Pure CSS Accordion Issue - css

Question

I'm playing around with a pure CSS accordion http://reversl.net/accordion/ I can get the basic functionality to work (headings 2 & 3 both toggle) But I can't get heading 1 to toggle if I add the same UL to it. Because Heading 1 is styled differently the problem (I think) lies within naming/targeting it's + div ?
Please note: I removed the UL from Heading 1 for the sake of the demo because it was preventing Headings 2 & 3 from toggling.

Answer 1

You made several mistakes. Too many to count:
Here is a working example: Try and see, what I changed
http://jsfiddle.net/HerrSerker/ASqE9/
HTML
<div id="wrap">
<div class="accordion">
<div id="two" class="section">
<h4>
Heading 2
</h4>
<div class="sub_section">
<ul class="list">
<li>Sample Text 1</li>
<li class="last">Sample Text 2</li>
</ul>
</div>
</div><!--#two-->
<div id="four" class="section progress">
<h4>
Heading 4 (With Progress Bar)
</h4>
<div class="metrics">
<div class="meter">
<span style="width: 75%"></span>
</div><!--.meter-->
</div><!--.metrics-->
<div class="sub_section">
<ul class="list">
<li>Sample Text 1</li>
<li class="last">Sample Text 2</li>
</ul>
</div><!--.sub_section-->
</div><!--#one-->
</div><!--accordian-->
</div>​
CSS
#wrap {
width: 320px;
background: #f0f0f0;
margin: auto;
}
.accordion {
clear: both;
padding: 0;
margin: 0 auto;
}
.accordion h4 {
margin: 0;
}
.accordion h4 a {
padding: 1em;
color: #999;
display: block;
font-weight: normal;
text-decoration: none;
}
.accordion h4 a:hover {
text-decoration: none;
background: #111;
}
.accordion .section {
background: #222;
border-bottom: 1px solid #000;
}
.accordion .sub_section {
border-bottom: none;
background: #f0f0f0;
}
.list {
padding: 0;
margin: 0;
}
.list li {
background: url('http://www.placehold.it/40x40') no-repeat;
color: #999;
list-style: none;
padding: .7em .7em .7em 4em;
border-bottom: 1px solid #fff;
}
.list .last {
border-bottom: none;
}
.accordion .sub_section {
height: 0;
overflow: hidden;
-webkit-transition: height 0.3s ease-in;
-moz-transition: height 0.3s ease-in;
-o-transition: height 0.3s ease-in;
-ms-transition: height 0.3s ease-in;
transition: height 0.3s ease-in;
}
.accordion :target h4 a {
text-decoration: none;
font-weight: bold;
}
.accordion :target .sub_section {
height: 80px;
}
.accordion .section.large:target h4 + div {
overflow: auto;
}
.accordion p {
color: #646464;
}
.accordion .progress .meter {
width: 90%;
height: 2px;
position: relative;
background: #555;
margin: -.9em auto .5em auto;
padding: 1px;
}
.meter > span {
height: 2px;
display: block;
background-color: #f0f0f0;
position: relative;
overflow: hidden;
}
​

Answer 2

This is because the class "progress" assigned to the div id="one" that keeps constant the size of the div with the content.