/* ==========================================================================
   BarrioRadar - Public Methodology Page Stylesheet (/methodology/)
   Design System: Editorial Data Journalism, Interactive D3 Explainers,
   Flat Solid Palette, Responsive 320px-1440px, Reduced-Motion Aware
   ========================================================================== */

.meth-page {
  background-color: var(--br-color-bg-pure, #FFFFFF);
  color: var(--br-color-text-main, #0F172A);
  font-family: var(--br-font-sans, 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif);
}

.meth-container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
  box-sizing: border-box;
}

/* Clean Section Eyebrow Tags (Zero Pill Background Invariant) */
.meth-page .section-tag {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--br-color-brand-accent, #2563EB);
  margin: 0 0 8px 0;
  background: transparent;
  border: none;
  padding: 0;
}

.meth-section--dark .section-tag {
  color: #60A5FA;
}

/* --------------------------------------------------------------------------
   1. Hero Section
   -------------------------------------------------------------------------- */
.meth-hero {
  background-color: var(--br-color-bg-subtle, #F8FAFC);
  border-bottom: 1px solid var(--br-color-border-light, #E2E8F0);
  padding: 44px 0 36px;
}

.meth-hero-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.65fr;
  gap: 36px;
  align-items: start;
}

.meth-hero-title {
  font-size: 2.375rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--br-color-text-main, #0F172A);
  margin: 0 0 14px 0;
}

.meth-hero-lead {
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--br-color-text-secondary, #475569);
  margin: 0 0 20px 0;
  max-width: 66ch;
}

.meth-hero-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.meth-jump-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--br-color-text-secondary, #475569);
  background: var(--br-color-bg-pure, #FFFFFF);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-radius: var(--br-radius-sm, 6px);
  padding: 7px 12px;
  text-decoration: none;
  transition: border-color 0.15s ease, color 0.15s ease, background-color 0.15s ease;
}

.meth-jump-link:hover {
  border-color: var(--br-color-brand-accent, #2563EB);
  color: var(--br-color-brand-accent, #2563EB);
  background: var(--br-color-brand-accent-subtle, #EFF6FF);
}

.meth-hero-scope-card {
  background: var(--br-color-bg-pure, #FFFFFF);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-left: 4px solid var(--br-color-brand-accent, #2563EB);
  border-radius: var(--br-radius-md, 8px);
  padding: 20px 22px;
  box-shadow: var(--br-shadow-xs);
}

.meth-hero-scope-title {
  font-size: 0.875rem;
  font-weight: 800;
  color: var(--br-color-text-main, #0F172A);
  margin: 0 0 8px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.meth-hero-scope-text {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--br-color-text-secondary, #475569);
  margin: 0 0 12px 0;
}

.meth-hero-scope-note {
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--br-color-text-muted, #64748B);
  padding-top: 10px;
  border-top: 1px solid var(--br-color-border-light, #E2E8F0);
  margin: 0;
}

/* --------------------------------------------------------------------------
   Shared Section Layout
   -------------------------------------------------------------------------- */
.meth-section {
  padding: 64px 0;
  border-bottom: 1px solid var(--br-color-border-light, #E2E8F0);
}

.meth-section--subtle {
  background-color: var(--br-color-bg-subtle, #F8FAFC);
}

.meth-section--dark {
  background-color: var(--br-color-bg-dark, #0F172A);
  color: #F8FAFC;
  border-bottom: 1px solid #1E293B;
}

.meth-sec-header {
  max-width: 760px;
  margin-bottom: 32px;
}

.meth-sec-title {
  font-size: 1.75rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.025em;
  color: var(--br-color-text-main, #0F172A);
  margin: 0 0 12px 0;
}

.meth-section--dark .meth-sec-title {
  color: #FFFFFF;
}

.meth-sec-desc {
  font-size: 0.96875rem;
  line-height: 1.65;
  color: var(--br-color-text-secondary, #475569);
  margin: 0;
}

.meth-section--dark .meth-sec-desc {
  color: #94A3B8;
}

/* --------------------------------------------------------------------------
   2. Section 2: Seven Dimensions Interactive Radial Explorer
   -------------------------------------------------------------------------- */
.meth-dim-explorer {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 32px;
  align-items: start;
  background: var(--br-color-bg-pure, #FFFFFF);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-radius: var(--br-radius-lg, 10px);
  padding: 28px;
  box-shadow: var(--br-shadow-sm);
}

.meth-dim-vis-col {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.meth-dim-svg-wrap {
  width: 100%;
  max-width: 390px;
  aspect-ratio: 1 / 1;
  position: relative;
}

.meth-dim-svg-wrap svg {
  width: 100%;
  height: 100%;
  display: block;
  overflow: visible;
}

.meth-dim-vis-caption {
  font-size: 0.75rem;
  line-height: 1.5;
  color: var(--br-color-text-muted, #64748B);
  text-align: center;
  margin: 12px 0 0 0;
  max-width: 340px;
}

/* Dimension Selector Button Strip */
.meth-dim-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.meth-dim-tab {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--br-color-text-secondary, #475569);
  background: var(--br-color-bg-subtle, #F8FAFC);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-radius: var(--br-radius-sm, 6px);
  padding: 8px 12px;
  cursor: pointer;
  min-height: 38px;
  transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

.meth-dim-tab:hover {
  border-color: var(--br-color-border-strong, #94A3B8);
  color: var(--br-color-text-main, #0F172A);
}

.meth-dim-tab.is-active {
  background: var(--br-color-bg-pure, #FFFFFF);
  color: var(--br-color-text-main, #0F172A);
  border-color: var(--dim-accent, #2563EB);
  border-width: 1.5px;
  box-shadow: 0 2px 8px rgba(15, 23, 42, 0.08);
}

.meth-dim-tab-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background-color: var(--dim-accent, #2563EB);
  flex-shrink: 0;
}

/* Synchronized Dimension Inspector Panel */
.meth-dim-inspector {
  background: var(--br-color-bg-subtle, #F8FAFC);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-top: 3px solid var(--inspector-accent, #2563EB);
  border-radius: var(--br-radius-md, 8px);
  padding: 24px;
}

.meth-dim-inspector-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.meth-dim-inspector-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--br-radius-sm, 6px);
  background: var(--br-color-bg-pure, #FFFFFF);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--inspector-accent, #2563EB);
  flex-shrink: 0;
}

.meth-dim-inspector-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--br-color-text-main, #0F172A);
  margin: 0;
}

.meth-dim-inspector-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.meth-dim-inspector-block {
  background: var(--br-color-bg-pure, #FFFFFF);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-radius: var(--br-radius-sm, 6px);
  padding: 14px 16px;
}

.meth-dim-inspector-label {
  display: block;
  font-size: 0.6875rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--br-color-text-muted, #64748B);
  margin-bottom: 6px;
}

.meth-dim-inspector-text {
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--br-color-text-secondary, #475569);
  margin: 0;
}

.meth-dim-inspector-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--br-color-border-light, #E2E8F0);
}

.meth-dim-meta-val {
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--br-color-text-main, #0F172A);
  font-weight: 600;
  margin: 0;
}

/* Static Indexable HTML Summary Grid below interactive explorer */
.meth-dim-summary-details {
  margin-top: 20px;
  background: var(--br-color-bg-subtle, #F8FAFC);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-radius: var(--br-radius-md, 8px);
  padding: 14px 20px;
}

.meth-dim-summary-toggle {
  font-size: 0.84375rem;
  font-weight: 700;
  color: var(--br-color-text-main, #0F172A);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
}

.meth-dim-summary-toggle::-webkit-details-marker {
  display: none;
}

.meth-dim-static-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--br-color-border-light, #E2E8F0);
}

.meth-dim-static-item {
  background: var(--br-color-bg-pure, #FFFFFF);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-radius: var(--br-radius-sm, 6px);
  padding: 14px 16px;
}

.meth-dim-static-item h3 {
  font-size: 0.9375rem;
  font-weight: 800;
  color: var(--br-color-text-main, #0F172A);
  margin: 0 0 6px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.meth-dim-static-item p {
  font-size: 0.8125rem;
  line-height: 1.55;
  color: var(--br-color-text-secondary, #475569);
  margin: 0 0 8px 0;
}

.meth-dim-static-source {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--br-color-text-muted, #64748B);
  margin: 0 !important;
}

/* --------------------------------------------------------------------------
   3. Section 3: Why Nearby Does Not Always Mean Accessible (D3 Routing)
   -------------------------------------------------------------------------- */
.meth-routing-shell {
  background: var(--br-color-bg-pure, #FFFFFF);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-radius: var(--br-radius-lg, 10px);
  padding: 24px 28px;
  box-shadow: var(--br-shadow-sm);
}

.meth-routing-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--br-color-border-light, #E2E8F0);
}

.meth-routing-badge {
  font-family: var(--br-font-mono, 'JetBrains Mono', monospace);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--br-color-text-muted, #64748B);
  background: var(--br-color-bg-subtle, #F8FAFC);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  padding: 5px 10px;
  border-radius: var(--br-radius-xs, 4px);
}

.meth-mode-switch {
  display: inline-flex;
  background: var(--br-color-bg-muted, #F1F5F9);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-radius: var(--br-radius-sm, 6px);
  padding: 3px;
  gap: 4px;
}

.meth-mode-btn {
  font-family: inherit;
  font-size: 0.84375rem;
  font-weight: 700;
  color: var(--br-color-text-secondary, #475569);
  background: transparent;
  border: none;
  border-radius: var(--br-radius-xs, 4px);
  padding: 8px 16px;
  cursor: pointer;
  min-height: 38px;
  transition: background-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

.meth-mode-btn.is-active {
  background: var(--br-color-brand-accent, #2563EB);
  color: #FFFFFF;
  box-shadow: var(--br-shadow-xs);
}

.meth-routing-stage {
  display: grid;
  grid-template-columns: 1.35fr 0.65fr;
  gap: 24px;
  align-items: center;
}

.meth-routing-canvas {
  width: 100%;
  background: #F8FAFC;
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-radius: var(--br-radius-md, 8px);
  overflow: hidden;
}

.meth-routing-canvas svg {
  width: 100%;
  height: auto;
  display: block;
}

.meth-routing-explain {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.meth-routing-status-card {
  background: var(--br-color-bg-subtle, #F8FAFC);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-left: 4px solid var(--br-color-brand-accent, #2563EB);
  border-radius: var(--br-radius-sm, 6px);
  padding: 16px 18px;
}

.meth-routing-status-card.is-straight {
  border-left-color: #D97706;
}

.meth-routing-status-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--br-color-text-main, #0F172A);
  margin: 0 0 6px 0;
}

.meth-routing-status-body {
  font-size: 0.84375rem;
  line-height: 1.6;
  color: var(--br-color-text-secondary, #475569);
  margin: 0;
}

.meth-routing-principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 24px;
}

.meth-principle-box {
  background: var(--br-color-bg-pure, #FFFFFF);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-radius: var(--br-radius-md, 8px);
  padding: 18px 20px;
}

.meth-principle-box h3 {
  font-size: 0.9375rem;
  font-weight: 800;
  color: var(--br-color-text-main, #0F172A);
  margin: 0 0 8px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.meth-principle-box p {
  font-size: 0.84375rem;
  line-height: 1.6;
  color: var(--br-color-text-secondary, #475569);
  margin: 0;
}

/* --------------------------------------------------------------------------
   4. Section 4: What a BarrioRadar Score Means (Grade Spectrum)
   -------------------------------------------------------------------------- */
.meth-grade-spectrum-card {
  background: var(--br-color-bg-pure, #FFFFFF);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-radius: var(--br-radius-lg, 10px);
  padding: 28px;
  box-shadow: var(--br-shadow-sm);
  margin-bottom: 24px;
}

.meth-grade-bar-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
  margin-bottom: 22px;
}

.meth-grade-band-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  background: var(--br-color-bg-subtle, #F8FAFC);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-top: 4px solid var(--grade-color, #2563EB);
  border-radius: var(--br-radius-sm, 6px);
  padding: 12px 14px;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.meth-grade-band-btn:hover {
  background: var(--br-color-bg-pure, #FFFFFF);
  box-shadow: var(--br-shadow-xs);
}

.meth-grade-band-btn.is-active {
  background: var(--br-color-bg-pure, #FFFFFF);
  border-color: var(--grade-color, #2563EB);
  box-shadow: 0 2px 10px rgba(15, 23, 42, 0.09);
  transform: translateY(-1px);
}

.meth-grade-letter {
  font-family: var(--br-font-mono, 'JetBrains Mono', monospace);
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--br-color-text-main, #0F172A);
  line-height: 1.1;
  margin-bottom: 4px;
}

.meth-grade-range {
  font-family: var(--br-font-mono, 'JetBrains Mono', monospace);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--br-color-text-muted, #64748B);
  margin-bottom: 6px;
}

.meth-grade-short {
  font-size: 0.78125rem;
  font-weight: 700;
  color: var(--br-color-text-secondary, #475569);
  line-height: 1.35;
}

.meth-grade-detail-panel {
  background: var(--br-color-bg-subtle, #F8FAFC);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-left: 4px solid var(--active-grade-color, #059669);
  border-radius: var(--br-radius-md, 8px);
  padding: 20px 24px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 20px;
  align-items: center;
}

.meth-grade-detail-badge {
  width: 64px;
  height: 64px;
  border-radius: var(--br-radius-md, 8px);
  background: var(--br-color-bg-pure, #FFFFFF);
  border: 2px solid var(--active-grade-color, #059669);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: var(--br-font-mono, 'JetBrains Mono', monospace);
}

.meth-grade-detail-badge strong {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--br-color-text-main, #0F172A);
  line-height: 1;
}

.meth-grade-detail-badge span {
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--br-color-text-muted, #64748B);
  margin-top: 3px;
}

.meth-grade-detail-content h3 {
  font-size: 1.0625rem;
  font-weight: 800;
  color: var(--br-color-text-main, #0F172A);
  margin: 0 0 6px 0;
}

.meth-grade-detail-content p {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--br-color-text-secondary, #475569);
  margin: 0;
}

.meth-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

.meth-info-card {
  background: var(--br-color-bg-pure, #FFFFFF);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-radius: var(--br-radius-md, 8px);
  padding: 22px 24px;
}

.meth-info-card h3 {
  font-size: 1.03125rem;
  font-weight: 800;
  color: var(--br-color-text-main, #0F172A);
  margin: 0 0 10px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.meth-info-card p {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--br-color-text-secondary, #475569);
  margin: 0 0 10px 0;
}

.meth-info-card p:last-child {
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   5. Section 5: Official Data Sources Split Supplement
   -------------------------------------------------------------------------- */
.meth-sources-split-bar {
  background-color: #0B1120;
  border-bottom: 1px solid #1E293B;
  padding: 36px 0 44px;
  color: #E2E8F0;
}

.meth-sources-split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.meth-source-role-card {
  background: #1E293B;
  border: 1px solid #334155;
  border-radius: var(--br-radius-md, 8px);
  padding: 22px 24px;
}

.meth-source-role-card--scoring {
  border-top: 3px solid #38BDF8;
}

.meth-source-role-card--context {
  border-top: 3px solid #94A3B8;
}

.meth-source-role-badge {
  display: inline-block;
  font-family: var(--br-font-mono, 'JetBrains Mono', monospace);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 8px;
  border-radius: 4px;
  margin-bottom: 10px;
}

.meth-source-role-card--scoring .meth-source-role-badge {
  background: rgba(56, 189, 248, 0.15);
  color: #38BDF8;
}

.meth-source-role-card--context .meth-source-role-badge {
  background: rgba(148, 163, 184, 0.15);
  color: #CBD5E1;
}

.meth-source-role-card h3 {
  font-size: 1.0625rem;
  font-weight: 800;
  color: #FFFFFF;
  margin: 0 0 8px 0;
}

.meth-source-role-card p {
  font-size: 0.84375rem;
  line-height: 1.6;
  color: #94A3B8;
  margin: 0 0 14px 0;
}

.meth-source-role-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.8125rem;
  color: #CBD5E1;
}

.meth-source-role-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.5;
}

.meth-source-role-list li i {
  flex-shrink: 0;
  margin-top: 3px;
}

.meth-corpme-attribution {
  margin-top: 20px;
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid #334155;
  border-radius: var(--br-radius-sm, 6px);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.75rem;
  line-height: 1.5;
  color: #94A3B8;
}

.meth-corpme-attribution img {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: #FFFFFF;
  padding: 2px;
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   6. Section 6: Beyond the Location Score (Report Intelligence & Editions)
   -------------------------------------------------------------------------- */
.meth-beyond-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 28px;
}

.meth-context-domain-card {
  background: var(--br-color-bg-pure, #FFFFFF);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-radius: var(--br-radius-md, 8px);
  padding: 20px;
}

.meth-context-domain-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.meth-context-domain-title {
  font-size: 0.96875rem;
  font-weight: 800;
  color: var(--br-color-text-main, #0F172A);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.meth-zero-score-tag {
  font-family: var(--br-font-mono, 'JetBrains Mono', monospace);
  font-size: 0.6875rem;
  font-weight: 700;
  color: #475569;
  background: #F1F5F9;
  border: 1px solid #CBD5E1;
  padding: 2px 7px;
  border-radius: 4px;
  white-space: nowrap;
}

.meth-context-domain-card p {
  font-size: 0.84375rem;
  line-height: 1.6;
  color: var(--br-color-text-secondary, #475569);
  margin: 0;
}

.meth-editions-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  background: var(--br-color-bg-pure, #FFFFFF);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-radius: var(--br-radius-md, 8px);
  padding: 22px 24px;
}

.meth-edition-box h3 {
  font-size: 1rem;
  font-weight: 800;
  color: var(--br-color-text-main, #0F172A);
  margin: 0 0 6px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.meth-edition-box p {
  font-size: 0.84375rem;
  line-height: 1.6;
  color: var(--br-color-text-secondary, #475569);
  margin: 0;
}

/* --------------------------------------------------------------------------
   7. Section 7: Data Freshness & Geographic Coverage
   -------------------------------------------------------------------------- */
.meth-freshness-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 28px;
}

.meth-freshness-step {
  background: var(--br-color-bg-subtle, #F8FAFC);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-radius: var(--br-radius-md, 8px);
  padding: 20px 22px;
  position: relative;
}

.meth-step-num {
  font-family: var(--br-font-mono, 'JetBrains Mono', monospace);
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--br-color-brand-accent, #2563EB);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 6px;
}

.meth-freshness-step h3 {
  font-size: 1rem;
  font-weight: 800;
  color: var(--br-color-text-main, #0F172A);
  margin: 0 0 8px 0;
}

.meth-freshness-step p {
  font-size: 0.84375rem;
  line-height: 1.6;
  color: var(--br-color-text-secondary, #475569);
  margin: 0;
}

.meth-domain-table-wrap {
  background: var(--br-color-bg-pure, #FFFFFF);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-radius: var(--br-radius-md, 8px);
  overflow-x: auto;
}

.meth-domain-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.84375rem;
  text-align: left;
}

.meth-domain-table th {
  background: var(--br-color-bg-subtle, #F8FAFC);
  color: var(--br-color-text-main, #0F172A);
  font-weight: 800;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 13px 16px;
  border-bottom: 1px solid var(--br-color-border-light, #E2E8F0);
}

.meth-domain-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--br-color-border-light, #E2E8F0);
  color: var(--br-color-text-secondary, #475569);
  vertical-align: top;
  line-height: 1.5;
}

.meth-domain-table tr:last-child td {
  border-bottom: none;
}

.meth-domain-table td strong {
  color: var(--br-color-text-main, #0F172A);
  font-weight: 700;
}

.meth-mono-cell {
  font-family: var(--br-font-mono, 'JetBrains Mono', monospace);
  font-size: 0.78125rem;
  color: var(--br-color-text-main, #0F172A);
  white-space: nowrap;
}

/* --------------------------------------------------------------------------
   8. Section 8: Limitations & Responsible Interpretation
   -------------------------------------------------------------------------- */
.meth-limits-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-bottom: 24px;
}

.meth-limit-card {
  background: var(--br-color-bg-pure, #FFFFFF);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-radius: var(--br-radius-md, 8px);
  padding: 20px 22px;
}

.meth-limit-card h3 {
  font-size: 0.96875rem;
  font-weight: 800;
  color: var(--br-color-text-main, #0F172A);
  margin: 0 0 8px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.meth-limit-card p {
  font-size: 0.84375rem;
  line-height: 1.6;
  color: var(--br-color-text-secondary, #475569);
  margin: 0;
}

.meth-zero-fab-banner {
  background: var(--br-color-bg-pure, #FFFFFF);
  border: 1px solid #CBD5E1;
  border-left: 4px solid var(--br-color-brand-accent, #2563EB);
  border-radius: var(--br-radius-md, 8px);
  padding: 20px 24px;
}

.meth-zero-fab-banner h3 {
  font-size: 1rem;
  font-weight: 800;
  color: var(--br-color-text-main, #0F172A);
  margin: 0 0 6px 0;
}

.meth-zero-fab-banner p {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--br-color-text-secondary, #475569);
  margin: 0;
}

/* --------------------------------------------------------------------------
   9. Section 9: Closing Section
   -------------------------------------------------------------------------- */
.meth-closing-section {
  padding: 56px 0 68px;
  background: var(--br-color-bg-pure, #FFFFFF);
}

.meth-closing-box {
  background: var(--br-color-bg-subtle, #F8FAFC);
  border: 1px solid var(--br-color-border-light, #E2E8F0);
  border-radius: var(--br-radius-lg, 10px);
  padding: 32px 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.meth-closing-copy {
  max-width: 640px;
}

.meth-closing-copy h2 {
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--br-color-text-main, #0F172A);
  margin: 0 0 10px 0;
  letter-spacing: -0.02em;
}

.meth-closing-copy p {
  font-size: 0.90625rem;
  line-height: 1.65;
  color: var(--br-color-text-secondary, #475569);
  margin: 0;
}

.meth-closing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  flex-shrink: 0;
}

.meth-closing-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 700;
  padding: 11px 18px;
  border-radius: var(--br-radius-sm, 6px);
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.meth-closing-link--primary {
  background: var(--br-color-brand-accent, #2563EB);
  color: #FFFFFF;
}

.meth-closing-link--primary:hover {
  background: var(--br-color-brand-accent-hover, #1D4ED8);
  color: #FFFFFF;
}

.meth-closing-link--secondary {
  background: var(--br-color-bg-pure, #FFFFFF);
  color: var(--br-color-text-main, #0F172A);
  border: 1px solid var(--br-color-border-medium, #CBD5E1);
}

.meth-closing-link--secondary:hover {
  border-color: var(--br-color-brand-accent, #2563EB);
  color: var(--br-color-brand-accent, #2563EB);
}

/* Focus Accessibility */
.meth-dim-tab:focus-visible,
.meth-mode-btn:focus-visible,
.meth-grade-band-btn:focus-visible,
.meth-jump-link:focus-visible,
.meth-closing-link:focus-visible,
.meth-dim-node:focus-visible {
  outline: 2px solid var(--br-color-brand-accent, #2563EB);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   Responsive Design (1024px, 768px, 480px, 375px)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .meth-hero-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .meth-dim-explorer {
    grid-template-columns: 1fr;
    padding: 22px;
  }
  .meth-dim-svg-wrap {
    max-width: 340px;
  }
  .meth-routing-stage {
    grid-template-columns: 1fr;
  }
  .meth-grade-bar-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .meth-beyond-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .meth-container {
    padding: 0 16px;
  }
  .meth-hero {
    padding: 32px 0 28px;
  }
  .meth-hero-title {
    font-size: 1.875rem;
  }
  .meth-hero-lead {
    font-size: 0.96875rem;
  }
  .meth-section {
    padding: 44px 0;
  }
  .meth-sec-title {
    font-size: 1.4375rem;
  }
  .meth-dim-inspector-grid,
  .meth-dim-inspector-meta,
  .meth-routing-principles,
  .meth-two-col,
  .meth-sources-split-grid,
  .meth-beyond-grid,
  .meth-editions-compare,
  .meth-freshness-steps,
  .meth-limits-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .meth-grade-bar-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .meth-grade-detail-panel {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .meth-closing-box {
    flex-direction: column;
    align-items: flex-start;
    padding: 24px 20px;
    gap: 20px;
  }
}

@media (max-width: 480px) {
  .meth-hero-title {
    font-size: 1.625rem;
  }
  .meth-dim-explorer,
  .meth-routing-shell,
  .meth-grade-spectrum-card {
    padding: 16px;
  }
  .meth-dim-inspector {
    padding: 16px;
  }
  .meth-mode-switch {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }
  .meth-mode-btn {
    padding: 8px 10px;
    font-size: 0.78125rem;
    text-align: center;
  }
}