html body {
		height: 100%;
		width: 100%;
		margin: 0 auto;
	}

	body {
		background: #ECEBEC;
		margin: 0;
	}

/*パララックス*/
	div.parallax {
		width: 100%;
		height:70vh;
		background-position: center;
		background-repeat: no-repeat;
		background-attachment: fixed;
		background-size: cover;
	}
	.topimg {
		background: url(coding.jpg);
	}

	.box{
		display: flex;
	    justify-content: center;
	    align-items: center;
	    height: 100%;
	}

	.box h2{
		margin: 0;
		font-size: 60px;
		color: #fff;
	}
	nav {
		z-index: 100;
		background: black;
	}

	.active nav {
		position: fixed;
		top: 0;
		left: 0;
		right: 0;
		box-shadow: 0 5px 10px rgba(0,0,0,0.1);
	}

	.active li.logo {
		max-width: 500px;
	}
	ul {
		display: flex;
		justify-content: space-around;
	    margin: 0;
	    padding: 0;
	}
	li {
		list-style: none;
		flex: 1;
	}
	/*max-widthじゃないと反映されない(widthだとダメ)*/
	li.logo {
		max-width: 0;
		overflow: hidden;
		background: #fff;
		transition: all 0.6s;
		font-weight: 600;
	}
	li.logo a {
		color: black;
	}
	li a {
		text-align: center;
		font-weight: bold;
		color: #fff;
		text-decoration: none;
		padding: 20px 0;
		display: block;
	}
	.content {
		z-index: -1;
		background: #fff;
		max-width: 800px;
		margin: 30px auto;
	}
	
	.content p {
		padding: 2.5em 3.5em;
	}