:root {
  --bg-primary: #fbfaf7;     /* Warm Ivory Paper */
  --bg-secondary: #ffffff;
  --bg-tertiary: #f2efe9;
  --bg-card: #ffffff;
  --bg-hero: #111111;        /* Editorial Dark Headers */
  --text-hero-primary: #ffffff;
  --text-hero-secondary: #a8a29e;
  
  --text-primary: #111111;    /* High Contrast Editorial Ink */
  --text-secondary: #3c3b37;
  --text-muted: #6b6661;
  --border-color: #dfdeda;    /* Crisp Newspaper Separators */
  --border-dark: #111111;
  
  --accent: #881337;         /* NYT Burgundy */
  --accent-hover: #9f1239;
  --accent-light: #fef2f2;
  --link-color: #1d4ed8;
  
  /* Pillar Theme Colors */
  --pillar-data-color: #1e3a8a;
  --pillar-data-bg: #eff6ff;
  --pillar-data-border: #bfdbfe;
  
  --pillar-compute-color: #581c87;
  --pillar-compute-bg: #faf5ff;
  --pillar-compute-border: #e9d5ff;
  
  --pillar-models-color: #881337;
  --pillar-models-bg: #fff1f2;
  --pillar-models-border: #ffe4e6;
  
  --pillar-deploy-color: #115e59;
  --pillar-deploy-bg: #f0fdfa;
  --pillar-deploy-border: #ccfbf1;

  --pillar-cross-color: #451a03;
  --pillar-cross-bg: #fefbeb;
  --pillar-cross-border: #fef3c7;

  /* Status Colors */
  --status-open-bg: rgba(220, 38, 38, 0.06);
  --status-open-color: #b91c1c;
  --status-open-border: rgba(220, 38, 38, 0.15);
  
  --status-operationalized-bg: rgba(13, 148, 136, 0.06);
  --status-operationalized-color: #0f766e;
  --status-operationalized-border: rgba(13, 148, 136, 0.15);
  
  --status-tractable-bg: rgba(37, 99, 235, 0.06);
  --status-tractable-color: #1d4ed8;
  --status-tractable-border: rgba(37, 99, 235, 0.15);
  
  --status-research-bg: rgba(109, 40, 217, 0.06);
  --status-research-color: #6d28d9;
  --status-research-border: rgba(109, 40, 217, 0.15);
  
  --status-partial-bg: rgba(217, 119, 6, 0.06);
  --status-partial-color: #b45309;
  --status-partial-border: rgba(217, 119, 6, 0.15);
  
  --status-default-bg: rgba(100, 116, 139, 0.06);
  --status-default-color: #475569;
  --status-default-border: rgba(100, 116, 139, 0.15);

  --font-serif: 'Lora', Georgia, serif;
  --font-sans: 'Plus Jakarta Sans', system-ui, sans-serif;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.03), 0 2px 4px -2px rgba(0, 0, 0, 0.03);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

body.dark-mode {
  --bg-primary: #0b0e14;     /* Ink Dark Paper */
  --bg-secondary: #111420;
  --bg-tertiary: #191d2c;
  --bg-card: #111420;
  --bg-hero: #07090e;
  --text-hero-primary: #f3f4f6;
  --text-hero-secondary: #9ca3af;
  
  --text-primary: #f3f4f6;
  --text-secondary: #cbd5e1;
  --text-muted: #9ca3af;
  --border-color: #232a3e;
  --border-dark: #f3f4f6;
  
  --accent: #fbbf24;         /* Newspaper Gold Accent */
  --accent-hover: #fcd34d;
  --accent-light: #2c2514;
  --link-color: #60a5fa;
  
  --pillar-data-color: #60a5fa;
  --pillar-data-bg: rgba(30, 58, 138, 0.2);
  --pillar-data-border: #1e40af;
  
  --pillar-compute-color: #c084fc;
  --pillar-compute-bg: rgba(88, 28, 135, 0.2);
  --pillar-compute-border: #6b21a8;
  
  --pillar-models-color: #fda4af;
  --pillar-models-bg: rgba(136, 19, 55, 0.2);
  --pillar-models-border: #9f1239;
  
  --pillar-deploy-color: #2dd4bf;
  --pillar-deploy-bg: rgba(17, 94, 89, 0.2);
  --pillar-deploy-border: #115e59;

  --pillar-cross-color: #fcd34d;
  --pillar-cross-bg: rgba(69, 26, 3, 0.2);
  --pillar-cross-border: #78350f;

  --status-open-bg: rgba(248, 113, 113, 0.12);
  --status-open-color: #f87171;
  --status-open-border: rgba(248, 113, 113, 0.2);
  
  --status-operationalized-bg: rgba(45, 212, 191, 0.12);
  --status-operationalized-color: #2dd4bf;
  --status-operationalized-border: rgba(45, 212, 191, 0.2);
  
  --status-tractable-bg: rgba(96, 165, 250, 0.12);
  --status-tractable-color: #60a5fa;
  --status-tractable-border: rgba(96, 165, 250, 0.2);
  
  --status-research-bg: rgba(192, 132, 252, 0.12);
  --status-research-color: #c084fc;
  --status-research-border: rgba(192, 132, 252, 0.2);
  
  --status-partial-bg: rgba(251, 191, 36, 0.12);
  --status-partial-color: #fbbf24;
  --status-partial-border: rgba(251, 191, 36, 0.2);
}

/* Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-serif);
  line-height: 1.7;
  transition: background-color 0.2s ease, color 0.2s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1300px;
  width: 100%;
  margin: 0 auto;
  padding: 0 24px;
}

a {
  color: var(--link-color);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color 0.15s ease;
}
a:hover {
  color: var(--accent);
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85em;
  background: var(--bg-tertiary);
  padding: 0.15em 0.3em;
  border-radius: var(--radius-sm);
  word-break: break-word;
}

blockquote {
  margin: 1.5rem 0;
  padding: 0.5rem 1.5rem;
  border-left: 2px solid var(--border-dark);
  color: var(--text-secondary);
  font-style: italic;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 1rem;
  background: var(--bg-secondary);
  color: var(--accent);
  padding: 0.5rem 1rem;
  border: 1px solid var(--border-color);
  z-index: 9999;
}
.skip-link:focus {
  left: 1rem;
}

/* Navigation Bar */
.navbar {
  background: var(--bg-secondary);
  border-bottom: 2px solid var(--border-dark);
  height: 72px;
  display: flex;
  align-items: center;
  z-index: 100;
  transition: background-color 0.2s ease;
}
.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.nav-logo {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none !important;
}
.nav-logo-icon {
  background: var(--border-dark);
  color: var(--bg-secondary);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 0.9rem;
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}
.btn-toggle-theme {
  background: var(--bg-tertiary);
  border: 0;
  color: var(--text-primary);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.btn-toggle-theme svg {
  width: 18px;
  height: 18px;
}
.btn-toggle-theme .sun-icon { display: block; }
.btn-toggle-theme .moon-icon { display: none; }
body.dark-mode .btn-toggle-theme .sun-icon { display: none; }
body.dark-mode .btn-toggle-theme .moon-icon { display: block; }

.nav-paper-link {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-primary);
  text-decoration: none !important;
}

/* Hero Title Section */
.hero {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 48px 0;
  text-align: center;
}
.hero-eyebrow {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 12px;
  display: inline-block;
}
.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.025em;
  max-width: 900px;
  margin: 0 auto 16px;
  color: var(--text-primary);
}
.hero-meta {
  font-family: var(--font-sans);
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  font-size: 0.85rem;
  color: var(--text-muted);
  max-width: 800px;
  margin: 20px auto 0;
  padding-top: 16px;
  border-top: 1px dashed var(--border-color);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.hero-meta strong {
  color: var(--text-primary);
}

/* Main Layout Wrapper */
.main-content {
  flex: 1;
  padding: 40px 0;
}

/* Infographic Matrix */
.dashboard-section-title {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 12px;
}
.dashboard-section-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-color);
}

.matrix-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 24px;
  margin-bottom: 40px;
}
.matrix-container {
  overflow-x: auto;
}
.matrix-grid {
  display: grid;
  grid-template-columns: 200px repeat(4, 1fr);
  min-width: 850px;
  border: 1px solid var(--border-dark);
}
.matrix-cell {
  padding: 12px;
  border-right: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-content: center;
}
.matrix-cell:nth-child(5n) {
  border-right: 0;
}
.matrix-grid > :nth-last-child(-n+5) {
  border-bottom: 0;
}
.matrix-header-cell {
  background: var(--bg-tertiary);
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.matrix-row-label {
  background: var(--bg-tertiary);
  flex-direction: column;
  justify-content: center;
  align-content: stretch;
  gap: 2px;
}
.row-title {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: 0.95rem;
}
.row-desc {
  font-family: var(--font-sans);
  font-size: 0.7rem;
  color: var(--text-muted);
  line-height: 1.25;
}

/* Badge styles */
.matrix-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 24px;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 800;
  cursor: pointer;
  background-color: var(--s-bg);
  color: var(--s-color);
  border: 1px solid var(--s-border);
  text-decoration: none !important;
  transition: transform 0.1s ease;
}
.matrix-badge:hover {
  transform: scale(1.06);
  border-color: var(--s-color);
}

/* Governance & Ecosystem horizontal panels */
.governance-ecosystem-sections {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 40px;
}
.gov-eco-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 20px;
}
.gov-eco-card h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 6px;
}
.gov-eco-desc {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.35;
  margin-bottom: 12px;
}
.gov-eco-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* Custom Tooltip */
.custom-tooltip {
  position: absolute;
  padding: 6px 10px;
  background: #111111;
  color: #ffffff;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  pointer-events: none;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.1);
  line-height: 1.3;
  opacity: 0;
  transition: opacity 0.12s ease;
  max-width: 220px;
}
.custom-tooltip small {
  color: #a8a29e;
  display: block;
  margin-top: 2px;
}

/* Stats panel */
.stats-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 40px;
}
.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 16px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s ease;
}
.stat-card:hover {
  border-color: var(--border-dark);
}
.stat-card .stat-val {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 4px;
}
.stat-card .stat-label {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}
.stat-card .stat-bar {
  height: 3px;
  background: var(--bg-tertiary);
  margin-top: 10px;
  overflow: hidden;
}
.stat-card .stat-bar-fill {
  height: 100%;
}

/* Executive summary card */
.exec-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 24px;
  margin-bottom: 40px;
  font-size: 1rem;
  line-height: 1.68;
}
.exec-card h3 {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  border-bottom: 1px solid var(--border-dark);
  padding-bottom: 6px;
}

/* Reader Guide Card & Table */
.reader-guide-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 24px;
  margin-bottom: 40px;
}
.table-container {
  overflow-x: auto;
  margin-top: 12px;
}
.reader-guide-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  line-height: 1.5;
}
.reader-guide-table th {
  border-bottom: 2px solid var(--border-dark);
  padding: 8px 12px;
  text-align: left;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.72rem;
  color: var(--text-muted);
}
.reader-guide-table td {
  padding: 8px 12px;
  vertical-align: top;
}
.reader-guide-table tr.group-start td {
  border-top: 1px solid var(--border-color);
}
.reader-guide-table td.bg-label {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--text-primary);
  vertical-align: middle;
  border-right: 1px solid var(--border-color);
}
.table-link {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 2px 6px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  text-decoration: none !important;
  margin-right: 4px;
  margin-bottom: 4px;
}
.table-link:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
}

/* Explorer layout (Dashboard) */
.explorer-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 32px;
  align-items: start;
}

/* Filters Sidebar */
.sidebar-filters {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 20px;
  position: sticky;
  top: 96px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.filter-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.filter-label {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}
.search-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}
.search-input, .sidebar-search-input {
  width: 100%;
  padding: 8px 10px 8px 32px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.82rem;
}
.search-input:focus, .sidebar-search-input:focus {
  outline: 0;
  border-color: var(--border-dark);
}
.search-icon {
  position: absolute;
  left: 10px;
  color: var(--text-muted);
  width: 14px;
  height: 14px;
  pointer-events: none;
}

/* Radio button list */
.pillar-filter-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.pillar-filter-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  text-align: left;
}
.pillar-filter-btn:hover {
  background: var(--bg-tertiary);
}
.pillar-filter-btn.active {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-left: 2px solid var(--border-dark);
}
.status-select {
  width: 100%;
  padding: 8px 10px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  cursor: pointer;
}
.btn-reset-filters {
  padding: 8px;
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
}
.btn-reset-filters:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

/* Topics list Cards (NYT Article card style) */
.topics-grid {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.topic-card {
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--border-color);
  padding: 24px 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.topic-card:last-child {
  border-bottom: 0;
}
.topic-card.hidden {
  display: none !important;
}
.topic-card-header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
}
.topic-card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}
.topic-card-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-primary);
  margin-top: 4px;
}
.topic-card-title a {
  color: var(--text-primary);
  text-decoration: none !important;
}
.topic-card-title a:hover {
  color: var(--accent);
}
.topic-card-status-line {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--s-color);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 2px;
}
.topic-card-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--s-color);
}
.topic-card-excerpt {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-top: 4px;
}

/* Cross-topic agenda grid */
.agenda-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}
.agenda-card {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-dark);
  padding: 16px 0;
}
.agenda-card h4 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 6px;
}
.agenda-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ==========================================================================
   Detail View / Subpages Layout
   ========================================================================== */
.topic-subpage-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 40px;
  align-items: start;
}

.sidebar-navigation {
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  position: sticky;
  top: 96px;
  max-height: calc(100vh - 120px);
  display: flex;
  flex-direction: column;
}
.sidebar-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.btn-sidebar-close {
  display: none;
  background: transparent;
  border: 0;
  color: var(--text-primary);
  font-size: 1.2rem;
  align-self: flex-end;
  cursor: pointer;
}
.sidebar-content {
  overflow-y: auto;
  padding: 16px 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.sidebar-section h4 {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.sidebar-topics {
  list-style-type: none;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.sidebar-topics li {
  font-size: 0.78rem;
  line-height: 1.35;
}
.sidebar-topics li.hidden {
  display: none !important;
}
.sidebar-section.hidden {
  display: none !important;
}
.sidebar-topics a {
  display: flex;
  gap: 8px;
  color: var(--text-secondary);
  text-decoration: none !important;
  padding: 4px 6px;
  border-radius: var(--radius-sm);
}
.sidebar-topics a:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}
.sidebar-topics a.active {
  background: var(--accent-light);
  color: var(--accent);
  font-weight: 700;
}
body.dark-mode .sidebar-topics a.active {
  background: rgba(253, 186, 116, 0.1);
  color: var(--accent);
}
.sidebar-num {
  font-family: var(--font-sans);
  font-weight: 800;
}

/* Detail view content area */
.detail-container {
  padding-bottom: 40px;
}
.detail-header {
  border-bottom: 2px solid var(--border-dark);
  padding-bottom: 20px;
  margin-bottom: 28px;
}
.btn-back-link {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  text-decoration: none !important;
  margin-bottom: 16px;
}
.btn-back-link:hover {
  color: var(--text-primary);
}
.detail-breadcrumbs {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.bc-divider {
  color: var(--border-color);
}
.bc-active {
  color: var(--accent);
}
.detail-header h2 {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin-bottom: 12px;
}
.detail-status-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-sans);
  font-size: 0.8rem;
}
.status-label {
  font-weight: 800;
  color: var(--text-muted);
}

/* Side-by-side compare box */
.detail-comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-bottom: 32px;
}
.detail-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 24px;
}
.detail-card .card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
}
.detail-card .card-header h3 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 800;
}
.original-problem-card .card-header h3 {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}
.original-problem-card .card-content {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  line-height: 1.65;
  color: var(--text-secondary);
}
.update-card {
  background-color: var(--accent-light);
  border-color: rgba(136, 19, 55, 0.1);
}
body.dark-mode .update-card {
  background-color: rgba(253, 186, 116, 0.03);
  border-color: rgba(253, 186, 116, 0.1);
}
.update-card h3 {
  color: var(--accent);
}
.update-card .card-content {
  font-size: 0.95rem;
  line-height: 1.65;
}

/* Lists grid */
.detail-lists-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}
.list-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 20px;
}
.list-card-header {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}
.list-card-header h4 {
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.list-card ul {
  list-style-type: none;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.list-card li {
  font-size: 0.82rem;
  line-height: 1.45;
  position: relative;
  padding-left: 16px;
}
.operationalized-list-card { border-top: 2px solid var(--status-operationalized-color); }
.operationalized-list-card li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--status-operationalized-color);
  font-weight: bold;
}
.tractable-list-card { border-top: 2px solid var(--status-tractable-color); }
.tractable-list-card li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--status-tractable-color);
}
.open-list-card { border-top: 2px solid var(--status-open-color); }
.open-list-card li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--status-open-color);
  font-weight: bold;
  font-size: 1.1rem;
  line-height: 0.9;
}
.list-card li.empty-state {
  padding-left: 0;
  color: var(--text-muted);
  font-style: italic;
}
.list-card li.empty-state::before { content: ''; }

/* Citations & Evidence */
.detail-evidence-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 24px;
}
.evidence-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}
.evidence-header h3 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 800;
}
.evidence-list {
  list-style-type: none;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.evidence-list li {
  font-size: 0.85rem;
  line-height: 1.5;
  padding-left: 20px;
  position: relative;
}
.evidence-list li::before {
  content: '§';
  position: absolute;
  left: 0;
  top: 0;
}

/* Mobile responsive menu header */
.mobile-nav-bar {
  display: none;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  padding: 10px 16px;
  position: sticky;
  top: 0;
  z-index: 90;
  align-items: center;
  justify-content: space-between;
}
.btn-menu-toggle {
  background: transparent;
  border: 1px solid var(--border-color);
  padding: 4px 8px;
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  color: var(--text-primary);
}
.mobile-nav-title {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: 0.95rem;
}

/* Footer styling */
footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 24px 0;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: auto;
}
footer .container {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

/* Media Queries */
@media (max-width: 1024px) {
  .mobile-nav-bar {
    display: flex;
  }
  .navbar {
    display: none;
  }
  .hero {
    padding: 32px 0;
  }
  .hero h1 {
    font-size: 1.85rem;
  }
  .explorer-layout, .topic-subpage-layout {
    grid-template-columns: 1fr;
  }
  .sidebar-filters, .sidebar-navigation {
    position: fixed;
    top: 0;
    left: -320px;
    width: 300px;
    height: 100vh;
    z-index: 1000;
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.15);
    transition: left 0.3s ease;
    overflow-y: auto;
  }
  .sidebar-filters.open, .sidebar-navigation.open {
    left: 0;
  }
  .btn-sidebar-close {
    display: block;
  }
  .governance-ecosystem-sections {
    grid-template-columns: 1fr;
  }
  .detail-comparison-grid {
    grid-template-columns: 1fr;
  }
  .detail-lists-grid {
    grid-template-columns: 1fr;
  }
}

/* Print Overrides */
@media print {
  body { background: white; color: black; }
  .navbar, .hero-meta, .mobile-nav-bar, .sidebar-navigation, .sidebar-filters, footer {
    display: none !important;
  }
  .main-content { padding: 0; }
  .topic-subpage-layout { display: block; }
  .detail-comparison-grid { grid-template-columns: 1fr; }
  .detail-lists-grid { grid-template-columns: 1fr; }
  .detail-card, .list-card, .detail-evidence-card {
    border: 1px solid #ccc;
    box-shadow: none;
    margin-bottom: 20px;
    page-break-inside: avoid;
  }
}