/* ==========================================================================
   LoRA & DoRA Visual Explorer — Glassmorphic Design System
   Light / Dark Mode + Sticky Header + Electric Signal Pathway Simulation
   ========================================================================== */

:root {
  /* Dark Theme (Default) */
  --bg-app: #080C15;
  --bg-glass: rgba(15, 23, 42, 0.75);
  --bg-glass-heavy: rgba(15, 23, 42, 0.90);
  --bg-surface-1: #0F172A;
  --bg-surface-2: #162036;
  --bg-surface-3: #1E293B;
  --bg-input: rgba(9, 13, 22, 0.85);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glass: rgba(255, 255, 255, 0.12);
  --border-medium: rgba(255, 255, 255, 0.18);
  --border-accent: #6366F1;

  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;

  /* Theme Accents */
  --lora-color: #38BDF8;
  --lora-bg: rgba(56, 189, 248, 0.14);
  --dora-color: #C084FC;
  --dora-bg: rgba(192, 132, 252, 0.14);
  --base-color: #94A3B8;
  --cpt-color: #34D399;
  --cpt-bg: rgba(52, 211, 153, 0.14);
  --sft-color: #F472B6;
  --sft-bg: rgba(244, 114, 182, 0.14);
  
  --accent-indigo: #6366F1;
  --accent-emerald: #10B981;
  --accent-amber: #F59E0B;
  --accent-rose: #FB7185;

  --shadow-glass: 0 8px 32px 0 rgba(0, 0, 0, 0.45);
  --shadow-glow-indigo: 0 0 24px rgba(99, 102, 241, 0.35);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
}

/* ==========================================================================
   View Mode Switcher (Header Tabs: Full Scroll vs Step-by-Step)
   ========================================================================== */
.view-mode-toggle-group {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg-surface-2);
  padding: 4px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
}

.view-mode-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 6px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.view-mode-btn:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

.view-mode-btn.active-mode {
  background: linear-gradient(135deg, #4F46E5 0%, #0284C7 100%);
  color: #FFFFFF;
  box-shadow: 0 2px 10px rgba(79, 70, 229, 0.35);
}

/* ==========================================================================
   Unified Stage Navigation Ribbon
   ========================================================================== */
.stage-navigation-ribbon {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 0.6rem 0.75rem;
  margin-bottom: 2rem;
  overflow-x: auto;
  gap: 0.5rem;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  position: sticky;
  top: 58px;
  z-index: 90;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.stage-nav-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  flex: 1;
  justify-content: center;
}

.stage-nav-btn:hover {
  background: var(--bg-surface-2);
  color: var(--text-primary);
}

.stage-nav-btn.active-stage-btn {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.18) 0%, rgba(56, 189, 248, 0.18) 100%);
  border-color: #6366F1;
  color: var(--text-primary);
  box-shadow: 0 0 14px rgba(99, 102, 241, 0.3);
}

.stage-nav-num {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--bg-surface-3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
}

.stage-nav-btn.active-stage-btn .stage-nav-num {
  background: #6366F1;
  color: #FFFFFF;
}

/* Mode 1: Full Continuous Scroll Layout */
.app-main-content.scroll-mode {
  display: flex;
  flex-direction: column;
  gap: 2.75rem;
  position: relative;
}

.app-main-content.scroll-mode::before {
  content: '';
  position: absolute;
  top: 100px;
  bottom: 80px;
  left: 24px;
  width: 2px;
  background: linear-gradient(180deg, #6366F1 0%, #38BDF8 35%, #10B981 70%, #F59E0B 100%);
  opacity: 0.45;
  z-index: 0;
}

.app-main-content.scroll-mode .step-section {
  display: flex !important;
  gap: 1.5rem;
  position: relative;
  z-index: 1;
}

.app-main-content.scroll-mode .step-indicator-column {
  display: flex;
}

/* Mode 2: Step-by-Step Guided Card Layout */
.app-main-content.wizard-mode {
  display: flex;
  flex-direction: column;
  position: relative;
}

.app-main-content.wizard-mode::before {
  display: none !important;
}

.app-main-content.wizard-mode .step-section {
  display: none;
  animation: fadeInStage 0.25s ease;
}

.app-main-content.wizard-mode .step-section.active-pane {
  display: flex !important;
  gap: 1.5rem;
}

@keyframes fadeInStage {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

.stage-nav-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Light Theme Variables */
body.light-mode {
  --bg-app: #F1F5F9;
  --bg-glass: rgba(255, 255, 255, 0.82);
  --bg-glass-heavy: rgba(255, 255, 255, 0.94);
  --bg-surface-1: #FFFFFF;
  --bg-surface-2: #F8FAFC;
  --bg-surface-3: #E2E8F0;
  --bg-input: rgba(255, 255, 255, 0.92);

  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-glass: rgba(255, 255, 255, 0.8);
  --border-medium: rgba(0, 0, 0, 0.12);

  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #64748B;

  --lora-color: #0284C7;
  --lora-bg: rgba(2, 132, 199, 0.12);
  --dora-color: #7E22CE;
  --dora-bg: rgba(126, 34, 206, 0.12);
  --base-color: #64748B;
  --cpt-color: #059669;
  --cpt-bg: rgba(5, 150, 105, 0.12);
  --sft-color: #DB2777;
  --sft-bg: rgba(219, 39, 119, 0.12);

  --shadow-glass: 0 8px 30px 0 rgba(0, 0, 0, 0.08);
  --shadow-glow-indigo: 0 0 20px rgba(99, 102, 241, 0.2);
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-primary);
  line-height: 1.55;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
  -webkit-font-smoothing: antialiased;
}

/* Background Flow Particles Canvas */
#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
}

.app-container {
  max-width: 1440px;
  width: 95vw;
  margin: 0 auto;
  padding: 1.25rem 1.75rem 6rem 1.75rem;
  position: relative;
  z-index: 1;
}

/* Glassmorphism Card Style */
.glass-panel {
  background: var(--bg-glass);
  backdrop-filter: blur(18px) saturate(180%);
  -webkit-backdrop-filter: blur(18px) saturate(180%);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glass);
  transition: all 0.3s ease;
}

/* ==========================================================================
   Full-Width Site Header (Identical across Landing, Index, and Wizard)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  width: 100%;
  padding: 0.8rem 2rem;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 100;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(3, 5, 9, 0.75);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.3s ease, border-color 0.3s ease;
}
body.light-mode .site-header {
  background: rgba(255, 255, 255, 0.82);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.header-inner {
  max-width: 1440px;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  text-decoration: none;
  transition: opacity 0.2s ease;
  display: inline-flex;
  align-items: center;
}
.brand-title:hover {
  opacity: 0.85;
}

.header-nav-tabs {
  display: flex;
  gap: 0.55rem;
  align-items: center;
}

.btn-header-tab {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 500;
  padding: 7px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all 0.2s ease;
  cursor: pointer;
  white-space: nowrap;
}
body.light-mode .btn-header-tab {
  background: rgba(0, 0, 0, 0.04);
  border-color: rgba(0, 0, 0, 0.08);
  color: var(--text-secondary);
}
.btn-header-tab:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}
body.light-mode .btn-header-tab:hover {
  background: rgba(0, 0, 0, 0.08);
}
.btn-header-tab.active {
  background: linear-gradient(135deg, #4F46E5 0%, #0284C7 100%);
  color: #FFFFFF;
  font-weight: 600;
  box-shadow: 0 2px 14px rgba(79, 70, 229, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.15);
}
.btn-header-tab.active:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(79, 70, 229, 0.5);
}

/* Theme Toggle Button */
.theme-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 6px 13px;
  border-radius: 999px;
  background: var(--bg-surface-2);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
  background: var(--bg-surface-3);
  border-color: var(--border-strong);
  transform: translateY(-1px);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background: linear-gradient(135deg, #6366F1 0%, #06B6D4 100%);
  color: #FFF;
  border: none;
  padding: 0.5rem 1.1rem;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-glow-indigo);
  transition: all 0.2s ease;
}

.btn-primary:hover {
  transform: translateY(-1px);
  filter: brightness(1.1);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--bg-surface-2);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background: var(--bg-surface-3);
  border-color: var(--border-medium);
}

/* ==========================================================================
   Vertical Step-by-Step Stepper Timeline
   ========================================================================== */
.vertical-stepper {
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
  position: relative;
}

/* Connecting Timeline Track Line */
.vertical-stepper::before {
  content: '';
  position: absolute;
  top: 35px;
  bottom: 60px;
  left: 24px;
  width: 2px;
  background: linear-gradient(180deg, #6366F1 0%, #38BDF8 50%, #10B981 100%);
  opacity: 0.4;
  z-index: 0;
}

/* Step Card Container */
.step-section {
  display: flex;
  gap: 1.5rem;
  position: relative;
  z-index: 1;
}

.step-indicator-column {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
}

.step-number-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--bg-surface-1);
  border: 2px solid #6366F1;
  color: #FFF;
  font-size: 1rem;
  font-weight: 800;
  font-family: var(--font-mono);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px rgba(99, 102, 241, 0.4);
}

body.light-mode .step-number-circle {
  color: #6366F1;
  background: #FFF;
}

.step-content-card {
  flex: 1;
  padding: 1.85rem 2.25rem;
}

.step-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
  flex-wrap: wrap;
  gap: 1rem;
}

.step-header-left {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.step-eyebrow {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--lora-color);
}

.step-main-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Layman Intuition Box */
.layman-intuition-banner {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12) 0%, rgba(56, 189, 248, 0.08) 100%);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: var(--radius-md);
  padding: 0.9rem 1.15rem;
  margin-bottom: 1.25rem;
  font-size: 0.86rem;
  line-height: 1.6;
}

.layman-intuition-banner strong {
  color: #FFF;
}
body.light-mode .layman-intuition-banner strong {
  color: #0F172A;
}

/* Linear Pill Toggle Switch */
.pill-switch {
  display: inline-flex;
  background: var(--bg-surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 3px;
  gap: 3px;
}

.pill-switch-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 0.45rem 0.95rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: all 0.2s ease;
}

.pill-switch-btn:hover {
  color: var(--text-primary);
}

.pill-switch-btn.active-cpt {
  background: var(--cpt-bg);
  color: var(--cpt-color);
  border: 1px solid rgba(52, 211, 153, 0.4);
}

.pill-switch-btn.active-sft {
  background: var(--sft-bg);
  color: var(--sft-color);
  border: 1px solid rgba(244, 114, 182, 0.4);
}

.pill-switch-btn.active-base {
  background: rgba(148, 163, 184, 0.18);
  color: var(--text-primary);
  border: 1px solid #94A3B8;
}

.pill-switch-btn.active-lora {
  background: var(--lora-bg);
  color: var(--lora-color);
  border: 1px solid var(--lora-color);
}

.pill-switch-btn.active-dora {
  background: var(--dora-bg);
  color: var(--dora-color);
  border: 1px solid var(--dora-color);
}

/* Badges */
.badge-tag {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  border: 1px solid transparent;
}

.badge-tag.cpt { background: var(--cpt-bg); color: var(--cpt-color); border-color: rgba(52, 211, 153, 0.35); }
.badge-tag.sft { background: var(--sft-bg); color: var(--sft-color); border-color: rgba(244, 114, 182, 0.35); }
.badge-tag.lora { background: var(--lora-bg); color: var(--lora-color); border-color: rgba(56, 189, 248, 0.35); }
.badge-tag.dora { background: var(--dora-bg); color: var(--dora-color); border-color: rgba(192, 132, 252, 0.35); }

/* ==========================================================================
   Step 1: Causal Token Stream
   ========================================================================== */
.token-stream-container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  padding: 1.25rem;
  background: var(--bg-input);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.token-causal-node {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.token-chip-box {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.94rem;
  background: var(--bg-surface-2);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  user-select: none;
  transition: all 0.2s ease;
}

.token-chip-box:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.token-chip-box.active-loss {
  background: rgba(16, 185, 129, 0.16);
  border-color: rgba(16, 185, 129, 0.5);
  color: #10B981;
}

body.light-mode .token-chip-box.active-loss {
  color: #047857;
  background: rgba(16, 185, 129, 0.12);
}

.token-chip-box.masked-loss {
  background: rgba(100, 116, 139, 0.12);
  border-color: rgba(100, 116, 139, 0.25);
  color: var(--text-muted);
  opacity: 0.75;
}

.token-chip-box.special-token {
  background: rgba(251, 113, 133, 0.16);
  border-color: rgba(251, 113, 133, 0.45);
  color: #FB7185;
}

.token-chip-box.selected-cursor {
  outline: 2px solid #38BDF8;
  box-shadow: 0 0 18px rgba(56, 189, 248, 0.65);
  transform: scale(1.06);
  z-index: 10;
}

.token-chip-box .badge-loss {
  position: absolute;
  top: -8px;
  right: -6px;
  font-size: 0.6rem;
  font-weight: 700;
  padding: 1px 5px;
  border-radius: var(--radius-full);
  background: #064E3B;
  color: #6EE7B7;
  border: 1px solid #10B981;
}

.token-chip-box.masked-loss .badge-loss {
  background: #334155;
  color: #94A3B8;
  border-color: #475569;
}

.token-chip-box .token-tag-label {
  font-size: 0.62rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-top: 3px;
  opacity: 0.85;
}

.token-arrow-symbol {
  font-size: 1rem;
  color: var(--text-muted);
}

.token-arrow-symbol.active {
  color: var(--accent-emerald);
  font-weight: 700;
}

/* ==========================================================================
   Step 2: Layman Mental Model & Electric Thought Pathway
   ========================================================================== */
.weight-architecture-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 1.25rem;
}

/* SVG Architecture Container */
.svg-diagram-container {
  width: 100%;
  height: 310px;
  background: var(--bg-input);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.svg-diagram-container svg {
  width: 100%;
  height: 100%;
}

/* Animated Electric Current Flow Paths */
.electric-current-path {
  stroke-dasharray: 8, 8;
  animation: electricFlow 1.2s linear infinite;
}

.electric-current-cyan {
  stroke: #38BDF8;
  filter: drop-shadow(0 0 4px #38BDF8);
}

.electric-current-emerald {
  stroke: #10B981;
  filter: drop-shadow(0 0 4px #10B981);
}

.electric-current-amber {
  stroke: #F59E0B;
  filter: drop-shadow(0 0 4px #F59E0B);
}

@keyframes electricFlow {
  from {
    stroke-dashoffset: 32;
  }
  to {
    stroke-dashoffset: 0;
  }
}

/* Pathway Block Interactive Hover Effects */
.path-block-interactive {
  cursor: pointer;
  transition: transform 0.2s ease, filter 0.2s ease;
}

.path-block-interactive:hover {
  filter: brightness(1.2) drop-shadow(0 0 8px rgba(99, 102, 241, 0.7));
}

.path-block-interactive.active-pulse {
  animation: blockPulse 0.8s ease-in-out;
}

@keyframes blockPulse {
  0% { transform: scale(1); filter: brightness(1); }
  50% { transform: scale(1.05); filter: brightness(1.4) drop-shadow(0 0 12px #38BDF8); }
  100% { transform: scale(1); filter: brightness(1); }
}

/* Pathway Inspector Banner */
.pathway-inspector-card {
  background: rgba(99, 102, 241, 0.08);
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.9rem;
  margin-top: 0.6rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  transition: all 0.2s ease;
}

.pathway-inspector-card strong {
  color: #38BDF8;
}

/* ==========================================================================
   2D Matrix Math & Weight Merging Heatmap
   ========================================================================== */
.matrix-math-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-surface-1);
  padding: 0.85rem 1.15rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  margin-bottom: 0.85rem;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.matrix-probe-badge {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: #34D399;
  background: rgba(16, 185, 129, 0.12);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.matrix-math-svg-box {
  width: 100%;
  aspect-ratio: 990 / 310;
  min-height: 310px;
  background: var(--bg-input);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.matrix-math-svg-box svg {
  width: 100%;
  height: 100%;
  display: block;
}

.mat-cell {
  cursor: pointer;
  transition: transform 0.15s ease, filter 0.15s ease;
}

.mat-cell:hover {
  filter: brightness(1.35) drop-shadow(0 0 6px rgba(56, 189, 248, 0.8));
  stroke-width: 1.8;
}

.mat-cell.crosshair-row {
  filter: drop-shadow(0 0 5px #10B981) brightness(1.25);
  stroke: #10B981 !important;
  stroke-width: 2 !important;
}

.mat-cell.crosshair-col {
  filter: drop-shadow(0 0 5px #38BDF8) brightness(1.25);
  stroke: #38BDF8 !important;
  stroke-width: 2 !important;
}

.mat-cell.crosshair-target {
  filter: drop-shadow(0 0 8px #F59E0B) brightness(1.4);
  stroke: #F59E0B !important;
  stroke-width: 2.5 !important;
}

/* ==========================================================================
   Matrix Weight Fusion Animation Effects
   ========================================================================== */
@keyframes fusionGlowPulse {
  0% {
    filter: drop-shadow(0 0 2px rgba(16, 185, 129, 0.4));
  }
  50% {
    filter: drop-shadow(0 0 20px rgba(16, 185, 129, 0.95)) drop-shadow(0 0 35px rgba(56, 189, 248, 0.6)) brightness(1.2);
  }
  100% {
    filter: drop-shadow(0 0 8px rgba(16, 185, 129, 0.5));
  }
}

@keyframes streamBeamFlow {
  0% {
    stroke-dashoffset: 40;
    opacity: 0.3;
  }
  50% {
    opacity: 1;
  }
  100% {
    stroke-dashoffset: 0;
    opacity: 0.3;
  }
}

@keyframes cellFusedPop {
  0% {
    transform: scale(0.92);
    filter: brightness(1.8) drop-shadow(0 0 10px #10B981);
  }
  60% {
    transform: scale(1.05);
    filter: brightness(1.4) drop-shadow(0 0 6px #34D399);
  }
  100% {
    transform: scale(1);
    filter: none;
  }
}

.panel-fused-glow {
  animation: fusionGlowPulse 1.4s ease-out;
}

.matrix-stream-ray {
  stroke-dasharray: 8 5;
  animation: streamBeamFlow 0.9s linear infinite;
}

.cell-fused-pop {
  animation: cellFusedPop 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* 3-Step Matrix Math Layman Guide Grid — Aligns 1:1 with the 3 Panels Above */
.matrix-guide-grid {
  display: grid;
  grid-template-columns: 1fr 1.8fr 1fr;
  gap: 1.15rem;
  margin-top: 1rem;
}

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

.matrix-guide-card {
  background: var(--bg-surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.95rem 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.matrix-guide-card:hover {
  transform: translateY(-2px);
  border-color: rgba(99, 102, 241, 0.4);
}

.guide-card-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.guide-step-badge {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 2px 7px;
  border-radius: var(--radius-sm);
}

.guide-step-badge.step-base {
  background: rgba(148, 163, 184, 0.15);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.guide-step-badge.step-lora {
  background: rgba(56, 189, 248, 0.15);
  color: #38BDF8;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.guide-step-badge.step-merge {
  background: rgba(16, 185, 129, 0.15);
  color: #34D399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.guide-card-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-primary);
}

.guide-card-body {
  font-size: 0.76rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* ==========================================================================
   Step 5: Alignment & Preference Optimization (RLHF vs DPO vs SimPO)
   ========================================================================== */
.active-simpo {
  background: linear-gradient(135deg, #059669 0%, #0284C7 100%) !important;
  color: #FFFFFF !important;
  border-color: #38BDF8 !important;
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.4);
}

.active-dpo {
  background: linear-gradient(135deg, #7C3AED 0%, #4F46E5 100%) !important;
  color: #FFFFFF !important;
  border-color: #C084FC !important;
  box-shadow: 0 0 12px rgba(192, 132, 252, 0.4);
}

.active-rlhf {
  background: linear-gradient(135deg, #D97706 0%, #B45309 100%) !important;
  color: #FFFFFF !important;
  border-color: #FBBF24 !important;
  box-shadow: 0 0 12px rgba(251, 191, 36, 0.4);
}

.align-grid-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.15rem;
  margin-bottom: 1.15rem;
}

@media (max-width: 960px) {
  .align-grid-layout {
    grid-template-columns: 1fr;
  }
}

.align-battle-arena {
  background: var(--bg-input);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  padding: 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.candidate-card {
  background: var(--bg-surface-1);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  transition: all 0.2s ease;
}

.candidate-card.chosen {
  border-color: rgba(16, 185, 129, 0.4);
  background: rgba(16, 185, 129, 0.05);
}

.candidate-card.rejected {
  border-color: rgba(244, 63, 94, 0.4);
  background: rgba(244, 63, 94, 0.05);
}

.candidate-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
}

.candidate-response-bubble {
  font-size: 0.79rem;
  line-height: 1.45;
  color: var(--text-primary);
  background: var(--bg-surface-2);
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.candidate-score-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.74rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

.margin-gate-box {
  background: var(--bg-surface-2);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.margin-gate-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  font-weight: 600;
}

.margin-track {
  width: 100%;
  height: 12px;
  background: var(--bg-surface-3);
  border-radius: 6px;
  position: relative;
  overflow: hidden;
}

.margin-bar-fill {
  height: 100%;
  border-radius: 6px;
  transition: width 0.3s ease, background-color 0.3s ease;
}

.align-comparison-table-box {
  background: var(--bg-surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.15rem;
  margin-top: 1rem;
  overflow-x: auto;
}

.align-comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.78rem;
  text-align: left;
}

.align-comparison-table th {
  padding: 0.65rem 0.85rem;
  color: var(--text-secondary);
  font-weight: 700;
  border-bottom: 1px solid var(--border-subtle);
}

.align-comparison-table td {
  padding: 0.65rem 0.85rem;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-subtle);
}

.align-comparison-table tr:last-child td {
  border-bottom: none;
}

.align-comparison-table tr.highlight-simpo {
  background: rgba(56, 189, 248, 0.08);
  font-weight: 600;
}

/* Semantic Concept Neural Heatmap */
.vector-feature-box {
  background: var(--bg-input);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  padding: 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.semantic-concepts-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-height: 220px;
  overflow-y: auto;
  padding-right: 4px;
}

.concept-item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.45rem 0.75rem;
  background: var(--bg-surface-2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  font-size: 0.78rem;
  transition: all 0.2s ease;
}

.concept-item-row:hover {
  background: var(--bg-surface-3);
}

.concept-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.concept-icon {
  font-size: 0.9rem;
}

.concept-name {
  font-weight: 600;
  color: var(--text-primary);
}

.concept-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: var(--radius-full);
}

.concept-badge.boosted {
  background: rgba(16, 185, 129, 0.18);
  color: #10B981;
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.concept-badge.suppressed {
  background: rgba(244, 63, 94, 0.18);
  color: #FB7185;
  border: 1px solid rgba(244, 63, 94, 0.4);
}

.concept-badge.neutral {
  background: rgba(100, 116, 139, 0.15);
  color: var(--text-muted);
  border: 1px solid rgba(100, 116, 139, 0.25);
}

/* Slider Bar Controls */
.controls-bar {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  background: var(--bg-surface-1);
  padding: 1.1rem 1.35rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
}

.slider-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  justify-content: flex-start;
}

.slider-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  min-height: 28px;
}

.slider-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
}

.slider-value-badge {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--lora-color);
  background: var(--lora-bg);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(56, 189, 248, 0.35);
  white-space: nowrap;
}

.slider-value-badge.alpha {
  color: #A5B4FC;
  background: rgba(99, 102, 241, 0.15);
  border-color: rgba(99, 102, 241, 0.35);
}

body.light-mode .slider-value-badge.alpha {
  color: #4F46E5;
  background: rgba(99, 102, 241, 0.1);
}

.slider-hint-text {
  font-size: 0.74rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin-top: 2px;
}

.slider-custom {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--bg-surface-3);
  outline: none;
  margin: 4px 0;
}

.slider-custom::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-indigo);
  cursor: pointer;
  box-shadow: 0 0 8px rgba(99, 102, 241, 0.6);
  border: 2px solid #FFF;
}

/* ==========================================================================
   Step 3: Next-Word Softmax Probabilities
   ========================================================================== */
.prob-list-container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  background: var(--bg-input);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  padding: 1.25rem;
}

.prob-row-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.88rem;
}

.prob-word-label {
  font-family: var(--font-mono);
  width: 110px;
  text-align: right;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.prob-bar-track {
  flex: 1;
  height: 24px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 4px;
  overflow: hidden;
  display: flex;
  position: relative;
}

body.light-mode .prob-bar-track {
  background: rgba(0, 0, 0, 0.06);
}

.prob-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.prob-bar-fill.target { background: var(--accent-emerald); }
.prob-bar-fill.base { background: var(--base-color); }
.prob-bar-fill.lora { background: var(--lora-color); }
.prob-bar-fill.dora { background: var(--dora-color); }

.prob-value-text {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  width: 55px;
  color: var(--text-secondary);
}

/* ==========================================================================
   Step 4: Interactive Simulation Controls & Chart
   ========================================================================== */
.sim-controls-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-surface-1);
  padding: 0.75rem 1.1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  margin-bottom: 1rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.sim-buttons-group {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.sim-scrubber-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
  max-width: 320px;
}

.loss-svg-box {
  width: 100%;
  height: 220px;
  background: var(--bg-input);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  position: relative;
  overflow: visible;
}

.loss-svg-box svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.chart-node-circle {
  cursor: pointer;
  transition: r 0.2s ease, fill 0.2s ease;
}

.chart-node-circle:hover {
  r: 7;
  filter: drop-shadow(0 0 6px #10B981);
}

.live-metrics-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.85rem;
}

@media (max-width: 1100px) {
  .live-metrics-strip {
    grid-template-columns: repeat(2, 1fr);
  }
}

.metric-card {
  background: var(--bg-surface-1);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.9rem 1.1rem;
  display: flex;
  flex-direction: column;
  gap: 3px;
  transition: all 0.2s ease;
}

.metric-card:hover {
  background: var(--bg-surface-2);
  border-color: var(--border-medium);
}

.metric-label {
  font-size: 0.74rem;
  color: var(--text-muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.metric-value {
  font-size: 1.35rem;
  font-weight: 800;
  font-family: var(--font-mono);
  margin-top: 2px;
}

.metric-sub {
  font-size: 0.74rem;
  color: var(--text-secondary);
}

/* Math Formula Cards */
.math-formula-card {
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-left: 3px solid #6366F1;
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.1rem;
}

.math-card-header {
  font-size: 0.78rem;
  font-weight: 700;
  color: #6366F1;
  margin-bottom: 0.5rem;
  font-family: var(--font-mono);
}

.light-mode .math-card-header {
  color: #4F46E5;
}

.math-card-body {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-primary);
}

.math-card-caption {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.74rem;
  color: var(--text-muted);
  line-height: 1.45;
}

/* Welcome Orientation Card */
.welcome-orientation-card {
  background: var(--bg-surface-1);
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--lora-color);
  border-radius: var(--radius-md);
}

/* Responsive */
@media (max-width: 900px) {
  .weight-architecture-grid, .controls-bar, .live-metrics-strip, .sim-controls-toolbar {
    grid-template-columns: 1fr;
  }
  .vertical-stepper::before {
    display: none;
  }
  .step-section {
    flex-direction: column;
    gap: 0.75rem;
  }
  .step-indicator-column {
    flex-direction: row;
    align-items: center;
    gap: 0.75rem;
  }
}