Boa tarde , fiz uma nava responsive na tela normal computador esta perfeita . Uso a tag para img responsive porém não se ajusta. ultrapassando a linha. segue o código, como corrigir?
<!DOCTYPE html>
<html lang="pt-br">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title> Zem </title>
<link rel="icon" href="img/favicon.ico">
<!-- Bootstrap -->
<link href="bootstrap/css/bootstrap.min.css" rel="stylesheet">
<link href="estilo.css" rel="stylesheet">
<link rel="stylesheet" href="http://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.6.3/css/font-awesome.min.css">
<!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries -->
<!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
<!--[if lt IE 9]>
<script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script>
<script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script>
<![endif]-->
</head>
<body protegercodigo() >
<header>
<nav class="navbar navbar-default navbar-fixed-top">
<div class="container">
<!-- header -->
<div class="navbar-header">
<!-- botao toggle -->
<button type="button" class="navbar-toggle collapsed"
data-toggle="collapse" data-target="#barra-navegacao">
<span class="sr-only">alternar navegação</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a href="home.html" class="navbar-brand">
<span class="img-logo" class="img-responsive" alt="Responsive image"></span>
</a>
</div>
<!-- navbar -->
<div class="collapse navbar-collapse" id="barra-navegacao">
<ul class="nav navbar-nav navbar-right">
<li><a href="corporativo.html"><h4>Corporativo</h4></a></li>
<li><a href="contato.html"><h4>Contato</h4></a></li>
<li><a href="quemsomos.html"><h4>Quem Somos</h4></a></li>
<li><a href="acesse.html"><h4>Acesse</h4></a></li>
</ul>
</div>
</div><!-- /container -->
</nav><!-- /nav -->
</header>.img-logo {
height: 80px;
width: 320px;
display: block;
background: url('img/zem.png') no-repeat;
background-size: contain;
color: transparent;
}
.navbar-brand{
padding: 0px 5px;
}
