.calculator-page .site-header { position: relative; background: var(--footer); }
.calculator-page [hidden] { display: none !important; }
.calculator-section { padding: 72px 0 88px; background: var(--surface); }
.calculator-intro { margin-bottom: 38px; }
.calculator-intro h1 { max-width: none; margin-bottom: 20px; font-size: clamp(2rem, 4vw, 3.8rem); }
.calculator-intro p:not(.eyebrow) { color: var(--muted); }
.calculator-fallback { padding: 24px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); }
.calculator-layout { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); align-items: start; gap: 24px; }
.calculator-form { min-width: 0; padding: 34px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--white); }
.calculator-step-heading { display: flex; gap: 14px; align-items: center; margin-bottom: 28px; }
.calculator-step-heading > span { display: grid; width: 42px; height: 42px; flex: 0 0 auto; place-items: center; border-radius: 50%; background: var(--green); color: var(--ink); font-size: .86rem; font-weight: 800; }
.calculator-step-heading h2 { margin: 0; font-size: clamp(1.25rem, 2vw, 1.6rem); }
.calculator-field { min-width: 0; }
.calculator-field label { display: block; margin-bottom: 9px; color: var(--ink); font-weight: 700; }
.calculator-field label span { color: var(--muted); font-size: .85rem; font-weight: 400; }
.calculator-field input,
.calculator-field select,
.calculator-field textarea { display: block; width: 100%; min-width: 0; min-height: 54px; padding: 13px 15px; border: 1px solid #b8c7bf; border-radius: var(--radius-sm); color: var(--ink); background: var(--white); font: inherit; font-size: 1rem; line-height: 1.5; }
.calculator-field select { overflow: hidden; text-overflow: ellipsis; }
.calculator-field textarea { resize: vertical; min-height: 128px; }
.calculator-field input:hover,
.calculator-field select:hover,
.calculator-field textarea:hover { border-color: var(--ink-soft); }
.calculator-field [aria-invalid="true"] { border-color: #ad342e; }
.calculator-field textarea::placeholder { color: var(--muted); opacity: 1; }
.calculator-service-name { margin: 10px 0 0; color: var(--muted); font-size: .9rem; overflow-wrap: anywhere; }
.calculator-dimensions { min-width: 0; margin: 28px 0 0; padding: 0; border: 0; }
.calculator-dimensions legend { padding: 0; color: var(--ink); font-weight: 700; }
.calculator-hint { margin: 9px 0 16px; color: var(--muted); font-size: .87rem; }
.calculator-dimension-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.calculator-error { margin: 7px 0 0; color: #962b25; font-size: .85rem; }
.calculator-comment-field { margin-top: 28px; }
.calculator-count { margin: 7px 0 0; color: var(--muted); font-size: .8rem; text-align: right; }
.calculator-help { margin-top: 26px; padding-top: 22px; border-top: 1px solid var(--line); color: var(--muted); font-size: .9rem; }
.calculator-result { min-width: 0; display: grid; gap: 20px; }
.calculator-preview { margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--white); }
.calculator-preview-heading { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px; padding: 22px 26px 0; color: var(--ink); font-weight: 700; }
.calculator-material { padding: 4px 10px; border-radius: 999px; background: var(--surface); color: var(--muted); font-size: .76rem; font-weight: 600; }
.calculator-diagram { display: block; width: 100%; height: auto; }
.calculator-diagram .calculator-frame { fill: #f1eee7; stroke: #7d8f85; stroke-width: 3; }
.calculator-diagram .calculator-pane { fill: #c4e8e0; stroke: #548678; stroke-width: 2; }
.calculator-diagram .calculator-pane.is-mirror { fill: #dae3e8; stroke: #788e9b; }
.calculator-diagram .calculator-detail { fill: none; stroke: #7d8f85; stroke-width: 3; stroke-linecap: round; }
.calculator-diagram .calculator-shine { fill: none; stroke: #fff; stroke-width: 5; stroke-linecap: round; opacity: .82; }
.calculator-diagram .calculator-measure-line { stroke: #536a5e; stroke-width: 1.2; }
.calculator-diagram .calculator-measure-text { fill: #304d3e; font-family: Inter, Arial, sans-serif; font-size: 14px; font-weight: 600; text-anchor: middle; }
.calculator-diagram .calculator-edge-line { stroke: var(--green-deep); stroke-width: 7; stroke-linecap: round; fill: none; }
.calculator-preview figcaption { padding: 0 26px 24px; color: var(--muted); font-size: .83rem; }
.calculator-estimate-card { padding: 28px; border: 1px solid #b7dfd2; border-radius: var(--radius); background: var(--mint); }
.calculator-estimate-card h2 { margin-bottom: 14px; font-size: 1rem; letter-spacing: -.02em; }
.calculator-estimate { margin: 0 0 12px; color: var(--ink); font-size: clamp(1.6rem, 2.65vw, 2.35rem); font-weight: 800; letter-spacing: -.04em; line-height: 1.2; overflow-wrap: anywhere; }
.calculator-quantity { margin-bottom: 10px; color: var(--ink-soft); font-size: .9rem; }
.calculator-explanation { margin-bottom: 0; color: var(--ink-soft); font-size: .92rem; }
.calculator-reference { margin: 18px 0 0; padding-top: 16px; border-top: 1px solid #afd9cb; color: var(--ink-soft); font-size: .82rem; }
.calculator-request { grid-column: 1 / -1; padding: 34px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: var(--white); }
.calculator-request > p { color: var(--muted); }
.calculator-request .calculator-step-heading { margin-bottom: 18px; }
.calculator-send-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.calculator-send-actions .button { gap: .45em; }
.calculator-send-actions [aria-disabled="true"] { opacity: .48; cursor: not-allowed; transform: none; }
.calculator-send-note { margin: 15px 0 0; font-size: .88rem; }
.calculator-request .calculator-legal { margin: 22px 0 0; font-size: .8rem; }
.calculator-contacts { margin-top: 30px; padding: 26px 0 0; border-top: 1px solid var(--line); color: var(--muted); font-size: .92rem; }
.calculator-contacts p { margin-bottom: 10px; }
.calculator-contacts p:last-child { margin-bottom: 0; }
.calculator-contacts strong { color: var(--ink); }

@media (max-width: 900px) {
  .calculator-layout { grid-template-columns: minmax(0, 1fr); }
  .calculator-result { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: start; }
}

@media (max-width: 580px) {
  .calculator-section { padding: 44px 0 58px; }
  .calculator-intro { margin-bottom: 26px; }
  .calculator-form, .calculator-request { padding: 22px 18px; border-radius: var(--radius); }
  .calculator-layout, .calculator-result { grid-template-columns: minmax(0, 1fr); gap: 18px; }
  .calculator-step-heading { gap: 10px; margin-bottom: 22px; }
  .calculator-step-heading > span { width: 36px; height: 36px; }
  .calculator-dimension-grid { gap: 12px; }
  .calculator-field input { padding-inline: 12px; }
  .calculator-preview { border-radius: var(--radius); }
  .calculator-preview-heading { padding: 20px 18px 0; }
  .calculator-preview figcaption { padding-inline: 18px; }
  .calculator-estimate-card { padding: 24px 20px; }
  .calculator-send-actions { flex-direction: column; }
  .calculator-send-actions .button { width: 100%; }
}

/* Six navigation links switch to the existing menu layout before they collide. */
@media (min-width: 821px) and (max-width: 1040px) {
  .site-nav:has(a[href="/calculator.html"]) { position: absolute; top: 72px; right: 14px; left: 14px; display: none; padding: 12px; align-items: stretch; flex-direction: column; gap: 0; border-radius: 18px; background: var(--white); box-shadow: var(--shadow); }
  .site-nav:has(a[href="/calculator.html"]).is-open { display: flex; }
  .site-nav:has(a[href="/calculator.html"]) a { padding: 13px 15px; color: var(--ink); }
  .site-nav:has(a[href="/calculator.html"]) a::after { display: none; }
  .site-nav:has(a[href="/calculator.html"]) .nav-cta { margin-top: 6px; color: var(--ink) !important; background: var(--green); }
  .header-inner:has(.site-nav a[href="/calculator.html"]) .menu-toggle { display: block; }
}