/* ============================================
   OdysseyAI — Futuristic Dark Theme
   ============================================ */

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #0f0f18;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.06);
  --text-primary: #e8e8ef;
  --text-secondary: #6b6b80;
  --text-muted: #3a3a50;
  --accent: #7b61ff;
  --accent-glow: rgba(123, 97, 255, 0.3);
  --accent-secondary: #00d4aa;
  --border: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);
  --font-sans: 'Space Grotesk', -apple-system, sans-serif;
  --font-mono: 'Space Mono', monospace;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);
}

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

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) var(--bg-primary);
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--accent);
  color: #fff;
}

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 2px; }

a { color: inherit; text-decoration: none; }

/* Cursor Glow */
#cursor-glow {
  position: fixed;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
  opacity: 0.15;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s;
}

/* Particle Canvas */
#particle-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* Navigation */
#nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 3rem;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: transform 0.4s var(--ease-out-expo), background 0.3s;
}

#nav.nav-hidden {
  transform: translateY(-100%);
}

.nav-logo {
  position: relative;
}

.logo-text {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color 0.3s;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.3s var(--ease-out-expo);
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-link:hover::after {
  width: 100%;
}

.nav-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-secondary);
  animation: pulse-dot 2s ease-in-out infinite;
}

.status-text {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--text-muted);
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 212, 170, 0.4); }
  50% { opacity: 0.7; box-shadow: 0 0 0 6px rgba(0, 212, 170, 0); }
}

/* Hero Section */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  z-index: 1;
}

.hero-grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 2rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: fadeInUp 1s var(--ease-out-expo) 0.3s forwards;
}

.badge-line {
  width: 40px;
  height: 1px;
  background: var(--text-muted);
}

.badge-text {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--text-muted);
}

.hero-title {
  font-size: clamp(3.5rem, 8vw, 7.5rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.03em;
  margin-bottom: 2rem;
}

.title-line {
  display: block;
  opacity: 0;
  transform: translateY(60px);
  animation: titleReveal 1.2s var(--ease-out-expo) 0.5s forwards;
}

.title-accent {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation-delay: 0.7s;
}

@keyframes titleReveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-tagline {
  font-size: clamp(1rem, 2vw, 1.35rem);
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 500px;
  margin: 0 auto 3rem;
  opacity: 0;
  animation: fadeInUp 1s var(--ease-out-expo) 0.9s forwards;
}

.hero-cta {
  opacity: 0;
  animation: fadeInUp 1s var(--ease-out-expo) 1.1s forwards;
}

.cta-button {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 2rem;
  border: 1px solid var(--border-hover);
  border-radius: 60px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-primary);
  transition: all 0.4s var(--ease-out-expo);
  position: relative;
  overflow: hidden;
}

.cta-button::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  opacity: 0;
  transition: opacity 0.4s;
  border-radius: inherit;
}

.cta-button:hover::before {
  opacity: 1;
}

.cta-button:hover {
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 10px 40px var(--accent-glow);
}

.cta-text, .cta-arrow {
  position: relative;
  z-index: 1;
}

.cta-arrow {
  transition: transform 0.3s var(--ease-out-expo);
}

.cta-button:hover .cta-arrow {
  transform: translateX(4px);
}

.cta-primary {
  background: linear-gradient(135deg, var(--accent), #6246ea);
  border-color: transparent;
}

.cta-primary::before {
  background: linear-gradient(135deg, var(--accent-secondary), var(--accent));
}

.scroll-indicator {
  position: absolute;
  bottom: 3rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  opacity: 0;
  animation: fadeInUp 1s var(--ease-out-expo) 1.5s forwards;
}

.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

.scroll-text {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.3em;
  color: var(--text-muted);
}

@keyframes scrollPulse {
  0%, 100% { opacity: 1; transform: scaleY(1); }
  50% { opacity: 0.3; transform: scaleY(0.6); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Section Common */
section {
  position: relative;
  z-index: 1;
}

.section-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 10rem 3rem;
}

.section-label {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 4rem;
}

.label-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.1em;
}

.label-line {
  width: 60px;
  height: 1px;
  background: var(--border-hover);
}

.label-text {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--text-muted);
}

/* Vision Section */
.vision-heading {
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 5rem;
  max-width: 700px;
}

.text-accent {
  color: var(--accent);
}

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

.vision-card {
  padding: 2.5rem;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--bg-card);
  transition: all 0.5s var(--ease-out-expo);
  position: relative;
  overflow: hidden;
}

.vision-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.5s;
}

.vision-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
}

.vision-card:hover::before {
  opacity: 1;
}

.card-icon {
  width: 48px;
  height: 48px;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.vision-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.vision-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Timeline / Voyage Section */
#voyage {
  background: var(--bg-secondary);
}

.timeline {
  position: relative;
  padding-left: 60px;
}

.timeline-line {
  position: absolute;
  left: 20px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border);
}

.timeline-progress {
  width: 100%;
  height: 0%;
  background: linear-gradient(to bottom, var(--accent), var(--accent-secondary));
  transition: height 0.1s linear;
  box-shadow: 0 0 20px var(--accent-glow);
}

.timeline-entry {
  position: relative;
  margin-bottom: 6rem;
}

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

.timeline-entry::before {
  content: attr(data-year);
  position: absolute;
  left: -60px;
  top: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  transform: rotate(-90deg) translateX(-100%);
  transform-origin: left top;
  white-space: nowrap;
}

.timeline-marker {
  position: absolute;
  left: -48px;
  top: 8px;
  width: 16px;
  height: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.marker-ring {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: var(--bg-primary);
  position: relative;
  z-index: 2;
  transition: all 0.3s;
}

.marker-active .marker-ring {
  background: var(--accent);
  box-shadow: 0 0 20px var(--accent-glow);
}

.marker-pulse {
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid var(--accent);
  opacity: 0;
  animation: markerPulse 2.5s ease-out infinite;
}

@keyframes markerPulse {
  0% { transform: scale(1); opacity: 0.5; }
  100% { transform: scale(3); opacity: 0; }
}

.timeline-content {
  padding: 2.5rem;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--bg-card);
  transition: all 0.5s var(--ease-out-expo);
}

.timeline-content:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.entry-phase {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--accent);
  margin-bottom: 1rem;
}

.entry-title {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.entry-description {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.5rem;
  max-width: 600px;
}

.entry-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.tag {
  padding: 0.35rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 30px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  transition: all 0.3s;
}

.tag:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.entry-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  transition: all 0.3s;
}

.entry-link svg {
  width: 16px;
  height: 16px;
  transition: transform 0.3s var(--ease-out-expo);
}

.entry-link:hover svg {
  transform: translate(3px, -3px);
}

.entry-status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-secondary);
}

.status-pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-secondary);
  animation: pulse-dot 2s ease-in-out infinite;
}

.active-pulse {
  background: var(--accent);
  animation: pulse-dot 1.5s ease-in-out infinite;
}

/* Signal (Contact) Section */
#signal {
  text-align: center;
}

.signal-heading {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.signal-sub {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 550px;
  margin: 0 auto 3rem;
}

.signal-actions {
  margin-bottom: 4rem;
}

.signal-coordinates {
  display: flex;
  justify-content: center;
  gap: 4rem;
}

.coord-item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.coord-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  color: var(--text-muted);
}

.coord-value {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Footer */
footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 3rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.footer-line {
  flex: 1;
  height: 1px;
  background: var(--border);
  margin: 0 2rem;
}

.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

/* Reveal Animations */
.reveal-text,
.reveal-up,
.reveal-left,
.reveal-right {
  opacity: 0;
  transition: all 1s var(--ease-out-expo);
  transition-delay: var(--delay, 0s);
}

.reveal-text { transform: translateY(40px); }
.reveal-up { transform: translateY(60px); }
.reveal-left { transform: translateX(-60px); }
.reveal-right { transform: translateX(60px); }

.reveal-text.revealed,
.reveal-up.revealed,
.reveal-left.revealed,
.reveal-right.revealed {
  opacity: 1;
  transform: translate(0);
}

/* Responsive */
@media (max-width: 900px) {
  .vision-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .signal-coordinates {
    flex-direction: column;
    gap: 2rem;
  }

  .nav-links {
    display: none;
  }

  .nav-status {
    display: none;
  }

  #nav {
    padding: 1.25rem 1.5rem;
  }

  .section-container {
    padding: 6rem 1.5rem;
  }

  .timeline {
    padding-left: 40px;
  }

  .timeline-line {
    left: 10px;
  }

  .timeline-marker {
    left: -38px;
  }

  .timeline-entry::before {
    display: none;
  }

  .timeline-content {
    padding: 1.5rem;
  }

  .footer-content {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .footer-line {
    display: none;
  }
}

@media (max-width: 600px) {
  .hero-title {
    font-size: clamp(3rem, 15vw, 5rem);
  }

  .cta-button {
    padding: 0.85rem 1.5rem;
    font-size: 0.7rem;
  }
}

/* ============================================
   Cube Scene & Audio Controls
   ============================================ */

/* Cube Container — sits behind hero text */
#cube-container {
  position: absolute;
  inset: 0;
  z-index: 1;
  cursor: grab;
}

#cube-container:active {
  cursor: grabbing;
}

#cube-container canvas {
  display: block;
}

/* Hero content sits above cube */
.hero-content {
  pointer-events: none;
  z-index: 3;
  position: relative;
  width: 100%;
}

.hero-content .cta-button,
.hero-content a {
  pointer-events: auto;
}

/* Interaction Hint */
.hero-interaction-hint {
  margin-top: 1.5rem;
  opacity: 0;
  animation: fadeInUp 1s var(--ease-out-expo) 2s forwards;
}

.hint-text {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.3em;
  color: var(--text-muted);
  opacity: 0.6;
  animation: hintPulse 3s ease-in-out infinite 3s;
}

@keyframes hintPulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 0.2; }
}

/* Audio Toggle Button */
.audio-toggle {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 101;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  background: rgba(10, 10, 15, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  border-radius: 50px;
  cursor: pointer;
  transition: all 0.3s var(--ease-out-expo);
  color: var(--text-secondary);
}

.audio-toggle:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  background: rgba(15, 15, 24, 0.9);
}

.audio-toggle.active {
  border-color: var(--accent);
}

.audio-toggle.active .audio-icon {
  color: var(--accent);
}

.audio-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.audio-label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
}

/* Mobile adjustments for audio */
@media (max-width: 900px) {
  .audio-toggle {
    bottom: 1rem;
    right: 1rem;
    padding: 0.5rem 0.75rem;
  }

  .audio-label {
    display: none;
  }

  .hero-interaction-hint {
    display: none;
  }
}