div.rounded-box {
    position: relative;
    width: 19em;
   /* background-color: #CCCCCC;
    margin: 10px auto;
}

/*********************
Caja Exterior
*********************/
div.top-left-corner, div.bottom-left-corner, div.top-right-corner, div.bottom-right-corner {
	position: absolute;
	width: 20px;
	height: 20px;
	background-color: #CC0000;
	overflow: hidden;
	z-index: 0;
}

div.top-left-inside, div.bottom-left-inside, div.top-right-inside, div.bottom-right-inside {
	position: relative;
	font-size: 150px;
	font-family: arial;
	color: #CCCCCC;
	line-height: 40px;
	z-index: 0;
}

/*********************
Bordes
*********************/

div.top-left-corner { top: 0px; left: 0px; }
div.bottom-left-corner {bottom: 0px; left: 0px;}
div.top-right-corner {top: 0px; right: 0px;}
div.bottom-right-corner {bottom: 0px; right: 0px;}
div.top-left-inside {left: -8px;}
div.bottom-left-inside {left: -8px; top: -17px;}
div.top-right-inside {left: -25px;}
div.bottom-right-inside {left: -25px; top: -17px;}

/*********************
Contenido (txt)
*********************/

div.box-contents {
	position: relative;
	padding: 10px;
	color:#000;
	font-weight: bolder;
	z-index: 1;
}