/* ===========================================
   APOPHENIA - Digital War Room Theme
   Enhanced & Accessible Version
   =========================================== */

:root {
  /* Core Colors */
  --bg-primary: #000000;
  --bg-secondary: #0a0a0a;
  --bg-tertiary: #111111;
  --bg-card: #0d0d0d;

  /* Neon Accents */
  --neon-green: #00ff9d;
  --neon-green-dim: #00cc7d;
  --neon-pink: #ff006e;
  --neon-pink-dim: #cc0058;
  --neon-blue: #00d4ff;
  --neon-purple: #bf00ff;
  --neon-yellow: #ffe600;
  --neon-orange: #ff6b00;

  /* Text - Improved contrast */
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;
  --text-dim: #444444;

  /* Semantic Colors */
  --color-positive: #00ff9d;
  --color-negative: #ff006e;
  --color-warning: #ffe600;
  --color-info: #00d4ff;

  /* Gradients */
  --gradient-neon: linear-gradient(135deg, var(--neon-green), var(--neon-blue));
  --gradient-hot: linear-gradient(135deg, var(--neon-pink), var(--neon-purple));
  --gradient-sunset: linear-gradient(135deg, var(--neon-orange), var(--neon-pink));
  --gradient-heatmap-neg: linear-gradient(90deg, #ff006e, #440022);
  --gradient-heatmap-pos: linear-gradient(90deg, #004422, #00ff9d);

  /* Effects */
  --glow-green: 0 0 20px rgba(0, 255, 157, 0.5);
  --glow-pink: 0 0 20px rgba(255, 0, 110, 0.5);
  --glow-blue: 0 0 20px rgba(0, 212, 255, 0.5);

  /* Fonts */
  --font-display: 'Orbitron', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;

  /* Z-index layers */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 1000;
  --z-toast: 2000;
  --z-loading: 10000;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-mono);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Focus styles for accessibility */
:focus-visible {
  outline: 2px solid var(--neon-green);
  outline-offset: 2px;
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
}

/* Screen reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--neon-green);
  color: var(--bg-primary);
  padding: var(--space-sm) var(--space-md);
  font-weight: 700;
  z-index: var(--z-loading);
  text-decoration: none;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
}

/* Scanline Effect - Performance optimized */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    0deg,
    rgba(0, 0, 0, 0.1),
    rgba(0, 0, 0, 0.1) 1px,
    transparent 1px,
    transparent 2px
  );
  pointer-events: none;
  z-index: var(--z-loading);
  opacity: 0.3;
}

/* ===========================================
   Loading Screen
   =========================================== */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-loading);
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.fade-out {
  opacity: 0;
  visibility: hidden;
}

.loading-content {
  text-align: center;
  max-width: 400px;
  padding: var(--space-lg);
}

.loading-bar {
  width: 300px;
  height: 4px;
  background: var(--bg-tertiary);
  margin: var(--space-lg) auto;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.loading-progress {
  height: 100%;
  width: 0%;
  background: var(--gradient-neon);
  transition: width var(--transition-normal);
  box-shadow: var(--glow-green);
}

.loading-status {
  font-size: 0.75rem;
  color: var(--neon-green);
  letter-spacing: 2px;
  animation: blink 1s infinite;
}

/* ===========================================
   Glitch Text Effect
   =========================================== */
.glitch-text {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 3rem;
  color: var(--text-primary);
  position: relative;
  text-transform: uppercase;
  letter-spacing: 4px;
}

.glitch-text::before,
.glitch-text::after {
  content: attr(data-text);
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

.glitch-text::before {
  color: var(--neon-pink);
  animation: glitch-1 2s infinite linear alternate-reverse;
  clip-path: polygon(0 0, 100% 0, 100% 35%, 0 35%);
}

.glitch-text::after {
  color: var(--neon-blue);
  animation: glitch-2 3s infinite linear alternate-reverse;
  clip-path: polygon(0 65%, 100% 65%, 100% 100%, 0 100%);
}

@keyframes glitch-1 {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-2px); }
  40% { transform: translateX(2px); }
  60% { transform: translateX(-1px); }
  80% { transform: translateX(1px); }
}

@keyframes glitch-2 {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(2px); }
  40% { transform: translateX(-2px); }
  60% { transform: translateX(1px); }
  80% { transform: translateX(-1px); }
}

@keyframes blink {
  0%, 50%, 100% { opacity: 1; }
  25%, 75% { opacity: 0.5; }
}

/* ===========================================
   App Container
   =========================================== */
.app {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-lg);
}

.app.hidden {
  display: none;
}

/* ===========================================
   Header
   =========================================== */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--text-dim);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
  gap: var(--space-lg);
  position: sticky;
  top: 0;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(10px);
  z-index: var(--z-sticky);
  margin-left: calc(-1 * var(--space-lg));
  margin-right: calc(-1 * var(--space-lg));
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
}

.logo .glitch-text {
  font-size: 2rem;
  margin-bottom: var(--space-xs);
}

.tagline {
  font-size: 0.75rem;
  color: var(--text-secondary);
  letter-spacing: 3px;
  text-transform: uppercase;
}

/* Header Navigation */
.header-nav {
  display: flex;
  gap: var(--space-md);
}

.nav-link {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-decoration: none;
  letter-spacing: 2px;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  text-transform: uppercase;
}

.nav-link:hover,
.nav-link:focus {
  color: var(--neon-green);
  border-color: var(--neon-green);
}

.header-stats {
  display: flex;
  gap: var(--space-xl);
}

.stat {
  text-align: right;
}

.stat-value {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--neon-green);
  text-shadow: var(--glow-green);
}

.stat-label {
  font-size: 0.65rem;
  color: var(--text-secondary);
  letter-spacing: 2px;
}

/* ===========================================
   Buttons
   =========================================== */
.btn-neon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--neon-green);
  background: transparent;
  border: 2px solid var(--neon-green);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-transform: uppercase;
  text-decoration: none;
}

.btn-neon:hover,
.btn-neon:focus {
  background: var(--neon-green);
  color: var(--bg-primary);
  box-shadow: var(--glow-green);
}

.btn-neon:active {
  transform: scale(0.98);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--bg-primary);
  background: var(--neon-green);
  border: none;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-transform: uppercase;
}

.btn-primary:hover,
.btn-primary:focus {
  box-shadow: var(--glow-green);
  transform: translateY(-2px);
}

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

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid var(--text-dim);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.btn-ghost:hover,
.btn-ghost:focus {
  color: var(--neon-green);
  border-color: var(--neon-green);
}

/* ===========================================
   Serendipity Section
   =========================================== */
.serendipity-section {
  background: var(--bg-secondary);
  border: 1px solid var(--text-dim);
  border-radius: var(--radius-sm);
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
  position: relative;
  overflow: hidden;
}

.serendipity-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-neon);
}

.serendipity-header {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.badge {
  display: inline-block;
  padding: var(--space-xs) var(--space-md);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 2px;
  background: var(--neon-green);
  color: var(--bg-primary);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
}

.badge.pulse {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 255, 157, 0.4); }
  50% { box-shadow: 0 0 0 10px rgba(0, 255, 157, 0); }
}

.serendipity-header h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 400;
  letter-spacing: 2px;
}

.correlation-display {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.variable-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--text-dim);
  padding: var(--space-md) var(--space-lg);
  text-align: center;
  min-width: 200px;
  border-radius: var(--radius-sm);
  transition: border-color var(--transition-fast);
}

.variable-card:hover {
  border-color: var(--neon-green);
}

.variable-card .var-category {
  display: block;
  font-size: 0.65rem;
  color: var(--neon-pink);
  letter-spacing: 2px;
  margin-bottom: var(--space-xs);
  text-transform: uppercase;
}

.variable-card .var-name {
  display: block;
  font-size: 1rem;
  font-weight: 500;
}

.correlation-value {
  text-align: center;
}

.r-symbol {
  display: block;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.r-value {
  display: block;
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 900;
  background: var(--gradient-neon);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.serendipity-chart {
  height: 300px;
  margin-bottom: var(--space-lg);
}

.serendipity-chart canvas {
  width: 100% !important;
  height: 100% !important;
}

.serendipity-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* ===========================================
   Lab Section
   =========================================== */
.lab-section {
  margin-bottom: var(--space-xl);
}

.section-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 2px;
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.section-title .icon {
  color: var(--neon-green);
}

.section-desc {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: var(--space-lg);
}

.lab-controls {
  display: flex;
  align-items: flex-end;
  gap: var(--space-lg);
  flex-wrap: wrap;
  margin-bottom: var(--space-md);
}

.select-group {
  flex: 1;
  min-width: 200px;
}

.select-group label {
  display: block;
  font-size: 0.65rem;
  color: var(--neon-green);
  letter-spacing: 2px;
  margin-bottom: var(--space-sm);
}

.neon-select {
  width: 100%;
  padding: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-primary);
  background: var(--bg-secondary);
  border: 1px solid var(--text-dim);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--transition-fast);
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2300ff9d' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

.neon-select:focus {
  outline: none;
  border-color: var(--neon-green);
  box-shadow: 0 0 0 1px var(--neon-green);
}

.neon-select option {
  background: var(--bg-secondary);
  color: var(--text-primary);
  padding: var(--space-sm);
}

.neon-select optgroup {
  color: var(--neon-pink);
  font-weight: 700;
}

.vs-divider {
  padding: var(--space-md);
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--text-dim);
}

/* Lab Options */
.lab-options {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.toggle-option {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  cursor: pointer;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.toggle-option input[type="checkbox"] {
  appearance: none;
  width: 18px;
  height: 18px;
  border: 2px solid var(--text-dim);
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.toggle-option input[type="checkbox"]:checked {
  background: var(--neon-green);
  border-color: var(--neon-green);
}

.toggle-option input[type="checkbox"]:checked::after {
  content: '';
  position: absolute;
  left: 4px;
  top: 1px;
  width: 6px;
  height: 10px;
  border: solid var(--bg-primary);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.toggle-option input[type="checkbox"]:focus {
  outline: 2px solid var(--neon-blue);
  outline-offset: 2px;
}

.toggle-label {
  transition: color var(--transition-fast);
}

.toggle-option:hover .toggle-label {
  color: var(--text-primary);
}

/* Lab Results */
.lab-results {
  background: var(--bg-secondary);
  border: 1px solid var(--text-dim);
  border-radius: var(--radius-sm);
  padding: var(--space-lg);
}

.lab-results.hidden {
  display: none;
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
  gap: var(--space-md);
}

.result-correlation .label,
.result-pvalue .label {
  display: block;
  font-size: 0.65rem;
  color: var(--text-secondary);
  letter-spacing: 2px;
  margin-bottom: var(--space-xs);
  text-transform: uppercase;
}

.result-correlation .value {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 900;
  color: var(--neon-green);
  text-shadow: var(--glow-green);
}

.result-pvalue .value {
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--neon-blue);
}

.result-pvalue .value.significant {
  color: var(--neon-green);
}

.result-pvalue .value.not-significant {
  color: var(--text-muted);
}

.result-interpretation {
  font-size: 0.875rem;
  color: var(--text-secondary);
  max-width: 400px;
  text-align: right;
}

.result-interpretation .strength {
  display: block;
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--neon-green);
  margin-bottom: var(--space-xs);
}

.chart-container {
  position: relative;
}

.result-chart,
.scatter-chart {
  height: 400px;
  margin-bottom: var(--space-lg);
}

.result-chart canvas,
.scatter-chart canvas {
  width: 100% !important;
  height: 100% !important;
}

.scatter-chart.hidden {
  display: none;
}

.result-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.stat-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--text-dim);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  text-align: center;
}

.stat-card .label {
  display: block;
  font-size: 0.65rem;
  color: var(--text-secondary);
  letter-spacing: 1px;
  margin-bottom: var(--space-xs);
  text-transform: uppercase;
}

.stat-card .value {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--neon-green);
}

.result-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* ===========================================
   Heatmap Section
   =========================================== */
.heatmap-section {
  margin-bottom: var(--space-xl);
}

.heatmap-container {
  background: var(--bg-secondary);
  border: 1px solid var(--text-dim);
  border-radius: var(--radius-sm);
  padding: var(--space-md);
  overflow-x: auto;
  margin-bottom: var(--space-md);
}

.heatmap-grid {
  display: grid;
  gap: 2px;
  min-width: max-content;
}

.heatmap-cell {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 500;
  border-radius: 2px;
  cursor: pointer;
  transition: transform var(--transition-fast);
  position: relative;
}

.heatmap-cell:hover {
  transform: scale(1.1);
  z-index: 10;
}

.heatmap-cell.header {
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.55rem;
  writing-mode: vertical-lr;
  text-orientation: mixed;
  transform: rotate(180deg);
  width: 50px;
  height: 80px;
}

.heatmap-cell.row-header {
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.55rem;
  justify-content: flex-end;
  padding-right: var(--space-sm);
  width: 100px;
  text-align: right;
}

.heatmap-cell.diagonal {
  background: var(--text-dim) !important;
  color: var(--text-muted);
}

.heatmap-legend {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
}

.legend-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.legend-gradient {
  width: 200px;
  height: 16px;
  background: linear-gradient(90deg,
    var(--neon-pink) 0%,
    var(--bg-tertiary) 50%,
    var(--neon-green) 100%
  );
  border-radius: var(--radius-sm);
}

/* ===========================================
   Matrix Section
   =========================================== */
.matrix-section {
  margin-bottom: var(--space-xl);
}

.matrix-filters {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
}

.filter-btn {
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  background: var(--bg-secondary);
  border: 1px solid var(--text-dim);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  letter-spacing: 1px;
}

.filter-btn:hover {
  border-color: var(--neon-green);
  color: var(--text-primary);
}

.filter-btn.active,
.filter-btn[aria-pressed="true"] {
  background: var(--neon-green);
  color: var(--bg-primary);
  border-color: var(--neon-green);
}

.matrix-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-md);
}

.matrix-card {
  background: var(--bg-secondary);
  border: 1px solid var(--text-dim);
  border-radius: var(--radius-sm);
  padding: var(--space-lg);
  transition: border-color var(--transition-normal), transform var(--transition-normal);
  cursor: pointer;
}

.matrix-card:hover {
  border-color: var(--neon-green);
  transform: translateY(-4px);
}

.matrix-card:focus {
  outline: 2px solid var(--neon-green);
  outline-offset: 2px;
}

.matrix-card.hidden {
  display: none;
}

.matrix-card .category {
  font-size: 0.65rem;
  color: var(--neon-pink);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.matrix-card[data-category="NATURE"] .category {
  color: var(--neon-blue);
}

.matrix-card[data-category="COSMOS"] .category {
  color: var(--neon-purple);
}

.matrix-card[data-category="GREED"] .category {
  color: var(--neon-yellow);
}

.matrix-card[data-category="SOCIETY"] .category {
  color: #00ffcc; /* Cyan for society */
}

.matrix-card[data-category="CHAOS"] .category {
  color: var(--neon-orange);
}

.matrix-card .name {
  font-family: var(--font-display);
  font-size: 1rem;
  margin-bottom: var(--space-sm);
}

.matrix-card .value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--neon-green);
}

.matrix-card .change {
  font-size: 0.75rem;
  margin-left: var(--space-sm);
}

.matrix-card .change.positive {
  color: var(--color-positive);
}

.matrix-card .change.negative {
  color: var(--color-negative);
}

.matrix-card .mini-chart {
  height: 60px;
  margin-top: var(--space-md);
}

/* ===========================================
   Toast Notification
   =========================================== */
.toast {
  position: fixed;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  border: 1px solid var(--neon-green);
  box-shadow: var(--glow-green);
  font-size: 0.875rem;
  z-index: var(--z-toast);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  max-width: 90vw;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  visibility: visible;
}

.toast.error {
  border-color: var(--neon-pink);
  box-shadow: var(--glow-pink);
}

.toast.warning {
  border-color: var(--neon-yellow);
}

/* ===========================================
   Footer
   =========================================== */
.footer {
  text-align: center;
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--text-dim);
  margin-top: var(--space-xl);
}

.footer-quote {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-style: italic;
  margin-bottom: var(--space-sm);
}

.footer-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: var(--space-sm);
}

.footer-disclaimer {
  color: var(--text-dim);
}

.footer a {
  color: var(--neon-green);
  text-decoration: none;
  transition: text-shadow var(--transition-fast);
}

.footer a:hover {
  text-decoration: underline;
  text-shadow: var(--glow-green);
}

/* ===========================================
   Responsive Design
   =========================================== */
@media (max-width: 1024px) {
  .header {
    padding: var(--space-md) var(--space-lg);
  }

  .header-nav {
    order: 3;
    width: 100%;
    justify-content: center;
  }

  .heatmap-cell {
    width: 40px;
    height: 40px;
    font-size: 0.55rem;
  }
}

@media (max-width: 768px) {
  :root {
    font-size: 14px;
  }

  .header {
    flex-direction: column;
    text-align: center;
    gap: var(--space-md);
    position: relative;
  }

  .header-nav {
    order: 2;
  }

  .header-stats {
    justify-content: center;
    order: 3;
  }

  .stat {
    text-align: center;
  }

  .logo .glitch-text {
    font-size: 1.5rem;
  }

  .correlation-display {
    flex-direction: column;
  }

  .variable-card {
    min-width: 100%;
  }

  .lab-controls {
    flex-direction: column;
  }

  .select-group {
    width: 100%;
  }

  .vs-divider {
    padding: var(--space-sm);
  }

  .result-header {
    flex-direction: column;
    text-align: center;
  }

  .result-interpretation {
    text-align: center;
    max-width: 100%;
  }

  .serendipity-section,
  .lab-results {
    padding: var(--space-md);
  }

  .result-chart,
  .scatter-chart {
    height: 300px;
  }

  .matrix-grid {
    grid-template-columns: 1fr;
  }

  .heatmap-container {
    padding: var(--space-sm);
  }

  .heatmap-cell {
    width: 35px;
    height: 35px;
    font-size: 0.5rem;
  }

  .heatmap-cell.row-header {
    width: 70px;
  }
}

@media (max-width: 480px) {
  .app {
    padding: var(--space-md);
  }

  .glitch-text {
    font-size: 1.5rem;
    letter-spacing: 2px;
  }

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

  .section-title {
    font-size: 1.25rem;
  }

  .r-value {
    font-size: 2rem;
  }

  .btn-neon,
  .btn-primary {
    width: 100%;
    padding: var(--space-md);
  }

  .serendipity-actions {
    flex-direction: column;
  }

  .result-actions {
    flex-direction: column;
  }

  .result-actions .btn-ghost {
    width: 100%;
  }

  .matrix-filters {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: var(--space-sm);
  }

  .filter-btn {
    flex-shrink: 0;
  }

  .heatmap-cell {
    width: 30px;
    height: 30px;
  }

  .heatmap-cell.row-header {
    width: 60px;
  }
}

/* ===========================================
   Print Styles
   =========================================== */
@media print {
  body::before {
    display: none;
  }

  .loading-screen,
  .header-nav,
  .btn-neon,
  .btn-primary,
  .btn-ghost,
  .lab-controls,
  .lab-options,
  .matrix-filters,
  .serendipity-actions,
  .result-actions {
    display: none !important;
  }

  .app {
    max-width: 100%;
  }

  .header {
    position: static;
    background: white;
  }

  body {
    background: white;
    color: black;
  }

  .glitch-text::before,
  .glitch-text::after {
    display: none;
  }
}

/* ===========================================
   Utility Classes
   =========================================== */
.text-green { color: var(--neon-green); }
.text-pink { color: var(--neon-pink); }
.text-blue { color: var(--neon-blue); }
.text-yellow { color: var(--neon-yellow); }
.text-muted { color: var(--text-secondary); }

.glow-green { text-shadow: var(--glow-green); }
.glow-pink { text-shadow: var(--glow-pink); }
.glow-blue { text-shadow: var(--glow-blue); }

.hidden { display: none !important; }
.invisible { visibility: hidden; }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

/* Animation for data updates */
@keyframes data-update {
  0% { background-color: rgba(0, 255, 157, 0.2); }
  100% { background-color: transparent; }
}

.data-updated {
  animation: data-update 1s ease-out;
}

/* Shimmer loading effect */
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.shimmer {
  background: linear-gradient(90deg,
    var(--bg-tertiary) 25%,
    var(--bg-secondary) 50%,
    var(--bg-tertiary) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}