.tb{ width:100%; margin:15px 0; border:0; }
.tb th{ background-color:#87CEFA; color:#000000 }
.tb,.tb th,.tb td {
	font-size:0.95em;
	text-align:center;
	padding:8px;
	border-collapse:collapse;
}
.tb th,.tb td {	
	border-width:1px 0 1px 0;
        border:1px solid #bae3fc;
}
.tb tr {
	border: 1px solid #bae3fc;
}
.tb tr:nth-child(odd){
	background-color:#d7eefd;
}
.tb tr:nth-child(even){
	background-color:#fdfdfd;
}