/* ══════════════════════════════════════════════════════════════════════
   Causes Amplify Introductory Presentation — Refinements & Layout System
   Enforces Apple HIG Tokens, Persistent Rail, and Pixel Fidelity
   ══════════════════════════════════════════════════════════════════════ */

:root {
  --review-body-leading: 1.55;
  --causes-indigo: #2e338c;
  --causes-red: #ed2224;
  --causes-yellow: #f2c710;
  --causes-green: #117a3d;
}

/* ── Global Viewport & Reset ── */
html, body {
  overflow-x: hidden !important;
  max-width: 100vw;
}

/* ── 1. Header (Causes Band & Centered Colophon matching Case Study Model) ── */
.doc-crown {
  width: 100% !important;
  height: 5px !important;
  background: var(--causes-brand-band, var(--causes-signature-band, linear-gradient(90deg, #2e338c 0%, #2e338c 25%, #ed2224 25%, #ed2224 50%, #f2c710 50%, #f2c710 75%, #117a3d 75%, #117a3d 100%))) !important;
  display: block !important;
}

.doc-colophon {
  display: block !important;
  text-align: center !important;
  padding: 24px 24px 0 !important;
  background: var(--system-background) !important;
  border-bottom: none !important;
}

.doc-colophon-logo {
  height: 42px !important;
  width: auto !important;
  object-fit: contain !important;
  display: block !important;
  margin: 0 auto 12px !important;
}

.doc-colophon-rule {
  width: 100% !important;
  max-width: 1440px !important;
  height: 1px !important;
  background: var(--separator, rgba(60, 60, 67, 0.12)) !important;
  margin: 0 auto !important;
  display: block !important;
}

.doc-colophon-meta {
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  padding: 10px 24px !important;
  max-width: 1440px !important;
  margin: 0 auto !important;
  gap: 0 !important;
  border: none !important;
}

.doc-meta-label {
  font-size: 11px !important;
  font-weight: 600 !important;
  letter-spacing: 0.08em !important;
  text-transform: uppercase !important;
  color: var(--tertiary-label, #94a3b8) !important;
}

.doc-meta-dot {
  font-size: 11px !important;
  color: var(--quaternary-label, #cbd5e1) !important;
  padding: 0 8px !important;
}

/* ── 2. Primary Shell & Persistent Left Rail ── */
.case-study-shell {
  position: relative !important;
  max-width: 1440px !important;
  margin: 0 auto !important;
  padding: 0 40px !important;
}

@media (min-width: 1101px) {
  .case-study-shell {
    display: block !important; /* Block layout with fixed aside + margin on main */
  }

  /* Pinned / Persistent Nav Rail */
  .kinetic-rail-aside {
    position: fixed !important;
    top: 50% !important;
    transform: translateY(-50%) !important;
    left: max(36px, calc(50vw - 720px + 40px)) !important;
    width: 160px !important;
    z-index: 150 !important;
    display: block !important;
    padding-top: 0 !important;
  }

  .case-study-content {
    margin-left: 200px !important;
    width: calc(100% - 200px) !important;
    max-width: 1200px !important;
  }
}

@media (max-width: 1100px) {
  .kinetic-rail-aside {
    display: none !important;
  }
  .case-study-content {
    margin-left: 0 !important;
    width: 100% !important;
    padding-top: 16px !important;
  }
  .mobile-chapter-rail {
    display: flex !important;
  }
}

/* ── Spectrum Track & Aperture Cursor (Animated & Colorful HIG Spec) ── */
.spectrum-rail {
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  padding: 0 !important;
  display: block !important;
}

.spectrum-track-container {
  position: relative !important;
  padding: 4px 0 4px 26px !important;
}

.spectrum-spine {
  position: absolute !important;
  left: 7px !important;
  top: 6px !important;
  bottom: 6px !important;
  width: 2.5px !important;
  background: linear-gradient(
    180deg,
    #2e338c 0%,
    #2e338c 18%,
    #ed2224 36%,
    #f2c710 54%,
    #117a3d 72%,
    #ed2224 86%,
    #117a3d 100%
  ) !important;
  opacity: 0.50 !important;
  border-radius: var(--radius-full) !important;
  transition: opacity 0.3s ease !important;
}

.aperture-cursor {
  position: absolute !important;
  left: 5.5px !important;
  top: 0 !important;
  width: 5.5px !important;
  height: 34px !important;
  border-radius: var(--radius-full) !important;
  background-color: var(--causes-indigo);
  box-shadow: 0 0 16px rgba(46, 51, 140, 0.55), 0 0 6px rgba(46, 51, 140, 0.40);
  transition: transform 0.38s cubic-bezier(0.32, 0.72, 0, 1),
              background-color 0.35s cubic-bezier(0.32, 0.72, 0, 1),
              box-shadow 0.35s cubic-bezier(0.32, 0.72, 0, 1) !important;
  will-change: transform, background-color, box-shadow !important;
  z-index: 2 !important;
  pointer-events: none !important;
}

.spectrum-nav-list {
  list-style: none !important;
  margin: 0 !important;
  padding: 0 !important;
  display: flex !important;
  flex-direction: column !important;
  gap: 24px !important; /* ~44px distance center-to-center between items */
}

.spectrum-nav-item {
  position: relative !important;
}

.spectrum-nav-link {
  display: flex !important;
  align-items: center !important;
  text-decoration: none !important;
  padding: 2px 0 !important;
  min-height: 28px !important;
  color: #94a3b8 !important;
  transition: color 0.25s ease, transform 0.35s cubic-bezier(0.32, 0.72, 0, 1) !important;
  transform: translateX(0) !important;
}

.spectrum-nav-link:hover {
  color: #475569 !important;
  transform: translateX(3px) !important;
}

.spectrum-nav-link.active {
  transform: translateX(6px) !important;
}

.spectrum-link-title {
  font-size: 17px !important;
  font-weight: 450 !important;
  line-height: 1.35 !important;
  letter-spacing: -0.010em !important;
  color: inherit !important;
  transition: font-weight 0.25s ease, color 0.25s ease !important;
  display: block !important;
}

.spectrum-nav-link.active .spectrum-link-title {
  font-weight: 700 !important;
}

/* Color highlights per section matching Case Study model */
.spectrum-nav-link[data-color="#2e338c"].active,
.spectrum-nav-link[data-color="#2e338c"].active .spectrum-link-title {
  color: #2e338c !important;
}

.spectrum-nav-link[data-color="#ed2224"].active,
.spectrum-nav-link[data-color="#ed2224"].active .spectrum-link-title {
  color: #ed2224 !important;
}

.spectrum-nav-link[data-color="#f2c710"].active,
.spectrum-nav-link[data-color="#f2c710"].active .spectrum-link-title {
  color: #c28800 !important; /* Amber-gold for high-contrast on light canvas */
}

.spectrum-nav-link[data-color="#117a3d"].active,
.spectrum-nav-link[data-color="#117a3d"].active .spectrum-link-title {
  color: #117a3d !important;
}

/* ── 3. Hero Section (Two-Column Layout matching Image 1) ── */
@media (min-width: 1101px) {
  .hero {
    display: grid !important;
    grid-template-columns: minmax(0, 1fr) 280px !important;
    gap: 56px !important;
    align-items: start !important;
    padding: 16px 0 0 !important;
    max-width: 100% !important;
    margin: 0 !important;
    text-align: left !important;
  }
}

.hero-content {
  display: flex !important;
  flex-direction: column !important;
}

.hero-kicker {
  font-size: 12px !important;
  font-weight: 700 !important;
  letter-spacing: 0.08em !important;
  text-transform: uppercase !important;
  color: var(--causes-indigo) !important;
  margin-bottom: 12px !important;
}

.hero-title {
  font-size: clamp(34px, 3.6vw, 44px) !important;
  font-weight: 800 !important;
  letter-spacing: -0.025em !important;
  line-height: 1.15 !important;
  color: #0f172a !important;
  margin-bottom: 16px !important;
  text-wrap: balance !important;
}

.hero-subtitle {
  font-size: 17px !important;
  line-height: 1.55 !important;
  color: #64748b !important;
  max-width: 620px !important;
  margin-bottom: 24px !important;
}

/* 4-Item KPI Strip */
.hero-kpi-strip {
  display: grid !important;
  grid-template-columns: repeat(4, 1fr) !important;
  gap: 16px !important;
  padding-top: 20px !important;
  margin-top: 20px !important;
  border-top: 1px solid rgba(60, 60, 67, 0.12) !important;
}

.hero-kpi-strip .kpi-item {
  display: flex !important;
  flex-direction: column !important;
}

.hero-kpi-strip .kpi-value {
  font-size: 20px !important;
  font-weight: 700 !important;
  color: #0f172a !important;
  line-height: 1.2 !important;
}

.hero-kpi-strip .kpi-label {
  font-size: 10.5px !important;
  font-weight: 700 !important;
  letter-spacing: 0.06em !important;
  text-transform: uppercase !important;
  color: #64748b !important;
  margin-top: 4px !important;
  line-height: 1.3 !important;
}

/* Presenter Note Box */
.presenter-note-box {
  margin-top: 24px !important;
  background: rgba(46, 51, 140, 0.04) !important;
  border: 1px dashed rgba(46, 51, 140, 0.25) !important;
  border-radius: 8px !important;
  padding: 12px 18px !important;
}

.presenter-note-header {
  min-height: 44px !important;
  cursor: pointer !important;
  display: flex !important;
  align-items: center !important;
  user-select: none !important;
}

.presenter-note-tag {
  display: inline-flex !important;
  align-items: center !important;
  gap: 8px !important;
  font-size: 11px !important;
  font-weight: 700 !important;
  letter-spacing: 0.06em !important;
  text-transform: uppercase !important;
  color: var(--causes-indigo) !important;
}

.presenter-note-header > span:last-child {
  display: none !important;
}

.presenter-note-box .presenter-note-content {
  margin-top: 10px !important;
  font-size: 13px !important;
  line-height: 1.55 !important;
  color: #64748b !important;
  border-top: 1px solid rgba(46, 51, 140, 0.12) !important;
  padding-top: 10px !important;
}

.presenter-note-box:not([open]) .presenter-note-content {
  display: none !important;
}

/* ── 4. Right Column: Three Comparison Cards (matching Image 1) ── */
.hero-fanned-container {
  width: 100% !important;
  max-width: 370px !important;
  margin: 0 !important;
  padding: 0 !important;
  overflow: visible !important;
}

.hero-fanned-cards {
  display: flex !important;
  flex-direction: column !important;
  gap: 14px !important;
  height: auto !important;
}

.hero-fanned-cards .creator-portrait-card,
.hero-fanned-cards:hover .creator-portrait-card {
  position: static !important;
  width: 100% !important;
  height: auto !important;
  min-height: 0 !important;
  transform: none !important;
  cursor: default !important;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03) !important;
  border-radius: 14px !important;
  border: 1px solid rgba(0, 0, 0, 0.06) !important;
  background: #ffffff !important;
  display: grid !important;
  grid-template-columns: 44% 56% !important;
  overflow: hidden !important;
}

.hero-fanned-cards .creator-card-visual {
  background: #f8fafc !important;
  padding: 14px 16px !important;
  display: flex !important;
  flex-direction: column !important;
  justify-content: center !important;
  border-right: 1px solid rgba(0, 0, 0, 0.04) !important;
}

.example-receipt {
  width: 100% !important;
  line-height: 1.4 !important;
}

.example-label {
  font-size: 11px !important;
  color: #94a3b8 !important;
  font-weight: 500 !important;
  display: block !important;
  margin-bottom: 2px !important;
}

.example-receipt p {
  font-size: 13.5px !important;
  font-weight: 700 !important;
  color: #0f172a !important;
  margin: 2px 0 8px !important;
  line-height: 1.3 !important;
}

.receipt-row {
  display: flex !important;
  justify-content: space-between !important;
  align-items: baseline !important;
  font-size: 12px !important;
  color: #64748b !important;
  padding: 3px 0 !important;
}

.receipt-row + .receipt-row {
  border-top: 1px solid rgba(0, 0, 0, 0.05) !important;
}

.receipt-row strong {
  font-size: 15px !important;
  font-weight: 700 !important;
  color: #0f172a !important;
  font-variant-numeric: tabular-nums !important;
}

.creator-card-footer {
  padding: 14px 16px !important;
  display: flex !important;
  flex-direction: column !important;
  justify-content: center !important;
  background: #ffffff !important;
  min-width: 0 !important;
}

.creator-card-author {
  font-size: 16px !important;
  font-weight: 700 !important;
  color: #0f172a !important;
  line-height: 1.25 !important;
}

.creator-card-channel {
  font-size: 12px !important;
  color: #64748b !important;
  margin: 2px 0 10px !important;
}

.creator-card-series {
  font-size: 11.5px !important;
  font-weight: 600 !important;
  padding: 4px 12px !important;
  border-radius: var(--radius-full) !important;
  width: fit-content !important;
  display: inline-block !important;
  margin: 0 !important;
  line-height: 1.3 !important;
  white-space: normal !important;
}

/* Card Badge Tinting */
.card-1 .creator-card-series {
  background: rgba(46, 51, 140, 0.08) !important;
  color: var(--causes-indigo) !important;
}

.card-2 .creator-card-series {
  background: rgba(237, 34, 36, 0.08) !important;
  color: var(--causes-red) !important;
}

.card-3 .creator-card-series {
  background: rgba(17, 122, 61, 0.08) !important;
  color: var(--causes-green) !important;
}

.hero-fanned-caption {
  font-size: 12px !important;
  font-style: italic !important;
  color: #94a3b8 !important;
  text-align: center !important;
  margin-top: 14px !important;
}

/* ── 5. Intermission Dash Indicator (— — — — matching Image 1) ── */
.chapter-rule {
  display: flex !important;
  justify-content: center !important;
  align-items: center !important;
  gap: 8px !important;
  margin: 48px auto 36px !important;
  height: auto !important;
  background: transparent !important;
  border: none !important;
}

.chapter-rule-segment {
  width: 20px !important;
  height: 3.5px !important;
  border-radius: var(--radius-full) !important;
  display: block !important;
}

.chapter-rule-segment.indigo { background: var(--causes-indigo) !important; }
.chapter-rule-segment.red { background: var(--causes-red) !important; }
.chapter-rule-segment.yellow { background: var(--causes-yellow) !important; }
.chapter-rule-segment.green { background: var(--causes-green) !important; }

/* ── 6. Moment 2 & Beyond Content Refinements ── */
.bento-contrast-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5);
  margin-top: var(--space-5);
}

.bento-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  transition: transform var(--spring-fast), box-shadow var(--spring-fast);
}

.bento-card-traditional {
  background: var(--secondary-system-background);
  border: 1px solid var(--separator);
}

.bento-card-cluster {
  background: var(--system-background);
  border: 1.5px solid rgba(46, 51, 140, 0.28);
  box-shadow: 0 4px 20px -2px rgba(46, 51, 140, 0.08);
}

.bento-watermark {
  position: absolute;
  right: -32px;
  bottom: -36px;
  width: 290px;
  height: 290px;
  pointer-events: none;
  user-select: none;
  z-index: 0;
  transition: opacity 0.3s ease;
}

.bento-watermark-traditional {
  color: var(--label);
  opacity: 0.045;
}

.bento-watermark-cluster {
  color: var(--causes-indigo);
  opacity: 0.13;
}

.bento-card-inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.bento-card-header {
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--separator);
}

.bento-card-cluster .bento-card-header {
  border-bottom-color: rgba(46, 51, 140, 0.14);
}

.bento-card-eyebrow {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-1);
}

.bento-card-traditional .bento-card-eyebrow {
  color: var(--secondary-label);
}

.bento-card-cluster .bento-card-eyebrow {
  color: var(--causes-indigo);
}

.bento-card-title {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 var(--space-1) 0;
}

.bento-card-traditional .bento-card-title {
  color: var(--label);
}

.bento-card-cluster .bento-card-title {
  color: var(--causes-indigo);
}

.bento-card-subtitle {
  font-size: var(--type-footnote);
  color: var(--secondary-label);
  line-height: var(--review-body-leading);
  margin: 0;
}

.bento-features-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  flex-grow: 1;
}

.bento-feature-item {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.bento-feature-dimension {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--secondary-label);
}

.bento-card-cluster .bento-feature-dimension {
  color: var(--causes-indigo);
  opacity: 0.85;
}

.bento-feature-val {
  font-size: var(--type-callout);
  line-height: 1.45;
  color: var(--label);
}

.bento-card-cluster .bento-feature-val {
  font-weight: 600;
  color: var(--label);
}

.bento-distinction-banner {
  margin-top: var(--space-5);
  padding: var(--space-4) var(--space-5);
  background: var(--secondary-system-background);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--causes-indigo);
  font-size: var(--type-callout);
  line-height: var(--review-body-leading);
  color: var(--label);
}

/* ── Moment 3 Two Architectural Schematics (Network Comparison) ── */
.network-schematics-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5);
  margin-top: var(--space-5);
}

.schematic-card {
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
}

.schematic-card-traditional {
  background: var(--secondary-system-background);
  border: 1px solid var(--separator);
}

.schematic-card-cluster {
  background: var(--system-background);
  border: 1.5px solid rgba(46, 51, 140, 0.28);
  box-shadow: 0 4px 20px -2px rgba(46, 51, 140, 0.08);
}

.schematic-header {
  margin-bottom: var(--space-4);
}

.schematic-eyebrow {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 4px;
}

.schematic-card-traditional .schematic-eyebrow {
  color: var(--secondary-label);
}

.schematic-card-cluster .schematic-eyebrow {
  color: var(--causes-indigo);
}

.schematic-title {
  font-size: 19px;
  font-weight: 700;
  margin: 0 0 4px 0;
  line-height: 1.25;
}

.schematic-card-traditional .schematic-title {
  color: var(--label);
}

.schematic-card-cluster .schematic-title {
  color: var(--causes-indigo);
}

.schematic-stage {
  background: var(--system-background);
  border-radius: var(--radius-md);
  padding: 12px;
  border: 1px solid rgba(0, 0, 0, 0.05);
  display: flex;
  justify-content: center;
  align-items: center;
}

.schematic-stage svg {
  width: 100%;
  height: auto;
  display: block;
}

.schematic-label-box {
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--separator);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.schematic-card-cluster .schematic-label-box {
  border-top-color: rgba(46, 51, 140, 0.14);
}

.schematic-headline {
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--label);
  margin: 0 0 6px 0;
}

.schematic-card-cluster .schematic-headline {
  color: var(--causes-indigo);
}

.schematic-desc {
  font-size: 13px;
  color: var(--secondary-label);
  line-height: 1.5;
  margin: 0;
}

.schematics-synthesis-strip {
  margin-top: var(--space-5);
  padding: var(--space-4) var(--space-5);
  background: var(--secondary-system-background);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--causes-indigo);
  font-size: 14px;
  line-height: 1.5;
  color: var(--label);
}

.mirror-row {
  display: grid;
  grid-template-columns: minmax(100px, 0.7fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--space-4);
  padding: var(--space-4);
  border-bottom: 1px solid var(--separator);
}
.mirror-row:last-child { border-bottom: none; }
.mirror-row > span { min-width: 0; font-size: var(--type-footnote); line-height: var(--review-body-leading); }
.mirror-row-header { background: var(--secondary-system-background); font-weight: 600; }
.row-cell-dimension { color: var(--label); font-weight: 600; }
.row-cell-cluster { color: var(--causes-indigo); }
.row-cell-traditional { color: var(--label); }
.example-note { font-size: var(--type-footnote); color: var(--secondary-label); line-height: var(--review-body-leading); margin: var(--space-3) 0; }
.shared-learning-strip { margin-top: var(--space-4); padding: var(--space-4); background: var(--secondary-system-background); border-radius: var(--radius-sm); font-size: var(--type-callout); line-height: var(--review-body-leading); color: var(--label); }

.affordability-story { display: block; }
.affordability-storyboard { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-4); }
.affordability-storyboard .storyboard-frame { padding: var(--space-5); border-radius: var(--radius-md); text-align: left; }
.affordability-storyboard .storyboard-frame-title { font-size: var(--type-body); margin: var(--space-3) 0; line-height: var(--line-height-heading); }
.affordability-storyboard .storyboard-frame-desc { font-size: var(--type-callout); line-height: var(--review-body-leading); }
.reference-video-link { margin-top: var(--space-5); }
.anatomy-modal-content { display: block; }
.modal-video-card { max-width: 360px; margin: 0 auto; }
.anatomy-modal-desc, .sim-modal-desc { max-width: 65ch; }

.safari-chrome-bar { flex-wrap: wrap; gap: var(--space-2); }
.safari-address-field { min-width: 0; overflow-wrap: anywhere; }
.safari-chrome-bar > a { flex-shrink: 0; min-height: var(--touch-target-min); display: inline-flex; align-items: center; font-size: var(--type-footnote); }
.scope-summary-header { gap: var(--space-4); flex-wrap: wrap; }
.scope-summary-header button, .reference-video-link button, .closing-invitation button { min-height: var(--touch-target-min); }
.closing-invitation { background: var(--secondary-system-background) !important; color: var(--label) !important; }
.closing-invitation p { color: var(--secondary-label) !important; }

button, summary, a { -webkit-tap-highlight-color: transparent; }
button:focus-visible, summary:focus-visible, a:focus-visible { outline: 2px solid var(--system-accent); outline-offset: var(--space-1); }
[hidden] { display: none !important; }

/* The companion article */
.return-bar { background: var(--secondary-system-background); color: var(--label); flex-wrap: wrap; gap: var(--space-3); padding: var(--space-3) var(--space-5); }
.return-bar > div { flex-wrap: wrap; }
.return-bar a { color: var(--system-accent); min-height: var(--touch-target-min); }
.return-pill { background: var(--system-accent-subtle); color: var(--system-accent); border-radius: var(--radius-full); }
.causes-header { flex-wrap: wrap; gap: var(--space-3); padding: var(--space-4) var(--space-6); }
.causes-nav { flex-wrap: wrap; gap: var(--space-5); }
.causes-nav a { min-height: var(--touch-target-min); min-width: var(--touch-target-min); justify-content: center; display: inline-flex; align-items: center; }
.article-meta { flex-wrap: wrap; gap: var(--space-3); }
.article-title { text-wrap: balance; }
.poll-card, .partner-action-box { border-radius: var(--radius-md); background: var(--secondary-system-background); }
.poll-option-btn, .partner-btn { min-height: var(--touch-target-min); font-size: var(--type-callout); border-radius: var(--radius-sm); transition: var(--spring-fast); }
.sample-worksheet { margin: var(--space-4) 0; max-width: 360px; }
.sample-worksheet > div { display: flex; justify-content: space-between; gap: var(--space-4); padding: var(--space-3) 0; border-bottom: 1px solid var(--separator); }
.sample-worksheet dd { font-weight: 600; font-variant-numeric: tabular-nums; }
#sampleWorksheet { margin-top: var(--space-5); }

/* ── Two-Tier Conversion Architecture (Chapter 6 / Act 5) ── */
.act6-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--system-accent);
  background: var(--system-accent-subtle);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
  border: 1px solid rgba(59, 47, 201, 0.16);
}

.conversion-engine-container {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 48px minmax(0, 1.25fr);
  align-items: stretch;
  gap: 16px;
  margin-bottom: 28px;
  margin-top: 20px;
  position: relative;
}

.conversion-tier-card {
  background: var(--secondary-system-background);
  border: 1px solid var(--separator);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 18px;
  transition: var(--spring-fast);
}

/* Stage 1: The High-Velocity Creator Engine */
.conversion-tier-card.tier-source {
  border-top: 3.5px solid var(--system-accent);
  background: linear-gradient(180deg, rgba(59, 47, 201, 0.05) 0%, var(--secondary-system-background) 100%);
  box-shadow: 0 4px 16px rgba(59, 47, 201, 0.06);
}

/* Stage 2: The Institutional Conversion Anchor */
.conversion-tier-card.tier-destination {
  border-top: 3.5px solid var(--label);
  background: var(--secondary-system-background);
}

.tier-card-top {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.conversion-tier-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  margin-bottom: 4px;
  width: fit-content;
}

.conversion-tier-badge.tier-badge--engine {
  color: var(--system-accent);
  background: var(--system-accent-subtle);
  border: 1px solid rgba(59, 47, 201, 0.24);
}

.conversion-tier-badge.tier-badge--anchor {
  color: var(--secondary-label);
  background: rgba(15, 23, 42, 0.06);
  border: 1px solid var(--separator);
}

.conversion-tier-title {
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: -0.012em;
  color: var(--label);
  margin: 0 0 4px;
  line-height: 1.3;
}

.conversion-tier-desc {
  font-size: 13px;
  color: var(--secondary-label);
  line-height: 1.5;
  margin: 0;
}

.conversion-tier-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--separator);
}

.tier-stat-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.tier-stat-num {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--label);
  line-height: 1.1;
}

.tier-source .tier-stat-num {
  color: var(--system-accent);
}

.tier-stat-lbl {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--tertiary-label);
}

.tier-source .tier-stat-lbl {
  color: var(--secondary-label);
  font-weight: 700;
}

.tier-engine-feature {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-weight: 600;
  color: var(--system-accent);
  background: rgba(59, 47, 201, 0.08);
  border: 1px solid rgba(59, 47, 201, 0.16);
  padding: 5px 10px;
  border-radius: var(--radius-full);
  margin-top: 4px;
  width: fit-content;
}

.engine-feature-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--system-accent);
}

/* Center Routing Pivot */
.conversion-pivot {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.conversion-pivot-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--system-accent);
  border: 2px solid var(--system-background);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(59, 47, 201, 0.35);
  transition: var(--spring-fast);
  position: relative;
}

.conversion-pivot-pill .pivot-text {
  display: none;
}

/* In-situ subcards within Tier 2 */
.insitu-integration-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--separator);
}

.insitu-subcard {
  background: var(--system-background);
  border: 1px solid var(--separator);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.insitu-subcard.insitu-subcard--client {
  border-color: rgba(59, 47, 201, 0.28);
  background: var(--system-accent-subtle);
}

.insitu-subcard-header {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: -0.005em;
  color: var(--label);
}

.insitu-subcard--client .insitu-subcard-header {
  color: var(--system-accent);
}

.insitu-subcard-desc {
  font-size: 11px;
  color: var(--secondary-label);
  line-height: 1.4;
  margin: 0;
}

/* Safari Browser Frame */
.browser-showcase-frame {
  border-radius: var(--radius-xl);
  border: 1px solid var(--separator);
  background: var(--system-background);
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
  overflow: hidden;
  transition: var(--spring);
  position: relative;
}

.browser-showcase-frame:hover {
  transform: translateY(-2px);
  box-shadow: 0 24px 60px rgba(59, 47, 201, 0.14);
  border-color: rgba(59, 47, 201, 0.35);
}

.browser-topbar {
  height: 46px;
  background: var(--secondary-system-background);
  border-bottom: 1px solid var(--separator);
  display: flex;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
}

.browser-dots {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.browser-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}
.browser-dot.red { background: #ff5f56; border: 1px solid rgba(0,0,0,0.1); }
.browser-dot.yellow { background: #ffbd2e; border: 1px solid rgba(0,0,0,0.1); }
.browser-dot.green { background: #27c93f; border: 1px solid rgba(0,0,0,0.1); }

.browser-address-bar {
  flex: 1;
  height: 28px;
  background: var(--system-background);
  border-radius: var(--radius-sm);
  border: 1px solid var(--separator);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 12px;
  font-weight: 500;
  color: var(--secondary-label);
  box-shadow: 0 1px 2px rgba(0,0,0,0.03) inset;
  max-width: 480px;
  margin: 0 auto;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.browser-address-bar span {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.browser-open-link {
  font-size: 11px;
  color: var(--system-accent);
  text-decoration: none;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
  padding: 4px 8px;
  border-radius: var(--radius-xs);
  transition: var(--spring-fast);
}

.browser-open-link:hover {
  background: var(--system-accent-subtle);
}

.browser-preview-wrap {
  width: 100%;
  height: 620px;
  border: none;
  background: #ffffff;
  display: block;
}

/* ── 7. Responsive Breakpoints ── */
@media (max-width: 768px) {
  .hero-fanned-container { max-width: 100% !important; }
  .bento-contrast-grid { grid-template-columns: 1fr; gap: var(--space-4); }
  .bento-card { padding: var(--space-5); }
  .bento-watermark { width: 210px; height: 210px; right: -20px; bottom: -24px; }
  .network-schematics-grid { grid-template-columns: 1fr; gap: var(--space-4); }
  .schematic-card { padding: var(--space-4); }
  .mirror-row { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-3); padding: var(--space-3); }
  .mirror-row:not(.mirror-row-header) .row-cell-dimension { grid-column: 1 / -1; }
  .mirror-row-header .row-cell-dimension { display: none; }
  .mirror-row-header > span { font-size: var(--type-caption); }
  .affordability-storyboard { grid-template-columns: 1fr; }
  .conversion-engine-container { grid-template-columns: 1fr; gap: 14px; margin-bottom: 20px; }
  .conversion-pivot { margin: -2px auto; transform: rotate(90deg); }
  .insitu-integration-grid { grid-template-columns: 1fr; gap: 8px; }
  .browser-address-bar { max-width: 100%; font-size: 11px; }
  .browser-preview-wrap { height: 600px; }
  .partner-features { grid-template-columns: 1fr; }
  .article-wrap { padding: var(--space-6) var(--space-5) var(--space-12); }
  .article-deck { font-size: var(--type-body); }
  .return-bar > div { gap: var(--space-2) !important; }
  .hero-kpi-strip { grid-template-columns: repeat(2, 1fr) !important; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto !important; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* Fix mockup tags wrapping */
.browser-preview-wrap span.bg-gray-100 { white-space: nowrap; }
.browser-preview-wrap .flex.items-center.gap-2 { flex-wrap: wrap; }