* {
 	box-sizing: border-box;
}

body {
	font-family: Sans-Serif;
	margin: 0;
}

a {
	text-decoration: none;
}
a:hover {
	text-decoration: underline;
}

button,
img[onclick],
label[clickable],
input[type="radio"],
input[type="submit"] {
	cursor: pointer;
}

div[header] {
	font-size: 14px;
	background-color: #ddd;
	padding: 8px 3%;
	display: flex;
	justify-content: space-between;
	z-index: 1;
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
}
div[padding] {
	height: 32px;
}

[content] {
	margin-left: 3%;
	margin-right: 3%;
	margin-bottom: 2em;
}

@media print {
	div[header],
	div[padding] {
		display: none;
	}
}

span[pulldown] {
	position: relative;
}

span[pulldown] > div {
	display: none;
	right: 100%;
	z-index: 2;
	position: absolute;
	border: 1px solid #cccccc;
	border-radius: 4px;
	text-align: left;
	background-color: #eeeeee;
	padding: 5px 0;
}

span[pulldown] > div > span {
	white-space: nowrap;
	display: block;
	padding: 8px 16px;
	cursor: pointer;
}

span[pulldown] > div > span:hover {
	color: #ffffff;
	background-color: #428bca;
}

ruby rt {
	user-select: none;
}

pre,
code {
	text-wrap: wrap;
}