header {
    display: flex;
    align-items: center;
    background-color: white;
}

	/*** ハンバーガーメニュー *****/
	
	.menu-btn {
		position: absolute;
		top: 15px;
		left: 20px;
		display: flex;
		height: 15px;
		width: 15px;
		justify-content: center;
		align-items: center;
	}

	.menu-btn::before {
		content: "";
		position: absolute;
		z-index: -10;
		display: flex;
		height: 25px;
		width: 25px;
		justify-content: center;
		align-items: center;
		background-color:transparent;
	}

	.menu-btn span {
		content: '';
		display: block;
		height: 3px;
		width: 20px;
		border-radius: 0px;
		background-color: black;
		position: absolute;
	}
	.menu-btn span:before,
	.menu-btn span:after {
		content: '';
		display: block;
		height: 3px;
		width: 20px;
		border-radius: 0px;
		background-color: black;
		position: absolute;
	}
	.menu-btn span:before {
		bottom: 6px;
	}
	.menu-btn span:after {
		top: 6px;
	}
	#menu-btn-check:checked ~ .menu-btn span {
		background-color: rgba(255, 255, 255, 0);/*メニューオープン時は真ん中の線を透明にする*/
	}
	#menu-btn-check:checked ~ .menu-btn span::before {
		bottom: 0;
		transform: rotate(45deg);
		background-color: black;
	}
	#menu-btn-check:checked ~ .menu-btn span::after {
		top: 0;
		transform: rotate(-45deg);
		background-color: black;
	}
	#menu-btn-check {
		display: none;
	}
	.menu-content {
		width: 100%;
		height: 100%;
		position: fixed;
		top: 0;
		left: 0;
		background-color:white;
	}
	.menu-content ul {
		padding: 10px 10px 0;
	}
	.menu-content ul li a {
		display: block;
		width: 100%;
		font-size: 20px;
		box-sizing: border-box;
		color:black;
		text-decoration: none;
		padding-left: 10px;
		position: relative;
	}
	.menu-content {
		width: 100%;
		height: 100%;
		position: fixed;
		top: 0;
		left: -100%;/*leftの値を変更してメニューを画面外へ*/
		opacity: 1;
		transition: all 0.5s;/*アニメーション設定*/
	}
	#menu-btn-check:checked ~ .menu-content {
		left: 0;/*メニューを画面内へ*/
	}
	/*** ハンバーガーメニュー *****/