Pure CSS collapse/expand div - css

Question

I have a pure CSS collapsable div which is based on someone else's code who uses the :target psuedoclass. What I am trying to set up is a page with 12+ questions, and when you click on the + button the answer div expands beneath. I cannot figure out how to make multiple collapsing div elements on this page without writing a ton of extra CSS. Anyone have suggestions on how to write this so my CSS code is minimized? (i.e., so i dont have to input a bunch of unique selectors for each of the 12+ questions).
I cannot use Javascript since this is going on a wordpress.com site which does not allow JS.
Here is my jfiddle: http://jsfiddle.net/dmarvs/94ukA/4/
<div class="FAQ">
+
-
<div class="question"> Question Question Question Question Question Question Question Question Question Question Question? </div>
<div class="list">
<p>Answer Answer Answer Answer Answer Answer Answer Answer Answer Answer Answer Answer Answer Answer Answer Answer Answer Answer </p>
</div>
</div>
/* source: http://www.ehow.com/how_12214447_make-collapsing-lists-java.html */
.FAQ {
vertical-align: top;
height:auto !important;
}
.list {
display:none;
height:auto;
margin:0;
float: left;
}
.show {
display: none;
}
.hide:target + .show {
display: inline;
}
.hide:target {
display: none;
}
.hide:target ~ .list {
display:inline;
}
/*style the (+) and (-) */
.hide, .show {
width: 30px;
height: 30px;
border-radius: 30px;
font-size: 20px;
color: #fff;
text-shadow: 0 1px 0 #666;
text-align: center;
text-decoration: none;
box-shadow: 1px 1px 2px #000;
background: #cccbbb;
opacity: .95;
margin-right: 0;
float: left;
margin-bottom: 25px;
}
.hide:hover, .show:hover {
color: #eee;
text-shadow: 0 0 1px #666;
text-decoration: none;
box-shadow: 0 0 4px #222 inset;
opacity: 1;
margin-bottom: 25px;
}
.list p{
height:auto;
margin:0;
}
.question {
float: left;
height: auto;
width: 90%;
line-height: 20px;
padding-left: 20px;
margin-bottom: 25px;
font-style: italic;
}

Answer 1

Depending on what browsers/devices you are looking to support, or what you are prepared to put up with for non-compliant browsers you may want to check out the <summary> and <detail> tags. They are for exactly this purpose. No css is required at all as the collapsing and showing are part of the tags definition/formatting.
I've made an example here:
<details>
<summary>This is what you want to show before expanding</summary>
<p>This is where you put the details that are shown once expanded</p>
</details>
Browser support varies. Try in webkit for best results. Other browsers may default to showing all the solutions. You can perhaps fallback to the hide/show method described above.

Answer 2

Using <summary> and <details>
Using <summary> and <details> elements is the simplest but see browser support as current IE is not supporting it. You can polyfill though (most are jQuery-based). Do note that unsupported browser will simply show the expanded version of course, so that may be acceptable in some cases.
/* Optional styling */
summary::-webkit-details-marker {
color: blue;
}
summary:focus {
outline-style: none;
}
<details>
<summary>Summary, caption, or legend for the content</summary>
Content goes here.
</details>
See also how to style the <details> element (HTML5 Doctor) (little bit tricky).
Pure CSS3
The :target selector has a pretty good browser support, and it can be used to make a single collapsible element within the frame.
.details,
.show,
.hide:target {
display: none;
}
.hide:target + .show,
.hide:target ~ .details {
display: block;
}
<div>
<a id="hide1" href="#hide1" class="hide">+ Summary goes here</a>
<a id="show1" href="#show1" class="show">- Summary goes here</a>
<div class="details">
Content goes here.
</div>
</div>
<div>
<a id="hide2" href="#hide2" class="hide">+ Summary goes here</a>
<a id="show2" href="#show2" class="show">- Summary goes here</a>
<div class="details">
Content goes here.
</div>
</div>

Answer 3

#gbtimmon's answer is great, but way, way too complicated. I've simplified his code as much as I could.
#answer,
#show,
#hide:target {
display: none;
}
#hide:target + #show,
#hide:target ~ #answer {
display: inherit;
}
Show
Hide
<div id="answer"><p>Answer</p></div>

Answer 4

You just need to iterate the anchors in the two links.
+
-
See this jsfiddle http://jsfiddle.net/eJX8z/
I also added some margin to the FAQ call to improve the format.

Answer 5

Or a super simple version with barely any css :)
<style>
.faq ul li {
display:block;
float:left;
padding:5px;
}
.faq ul li div {
display:none;
}
.faq ul li div:target {
display:block;
}
</style>
<div class="faq">
<ul>
<li>Question 1
<div id="question1">Answer 1 </div>
</li>
<li>Question 2
<div id="question2">Answer 2 </div>
</li>
<li>Question 3
<div id="question3">Answer 3 </div>
</li>
<li>Question 4
<div id="question4">Answer 4 </div>
</li>
<li>Question 5
<div id="question5">Answer 5 </div>
</li>
<li>Question 6
<div id="question6">Answer 6 </div>
</li>
</ul>
</div>
http://jsfiddle.net/ionko22/4sKD3/