Sistema</legend> <!-- Text input--> <div class="form-group"> <label class="col-md-4 control-label" for="usuario">Usuário</label> <div class="col-md-4"> <input id="usuario" name="usuario" type="text" placeholder="Nome do Usuário" class="form-control input-md" required=""> </div> </div> <!-- Password input--> <div class="form-group"> <label class="col-md-4 control-label" for="senha">Senha do Usuário</label> <div class="col-md-4"> <input id="senha" name="senha" type="password" placeholder="Senha do usuário" class="form-control input-md" required=""> </div> </div> <!-- Button --> <div class="form-group"> <label class="col-md-4 control-label" for="enviar"></label> <div class="col-md-4"> <button id="enviar" name="enviar" class="btn btn-success">Acessar</button> </div> </div> </fieldset> </form>