@media only screen and (max-width: 800px) {
#unseen table td:nth-child(2),

}
 
@media only screen and (max-width: 640px) {
#unseen table td:nth-child(4),
#unseen table td:nth-child(7),
#unseen table td:nth-child(8),

}



#unseen table {border-collapse:collapse;margin-top:7px;font-size:12px; font-family:arial}
#unseen table  tr:nth-child(2n+1){background:#eae9e9;}
#unseen table  tr td{border:1px solid #ccc;text-align:center;}
#unseen table  tr th{border:1px solid #ccc;background:#7f7f7f;color:#fff;text-align:center;width:20px}
#unseen table  tr td a{color:red; text-decoration:none}