I was wondering how can I make my background image using bootstrap 'img-responsive'? The background image is with in herodiv
<!DOCTYPE html>
<html>
<head>
<html lang="en">
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Liam Docherty Digital Portfolio</title>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<link rel="stylesheet" href="css/style.css">
<style>
body {
margin: 0;
padding: 0;
}
.navbar.navbar-default {
background-color: #4D5061;
height: 10vh;
z-index: 100;
}
.navbar.navbar-default ul {
list-style-type: none;
text-align: right;
}
.navbar.navbar-default ul li {
display: inline-block;
}
.dropdown-menu li {
text-align: center
}
.dropdown .dropdown-menu {
background-color: #4D5061;
}
.dropdown .dropdown-menu a {
color: white;
}
.navbar.navbar-default ul li a {
display: inline-block;
padding: 3.5vh 8px 4px;
color: white;
text-decoration: none;
font-size: 14pt;
font-family: 'Roboto', sans-serif;
}
.navbar.navbar-default ul li:after {
content: '';
position: absolute;
right: 50%;
bottom: 0;
left: 50%;
height: 3px;
background-color: #FFFFFF;
border-radius: 9px;
transition: all .2s;
}
.navbar.navbar-default ul li a:hover {
color: white;
}
.nav.navbar-nav,
.nav.navbar-nav>li {
float: none;
}
.navbar.navbar-default ul li:hover:after {
right: 0;
left: 0;
}
.nav-title {
font-size: 14pt;
margin: 0;
top: 35px;
left: 50px;
width: 100%;
position: absolute;
text-align: center;
color: white;
font-family: 'Roboto', sans-serif;
}
.navbar.navbar-default ul.dropdown-menu li,
.navbar.navbar-default ul.dropdown-menu li a {
position: relative;
display: block;
}
#logo {
padding-top: 2vh;
padding-left: 20px;
float: left;
}
.hero {
background-image: url("https://static.pexels.com/photos/48727/pexels-photo-48727.jpeg");
background-attachment: fixed;
position: relative;
text-align: center;
width: 100%;
max-width: 100%;
width: 100vw;
height: 100%;
}
section {
position: relative;
height: 95vh;
}
.section1 {
height: 100vh;
text-align: center;
color: white;
}
.section2 {
background-color: #11B5E4;
text-align: center;
color: white;
}
.section3 {
background-color: #FFFFFF;
text-align: center;
color: white;
}
.fa-angle-down {
color: #4D5061;
position: absolute;
bottom: 0px;
}
.fa-angle-up {
color: #4D5061;
position: absolute;
bottom: 0px;
}
.footer {
height: 6vh;
background-color: #4D5061;
padding: 0;
right: 0;
bottom: 0;
left: 0;
}
.footertext {
font-size: 14pt;
color: white;
font-family: 'Roboto', sans-serif;
text-align: center;
}
.profile.box {
bottom: 0;
height: 50%;
left: 0;
margin: auto;
position: absolute;
right: 0;
top: 0;
width: 50%;
}
.shape {
border-radius: 25px;
background: #4D5061;
content: url(http://i1126.photobucket.com/albums/l611/ldocherty1/IMG_0730_zpsiz4dqc47.jpg);
color: white;
height: 250px;
margin: auto;
padding: 3px;
width: 250px;
}
.shape2 {
background: linear-gradient(35deg, #4D5061, #4D5061);
border-radius: 85px;
color: white;
height: 40px;
margin: 1% auto;
opacity: 0.9;
padding: 0px;
width: 250px;
}
</style>
</head>
<body>
<nav class="navbar navbar-default navbar-fixed-top">
<div class="container-fluid">
<!-- Brand and toggle get grouped for better mobile display -->
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#"><img src="http://placehold.it/60x60" alt="Your Brand Name"></a>
<h1 class="nav-title">Liam Docherty's Digital Portfolio</h1>
</div>
<!-- Collect the nav links, forms, and other content for toggling -->
<div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
<ul class="nav navbar-nav">
<li><a href="#">Home</a>
</li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="true">About Me <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">Action</a>
</li>
<li><a href="#section3">Contact</a>
</li>
<li><a href="#">Something else here</a>
</li>
<li><a href="#">Separated link</a>
</li>
<li><a href="#">One more separated link</a>
</li>
</ul>
</li>
<li class="dropdown">
<a href="#" class="dropdown-toggle" data-toggle="dropdown" role="button" aria-haspopup="true" aria-expanded="false">Units <span class="caret"></span></a>
<ul class="dropdown-menu">
<li><a href="#">Action</a>
</li>
<li><a href="#">Another action</a>
</li>
<li><a href="#">Something else here</a>
</li>
<li><a href="#">Separated link</a>
</li>
<li><a href="#">One more separated link</a>
</li>
</ul>
</li>
<li><a href="#">Clients</a>
</li>
<li><a href="#contact-me">Contact Me</a>
</li>
</ul>
</div>
<!-- /.navbar-collapse -->
</div>
<!-- /.container-fluid -->
</nav>
<section id="section1" class="section1">
<div class="hero">
<div class="profile box">
<div class="shape"></div>
<div class="shape2">
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</div>
</div>
</div>
<a href="#section2"><i class="fa fa-angle-down" style="font-size:100px;"></i></a>
</section>
</html>
