.bt {
	float: left;
	margin: 1em;
	padding: .5em;
	border: outset 2px #ff0;
	cursor: pointer;
}

.bt:active {
	border-style: inset;
}


#import, #export {
	background: #6f0;
}

#addrow, #addcol {
	background: #fa0;
}

#import:hover, #export:hover {
	background: #af0;
}

#addrow:hover, #addcol:hover {
	background: #ff0;
}


#grid, #grid td {
	border: 1px solid #999;
	border-collapse: collapse;
	min-width: 1em;
	min-height: 1em;
	cursor: cell;
}

#grid td:hover {
	background: #acf;
}

#inout {
	float: left;
	width: 400px;
	height: 300px;
}

#content {
	border-collapse: collapse;
}
#content > tbody > tr > td {
	background-color: GhostWhite;
}
#content > tbody > tr > td + td {
	background-color: Gainsboro;
}

#content td { 
	padding: 1em;
	white-space: pre-wrap;
}