nav {
	color: #fff;
	position: absolute;
	width: 100%;
	height: 100%;
	top: 0;
	left: 0;
	background-color: transparent;
	z-index: 9;
	display: none;
}
.menu_overlay {
	position: fixed;
	width: 100%;
	height: 100%;
	top: 0;
	left: 0;
	background-color: #000;
	opacity: 0.8;
	z-index: -1;
}
.menu_btn {
	width: 31px;
	height: 22px;
	/*position: relative;*/
	overflow: visible;
	line-height: 13px;
	font-size: 1px;
/*	float: left;*/
	cursor: pointer;
	-webkit-transition: all 400ms ease-out 0ms;
	-moz-transition: all 400ms ease-out 0ms;
	-o-transition: all 400ms ease-out 0ms;
	transition: all 400ms ease-out 0ms;
}
.menu_btn .line {
	position: absolute;
	background-color: #222;
	overflow: hidden;
	z-index: 1;
	width: 35px;
	height: 2px;
	left: 0;
	-webkit-transition: all 400ms ease-out 0ms;
	-moz-transition: all 400ms ease-out 0ms;
	-o-transition: all 400ms ease-out 0ms;
	transition: all 400ms ease-out 0ms;
}

.menu_btn .line:nth-child(1) {
	top: 0px;
	z-index: 2;
}
.menu_btn .line:nth-child(2) {
	top: 10px;
	z-index: 2;
}
.menu_btn .line:nth-child(3) {
	top: 20px;
	z-index: 2;
}
.btn_wrapper {
	z-index: 999;
	position: absolute;
	margin-top: 12px;
}


/* メニューオープン時のクリックボタン */
.btn_wrapper.clicked .menu_btn .line {
	background-color: #FFF;
}
.btn_wrapper.clicked .menu_btn .line:nth-child(1) {
	-webkit-transform: translateY(10px) rotate(45deg);
	transform: translateY(10px) rotate(45deg);
	-webkit-transition: all 400ms ease-out 0ms;
	-moz-transition: all 400ms ease-out 0ms;
	-o-transition: all 400ms ease-out 0ms;
	transition: all 400ms ease-out 0ms;
}
.btn_wrapper.clicked .menu_btn .line:nth-child(2) {
	opacity: 0;
	-webkit-transition: all 400ms ease-out 0ms;
	-moz-transition: all 400ms ease-out 0ms;
	-o-transition: all 400ms ease-out 0ms;
	transition: all 400ms ease-out 0ms;
}
.btn_wrapper.clicked .menu_btn .line:nth-child(3) {
	-webkit-transform: translateY(-10px) rotate(-45deg);
	transform: translateY(-10px) rotate(-45deg);
	-webkit-transition: all 400ms ease-out 0ms;
	-moz-transition: all 400ms ease-out 0ms;
	-o-transition: all 400ms ease-out 0ms;
	transition: all 400ms ease-out 0ms;
}

nav ul {
	margin: 110px 0 0 0;
	width: 100%;
	position: relative;
	display: inline-block;
}
nav ul li {
	text-align: center;
	font-size: 25px;
	line-height: 1.5;
}
nav ul li a {
	color: #fff;
	text-decoration: none;
}