.main {
  border: 1px solid grey;
}
.row {
  display: flex;
  flex-direction: row;
  align-content: space-between;
}
.cell {
  flex: 1;
  border-right: 1px solid grey;
}
.secondary {
  display: flex;
  flex-direction: row;
  align-content: space-between;
}
.secondary > div {
  flex: 1;
  border-right: 1px solid grey;
}