/* ==========================================================================
   AI ATLAS — UI Components & Interactive Modules
   ========================================================================== */

/* 1. Live AI News Ticker Banner */
.news-ticker-bar {
  background: linear-gradient(90deg, rgba(8, 12, 20, 0.95), rgba(15, 23, 42, 0.95));
  border-bottom: 1px solid var(--border-subtle);
  padding: 8px 0;
  font-size: 0.85rem;
  position: relative;
  z-index: 40;
}

[data-theme="light"] .news-ticker-bar {
  background: linear-gradient(90deg, #eef7f5, #f8fbfb);
}

.news-ticker-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.news-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 242, 213, 0.15);
  color: var(--accent-cyan);
  border: 1px solid var(--border-accent);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 800;
  white-space: nowrap;
  letter-spacing: 0.05em;
  font-family: var(--font-mono);
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-cyan);
  animation: pulse-glow 1.8s infinite;
}

.news-ticker-content {
  flex: 1;
  overflow: hidden;
  white-space: nowrap;
  position: relative;
}

.news-item {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition);
}

.news-item:hover {
  color: var(--accent-cyan);
}

.news-category-tag {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.7rem;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
}

/* 2. Glassmorphic Navigation Bar */
nav.site-nav {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--border-subtle);
  transition: var(--transition);
}

.nav-container {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.3rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  text-decoration: none;
  flex-shrink: 0;
  white-space: nowrap;
}

.brand-logo .brand-highlight {
  color: var(--accent-cyan);
  background: linear-gradient(135deg, var(--accent-cyan), #6366f1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-badge {
  font-size: 0.65rem;
  font-weight: 700;
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-indigo);
  border: 1px solid rgba(99, 102, 241, 0.3);
  padding: 2px 7px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 3px;
  flex-wrap: nowrap;
  white-space: nowrap;
}

.nav-link {
  color: var(--text-secondary);
  font-size: 0.84rem;
  font-weight: 600;
  padding: 7px 10px;
  border-radius: var(--radius-md);
  transition: var(--transition);
  white-space: nowrap;
  flex-shrink: 0;
  line-height: 1.2;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
  background: var(--bg-surface);
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  white-space: nowrap;
}

.lang-switch-group {
  display: inline-flex;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 3px;
}

.lang-btn {
  background: transparent;
  border: 0;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 5px 9px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-mono);
}

.lang-btn.active {
  background: var(--accent-cyan);
  color: #080c14;
  box-shadow: 0 2px 8px var(--accent-teal-glow);
}

.theme-toggle-btn {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1.1rem;
}

.theme-toggle-btn:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* 3. Realtime Visitor Analytics Bar (Strict Single-Line Horizontal Layout) */
.visitor-stats-bar {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 12px 20px;
  margin-top: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  overflow-x: auto;
  scrollbar-width: none;
  width: 100%;
}

.visitor-stats-bar::-webkit-scrollbar {
  display: none;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1 1 0;
  min-width: 0;
  white-space: nowrap;
}

.stat-icon {
  width: 38px;
  height: 38px;
  min-width: 38px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  display: grid;
  place-items: center;
  font-size: 1.15rem;
  flex-shrink: 0;
}

.stat-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.stat-label {
  font-size: 0.68rem;
  color: var(--text-muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.stat-value {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-primary);
  font-family: var(--font-mono);
  display: flex;
  align-items: center;
  gap: 4px;
  white-space: nowrap;
}

.stat-flag {
  font-size: 1.25rem;
}

/* 4. Hero Section */
.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
  padding: 50px 0 40px;
}

.hero-content h1 {
  margin: 16px 0 20px;
}

.hero-content h1 em {
  font-style: normal;
  color: var(--accent-cyan);
  background: linear-gradient(135deg, var(--accent-cyan), #38bdf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-lead {
  font-size: 1.15rem;
  line-height: 1.75;
  color: var(--text-secondary);
  max-width: 640px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-md);
  padding: 13px 22px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), #059683);
  color: #041014;
  box-shadow: 0 4px 20px var(--accent-teal-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 242, 213, 0.4);
  filter: brightness(1.1);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-subtle);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

/* Neural Canvas Visualizer Orb */
.neural-orb-container {
  width: 100%;
  height: 420px;
  border-radius: var(--radius-xl);
  background: radial-gradient(circle at center, rgba(14, 28, 48, 0.9), rgba(6, 10, 18, 0.98));
  border: 1px solid var(--border-subtle);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  display: grid;
  place-items: center;
  transition: var(--transition);
}

[data-theme="light"] .neural-orb-container {
  background: radial-gradient(circle at center, #ffffff, #e6f4f2 85%);
  border: 1px solid rgba(15, 70, 67, 0.18);
  box-shadow: 0 16px 45px rgba(15, 70, 67, 0.1), 0 0 35px rgba(8, 125, 117, 0.08);
}

#neural-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.orb-chip {
  position: absolute;
  background: rgba(16, 24, 40, 0.88);
  border: 1px solid rgba(0, 242, 213, 0.35);
  color: #f0f6fc;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.45);
  z-index: 5;
  transition: var(--transition);
  font-family: var(--font-mono);
  user-select: none;
}

[data-theme="light"] .orb-chip {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(8, 125, 117, 0.3);
  color: #0c1e24;
  box-shadow: 0 6px 20px rgba(15, 70, 67, 0.12);
}

.orb-chip:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  transform: scale(1.06);
  box-shadow: 0 8px 24px rgba(0, 242, 213, 0.3);
}

[data-theme="light"] .orb-chip:hover {
  border-color: var(--accent-teal);
  color: var(--accent-teal);
  box-shadow: 0 8px 24px rgba(8, 125, 117, 0.25);
}

.orb-chip.c1 { top: 28px; right: 28px; }
.orb-chip.c2 { bottom: 32px; left: 28px; }
.orb-chip.c3 { bottom: 64px; right: 36px; }
.orb-chip.c4 { top: 40px; left: 32px; }

/* 5. Core Concept Cards */
.concept-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 26px;
  transition: var(--transition);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
  opacity: 0;
  transition: var(--transition);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

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

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(0, 242, 213, 0.1);
  border: 1px solid rgba(0, 242, 213, 0.2);
  display: grid;
  place-items: center;
  font-size: 1.4rem;
  margin-bottom: 18px;
}

.card h3 {
  margin-bottom: 10px;
}

.card p {
  font-size: 0.95rem;
  line-height: 1.65;
  flex: 1;
}

/* 6. Model Explorer & Intelligence Matrix */
.panel {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(16px);
}

.explorer-toolbar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.search-input-wrap {
  flex: 1;
  min-width: 280px;
  position: relative;
}

.search-input-wrap input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px 16px 12px 42px;
  color: var(--text-primary);
  transition: var(--transition);
}

.search-input-wrap input:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px var(--accent-teal-glow);
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1rem;
}

.filter-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.filter-select {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  padding: 11px 14px;
  cursor: pointer;
  transition: var(--transition);
}

.filter-select:focus {
  outline: none;
  border-color: var(--accent-cyan);
}

.view-toggle {
  display: flex;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 3px;
}

.view-btn {
  background: transparent;
  border: 0;
  color: var(--text-muted);
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  transition: var(--transition);
}

.view-btn.active {
  background: var(--bg-card);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

/* Model Grid View Cards */
.models-grid-layout {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

.model-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.model-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-highlight);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.model-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 12px;
}

.model-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
}

.model-provider {
  font-size: 0.8rem;
  color: var(--accent-cyan);
  font-weight: 700;
  font-family: var(--font-mono);
}

.model-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  background: rgba(99, 102, 241, 0.15);
  color: var(--accent-indigo);
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.model-card-body {
  margin: 12px 0;
  font-size: 0.9rem;
}

.model-metrics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  background: var(--bg-input);
  padding: 12px;
  border-radius: var(--radius-md);
  margin: 14px 0;
  border: 1px solid var(--border-subtle);
}

.metric-box {
  display: flex;
  flex-direction: column;
}

.metric-name {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-family: var(--font-mono);
}

.metric-val {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-primary);
}

.model-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
}

/* Model Table View */
.table-responsive {
  width: 100%;
  overflow-x: auto;
}

table.models-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

table.models-table th {
  text-align: left;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
}

table.models-table td {
  padding: 16px;
  border-bottom: 1px solid var(--border-subtle);
  vertical-align: middle;
}

table.models-table tr:hover td {
  background: var(--bg-surface);
}

.pill-tag {
  display: inline-block;
  padding: 4px 9px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  font-family: var(--font-mono);
}

.pill-cyan { background: rgba(0, 242, 213, 0.12); color: var(--accent-cyan); border: 1px solid var(--border-accent); }
.pill-purple { background: rgba(168, 85, 247, 0.12); color: var(--accent-purple); border: 1px solid rgba(168, 85, 247, 0.3); }
.pill-amber { background: rgba(245, 158, 11, 0.12); color: var(--accent-amber); border: 1px solid rgba(245, 158, 11, 0.3); }
.pill-emerald { background: rgba(16, 185, 129, 0.12); color: var(--accent-emerald); border: 1px solid rgba(16, 185, 129, 0.3); }

/* 7. Draggable & Interactive Timeline (Horizontal Axis Ribbon & Board View) */
.timeline-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.timeline-filter-tabs {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.timeline-tab-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}

.timeline-tab-btn.active, .timeline-tab-btn:hover {
  background: var(--accent-cyan);
  color: #080c14;
  border-color: var(--accent-cyan);
  box-shadow: 0 2px 10px var(--accent-teal-glow);
}

/* Decade Scrubber Bar */
.decade-scrubber-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 6px 14px;
  margin-bottom: 24px;
  overflow-x: auto;
}

.decade-btn {
  background: transparent;
  border: 0;
  color: var(--text-muted);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition);
  font-family: var(--font-mono);
}

.decade-btn:hover, .decade-btn.active {
  background: var(--bg-card);
  color: var(--accent-cyan);
  box-shadow: var(--shadow-sm);
}

/* Timeline Viewport Wrapper */
.timeline-viewport-wrapper {
  position: relative;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 24px 16px;
  overflow: hidden;
}

.pan-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-accent);
  color: var(--text-primary);
  font-size: 1.2rem;
  font-weight: 900;
  display: grid;
  place-items: center;
  cursor: pointer;
  z-index: 25;
  transition: var(--transition);
  box-shadow: var(--shadow-lg);
}

.pan-nav-btn:hover {
  background: var(--accent-cyan);
  color: #080c14;
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 0 25px var(--accent-teal-glow);
}

.pan-nav-btn.prev { left: 16px; }
.pan-nav-btn.next { right: 16px; }

/* Horizontal Ribbon Scroll Container */
.timeline-ribbon-viewport {
  overflow-x: auto;
  cursor: grab;
  user-select: none;
  scroll-behavior: smooth;
  padding: 20px 40px;
  -webkit-overflow-scrolling: touch;
}

.timeline-ribbon-viewport:active {
  cursor: grabbing;
}

.timeline-ribbon-track {
  display: flex;
  position: relative;
  min-width: max-content;
  padding: 10px 20px;
}

/* Alternating Ribbon Column */
.ribbon-column {
  width: 330px;
  min-width: 330px;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  padding: 0 14px;
}

/* Card placed on top */
.ribbon-slot-top {
  min-height: 220px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  width: 100%;
}

/* Card placed on bottom */
.ribbon-slot-bottom {
  min-height: 220px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-items: center;
  width: 100%;
}

/* Ribbon Card */
.ribbon-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  width: 100%;
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(12px);
  transition: var(--transition);
  position: relative;
  cursor: pointer;
}

.ribbon-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-cyan);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), 0 0 25px var(--accent-teal-glow);
}

.ribbon-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.ribbon-year {
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  display: flex;
  align-items: center;
  gap: 6px;
}

.ribbon-title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
  line-height: 1.35;
}

.ribbon-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.ribbon-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px solid var(--border-subtle);
}

/* Connector Stems & Directional Arrows (Like Image 2) */
.stem-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  margin-top: 4px;
}

.stem-line {
  width: 2px;
  height: 32px;
  background: linear-gradient(180deg, var(--border-accent), var(--accent-cyan));
}

.stem-arrow-down {
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 8px solid var(--accent-cyan);
}

.stem-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  margin-bottom: 4px;
}

.stem-arrow-up {
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-bottom: 8px solid var(--accent-cyan);
}

/* Central Continuous Axis Ribbon Bar */
.ribbon-axis-bar {
  width: 100%;
  height: 48px;
  display: flex;
  align-items: center;
  position: relative;
  margin: 10px 0;
}

.axis-spine-line {
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  height: 8px;
  background: linear-gradient(90deg, #059683, #00f2d5, #6366f1, #a855f7, #38bdf8);
  border-radius: var(--radius-full);
  box-shadow: 0 0 16px rgba(0, 242, 213, 0.4);
  z-index: 1;
}

.axis-node {
  position: relative;
  z-index: 2;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 3px solid var(--accent-cyan);
  box-shadow: 0 0 12px var(--accent-cyan);
  cursor: pointer;
  transition: var(--transition);
  display: grid;
  place-items: center;
}

.axis-node:hover {
  transform: scale(1.4);
  border-color: #ffffff;
  background: var(--accent-cyan);
  box-shadow: 0 0 20px var(--accent-cyan);
}

.axis-node-inner {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-cyan);
}

/* List / Board Alternative View */
.timeline-board {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding: 10px 0;
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 20px;
  align-items: center;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  user-select: none;
}

.timeline-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.timeline-year-badge {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  min-width: 90px;
  text-align: right;
  padding-right: 18px;
  border-right: 2px solid var(--border-subtle);
}

.timeline-main-info h3 {
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.timeline-tag {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
}

.timeline-details {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--border-subtle);
  color: var(--accent-teal);
  font-size: 0.9rem;
}

/* 8. Comparison Floating Bottom Drawer */
.compare-drawer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 45;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border-top: 2px solid var(--accent-cyan);
  box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.6);
  transform: translateY(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  max-height: 80vh;
  overflow-y: auto;
}

.compare-drawer.open {
  transform: translateY(0);
}

.compare-drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.compare-drawer-body {
  padding: 24px;
}

.compare-matrix-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.compare-column {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px;
}

/* 9. AI Tech Stack Layers */
.stack-container {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.stack-layer {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 22px 28px;
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 24px;
  align-items: center;
  transition: var(--transition);
}

.stack-layer:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  transform: translateX(6px);
}

.layer-heading {
  display: flex;
  align-items: center;
  gap: 12px;
}

.layer-num {
  font-size: 1.2rem;
  font-weight: 900;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
}

/* 10. Prompt Engineering Hub & Behavior Sandbox */
.prompt-hub-nav {
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
  overflow-x: auto;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border-subtle);
}

.prompt-hub-tab {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 10px 18px;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  font-size: 0.88rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  border-bottom: 2px solid transparent;
}

.prompt-hub-tab.active, .prompt-hub-tab:hover {
  background: var(--bg-surface);
  color: var(--text-primary);
  border-color: var(--border-accent);
  border-bottom-color: var(--accent-cyan);
}

/* 5-Pillar Anatomy Grid */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.pillar-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 18px;
  transition: var(--transition);
}

.pillar-card:hover {
  border-color: var(--border-highlight);
  transform: translateY(-3px);
  background: var(--bg-card-hover);
}

.pillar-num {
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 6px;
}

.pillar-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.pillar-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Interactive Prompt Builder */
.builder-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  margin-top: 16px;
}

.builder-inputs-box {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.builder-field label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  margin-bottom: 5px;
}

.builder-field input, .builder-field textarea {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  color: var(--text-primary);
  font-size: 0.88rem;
  transition: var(--transition);
}

.builder-field input:focus, .builder-field textarea:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px var(--accent-teal-glow);
}

.builder-preview-box {
  background: #05080e;
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: inset 0 0 25px rgba(0, 0, 0, 0.8);
}

.builder-output-text {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.65;
  color: #00f2d5;
  white-space: pre-wrap;
  flex: 1;
  overflow-y: auto;
  max-height: 380px;
  padding-right: 8px;
}

.prompt-score-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Before vs After Comparison Grid */
.scenario-filter-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin: 14px 0 20px;
}

.scenario-pill-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.scenario-pill-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-highlight);
  background: var(--bg-card);
}

.scenario-pill-btn.active {
  background: var(--accent-cyan);
  color: #080c14;
  border-color: var(--accent-cyan);
  box-shadow: 0 2px 10px var(--accent-teal-glow);
  font-weight: 700;
}

.comparison-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 20px;
}

.compare-case-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: var(--transition);
}

.compare-case-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.bad-prompt-box {
  background: rgba(244, 63, 94, 0.08);
  border: 1px solid rgba(244, 63, 94, 0.25);
  border-radius: var(--radius-md);
  padding: 12px;
  font-size: 0.85rem;
}

.good-prompt-box {
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-md);
  padding: 12px;
  font-size: 0.85rem;
}

/* Methodology Steps List */
.methodology-step {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 18px;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 18px 22px;
  margin-bottom: 14px;
  transition: var(--transition);
}

.methodology-step:hover {
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
  transform: translateX(4px);
}

.step-badge {
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  display: grid;
  place-items: center;
  background: rgba(0, 242, 213, 0.1);
  border-radius: var(--radius-md);
  height: 54px;
}

.prompt-lab-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
}

.lab-terminal {
  background: #05080e;
  border: 1px solid rgba(0, 242, 213, 0.25);
  border-radius: var(--radius-lg);
  padding: 22px;
  font-family: var(--font-mono);
  color: #00f2d5;
  font-size: 0.88rem;
  line-height: 1.6;
  min-height: 320px;
  overflow-y: auto;
  box-shadow: inset 0 0 20px rgba(0, 0, 0, 0.8);
}

.slider-group {
  margin-bottom: 20px;
}

.slider-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 6px;
  font-size: 0.85rem;
  font-weight: 700;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent-cyan);
}

/* 11. Accessible Modal Dialogs */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(4, 8, 15, 0.75);
  backdrop-filter: blur(12px);
  display: none;
  place-items: center;
  z-index: 60;
  padding: 20px;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.modal-overlay.open {
  display: grid;
  opacity: 1;
}

.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 32px;
  max-width: 680px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  position: relative;
  animation: modal-pop 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: var(--transition);
}

.modal-close-btn:hover {
  background: var(--accent-rose);
  color: #fff;
  border-color: var(--accent-rose);
}

/* 12. Footer */
footer.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: 48px 0 32px;
  margin-top: 80px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.security-seal {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  color: var(--accent-emerald);
  padding: 6px 12px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-family: var(--font-mono);
}

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-grid { grid-template-columns: 1fr; }
  .prompt-lab-grid { grid-template-columns: 1fr; }
  .stack-layer { grid-template-columns: 1fr; gap: 12px; }
  .nav-links { display: none; }
}

@media (max-width: 640px) {
  .wrap { padding-left: 16px; padding-right: 16px; }
  .section-head { flex-direction: column; align-items: flex-start; }
  .timeline-card { grid-template-columns: 1fr; gap: 12px; }
  .timeline-year-badge { border-right: 0; text-align: left; padding-right: 0; }
  .explorer-toolbar { flex-direction: column; align-items: stretch; }
  .neural-orb-container { height: 320px; }
}