table.tarifs {
	border: 2px solid #ffffff;
	width: 520px;
}

table.tarifs td {
	border-right: 2px solid #ffffff;
	border-bottom: 2px solid #ffffff;
}
table.tarifs th {
	border-right: 2px solid #ffffff;
	border-bottom: 3px solid #ffffff;
}

table.tarifs, td, th {
	border-collapse: collapse;
}