style.css
	@import url(bootstrap.min.css);
	body,
	pre {
	font-family: "游ゴシック Medium", "游ゴシック体", "Yu Gothic Medium", YuGothic, sans-serif;
	}
	header {
	text-align: center;
	position: fixed;
	top: 0;
	left: 0;
	width: 300px;
	height: 100vh;
	background-color: #7CA4D7
	}
	header h1 {
	font-size: 100%;
	margin-top: 30px;
	}
	header h1 span {
	display: block;
	}
	main {
	margin-left: 300px;
	padding: 30px;
	}
	main h2 {
	font-size: 120%;
	text-shadow: 1px 1px 3px #999;
	}
	main h2 img {
	height: 1em;
	}
	pre {
	min-height: 100px;
	padding: 10px;
	background-color: #e3f2ff;
	box-shadow: 1px 1px 5px #eee;
	width: 500px;
	}
	hr {
	border-color: #7CA4D7;
	}
	.content {
	margin-top: 30px;
	}
	form {
	margin-top: 50px;
	}
	time {
	color: #999;
	font-size: 80%;
	}
	article {
	margin-top: 30px;
	}