body
{
	margin: 0;
	padding: 0;
	font-size: 13px;
	font-weight: 400;
	text-align: left;
	background-color: #111;
	background-image: url('https://cdn.tohoku.ac/xionbg.svg');
	background-size: cover;
	background-repeat: no-repeat;
	background-position-x: center;
	background-position-y: center;
	background-attachment: fixed;
	color: #eee;
}

div.main
{
	background-color: rgba(255, 255, 255, 0.8125);
	color: #111;
	margin: 0 auto;
	overflow: auto;
}

.text-overline
{
	text-decoration-line: overline;
}

.text-center
{
	text-align: center;
}

@media (max-width: 799.98px)
{
	div.main
	{
		width: 100vw;
	}
}

@media (min-width: 800px)
{
	div.main
	{
		width: 780px;
	}
}