.hvac-calculator-page {
  --calc-bg: var(--paper);
  --calc-card: var(--white);
  --calc-ink: var(--ink);
  --calc-muted: var(--muted);
  --calc-line: var(--line);
  --calc-accent: var(--orange);
  --calc-accent-ink: var(--ink);
  --calc-accent-soft: #f6e3d9;
  color-scheme: light;
  background: var(--calc-bg);
  color: var(--calc-ink);
  font: 16px/1.55 var(--crew-body);
}

.hvac-calculator-page a {
  color: var(--calc-accent);
}

.hvac-calculator-page .site-header .quiet-link {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
}

.hvac-calculator-page .tool-wrap {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 16px;
}

.hvac-calculator-page nav.crumbs {
  margin: 4px 0 0;
  color: var(--calc-muted);
  font-size: 13px;
  line-height: 1.5;
}

.hvac-calculator-page nav.crumbs a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--calc-muted);
}

.hvac-calculator-page .tool-main {
  padding-bottom: 1px;
}

.hvac-calculator-page .tool-main .eyebrow {
  display: block;
  margin: 24px 0 6px;
  color: var(--calc-muted);
  font-size: 12px;
  letter-spacing: .08em;
}

.hvac-calculator-page .tool-main .eyebrow::before {
  content: none;
}

.hvac-calculator-page .tool-main h1 {
  max-width: none;
  margin: 0 0 10px;
  font-family: var(--crew-heading);
  font-size: clamp(28px, 7vw, 40px);
  line-height: 1.12;
  letter-spacing: -.01em;
  text-transform: none;
}

.hvac-calculator-page .tool-main h2 {
  margin: 36px 0 10px;
  font-family: var(--crew-heading);
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: 0;
  text-transform: none;
}

.hvac-calculator-page .tool-main .lede {
  margin: 0 0 20px;
  color: var(--calc-muted);
  font-size: 18px;
}

.hvac-calculator-page .tool-main label {
  display: inline;
  margin: 0;
  font-size: inherit;
  font-weight: 600;
}

.hvac-calculator-page .calculator-card {
  padding: 20px;
  border: 1px solid var(--calc-line);
  border-radius: 16px;
  background: var(--calc-card);
  box-shadow: 0 1px 2px rgba(0, 0, 0, .04), 0 8px 24px rgba(0, 0, 0, .06);
}

.hvac-calculator-page .field {
  padding: 14px 0;
  border-bottom: 1px solid var(--calc-line);
}

.hvac-calculator-page .field:last-of-type {
  border-bottom: 0;
}

.hvac-calculator-page .row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.hvac-calculator-page .hint {
  margin-top: 2px;
  color: var(--calc-muted);
  font-size: 13px;
}

.hvac-calculator-page .val {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 2px;
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

.hvac-calculator-page .val input[type="number"] {
  width: 96px;
  min-height: 44px;
  padding: 6px 8px;
  border: 1px solid var(--calc-line);
  border-radius: 10px;
  background: var(--calc-card);
  color: var(--calc-ink);
  font: inherit;
  text-align: right;
}

.hvac-calculator-page .val input[type="number"]:focus {
  outline: 2px solid var(--calc-accent);
  outline-offset: 1px;
}

.hvac-calculator-page input[type="range"] {
  width: 100%;
  height: 44px;
  min-height: 44px;
  margin: 6px 0 0;
  padding: 0;
  accent-color: var(--calc-accent);
  touch-action: pan-y;
}

.hvac-calculator-page .group-title {
  margin: 6px 0 0;
  color: var(--calc-muted);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.hvac-calculator-page .group-title--install {
  margin-top: 14px;
}

.hvac-calculator-page details.assume {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--calc-line);
}

.hvac-calculator-page details.assume summary {
  display: flex;
  min-height: 44px;
  align-items: center;
  cursor: pointer;
  color: var(--calc-muted);
  font-weight: 600;
}

.hvac-calculator-page .result {
  margin-top: 16px;
  padding: 22px 20px;
  border-radius: 16px;
  background: var(--calc-ink);
  color: #fff;
  box-shadow: 0 1px 2px rgba(0, 0, 0, .04), 0 8px 24px rgba(0, 0, 0, .06);
}

.hvac-calculator-page .result .label {
  font-size: 14px;
  opacity: .8;
}

.hvac-calculator-page .big {
  margin: 4px 0 2px;
  font-size: clamp(40px, 11vw, 56px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
}

.hvac-calculator-page .sub {
  opacity: .85;
}

.hvac-calculator-page .split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 18px 0;
}

.hvac-calculator-page .split div {
  padding: 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, .08);
}

.hvac-calculator-page .split b {
  display: block;
  font-size: 20px;
  font-variant-numeric: tabular-nums;
}

.hvac-calculator-page .split span {
  font-size: 13px;
  opacity: .8;
}

.hvac-calculator-page .btn {
  display: flex;
  width: 100%;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  padding: 14px 18px;
  border: 0;
  border-radius: 12px;
  background: var(--calc-accent);
  color: var(--calc-accent-ink);
  font-size: 17px;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
}

.hvac-calculator-page .btn:active {
  transform: translateY(1px);
}

.hvac-calculator-page .cta-note {
  margin: 10px 0 0;
  font-size: 13px;
  opacity: .75;
  text-align: center;
}

.hvac-calculator-page .result-cta {
  margin-top: 18px;
}

.hvac-calculator-page .stats {
  margin: 0;
  font-size: 14px;
  opacity: .85;
}

.hvac-calculator-page ol.how {
  padding-left: 20px;
}

.hvac-calculator-page ol.how li {
  margin: 6px 0;
}

.hvac-calculator-page .faq details {
  margin: 10px 0;
  padding: 0 16px;
  border: 1px solid var(--calc-line);
  border-radius: 12px;
  background: var(--calc-card);
}

.hvac-calculator-page .faq summary {
  display: flex;
  min-height: 48px;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 0;
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}

.hvac-calculator-page .faq summary::-webkit-details-marker {
  display: none;
}

.hvac-calculator-page .faq summary::after {
  color: var(--calc-muted);
  content: "+";
  font-weight: 700;
}

.hvac-calculator-page .faq details[open] summary::after {
  content: "–";
}

.hvac-calculator-page .faq p {
  margin: 0 0 14px;
  color: var(--calc-muted);
}

.hvac-calculator-page .endcta {
  margin: 36px 0;
  text-align: center;
}

.hvac-calculator-page .endcta .btn {
  max-width: 420px;
  margin: 0 auto;
}

.hvac-calculator-page .endcta-note {
  color: var(--calc-muted);
}

.hvac-calculator-page .site-footer a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
}

.hvac-calculator-page .footer-bottom div {
  flex-wrap: wrap;
  gap: 8px 18px;
}

.hvac-calculator-page .sticky {
  position: fixed;
  z-index: 30;
  right: 0;
  bottom: 0;
  left: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
  transform: translateY(110%);
  border-top: 1px solid var(--calc-line);
  background: var(--calc-card);
  box-shadow: 0 -6px 20px rgba(0, 0, 0, .06);
  transition: transform .2s ease;
}

.hvac-calculator-page .sticky.show {
  transform: none;
}

.hvac-calculator-page .sticky .amt {
  flex: 1;
  color: var(--calc-muted);
  font-size: 13px;
  line-height: 1.2;
}

.hvac-calculator-page .sticky .amt b {
  display: block;
  color: var(--calc-ink);
  font-size: 18px;
  font-variant-numeric: tabular-nums;
}

.hvac-calculator-page .sticky .btn {
  width: auto;
  min-height: 46px;
  flex: 0 0 auto;
  font-size: 15px;
  white-space: nowrap;
}

@media (max-width: 520px) {
  .hvac-calculator-page .calculator-card {
    padding: 16px;
  }

  .hvac-calculator-page .result {
    padding: 20px 16px;
  }
}

@media (min-width: 760px) {
  .hvac-calculator-page .sticky {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hvac-calculator-page .sticky {
    transition: none;
  }
}