body {
	margin: 0;
	padding: 0;
}

table {
	border-collapse: collapse;
	margin: 0 auto;
	padding: 0;
}

td {
	margin: 0;
	padding: 0;
}

table#display {
	width: 150px;
	height: 30px;
	border: 1px solid #999;
	margin-top: 10px;
}

td#output {
	font: normal 10pt "Helvetica Neue", Helvetica, sans-serif;
	text-align: right;
	margin: 0;
	padding: 0 10px;
}

table#button input {
	width: 30px;
	height: 30px;
}

input#zero, input#one, input#two,
input#three, input#four, input#five, input#six,
input#seven, input#eight, input#nine, input#dot {
	background: #fff;
}

input#zero:hover, input#one:hover, input#two:hover,
input#three:hover, input#four:hover, input#five:hover, input#six:hover,
input#seven:hover, input#eight:hover, input#nine:hover, input#dot:hover {
	background: #eee;
}

input#equal {
	background: #fec;
}

input#equal:hover {
	background: #fc9;
}

input#plus, input#c, input#minus, input#ce,
input#multiply, input#percent, input#divide, input#sqrt {
	background: #eee;
}

input#plus:hover, input#c:hover, input#minus:hover, input#ce:hover,
input#multiply:hover, input#percent:hover, input#divide:hover, input#sqrt:hover {
	background: #ddd;
}