.nikma-t {
  border-collapse: collapse;
  border: 1px solid black;
}

.nikma-t th,
.nikma-t td {
  text-align: left;
  padding: 3px 6px;
  border-top: 1px solid black;
}

/* Specific for columns 5 and 6. */
.nikma-t th:first-child + th + th + th + th,
.nikma-t td:first-child + td + td + td + td,
.nikma-t th:first-child + th + th + th + th + th,
.nikma-t td:first-child + td + td + td + td + td {
  text-align: center;
}