Bootstrap 3 Collapse Horizontally

Only Css

by Kyle Bellamy

HTML

<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css">
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
<div class="container">
    <div class="row">
        <div class="content">
            <div class="panel-group" id="accordion">
                <div class="panel panel-default">
                    <div class="panel-heading">
                         <h4 class="panel-title">
                        <a data-toggle="collapse" data-parent="#accordion" href="#collapseOne">
                          Accordion 1
                        </a>
                      </h4>

                    </div>
                    <div id="collapseOne" class="panel-collapse collapse">
                        <div class="panel-body">
                            <p><h1>Title</h1><br>A paragraph of text about something pertinant to the site which people could read should the feel the need to read about it. They could skip it as well but this keeps the initial view a good deal less text heavy, see?<br>- Some Source</p>
                        </div>
                    </div>
                </div>
                
            </div>
        </div>
    </div>
</div>

CSS

html, body {
    background-color:#e9eaed;
}
.content {
    width:960px;
    height:0px;
    margin-right: auto;
    margin-left: auto;
}
.panel-group {
    width:430px;
    z-index: 100;
    -webkit-backface-visibility: hidden;
    -webkit-transform: translateX(-100%) rotate(-90deg);
    -webkit-transform-origin: right top;
    -moz-transform: translateX(-100%) rotate(-90deg);
    -moz-transform-origin: right top;
    -o-transform: translateX(-100%) rotate(-90deg);
    -o-transform-origin: right top;
    transform: translateX(-100%) rotate(-90deg);
    transform-origin: right top;
}
.panel-heading {
    width: 430px;
}
.panel-title {
    height:18px
}
.panel-title a {
    float:right;
    text-decoration:none;
    padding: 10px 430px;
    margin: -10px -430px;
}
.panel-body {
    height:830px;
}
.panel-group img {
    -webkit-backface-visibility: hidden;
    -webkit-transform: translateX(0%) rotate(90deg);
    -webkit-transform-origin: left top;
    -moz-transform: translateX(0%) rotate(90deg);
    -moz-transform-origin: left top;
    -o-transform: translateX(0%) rotate(90deg);
    -o-transform-origin: left top;
    transform: translateX(0%) rotate(90deg);
    transform-origin: left top;
}
.panel-group p {
    -webkit-backface-visibility: hidden;
    -webkit-transform: translateX(0%) rotate(90deg);
    -webkit-transform-origin: left top;
    -moz-transform: translateX(0%) rotate(90deg);
    -moz-transform-origin: left top;
    -o-transform: translateX(0%) rotate(90deg);
    -o-transform-origin: left top;
    transform: translateX(0%) rotate(90deg);
    transform-origin: left top;
}
.panel-group .panel img {
    margin-left:400px;
    position: absolute;
}