body{
	font-family: sans-serif;
}
div{
	width:50%;
	margin: 0 auto;
	overflow: auto;
	overflow-x: hidden;
	overflow-y: hidden;
}
div.principal{
	margin: 0 auto;
	text-align:center;
}

table{
	border-collapse: collapse;
	margin:15px auto;
}
td, th{
	padding: 5px 8px;
	text-align: center;	
	border: 1px solid black;
	font-size: 110%;	
}

th {
	background-color: aqua;
	font-weight: bold;
	color:black;
}

td{
	background-color:silver;
}

.botonGrande{
	font-weight: bold;
}


/* Círculos de colores numerados */
span.red {
  background: red;
   border-radius: 0.8em;
  -moz-border-radius: 0.8em;
  -webkit-border-radius: 0.8em;
  color: red;
  display: inline-block;
  text-align: center;
  line-height: 22px;
  width: 22px; 
}
span.green {
  background: #0ADE1E;
   border-radius: 0.8em;
  -moz-border-radius: 0.8em;
  -webkit-border-radius: 0.8em;
  color: #0ADE1E;
  display: inline-block;
  text-align: center;
  line-height: 22px;
  width: 22px;
}