$odd: #3f3f3f;
$header: #2f2f2f;
$border: #333;

table, th, td {
  border-bottom: 1px solid $border;
  border-collapse: collapse;
  padding: 5px;
}

th {
  background-color: $header;
}

tr:nth-child(odd) {
  background-color: $odd;
}