:root {
  /* Color Palette - Cybernetic Dark Mode */
  --bg-color: #0a0a0c;
  --surface-color: #16161d;
  --surface-color-2: #1d1d26;
  --text-primary: #e0e0e0;
  --text-secondary: #a0a0a0;
  --border-color: rgba(255, 255, 255, 0.1);

  /* Accents */
  --accent-ai: #00f2ff; /* Neon Cyan */
  --accent-quantum: #b026ff; /* Electric Purple */
  --accent-intersection: #ffb800; /* Fusion Amber */
  --accent-risk: #ff4d4d; /* Warning Red */
  --accent-caution: #ffb020; /* Caution Amber */
  --accent-success: #00ff88; /* Success Green */

  /* Spacing & Layout */
  --container-width: 1200px;
  --gap: 2rem;
  --transition-speed: 0.3s;
  --border-radius: 8px;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3 {
  color: #fff;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

/* Layout */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--gap);
}

section {
  padding: 5rem 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

/* Utilities */
.glow-text-ai {
  text-shadow: 0 0 10px var(--accent-ai);
  color: var(--accent-ai);
}

.glow-text-quantum {
  text-shadow: 0 0 10px var(--accent-quantum);
  color: var(--accent-quantum);
}

.btn {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-speed) ease;
  background: transparent;
  border: 1px solid currentColor;
  color: inherit;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.8s ease forwards;
}

/* ==========================================================================
   Shared Navigation (used across all pages)
   ========================================================================== */
nav.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1.25rem var(--gap);
  background: rgba(10, 10, 12, 0.82);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
}

nav.site-nav .logo {
  font-weight: 800;
  font-size: 1.15rem;
  text-decoration: none;
  color: #fff;
  letter-spacing: 1.5px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

nav.site-nav .logo .logo-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-ai);
  box-shadow: 0 0 8px var(--accent-ai);
}

nav.site-nav .nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

nav.site-nav .nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.3px;
  transition: color var(--transition-speed);
  position: relative;
  padding-bottom: 4px;
}

nav.site-nav .nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: currentColor;
  transition: width var(--transition-speed);
}

nav.site-nav .nav-links a:hover,
nav.site-nav .nav-links a.active {
  color: #fff;
}

nav.site-nav .nav-links a:hover::after,
nav.site-nav .nav-links a.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.4rem;
  z-index: 200;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: #fff;
  transition: all var(--transition-speed);
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  nav.site-nav .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    height: 100vh;
    width: min(75vw, 320px);
    background: rgba(10, 10, 12, 0.98);
    border-left: 1px solid var(--border-color);
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 0 3rem;
    gap: 2rem;
    transition: right var(--transition-speed) ease;
  }

  nav.site-nav .nav-links.open {
    right: 0;
  }

  nav.site-nav .nav-links a {
    font-size: 1.1rem;
  }
}

/* ==========================================================================
   Page Header (used by ai / quantum / intersection / conclusion pages)
   ========================================================================== */
.page-header {
  padding-top: 9rem;
  padding-bottom: 3rem;
  min-height: auto;
  display: block;
}

.page-header .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.78rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

.page-header .eyebrow .eyebrow-line {
  width: 32px;
  height: 1px;
  background: currentColor;
}

.page-header h1 {
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  max-width: 900px;
}

.page-header .lede {
  font-size: 1.15rem;
  max-width: 700px;
  color: var(--text-secondary);
}

.breadcrumb {
  position: fixed;
  top: 5.5rem;
  left: var(--gap);
  z-index: 90;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color var(--transition-speed);
}

.back-link:hover { color: #fff; }

/* ==========================================================================
   Sections & Scroll Reveal
   ========================================================================== */
section.content-layer {
  /* Visible by default so content never depends on JS to be readable. */
  opacity: 1;
  transform: none;
  flex-direction: column;
  align-items: flex-start;
  display: flex;
  min-height: auto;
  padding: 3rem 0;
}

/* JS adds this class right before observing, so the fade-in only happens
   when we know the IntersectionObserver is actually going to fire. */
section.content-layer.pre-reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

section.content-layer.pre-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.section-heading {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.section-heading .index-num {
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 1px;
  opacity: 0.6;
}

.section-heading h2 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  margin-bottom: 0;
}

/* ==========================================================================
   Cards & Grids
   ========================================================================== */
.grid {
  display: grid;
  gap: 1.5rem;
  width: 100%;
}

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

@media (max-width: 900px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

.card {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 1.75rem;
  transition: transform var(--transition-speed), border-color var(--transition-speed), background var(--transition-speed);
}

.card:hover {
  transform: translateY(-4px);
  background: var(--surface-color-2);
}

.card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.card p {
  font-size: 0.94rem;
  margin-bottom: 0;
}

.card .card-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* Topic teaser cards on the homepage */
.topic-card {
  display: block;
  text-decoration: none;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2rem;
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-speed), border-color var(--transition-speed);
}

.topic-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 0%, var(--tint, var(--accent-ai)) 0%, transparent 60%);
  opacity: 0.12;
  transition: opacity var(--transition-speed);
}

.topic-card:hover {
  transform: translateY(-6px);
  border-color: var(--tint, var(--accent-ai));
}

.topic-card:hover::before { opacity: 0.22; }

.topic-card .topic-label {
  font-size: 0.78rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--tint, var(--accent-ai));
  margin-bottom: 0.75rem;
  display: block;
}

.topic-card h3 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

.topic-card p {
  font-size: 0.95rem;
}

.topic-card .topic-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1.25rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--tint, var(--accent-ai));
}

.topic-card .topic-arrow svg {
  transition: transform var(--transition-speed);
}

.topic-card:hover .topic-arrow svg {
  transform: translateX(4px);
}

/* ==========================================================================
   Benefit / Drawback / Risk Panels
   ========================================================================== */
.stance-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  width: 100%;
}

@media (max-width: 900px) {
  .stance-grid { grid-template-columns: 1fr; }
}

.stance-panel {
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  background: var(--surface-color);
  padding: 1.75rem;
  border-top: 3px solid var(--stance-color, var(--accent-ai));
}

.stance-panel .stance-title {
  font-size: 0.78rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--stance-color, var(--accent-ai));
  margin-bottom: 1rem;
  font-weight: 700;
}

.stance-panel ul {
  list-style: none;
}

.stance-panel li {
  padding-left: 1.1rem;
  position: relative;
  margin-bottom: 1rem;
  font-size: 0.94rem;
  color: var(--text-secondary);
}

.stance-panel li:last-child { margin-bottom: 0; }

.stance-panel li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--stance-color, var(--accent-ai));
}

.stance-panel li strong {
  color: var(--text-primary);
  display: block;
  margin-bottom: 0.15rem;
  font-size: 0.98rem;
}

.stance-panel.benefits { --stance-color: var(--accent-success); }
.stance-panel.drawbacks { --stance-color: var(--accent-caution); }
.stance-panel.risks { --stance-color: var(--accent-risk); }

/* ==========================================================================
   Badges, quotes, dividers, stats
   ========================================================================== */
.badge {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  border: 1px solid currentColor;
  font-weight: 600;
}

.divider {
  width: 100%;
  height: 1px;
  background: var(--border-color);
  margin: 0.5rem 0;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  width: 100%;
}

@media (max-width: 900px) {
  .stat-row { grid-template-columns: 1fr; }
}

.stat {
  padding: 1.5rem 0;
  border-top: 1px solid var(--border-color);
}

.stat .stat-value {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  color: #fff;
  line-height: 1;
  margin-bottom: 0.5rem;
}

.stat .stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

blockquote.pull-quote {
  border-left: 2px solid var(--accent-ai);
  padding-left: 1.5rem;
  font-size: 1.25rem;
  color: var(--text-primary);
  font-style: italic;
  max-width: 800px;
  margin: 1rem 0;
}

/* Comparison table (used on Quantum & Intersection pages) */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.data-table th, .data-table td {
  text-align: left;
  padding: 0.9rem 1rem;
  border-bottom: 1px solid var(--border-color);
}

.data-table th {
  color: #fff;
  font-weight: 700;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.data-table td { color: var(--text-secondary); }
.data-table tr:hover td { color: var(--text-primary); }

/* Timeline (used on Quantum & Intersection pages) */
.timeline {
  position: relative;
  width: 100%;
  padding-left: 2rem;
  border-left: 1px solid var(--border-color);
}

.timeline-item {
  position: relative;
  margin-bottom: 2rem;
}

.timeline-item:last-child { margin-bottom: 0; }

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2.4rem;
  top: 0.3rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--bg-color);
  border: 2px solid var(--marker-color, var(--accent-ai));
}

.timeline-item .timeline-year {
  font-size: 0.78rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--marker-color, var(--accent-ai));
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.timeline-item h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 0.3rem;
}

.timeline-item p { margin-bottom: 0; font-size: 0.92rem; }

/* ==========================================================================
   Cross-navigation / page footer
   ========================================================================== */
.page-nav-links {
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  gap: 1.5rem;
  width: 100%;
}

@media (max-width: 700px) {
  .page-nav-links { flex-direction: column; }
}

.page-nav-link {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.5rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  text-decoration: none;
  transition: border-color var(--transition-speed), transform var(--transition-speed);
}

.page-nav-link:hover {
  transform: translateY(-3px);
  border-color: var(--text-primary);
}

.page-nav-link.next { text-align: right; align-items: flex-end; }

.page-nav-link .page-nav-label {
  font-size: 0.72rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.page-nav-link .page-nav-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
}

footer.site-footer {
  border-top: 1px solid var(--border-color);
  padding: 3rem 0 2.5rem;
  margin-top: 2rem;
}

footer.site-footer .footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

footer.site-footer p {
  font-size: 0.82rem;
  margin-bottom: 0;
}

footer.site-footer .footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

footer.site-footer .footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.82rem;
}

footer.site-footer .footer-links a:hover { color: #fff; }

/* Utility */
.text-ai { color: var(--accent-ai); }
.text-quantum { color: var(--accent-quantum); }
.text-intersection { color: var(--accent-intersection); }
.max-w-prose { max-width: 760px; }
.mt-2 { margin-top: 2rem; }
.mb-0 { margin-bottom: 0 !important; }

/* ==========================================================================
   Feedback Survey Modal (homepage only)
   ========================================================================== */
.survey-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 5, 7, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}

.survey-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.survey-modal {
  width: 100%;
  max-width: 640px;
  max-height: 88vh;
  overflow-y: auto;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: 2rem;
  position: relative;
  box-shadow: 0 0 0 1px rgba(0, 242, 255, 0.08), 0 20px 60px rgba(0, 0, 0, 0.5);
  transform: translateY(16px) scale(0.98);
  transition: transform 0.35s ease;
}

.survey-overlay.open .survey-modal {
  transform: translateY(0) scale(1);
}

.survey-modal .survey-close {
  position: absolute;
  top: 1.1rem;
  right: 1.1rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.4rem;
  line-height: 1;
  transition: color var(--transition-speed);
}

.survey-modal .survey-close:hover { color: #fff; }

.survey-modal .survey-eyebrow {
  font-size: 0.75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent-ai);
  margin-bottom: 0.5rem;
  display: block;
}

.survey-modal h2 {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
  padding-right: 1.5rem;
}

.survey-modal > p.survey-intro {
  font-size: 0.92rem;
  margin-bottom: 1.75rem;
}

.survey-question {
  border: none;
  margin: 0 0 1.75rem;
  padding: 0 0 1.75rem;
  border-bottom: 1px solid var(--border-color);
}

.survey-question:last-of-type {
  border-bottom: none;
  margin-bottom: 0.5rem;
  padding-bottom: 0;
}

.survey-question legend {
  font-size: 0.96rem;
  color: var(--text-primary);
  font-weight: 600;
  margin-bottom: 0.9rem;
  padding: 0;
}

.survey-scale {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 0.5rem;
}

.survey-scale-option {
  flex: 1;
}

.survey-scale-option input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}

.survey-scale-option label {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 2.4rem;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-speed);
}

.survey-scale-option label:hover {
  border-color: var(--accent-ai);
  color: #fff;
}

.survey-scale-option input:checked + label {
  background: rgba(0, 242, 255, 0.14);
  border-color: var(--accent-ai);
  color: var(--accent-ai);
  box-shadow: 0 0 12px rgba(0, 242, 255, 0.25);
}

.survey-scale-option input:focus-visible + label {
  outline: 2px solid var(--accent-ai);
  outline-offset: 2px;
}

.survey-scale-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--text-secondary);
  letter-spacing: 0.3px;
}

.survey-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.survey-skip {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 0.85rem;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-speed);
}

.survey-skip:hover { color: #fff; }

.survey-submit {
  cursor: pointer;
  font-family: inherit;
  font-size: 0.9rem;
}

.survey-submit:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.survey-thanks {
  text-align: center;
  padding: 1.5rem 0;
}

.survey-thanks .survey-thanks-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--accent-success);
  color: var(--accent-success);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  font-size: 1.2rem;
}

.survey-thanks h2 { font-size: 1.2rem; margin-bottom: 0.5rem; }
.survey-thanks p { margin-bottom: 0; font-size: 0.9rem; }

@media (max-width: 560px) {
  .survey-modal { padding: 1.5rem; }
  .survey-scale { gap: 0.25rem; }
  .survey-scale-option label { height: 2.1rem; font-size: 0.78rem; }
  .survey-scale-labels { font-size: 0.66rem; }
}