.planning-table,
.planning-row {
  width: 100%;
}

.planning-row {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.planning-row > span,
.planning-row > strong {
  display: block;
  width: 100%;
  min-width: 0;
}

@media (max-width: 760px) {
  .planning-row:not(.planning-labels) {
    width: 100%;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 420px) {
  .planning-row:not(.planning-labels) {
    grid-template-columns: 1fr;
  }
}