/**
 * F-032.7: Practice Section - Flashcards + Quiz Cards
 * Clean two-card layout with glassmorphism effects
 *
 * Design Requirements:
 * - Two large cards side-by-side (desktop) / stacked (mobile)
 * - Glassmorphism: 70% opacity + 10px blur
 * - Feature-colored accents (purple/flashcards, blue/quiz)
 * - Hover effects: lift + scale + glow
 * - SVG icons (NO emojis)
 * - Stats badges in cards
 * - Responsive design
 */

/* ==============================================
   Practice Section Container
   ============================================== */
.practice-section {
  margin-bottom: var(--space-xl);
}

.practice-section .section-title {
  margin-bottom: var(--space-lg);
}

/* ==============================================
   Two-Card Grid Layout
   ============================================== */
.practice-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

/* ==============================================
   Large Feature Cards
   ============================================== */
.practice-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 280px;
  padding: var(--space-xl);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-normal);
  cursor: pointer;
  overflow: hidden;

  /* Glassmorphism effect */
  background: rgba(var(--bg-card-rgb), 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px); /* Safari support */
}

/* Light theme glass borders */
[data-theme="light"] .practice-card {
  border: 1px solid rgba(0, 0, 0, 0.18);
  --bg-card-rgb: 255, 255, 255;
}

/* Dark theme glass borders */
[data-theme="dark"] .practice-card {
  border: 1px solid rgba(255, 255, 255, 0.1);
  --bg-card-rgb: 26, 32, 44;
}

/* ==============================================
   Hover Effects: Lift + Scale + Glow
   ============================================== */
.practice-card:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow:
    0 8px 24px rgba(0, 0, 0, 0.15),
    0 0 0 1px var(--practice-accent, var(--accent));
}

/* C2-001: Use design tokens for feature colors */
.practice-card-flashcards:hover {
  box-shadow:
    0 8px 24px rgba(139, 92, 246, 0.25),
    0 0 0 1px var(--feature-flashcards);
}

.practice-card-quiz:hover {
  box-shadow:
    0 8px 24px rgba(59, 130, 246, 0.25),
    0 0 0 1px var(--feature-quiz);
}

/* Disabled state - no hover effects */
.practice-card-disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

.practice-card-disabled:hover {
  transform: none;
  box-shadow: none;
}

/* ==============================================
   Icon Container with Feature Colors
   ============================================== */
.practice-card-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.practice-card:hover .practice-card-icon {
  transform: scale(1.05);
}

/* Purple accent for Flashcards - C2-001: Use design tokens */
.practice-card-flashcards .practice-card-icon {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(139, 92, 246, 0.1));
  color: var(--feature-flashcards);
}

/* Blue accent for Quiz - C2-001: Use design tokens */
.practice-card-quiz .practice-card-icon {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(59, 130, 246, 0.1));
  color: var(--feature-quiz);
}

.practice-card-icon svg {
  width: 36px;
  height: 36px;
}

/* ==============================================
   Card Content
   ============================================== */
.practice-card-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.practice-card-title {
  font-size: var(--font-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 var(--space-xs) 0;
}

.practice-card-desc {
  font-size: var(--font-base);
  color: var(--text-secondary);
  margin: 0 0 var(--space-md) 0;
  line-height: 1.5;
}

/* ==============================================
   Stats Badges
   ============================================== */
.practice-card-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: auto;
}

.practice-stat-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-sm);
  background: rgba(var(--badge-bg-rgb), 0.1);
  border: 1px solid rgba(var(--badge-bg-rgb), 0.2);
  border-radius: var(--radius-md);
  font-size: var(--font-sm);
  font-weight: 500;
  color: var(--text-secondary);
}

.practice-stat-badge-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* Feature-colored stats */
.practice-card-flashcards .practice-stat-badge {
  --badge-bg-rgb: 139, 92, 246;
}

.practice-card-quiz .practice-stat-badge {
  --badge-bg-rgb: 59, 130, 246;
}

/* ==============================================
   CTA Button with Arrow Icon
   ============================================== */
.practice-card-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  margin-top: var(--space-md);
  font-size: var(--font-base);
  font-weight: 600;
  color: var(--practice-accent, var(--accent));
  transition: gap var(--transition-fast);
}

.practice-card:hover .practice-card-cta {
  gap: var(--space-sm);
}

.practice-card-flashcards .practice-card-cta {
  color: var(--feature-flashcards);
}

.practice-card-quiz .practice-card-cta {
  color: var(--feature-quiz);
}

.practice-card-cta svg {
  width: 18px;
  height: 18px;
}

/* ==============================================
   Coming Soon Badge (for Quiz)
   ============================================== */
.practice-card-badge {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  background: linear-gradient(135deg, #6b7280, #4b5563);
  color: white;
  font-size: var(--font-xs);
  font-weight: 600;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-md);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ==============================================
   Responsive Design
   ============================================== */

/* Tablet: Smaller cards, still side-by-side */
@media (max-width: 768px) {
  .practice-card {
    min-height: 240px;
    padding: var(--space-lg);
  }

  .practice-card-icon {
    width: 56px;
    height: 56px;
  }

  .practice-card-icon svg {
    width: 32px;
    height: 32px;
  }

  .practice-card-title {
    font-size: var(--font-lg);
  }
}

/* Mobile: Stack cards vertically */
@media (max-width: 640px) {
  .practice-cards-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .practice-card {
    min-height: auto;
    padding: var(--space-lg);
  }

  .practice-card-icon {
    width: 48px;
    height: 48px;
  }

  .practice-card-icon svg {
    width: 28px;
    height: 28px;
  }

  .practice-card-title {
    font-size: var(--font-base);
  }

  .practice-card-desc {
    font-size: var(--font-sm);
  }

  .practice-card-badge {
    top: var(--space-md);
    right: var(--space-md);
  }
}

/* ==============================================
   Loading State
   ============================================== */
.practice-card-loading .practice-stat-badge {
  background: var(--bg-hover);
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

/* ==============================================
   Dark/Light Theme Support
   ============================================== */

/* Ensure glassmorphism works in both themes */
[data-theme="light"] .practice-card {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .practice-card {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* Accessible focus states */
.practice-card:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* Respect reduced motion preferences */
@media (prefers-reduced-motion: reduce) {
  .practice-card,
  .practice-card-icon,
  .practice-card-cta {
    transition: none;
  }

  .practice-card:hover {
    transform: none;
  }
}