html{
	width:100%;
	height:100%;
	box-sizing: border-box;
}

body{
	background:#fff;
	border:0px solid red;
	width:100%;
	height:100%;
	box-sizing: border-box;
	margin:0px;
	padding:0px;
	font-family:Arial, Helvetica, sans-serif;
	text-align:center;
}



.table_para_centrar{
	border: 0px solid #fff;
	width: 100%;
	height: 100%;
	border-collapse: collapse;
    border-spacing: 0px;
}

.td_para_centrar {
    border: 0px solid green;
    text-align: center;
    color: #818181;
    font-size: 21px;
    padding: 1px;
}

.pantalla {
    width: 100%;
    max-width: 178px;
    border-bottom: 1px solid #d1d1d1;
    padding-bottom: 9px;
}