<body>
<nav class="accordion arrows">
<header class="box">
<label for="acc-close" class="box-title">Accordion menu</label>
</header>
<input type="radio" name="accordion" id="cb1" />
<section class="box">
<label class="box-title" for="cb1">Readme</label>
<label class="box-close" for="acc-close"></label>
<div class="box-content">Click on an item to open. Click on its header or the list header to close.</div>
</section>
<input type="radio" name="accordion" id="cb2" />
<section class="box">
<label class="box-title" for="cb2">Read me too</label>
<label class="box-close" for="acc-close"></label>
<div class="box-content">Add the class 'arrows' to nav.accordion to add dropdown arrows.</div>
</section>
<input type="radio" name="accordion" id="cb3" />
<section class="box">
<label class="box-title" for="cb3">Item 3</label>
<label class="box-close" for="acc-close"></label>
<div class="box-content">Vestibulum ante ipsum primis in faucibus orci luctus et ultrices posuere cubilia Curae; Quisque finibus tristique nisi, maximus ullamcorper ante finibus eget.</div>
</section>
<input type="radio" name="accordion" id="acc-close" />
</nav>
</body>body {
height: calc(100% - 20px);
width: calc(100% - 20px);
margin: 0;
padding: 10px;
display: flex;
background: #f2f2f2;
color: rgba(0,0,0,.87);
font-family: 'Roboto', sans-serif;
}
.accordion {
margin: auto;
width: 400px;
}
.accordion input {
display: none;
}
.box {
position: relative;
background: white;
height: 64px;
transition: all .15s ease-in-out;
}
.box::before {
content: '';
position: absolute;
display: block;
top: 0;
bottom: 0;
left: 0;
right: 0;
pointer-events: none;
box-shadow: 0 -1px 0 #e5e5e5,0 0 2px rgba(0,0,0,.12),0 2px 4px rgba(0,0,0,.24);
}
header.box {
background: #00BCD4;
z-index: 100;
cursor: initial;
box-shadow: 0 -1px 0 #e5e5e5,0 0 2px -2px rgba(0,0,0,.12),0 2px 4px -4px rgba(0,0,0,.24);
}
header .box-title {
margin: 0;
font-weight: normal;
font-size: 16pt;
color: white;
cursor: initial;
}
.box-title {
width: calc(100% - 40px);
height: 64px;
line-height: 64px;
padding: 0 20px;
display: inline-block;
cursor: pointer;
-webkit-touch-callout: none;-webkit-user-select: none;-khtml-user-select: none;-moz-user-select: none;-ms-user-select: none;user-select: none;
}
.box-content {
width: calc(100% - 40px);
padding: 30px 20px;
font-size: 11pt;
color: rgba(0,0,0,.54);
display: none;
}
.box-close {
position: absolute;
height: 64px;
width: 100%;
top: 0;
left: 0;
cursor: pointer;
display: none;
}
input:checked + .box {
height: auto;
margin: 16px 0;
box-shadow: 0 0 6px rgba(0,0,0,.16),0 6px 12px rgba(0,0,0,.32);
}
input:checked + .box .box-title {
border-bottom: 1px solid rgba(0,0,0,.18);
}
input:checked + .box .box-content,
input:checked + .box .box-close {
display: inline-block;
}
.arrows section .box-title {
padding-left: 44px;
width: calc(100% - 64px);
}
.arrows section .box-title:before {
position: absolute;
display: block;
content: '\203a';
font-size: 18pt;
left: 20px;
top: -2px;
transition: transform .15s ease-in-out;
color: rgba(0,0,0,.54);
}
input:checked + section.box .box-title:before {
transform: rotate(90deg);
}
/* Accordion menu with only html and CSS for reddit.com/r/css/comments/491w3v/challenge_2016_1_checkbox_hackery/ */
External CSS
External JavaScript
This Pen doesn't use any external JavaScript resources.