CSS3 Accordion Menus (No Javascript) - Vertical - Single Visible

Pure HTML/CSS3 accordion menus using absolutely no javascript. This version uses vertical accordion type allowing one panel to be visible at a time.

by Stéphane Cabaret

HTML

<div class="accordion vertical">
    <ul>
        <li>
            <input type="radio" id="radio-1" name="radio-accordion" checked="checked" />
            <label for="radio-1">Title&nbsp;One</label>
            <div class="content">
                <h3>This is an example accordion item</h3>
                <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse nec posuere lorem. Pellentesque hendrerit, lorem luctus porttitor vestibulum, eros sapien mattis libero, euismod congue neque nisi at ipsum. Mauris semper ipsum sit amet metus semper malesuada. Donec vel est justo, ac porta diam.</p>
                <p>In ut est in orci commodo blandit. Cras rhoncus ultricies augue. Proin quam odio, venenatis ut tempus tristique, aliquet in velit. Pellentesque volutpat facilisis orci, ut congue mi rhoncus at. Nullam vehicula dignissim neque, sed rhoncus magna ultricies et.</p>
            </div>
        </li>
        <li>
            <input type="radio" id="radio-2" name="radio-accordion" />
            <label for="radio-2">Title&nbsp;Two</label>
            <div class="content">
                <h3>Totally another one right here</h3>
                <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse nec posuere lorem. Pellentesque hendrerit, lorem luctus porttitor vestibulum, eros sapien mattis libero, euismod congue neque nisi at ipsum. Mauris semper ipsum sit amet metus semper malesuada. Donec vel est justo, ac porta diam.</p>
                <p>In ut est in orci commodo blandit. Cras rhoncus ultricies augue. Proin quam odio, venenatis ut tempus tristique, aliquet in velit. Pellentesque volutpat facilisis orci, ut congue mi rhoncus at. Nullam vehicula dignissim neque, sed rhoncus magna ultricies et.</p>
            </div>
        </li>
        <li>
            <input type="radio" id="radio-3" name="radio-accordion" />
            <label for="radio-3">Title&nbsp;Three</label>
            <div class="content">
                <h3>I...

CSS

/*
*
*    Author:    Michael Raffaele <[email protected]>
*    Date:    25th October 2011
*    Info:     http://www.mraffaele.com/blog/2011/10/25/css-accordion-no-javascript/
*
*/

/* Shared for all accordion types */
.accordion {
    font-family:Arial, Helvetica, sans-serif; 
    margin:0 auto;
    font-size:14px;
    border:1px solid #542437;
    border-radius:10px;
    width:600px;
    padding:10px;
    background:#fff;
}
.accordion ul {
    list-style:none;
    margin:0;
    padding:0;    
}
.accordion li {
    margin:0;
    padding:0;
}
.accordion [type=radio], .accordion [type=checkbox] {
    display:none;
}
.accordion label {
    display:block;
    font-size:16px;
    line-height:16px;
    background:#D95B43;
    border:1px solid #542437;
    color:#542437;
    text-shadow:1px 1px 1px rgba(255,255,255,0.3);
    font-weight:700;
    cursor:pointer;
    text-transform:uppercase;
    -webkit-transition: all .2s ease-out;
    -moz-transition: all .2s ease-out;
}
.accordion ul li label:hover, .accordion [type=radio]:checked ~ label, .accordion [type=checkbox]:checked ~ label {
    background:#C02942;
    color:#FFF;
    text-shadow:1px 1px 1px rgba(0,0,0,0.5)
}
.accordion .content {
    padding:0 10px;
    overflow:hidden;
    border:1px solid #fff; /* Make the border match the background so it fades in nicely */
    -webkit-transition: all .5s ease-out;
    -moz-transition: all .5s ease-out;
}
.accordion p {
    color:#333;
    margin:0 0 10px;
}
.accordion h3 {
    color:#542437;
    padding:0;
    margin:10px 0;
}


/* Vertical */
.vertical ul li {
    overflow:hidden;
    margin:0 0 1px;
}
.vertical ul li label {
    padding:10px;
}
.vertical [type=radio]:checked ~ label, .vertical [type=checkbox]:checked ~ label {
    border-bottom:0;
}
.vertical ul li label:hover {
    border:1px solid #542437; /* We don't want the border to disappear on hover */
}
.vertical ul li .content {
    height:0px;
    border-top:0;
}
.vertical [type=radio]:checked ~ label ~...