tr:nth-child(even) {background: #EEE}
table {border-collapse: collapse; border: 1px solid black}
td {border: 1px solid black; border-top: 0px; border-bottom: 0px}
-td:first-child {border-left: 0px}
-td:last-child {border-right: 0px}
-th {border: 1px solid black; border-top: 0px; border-bottom: 0px}
-th:first-child {border-left: 0px}
-th:last-child {border-right: 0px}
+th {border: 1px solid black}
+