.calculator-shell {
  grid-template-columns: minmax(0, 62%) minmax(300px, 38%);
}

.calculator-menu {
  grid-column: 1;
  grid-row: 1;
}

.estimate-panel {
  grid-column: 2;
  grid-row: 1;
}

.calculator-intro h2,
.estimate-panel h2 {
  margin-top: 0;
}

@media (max-width: 1050px) {
  .calculator-shell {
    grid-template-columns: minmax(0, 64%) minmax(280px, 36%);
  }
}

@media (max-width: 760px) {
  .calculator-menu,
  .estimate-panel {
    grid-column: auto;
    grid-row: auto;
  }
}