*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --t2e-brand-primary: #1d4ed8;
  --t2e-brand-dark: #162338;
  --t2e-brand-success: #166534;

  --t2e-blue: var(--t2e-brand-primary);
  --t2e-blue-2: var(--t2e-brand-dark);
  --t2e-blue-soft: #eef4fb;
  --t2e-blue-pale: #f7faff;
  --t2e-green: var(--t2e-brand-success);
  --t2e-green-soft: #edf9f0;
  --t2e-amber: #9a3412;

  --bg: #f8fafc;
  --card: #ffffff;
  --card-2: #fbfcfe;
  --ink: #0f172a;
  --ink-soft: #334155;
  --muted: #64748b;
  --line: rgba(148, 163, 184, 0.32);
  --line-strong: #cbd5e1;

  --h1: clamp(25px, 3.4vw, 34px);
  --h2: clamp(18px, 2.5vw, 22px);
  --h3: clamp(16px, 2vw, 19px);
  --body: clamp(14px, 1.7vw, 16px);
  --small: clamp(12px, 1.45vw, 14px);

  --radius-xl: 18px;
  --radius-lg: 15px;
  --radius: 13px;
  --radius-sm: 10px;

  --shadow-soft: 0 8px 20px rgba(15, 23, 42, 0.055);
  --shadow-subtle: 0 3px 10px rgba(15, 23, 42, 0.04);

  --equation-reserve: 76px;
  --result-reserve: 72px;
  --visual-reserve: 185px;
  --highlight-ring: 0 0 0 2px #dbeafe, 0 0 0 4px #1d4ed8;
  --mobile-safe-bottom: calc(env(safe-area-inset-bottom, 0px) + 72px);

  --control-height-desktop: 38px;
  --control-height-mobile: 42px;

  --calc-shell-max-width: 1040px;
  --calc-shell-max-width-desktop: 1080px;
  --calc-shell-max-width-wide: 1120px;
}

html,
body {
  margin: 0 !important;
  padding: 0 !important;
  max-width: 100%;
  overflow-x: hidden;
  scroll-behavior: smooth;
}

body.calculator-page {
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif !important;
  background: linear-gradient(180deg, #f7f9fc 0%, #fbfcfe 100%) !important;
  color: var(--ink) !important;
  line-height: 1.45 !important;
  overflow-wrap: anywhere !important;
  word-break: break-word !important;
  -webkit-font-smoothing: antialiased;
}

.ast-container,
.ast-container-fluid {
  margin-left: auto !important;
  margin-right: auto !important;
  padding-left: 0 !important;
  padding-right: 0 !important;
}

body.calculator-page .ast-container,
body.calculator-page .ast-container-fluid,
body.calculator-page .site-content > .ast-container,
body.calculator-page .entry-content > .ast-container,
body.calculator-page .entry-content > .ast-container-fluid {
  padding-left: 0 !important;
  padding-right: 0 !important;
}

body.calculator-page .site,
body.calculator-page .site-content,
body.calculator-page .content-area,
body.calculator-page .entry-content,
body.calculator-page .ast-container,
body.calculator-page .ast-container-fluid,
body.calculator-page .ast-article-single,
body.calculator-page .inside-article,
body.calculator-page article,
body.calculator-page .ast-separate-container .ast-article-post,
body.calculator-page .ast-separate-container .ast-article-single,
body.calculator-page .ast-page-builder-template,
body.calculator-page .entry-content > .wp-block-group {
  margin-left: 0 !important;
  margin-right: 0 !important;
  padding-left: 0 !important;
  padding-right: 0 !important;
  max-width: none !important;
}

/* =========================================================
   Calculator Breadcrumbs — Astra-Safe Alignment
   Purpose:
   - Breadcrumb wrapper stays outside <main>.
   - Breadcrumb nav aligns to the calculator shell width.
   - Breadcrumb content aligns right on desktop.
   - Mobile remains left-aligned for readability.
========================================================= */

.calc-breadcrumbs-wrap {
  display: block !important;
  clear: both !important;
  float: none !important;
  position: relative !important;
  left: auto !important;
  right: auto !important;
  width: 100% !important;
  max-width: none !important;
  margin: 8px auto 6px !important;
  padding: 0 10px !important;
  box-sizing: border-box !important;
  overflow: hidden !important;
  text-align: right !important;
}

.calc-breadcrumbs {
  display: block !important;
  float: none !important;
  width: 100% !important;
  max-width: var(--calc-shell-max-width) !important;
  margin: 0 auto !important;
  padding: 0 !important;
  color: #64748b !important;
  font-size: 12px !important;
  line-height: 1.4 !important;
  box-sizing: border-box !important;
  overflow: hidden !important;
  text-align: right !important;
}

.calc-breadcrumbs ol {
  display: flex !important;
  align-items: center !important;
  justify-content: flex-start !important;
  flex-wrap: wrap !important;
  gap: 6px !important;
  width: 100% !important;
  max-width: 100% !important;
  list-style: none !important;
  margin: 0 !important;
  padding: 0 !important;
  box-sizing: border-box !important;
  overflow-wrap: anywhere !important;
  word-break: normal !important;
  text-align: right !important;
}

.calc-breadcrumbs li {
  display: inline-flex !important;
  align-items: center !important;
  min-width: 0 !important;
  max-width: 100% !important;
  margin: 0 !important;
  padding: 0 !important;
  color: #64748b !important;
  font-size: 12px !important;
  line-height: 1.4 !important;
  white-space: normal !important;
}

.calc-breadcrumbs li + li::before {
  content: "/" !important;
  margin-right: 6px !important;
  color: #94a3b8 !important;
  font-weight: 700 !important;
  flex: 0 0 auto !important;
}

.calc-breadcrumbs a,
.calc-breadcrumbs span {
  display: inline-block !important;
  max-width: 100% !important;
  overflow-wrap: anywhere !important;
  word-break: normal !important;
}

.calc-breadcrumbs a {
  color: #475569 !important;
  font-weight: 650 !important;
  text-decoration: none !important;
}

.calc-breadcrumbs a:hover,
.calc-breadcrumbs a:focus {
  color: var(--t2e-blue) !important;
  text-decoration: underline !important;
  text-underline-offset: 2px !important;
}

.calc-breadcrumbs span {
  color: #64748b !important;
  font-weight: 600 !important;
}

.calc-breadcrumbs li[aria-current="page"] span {
  color: #334155 !important;
  font-weight: 750 !important;
}

body.calculator-page .site-content .calc-breadcrumbs-wrap,
body.calculator-page .content-area .calc-breadcrumbs-wrap,
body.calculator-page .entry-content .calc-breadcrumbs-wrap,
body.calculator-page .ast-container .calc-breadcrumbs-wrap,
body.calculator-page .ast-container-fluid .calc-breadcrumbs-wrap,
body.calculator-page .ast-article-single .calc-breadcrumbs-wrap,
body.calculator-page .inside-article .calc-breadcrumbs-wrap,
body.calculator-page article .calc-breadcrumbs-wrap {
  display: block !important;
  clear: both !important;
  float: none !important;
  width: 100% !important;
  max-width: none !important;
  margin-left: auto !important;
  margin-right: auto !important;
  padding-left: 10px !important;
  padding-right: 10px !important;
  box-sizing: border-box !important;
  overflow: hidden !important;
  text-align: right !important;
}

body.calculator-page .site-content .calc-breadcrumbs,
body.calculator-page .content-area .calc-breadcrumbs,
body.calculator-page .entry-content .calc-breadcrumbs,
body.calculator-page .ast-container .calc-breadcrumbs,
body.calculator-page .ast-container-fluid .calc-breadcrumbs,
body.calculator-page .ast-article-single .calc-breadcrumbs,
body.calculator-page .inside-article .calc-breadcrumbs,
body.calculator-page article .calc-breadcrumbs {
  display: block !important;
  width: 100% !important;
  max-width: var(--calc-shell-max-width) !important;
  margin-left: auto !important;
  margin-right: auto !important;
  padding: 0 !important;
  box-sizing: border-box !important;
  text-align: right !important;
}

body.calculator-page .site-content .calc-breadcrumbs ol,
body.calculator-page .content-area .calc-breadcrumbs ol,
body.calculator-page .entry-content .calc-breadcrumbs ol,
body.calculator-page .ast-container .calc-breadcrumbs ol,
body.calculator-page .ast-container-fluid .calc-breadcrumbs ol,
body.calculator-page .ast-article-single .calc-breadcrumbs ol,
body.calculator-page .inside-article .calc-breadcrumbs ol,
body.calculator-page article .calc-breadcrumbs ol {
  justify-content: flex-end !important;
}

/* =========================================================
   Breadcrumb Fallback Safety
   Keeps breadcrumbs constrained even if a generated page outputs
   a raw .calc-breadcrumbs node outside the approved wrapper.
========================================================= */

body.calculator-page .entry-content > .calc-breadcrumbs,
body.calculator-page .ast-container > .calc-breadcrumbs,
body.calculator-page .ast-container-fluid > .calc-breadcrumbs,
body.calculator-page .site-content > .calc-breadcrumbs,
body.calculator-page .content-area > .calc-breadcrumbs,
body.calculator-page article > .calc-breadcrumbs {
  display: block !important;
  float: none !important;
  clear: both !important;
  width: calc(100% - 20px) !important;
  max-width: var(--calc-shell-max-width) !important;
  margin: 8px auto 6px !important;
  padding: 0 !important;
  box-sizing: border-box !important;
  overflow: hidden !important;
  text-align: right !important;
}

body.calculator-page .entry-content > .calc-breadcrumbs ol,
body.calculator-page .ast-container > .calc-breadcrumbs ol,
body.calculator-page .ast-container-fluid > .calc-breadcrumbs ol,
body.calculator-page .site-content > .calc-breadcrumbs ol,
body.calculator-page .content-area > .calc-breadcrumbs ol,
body.calculator-page article > .calc-breadcrumbs ol {
  justify-content: flex-end !important;
}

/* =========================================================
   Main Calculator Layout
========================================================= */

.calculator-section {
  width: 100%;
  max-width: none !important;
  margin: 8px auto 10px;
  padding: 0 10px 8px;
}

.calc-layout {
  width: 100%;
  max-width: var(--calc-shell-max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

.calc-layout > * + * {
  margin-top: -1px;
}

.calc-layout > *:first-child {
  border-top-left-radius: var(--radius-lg);
  border-top-right-radius: var(--radius-lg);
}

.calc-layout > *:last-child {
  border-bottom-left-radius: var(--radius-lg);
  border-bottom-right-radius: var(--radius-lg);
}

.calc-layout > .print-summary:last-child {
  margin-top: 0;
}

.card,
.eq-card,
.panel-card,
.form-card,
.setup-card,
.optional-card,
.equation-top-card,
.steps-card,
.source-card,
.visual-card,
.assumption-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 0;
  box-shadow: var(--shadow-subtle);
}

.panel-card,
.form-card,
.setup-card,
.optional-card,
.equation-top-card,
.result-card,
.source-card,
.visual-card,
.assumption-card {
  padding: 11px 13px;
}

.title-container.simple {
  padding: 13px 16px 12px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.045) !important;
  border-color: #dbe3ec !important;
}

#calcTitle {
  margin: 0 0 4px 0;
  color: var(--t2e-blue-2) !important;
  font-size: var(--h1);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: -0.03em !important;
}

.calc-subtitle {
  margin: 0;
  color: #475569 !important;
  font-size: 13.5px;
  line-height: 1.45;
  max-width: 82ch !important;
}

.calc-disclaimer {
  margin: 6px 0 0 0;
  font-size: 11.5px;
  line-height: 1.45;
  color: #64748b !important;
}

.calc-disclaimer a {
  color: inherit !important;
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: rgba(100, 116, 139, 0.45);
  text-underline-offset: 2px;
  transition: color 0.15s ease, text-decoration-color 0.15s ease;
}

.calc-disclaimer a:hover,
.calc-disclaimer a:focus {
  color: #475569 !important;
  text-decoration-color: rgba(71, 85, 105, 0.7);
}

/* =========================================================
   Equation Card
   Correction:
   - .eq-card wrapper is structural only.
   - .t2e-equation-block is the only visible equation box.
   - This prevents the equation box inside a box failure.
========================================================= */

.equation-top-card {
  padding-top: 13px !important;
  background: linear-gradient(180deg, #ffffff 0%, #fbfcfe 100%) !important;
}

.eq-hero-card {
  min-width: 0;
}

.section-label,
.eq-name-tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 3px 10px;
  border-radius: 999px;
  background: linear-gradient(180deg, #e7f0fb 0%, #dce8f7 100%) !important;
  border: 1px solid #b7cde7 !important;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.9) inset !important;
  color: var(--t2e-blue-2) !important;
  font-size: 10.5px;
  font-weight: 800;
  letter-spacing: 0.01em;
  text-transform: none;
  white-space: nowrap;
}

.eq-name-tag {
  margin-bottom: 8px;
}

.eq-card--embedded,
.eq-card--tight,
.eq-card.eq-card--embedded.eq-card--tight {
  background: transparent !important;
  border: none !important;
  border-radius: 0 !important;
  padding: 0 !important;
  margin: 0 !important;
  box-shadow: none !important;
}

.eq-math-shell {
  min-block-size: var(--equation-reserve);
  display: grid;
  align-items: center;
  width: 100%;
  max-width: 100%;
  min-width: 0;
}

.eq-math {
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  padding: 0;
  text-align: center;
  width: 100%;
  max-width: 100%;
  min-width: 0;
}

.t2e-equation-block {
  background: linear-gradient(180deg, #f1f4f7 0%, #e9eef3 100%);
  border: 1px solid #d6dee7;
  border-radius: 11px;
  padding: 36px 16px 18px;
  margin: 0;
  position: relative;
  min-height: 92px;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.7);
}

.t2e-equation-block::before {
  content: "Equation";
  position: absolute;
  top: 9px;
  left: 12px;
  font-size: 9.5px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #64748b;
}

.calculator-section mjx-container {
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  color: inherit !important;
}

.calculator-section mjx-container[jax="SVG"] {
  direction: ltr;
}

.calculator-section mjx-container svg {
  max-width: none;
}

.eq-math,
.step-equation-box__math,
.t2e-equation-block {
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
}

.eq-math mjx-container,
.step-equation-box__math mjx-container,
.t2e-equation-block mjx-container {
  display: block;
  margin: 0 auto !important;
  text-align: center;
  min-width: max-content;
}

.t2e-equation-block mjx-container {
  font-size: clamp(1.18rem, 2.1vw, 1.55rem) !important;
}

.step-equation-box__math mjx-container {
  font-size: clamp(1.02rem, 1.6vw, 1.25rem) !important;
}

.eq-math mjx-container svg,
.step-equation-box__math mjx-container svg,
.t2e-equation-block mjx-container svg {
  display: inline-block;
}

.calculator-section p mjx-container,
.calculator-section li mjx-container,
.calculator-section td mjx-container,
.calculator-section label mjx-container,
.calculator-section .help-text mjx-container,
.calculator-section .stat-label mjx-container,
.calculator-section .stat-value mjx-container,
.calculator-section .result-meta-line mjx-container,
.calculator-section .result-interpretation mjx-container,
.calculator-section .warning-card mjx-container,
.calculator-section .source-list mjx-container,
.calculator-section .assumption-list mjx-container,
.calculator-section .step-note mjx-container {
  display: inline-block;
  vertical-align: middle;
  max-width: 100%;
}

/* =========================================================
   Section Headings
========================================================= */

.step-heading {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin-bottom: 9px !important;
}

.step-number {
  width: 25px;
  height: 25px;
  min-width: 25px;
  display: inline-grid;
  place-items: center;
  border-radius: 999px;
  background: #e8eef5 !important;
  color: #162338 !important;
  font-size: 12px;
  font-weight: 800;
  line-height: 1;
  box-shadow: none !important;
  border: 1px solid #d7e2ee !important;
}

.step-heading-text {
  min-width: 0;
}

.group-title {
  margin: 0 0 1px 0;
  color: var(--t2e-blue-2) !important;
  font-size: 17px;
  line-height: 1.2;
  font-weight: 800;
}

.group-subtitle {
  margin: 0;
  color: var(--muted) !important;
  font-size: 11.5px;
  line-height: 1.45;
}

/* =========================================================
   Setup + Inputs
========================================================= */

.setup-grid,
.advanced-inline-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.setup-grid--compact {
  align-items: start;
}

.setup-card .step-heading,
.form-card .step-heading,
.result-card .step-heading,
.source-card .step-heading,
.visual-card .step-heading {
  margin-bottom: 9px !important;
}

.setup-card {
  background: linear-gradient(180deg, #ffffff 0%, #fbfcfe 100%) !important;
}

.instruction-banner {
  margin-top: 9px !important;
  padding: 9px 11px !important;
  border-radius: 10px !important;
  border: 1px solid #d9e2ec !important;
  background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%) !important;
  color: #1e293b !important;
  font-size: 12px !important;
  line-height: 1.45;
  font-weight: 700 !important;
  box-shadow: 0 3px 8px rgba(15, 23, 42, 0.035) !important;
}

.instruction-banner strong {
  color: #0f172a !important;
  font-weight: 800 !important;
}

.active-inputs-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-top: 6px;
}

.active-inputs-grid--single {
  grid-template-columns: 1fr !important;
}

.setup-grid .setup-block,
.advanced-inline-grid .input-shell {
  padding: 0 !important;
}

.input-row {
  display: none;
  padding: 0;
  margin: 0;
  border: none;
  background: transparent;
  box-shadow: none;
  border-radius: 0;
}

.input-row.is-visible {
  display: flex;
  flex-direction: column;
  padding: 8px 9px 7px !important;
  border: 1px solid #e2e8f0 !important;
  border-radius: 11px !important;
  background: linear-gradient(180deg, #ffffff 0%, #fbfcfe 100%) !important;
  box-shadow: 0 2px 7px rgba(15, 23, 42, 0.028) !important;
}

.input-row[hidden],
.input-row[aria-hidden="true"] {
  display: none !important;
}

.input-row.is-visible:hover,
.input-row.is-visible:focus-within {
  border-color: #cbd5e1 !important;
  box-shadow: 0 6px 14px rgba(15, 23, 42, 0.045) !important;
}

.input-row--full {
  grid-column: 1 / -1;
}

.input-shell.is-linked,
.input-row.is-linked {
  padding: 6px;
  margin: -6px;
  border-radius: 10px;
  background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%) !important;
  box-shadow: 0 0 0 2px rgba(148, 163, 184, 0.14) !important;
}

.input-label {
  font-size: 11.5px;
  color: var(--ink-soft) !important;
  font-weight: 750;
  background: transparent !important;
  mix-blend-mode: normal !important;
  opacity: 1 !important;
  -webkit-text-fill-color: var(--ink-soft) !important;
  margin-bottom: 4px;
}

.input-shell:hover .input-label,
.input-row:hover .input-label,
.input-shell:focus-within .input-label,
.input-row:focus-within .input-label,
.input-shell label:hover,
.input-row label:hover,
.calculator-page label:hover,
.calculator-page label:focus,
.calculator-page .group-subtitle:hover,
.calculator-page .calc-subtitle:hover,
.calculator-page .stat-label:hover,
.calculator-page .result-meta-line:hover {
  color: var(--ink-soft) !important;
  background: transparent !important;
  opacity: 1 !important;
  -webkit-text-fill-color: var(--ink-soft) !important;
  text-shadow: none !important;
  mix-blend-mode: normal !important;
}

.input-group {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(92px, 132px) var(--control-height-desktop);
  gap: 6px;
  align-items: stretch;
  width: 100%;
  min-width: 0;
}

.input-group--single {
  display: grid !important;
  grid-template-columns: minmax(0, 1fr) !important;
  width: 100% !important;
  max-width: 100% !important;
  min-width: 0 !important;
}

.calculator-section input[type="number"],
.calculator-section input[type="text"],
.calculator-section select {
  display: block !important;
  width: 100% !important;
  min-width: 0 !important;
  height: var(--control-height-desktop) !important;
  min-height: var(--control-height-desktop) !important;
  max-height: var(--control-height-desktop) !important;
  border-radius: 9px !important;
  border: 1px solid #cfdceb !important;
  background-color: #fff !important;
  color: var(--ink) !important;
  padding: 0 10px !important;
  font-size: 14px !important;
  line-height: normal !important;
  box-shadow: inset 0 1px 2px rgba(15, 23, 42, 0.03) !important;
  margin: 0 !important;
  box-sizing: border-box !important;
  vertical-align: top !important;
}

.calculator-section select {
  appearance: none !important;
  -webkit-appearance: none !important;
  background-image:
    linear-gradient(45deg, transparent 50%, #64748b 50%),
    linear-gradient(135deg, #64748b 50%, transparent 50%);
  background-position:
    calc(100% - 15px) 50%,
    calc(100% - 10px) 50%;
  background-size:
    5px 5px,
    5px 5px;
  background-repeat: no-repeat;
  padding-right: 28px !important;
  text-overflow: ellipsis;
  line-height: normal !important;
}

.calculator-section .input-group:not(.input-group--single) select {
  width: 100% !important;
  min-width: 92px !important;
  max-width: 132px !important;
  height: var(--control-height-desktop) !important;
  min-height: var(--control-height-desktop) !important;
  max-height: var(--control-height-desktop) !important;
  padding-left: 8px !important;
  padding-right: 26px !important;
  line-height: normal !important;
  white-space: nowrap !important;
}

.calculator-section .input-group--single,
.setup-card .input-group--single,
.advanced-inline-card .input-group--single {
  display: grid !important;
  grid-template-columns: minmax(0, 1fr) !important;
  width: 100% !important;
  max-width: 100% !important;
  min-width: 0 !important;
}

.calculator-section .input-group--single select,
.setup-card .input-group--single select,
.advanced-inline-card .input-group--single select {
  display: block !important;
  width: 100% !important;
  max-width: 100% !important;
  min-width: 0 !important;
}

.calculator-section input:hover,
.calculator-section select:hover {
  border-color: #b7cde7 !important;
  background: #fff !important;
  color: var(--ink) !important;
}

.calculator-section input:focus,
.calculator-section select:focus {
  background: #fff !important;
  color: var(--ink) !important;
  border-color: #94a3b8 !important;
  box-shadow: 0 0 0 3px rgba(148, 163, 184, 0.16) !important;
  outline: none !important;
}

input::placeholder {
  color: #94a3b8;
}

input.is-invalid,
select.is-invalid {
  border-color: var(--t2e-amber) !important;
  background: #fff8f1 !important;
  box-shadow: 0 0 0 1px rgba(154, 52, 18, 0.22) !important;
}

.field-error {
  display: none;
  font-size: 11px;
  color: #7c2d12 !important;
  font-weight: 600;
  margin-top: 4px;
}

.field-error.is-visible {
  display: block;
}

.help-text {
  display: none;
  margin-top: 5px;
  padding: 0 2px;
  color: var(--muted) !important;
  font-size: 11.5px;
  line-height: 1.42;
}

.help-text.is-open {
  display: block;
}

.advanced-inline-card {
  margin-top: 8px;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  background: #fbfcfe;
  overflow: hidden;
}

.advanced-inline-card summary {
  cursor: pointer;
  list-style: none;
  padding: 10px 12px;
  font-size: 12.5px;
  font-weight: 800;
  color: var(--t2e-blue-2) !important;
  background: #f8fafc;
}

.advanced-inline-card summary::-webkit-details-marker {
  display: none;
}

.advanced-inline-card summary::after {
  content: "▾";
  float: right;
  color: var(--muted);
}

.advanced-inline-card[open] summary::after {
  content: "▴";
}

.advanced-inline-grid {
  padding: 9px 10px 10px;
}

/* =========================================================
   Visual Card
   Correction:
   - Default visual shell remains compact.
   - .visual-shell--diagram gives technical diagrams enough height.
   - SVG labels get safer default readability.
========================================================= */

.visual-card {
  padding: 11px 13px;
}

.visual-shell {
  width: 100%;
  min-height: var(--visual-reserve);
  aspect-ratio: 20 / 9;
  border: 1px solid #dbe3ec;
  border-radius: 11px;
  background:
    linear-gradient(180deg, rgba(248, 250, 252, 0.96) 0%, rgba(255, 255, 255, 0.98) 100%),
    radial-gradient(circle at top left, rgba(29, 78, 216, 0.06), transparent 34%);
  overflow: hidden;
  display: grid;
  place-items: center;
  max-width: 100%;
  min-width: 0;
  box-sizing: border-box;
}

.visual-shell--diagram {
  min-height: clamp(240px, 34vw, 360px);
  aspect-ratio: 16 / 9;
}

.visual-svg {
  width: 100%;
  height: 100%;
  max-height: 360px;
  display: block;
  max-width: 100%;
  min-width: 0;
}

.visual-shell--diagram .visual-svg {
  max-height: 420px;
}

.visual-image {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  min-width: 0;
  object-fit: contain;
  object-position: center;
  border: 0;
}

.visual-image--cover {
  object-fit: cover;
}

.visual-svg text {
  font-size: clamp(18px, 2.2vw, 28px);
  font-weight: 750;
}

.visual-svg .visual-label,
.visual-svg .diagram-label {
  font-size: clamp(22px, 2.8vw, 34px);
  font-weight: 800;
}

.visual-svg .visual-sub-label,
.visual-svg .diagram-sub-label {
  font-size: clamp(17px, 2vw, 24px);
  font-weight: 700;
}

.visual-svg .visual-result,
.visual-svg .diagram-result {
  font-size: clamp(22px, 2.8vw, 34px);
  font-weight: 850;
}

/* =========================================================
   Result Card
========================================================= */

.result-card {
  padding: 11px 13px;
  background: linear-gradient(180deg, #ffffff 0%, #fbfcfe 100%) !important;
}

.result-row {
  min-block-size: var(--result-reserve);
  display: grid;
  align-items: center;
  gap: 4px;
  padding: 12px 13px !important;
  border-radius: 11px !important;
  border: 1px solid #dbe4ee !important;
  background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%) !important;
  box-shadow: 0 6px 14px rgba(15, 23, 42, 0.035) !important;
}

.result-row.is-ready {
  border-color: #bfdcc8 !important;
  background: linear-gradient(135deg, #f3fbf6 0%, #ffffff 100%) !important;
}

.result-row.is-error {
  border-color: #f3c2b4;
  background: linear-gradient(135deg, #fff8f1 0%, #ffffff 100%);
}

#calculatedLabel {
  color: #64748b !important;
  font-size: 11.5px !important;
  font-weight: 800 !important;
  letter-spacing: 0.04em !important;
  text-transform: uppercase !important;
}

.result-value-wrap {
  display: flex;
  align-items: baseline;
  gap: 7px;
  flex-wrap: wrap;
}

#calculatedValue {
  font-size: clamp(25px, 3.5vw, 34px) !important;
  line-height: 1.05;
  font-weight: 800 !important;
  color: var(--ink) !important;
  letter-spacing: -0.03em !important;
}

.result-unit-badge,
.unit-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 28px;
  padding: 4px 8px;
  background: #eef2f7 !important;
  color: #162338 !important;
  font-size: 10.5px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid #d7e2ee !important;
}

.result-unit-badge--square,
.unit-chip--square,
.mobile-sticky-result__unit--square {
  border-radius: 9px !important;
}

.unit-chip {
  height: var(--control-height-desktop);
  min-height: var(--control-height-desktop);
  max-height: var(--control-height-desktop);
  min-width: 44px;
  background: #f8fafc;
  box-sizing: border-box;
}

.result-meta-line,
.result-interpretation {
  color: #64748b !important;
  font-size: 11.25px !important;
  line-height: 1.38;
}

.result-interpretation {
  font-weight: 650;
}

.quick-stats {
  margin-top: 9px !important;
  padding: 10px 12px !important;
  border-radius: 11px !important;
  border: 1px solid #dbe3ec !important;
  background: linear-gradient(180deg, #fbfcfe 0%, #f8fafc 100%) !important;
  box-shadow: 0 3px 8px rgba(15, 23, 42, 0.03) !important;
}

.quick-stats-title {
  margin: 0 0 7px 0 !important;
  color: #162338 !important;
  font-size: 10.5px !important;
  font-weight: 800;
  letter-spacing: 0.11em !important;
  text-transform: uppercase;
}

.quick-stats-list,
.steps-list,
.assumption-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.quick-stats-list li {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 9px;
  padding: 6px 0 !important;
  border-bottom: 1px solid #eef2f7;
  font-size: 11.75px;
}

.quick-stats-list li:last-child {
  border-bottom: none;
}

.stat-label {
  color: #475569 !important;
  font-weight: 600 !important;
}

.stat-value {
  color: #0f172a !important;
  font-weight: 800 !important;
  text-align: right;
}

/* =========================================================
   Solution Steps
========================================================= */

.steps-card {
  margin-top: 9px;
  border: 1px solid #dbe3ec !important;
  border-radius: 10px;
  background: linear-gradient(180deg, #fbfcfe 0%, #f8fafc 100%) !important;
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.035) !important;
  overflow: hidden;
}

.steps-card summary {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  list-style: none;
  cursor: pointer;
  padding: 11px 12px;
  background: linear-gradient(180deg, #f8fafc 0%, #eef2f7 100%) !important;
  border-bottom: 1px solid #dbe3ec !important;
  user-select: none;
}

.steps-card summary::-webkit-details-marker {
  display: none;
}

.steps-card summary::before {
  content: "";
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  border-radius: 9px;
  background: linear-gradient(180deg, #ffffff 0%, #eef2f7 100%) !important;
  border: 1px solid #d7e2ee !important;
  box-shadow: 0 3px 7px rgba(15, 23, 42, 0.035) !important;
}

.steps-card summary::after {
  content: "";
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--t2e-blue-2);
  border-bottom: 2px solid var(--t2e-blue-2);
  transform: rotate(45deg);
  transition: transform 0.2s ease;
  margin-left: auto;
  margin-right: 4px;
  opacity: 0.9;
}

.steps-card[open] summary::after {
  transform: rotate(-135deg);
  margin-top: 4px;
}

.steps-summary-inner {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 0;
}

.steps-summary-title {
  color: #162338 !important;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.01em;
  line-height: 1.2;
}

.steps-summary-subtitle {
  color: #64748b !important;
  font-size: 10.75px;
  font-weight: 500;
  line-height: 1.32;
}

.steps-card summary:hover {
  background: linear-gradient(180deg, #f4f7fb 0%, #ebf0f5 100%);
}

.steps-card summary:focus-visible {
  outline: none;
  box-shadow: var(--highlight-ring);
}

.steps-card-body {
  padding: 10px;
  background: linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(248,250,252,0.98) 100%);
}

.steps-list {
  counter-reset: step-counter;
  display: grid;
  gap: 8px;
}

.steps-list li {
  position: relative;
  margin: 0;
  padding: 10px 10px 10px 48px;
  border: 1px solid #e3ebf3 !important;
  border-radius: 10px;
  background: linear-gradient(180deg, #ffffff 0%, #fbfcfe 100%) !important;
  color: var(--ink-soft) !important;
  font-size: 11.75px;
  line-height: 1.52;
  box-shadow: 0 3px 8px rgba(15, 23, 42, 0.028);
  counter-increment: step-counter;
}

.steps-list li::before {
  content: counter(step-counter);
  position: absolute;
  top: 10px;
  left: 10px;
  width: 26px;
  height: 26px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: #e8eef5 !important;
  color: #162338 !important;
  font-size: 10.5px;
  font-weight: 800;
  letter-spacing: 0.02em;
  border: 1px solid #d7e2ee !important;
}

.steps-list li strong {
  color: var(--ink) !important;
  font-weight: 800;
}

.steps-list .steps-empty {
  padding: 12px 12px 12px 46px;
  color: var(--muted) !important;
  background: linear-gradient(180deg, #fcfdff 0%, #f8fafc 100%);
}

.steps-list .steps-empty::before {
  content: "i";
  font-family: Georgia, serif;
  font-size: 13px;
  font-weight: 700;
  background: #e8eef5;
  color: var(--t2e-blue-2);
}

.step-equation-box {
  position: relative;
  margin-top: 7px;
  border: 1px solid #d8e0e8 !important;
  border-radius: 11px !important;
  background: linear-gradient(180deg, #f2f5f8 0%, #e9eef3 100%) !important;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8) !important;
  padding: 16px 11px 11px !important;
}

.step-equation-box__label {
  position: absolute;
  top: -10px;
  left: 11px;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  min-height: 20px;
  padding: 2px 9px;
  border-radius: 999px;
  background: linear-gradient(180deg, #e7f0fb 0%, #dce8f7 100%) !important;
  border: 1px solid #b7cde7 !important;
  color: var(--t2e-blue-2) !important;
  font-size: 9.5px;
  font-weight: 800;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.step-equation-box__math {
  min-height: 44px;
  display: grid;
  align-items: center;
  justify-items: center;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
}

.step-note {
  padding: 9px 10px;
  border-radius: 10px;
  border: 1px solid #e4ebf3 !important;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%) !important;
  color: #475569 !important;
  font-size: 11.25px;
  line-height: 1.5;
}

.step-note strong {
  color: #0f172a !important;
}

/* =========================================================
   Warnings
========================================================= */

.warning-stack {
  display: grid;
  gap: 7px;
  margin-top: 8px;
  min-height: 0;
}

.warning-card {
  display: none;
  padding: 9px 11px;
  border-radius: 10px;
  border: 1px solid #d97706;
  background: #fff8eb;
  color: #7c2d12 !important;
  font-size: 11.75px;
  font-weight: 500;
  line-height: 1.45;
  box-shadow: 0 3px 8px rgba(180, 83, 9, 0.07);
}

.warning-card.is-visible {
  display: block;
}

.warning-card strong {
  color: #7c2d12 !important;
}

.physicality-warning {
  border-color: #b91c1c !important;
  background: linear-gradient(180deg, #fff1f2 0%, #ffffff 100%) !important;
  color: #7f1d1d !important;
}

.physicality-warning strong {
  color: #7f1d1d !important;
}

/* =========================================================
   Source / Standards / Assumptions
========================================================= */

.source-card {
  background: linear-gradient(180deg, #ffffff 0%, #fbfcfe 100%) !important;
}

.source-list {
  display: grid;
  gap: 8px;
  padding: 10px;
  border: 1px solid #dbe3ec;
  border-radius: 11px;
  background: linear-gradient(180deg, #fbfcfe 0%, #f8fafc 100%);
}

.standard-badge,
.assumption-badge {
  width: fit-content;
  display: inline-flex;
  align-items: center;
  min-height: 25px;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid #b7cde7;
  background: #eef4fb;
  color: var(--t2e-blue-2);
  font-size: 10.75px;
  font-weight: 800;
}

.assumption-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.assumption-badge {
  background: #f8fafc;
  border-color: #dbe3ec;
  color: #334155;
}

#sourceDescription {
  margin: 0;
  color: #475569 !important;
  font-size: 12px;
  line-height: 1.5;
}

.assumption-list {
  display: grid;
  gap: 6px;
}

.assumption-list li {
  position: relative;
  padding-left: 17px;
  color: #475569 !important;
  font-size: 11.75px;
  line-height: 1.5;
}

.assumption-list li::before {
  content: "•";
  position: absolute;
  left: 4px;
  color: var(--t2e-blue);
  font-weight: 800;
}

/* =========================================================
   Actions / Buttons / Icons
========================================================= */

.print-summary {
  display: none;
}

.ui-icon {
  width: 15px;
  height: 15px;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.help-toggle,
.action-btn {
  appearance: none;
  -webkit-appearance: none;
  border: 1px solid #d1dbe7 !important;
  background: #ffffff !important;
  color: #162338 !important;
  cursor: pointer;
  transition: background-color .16s ease, border-color .16s ease, box-shadow .16s ease, transform .08s ease;
  text-decoration: none !important;
  font-family: inherit !important;
}

.help-toggle {
  width: var(--control-height-desktop);
  height: var(--control-height-desktop);
  min-width: var(--control-height-desktop);
  min-height: var(--control-height-desktop);
  max-width: var(--control-height-desktop);
  max-height: var(--control-height-desktop);
  display: inline-grid;
  place-items: center;
  padding: 0 !important;
  margin: 0 !important;
  box-sizing: border-box;
  box-shadow: inset 0 1px 2px rgba(15, 23, 42, 0.03) !important;
  border-radius: 9px !important;
  line-height: 1 !important;
}

.action-btn {
  min-height: 38px;
  padding: 0 12px;
  font-size: 11.75px;
  font-weight: 750;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border-radius: 9px !important;
}

.help-toggle:hover,
.action-btn:hover {
  background: #f8fafc !important;
  border-color: #c3d0de !important;
  transform: translateY(-1px);
}

.help-toggle:focus-visible,
.action-btn:focus-visible,
select:focus-visible,
input:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: none;
  box-shadow: var(--highlight-ring);
}

.action-btn.is-success {
  background: #edf9f0 !important;
  border-color: rgba(22, 101, 52, 0.22) !important;
  color: #166534 !important;
}

.actions-row {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
  margin: 9px 0 0;
}

.actions-row .action-btn {
  flex: 1 1 145px;
}

.actions-row--external {
  margin-top: 10px;
}

.sr-only,
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.mobile-sticky-result {
  display: none;
}

/* =========================================================
   Desktop
========================================================= */

@media (min-width: 1025px) {
  .calc-breadcrumbs-wrap {
    width: 100% !important;
    max-width: none !important;
    padding-left: 18px !important;
    padding-right: 18px !important;
    margin: 8px auto 6px !important;
  }

  .calc-breadcrumbs {
    max-width: var(--calc-shell-max-width-desktop) !important;
    margin-left: auto !important;
    margin-right: auto !important;
  }

  body.calculator-page .site-content .calc-breadcrumbs-wrap,
  body.calculator-page .content-area .calc-breadcrumbs-wrap,
  body.calculator-page .entry-content .calc-breadcrumbs-wrap,
  body.calculator-page .ast-container .calc-breadcrumbs-wrap,
  body.calculator-page .ast-container-fluid .calc-breadcrumbs-wrap,
  body.calculator-page .ast-article-single .calc-breadcrumbs-wrap,
  body.calculator-page .inside-article .calc-breadcrumbs-wrap,
  body.calculator-page article .calc-breadcrumbs-wrap {
    max-width: none !important;
    padding-left: 18px !important;
    padding-right: 18px !important;
  }

  body.calculator-page .site-content .calc-breadcrumbs,
  body.calculator-page .content-area .calc-breadcrumbs,
  body.calculator-page .entry-content .calc-breadcrumbs,
  body.calculator-page .ast-container .calc-breadcrumbs,
  body.calculator-page .ast-container-fluid .calc-breadcrumbs,
  body.calculator-page .ast-article-single .calc-breadcrumbs,
  body.calculator-page .inside-article .calc-breadcrumbs,
  body.calculator-page article .calc-breadcrumbs {
    max-width: var(--calc-shell-max-width-desktop) !important;
  }

  body.calculator-page .entry-content > .calc-breadcrumbs,
  body.calculator-page .ast-container > .calc-breadcrumbs,
  body.calculator-page .ast-container-fluid > .calc-breadcrumbs,
  body.calculator-page .site-content > .calc-breadcrumbs,
  body.calculator-page .content-area > .calc-breadcrumbs,
  body.calculator-page article > .calc-breadcrumbs {
    width: calc(100% - 36px) !important;
    max-width: var(--calc-shell-max-width-desktop) !important;
    margin-left: auto !important;
    margin-right: auto !important;
  }

  .calculator-section {
    max-width: none !important;
    width: 100% !important;
    margin: 8px auto 10px !important;
    padding: 0 18px 8px !important;
  }

  .calc-layout {
    max-width: var(--calc-shell-max-width-desktop) !important;
    width: 100% !important;
    margin: 0 auto !important;
  }

  .panel-card,
  .form-card,
  .setup-card,
  .optional-card,
  .equation-top-card,
  .result-card,
  .source-card,
  .visual-card,
  .title-container.simple {
    padding-left: 16px !important;
    padding-right: 16px !important;
  }
}

@media (min-width: 1400px) {
  .calc-breadcrumbs {
    max-width: var(--calc-shell-max-width-wide) !important;
  }

  body.calculator-page .site-content .calc-breadcrumbs,
  body.calculator-page .content-area .calc-breadcrumbs,
  body.calculator-page .entry-content .calc-breadcrumbs,
  body.calculator-page .ast-container .calc-breadcrumbs,
  body.calculator-page .ast-container-fluid .calc-breadcrumbs,
  body.calculator-page .ast-article-single .calc-breadcrumbs,
  body.calculator-page .inside-article .calc-breadcrumbs,
  body.calculator-page article .calc-breadcrumbs {
    max-width: var(--calc-shell-max-width-wide) !important;
  }

  body.calculator-page .entry-content > .calc-breadcrumbs,
  body.calculator-page .ast-container > .calc-breadcrumbs,
  body.calculator-page .ast-container-fluid > .calc-breadcrumbs,
  body.calculator-page .site-content > .calc-breadcrumbs,
  body.calculator-page .content-area > .calc-breadcrumbs,
  body.calculator-page article > .calc-breadcrumbs {
    max-width: var(--calc-shell-max-width-wide) !important;
  }

  .calc-layout {
    max-width: var(--calc-shell-max-width-wide) !important;
  }
}

/* =========================================================
   Tablet
========================================================= */

@media (max-width: 1024px) {
  .calculator-section {
    max-width: none !important;
  }

  .calc-layout {
    max-width: none !important;
  }

  .setup-grid,
  .advanced-inline-grid,
  .active-inputs-grid {
    grid-template-columns: 1fr;
  }

  .actions-row .action-btn {
    flex: 1 1 100%;
  }
}

@media (max-width: 921px) {
  body.calculator-page .ast-container,
  body.calculator-page .ast-container-fluid,
  body.calculator-page .site-content > .ast-container,
  body.calculator-page .entry-content > .ast-container,
  body.calculator-page .entry-content > .ast-container-fluid {
    padding-left: 0 !important;
    padding-right: 0 !important;
  }
}

/* =========================================================
   Mobile
========================================================= */

@media (max-width: 768px) {
  html,
  body,
  body.calculator-page,
  body.calculator-page .site,
  body.calculator-page .site-content,
  body.calculator-page .content-area,
  body.calculator-page .entry-content,
  body.calculator-page .ast-container,
  body.calculator-page .ast-container-fluid,
  body.calculator-page .inside-article,
  body.calculator-page article {
    margin-left: 0 !important;
    margin-right: 0 !important;
    padding-left: 0 !important;
    padding-right: 0 !important;
    max-width: none !important;
  }

  .calc-breadcrumbs-wrap {
    width: 100% !important;
    max-width: none !important;
    margin: 0 !important;
    padding: 8px 10px 6px !important;
    border-bottom: 1px solid rgba(148, 163, 184, 0.22) !important;
    background: #ffffff !important;
    overflow: hidden !important;
    text-align: left !important;
  }

  .calc-breadcrumbs {
    width: 100% !important;
    max-width: none !important;
    margin: 0 !important;
    padding: 0 !important;
    text-align: left !important;
  }

  .calc-breadcrumbs ol {
    width: 100% !important;
    max-width: 100% !important;
    gap: 5px !important;
    justify-content: flex-start !important;
    text-align: left !important;
  }

  .calc-breadcrumbs li {
    font-size: 12px !important;
    line-height: 1.35 !important;
  }

  body.calculator-page .site-content .calc-breadcrumbs-wrap,
  body.calculator-page .content-area .calc-breadcrumbs-wrap,
  body.calculator-page .entry-content .calc-breadcrumbs-wrap,
  body.calculator-page .ast-container .calc-breadcrumbs-wrap,
  body.calculator-page .ast-container-fluid .calc-breadcrumbs-wrap,
  body.calculator-page .ast-article-single .calc-breadcrumbs-wrap,
  body.calculator-page .inside-article .calc-breadcrumbs-wrap,
  body.calculator-page article .calc-breadcrumbs-wrap {
    width: 100% !important;
    max-width: none !important;
    margin: 0 !important;
    padding: 8px 10px 6px !important;
    text-align: left !important;
  }

  body.calculator-page .site-content .calc-breadcrumbs,
  body.calculator-page .content-area .calc-breadcrumbs,
  body.calculator-page .entry-content .calc-breadcrumbs,
  body.calculator-page .ast-container .calc-breadcrumbs,
  body.calculator-page .ast-container-fluid .calc-breadcrumbs,
  body.calculator-page .ast-article-single .calc-breadcrumbs,
  body.calculator-page .inside-article .calc-breadcrumbs,
  body.calculator-page article .calc-breadcrumbs {
    width: 100% !important;
    max-width: none !important;
    margin: 0 !important;
    text-align: left !important;
  }

  body.calculator-page .entry-content > .calc-breadcrumbs,
  body.calculator-page .ast-container > .calc-breadcrumbs,
  body.calculator-page .ast-container-fluid > .calc-breadcrumbs,
  body.calculator-page .site-content > .calc-breadcrumbs,
  body.calculator-page .content-area > .calc-breadcrumbs,
  body.calculator-page article > .calc-breadcrumbs {
    width: 100% !important;
    max-width: none !important;
    margin: 0 !important;
    padding: 8px 10px 6px !important;
    border-bottom: 1px solid rgba(148, 163, 184, 0.22) !important;
    background: #ffffff !important;
    text-align: left !important;
  }

  body.calculator-page .entry-content > .calc-breadcrumbs ol,
  body.calculator-page .ast-container > .calc-breadcrumbs ol,
  body.calculator-page .ast-container-fluid > .calc-breadcrumbs ol,
  body.calculator-page .site-content > .calc-breadcrumbs ol,
  body.calculator-page .content-area > .calc-breadcrumbs ol,
  body.calculator-page article > .calc-breadcrumbs ol {
    justify-content: flex-start !important;
  }

  .calculator-section {
    width: 100%;
    max-width: none;
    margin: 0 !important;
    padding: 0 0 calc(var(--mobile-safe-bottom) + 8px) !important;
  }

  .calc-layout {
    width: 100%;
    max-width: none;
    gap: 0;
  }

  .panel-card,
  .form-card,
  .setup-card,
  .optional-card,
  .equation-top-card,
  .title-container.simple,
  .result-card,
  .source-card,
  .visual-card {
    width: 100%;
    border-radius: 0 !important;
    border-left: none !important;
    border-right: none !important;
    padding-left: 10px !important;
    padding-right: 10px !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
  }

  .input-row--full {
    grid-column: auto;
  }

  .input-group {
    grid-template-columns: minmax(0, 1fr) minmax(84px, 112px) var(--control-height-mobile);
    gap: 5px;
    align-items: stretch !important;
  }

  .input-group--single {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) !important;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
  }

  .calculator-section .input-group > input[type="number"],
  .calculator-section .input-group > input[type="text"],
  .calculator-section .input-group > select,
  .calculator-section .input-group > .unit-chip,
  .calculator-section .input-group > .help-toggle {
    height: var(--control-height-mobile) !important;
    min-height: var(--control-height-mobile) !important;
    max-height: var(--control-height-mobile) !important;
    box-sizing: border-box !important;
    align-self: stretch !important;
    margin: 0 !important;
    border-width: 1px !important;
  }

  .calculator-section .input-group > input[type="number"],
  .calculator-section .input-group > input[type="text"] {
    display: block !important;
    padding-top: 0 !important;
    padding-bottom: 0 !important;
    line-height: normal !important;
  }

  .calculator-section .input-group > select {
    display: block !important;
    appearance: none !important;
    -webkit-appearance: none !important;
    padding-top: 0 !important;
    padding-bottom: 0 !important;
    line-height: normal !important;
    vertical-align: top !important;
    background-clip: padding-box !important;
    transform: translateZ(0);
  }

  .calculator-section .input-group > .unit-chip {
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    padding-top: 0 !important;
    padding-bottom: 0 !important;
    line-height: 1 !important;
  }

  .calculator-section .input-group > .help-toggle {
    display: inline-grid !important;
    place-items: center !important;
    width: var(--control-height-mobile) !important;
    min-width: var(--control-height-mobile) !important;
    max-width: var(--control-height-mobile) !important;
    padding: 0 !important;
    line-height: 1 !important;
  }

  .calculator-section .input-group:not(.input-group--single) select {
    min-width: 84px !important;
    max-width: 112px !important;
    font-size: 13px !important;
    line-height: normal !important;
  }

  .calculator-section .input-group--single,
  .setup-card .input-group--single,
  .advanced-inline-card .input-group--single {
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
  }

  .calculator-section .input-group--single select,
  .setup-card .input-group--single select,
  .advanced-inline-card .input-group--single select {
    display: block !important;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    height: var(--control-height-mobile) !important;
    min-height: var(--control-height-mobile) !important;
    max-height: var(--control-height-mobile) !important;
    line-height: normal !important;
  }

  .steps-card,
  .quick-stats,
  .result-row,
  .advanced-inline-card,
  .step-equation-box,
  .source-list,
  .visual-shell {
    border-radius: 10px;
  }

  .steps-card summary {
    padding: 11px;
    gap: 9px;
  }

  .steps-card summary::before {
    width: 30px;
    height: 30px;
    border-radius: 9px;
    flex-basis: 30px;
  }

  .steps-card-body {
    padding: 9px;
  }

  .steps-list li {
    padding: 9px 9px 9px 46px;
    border-radius: 9px;
    font-size: 11.75px;
    line-height: 1.5;
  }

  .steps-list li::before {
    top: 9px;
    left: 9px;
    width: 25px;
    height: 25px;
    border-radius: 999px;
    font-size: 10.5px;
  }

  .t2e-equation-block {
    padding: 36px 12px 18px;
    min-height: 92px;
  }

  .visual-shell {
    min-height: 170px;
    aspect-ratio: 16 / 9;
  }

  .visual-shell--diagram {
    min-height: 240px;
    aspect-ratio: 4 / 3;
  }

  .visual-svg {
    max-height: 340px;
  }

  .visual-shell--diagram .visual-svg {
    max-height: 380px;
  }

  .visual-svg text {
    font-size: 22px;
  }

  .visual-svg .visual-label,
  .visual-svg .diagram-label {
    font-size: 26px;
  }

  .visual-svg .visual-sub-label,
  .visual-svg .diagram-sub-label {
    font-size: 19px;
  }

  .visual-svg .visual-result,
  .visual-svg .diagram-result {
    font-size: 24px;
  }

  .mobile-sticky-result {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    padding: 9px 11px calc(9px + env(safe-area-inset-bottom, 0px));
    background: rgba(255, 255, 255, 0.98) !important;
    border-top: 1px solid #dbe3ec !important;
    box-shadow: 0 -8px 18px rgba(15, 23, 42, 0.075);
    backdrop-filter: blur(8px);
  }

  .mobile-sticky-result__meta {
    min-width: 0;
  }

  .mobile-sticky-result__label {
    color: var(--muted) !important;
    font-size: 11.5px;
    font-weight: 700;
  }

  .mobile-sticky-result__value-wrap {
    display: flex;
    align-items: baseline;
    justify-content: flex-end;
    gap: 7px;
    margin-left: auto;
    text-align: right;
  }

  .mobile-sticky-result__value {
    font-size: 21px;
    font-weight: 800;
    color: var(--ink) !important;
    line-height: 1;
  }

  .mobile-sticky-result__unit {
    font-size: 10.5px;
    font-weight: 800;
    color: #162338 !important;
    background: #eef2f7 !important;
    padding: 4px 7px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border: 1px solid #d7e2ee !important;
  }
}

@media (max-width: 560px) {
  .input-group {
    grid-template-columns: minmax(0, 1fr) minmax(78px, 96px) var(--control-height-mobile);
    gap: 5px;
    align-items: stretch !important;
  }

  .input-group--single {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) !important;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
  }

  .calculator-section .input-group > input[type="number"],
  .calculator-section .input-group > input[type="text"],
  .calculator-section .input-group > select,
  .calculator-section .input-group > .unit-chip,
  .calculator-section .input-group > .help-toggle {
    height: var(--control-height-mobile) !important;
    min-height: var(--control-height-mobile) !important;
    max-height: var(--control-height-mobile) !important;
    box-sizing: border-box !important;
    align-self: stretch !important;
    margin: 0 !important;
    border-width: 1px !important;
  }

  .calculator-section input[type="number"],
  .calculator-section input[type="text"],
  .calculator-section select {
    font-size: 13.5px !important;
    line-height: normal !important;
  }

  .calculator-section .input-group:not(.input-group--single) select {
    min-width: 78px !important;
    max-width: 96px !important;
    padding-left: 7px !important;
    padding-right: 24px !important;
    line-height: normal !important;
  }

  .calculator-section .input-group > .help-toggle {
    width: var(--control-height-mobile) !important;
    min-width: var(--control-height-mobile) !important;
    max-width: var(--control-height-mobile) !important;
  }

  .calculator-section .input-group--single,
  .setup-card .input-group--single,
  .advanced-inline-card .input-group--single {
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
  }

  .calculator-section .input-group--single select,
  .setup-card .input-group--single select,
  .advanced-inline-card .input-group--single select {
    display: block !important;
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    height: var(--control-height-mobile) !important;
    min-height: var(--control-height-mobile) !important;
    max-height: var(--control-height-mobile) !important;
    line-height: normal !important;
  }

  #calculatedValue {
    font-size: clamp(22px, 7.5vw, 31px);
  }

  .t2e-equation-block mjx-container {
    font-size: clamp(1.05rem, 5vw, 1.28rem) !important;
  }

  .step-equation-box__math mjx-container {
    font-size: 1rem !important;
  }

  .visual-shell--diagram {
    min-height: 230px;
    aspect-ratio: 4 / 3;
  }
}

@media (max-width: 390px) {
  .input-group {
    grid-template-columns: minmax(0, 1fr) !important;
    align-items: stretch !important;
  }

  .calculator-section .input-group:not(.input-group--single) select,
  .calculator-section .input-group > .help-toggle,
  .calculator-section .input-group > .unit-chip {
    width: 100% !important;
    max-width: none !important;
    min-width: 0 !important;
  }

  .calculator-section .input-group > input[type="number"],
  .calculator-section .input-group > input[type="text"],
  .calculator-section .input-group > select,
  .calculator-section .input-group > .unit-chip,
  .calculator-section .input-group > .help-toggle {
    height: var(--control-height-mobile) !important;
    min-height: var(--control-height-mobile) !important;
    max-height: var(--control-height-mobile) !important;
    align-self: stretch !important;
    margin: 0 !important;
  }
}

/* =========================================================
   iPhone Safari Select Height Correction
========================================================= */

@supports (-webkit-touch-callout: none) {
  @media (max-width: 768px) {
    .calculator-section .input-group:not(.input-group--single) > select {
      height: calc(var(--control-height-mobile) + 2px) !important;
      min-height: calc(var(--control-height-mobile) + 2px) !important;
      max-height: calc(var(--control-height-mobile) + 2px) !important;
      margin-top: -1px !important;
      margin-bottom: -1px !important;
      line-height: normal !important;
      border-radius: 9px !important;
      -webkit-border-radius: 9px !important;
      background-clip: padding-box !important;
    }

    .calculator-section .input-group.input-group--single > select,
    .setup-card .input-group--single > select,
    .advanced-inline-card .input-group--single > select {
      height: var(--control-height-mobile) !important;
      min-height: var(--control-height-mobile) !important;
      max-height: var(--control-height-mobile) !important;
      margin-top: 0 !important;
      margin-bottom: 0 !important;
      line-height: normal !important;
    }
  }
}

/* =========================================================
   Print
========================================================= */

@media print {
  .mobile-sticky-result,
  .actions-row,
  .help-toggle {
    display: none !important;
  }

  .calc-breadcrumbs-wrap {
    max-width: none !important;
    margin: 0 0 8px !important;
    padding: 0 !important;
    border: none !important;
    background: transparent !important;
    text-align: left !important;
  }

  .calc-breadcrumbs {
    max-width: none !important;
    text-align: left !important;
  }

  .calc-breadcrumbs ol {
    justify-content: flex-start !important;
    text-align: left !important;
  }

  body.calculator-page {
    background: #ffffff !important;
    color: #111827 !important;
  }

  .calculator-section {
    padding: 0 !important;
    margin: 0 !important;
  }

  .calc-layout {
    max-width: none !important;
  }

  .card,
  .panel-card,
  .form-card,
  .setup-card,
  .equation-top-card,
  .result-card,
  .source-card,
  .visual-card,
  .steps-card,
  .print-summary {
    box-shadow: none !important;
    border: 1px solid #d1d5db !important;
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .steps-card {
    display: block !important;
  }

  .steps-card[open] .steps-card-body,
  .steps-card .steps-card-body {
    display: block !important;
  }

  .visual-shell {
    max-height: 280px;
  }

  .visual-shell--diagram {
    max-height: 360px;
  }

  .print-summary {
    display: block !important;
    background: #ffffff !important;
    padding: 12px;
    margin: 12px 0;
  }

  .print-summary h2 {
    margin: 0 0 8px;
    font-size: 16px;
  }

  .print-summary dl {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 6px 12px;
    margin: 0;
  }

  .print-summary dt {
    font-weight: 700;
  }

  .print-summary dd {
    margin: 0;
  }
}