<a class="hamburger" href="#cp_fullscreenmenu"></a>
<ul id="cp_fullscreenmenu">
<li><a href="#cp_fmcontent-1">1つ目のコンテンツメニュー</a></li>
<li><a href="#cp_fmcontent-2">2つ目のコンテンツメニュー</a></li>
<li><a href="#cp_fmcontent-3">3つ目のコンテンツメニュー</a></li>
<li><a href="#cp_fmcontent-4">4つ目のコンテンツメニュー</a></li>
</ul>
<div class="contents">
<div id="cp_fmcontent-1">
	<h1>1つ目のコンテンツ</h1>
	<p>1つ目のコンテンツ</p>
</div>
<div id="cp_fmcontent-2">
	<h1>2つ目のコンテンツ</h1>
	<p>2つ目のコンテンツ</p>
</div>
<div id="cp_fmcontent-3">
	<h1>3つ目のコンテンツ</h1>
	<p>3つ目のコンテンツ</p>
</div>
<div id="cp_fmcontent-4">
	<h1>4つ目のコンテンツ</h1>
	<p>4つ目のコンテンツ</p>
</div>
</div>

* {
	-webkit-box-sizing: border-box;
	        box-sizing: border-box;
}
a,
a:visited,
a:hover,
a:active {
	text-decoration: none;
	color: inherit;
}
.cp_fullscreenmenu {
	position: fixed;
	z-index: 1;
	top: 0;
	left: 0;
}
.hamburger {
  position: relative;
	margin: 0.5em;
	width: 30px;
	height: 30px;
	display: inline-block;
	border-top: 2px solid #000;
}
.hamburger:hover { color: #999 }
.hamburger:before {
	content: '';
	position: absolute;
	top: 7px;
	left: 0;
	width: 100%;
	height: 7px;
	border-top: 2px solid #000;
	border-bottom: 2px solid #000;
}
/*menuコンテンツ*/
#cp_fullscreenmenu {
	position: fixed;
	top: 0;
	left: 0;
	display: flex;
	flex-direction: column;
	width: 100%;
	height: 100%;
	margin-top: 0;
	padding-left: 0;
	list-style-type: none;
	transition: all 0.3s ease;
	transform: scale(0);
	opacity: 0;
	background-color: rgba(41,98,255,0.7);
	z-index: 999;

	align-items: center;
	justify-content: center;
}
#cp_fullscreenmenu:target {
	transform: scale(1);
	opacity: 1;
}
#cp_fullscreenmenu:target > li {
	transition: all 0.5s ease-out;
	transform: translateX(0);
	opacity: 1;
}
#cp_fullscreenmenu > li {
	transition: all 0.3s ease-out;
	transform: translateX(-100%);
	opacity: 0;
	height: 80px;
}
#cp_fullscreenmenu > li:nth-of-type(1) {
	transition-delay: 0.2s;
}
#cp_fullscreenmenu > li:nth-of-type(2) {
	transition-delay: 0.4s;
}
#cp_fullscreenmenu > li:nth-of-type(3) {
	transition-delay: 0.6s;
}
#cp_fullscreenmenu > li:nth-of-type(4) {
	transition-delay: 0.8s;
}
#cp_fullscreenmenu > li > a {
	font-size: 180%;
	color: #ffffff;
	transition: all 0.3s ease-out;
}
#cp_fullscreenmenu > li > a:hover {
	font-size: 230%;
	color: #3949AB;
}
[id^=cp_fmcontent] {
	display: none;
}
[id^=cp_fmcontent]:target {
	display: block;
}