.rule-calculator {
  display: grid;
  grid-template-columns: minmax(270px, 0.78fr) minmax(0, 1.42fr);
  border: 1px solid var(--line-strong);
  background: var(--paper);
}

.calculator-inputs {
  display: grid;
  align-content: start;
  border-right: 1px solid var(--line-strong);
  background: var(--paper-deep);
}

.calculator-inputs label {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(120px, 0.86fr);
  align-items: center;
  gap: 14px;
  min-height: 66px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 650;
}

.calculator-inputs label[hidden] { display: none; }

.calculator-inputs input,
.calculator-inputs select {
  width: 100%;
  min-width: 0;
  min-height: 44px;
  padding: 9px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  color: var(--ink);
  background: var(--paper-raised);
  font: 650 14px/1.3 var(--sans);
}

.calculator-inputs input:focus,
.calculator-inputs select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.input-prefix {
  display: grid;
  grid-template-columns: 34px 1fr;
  align-items: stretch;
}

.input-prefix b {
  display: grid;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-right: 0;
  color: var(--accent);
  background: var(--paper-raised);
  font: 700 14px/1 var(--mono);
}

.calculator-result {
  min-width: 0;
  padding: 28px;
}

.result-verdict,
.calculator-unavailable {
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line-strong);
}

.result-verdict > span,
.calculator-unavailable > span,
.calculator-formula > span,
.transition-progress > span {
  display: block;
  margin-bottom: 10px;
  color: var(--accent);
  font: 700 14px/1.2 var(--mono);
  letter-spacing: 0.04em;
}

.result-verdict > strong,
.calculator-unavailable > strong {
  display: block;
  font-family: var(--display);
  font-size: clamp(28px, 3.6vw, 46px);
  font-weight: 400;
  line-height: 1.12;
  letter-spacing: -0.025em;
}

.result-verdict > p,
.calculator-unavailable > p {
  margin: 13px 0 0;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.65;
}

.calculator-unavailable > small {
  display: block;
  margin-top: 13px;
  color: var(--ink-soft);
  font-size: 14px;
}

.result-verdict.eligible > strong { color: var(--success); }

.result-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 22px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.result-metric {
  min-height: 112px;
  padding: 16px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.result-metric > span,
.result-metric > small {
  display: block;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.45;
}

.result-metric > strong {
  display: block;
  margin: 8px 0 5px;
  font-family: var(--display);
  font-size: 28px;
  font-weight: 400;
  line-height: 1.1;
}

.calculator-formula,
.transition-progress {
  margin-top: 20px;
  padding: 17px 18px;
  border-left: 3px solid var(--accent);
  background: var(--accent-soft);
}

.calculator-formula > strong,
.transition-progress > strong {
  font-size: 16px;
  line-height: 1.6;
}

.calculator-conditions {
  display: grid;
  gap: 0;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.calculator-conditions li {
  display: grid;
  grid-template-columns: 26px 1fr;
  align-items: start;
  gap: 8px;
  padding: 13px 4px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.55;
}

.calculator-conditions li > span {
  color: var(--accent);
  font: 700 16px/1.45 var(--mono);
}

.calculator-conditions li.unmet > span { color: var(--warning); }

.transition-progress progress {
  display: block;
  width: 100%;
  height: 8px;
  margin-top: 14px;
  border: 0;
  accent-color: var(--accent);
}

.calculator-boundary {
  margin: 20px 0 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.55;
}

.calculation-basis {
  margin-top: 16px;
  border: 1px solid var(--line);
  background: var(--paper-raised);
}

.calculation-basis summary {
  min-height: 48px;
  display: flex;
  align-items: center;
  padding: 10px 16px;
  color: var(--ink);
  cursor: pointer;
  font-size: 14px;
  font-weight: 700;
}

.calculation-basis p {
  margin: 0;
  padding: 0 16px 14px;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.65;
}

@media (max-width: 980px) {
  .rule-calculator { grid-template-columns: 1fr; }
  .calculator-inputs { border-right: 0; border-bottom: 1px solid var(--line-strong); }
}

@media (max-width: 800px) {
  .calculator-result { padding: 22px 18px 26px; }
}

@media (max-width: 640px) {
  .calculator-inputs label { grid-template-columns: 1fr; gap: 7px; padding: 12px 14px; }
  .result-metrics { grid-template-columns: 1fr; }
}