.tomkat-calculator-tightness-test,
.tomkat-calculator-tightness-test * {
  box-sizing: border-box;
}

.tomkat-calculator-tightness-test input,
.tomkat-calculator-tightness-test select,
.tomkat-calculator-tightness-test button {
  max-width: 100%;
}

@media (max-width: 600px) {
  .tomkat-calculator-tightness-test [style*="grid-template-columns:1fr 1fr"] {
    grid-template-columns: 1fr !important;
  }
}