/* reset */
ul {
	margin: 0;
	padding: 0;
	list-style: none;
}

input[type=radio] {
	display: none;
}

/* style */
.a-container {
	width: 100%;
	margin: 20px auto;
	padding-left: 0px;
}

.a-container label {
	display: block;
	position: relative;
	cursor: pointer;
	font-size: 24px;
	font-weight: bold;
	border-radius: 12px;
	padding: 10px 20px;
	color: #aaa;
	background-color: #eee;
	border-bottom: 1px solid #ddd;
	-webkit-transition: all .2s ease;
	-moz-transition: all .2s ease;
	-ms-transition: all .2s ease;
	-o-transition: all .2s ease;
	transition: all .2s ease;
}

.a-container label:after {
	content: "";
	width: 0;
	height: 0;
	border-top: 8px solid #aaa;
	border-right: 6px solid transparent;
	border-bottom: 8px solid transparent;
	border-left: 6px solid transparent;
	position: absolute;
	right: 10px;
	top: 16px;
}

.a-container input:checked + label,
.a-container label:hover {
	background-color: #ddd;
	color: #222;
}

.a-container input:checked + label:after {
	border-top: 8px solid transparent;
	border-right: 6px solid transparent;
	border-bottom: 8px solid #222;
	border-left: 6px solid transparent;
	top: 6px;
}

.a-content {
	padding: 0 20px 20px;
	display: none;
}

.a-container input:checked ~ .a-content {
	display: block;
}