html, body {
	padding: 20px;
}

#modelo.calculadora.core2016 {
	font-weight: bold;
	font-style: italic;
	font-size: 20px;
	color: black;
	margin: 15px 0px 15px 0px;
}

#pantalla[modelo='M1'] {
	font-weight: bold;
	font-size: 15px;
	background: black;
	color: white;
	border: 2px solid #ccc;
	padding: 5px;
	outline: none;
}

#main > div#buttons {
	display: block;
	margin-top: 20px;
}

#main > div#buttons > button {
	display: inline-block;
	font-weight: bold;
	font-size: 14px;
	background: black;
	color: white;
	border: 2px solid #ccc;
	min-height: 50px;
	min-width: 30px;
	padding: 8px;
	vertical-align: top;
	outline: none;
}