<div class="contents">
	<h1>Contents</h1>
	<p>コンテンツ</p>
</div>
<div class="cp_fullscreenmenu">
<input type="checkbox" id="toggle" />
<label class="hamburger" for="toggle">
	<div class="bar"></div>
	<div class="bar"></div>
	<div class="bar"></div>
</label>
<div class="menu">
	<ul>
		<li><a href="#">About</a></li>
		<li><a href="#">Products</a></li>
		<li><a href="#">Blog</a></li>
		<li><a href="#">Contact</a></li>
	</ul>
</div>
</div>

* {
	-webkit-box-sizing: border-box;
	        box-sizing: border-box;
}
a,
a:visited,
a:hover,
a:active {
	text-decoration: none;
	color: inherit;
}
input {
	display: none;
}
/*menuコンテンツ*/
.cp_fullscreenmenu .menu {
	position: fixed;
	top: 0;
	left: 0;
	visibility: hidden;
	width: 100%;
	height: 100%;
	transition: all 0.3s ease-in-out;
	opacity: 0;
	background-image: linear-gradient(to top, rgba(68,129,235,0.7) 0%, rgba(4,190,254,0.7) 100%);
}
.cp_fullscreenmenu .menu ul {
	position: absolute;
	top: 170px;
	left: 50%;
	margin: 0;
	padding: 0;
	list-style-type: none;
	transition: all 0.3s ease-in-out;
	-webkit-transform: translateX(-50%);
	        transform: translateX(-50%);
}
.cp_fullscreenmenu .menu ul li {
	-webkit-transform: translateY(50px);
	        transform: translateY(50px);
	opacity: 0;
}
.cp_fullscreenmenu .menu ul li a {
	font-size: 2em;
	font-weight: bold;
	display: block;
	padding: 10px 0;
	transition: all 0.2s ease-in-out;
	text-align: center;
	text-decoration: none;
	color: #ffffff;
	text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}
.cp_fullscreenmenu .menu ul li a:hover {
	color: rgba(236,64,122 ,1);
}
/*クリックしたらメニューが開閉の動作*/
.cp_fullscreenmenu #toggle:checked ~ .menu {
	visibility: visible;
	opacity: 1;
}
.cp_fullscreenmenu #toggle:checked ~ .menu ul {
	top: 70px;
}
.cp_fullscreenmenu #toggle:checked ~ .menu ul li {
	-webkit-transform: translateY(0px);
	        transform: translateY(0px);
	opacity: 1;
}
.cp_fullscreenmenu #toggle:checked ~ .menu ul li:nth-child(1) {
	transition: all 0.3s cubic-bezier(0.6, 0, 0.8, 1.5) 0.1s;
}
.cp_fullscreenmenu #toggle:checked ~ .menu ul li:nth-child(2) {
	transition: all 0.3s cubic-bezier(0.6, 0, 0.8, 1.5) 0.2s;
}
.cp_fullscreenmenu #toggle:checked ~ .menu ul li:nth-child(3) {
	transition: all 0.3s cubic-bezier(0.6, 0, 0.8, 1.5) 0.3s;
}
.cp_fullscreenmenu #toggle:checked ~ .menu ul li:nth-child(4) {
	transition: all 0.3s cubic-bezier(0.6, 0, 0.8, 1.5) 0.4s;
}
.cp_fullscreenmenu #toggle:checked + label.hamburger .bar {
	background-color: rgba(255,255,255 ,1);
}
.cp_fullscreenmenu #toggle:checked + label.hamburger .bar:nth-child(2) {
	-webkit-transform: translateX(50px);
	        transform: translateX(50px);
	opacity: 0;
}
.cp_fullscreenmenu #toggle:checked + label.hamburger .bar:nth-child(1) {
	-webkit-transform: translateY(10px) rotate(45deg);
	        transform: translateY(10px) rotate(45deg);
}
.cp_fullscreenmenu #toggle:checked + label.hamburger .bar:nth-child(3) {
	-webkit-transform: translateY(-8px) rotate(-45deg);
	        transform: translateY(-8px) rotate(-45deg);
}

/*ハンバーガー*/
.cp_fullscreenmenu .hamburger {
	position: fixed;
	z-index: 10;
	top: 10px;
	right: 10px;
	display: block;
	cursor: pointer;
}
.cp_fullscreenmenu .hamburger .bar {
	width: 30px;
	height: 2px;
	margin: 7px auto;
	transition: all 0.3s ease-in-out;
	background-color: rgba(240,98,146 ,1);
}
.cp_fullscreenmenu .hamburger .bar:nth-child(2) {
	width: 20px;
}