/**
 * Prima AI Solution Map — Style Guide
 * Theme: Ink and Paper (default production theme)
 * Deloitte-style insight document translated to interactive web
 */

@import url("https://fonts.googleapis.com/css2?family=Source+Serif+4:opsz,wght@8..60,500;8..60,600&family=Source+Sans+3:wght@400;500;600&display=swap");

:root {
  /* Color tokens */
  --color-bg: #f9f7f4;
  --color-surface: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #4a4a4a;
  --color-text-subtle: #6b6b6b;
  --color-accent: #0066a1;
  --color-accent-hover: #004d7a;
  --color-border: #d4cfc6;
  --color-rule: #1a1a1a;
  --color-success: #166534;
  --color-success-bg: #ecfdf5;
  --color-warning: #b45309;
  --color-warning-bg: #fffbeb;
  --color-unknown: #6b7280;
  --color-unknown-bg: #f3f4f6;
  --color-supporting: #0066a1;
  --color-invalidating: #9a3412;

  /* Typography */
  --font-serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-sans: "Source Sans 3", system-ui, -apple-system, sans-serif;
  --font-size-xs: 0.6875rem;
  --font-size-sm: 0.8125rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --line-height: 1.7;
  --line-height-tight: 1.25;

  /* Layout */
  --sidebar-width: 280px;
  --chart-panel-width: 442px;
  --header-height: 56px;
  --content-max-width: 720px;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 2.5rem;
  --space-3xl: 4rem;

  /* Components */
  --radius-sm: 2px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --transition: 0.15s ease;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-rule);
  display: flex;
  align-items: center;
  padding: 0 var(--space-xl);
  z-index: 200;
}

.site-header__brand {
  font-family: var(--font-serif);
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-text);
}

.site-header__rule {
  flex: 0 0 80px;
  height: 1px;
  background: var(--color-rule);
  margin: 0 var(--space-lg);
}

.site-header__meta {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
}

.site-header__toggle {
  display: none;
  margin-left: auto;
  background: none;
  border: 1px solid var(--color-border);
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  cursor: pointer;
  border-radius: var(--radius-sm);
}

/* Global jump drawer */
.global-jump-toggle {
  position: fixed;
  right: calc(0.9rem + 10px);
  bottom: 0.9rem;
  z-index: 760;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(10, 22, 40, 0.34);
  color: #fff;
  padding: 0.45rem 0.6rem;
  font-family: var(--font-sans);
  font-size: 0.625rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  opacity: 0.58;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(12px);
  transition: opacity 0.15s ease, background 0.15s ease, border-color 0.15s ease;
}

.global-jump-toggle:hover {
  opacity: 1;
  border-color: rgba(255, 255, 255, 0.38);
  background: rgba(10, 22, 40, 0.62);
}

.global-jump-overlay {
  position: fixed;
  inset: 0;
  z-index: 770;
  background: rgba(10, 22, 40, 0.28);
  backdrop-filter: blur(2px);
}

.global-jump-overlay[hidden] {
  display: none;
}

.global-jump-drawer {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 780;
  width: min(420px, calc(100vw - 2rem));
  height: 100vh;
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  box-shadow: -24px 0 60px rgba(10, 22, 40, 0.22);
  transform: translateX(100%);
  transition: transform 0.22s ease;
  display: flex;
  flex-direction: column;
}

.global-jump-drawer.is-open {
  transform: translateX(0);
}

.global-jump-drawer__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-lg);
  padding: 1.25rem 1.25rem 1rem;
  border-bottom: 1px solid var(--color-border);
}

.global-jump-drawer__eyebrow {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: 0.25rem;
}

.global-jump-drawer__title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  line-height: 1.2;
}

.global-jump-drawer__close {
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text);
  width: 2rem;
  height: 2rem;
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
}

.global-jump-drawer__content {
  overflow-y: auto;
  padding: 1rem 1.25rem 1.5rem;
}

.jump-group + .jump-group {
  margin-top: 1.5rem;
}

.jump-group__title {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-subtle);
  margin-bottom: 0.5rem;
}

.jump-group__links {
  display: grid;
  gap: 0.35rem;
}

.jump-link {
  display: block;
  width: 100%;
  text-align: left;
  border: 1px solid transparent;
  background: #f9f7f4;
  color: var(--color-text);
  padding: 0.65rem 0.75rem;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  line-height: 1.35;
  cursor: pointer;
}

.jump-link:hover {
  border-color: var(--color-accent);
  background: rgba(0, 102, 161, 0.06);
}

.jump-link span {
  display: block;
  color: var(--color-accent);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.15rem;
}

/* Sidebar */
.sidebar {
  position: fixed;
  top: var(--header-height);
  left: 0;
  width: var(--sidebar-width);
  height: calc(100vh - var(--header-height));
  background: var(--color-bg);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  z-index: 150;
  transition: transform var(--transition);
}

.sidebar__title {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-subtle);
  padding: var(--space-lg) var(--space-lg) var(--space-sm);
}

.sidebar__nav {
  list-style: none;
  padding-bottom: var(--space-xl);
}

.sidebar__link {
  display: block;
  padding: 0.5rem var(--space-lg);
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--font-size-sm);
  line-height: 1.4;
  border-left: 3px solid transparent;
  transition: color var(--transition), background var(--transition), border-color var(--transition);
}

.sidebar__link:hover {
  color: var(--color-text);
  background: rgba(0, 0, 0, 0.03);
}

.sidebar__link.is-active {
  color: var(--color-accent);
  font-weight: 600;
  border-left-color: var(--color-accent);
  background: rgba(0, 102, 161, 0.06);
}

.sidebar__link .num {
  color: var(--color-text-subtle);
  font-variant-numeric: tabular-nums;
}

.sidebar__link.is-active .num {
  color: var(--color-accent);
}

/* Main layout — three columns: nav | content | chart */
.app-layout {
  margin-left: var(--sidebar-width);
  margin-right: var(--chart-panel-width);
  margin-top: var(--header-height);
  min-height: calc(100vh - var(--header-height));
}

.main-content {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-xl) var(--space-3xl);
  overflow: visible;
}

/* Chart panel (right) */
.chart-panel {
  position: fixed;
  top: var(--header-height);
  right: 0;
  width: var(--chart-panel-width);
  height: calc(100vh - var(--header-height));
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  overflow-y: auto;
  z-index: 150;
  padding: var(--space-xl) var(--space-lg) var(--space-lg);
}

.chart-panel__chart-wrap {
  position: relative;
  height: 300px;
  margin-bottom: var(--space-lg);
}

.chart-panel__chart-wrap canvas {
  max-height: 300px;
}

.chart-panel__section-label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-subtle);
  margin-bottom: var(--space-sm);
}

.chart-panel__weighted-wrap {
  position: relative;
  height: 260px;
  margin-bottom: var(--space-md);
}

.chart-panel__empty {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding: var(--space-lg);
}

/* Initiative card */
.initiative {
  animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.initiative__eyebrow {
  font-size: var(--font-size-sm);
  color: var(--color-text-subtle);
  margin-bottom: var(--space-xs);
}

.initiative__title {
  font-family: var(--font-serif);
  font-size: var(--font-size-3xl);
  font-weight: 600;
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-md);
}

.initiative__subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.initiative__divider {
  border: none;
  border-top: 1px solid var(--color-rule);
  margin: var(--space-lg) 0 var(--space-xl);
}

/* Meta badges */
.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-md);
}

.meta-row__item {
  color: var(--color-text-muted);
}

.meta-row__item strong {
  color: var(--color-text);
  font-weight: 600;
}

.score-highlight {
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
}

.badge {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
}

.badge--strategic {
  background: var(--color-accent);
  color: #fff;
}

/* Sections */
.section {
  margin-bottom: var(--space-2xl);
}

.section__title {
  font-family: var(--font-serif);
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.section__text {
  color: var(--color-text-muted);
}

/* Evidence — quote cards (Treatment A) */
.evidence-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.quote-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-lg) var(--space-lg) var(--space-md);
  position: relative;
  box-shadow: var(--shadow-sm);
  margin: 0;
}

.quote-card::before {
  content: "\201C";
  position: absolute;
  top: 0.5rem;
  left: 1rem;
  font-family: var(--font-serif);
  font-size: 2.5rem;
  line-height: 1;
  color: var(--color-accent);
  opacity: 0.35;
}

.quote-card--invalidating::before {
  color: var(--color-invalidating);
}

.quote-card__tag {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.quote-card--invalidating .quote-card__tag {
  color: var(--color-invalidating);
}

.quote-card__text {
  font-family: var(--font-serif);
  font-size: var(--font-size-lg);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  padding-left: var(--space-md);
  margin-bottom: var(--space-md);
}

.quote-card__footer {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  font-size: var(--font-size-xs);
  color: var(--color-text-subtle);
}

.quote-card__context {
  font-weight: 600;
  color: var(--color-text-muted);
}

/* Scoring table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
}

.data-table th {
  text-align: left;
  font-weight: 600;
  padding: var(--space-sm) 0;
  border-bottom: 2px solid var(--color-rule);
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text);
}

.data-table th:not(:first-child),
.data-table td:not(:first-child) {
  text-align: right;
}

.data-table td {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  vertical-align: top;
}

.data-table tr:last-child td {
  border-bottom: 2px solid var(--color-rule);
  font-weight: 600;
  color: var(--color-text);
}

.data-table .note-cell {
  text-align: left !important;
  font-size: var(--font-size-xs);
  max-width: 280px;
}

/* Gate results */
.gate-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.gate-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-md);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
  align-items: start;
}

.gate-item__name {
  font-weight: 500;
  color: var(--color-text);
}

.gate-item__notes {
  grid-column: 1 / -1;
  color: var(--color-text-muted);
  font-size: var(--font-size-xs);
  margin-top: calc(var(--space-xs) * -1);
}

.gate-result {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
}

.gate-result--pass {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.gate-result--unknown {
  background: var(--color-unknown-bg);
  color: var(--color-unknown);
}

/* Supporting documents */
.doc-list {
  list-style: none;
}

.doc-list__item {
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
}

.doc-list__item a {
  color: var(--color-accent);
  text-decoration: none;
}

.doc-list__item a:hover {
  text-decoration: underline;
  color: var(--color-accent-hover);
}

.doc-list__type {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.15rem;
}

/* Mermaid panel */
.mermaid-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-lg);
  overflow-x: auto;
}

.mermaid-panel .mermaid {
  display: flex;
  justify-content: center;
}

/* Next action */
.next-action {
  background: var(--color-surface);
  border-left: 3px solid var(--color-accent);
  padding: var(--space-lg);
}

.next-action__label {
  font-size: var(--font-size-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.next-action p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.next-action p:last-child {
  margin-bottom: 0;
}

/* Placeholder state */
.placeholder-card {
  text-align: center;
  padding: var(--space-3xl) var(--space-xl);
  color: var(--color-text-muted);
}

.placeholder-card__title {
  font-family: var(--font-serif);
  font-size: var(--font-size-2xl);
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

/* Footer link */
.style-link {
  margin-top: var(--space-3xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
}

.style-link a {
  color: var(--color-accent);
}

/* Responsive */
@media (max-width: 1200px) {
  :root {
    --chart-panel-width: 0px;
  }

  .chart-panel {
    position: relative;
    top: auto;
    right: auto;
    width: 100%;
    height: auto;
    border-left: none;
    border-bottom: 1px solid var(--color-border);
    margin-top: var(--header-height);
  }

  .app-layout {
    margin-right: 0;
  }

  .chart-panel__chart-wrap {
    height: 240px;
  }
}

@media (max-width: 900px) {
  .site-header__toggle {
    display: block;
  }

  .site-header__rule,
  .site-header__meta {
    display: none;
  }

  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.is-open {
    transform: translateX(0);
    box-shadow: var(--shadow-sm);
  }

  .app-layout {
    margin-left: 0;
  }

  .main-content {
    padding: var(--space-xl) var(--space-lg) var(--space-2xl);
  }

  .initiative__title {
    font-size: var(--font-size-2xl);
  }

  .gate-item {
    grid-template-columns: 1fr;
  }
}

/* ═══════════════════════════════════════════════════════════
   INTRO SEQUENCE — Full-viewport editorial pages
   ═══════════════════════════════════════════════════════════ */

.intro-sequence {
  position: relative;
  z-index: 300;
}

.intro-page {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 4rem 2rem;
}

.intro-page--dark {
  background: #0a1628;
  color: #f0ede8;
}

.intro-page--warm {
  background: var(--color-bg);
  color: var(--color-text);
}

.intro-page--accent {
  background: #002b47;
  color: #f0ede8;
}

.intro-page--light {
  background: #ffffff;
  color: var(--color-text);
}

.intro-inner {
  max-width: 960px;
  width: 100%;
  position: relative;
}

/* Page 1 — The Solution Map */
.intro-hero {
  text-align: center;
}

.intro-hero__kicker {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  opacity: 0.5;
  margin-bottom: 2.5rem;
}

.intro-hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 600;
  line-height: 1.08;
  margin-bottom: 2rem;
}

.intro-hero__title em {
  font-style: normal;
  color: #4da8da;
}

.intro-hero__rule {
  width: 80px;
  height: 2px;
  background: #4da8da;
  margin: 0 auto 2.5rem;
}

.intro-hero__body {
  font-family: var(--font-serif);
  font-size: clamp(1.125rem, 2vw, 1.375rem);
  line-height: 1.75;
  max-width: 640px;
  margin: 0 auto;
  opacity: 0.85;
}

.intro-hero__scroll-cue {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  opacity: 0.35;
  animation: pulseDown 2s ease-in-out infinite;
}

@keyframes pulseDown {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.35; }
  50% { transform: translateX(-50%) translateY(6px); opacity: 0.55; }
}

/* Page 2 — Prima Air Approach */
.intro-approach {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.intro-approach__lead {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 600;
  line-height: 1.15;
  margin-bottom: 1.5rem;
}

.intro-approach__lead em {
  font-style: normal;
  color: var(--color-accent);
}

.intro-approach__text {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.intro-approach__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

.intro-stat {
  text-align: center;
}

.intro-stat__number {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 0.35rem;
}

.intro-stat__label {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-subtle);
}

.intro-approach__pillars {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.intro-pillar {
  padding: 1.25rem 1.5rem;
  border-left: 3px solid var(--color-accent);
  background: rgba(0, 102, 161, 0.04);
}

.intro-pillar__title {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 0.35rem;
}

.intro-pillar__desc {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--color-text-muted);
}

/* Page 3 — What We Found */
.intro-findings {
  text-align: center;
}

.intro-findings__kicker {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.25em;
  color: #4da8da;
  margin-bottom: 1.5rem;
}

.intro-findings__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 600;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.intro-findings__subtitle {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  line-height: 1.6;
  opacity: 0.7;
  max-width: 600px;
  margin: 0 auto 3rem;
}

.intro-domain-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1px;
  background: rgba(255, 255, 255, 0.08);
  max-width: 860px;
  margin: 0 auto;
}

.intro-domain {
  padding: 1.75rem 1.25rem;
  background: rgba(255, 255, 255, 0.03);
  text-align: left;
  transition: background 0.2s ease;
}

.intro-domain:hover {
  background: rgba(255, 255, 255, 0.06);
}

.intro-domain__name {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.intro-domain__count {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  opacity: 0.5;
}

/* Page 4 — How to Navigate */
.intro-navigate {
  text-align: center;
}

.intro-navigate__title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.intro-navigate__body {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  line-height: 1.75;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto 3rem;
}

.intro-anatomy {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  max-width: 780px;
  margin: 0 auto 3rem;
  text-align: left;
}

.intro-anatomy__item {
  padding: 1.5rem;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.intro-anatomy__num {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.intro-anatomy__label {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.intro-anatomy__desc {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  line-height: 1.55;
  color: var(--color-text-muted);
}

.intro-enter-btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #fff;
  background: var(--color-accent);
  border: none;
  padding: 0.9rem 2.5rem;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.15s ease;
}

.intro-enter-btn:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
}

/* Intro scroll-snap container */
.intro-sequence {
  scroll-snap-type: y mandatory;
  overflow-y: auto;
  height: 100vh;
  scroll-behavior: smooth;
}

.intro-page {
  scroll-snap-align: start;
}

/* Page indicators */
.intro-indicators {
  position: fixed;
  right: 2rem;
  top: 50%;
  transform: translateY(-50%);
  z-index: 400;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.intro-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: background 0.2s ease, transform 0.2s ease;
}

.intro-indicator.is-active {
  background: #4da8da;
  transform: scale(1.35);
}

.intro-page--warm .intro-indicator,
.intro-page--light .intro-indicator {
  background: rgba(0, 0, 0, 0.15);
}

/* Reveal animations */
.intro-reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.intro-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.intro-reveal--delay-1 { transition-delay: 0.15s; }
.intro-reveal--delay-2 { transition-delay: 0.3s; }
.intro-reveal--delay-3 { transition-delay: 0.45s; }
.intro-reveal--delay-4 { transition-delay: 0.6s; }
.intro-reveal--delay-5 { transition-delay: 0.75s; }

/* ═══════════════════════════════════════════════════════════
   INITIATIVE CAROUSEL — Horizontal slide deck
   ═══════════════════════════════════════════════════════════ */

.carousel-section {
  position: relative;
  height: 100vh;
  scroll-snap-align: start;
  overflow: hidden;
}

.carousel-viewport {
  height: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  display: flex;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.carousel-viewport::-webkit-scrollbar {
  display: none;
}

.carousel-slide {
  flex: 0 0 100vw;
  width: 100vw;
  height: 100vh;
  scroll-snap-align: start;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 6vw;
  position: relative;
  overflow: hidden;
}

/* Theme A — Dark ink, content left, large number right */
.carousel-slide--a {
  background: #0a1628;
  color: #f0ede8;
}

.carousel-slide--a .csl-number {
  color: rgba(77, 168, 218, 0.08);
}

.carousel-slide--a .csl-kicker {
  color: #4da8da;
}

.carousel-slide--a .csl-rule {
  background: #4da8da;
}

.carousel-slide--a .csl-quote-mark {
  color: rgba(77, 168, 218, 0.2);
}

/* Theme B — Warm paper, content right-biased, accent bar */
.carousel-slide--b {
  background: #f9f7f4;
  color: #1a1a1a;
}

.carousel-slide--b .csl-number {
  color: rgba(0, 102, 161, 0.06);
}

.carousel-slide--b .csl-kicker {
  color: var(--color-accent);
}

.carousel-slide--b .csl-rule {
  background: var(--color-accent);
}

.carousel-slide--b .csl-quote-mark {
  color: rgba(0, 102, 161, 0.15);
}

.carousel-slide--b .csl-body {
  color: var(--color-text-muted);
}

.carousel-slide--b .csl-quote-text {
  color: var(--color-text);
}

.carousel-slide--b .csl-quote-attr {
  color: var(--color-text-subtle);
}

/* Theme C — Deep blue, centered, large quote emphasis */
.carousel-slide--c {
  background: #002b47;
  color: #f0ede8;
}

.carousel-slide--c .csl-number {
  color: rgba(255, 255, 255, 0.04);
}

.carousel-slide--c .csl-kicker {
  color: #7ec8e3;
}

.carousel-slide--c .csl-rule {
  background: #7ec8e3;
}

.carousel-slide--c .csl-quote-mark {
  color: rgba(126, 200, 227, 0.25);
}

/* Theme D — Clean white, split layout */
.carousel-slide--d {
  background: #ffffff;
  color: #1a1a1a;
  border-right: 1px solid #e8e4dc;
}

.carousel-slide--d .csl-number {
  color: rgba(0, 0, 0, 0.03);
}

.carousel-slide--d .csl-kicker {
  color: #9a3412;
}

.carousel-slide--d .csl-rule {
  background: #9a3412;
}

.carousel-slide--d .csl-quote-mark {
  color: rgba(154, 52, 18, 0.15);
}

.carousel-slide--d .csl-body {
  color: var(--color-text-muted);
}

.carousel-slide--d .csl-quote-text {
  color: var(--color-text);
}

.carousel-slide--d .csl-quote-attr {
  color: var(--color-text-subtle);
}

/* Carousel slide inner layout */
.csl-inner {
  max-width: 780px;
  width: 100%;
  position: relative;
  z-index: 2;
}

/* Large background number */
.csl-number {
  position: absolute;
  right: -2vw;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-serif);
  font-size: clamp(12rem, 22vw, 20rem);
  font-weight: 600;
  line-height: 1;
  z-index: 1;
  pointer-events: none;
  user-select: none;
}

/* Content left layout (Themes A & C) */
.csl-layout--left .csl-inner {
  margin-right: auto;
}

.csl-layout--left .csl-number {
  right: -2vw;
}

/* Content right layout (Themes B & D) */
.csl-layout--right .csl-inner {
  margin-left: auto;
}

.csl-layout--right .csl-number {
  left: -2vw;
  right: auto;
}

/* Content centered (Theme C variant) */
.csl-layout--center .csl-inner {
  margin: 0 auto;
  text-align: center;
}

.csl-layout--center .csl-number {
  left: 50%;
  right: auto;
  transform: translateY(-50%) translateX(-50%);
}

.csl-layout--center .csl-rule {
  margin-left: auto;
  margin-right: auto;
}

.csl-layout--center .csl-body {
  margin-left: auto;
  margin-right: auto;
}

.csl-layout--center .csl-quote {
  text-align: center;
}

/* Kicker / eyebrow */
.csl-kicker {
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 1rem;
}

/* Title */
.csl-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 600;
  line-height: 1.15;
  margin-bottom: 1.25rem;
}

/* Horizontal rule accent */
.csl-rule {
  width: 48px;
  height: 2px;
  margin-bottom: 1.5rem;
}

/* Body text */
.csl-body {
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  line-height: 1.7;
  opacity: 0.85;
  margin-bottom: 2rem;
  max-width: 560px;
}

/* Pull quote block */
.csl-quote {
  position: relative;
  padding-left: 1.5rem;
  border-left: 2px solid currentColor;
  border-left-color: inherit;
  max-width: 520px;
}

.csl-layout--center .csl-quote {
  border-left: none;
  padding-left: 0;
  max-width: 600px;
  margin: 0 auto;
}

.csl-quote-mark {
  font-family: var(--font-serif);
  font-size: 4rem;
  line-height: 1;
  position: absolute;
  top: -0.75rem;
  left: -0.25rem;
}

.csl-layout--center .csl-quote-mark {
  position: static;
  display: block;
  margin-bottom: -1rem;
}

.csl-quote-text {
  font-family: var(--font-serif);
  font-size: clamp(1rem, 1.8vw, 1.25rem);
  line-height: 1.6;
  font-style: italic;
  margin-bottom: 0.75rem;
}

.csl-quote-attr {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.5;
}

/* Carousel navigation */
.carousel-nav {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 1rem;
  z-index: 10;
}

.carousel-nav__btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(0, 0, 0, 0.2);
  background: rgba(255, 255, 255, 0.85);
  color: #1a1a1a;
  font-size: 1.125rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.carousel-nav__btn:hover {
  background: #fff;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
}

.carousel-nav__btn:disabled {
  opacity: 0.25;
  cursor: default;
}

.carousel-nav__counter {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.7);
  min-width: 4rem;
  text-align: center;
  backdrop-filter: blur(8px);
  background: rgba(0, 0, 0, 0.35);
  padding: 0.35rem 0.75rem;
  border-radius: 1rem;
}

/* Progress bar under carousel */
.carousel-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  background: #4da8da;
  transition: width 0.3s ease;
  z-index: 10;
}

/* Final carousel slide — CTA to enter */
.carousel-slide--final {
  background: #0a1628;
  color: #f0ede8;
}

.carousel-final {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.carousel-final__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  line-height: 1.15;
  margin-bottom: 1.5rem;
}

.carousel-final__body {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  line-height: 1.75;
  opacity: 0.7;
  margin-bottom: 2.5rem;
}

.carousel-final__btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #0a1628;
  background: #4da8da;
  border: none;
  padding: 1rem 3rem;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.15s ease;
}

.carousel-final__btn:hover {
  background: #7ec8e3;
  transform: translateY(-1px);
}

/* Carousel reveal animations */
.csl-reveal {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.csl-reveal.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.csl-reveal--d1 { transition-delay: 0.1s; }
.csl-reveal--d2 { transition-delay: 0.2s; }
.csl-reveal--d3 { transition-delay: 0.3s; }
.csl-reveal--d4 { transition-delay: 0.4s; }
.csl-reveal--d5 { transition-delay: 0.5s; }

/* Responsive carousel */
@media (max-width: 900px) {
  .carousel-slide {
    padding: 3rem 2rem;
  }

  .csl-number {
    font-size: clamp(8rem, 18vw, 14rem);
    right: -1rem;
  }

  .csl-layout--right .csl-number {
    left: -1rem;
  }

  .csl-layout--right .csl-inner,
  .csl-layout--left .csl-inner {
    margin-left: 0;
    margin-right: 0;
  }
}

@media (max-width: 600px) {
  .global-jump-toggle {
    right: calc(0.5rem + 10px);
    bottom: 0.5rem;
  }

  .global-jump-drawer {
    width: 100vw;
  }

  .carousel-slide {
    padding: 2.5rem 1.25rem;
  }

  .csl-number {
    display: none;
  }
}

/* Hide main app when intro is showing */
body.intro-active .site-header,
body.intro-active .sidebar,
body.intro-active .chart-panel,
body.intro-active .app-layout {
  display: none;
}

body.intro-active {
  overflow: hidden;
}

/* Responsive intro */
@media (max-width: 900px) {
  .intro-approach {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .intro-anatomy {
    grid-template-columns: 1fr;
  }

  .intro-domain-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .intro-indicators {
    right: 1rem;
  }
}

@media (max-width: 600px) {
  .intro-page {
    padding: 3rem 1.25rem;
  }

  .intro-approach__stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
  }

  .intro-domain-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media print {
  .intro-sequence,
  .intro-indicators,
  .sidebar,
  .chart-panel,
  .global-jump-toggle,
  .global-jump-overlay,
  .global-jump-drawer,
  .site-header__toggle {
    display: none;
  }

  .app-layout {
    margin-left: 0;
    margin-right: 0;
    margin-top: 0;
  }

  .site-header {
    position: static;
  }
}

/* Loading overlay */
.loading-screen {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #1a1a1a;
  color: #f9f7f4;
  font-family: var(--font-sans);
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.loading-screen.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading-screen__title {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  margin: 0 0 0.5rem;
}

.loading-screen__subtitle {
  color: rgba(249, 247, 244, 0.7);
  margin: 0 0 1.5rem;
}

.loading-screen__spinner {
  width: 32px;
  height: 32px;
  border: 2px solid rgba(249, 247, 244, 0.2);
  border-top-color: #0066a1;
  border-radius: 50%;
  animation: sm-spin 0.8s linear infinite;
}

.loading-screen__error {
  max-width: 28rem;
  text-align: center;
  color: #fca5a5;
  margin-top: 1rem;
}

@keyframes sm-spin {
  to { transform: rotate(360deg); }
}