@media only screen and (max-width: 800px) {
	#unseen table td:nth-child(2), 
	#unseen table th:nth-child(2) {display: none;}
}
 
@media only screen and (max-width: 640px) {
	#unseen table td:nth-child(4),
	#unseen table th:nth-child(4),
	#unseen table td:nth-child(7),
	#unseen table th:nth-child(7),
	#unseen table td:nth-child(8),
	#unseen table th:nth-child(8){display: none;}
}