body{
	font-family:sans-serif;
	margin:20px;
}
textarea#input, textarea#answer{
	width:100%;
	height:150px;
	box-sizing:border-box;
}
button{
	padding:8px 16px;
	margin:5px 5px 5px 0;
	border:1px solid #999;
	background:#f0f0f0;
	cursor:pointer;
}
button.active{
	background:#4a90d9;
	color:#fff;
	border-color:#4a90d9;
}
#output, #answerOutput{
	margin-top:10px;
	border:1px solid #ccc;
	padding:10px;
	min-height:80px;
	white-space:pre-wrap;
	word-break:break-all;
}
#btnCopy:disabled{
	opacity:0.5;
	cursor:default;
}