Full-width background image in Bootstrap 3 - css

Question

I am able to create a full-width image background in Bootstrap 3. An example can be shown here:
body,
html {
height: 100%;
}
body {
padding-top: 50px;
}
.full {
padding: 0 !important;
margin: 0 auto !important;
background-size: cover;
overflow: hidden;
}
.wide {
width: 100%;
height: auto;
}
.logo {
color: #fff;
font-weight: 800;
font-size: 14pt;
padding: 25px;
text-align: center;
}
.line {
padding-top: 20px;
white-space: no-wrap;
overflow: hidden;
text-align: center;
}
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<div class="navbar navbar-inverse navbar-fixed-top">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Brand</a>
</div>
<div class="collapse navbar-collapse">
<ul class="nav navbar-nav">
<li class="active">Home
</li>
<li>About
</li>
</ul>
<ul class="nav navbar-nav navbar-right">
<li>Username
</li>
</ul>
</div>
<!--/.nav-collapse -->
</div>
</div>
<div class="full" style="background-image:url('https://c.stocksy.com/a/RcN300/z0/805779.jpg');">
<div class="container">
<div class="row clearfix">
<div style="padding: 0 0 200px 0;">
<div class="col-xs-5 line">
<hr>
</div>
<div class="col-xs-2 logo text-center">Logo</div>
<div class="col-xs-5 line">
<hr>
</div>
</div>
</div>
</div>
</div>
<div class="container">
<div class="text-center">
<h1>Content</h1>
</div>
</div>
<!-- /.container -->
When the page displays for Desktop, the image is shown wide covering entire area.
When the page displays for mobile, all the image now shows as if a zoom-out occurred.
What's this behavior? How can I make the image in mobile view look similar to the image displayed in desktop version?
Is this related to responsive imaging?
Thanks
/Bilal

Answer 1

This is caused by the standard behavior of cover. If you resize your desktop browser to a portrait like size, you'll see what I mean.
One option would be to use a media query, so when page is viewed in portrait mode, it will look somewhat better.
body,
html {
height: 100%;
}
body {
padding-top: 50px;
}
.full {
padding: 0 !important;
margin: 0 auto !important;
background-size: cover;
overflow: hidden;
}
.wide {
width: 100%;
height: auto;
}
.logo {
color: #fff;
font-weight: 800;
font-size: 14pt;
padding: 25px;
text-align: center;
}
.line {
padding-top: 20px;
white-space: no-wrap;
overflow: hidden;
text-align: center;
}
#media (orientation: portrait) {
.full {
background-size: 200% auto;
background-position: top right;
}
}
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet" />
<div class="navbar navbar-inverse navbar-fixed-top">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Brand</a>
</div>
<div class="collapse navbar-collapse">
<ul class="nav navbar-nav">
<li class="active">Home
</li>
<li>About
</li>
</ul>
<ul class="nav navbar-nav navbar-right">
<li>Username
</li>
</ul>
</div>
<!--/.nav-collapse -->
</div>
</div>
<div class="full" style="background-image:url('https://c.stocksy.com/a/RcN300/z0/805779.jpg');">
<div class="container">
<div class="row clearfix">
<div style="padding: 0 0 400px 0;">
<div class="col-xs-5 line">
<hr>
</div>
<div class="col-xs-2 logo text-center">Logo</div>
<div class="col-xs-5 line">
<hr>
</div>
</div>
</div>
</div>
</div>
<div class="container">
<div class="text-center">
<h1>Content</h1>
</div>
</div>
<!-- /.container -->