.calculator-shell {
  display: grid;
  gap: 2rem;
}

@media (min-width: 960px) {
  .calculator-shell {
    grid-template-columns: minmax(0, 420px) minmax(0, 1fr);
    align-items: flex-start;
  }
}

.calculator-form {
  background: rgba(15, 23, 42, 0.75);
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 1px solid rgba(56, 189, 248, 0.15);
  box-shadow: var(--shadow-sm);
}

.calculator-results {
  background: rgba(15, 23, 42, 0.55);
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 1px solid rgba(148, 163, 184, 0.12);
  box-shadow: var(--shadow-sm);
}

.calculator-results__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.results-live-region {
  min-height: 2rem;
}

.result-line {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(148, 163, 184, 0.08);
}

.result-line strong {
  font-feature-settings: "tnum" 1;
}

.result-totals {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 2px solid rgba(56, 189, 248, 0.35);
}

.disclaimer {
  font-size: 0.8rem;
  color: var(--color-muted);
  margin-top: 1.5rem;
}

.summary-box {
  background: rgba(15, 23, 42, 0.45);
  border-radius: var(--radius-md);
  padding: 1rem 1.5rem;
  border: 1px solid rgba(56, 189, 248, 0.25);
  margin-bottom: 1.5rem;
}

.summary-box__title {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.summary-box__value {
  font-size: 1.35rem;
  font-weight: 700;
}

.export-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.export-actions button {
  flex: 1 1 180px;
}

.show-math {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  white-space: pre-wrap;
}