@media only screen and (min-width: 0px) and (max-width: 850px) {
	table.assinatura{
		display: inline-block;
		float:none;
	}
	table.assinatura tr,
	table.assinatura td{
		display: inline-block;
		float:none;
		width: 100%;
		height: auto !important;
		text-align: center;
	}
}