/* ============================================================
   RAG Visualizer — Chunking Lab Design System
   Theme: Superman High-Contrast Color-Blocked Light Mode
   Palette: Blue #2563eb | Red #ef4444 | Gold #f59e0b
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&family=Roboto+Condensed:wght@400;700&display=swap');

/* --- Design Tokens --- */
:root {
  /* Surface Colors */
  --bg-root: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-raised: #f1f5f9;
  --bg-surface-overlay: #e2e8f0;
  --bg-input: #f8fafc;

  /* Borders */
  --border-subtle: rgba(15, 23, 42, 0.05);
  --border-default: rgba(15, 23, 42, 0.09);
  --border-active: rgba(37, 99, 235, 0.35);

  /* Text Colors */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #64748b;
  --text-inverse: #ffffff;

  /* Superman Blue — Structural (borders, headers, outlines, secondary data) */
  --superman-blue: #2563eb;
  --superman-blue-hover: #1d4ed8;
  --superman-blue-muted: rgba(37, 99, 235, 0.08);
  --superman-blue-glow: rgba(37, 99, 235, 0.2);

  /* Superman Red — Action/Attention (CTA buttons, active states, query nodes) */
  --superman-red: #ef4444;
  --superman-red-hover: #dc2626;
  --superman-red-muted: rgba(239, 68, 68, 0.08);
  --superman-red-glow: rgba(239, 68, 68, 0.2);

  /* Superman Gold — Interactive/Highlight (slider thumbs, Rank 1, connecting lines) */
  --superman-yellow: #f59e0b;
  --superman-yellow-hover: #d97706;
  --superman-yellow-muted: rgba(245, 158, 11, 0.08);
  --superman-yellow-glow: rgba(245, 158, 11, 0.2);

  /* Functional Accent — Default to Blue for structural context */
  --accent: var(--superman-blue);
  --accent-hover: var(--superman-blue-hover);
  --accent-muted: var(--superman-blue-muted);
  --accent-glow: var(--superman-blue-glow);

  /* Chunk Highlight Colors */
  --chunk-color-1: var(--superman-blue);
  --chunk-color-2: var(--superman-red);
  --chunk-color-3: var(--superman-yellow);
  --chunk-color-4: #818cf8;

  /* Semantic */
  --success: #16a34a;
  --warning: #d97706;
  --error: #dc2626;
  --info: #2563eb;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 36px rgba(15, 23, 42, 0.08);
  --shadow-glow-red: 0 0 20px var(--superman-red-glow);
  --shadow-glow-blue: 0 0 20px var(--superman-blue-glow);
  --shadow-glow-gold: 0 0 20px var(--superman-yellow-glow);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-heading: 'Roboto Condensed', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

/* --- Kryptonite Protocol (Error States) --- */
.text-kryptonite {
  color: #22c55e !important;
}
.bg-kryptonite-wash {
  background-color: rgba(34, 197, 94, 0.1) !important;
  border: 1px solid #22c55e !important;
}

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

html {
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-root);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Subtle dot grid texture */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(148, 163, 184, 0.03) 1px, transparent 0);
  background-size: 32px 32px;
  pointer-events: none;
  z-index: 0;
}

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--text-tertiary); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* --- Layout --- */
.app-wrapper {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ============================================================
   1. HEADER — Blue-to-Red gradient logo, frosted glass bar
   ============================================================ */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-xl);
  border-bottom: 1px solid var(--border-default);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.app-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* Logo icon: Blue-to-Red gradient */
.app-logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(90deg, #2563eb 0%, #ef4444 100%);
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
  font-size: 16px;
}

.app-logo-text {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

/* "Visualizer" span in Blue */
.app-logo-text span {
  color: var(--superman-blue);
}

.app-header-badge {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--superman-blue);
  background: var(--superman-blue-muted);
  padding: 2px 10px;
  border-radius: 99px;
  border: 1px solid rgba(37, 99, 235, 0.2);
}

/* ============================================================
   2. MAIN CONTENT — 3 Column Grid
   ============================================================ */
.app-main {
  display: grid;
  grid-template-columns: 300px 1fr 340px;
  gap: 0;
  flex: 1;
  overflow: hidden;
}

/* --- Panels --- */
.panel {
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border-default);
  overflow-y: auto;
  height: calc(100vh - 57px);
}

.panel:last-child {
  border-right: none;
}

.panel-header {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  position: sticky;
  top: 0;
  z-index: 10;
}

.panel-header h2 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.panel-header h2 .icon {
  font-size: 1rem;
}

/* Sidebar Panel Header Overrides */
#config-panel .panel-header,
#inspector-panel .panel-header {
  border-bottom: none;
  background: transparent;
  padding-bottom: var(--space-xs);
}

#config-panel .panel-header h2,
#inspector-panel .panel-header h2 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  text-transform: none;
  letter-spacing: normal;
  color: var(--text-primary);
}

.panel-body {
  padding: var(--space-lg);
  flex: 1;
  overflow-y: auto;
}

/* ============================================================
   3. CONFIG PANEL (Left Sidebar)
   ============================================================ */
.config-section {
  margin-bottom: var(--space-xl);
}

.config-section-title {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-tertiary);
  margin-bottom: var(--space-md);
}

/* --- Strategy Selector Cards --- */
.strategy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}

.strategy-card {
  position: relative;
  padding: var(--space-md);
  background-color: #ffffff;
  border: 1px solid #e5e7eb;
  border-top: 4px solid var(--superman-blue);
  border-radius: 10px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
  text-align: center;
  overflow: hidden;
}

.strategy-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.15);
  border-color: var(--superman-blue);
}

/* Active strategy card: White background, thicker blue border, corner badge */
.strategy-card.active {
  border: 2px solid var(--superman-blue);
  border-top: 4px solid var(--superman-blue);
  background-color: #ffffff;
  box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.25), var(--shadow-glow-blue);
}

/* Corner badge for active strategy */
.strategy-card.active::after {
  content: '✓';
  position: absolute;
  top: 0;
  right: 0;
  width: 24px;
  height: 24px;
  background-color: var(--superman-red);
  color: #ffffff;
  font-size: 12px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom-left-radius: 4px;
}

.strategy-card input[type="radio"] {
  display: none;
}

.strategy-card-icon {
  font-size: 1.4rem;
  margin-bottom: var(--space-xs);
}

.strategy-card-name {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-primary);
}

.strategy-card-desc {
  font-size: 0.65rem;
  color: var(--text-tertiary);
  margin-top: 2px;
}

/* --- Sliders (Blue track, Gold thumb) --- */
.config-field {
  margin-bottom: var(--space-lg);
}

.config-field label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

/* Value badges in Blue */
.config-field .value-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--superman-blue);
  background: var(--superman-blue-muted);
  padding: 1px 8px;
  border-radius: 99px;
}

/* Slider track: thin Blue */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--superman-blue-muted) 0%, rgba(37, 99, 235, 0.15) 100%);
  border-radius: 99px;
  outline: none;
  cursor: pointer;
}

/* Slider thumb: Superman Gold */
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--superman-yellow);
  border: 2px solid var(--bg-surface);
  box-shadow: 0 0 8px var(--superman-yellow-glow);
  cursor: pointer;
  transition: transform var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 12px var(--superman-yellow-glow);
}

input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--superman-yellow);
  border: 2px solid var(--bg-surface);
  box-shadow: 0 0 8px var(--superman-yellow-glow);
  cursor: pointer;
}

/* --- Text Input --- */
.text-input-wrapper {
  position: relative;
}

.text-input {
  width: 100%;
  min-height: 120px;
  padding: var(--space-md);
  background: var(--bg-input);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.7;
  resize: vertical;
  outline: none;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.text-input:focus {
  border-color: var(--superman-blue);
  box-shadow: 0 0 0 3px var(--superman-blue-muted);
}

.text-input::placeholder {
  color: var(--text-tertiary);
}

.char-count {
  position: absolute;
  bottom: var(--space-sm);
  right: var(--space-md);
  font-size: 0.65rem;
  font-family: var(--font-mono);
  color: var(--text-tertiary);
}

/* --- Separators Input --- */
.separator-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  padding: var(--space-sm);
  background: var(--bg-input);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  min-height: 36px;
  cursor: text;
}

.separator-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  background: var(--bg-surface-overlay);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
}

.separator-tag .remove {
  cursor: pointer;
  color: var(--text-tertiary);
  font-size: 0.85rem;
  line-height: 1;
  transition: color var(--transition-fast);
}

.separator-tag .remove:hover {
  color: var(--superman-red);
}

.separator-input {
  border: none;
  outline: none;
  background: transparent;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  flex: 1;
  min-width: 60px;
}

/* ============================================================
   4. RUN BUTTON — Superman Red CTA (primary action)
   ============================================================ */
.btn-run {
  width: 100%;
  padding: var(--space-md) var(--space-lg);
  background: linear-gradient(135deg, var(--superman-red), var(--superman-red-hover));
  color: var(--text-inverse);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  position: relative;
  overflow: hidden;
}

.btn-run::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.15));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.btn-run:hover::before {
  opacity: 1;
}

.btn-run:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow-red), var(--shadow-md);
}

.btn-run:active {
  transform: translateY(0);
}

.btn-run:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-run:disabled:hover::before {
  opacity: 0;
}

.btn-run .spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--text-inverse);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  display: none;
}

.btn-run.loading .spinner {
  display: block;
}

.btn-run.loading .btn-text {
  display: none;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Pulse animation for Run button — Red glow */
@keyframes pulse-glow-red {
  0%, 100% { box-shadow: 0 0 8px var(--superman-red-glow); }
  50% { box-shadow: 0 0 20px var(--superman-red-glow), 0 0 40px rgba(239, 68, 68, 0.1); }
}

.btn-run.ready {
  animation: pulse-glow-red 2s ease-in-out infinite;
}

/* ============================================================
   5. CENTER PANEL — Tabs (Document Viewer / Vector Space 2D)
   ============================================================ */
.xray-viewer {
  position: relative;
}

/* --- Interactive Tabs Navigation --- */
.tabs-header {
  padding: 0 !important;
}
.tab-buttons {
  display: flex;
  height: 56px;
  width: 100%;
}

/* Tab button: Blue text, no background highlight */
.tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  transition: all var(--transition-base);
}

.tab-btn:hover {
  color: var(--text-primary);
  background: transparent;
}

/* Active tab: 3px solid Red bottom border, Red text, NO background tint */
.tab-btn.active {
  color: var(--superman-red);
  border-bottom-color: var(--superman-red);
  background: transparent;
}

/* --- Tab Content Visibility --- */
.tab-content {
  display: none !important;
}
.tab-content.active {
  display: flex !important;
  flex-direction: column;
}

/* --- X-Ray Text Container --- */
.xray-text-container {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 2;
  white-space: pre-wrap;
  word-break: break-word;
  padding: var(--space-lg);
  position: relative;
}

/* Chunk highlights in the text */
.chunk-highlight {
  position: relative;
  border-radius: 3px;
  padding: 1px 0;
  border-left: 3px solid var(--superman-red); /* "Cape" Accent */
  transition: all var(--transition-fast);
  cursor: pointer;
}

/* ============================================================
   RETRIEVAL X-RAY HIGHLIGHTS (TASK 3.4)
   ============================================================ */

/* --- Premium Toast Notification System --- */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  z-index: 9999;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  background-color: var(--bg-surface-raised, #1f2937);
  border: 1px solid var(--border-default, #374151);
  color: var(--text-primary, #f3f4f6);
  padding: 12px 18px;
  border-radius: var(--radius-md, 8px);
  box-shadow: var(--shadow-lg, 0 10px 15px -3px rgba(0, 0, 0, 0.3));
  font-family: var(--font-sans, system-ui);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: var(--space-sm, 8px);
  min-width: 250px;
  max-width: 380px;
  animation: toast-slide-in 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  transition: all 0.3s ease;
  border-left: 4px solid var(--superman-blue, #3b82f6);
}

.toast.toast-info {
  border-left-color: var(--superman-blue, #3b82f6);
}

.toast.toast-warning {
  border-left-color: var(--warning-color, #f59e0b);
}

.toast.toast-success {
  border-left-color: var(--success-color, #10b981);
}

.toast.toast-error {
  border-left-color: var(--superman-red, #ef4444);
}

.toast.toast-fade-out {
  opacity: 0;
  transform: translateY(10px);
}

@keyframes toast-slide-in {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* --- Select Dropdown Styling --- */
.select-input {
  padding: 8px 12px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.8rem;
  outline: none;
  transition: all var(--transition-base);
  cursor: pointer;
}

.select-input:focus {
  border-color: var(--superman-blue);
  box-shadow: 0 0 0 2px var(--superman-blue-muted);
}

.xray-content.search-active .chunk-highlight {
  opacity: 0.3;
  transition: all 0.3s ease;
}

.xray-content.search-active .chunk-highlight.retrieved-rank-1 {
  opacity: 1.0;
  background-color: rgba(255, 165, 0, 0.4);
  box-shadow: 0 0 12px rgba(255, 165, 0, 0.6);
  border-top: 2px solid var(--warning-color);
  border-bottom: 2px solid var(--warning-color);
  z-index: 10;
  position: relative;
}

.xray-content.search-active .chunk-highlight.retrieved-rank-2 {
  opacity: 0.9;
  background-color: rgba(255, 165, 0, 0.25);
  border-top: 2px dashed rgba(255, 165, 0, 0.6);
  border-bottom: 2px dashed rgba(255, 165, 0, 0.6);
  z-index: 9;
  position: relative;
}

.xray-content.search-active .chunk-highlight.retrieved-rank-3 {
  opacity: 0.8;
  background-color: rgba(255, 165, 0, 0.15);
  border-top: 2px dotted rgba(255, 165, 0, 0.4);
  border-bottom: 2px dotted rgba(255, 165, 0, 0.4);
  z-index: 8;
  position: relative;
}

/* Query Result Footer Metadata */
.query-result-meta {
  display: flex;
  gap: var(--space-md);
  margin-top: 6px;
  font-size: 0.68rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  border-top: 1px dashed var(--border-default);
  padding-top: 4px;
}

/* Distance and Score Badges */
.dist-badge {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  background: var(--bg-surface-raised);
  border: 1px solid var(--border-default);
  padding: 2px 8px;
  border-radius: 99px;
  color: var(--text-secondary);
}

.score-badge-val {
  font-weight: 600;
  color: var(--superman-blue);
}

.score-badge-original {
  font-size: 0.65rem;
  color: var(--text-tertiary);
  font-style: italic;
  margin-left: 4px;
}

/* Rank Shift Badges */
.rank-shift-badge {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  margin-left: 8px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.rank-shift-up {
  color: #16a34a;
  background-color: rgba(22, 163, 74, 0.08);
  border: 1px solid rgba(22, 163, 74, 0.2);
}

.rank-shift-down {
  color: #dc2626;
  background-color: rgba(220, 38, 38, 0.08);
  border: 1px solid rgba(220, 38, 38, 0.2);
}

.rank-shift-unchanged {
  color: var(--text-tertiary);
  background-color: var(--bg-surface-raised);
  border: 1px solid var(--border-default);
}

/* Lexical Heatmap Highlights */
.query-result-text mark,
.retrieved-chunk-text mark {
  background-color: rgba(245, 158, 11, 0.22); /* Superman Gold Muted */
  color: #b45309; /* Highly readable deep amber */
  border-bottom: 2px solid var(--superman-yellow);
  font-weight: 600;
  padding: 1px 3px;
  border-radius: 3px;
  transition: all 0.2s ease;
}

.query-result-text mark:hover,
.retrieved-chunk-text mark:hover {
  background-color: rgba(245, 158, 11, 0.35);
  color: #78350f;
  cursor: help;
}


/* ============================================================
   THE GRAND COMPARISON ARENA (TASK 3.5)
   ============================================================ */
.arena-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(8px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
}

.arena-modal-content {
  background: var(--bg-surface);
  width: 90vw;
  height: 90vh;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--border-default);
}

.arena-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) var(--space-xl);
  background: var(--bg-surface-elevated);
  border-bottom: 1px solid var(--border-default);
}

.arena-header h2 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--superman-red);
}

.btn-close-arena {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
}

.btn-close-arena:hover {
  color: var(--superman-red);
}

.arena-query-bar {
  display: flex;
  padding: var(--space-lg) var(--space-xl);
  gap: var(--space-md);
  background: var(--bg-surface-elevated);
  border-bottom: 1px solid var(--border-default);
}

.arena-query-bar input {
  flex: 1;
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-default);
  background: var(--bg-surface);
  color: var(--text-primary);
  font-size: 1rem;
}

.arena-columns {
  display: flex;
  height: 385px;
  flex-shrink: 0;
  border-bottom: 1px solid var(--border-default);
}

.arena-body {
  flex: 1;
  overflow-y: auto;
  padding: 0 0 var(--space-xl) 0;
  display: flex;
  flex-direction: column;
}

.arena-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--border-default);
}
.arena-col:last-child {
  border-right: none;
}

.arena-col-header {
  padding: var(--space-md) var(--space-xl);
  border-bottom: 2px solid var(--warning-color);
  background: rgba(255, 255, 255, 0.02);
}

.arena-col-header h3 {
  margin: 0 0 var(--space-sm) 0;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.arena-config-row {
  display: flex;
  gap: var(--space-sm);
}

.arena-config-row select {
  flex: 1;
}

.arena-results-list {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

/* Low opacity wash of primary colors, no underlines */
.chunk-highlight[data-color="1"] { background: rgba(37, 99, 235, 0.1); }
.chunk-highlight[data-color="2"] { background: rgba(239, 68, 68, 0.1); }
.chunk-highlight[data-color="3"] { background: rgba(245, 158, 11, 0.1); }
.chunk-highlight[data-color="4"] { background: rgba(129, 140, 248, 0.1); }

.chunk-highlight.active[data-color="1"] { background: rgba(37, 99, 235, 0.25); box-shadow: 0 0 12px rgba(37, 99, 235, 0.15); }
.chunk-highlight.active[data-color="2"] { background: rgba(239, 68, 68, 0.25); box-shadow: 0 0 12px rgba(239, 68, 68, 0.15); }
.chunk-highlight.active[data-color="3"] { background: rgba(245, 158, 11, 0.25); box-shadow: 0 0 12px rgba(245, 158, 11, 0.15); }
.chunk-highlight.active[data-color="4"] { background: rgba(129, 140, 248, 0.25); box-shadow: 0 0 12px rgba(129, 140, 248, 0.15); }

/* Chunk boundary marker */
.chunk-boundary {
  display: inline-block;
  width: 0;
  height: 1em;
  border-left: 2px dashed var(--text-tertiary);
  margin: 0 2px;
  vertical-align: middle;
  opacity: 0.5;
}

/* Overlap region */
.overlap-region {
  background: repeating-linear-gradient(
    -45deg,
    transparent,
    transparent 2px,
    rgba(251, 146, 60, 0.15) 2px,
    rgba(251, 146, 60, 0.15) 4px
  ) !important;
  border-bottom: 2px dashed var(--warning) !important;
}

/* Empty state */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 400px;
  color: var(--text-tertiary);
  text-align: center;
  gap: var(--space-md);
}

.empty-state-icon {
  font-size: 3rem;
  opacity: 0.8;
  color: #22c55e; /* Kryptonite Green */
}

.empty-state-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.empty-state-desc {
  font-size: 0.78rem;
  max-width: 280px;
  line-height: 1.6;
}

/* ============================================================
   6. VECTOR SPACE TAB (Phase 2)
   ============================================================ */
.vector-space-container {
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
  gap: var(--space-md);
  padding: var(--space-lg);
}

/* Canvas wrapper: Fortress of Solitude Grid */
.canvas-wrapper {
  flex: 1;
  position: relative;
  border: 1px solid var(--superman-blue);
  border-radius: var(--radius-lg);
  background-color: #fafafa;
  background-image: 
    linear-gradient(rgba(37, 99, 235, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37, 99, 235, 0.05) 1px, transparent 1px);
  background-size: 24px 24px;
  overflow: hidden;
  box-shadow: inset 0 2px 8px rgba(15, 23, 42, 0.04);
  min-height: 380px;
}

#vector-canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
}
#vector-canvas:active {
  cursor: grabbing;
}

/* Canvas Help Overlay */
.canvas-help-overlay {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(4px);
  padding: 6px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-default);
  pointer-events: none;
}
.canvas-help-overlay span {
  font-size: 0.68rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

/* Floating Tooltip inside Canvas — Blue left accent bar */
.vector-tooltip {
  position: absolute;
  pointer-events: none;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-default);
  border-left: 3px solid var(--superman-blue);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  color: var(--text-primary);
  max-width: 280px;
  font-size: 0.75rem;
  box-shadow: var(--shadow-lg);
  z-index: 50;
  transition: opacity 100ms ease;
}
.vector-tooltip-title {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--superman-blue);
  margin-bottom: var(--space-xs);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  justify-content: space-between;
}
.vector-tooltip-coords {
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  font-size: 0.65rem;
}
.vector-tooltip-text {
  font-family: var(--font-mono);
  color: var(--text-secondary);
  line-height: 1.5;
  margin-top: var(--space-xs);
  border-top: 1px solid var(--border-subtle);
  padding-top: var(--space-xs);
}

/* ============================================================
   7. SONAR QUERY SIMULATOR
   ============================================================ */
.query-simulator-section {
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  box-shadow: var(--shadow-md);
}

.query-section-title {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--superman-blue);
  display: flex;
  align-items: center;
  gap: 6px;
}

.query-section-title .radar-icon {
  color: var(--superman-yellow);
}

.query-input-wrapper {
  display: flex;
  gap: var(--space-sm);
}

/* Query input: Blue focus ring */
#query-input {
  flex: 1;
  padding: 10px 14px;
  background: var(--bg-input);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.8rem;
  outline: none;
  transition: all var(--transition-base);
}
#query-input:focus {
  border-color: var(--superman-blue);
  box-shadow: 0 0 0 2px var(--superman-blue-muted);
}

/* Query button: Red CTA style */
.btn-query {
  padding: 10px var(--space-lg);
  background: var(--superman-red);
  border: 1px solid var(--superman-red);
  color: var(--text-inverse);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
}
.btn-query:hover {
  background: var(--superman-red-hover);
  box-shadow: var(--shadow-glow-red);
}

/* Retrieved Results Drawer */
.query-results-drawer {
  border-top: 1px solid var(--border-subtle);
  padding-top: var(--space-sm);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  max-height: 200px;
  overflow-y: auto;
}

.drawer-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.drawer-header h3 {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}
.close-drawer {
  cursor: pointer;
  font-size: 1.2rem;
  color: var(--text-tertiary);
  line-height: 1;
  transition: color var(--transition-fast);
}
.close-drawer:hover {
  color: var(--superman-red);
}

.query-results-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.retrieved-chunk-card {
  display: flex;
  flex-direction: column;
  padding: var(--space-sm) var(--space-md);
  background-color: #ffffff;
  border: 1px solid var(--border-subtle);
  border-left: 4px solid var(--superman-blue);
  border-radius: var(--radius-md);
  gap: 2px;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.retrieved-chunk-card:hover {
  border-color: var(--superman-blue);
  background: var(--superman-blue-muted);
}

/* Rank 1 card: Gold left accent border */
.retrieved-chunk-card.rank-1 {
  border-left: 4px solid var(--superman-yellow);
  background: #ffffff;
}

.retrieved-chunk-card.rank-1:hover {
  background: var(--superman-yellow-muted);
}

.retrieved-chunk-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.65rem;
  font-family: var(--font-mono);
}

/* Rank label: Gold for Rank 1, Blue for others */
.retrieved-chunk-rank {
  font-weight: 700;
  color: var(--superman-blue);
}
.retrieved-chunk-card.rank-1 .retrieved-chunk-rank {
  color: var(--superman-yellow);
}

/* Score badge: Red pill */
.retrieved-chunk-score {
  color: var(--text-inverse);
  background-color: var(--superman-red);
  font-weight: bold;
  padding: 1px 8px;
  border-radius: 99px;
}

.retrieved-chunk-text {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
  line-height: 1.4;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ============================================================
   8. CHUNK INSPECTOR (Right Panel)
   ============================================================ */

/* --- Stat Cards: Frosted glass with Blue top accent border --- */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
}

.stat-card {
  padding: var(--space-md);
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--border-default);
  border-top: 3px solid var(--superman-blue);
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

/* Stat values: Red/Gold monospace */
.stat-card .stat-value {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--superman-red);
}

.stat-card:nth-child(even) .stat-value {
  color: var(--superman-yellow);
}

.stat-card .stat-label {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  margin-top: 2px;
}

/* --- Chunk List --- */
.chunk-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.chunk-item {
  padding: var(--space-md);
  padding-left: calc(var(--space-md) + 28px); /* Room for the index circle */
  background-color: #ffffff;
  border: 1px solid #e5e7eb;
  border-left: 4px solid var(--superman-blue); /* Default alternating later */
  border-radius: 4px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
  position: relative;
  overflow: hidden;
}

/* Alternate Left Borders */
.chunk-item:nth-child(3n+1) { border-left-color: var(--superman-blue); }
.chunk-item:nth-child(3n+2) { border-left-color: var(--superman-red); }
.chunk-item:nth-child(3n+3) { border-left-color: var(--superman-yellow); }

.chunk-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.15);
}

/* Active chunk */
.chunk-item.active {
  background: rgba(37, 99, 235, 0.05);
}

.chunk-item.active::before {
  background: var(--superman-red);
}

/* Parent chunk styling */
.chunk-item[data-level="0"] {
  border-left: 3px solid var(--superman-blue);
}

.chunk-item[data-level="0"]::before {
  background: var(--superman-blue);
}

/* Child chunk styling */
.chunk-item[data-level="1"] {
  margin-left: var(--space-lg);
  border-left: 3px solid var(--superman-yellow);
  opacity: 0.85;
}

.chunk-item[data-level="1"]::before {
  background: var(--superman-yellow);
}

.chunk-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-sm);
}

/* Chunk ID: Blue mono label */
.chunk-item-id {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--superman-blue);
}

.chunk-item.active .chunk-item-id {
  color: var(--superman-red);
}

.chunk-item-badges {
  display: flex;
  gap: var(--space-xs);
}

.chunk-badge {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  padding: 1px 6px;
  border-radius: 99px;
  background: var(--bg-surface-overlay);
  color: var(--text-tertiary);
  border: 1px solid var(--border-subtle);
}

/* Token badge: Blue tinted */
.chunk-badge.tokens {
  color: var(--superman-blue);
  background: var(--superman-blue-muted);
  border-color: rgba(37, 99, 235, 0.2);
}

.chunk-item-text {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
  line-height: 1.6;
  max-height: 60px;
  overflow: hidden;
  position: relative;
}

.chunk-item-text::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 24px;
  background: linear-gradient(transparent, var(--bg-surface));
  pointer-events: none;
}

.chunk-item.active .chunk-item-text::after {
  background: linear-gradient(transparent, rgba(239, 68, 68, 0.06));
}

.chunk-item-meta {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-sm);
  font-size: 0.65rem;
  color: var(--text-tertiary);
  font-family: var(--font-mono);
}

/* Parent-child connector label */
.parent-child-label {
  font-size: 0.6rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--superman-blue);
  padding: var(--space-xs) 0;
  margin-top: var(--space-sm);
}

/* --- Config: Parent-Child Fields --- */
.parent-child-config {
  display: none;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-md);
  background: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  margin-top: var(--space-sm);
}

.parent-child-config.visible {
  display: flex;
}

.pc-section-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding-bottom: var(--space-xs);
  border-bottom: 1px solid var(--border-subtle);
}

.pc-section-label.parent { color: var(--superman-blue); }
.pc-section-label.child { color: var(--superman-yellow); }

/* ============================================================
   9. SELECT INPUT
   ============================================================ */
.select-input {
  width: 100%;
  padding: 8px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  outline: none;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  cursor: pointer;
  transition: border-color var(--transition-base);
}
.select-input:focus {
  border-color: var(--superman-blue);
}

/* ============================================================
   10. ANIMATIONS & SKELETONS
   ============================================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.chunk-item {
  animation: fadeInUp var(--transition-slow) both;
}

.chunk-item:nth-child(1) { animation-delay: 0ms; }
.chunk-item:nth-child(2) { animation-delay: 40ms; }
.chunk-item:nth-child(3) { animation-delay: 80ms; }
.chunk-item:nth-child(4) { animation-delay: 120ms; }
.chunk-item:nth-child(5) { animation-delay: 160ms; }
.chunk-item:nth-child(6) { animation-delay: 200ms; }
.chunk-item:nth-child(7) { animation-delay: 240ms; }
.chunk-item:nth-child(8) { animation-delay: 280ms; }

/* 1. Heat Vision Pulse (Applied to the Sonar Probe node in Canvas via JS, but CSS provided if DOM used) */
@keyframes radar-pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 20px rgba(239, 68, 68, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}
.sonar-probe {
  background-color: #ef4444;
  border-radius: 50%;
  animation: radar-pulse 2s infinite;
}

/* 2. Super Speed Data Flow (Applied to the SVG connecting lines if DOM used) */
@keyframes data-flow {
  to { stroke-dashoffset: -20; }
}
.connection-line {
  stroke: #f59e0b;
  stroke-width: 2;
  stroke-dasharray: 5, 5;
  animation: data-flow 0.8s linear infinite;
}

/* 3. Yellow Sun Glow (Applied to the Rank 1 retrieved node if DOM used) */
@keyframes sun-glow {
  0%, 100% { box-shadow: 0 0 5px rgba(245, 158, 11, 0.6); }
  50% { box-shadow: 0 0 15px #f59e0b, 0 0 25px rgba(245, 158, 11, 0.4); }
}
.rank-1-node {
  background-color: #f59e0b;
  border-radius: 50%;
  animation: sun-glow 3s ease-in-out infinite;
}

/* Heat Vision Skeleton Animation */
@keyframes heat-sweep {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.skeleton-loader {
  height: 60px; /* Adjust based on your text line height */
  border-radius: 4px;
  /* Sweeps a soft red gradient over a standard grey skeleton base */
  background: linear-gradient(90deg, #f3f4f6 25%, rgba(239, 68, 68, 0.15) 50%, #f3f4f6 75%);
  background-size: 200% 100%;
  animation: heat-sweep 1.5s infinite linear;
}

/* ============================================================
   11. RESPONSIVE
   ============================================================ */
@media (max-width: 1200px) {
  .app-main {
    grid-template-columns: 260px 1fr 300px;
  }
}

@media (max-width: 900px) {
  .app-main {
    grid-template-columns: 1fr;
    grid-template-rows: auto 1fr auto;
  }

  .panel {
    height: auto;
    max-height: 50vh;
    border-right: none;
    border-bottom: 1px solid var(--border-default);
  }
}

/* ============================================================
   12. AI REFEREE (TASK 5.1)
   ============================================================ */
.arena-referee-panel {
  margin-top: 2rem;
  padding: 1.5rem;
  border-radius: 8px;
  background-color: var(--bg-surface-raised);
  border: 1px solid var(--border-default);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.02);
}

.referee-divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin-bottom: 1.5rem;
}

.referee-divider::before,
.referee-divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px dashed var(--border-default);
}

.referee-badge {
  padding: 0.25rem 0.75rem;
  font-family: 'Roboto Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--superman-blue);
  background-color: var(--superman-blue-muted);
  border-radius: 50px;
  border: 1px solid rgba(37, 99, 235, 0.2);
  letter-spacing: 0.05em;
  margin: 0 1rem;
}

.referee-prompt-text {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.referee-status-text {
  text-align: center;
  font-weight: 500;
  color: var(--superman-blue);
  font-size: 0.9rem;
  animation: pulse 1.5s infinite ease-in-out;
}

.referee-verdict-box {
  animation: fadeIn 0.4s ease-out;
}

/* Verdict banner */
.verdict-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-radius: 6px;
  border: 1.5px solid;
  margin-bottom: 1.5rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
}

.verdict-title {
  font-family: 'Roboto Condensed', sans-serif;
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: 0.02em;
}

.verdict-confidence {
  font-size: 0.85rem;
  font-weight: 600;
  background-color: rgba(255, 255, 255, 0.7);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

/* Verdict reason */
.verdict-reason {
  background-color: var(--bg-surface);
  padding: 1.25rem;
  border-radius: 6px;
  border: 1px solid var(--border-default);
  margin-bottom: 1.5rem;
}

.verdict-reason > strong {
  display: block;
  font-size: 0.85rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.verdict-reason p {
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.5;
  margin-bottom: 0.75rem;
  font-style: italic;
}

.deciding-factor {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.deciding-factor code {
  background-color: var(--bg-surface-raised);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--superman-red);
  font-weight: 600;
}

/* Scorecard Table */
.referee-scores-table {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.scores-table-header {
  display: grid;
  grid-template-columns: 150px 70px 1fr 70px;
  padding: 0.75rem 1rem;
  background-color: var(--bg-surface-raised);
  border-bottom: 1px solid var(--border-default);
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.scores-table-row {
  display: grid;
  grid-template-columns: 150px 70px 1fr 70px;
  align-items: center;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-default);
  font-size: 0.9rem;
}

.scores-table-row:last-child {
  border-bottom: none;
}

.overall-row {
  background-color: rgba(37, 99, 235, 0.02);
  border-top: 1.5px solid var(--border-default);
}

.score-col-label {
  font-weight: 500;
  color: var(--text-primary);
}

.score-col-val {
  text-align: center;
  font-weight: 600;
}

.score-col-bar {
  padding: 0 1rem;
}

.score-progress-bar {
  height: 6px;
  background-color: #e2e8f0;
  border-radius: 10px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
}

.score-val-a {
  background-color: var(--superman-yellow);
  height: 100%;
  border-radius: 10px 0 0 10px;
  justify-self: end;
}

.score-val-b {
  background-color: var(--superman-blue);
  height: 100%;
  border-radius: 0 10px 10px 0;
  justify-self: start;
}

.overall-progress-bar {
  height: 10px;
  background-color: #e2e8f0;
  border-radius: 10px;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
}

.overall-val-a {
  background-color: var(--superman-yellow);
  height: 100%;
  border-radius: 10px 0 0 10px;
  justify-self: end;
}

.overall-val-b {
  background-color: var(--superman-blue);
  height: 100%;
  border-radius: 0 10px 10px 0;
  justify-self: start;
}

/* Strengths & Weaknesses Columns */
.verdict-details-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.verdict-details-col {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  padding: 1.25rem;
  border-radius: 6px;
}

.verdict-details-col h4 {
  font-family: 'Roboto Condensed', sans-serif;
  font-weight: 700;
  margin-bottom: 1rem;
  font-size: 1rem;
  border-bottom: 1.5px solid var(--border-default);
  padding-bottom: 0.5rem;
}

.verdict-details-col:first-child h4 {
  color: var(--warning-color);
  border-bottom-color: rgba(245, 158, 11, 0.2);
}

.verdict-details-col:last-child h4 {
  color: var(--info-color);
  border-bottom-color: rgba(59, 130, 246, 0.2);
}

.verdict-list-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.strength-list-title {
  color: #16a34a;
}

.weakness-list-title {
  color: #dc2626;
  margin-top: 1rem;
}

.verdict-details-col ul {
  padding-left: 1.25rem;
  margin: 0;
}

.verdict-details-col li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.4;
  margin-bottom: 0.4rem;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}


/* ============================================================
   RETRIEVAL X-RAY HIGHLIGHTS (TASK 3.4)
   ============================================================ */
.xray-content.search-active .chunk-highlight {
  opacity: 0.3;
  transition: all 0.3s ease;
}

.xray-content.search-active .chunk-highlight.retrieved-rank-1 {
  opacity: 1.0;
  background-color: rgba(255, 165, 0, 0.4);
  box-shadow: 0 0 12px rgba(255, 165, 0, 0.6);
  border-top: 2px solid var(--warning-color);
  border-bottom: 2px solid var(--warning-color);
  z-index: 10;
  position: relative;
}

.xray-content.search-active .chunk-highlight.retrieved-rank-2 {
  opacity: 0.9;
  background-color: rgba(255, 165, 0, 0.25);
  border-top: 2px dashed rgba(255, 165, 0, 0.6);
  border-bottom: 2px dashed rgba(255, 165, 0, 0.6);
  z-index: 9;
  position: relative;
}

.xray-content.search-active .chunk-highlight.retrieved-rank-3 {
  opacity: 0.8;
  background-color: rgba(255, 165, 0, 0.15);
  border-top: 2px dotted rgba(255, 165, 0, 0.4);
  border-bottom: 2px dotted rgba(255, 165, 0, 0.4);
  z-index: 8;
  position: relative;
}




/* ============================================================
   MOBILE RESPONSIVENESS MEDIA QUERIES
   ============================================================ */
@media (max-width: 1024px) {
  .app-main {
    grid-template-columns: 1fr !important;
    height: auto !important;
  }

  .panel {
    border-right: none !important;
    border-bottom: 1px solid var(--border-default) !important;
    height: auto !important;
    max-height: none !important;
    overflow-y: visible !important;
  }

  #config-panel {
    order: 1;
  }

  #xray-panel {
    order: 2;
    min-height: 450px;
    height: 600px !important; /* Contain document viewer / vector map height */
  }

  #inspector-panel {
    order: 3;
    max-height: 500px !important;
  }

  .canvas-wrapper {
    height: 350px !important;
  }

  .arena-modal-content {
    width: 95% !important;
    height: 90% !important;
    max-height: 90% !important;
    padding: var(--space-md) !important;
  }
}

@media (max-width: 768px) {
  .app-header {
    padding: var(--space-sm) var(--space-md) !important;
    flex-direction: column;
    gap: var(--space-sm);
    align-items: flex-start;
  }

  .strategy-grid {
    grid-template-columns: 1fr !important;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr !important;
    gap: var(--space-sm) !important;
  }

  .arena-columns {
    flex-direction: column !important;
    gap: var(--space-md) !important;
  }

  .arena-col {
    width: 100% !important;
    border-right: none !important;
    border-bottom: 1px solid var(--border-default) !important;
    padding-bottom: var(--space-md) !important;
  }

  .verdict-details-grid {
    grid-template-columns: 1fr !important;
    gap: var(--space-md) !important;
  }

  .arena-query-bar {
    flex-direction: column !important;
    gap: var(--space-sm) !important;
  }

  .arena-query-bar button {
    width: 100% !important;
  }

  .query-input-wrapper {
    flex-direction: column !important;
    gap: var(--space-sm) !important;
  }

  .query-input-wrapper select,
  .query-input-wrapper input,
  .query-input-wrapper button {
    width: 100% !important;
  }

  .score-col-bar {
    display: none !important; /* Hide visual score comparison bar to save screen width */
  }
}