.calculator {
  margin: 20px 0 32px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface);
  box-shadow: var(--shadow-card);
}
.calculator h2,
.calculator h3 { margin-top: 0; }
.calculator-intro { margin-bottom: 22px; }
.calculator fieldset { border: 0; padding: 0; margin: 0 0 24px; }
.calculator legend {
  width: 100%;
  border-bottom: 1px solid var(--line);
  color: var(--navy);
  font-weight: 800;
  padding-bottom: 8px;
  margin-bottom: 16px;
}
.calc-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.calc-field label { display: block; color: var(--fg1); font-size: 15px; font-weight: 700; line-height: 1.35; margin-bottom: 6px; }
.calc-field input {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface);
  color: var(--fg1);
  font: inherit;
  padding: 9px 11px;
}
.calc-field input:focus { border-color: var(--teal-strong); outline: 3px solid rgba(47, 169, 154, .18); outline-offset: 1px; }
.calc-help { color: var(--fg2); display: block; font-size: 13px; line-height: 1.45; margin-top: 5px; }
.calc-actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 4px 0 24px; }
.calc-actions .btn { font-size: 15px; min-height: 46px; }
.calc-results { border-radius: var(--r-lg); background: var(--navy); color: #fff; padding: 22px; }
.calc-results h3 { color: #fff; margin: 0 0 16px; }
.calc-results dl { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px 18px; margin: 0; }
.calc-results dt { color: rgba(255,255,255,.72); font-size: 14px; }
.calc-results dd { color: #fff; font-variant-numeric: tabular-nums; font-weight: 800; text-align: right; }
.calc-results .primary-result { border-top: 1px solid rgba(255,255,255,.22); margin-top: 4px; padding-top: 14px; }
.calc-results dd.primary-result { color: var(--teal); font-size: 22px; }
.calc-results .calc-comparison { color: rgba(255,255,255,.82); font-size: 14px; margin: 16px 0 0; }
.calc-status { color: var(--fg2); font-size: 14px; margin-top: 12px; min-height: 1.5em; }
.non-js-note { border-left: 4px solid var(--teal); background: var(--teal-subtle); padding: 14px; }
.formula-box { border: 1px solid var(--line); border-radius: var(--r-lg); background: var(--bg-wash); padding: 22px; }
.formula-box p { margin: 0 0 8px; }
.formula-box p:last-child { margin-bottom: 0; }
@media (max-width: 640px) {
  .calc-fields { grid-template-columns: 1fr; }
  .calculator { padding: 20px 16px; }
}