/* =============================================
   Human Cognition AI - Global Styles
   Theme: Light (#F8FAFC bg, #F97316 accent)
   ============================================= */

/* --- Base --- */
body {
  font-family: 'Inter', system-ui, sans-serif;
  background: #F8FAFC;
  color: #0A0F1A;
}
h1, h2, h3, h4, h5 {
  font-family: Georgia, Cambria, 'Times New Roman', serif;
}

/* --- Scroll Progress Bar --- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, #F97316, #FBBF24, #F97316);
  z-index: 9999;
  transition: width 0.1s linear;
  border-radius: 0 2px 2px 0;
}

/* --- Glass Morphism Nav --- */
.nav-glass {
  background: rgba(248, 250, 252, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  transition: box-shadow 0.3s ease, background 0.3s ease;
}
.nav-glass.scrolled {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  background: rgba(248, 250, 252, 0.95);
}

/* --- Nav Link Hover Underline --- */
.nav-link {
  position: relative;
  transition: color 0.2s ease;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: #F97316;
  border-radius: 1px;
  transition: width 0.3s ease;
}
.nav-link:hover::after {
  width: 100%;
}

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #F1F5F9; }
::-webkit-scrollbar-thumb { background: #CBD5E1; border-radius: 4px; }

/* --- Animated Gradient Blobs --- */
@keyframes blobFloat1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -40px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}
@keyframes blobFloat2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(-40px, 30px) scale(1.1); }
  66% { transform: translate(25px, -15px) scale(0.9); }
}
@keyframes blobFloat3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(20px, 25px) scale(0.95); }
  66% { transform: translate(-35px, -20px) scale(1.05); }
}

.gradient-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  pointer-events: none;
}
.gradient-blob-1 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, #F97316 0%, transparent 70%);
  animation: blobFloat1 12s ease-in-out infinite;
}
.gradient-blob-2 {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, #FBBF24 0%, transparent 70%);
  animation: blobFloat2 15s ease-in-out infinite;
}
.gradient-blob-3 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, #FB923C 0%, transparent 70%);
  animation: blobFloat3 18s ease-in-out infinite;
}

/* --- Button Hover Effects --- */
.btn-primary {
  transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(249, 115, 22, 0.2);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(249, 115, 22, 0.35);
}
.btn-primary:active {
  transform: translateY(0);
}

.btn-outline {
  transition: all 0.3s ease;
}
.btn-outline:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(249, 115, 22, 0.15);
}

/* --- Card Hover Lift --- */
.card-lift {
  transition: all 0.3s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}
.card-lift:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08), 0 4px 8px rgba(0, 0, 0, 0.04);
}

/* --- Layered Shadows --- */
.shadow-layered {
  box-shadow:
    0 1px 2px rgba(0, 0, 0, 0.03),
    0 4px 8px rgba(0, 0, 0, 0.04),
    0 12px 32px rgba(0, 0, 0, 0.06);
}
.shadow-layered-lg {
  box-shadow:
    0 2px 4px rgba(0, 0, 0, 0.02),
    0 8px 16px rgba(0, 0, 0, 0.04),
    0 24px 48px rgba(0, 0, 0, 0.08);
}

/* --- Scroll Reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-stagger-1 { transition-delay: 0.1s; }
.reveal-stagger-2 { transition-delay: 0.2s; }
.reveal-stagger-3 { transition-delay: 0.3s; }
.reveal-stagger-4 { transition-delay: 0.4s; }

/* --- Section Dividers --- */
.section-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, #E2E8F0 20%, #CBD5E1 50%, #E2E8F0 80%, transparent);
}

/* --- Counter Animation --- */
.counter-value {
  display: inline-block;
  font-variant-numeric: tabular-nums;
}

/* --- Architecture Layer Accordion --- */
.arch-layer {
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}
.arch-layer:hover {
  box-shadow: 0 1px 6px rgba(0,0,0,0.08);
}
.arch-layer-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}
.arch-layer.expanded .arch-layer-content {
  max-height: 400px;
  padding-top: 12px;
}

/* --- Module Tiles --- */
.module-tile {
  width: 64px;
  height: 64px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-weight: 600;
  font-size: 0.875rem;
  position: relative;
  box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}
.module-tile:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}
.module-tile.active {
  outline: 2px solid #F97316;
  outline-offset: 2px;
}
.module-tile .tile-abbr {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1;
}
.module-tile .tile-num {
  font-size: 0.6rem;
  opacity: 0.7;
  line-height: 1;
  margin-bottom: 2px;
}

/* Tile color tiers */
.tile-foundation { background: #DBEAFE; color: #1E40AF; }
.tile-processing { background: #DCFCE7; color: #166534; }
.tile-motivation { background: #FEF9C3; color: #854D0E; }
.tile-interface  { background: #FEF3C7; color: #92400E; }
.tile-advanced   { background: #FFEDD5; color: #9A3412; }

/* --- Code Syntax --- */
.code-keyword { color: #2563EB; }
.code-string  { color: #F97316; }
.code-comment { color: #9CA3AF; }
.code-func    { color: #0A0F1A; font-weight: 500; }
.code-number  { color: #7C3AED; }

/* --- Comparison Table --- */
.comparison-table th {
  font-family: Georgia, Cambria, serif;
  font-weight: 600;
  font-size: 0.875rem;
}

/* --- Research Citations --- */
.reference {
  padding-left: 2.5rem;
  text-indent: -2.5rem;
}

/* --- BibTeX Popup --- */
.bibtex-popup {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0,0,0,0.4);
  align-items: center;
  justify-content: center;
}
.bibtex-popup.show {
  display: flex;
}

/* --- Mobile Menu --- */
.mobile-menu {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.mobile-menu.open {
  max-height: 400px;
}

/* --- Brain Simulator SVG Animations --- */
@keyframes pulseGlow {
  0%, 100% { filter: brightness(1) drop-shadow(0 0 2px currentColor); }
  50% { filter: brightness(1.4) drop-shadow(0 0 12px currentColor); }
}
@keyframes flowDash {
  to { stroke-dashoffset: -20; }
}
@keyframes moduleActivate {
  0% { transform: scale(1); }
  50% { transform: scale(1.08); }
  100% { transform: scale(1); }
}

.sim-module {
  cursor: pointer;
  transition: all 0.3s ease;
}
.sim-module:hover {
  filter: brightness(1.15) drop-shadow(0 0 6px rgba(249,115,22,0.4));
}
.sim-module.active-module {
  animation: moduleActivate 0.4s ease;
}
.sim-module .idle-glow {
  opacity: 0.4;
  transition: opacity 0.3s ease;
}
.sim-module.lit .idle-glow {
  opacity: 1;
}
.sim-module.lit {
  filter: brightness(1.3) drop-shadow(0 0 14px currentColor);
}

/* --- Flow Arrows --- */
.flow-arrow {
  stroke-dasharray: 8 4;
  stroke-dashoffset: 0;
  opacity: 0;
  transition: opacity 0.3s ease;
}
.flow-arrow.active-flow {
  opacity: 1;
  animation: flowDash 0.6s linear infinite;
}

/* --- Simulator Log --- */
.sim-log-entry {
  opacity: 0;
  transform: translateY(8px);
  transition: all 0.3s ease;
}
.sim-log-entry.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Inspector Panel --- */
.inspector-panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease, opacity 0.3s ease;
  opacity: 0;
}
.inspector-panel.open {
  max-height: 600px;
  opacity: 1;
}

/* --- Scenario Cards --- */
.scenario-card {
  cursor: pointer;
  transition: all 0.2s ease;
  border: 2px solid transparent;
}
.scenario-card:hover {
  border-color: #F97316;
  box-shadow: 0 2px 8px rgba(249,115,22,0.15);
}
.scenario-card.selected {
  border-color: #F97316;
  background: #FFF7ED;
}

/* --- Range Slider --- */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: #E2E8F0;
  border-radius: 3px;
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #F97316;
  cursor: pointer;
}

/* --- Results Bars --- */
.results-bar {
  height: 8px;
  border-radius: 4px;
  background: #E2E8F0;
  overflow: hidden;
}
.results-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.6s ease;
}

/* --- Demo Page Step Animation --- */
@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
.demo-step {
  opacity: 0;
  transform: translateY(16px);
}
.demo-step.active {
  animation: fadeSlideIn 0.5s ease forwards;
}
.demo-step.completed {
  opacity: 1;
  transform: translateY(0);
}

/* --- Intensity Meter --- */
.intensity-meter {
  height: 12px;
  border-radius: 6px;
  background: #E2E8F0;
  overflow: hidden;
  position: relative;
}
.intensity-meter-fill {
  height: 100%;
  border-radius: 6px;
  transition: width 1s ease;
  background: linear-gradient(90deg, #FBBF24, #F97316, #EF4444);
}

/* --- Pricing Cards --- */
.pricing-card {
  transition: all 0.3s ease;
  border: 2px solid transparent;
}
.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.1);
}
.pricing-card.featured {
  border-color: #F97316;
}

/* --- Feature Cards --- */
.feature-card {
  transition: all 0.2s ease;
}
.feature-card:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

/* --- FAQ Accordion --- */
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.faq-item.open .faq-answer {
  max-height: 300px;
}
.faq-item.open .faq-chevron {
  transform: rotate(180deg);
}
.faq-chevron {
  transition: transform 0.3s ease;
}

/* --- Testimonial Cards --- */
.testimonial-card {
  position: relative;
  transition: all 0.3s ease;
}
.testimonial-card::before {
  content: '\201C';
  position: absolute;
  top: -8px;
  left: 16px;
  font-size: 4rem;
  font-family: Georgia, serif;
  color: #F97316;
  opacity: 0.15;
  line-height: 1;
}
.testimonial-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

/* --- Hero Brain Diagram Enhanced --- */
@keyframes layerPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 0.6; }
}
.brain-layer-glow {
  animation: layerPulse 3s ease-in-out infinite;
}
.brain-layer-glow:nth-child(2) { animation-delay: 0.5s; }
.brain-layer-glow:nth-child(3) { animation-delay: 1s; }
.brain-layer-glow:nth-child(4) { animation-delay: 1.5s; }
.brain-layer-glow:nth-child(5) { animation-delay: 2s; }

/* --- Footer Products Grid --- */
.product-link {
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.product-link:hover {
  color: #F97316;
  transform: translateX(2px);
}

/* --- Lab Tier Elevated --- */
.lab-tier-card {
  position: relative;
  background: linear-gradient(135deg, #FFF7ED 0%, #FFFBEB 100%);
  border: 2px solid #F97316;
  box-shadow:
    0 0 0 1px rgba(249, 115, 22, 0.1),
    0 4px 16px rgba(249, 115, 22, 0.12),
    0 12px 32px rgba(249, 115, 22, 0.08);
}
.lab-tier-card:hover {
  transform: translateY(-6px);
  box-shadow:
    0 0 0 1px rgba(249, 115, 22, 0.15),
    0 8px 24px rgba(249, 115, 22, 0.2),
    0 20px 48px rgba(249, 115, 22, 0.12);
}