/* =================================
    QUIZ STYLES
   ================================= */

/* CSS Custom Properties */
:root {
  /* Modern Color Palette */
  --quiz-primary: #3b82f6;
  --quiz-primary-hover: #2563eb;
  --quiz-primary-light: #dbeafe;
  --quiz-secondary: #64748b;
  --quiz-success: #10b981;
  --quiz-success-light: #d1fae5;
  --quiz-danger: #ef4444;
  --quiz-danger-light: #fee2e2;
  --quiz-warning: #f59e0b;
  --quiz-info: #06b6d4;
  --quiz-info-light: #cffafe;

  /* Modern Grays */
  --quiz-gray-50: #f8fafc;
  --quiz-gray-100: #f1f5f9;
  --quiz-gray-200: #e2e8f0;
  --quiz-gray-300: #cbd5e1;
  --quiz-gray-400: #94a3b8;
  --quiz-gray-500: #64748b;
  --quiz-gray-600: #475569;
  --quiz-gray-700: #334155;
  --quiz-gray-800: #1e293b;
  --quiz-gray-900: #0f172a;

  /* Background & Surface */
  --quiz-bg-primary: #ffffff;
  --quiz-bg-secondary: #f8fafc;
  --quiz-bg-accent: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --quiz-surface: #ffffff;
  --quiz-surface-elevated: #ffffff;

  /* Text Colors */
  --quiz-text-primary: #1e293b;
  --quiz-text-secondary: #64748b;
  --quiz-text-muted: #94a3b8;
  --quiz-text-inverse: #ffffff;

  /* Modern Gradients */
  --quiz-gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --quiz-gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --quiz-gradient-card: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
  --quiz-gradient-button: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);

  /* Spacing */
  --quiz-space-xs: 0.25rem;
  --quiz-space-sm: 0.5rem;
  --quiz-space-md: 1rem;
  --quiz-space-lg: 1.5rem;
  --quiz-space-xl: 2rem;
  --quiz-space-2xl: 3rem;
  --quiz-space-3xl: 4rem;

  /* Border Radius */
  --quiz-radius-sm: 0.375rem;
  --quiz-radius-md: 0.5rem;
  --quiz-radius-lg: 0.75rem;
  --quiz-radius-xl: 1rem;
  --quiz-radius-2xl: 1.5rem;
  --quiz-radius-3xl: 2rem;

  /* Modern Shadows */
  --quiz-shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --quiz-shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --quiz-shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --quiz-shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --quiz-shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  --quiz-shadow-colored: 0 10px 15px -3px rgb(59 130 246 / 0.1), 0 4px 6px -4px rgb(59 130 246 / 0.1);

  /* Transitions */
  --quiz-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --quiz-transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --quiz-transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Typography */
  --quiz-font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --quiz-font-family-heading: 'Poppins', var(--quiz-font-family-primary);
  --quiz-font-size-xs: 0.75rem;
  --quiz-font-size-sm: 0.875rem;
  --quiz-font-size-base: 1rem;
  --quiz-font-size-lg: 1.125rem;
  --quiz-font-size-xl: 1.25rem;
  --quiz-font-size-2xl: 1.5rem;
  --quiz-font-size-3xl: 1.875rem;
  --quiz-font-size-4xl: 2.25rem;

  /* Z-index */
  --quiz-z-dropdown: 1000;
  --quiz-z-sticky: 1020;
  --quiz-z-fixed: 1030;
  --quiz-z-modal: 1050;
  --quiz-z-popover: 1060;
  --quiz-z-tooltip: 1070;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --quiz-bg-primary: #0f172a;
    --quiz-bg-secondary: #1e293b;
    --quiz-surface: #1e293b;
    --quiz-surface-elevated: #334155;
    --quiz-text-primary: #f1f5f9;
    --quiz-text-secondary: #94a3b8;
    --quiz-text-muted: #64748b;
    --quiz-gray-100: #334155;
    --quiz-gray-200: #475569;
    --quiz-gradient-card: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  }
}

/* =================================
     BASE STYLES
     ================================= */

body.quiz-page {
  font-family: var(--quiz-font-family-primary);
  line-height: 1.6;
  color: var(--quiz-text-primary);
  background: var(--quiz-bg-secondary);
}

/* =================================
     ENHANCED HERO SECTION
     ================================= */

.page-title {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--quiz-gradient-primary);
}

.page-title::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
}

.page-title .container {
  position: relative;
  z-index: 2;
  color: var(--quiz-text-inverse);
  text-align: center;
}

.page-title h1 {
  font-family: var(--quiz-font-family-heading);
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 700;
  margin-bottom: var(--quiz-space-lg);
  text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.page-subtitle {
  font-size: var(--quiz-font-size-lg);
  font-weight: 400;
  margin-bottom: var(--quiz-space-xl);
  opacity: 0.95;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* =================================
     QUIZ SECTION
     ================================= */

.quiz-section {
  padding: var(--quiz-space-3xl) 0;
  min-height: calc(100vh - 200px);
  background: var(--quiz-bg-secondary);
}

.section-header {
  margin-bottom: var(--quiz-space-3xl);
}

.section-title {
  font-family: var(--quiz-font-family-heading);
  font-size: var(--quiz-font-size-3xl);
  font-weight: 700;
  color: var(--quiz-text-primary);
  margin-bottom: var(--quiz-space-md);
  text-align: center;
}

.section-subtitle {
  font-size: var(--quiz-font-size-lg);
  color: var(--quiz-text-secondary);
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

/* =================================
        QUIZ OPTION CARDS
     ================================= */

.quiz-options {
  margin-bottom: var(--quiz-space-3xl);
}

.quiz-option-card {
  position: relative;
  background: var(--quiz-gradient-card);
  border: 1px solid var(--quiz-gray-200);
  border-radius: var(--quiz-radius-2xl);
  padding: 0;
  cursor: pointer;
  transition: all var(--quiz-transition-normal);
  height: 100%;
  overflow: hidden;
  box-shadow: var(--quiz-shadow-lg);
  backdrop-filter: blur(10px);
}

.quiz-option-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--quiz-gradient-primary);
  opacity: 0;
  transition: opacity var(--quiz-transition-normal);
  z-index: 1;
}

.quiz-option-card:hover,
.quiz-option-card:focus {
  border-color: var(--quiz-primary);
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--quiz-shadow-2xl), var(--quiz-shadow-colored);
  outline: none;
}

.quiz-option-card:hover::before,
.quiz-option-card:focus::before {
  opacity: 0.05;
}

.quiz-option-card:focus-visible {
  outline: 3px solid var(--quiz-primary);
  outline-offset: 4px;
}

.card-decoration {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--quiz-gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--quiz-transition-slow);
  z-index: 2;
}

.quiz-option-card:hover .card-decoration,
.quiz-option-card:focus .card-decoration {
  transform: scaleX(1);
}

.card-content {
  position: relative;
  z-index: 2;
  padding: var(--quiz-space-2xl);
  display: flex;
  flex-direction: column;
  height: 100%;
  text-align: center;
}

.card-icon {
  font-size: 4rem;
  background: var(--quiz-gradient-primary);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--quiz-space-lg);
  transition: transform var(--quiz-transition-normal);
}

.quiz-option-card:hover .card-icon {
  transform: scale(1.1) rotate(5deg);
}

.card-title {
  font-family: var(--quiz-font-family-heading);
  font-size: var(--quiz-font-size-xl);
  font-weight: 700;
  color: var(--quiz-text-primary);
  margin-bottom: var(--quiz-space-md);
}

.card-description {
  color: var(--quiz-text-secondary);
  margin-bottom: var(--quiz-space-lg);
  line-height: 1.6;
  flex-grow: 1;
}

.card-stats {
  display: flex;
  justify-content: center;
  gap: var(--quiz-space-lg);
  margin-bottom: var(--quiz-space-lg);
  padding: var(--quiz-space-md) 0;
  border-top: 1px solid var(--quiz-gray-200);
  border-bottom: 1px solid var(--quiz-gray-200);
}

.stat-item {
  display: flex;
  align-items: center;
  gap: var(--quiz-space-xs);
  font-size: var(--quiz-font-size-sm);
  color: var(--quiz-text-secondary);
  font-weight: 500;
}

.card-action {
  margin-top: auto;
}

.card-action .btn {
  background: var(--quiz-gradient-button);
  border: none;
  border-radius: var(--quiz-radius-xl);
  font-weight: 600;
  padding: var(--quiz-space-md) var(--quiz-space-xl);
  transition: all var(--quiz-transition-fast);
  color: white;
  position: relative;
  overflow: hidden;
}

.card-action .btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.card-action .btn:hover::before {
  left: 100%;
}

.card-action .btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--quiz-shadow-lg);
}

.card-action .btn-outline-primary {
  background: transparent;
  border: 2px solid var(--quiz-primary);
  color: var(--quiz-primary);
}

.card-action .btn-outline-primary:hover {
  background: var(--quiz-gradient-button);
  color: white;
  border-color: transparent;
}

/* =================================
     ENHANCED STATISTICS VIEW
     ================================= */

.stats-view {
  animation: slideInUp 0.6s ease-out;
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.stats-container {
  background: var(--quiz-gradient-card);
  border: 1px solid var(--quiz-gray-200);
  border-radius: var(--quiz-radius-2xl);
  padding: var(--quiz-space-2xl);
  box-shadow: var(--quiz-shadow-xl);
  backdrop-filter: blur(10px);
}

.stats-header {
  border-bottom: 1px solid var(--quiz-gray-200);
  padding-bottom: var(--quiz-space-lg);
}

.stats-title {
  font-family: var(--quiz-font-family-heading);
  font-size: var(--quiz-font-size-2xl);
  font-weight: 700;
  color: var(--quiz-text-primary);
  margin-bottom: var(--quiz-space-xs);
}

.stats-subtitle {
  font-size: var(--quiz-font-size-base);
  margin-bottom: 0;
  color: var(--quiz-text-inverse) !important;
}

.stats-grid {
  margin-top: var(--quiz-space-xl);
}

.stat-card {
  background: var(--quiz-gradient-card);
  border: 1px solid var(--quiz-gray-200);
  border-radius: var(--quiz-radius-xl);
  padding: var(--quiz-space-lg);
  transition: all var(--quiz-transition-normal);
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--quiz-space-md);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.1), transparent);
  transition: left 0.6s;
}

.stat-card:hover::before {
  left: 100%;
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--quiz-shadow-xl), var(--quiz-shadow-colored);
  border-color: var(--quiz-primary);
}

.stat-icon {
  flex-shrink: 0;
  width: 3.5rem;
  height: 3.5rem;
  background: var(--quiz-gradient-primary);
  color: var(--quiz-text-inverse);
  border-radius: var(--quiz-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: var(--quiz-shadow-md);
}

.stat-info {
  flex-grow: 1;
}

.stat-number {
  font-family: var(--quiz-font-family-heading);
  font-size: var(--quiz-font-size-2xl);
  font-weight: 800;
  background: var(--quiz-gradient-primary);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  margin-bottom: var(--quiz-space-xs);
}

.stat-label {
  font-size: var(--quiz-font-size-sm);
  color: var(--quiz-text-secondary);
  font-weight: 600;
  line-height: 1.2;
}

/* =================================
        HISTORIAL DE PARTIDAS
     ================================= */

/* Sección principal del historial */
.games-history {
  margin-top: var(--quiz-space-2xl);
  background: transparent;
}

/* Header del historial */
.history-header {
  border-bottom: 1px solid #334155;
  padding-bottom: var(--quiz-space-md);
  margin-bottom: var(--quiz-space-xl);
  background: transparent;
}

.history-title {
  font-family: var(--quiz-font-family-heading);
  font-size: var(--quiz-font-size-xl);
  font-weight: 700;
  color: #f1f5f9;
  margin-bottom: var(--quiz-space-xs);
  display: flex;
  align-items: center;
  gap: var(--quiz-space-sm);
}

.history-title i {
  color: #60a5fa;
}

.history-subtitle {
  font-size: var(--quiz-font-size-sm);
  color: var(--quiz-text-inverse) !important;
  margin-bottom: 0;
}

/* Lista de partidas*/
.games-list {
  max-height: 500px;
  overflow-y: auto;
  border-radius: var(--quiz-radius-xl);
  border: 2px solid #334155;
  background: #0f172a;
  box-shadow: 0 8px 32px -8px rgba(0, 0, 0, 0.4);
  padding: 0;
  position: relative;
}

/* Scrollbar personalizada para el tema oscuro */
.games-list::-webkit-scrollbar {
  width: 8px;
}

.games-list::-webkit-scrollbar-track {
  background: #1e293b;
  border-radius: var(--quiz-radius-md);
}

.games-list::-webkit-scrollbar-thumb {
  background: #475569;
  border-radius: var(--quiz-radius-md);
  transition: background var(--quiz-transition-fast);
}

.games-list::-webkit-scrollbar-thumb:hover {
  background: #64748b;
}

/* Items de partidas individuales */
.game-item {
  padding: var(--quiz-space-lg);
  border-bottom: 1px solid #334155;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all var(--quiz-transition-fast);
  position: relative;
  background: #0f172a;
  color: #e2e8f0;
}

.game-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 0;
  height: 100%;
  background: var(--quiz-gradient-primary);
  transition: width var(--quiz-transition-normal);
  z-index: 1;
}

.game-item:hover::before {
  width: 4px;
}

.game-item:last-child {
  border-bottom: none;
}

.game-item:hover {
  background: #1e293b;
  transform: translateX(4px);
  border-color: #475569;
}

/* Información del juego */
.game-info {
  flex-grow: 1;
  position: relative;
  z-index: 2;
}

.game-date {
  font-size: var(--quiz-font-size-sm);
  font-weight: 600;
  color: #f1f5f9;
  margin-bottom: var(--quiz-space-xs);
}

.game-details {
  font-size: var(--quiz-font-size-xs);
  color: #94a3b8;
  font-weight: 500;
}

/* Puntuación del juego */
.game-score {
  font-family: var(--quiz-font-family-heading);
  font-size: var(--quiz-font-size-lg);
  font-weight: 800;
  padding: var(--quiz-space-sm) var(--quiz-space-md);
  border-radius: var(--quiz-radius-lg);
  text-align: center;
  min-width: 80px;
  position: relative;
  z-index: 2;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.game-score.excellent {
  background: var(--quiz-gradient-success);
  color: white;
  border-color: #22c55e;
}

.game-score.good {
  background: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
  color: white;
  border-color: #06b6d4;
}

.game-score.fair {
  background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
  color: white;
  border-color: #f59e0b;
}

.game-score.poor {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  color: white;
  border-color: #ef4444;
}

/* Estado vacío */
.empty-state {
  text-align: center;
  padding: var(--quiz-space-3xl);
  color: #94a3b8;
  background: #0f172a;
  border-radius: var(--quiz-radius-xl);
  margin: 0;
}

.empty-state i {
  font-size: 5rem;
  margin-bottom: var(--quiz-space-lg);
  background: var(--quiz-gradient-primary);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: block;
}

.empty-state h4 {
  font-size: var(--quiz-font-size-lg);
  font-weight: 700;
  margin-bottom: var(--quiz-space-md);
  color: #f1f5f9;
  font-family: var(--quiz-font-family-heading);
}

.empty-state p {
  color: #94a3b8;
  font-size: var(--quiz-font-size-base);
  margin-bottom: 0;
  line-height: 1.6;
}

/* =================================
     RESPONSIVE DESIGN - MÓVIL
     ================================= */

@media (max-width: 991px) {
  .games-list {
    max-height: 400px;
    border: 1px solid #334155;
  }

  .game-item {
    padding: var(--quiz-space-md);
  }

  .empty-state {
    padding: var(--quiz-space-2xl);
  }

  .empty-state i {
    font-size: 4rem;
  }
}

@media (max-width: 767px) {
  .history-title {
    font-size: var(--quiz-font-size-lg);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--quiz-space-xs);
  }

  .games-list {
    max-height: 350px;
    border-radius: var(--quiz-radius-lg);
  }

  .game-item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--quiz-space-sm);
    padding: var(--quiz-space-md);
  }

  .game-item:hover {
    transform: none;
    padding-left: var(--quiz-space-md);
  }

  .game-item::before {
    display: none;
  }

  .game-score {
    align-self: flex-end;
    min-width: 70px;
    font-size: var(--quiz-font-size-base);
    padding: var(--quiz-space-xs) var(--quiz-space-sm);
  }

  .game-date {
    font-size: var(--quiz-font-size-xs);
  }

  .game-details {
    font-size: 11px;
  }

  .empty-state {
    padding: var(--quiz-space-xl);
  }

  .empty-state i {
    font-size: 3rem;
  }

  .empty-state h4 {
    font-size: var(--quiz-font-size-base);
  }

  .empty-state p {
    font-size: var(--quiz-font-size-sm);
  }
}

/* =================================
     MEJORAS DE ACCESIBILIDAD
     ================================= */

@media (prefers-reduced-motion: reduce) {

  .game-item,
  .game-item::before {
    transition: none;
  }

  .games-list::-webkit-scrollbar-thumb {
    transition: none;
  }
}

/* Para usuarios con daltonismo */
@media (prefers-contrast: high) {
  .games-list {
    border-width: 3px;
    border-color: #ffffff;
  }

  .game-item {
    border-bottom-width: 2px;
    border-bottom-color: #ffffff;
  }

  .game-score {
    border-width: 2px;
  }
}

/* Focus visible mejorado */
.game-item:focus-visible {
  outline: 3px solid #60a5fa;
  outline-offset: -3px;
  background: #1e293b;
}

/* Empty state enhancement */
.empty-state {
  text-align: center;
  padding: var(--quiz-space-3xl);
  color: var(--quiz-text-secondary);
}

.empty-state i {
  font-size: 5rem;
  margin-bottom: var(--quiz-space-lg);
  background: var(--quiz-gradient-primary);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.empty-state h4 {
  font-size: var(--quiz-font-size-lg);
  font-weight: 700;
  margin-bottom: var(--quiz-space-md);
  color: var(--quiz-text-primary);
}

/* =================================
     ENHANCED MODAL STYLES - DARK THEME
     ================================= */

#quizModal .modal-dialog {
  max-width: 950px;
}

#quizModal .modal-content {
  border: none;
  border-radius: var(--quiz-radius-2xl);
  box-shadow: var(--quiz-shadow-2xl);
  overflow: hidden;
  backdrop-filter: blur(20px);
  background: #1e293b;
  border: 1px solid #334155;
}

#quizModal .modal-header {
  background: var(--quiz-gradient-primary);
  color: var(--quiz-text-inverse);
  border-bottom: none;
  padding: var(--quiz-space-xl);
  position: relative;
}

#quizModal .modal-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
}

#quizModal .modal-title {
  font-family: var(--quiz-font-family-heading);
  font-size: var(--quiz-font-size-xl);
  font-weight: 700;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  color: white;
}

#quizModal .btn-close {
  filter: invert(1);
  opacity: 0.8;
  transition: all var(--quiz-transition-fast);
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--quiz-radius-md);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

#quizModal .btn-close:hover {
  opacity: 1;
  transform: scale(1.1);
  background: rgba(255, 255, 255, 0.2);
}

#quizModal .modal-body {
  padding: var(--quiz-space-2xl);
  background: #0f172a;
  min-height: 600px;
  display: flex;
  flex-direction: column;
}

#quizModal .modal-footer {
  background: #0f172a;
  border-top: 1px solid #334155;
  padding: var(--quiz-space-xl);
}

/* =================================
     ENHANCED QUIZ ELEMENTS - DARK THEME
     ================================= */

.quiz-progress-section {
  background: #1e293b;
  padding: var(--quiz-space-xl);
  border-radius: var(--quiz-radius-xl);
  margin-bottom: var(--quiz-space-xl);
  box-shadow: 0 8px 32px -8px rgba(0, 0, 0, 0.3);
  border: 2px solid #334155;
  position: relative;
  overflow: hidden;
}

.quiz-progress-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--quiz-gradient-primary);
}

.progress-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--quiz-space-md);
  font-weight: 600;
}

.question-indicator {
  color: #60a5fa;
  font-weight: 700;
  font-size: var(--quiz-font-size-lg);
  display: flex;
  align-items: center;
  gap: var(--quiz-space-xs);
}

.question-indicator::before {
  content: '🐠';
  font-size: 1.2em;
}

.progress-text {
  color: #94a3b8;
  font-size: var(--quiz-font-size-sm);
  background: #334155;
  padding: var(--quiz-space-xs) var(--quiz-space-sm);
  border-radius: var(--quiz-radius-md);
  border: 1px solid #475569;
}

.quiz-progress-bar {
  height: 14px;
  background: #334155;
  border-radius: var(--quiz-radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
}

.quiz-progress-bar .progress-bar {
  background: var(--quiz-gradient-primary);
  transition: width 0.6s ease;
  position: relative;
  overflow: hidden;
  border-radius: var(--quiz-radius-lg);
}

.quiz-progress-bar .progress-bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }

  100% {
    transform: translateX(100%);
  }
}

.question-section {
  background: #1e293b;
  padding: var(--quiz-space-xl);
  border-radius: var(--quiz-radius-xl);
  margin-bottom: var(--quiz-space-xl);
  box-shadow: 0 8px 32px -8px rgba(0, 0, 0, 0.3);
  border: 2px solid #334155;
  position: relative;
}

.question-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
  background: var(--quiz-gradient-primary);
  border-radius: var(--quiz-radius-sm);
}

.question-text {
  font-family: var(--quiz-font-family-heading);
  font-size: var(--quiz-font-size-xl);
  font-weight: 700;
  color: #f1f5f9;
  line-height: 1.4;
  margin-bottom: 0;
  margin-left: var(--quiz-space-lg);
}

.answers-section {
  margin-bottom: var(--quiz-space-xl);
  background: transparent;
  padding: 0;
  border-radius: 0;
}

.answers-container {
  display: grid;
  gap: var(--quiz-space-md);
  background: transparent;
}

.answer-button {
  background: #1e293b;
  border: 2px solid #475569;
  border-radius: var(--quiz-radius-xl);
  padding: var(--quiz-space-lg) var(--quiz-space-xl);
  text-align: left;
  cursor: pointer;
  transition: all var(--quiz-transition-normal);
  font-size: var(--quiz-font-size-base);
  font-weight: 500;
  color: #e2e8f0;
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  min-height: 60px;
  display: flex;
  align-items: center;
}

.answer-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(96, 165, 250, 0.2), transparent);
  transition: left 0.5s;
}

.answer-button::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 0;
  height: 100%;
  background: var(--quiz-gradient-primary);
  transition: width var(--quiz-transition-normal);
  opacity: 0.8;
}

.answer-button:hover::before {
  left: 100%;
}

.answer-button:hover:not(:disabled) {
  border-color: #60a5fa;
  background: #1e40af;
  transform: translateY(-2px) translateX(4px);
  box-shadow: 0 8px 32px -8px rgba(96, 165, 250, 0.4);
  color: #f1f5f9;
}

.answer-button:hover:not(:disabled)::after {
  width: 5px;
}

.answer-button:focus {
  outline: 3px solid #60a5fa;
  outline-offset: 2px;
}

.answer-button.selected {
  border-color: #60a5fa;
  background: #1e40af;
  color: #f1f5f9;
  box-shadow: 0 8px 32px -8px rgba(96, 165, 250, 0.4);
  transform: translateX(4px);
  font-weight: 600;
}

.answer-button.selected::after {
  width: 5px;
}

.answer-button.correct {
  border-color: #22c55e;
  background: #166534;
  color: #dcfce7;
  box-shadow: 0 8px 32px -8px rgba(34, 197, 94, 0.4);
  font-weight: 600;
}

.answer-button.correct::after {
  background: #22c55e;
  width: 5px;
}

.answer-button.incorrect {
  border-color: #ef4444;
  background: #991b1b;
  color: #fecaca;
  box-shadow: 0 8px 32px -8px rgba(239, 68, 68, 0.4);
  font-weight: 600;
}

.answer-button.incorrect::after {
  background: #ef4444;
  width: 5px;
}

/* =================================
     ENHANCED BUTTONS
     ================================= */

.btn-lg {
  padding: var(--quiz-space-md) var(--quiz-space-xl);
  font-size: var(--quiz-font-size-base);
  font-weight: 600;
  border-radius: var(--quiz-radius-xl);
  transition: all var(--quiz-transition-fast);
  position: relative;
  overflow: hidden;
}

.btn-success {
  background: var(--quiz-gradient-success);
  border: none;
  color: white;
}

.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: var(--quiz-shadow-lg);
}

.btn-outline-secondary {
  border: 2px solid var(--quiz-gray-300);
  color: var(--quiz-text-secondary);
  background: transparent;
}

.btn-outline-secondary:hover {
  background: var(--quiz-gray-100);
  transform: translateY(-2px);
  box-shadow: var(--quiz-shadow-md);
}

/* =================================
     ENHANCED RESPONSIVE DESIGN
     ================================= */

@media (max-width: 991px) {
  .page-title {
    min-height: 50vh;
  }

  .quiz-section {
    padding: var(--quiz-space-2xl) 0;
  }

  .section-title {
    font-size: var(--quiz-font-size-2xl);
  }

  .stats-container {
    padding: var(--quiz-space-xl);
  }

  .card-content {
    padding: var(--quiz-space-xl);
  }
}

/* Small screens - Enhanced Mobile Quiz Modal - DARK THEME */
@media (max-width: 767px) {
  .page-title {
    min-height: 40vh;
  }

  .page-title h1 {
    font-size: var(--quiz-font-size-2xl);
  }

  .quiz-section {
    padding: var(--quiz-space-xl) 0;
  }

  .section-title {
    font-size: var(--quiz-font-size-xl);
  }

  .card-content {
    padding: var(--quiz-space-lg);
  }

  .card-icon {
    font-size: 3rem;
  }

  .stats-container {
    padding: var(--quiz-space-lg);
  }

  .stat-card {
    padding: var(--quiz-space-md);
    flex-direction: column;
    text-align: center;
    gap: var(--quiz-space-sm);
  }

  .stat-icon {
    margin: 0 auto;
  }

  /* Enhanced Mobile Modal Styles - DARK THEME */
  #quizModal .modal-dialog {
    margin: var(--quiz-space-sm);
    max-width: none;
    width: calc(100% - 1rem);
  }

  #quizModal .modal-content {
    border-radius: var(--quiz-radius-xl);
    background: #1e293b;
    border: 1px solid #334155;
  }

  #quizModal .modal-header {
    padding: var(--quiz-space-lg);
  }

  #quizModal .modal-title {
    font-size: var(--quiz-font-size-lg);
    color: white;
  }

  #quizModal .modal-body {
    padding: var(--quiz-space-lg);
    background: #0f172a;
  }

  #quizModal .modal-footer {
    padding: var(--quiz-space-lg);
    background: #0f172a;
    border-top: 1px solid #334155;
  }

  .quiz-progress-section {
    padding: var(--quiz-space-lg);
    margin-bottom: var(--quiz-space-lg);
    background: #1e293b;
    border: 2px solid #334155;
  }

  .question-indicator {
    font-size: var(--quiz-font-size-base);
    color: #60a5fa;
  }

  .progress-text {
    background: #334155;
    border: 1px solid #475569;
    color: #94a3b8;
  }

  .question-section {
    padding: var(--quiz-space-lg);
    margin-bottom: var(--quiz-space-lg);
    background: #1e293b;
    border: 2px solid #334155;
  }

  .question-text {
    font-size: var(--quiz-font-size-lg);
    margin-left: var(--quiz-space-sm);
    color: #f1f5f9;
  }

  .answer-button {
    padding: var(--quiz-space-md) var(--quiz-space-lg);
    font-size: var(--quiz-font-size-sm);
    min-height: 50px;
    background: #1e293b;
    border: 2px solid #475569;
    color: #e2e8f0;
  }

  .answer-button:hover:not(:disabled) {
    background: #1e40af;
    border-color: #60a5fa;
    color: #f1f5f9;
  }

  .answer-button.selected {
    background: #1e40af;
    border-color: #60a5fa;
    color: #f1f5f9;
  }

  .feedback-section {
    padding: var(--quiz-space-lg);
    font-size: var(--quiz-font-size-sm);
  }

  .feedback-section.alert-success {
    background: #064e3b;
    color: #86efac;
    border: 2px solid #22c55e;
  }

  .feedback-section.alert-danger {
    background: #7f1d1d;
    color: #fca5a5;
    border: 2px solid #ef4444;
  }

  .countdown-container {
    padding: var(--quiz-space-md);
    margin-top: var(--quiz-space-lg);
    background: #1e293b;
    border: 2px solid #334155;
  }

  .countdown-text {
    color: #94a3b8;
  }

  .results-view {
    padding: var(--quiz-space-lg);
    margin: calc(-1 * var(--quiz-space-lg));
    margin-top: 0;
    background: #0f172a;
    border: 1px solid #334155;
  }

  .results-header {
    background: #1e293b;
    border: 1px solid #334155;
  }

  .results-title {
    font-size: var(--quiz-font-size-2xl);
    color: #f1f5f9;
  }

  .results-title::before,
  .results-title::after {
    display: none;
  }

  .final-score-display {
    font-size: var(--quiz-font-size-3xl);
    padding: var(--quiz-space-md);
  }

  .results-message {
    color: #94a3b8;
  }

  .questions-review {
    background: #1e293b;
    border: 1px solid #334155;
  }

  .review-title {
    color: #f1f5f9;
  }

  .review-container {
    border: 1px solid #475569;
    background: #0f172a;
  }

  .question-review-item {
    padding: var(--quiz-space-lg);
    border-bottom: 1px solid #334155;
  }

  .review-question-text {
    font-size: var(--quiz-font-size-sm);
    margin-left: var(--quiz-space-sm);
    color: #f1f5f9;
  }

  .review-answers {
    gap: var(--quiz-space-xs);
    margin-left: var(--quiz-space-sm);
  }

  .review-answer {
    padding: var(--quiz-space-sm);
    font-size: var(--quiz-font-size-xs);
  }

  .review-answer.correct {
    background: #064e3b;
    color: #86efac;
    border-color: #22c55e;
  }

  .review-answer.user-incorrect {
    background: #7f1d1d;
    color: #fca5a5;
    border-color: #ef4444;
  }

  .review-answer.neutral {
    background: #334155;
    color: #94a3b8;
    border-color: #475569;
  }

  .results-buttons {
    flex-direction: column;
    gap: var(--quiz-space-md);
  }

  .results-buttons .btn {
    width: 100%;
    min-width: auto;
  }

  .btn-success {
    background: var(--quiz-gradient-success);
  }

  .btn-outline-secondary {
    background: #1e293b;
    border: 2px solid #64748b;
    color: #e2e8f0;
  }

  .game-item {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--quiz-space-sm);
  }

  .game-score {
    align-self: flex-end;
    min-width: 60px;
  }
}

/* =================================
     ACCESSIBILITY ENHANCEMENTS
     ================================= */

@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .answer-button::before,
  .stat-card::before,
  .game-item::before {
    display: none;
  }
}

@media (prefers-contrast: high) {
  :root {
    --quiz-gray-200: #000000;
    --quiz-gray-300: #000000;
    --quiz-shadow-md: 0 0 0 2px #000000;
    --quiz-shadow-lg: 0 0 0 2px #000000;
    --quiz-shadow-xl: 0 0 0 3px #000000;
  }

  .quiz-option-card,
  .answer-button,
  .stat-card {
    border-width: 2px;
  }
}

:focus-visible {
  outline: 3px solid var(--quiz-primary);
  outline-offset: 2px;
  border-radius: var(--quiz-radius-sm);
}

.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;
}


/* =================================
     ENHANCED QUESTIONS REVIEW SECTION - DARK THEME
     ================================= */

.questions-review {
  background: #1e293b;
  border: 2px solid #334155;
  border-radius: var(--quiz-radius-xl);
  padding: var(--quiz-space-2xl);
  margin-top: var(--quiz-space-xl);
  box-shadow: 0 8px 32px -8px rgba(0, 0, 0, 0.4);
  position: relative;
  overflow: hidden;
}

.questions-review::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--quiz-gradient-primary);
}

.review-title {
  font-family: var(--quiz-font-family-heading);
  font-size: var(--quiz-font-size-xl);
  font-weight: 700;
  color: #f1f5f9;
  margin-bottom: var(--quiz-space-xl);
  display: flex;
  align-items: center;
  gap: var(--quiz-space-sm);
}

.review-title::before {
  content: '';
  width: 40px;
  height: 4px;
  background: var(--quiz-gradient-primary);
  border-radius: var(--quiz-radius-sm);
}

.review-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, #475569, transparent);
  margin-left: var(--quiz-space-md);
}

.review-container {
  background: #0f172a;
  border: 1px solid #334155;
  border-radius: var(--quiz-radius-lg);
  overflow: hidden;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

.question-review-item {
  padding: var(--quiz-space-xl);
  border-bottom: 1px solid #334155;
  transition: all var(--quiz-transition-normal);
  position: relative;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

.question-review-item:hover {
  background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
  transform: translateX(4px);
}

.question-review-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 0;
  height: 100%;
  background: var(--quiz-gradient-primary);
  transition: width var(--quiz-transition-normal);
}

.question-review-item:hover::before {
  width: 4px;
}

.question-review-item:last-child {
  border-bottom: none;
}

.review-question-header {
  display: flex;
  align-items: flex-start;
  gap: var(--quiz-space-md);
  margin-bottom: var(--quiz-space-lg);
}

.question-number-badge {
  background: var(--quiz-gradient-primary);
  color: white;
  font-weight: 700;
  font-size: var(--quiz-font-size-sm);
  padding: var(--quiz-space-xs) var(--quiz-space-sm);
  border-radius: var(--quiz-radius-lg);
  min-width: 32px;
  text-align: center;
  flex-shrink: 0;
  box-shadow: var(--quiz-shadow-md);
}

.review-question-text {
  font-family: var(--quiz-font-family-heading);
  font-size: var(--quiz-font-size-lg);
  font-weight: 600;
  color: #f1f5f9;
  line-height: 1.4;
  flex: 1;
  margin: 0;
}

.review-answers {
  display: grid;
  gap: var(--quiz-space-sm);
  margin-left: calc(32px + var(--quiz-space-md));
  /* Align with question text */
}

.review-answer {
  padding: var(--quiz-space-md) var(--quiz-space-lg);
  border-radius: var(--quiz-radius-lg);
  font-size: var(--quiz-font-size-sm);
  font-weight: 500;
  border: 2px solid;
  transition: all var(--quiz-transition-fast);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  gap: var(--quiz-space-sm);
  min-height: 48px;
}

.review-answer::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 0;
  height: 100%;
  transition: width var(--quiz-transition-normal);
  opacity: 0.3;
}

.review-answer:hover::before {
  width: 100%;
}

/* Correct Answer Styling */
.review-answer.correct {
  background: #064e3b;
  border-color: #22c55e;
  color: #86efac;
  box-shadow: 0 4px 12px rgba(34, 197, 94, 0.2);
}

.review-answer.correct::before {
  background: #22c55e;
}

.review-answer.correct::after {
  content: '✓';
  position: absolute;
  right: var(--quiz-space-md);
  font-size: var(--quiz-font-size-lg);
  font-weight: 700;
  color: #22c55e;
}

/* User Incorrect Answer Styling */
.review-answer.user-incorrect {
  background: #7f1d1d;
  border-color: #ef4444;
  color: #fca5a5;
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.2);
}

.review-answer.user-incorrect::before {
  background: #ef4444;
}

.review-answer.user-incorrect::after {
  content: '✗';
  position: absolute;
  right: var(--quiz-space-md);
  font-size: var(--quiz-font-size-lg);
  font-weight: 700;
  color: #ef4444;
}

/* Neutral Answer Styling */
.review-answer.neutral {
  background: #334155;
  border-color: #64748b;
  color: #cbd5e1;
  opacity: 0.7;
}

.review-answer.neutral::before {
  background: #64748b;
}

/* Answer Icons */
.answer-icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--quiz-font-size-xs);
  font-weight: 700;
  flex-shrink: 0;
}

.review-answer.correct .answer-icon {
  background: #22c55e;
  color: white;
}

.review-answer.user-incorrect .answer-icon {
  background: #ef4444;
  color: white;
}

.review-answer.neutral .answer-icon {
  background: #64748b;
  color: #cbd5e1;
}

/* Question Summary */
.question-summary {
  background: #334155;
  border: 1px solid #475569;
  border-radius: var(--quiz-radius-md);
  padding: var(--quiz-space-sm) var(--quiz-space-md);
  margin-top: var(--quiz-space-md);
  margin-left: calc(32px + var(--quiz-space-md));
  display: flex;
  align-items: center;
  gap: var(--quiz-space-sm);
  font-size: var(--quiz-font-size-xs);
}

.question-summary.correct {
  background: #064e3b;
  border-color: #22c55e;
  color: #86efac;
}

.question-summary.incorrect {
  background: #7f1d1d;
  border-color: #ef4444;
  color: #fca5a5;
}

.summary-icon {
  font-size: var(--quiz-font-size-sm);
}

/* Enhanced Mobile Responsive */
@media (max-width: 767px) {
  .questions-review {
    padding: var(--quiz-space-lg);
    margin-top: var(--quiz-space-lg);
    border: 1px solid #334155;
  }

  .review-title {
    font-size: var(--quiz-font-size-lg);
    margin-bottom: var(--quiz-space-lg);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--quiz-space-sm);
  }

  .review-title::before {
    width: 60px;
  }

  .review-title::after {
    display: none;
  }

  .question-review-item {
    padding: var(--quiz-space-lg);
  }

  .review-question-header {
    flex-direction: column;
    gap: var(--quiz-space-sm);
  }

  .question-number-badge {
    align-self: flex-start;
  }

  .review-question-text {
    font-size: var(--quiz-font-size-base);
  }

  .review-answers {
    margin-left: 0;
    gap: var(--quiz-space-xs);
  }

  .review-answer {
    padding: var(--quiz-space-sm) var(--quiz-space-md);
    font-size: var(--quiz-font-size-xs);
    min-height: 40px;
  }

  .review-answer::after {
    font-size: var(--quiz-font-size-base);
    right: var(--quiz-space-sm);
  }

  .question-summary {
    margin-left: 0;
    padding: var(--quiz-space-xs) var(--quiz-space-sm);
  }

  .answer-icon {
    width: 16px;
    height: 16px;
    font-size: 10px;
  }
}