/* ============================================
   CARDS & HOME GRID STYLES
   ============================================ */

/* Home Container */
.home-container {
  max-width: 1400px;
  margin: 0 auto;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 3rem 1rem;
  margin-bottom: 2rem;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2rem;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 3rem;
  margin-top: 2rem;
}

.hero-stat {
  text-align: center;
}

.hero-stat-value {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
}

.hero-stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Filters Bar - Centrado */
.filters-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: var(--dark-surface);
  border-radius: var(--radius-lg);
}

.filters-left {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.filter-btn {
  padding: 0.5rem 1rem;
  background: var(--dark-card);
  border: 1px solid var(--dark-border-solid);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.filter-btn:hover {
  background: var(--dark-card-hover);
  color: var(--text-primary);
}

.filter-btn.active {
  background: rgba(108, 99, 255, 0.15);
  border-color: var(--primary);
  color: var(--primary);
}

.filters-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.view-toggle {
  display: flex;
  background: var(--dark-card);
  border-radius: var(--radius-md);
  padding: 0.25rem;
}

.view-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.view-btn.active {
  background: var(--primary);
  color: white;
}

/* Tutorial Grid - Centrado */
.tutorial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 360px));
  gap: 1.5rem;
  justify-content: center;
  justify-items: stretch;
  max-width: 1200px;
  margin: 0 auto;
}

.tutorial-grid.list-view {
  grid-template-columns: 1fr;
}

/* Tutorial Card */
.tutorial-card {
  background: var(--dark-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--dark-border-solid);
  transition: var(--transition-slow);
  cursor: pointer;
}

.tutorial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
  border-color: var(--dark-border);
}

.tutorial-card:hover .card-thumbnail::after {
  opacity: 1;
}

.tutorial-card:hover .card-thumbnail img {
  transform: scale(1.05);
}

/* Card Thumbnail */
.card-thumbnail {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: linear-gradient(135deg, var(--dark-surface) 0%, var(--dark-card) 100%);
}

.card-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.card-thumbnail::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13, 17, 23, 0.8) 0%, transparent 50%);
  opacity: 0.7;
  transition: opacity 0.3s ease;
}

/* Placeholder Thumbnail */
.card-thumbnail-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--secondary) 100%);
  position: relative;
  overflow: hidden;
}

.card-thumbnail-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.card-thumbnail-placeholder i {
  font-size: 3rem;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 0.5rem;
}

.card-thumbnail-placeholder span {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.7);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* Card Badges */
.card-badges {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  right: 0.75rem;
  display: flex;
  justify-content: space-between;
  z-index: 2;
}

.card-badge {
  padding: 0.25rem 0.625rem;
  font-size: 0.625rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-sm);
}

.card-badge-category {
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  color: white;
}

.card-badge-level {
  font-size: 0.625rem;
}

/* Card Progress */
.card-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: rgba(0, 0, 0, 0.3);
  z-index: 2;
}

.card-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
  transition: width 0.3s ease;
}

/* Card Content */
.card-content {
  padding: 1.25rem;
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-description {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Card Meta */
.card-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.card-meta-item {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.card-meta-item i {
  font-size: 0.875rem;
}

/* Card Footer */
.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.875rem 1.25rem;
  border-top: 1px solid var(--dark-border-solid);
  background: var(--dark-surface);
}

.card-author {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.card-author-avatar {
  width: 24px;
  height: 24px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.625rem;
  color: white;
  font-weight: 600;
}

.card-action {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

/* List View Card */
.tutorial-grid.list-view .tutorial-card {
  display: grid;
  grid-template-columns: 240px 1fr auto;
  align-items: stretch;
}

.tutorial-grid.list-view .card-thumbnail {
  aspect-ratio: auto;
}

.tutorial-grid.list-view .card-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.tutorial-grid.list-view .card-footer {
  flex-direction: column;
  justify-content: center;
  gap: 0.75rem;
  border-top: none;
  border-left: 1px solid var(--dark-border-solid);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
}

.empty-state-icon {
  width: 80px;
  height: 80px;
  background: var(--dark-surface);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
}

.empty-state-icon i {
  font-size: 2rem;
  color: var(--text-muted);
}

.empty-state-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.empty-state-text {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* Loading State */
.loading-skeleton {
  background: linear-gradient(90deg, var(--dark-card) 25%, var(--dark-surface) 50%, var(--dark-card) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-card {
  background: var(--dark-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.skeleton-thumbnail {
  aspect-ratio: 16 / 9;
  background: var(--dark-surface);
}

.skeleton-content {
  padding: 1.25rem;
}

.skeleton-title {
  height: 24px;
  margin-bottom: 0.75rem;
}

.skeleton-text {
  height: 16px;
  margin-bottom: 0.5rem;
}

.skeleton-text.short {
  width: 60%;
}

/* Section Title */
.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
}

.section-title h2 {
  font-size: 1.5rem;
  font-weight: 600;
}

.section-title-link {
  font-size: 0.875rem;
  color: var(--primary);
}

/* Responsive */
@media (max-width: 768px) {
  .tutorial-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-title {
    font-size: 1.875rem;
  }
  
  .hero-stats {
    gap: 1.5rem;
  }
  
  .filters-bar {
    flex-direction: column;
    align-items: stretch;
  }
  
  .filters-left {
    overflow-x: auto;
    padding-bottom: 0.5rem;
  }
  
  .tutorial-grid.list-view .tutorial-card {
    grid-template-columns: 1fr;
  }
  
  .tutorial-grid.list-view .card-thumbnail {
    aspect-ratio: 16 / 9;
  }
  
  .tutorial-grid.list-view .card-footer {
    border-left: none;
    border-top: 1px solid var(--dark-border-solid);
    flex-direction: row;
  }
}