td.border-top-bottom{border-top:3px solid #000;border-bottom:3px solid #000}td.border-bottom{border-bottom:3px solid #000}td.border-right-left{border-right:3px solid #000;border-left:3px solid #000}td.border-all{border:3px solid #000}td.double-down{border-bottom:2px solid #000;box-shadow:0 2px 0 0 #fff,0 4px 0 0 #000}td.double-up{border-top:2px solid #000;box-shadow:0 -2px 0 0 #fff,0 -4px 0 0 #000}