/*
 * Hierarchy Styles (Categories, Subcategories, Videos)
 */

.hierarchy-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  overflow: hidden;
}

/* Category grid */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(340px, 100%), 1fr));
  gap: var(--spacing-md);
  max-width: 100%;
}

/* Category card */
.category-card {
  padding: var(--spacing-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  min-width: 0;
  max-width: 100%;
}

.category-card:hover {
  background: var(--glass-bg-hover);
}

.category-card.expanded {
  grid-column: 1 / -1;
}

.category-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.category-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(91, 141, 184, 0.15);
  border: 1px solid rgba(91, 141, 184, 0.25);
  border-radius: var(--radius-md);
  color: var(--accent-tertiary);
  padding: 10px;
}

.category-icon svg {
  width: 100%;
  height: 100%;
}

.category-info {
  flex: 1;
  min-width: 0;
}

.category-title {
  font-size: var(--font-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.category-description {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.5;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.category-expand-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--text-tertiary);
  transition: transform var(--transition-base);
}

.category-expand-icon svg {
  width: 100%;
  height: 100%;
}

.category-card.expanded .category-expand-icon {
  transform: rotate(180deg);
}

/* Subcategories container */
.subcategories-container {
  margin-top: var(--spacing-lg);
  display: none;
}

.category-card.expanded .subcategories-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(280px, 100%), 1fr));
  gap: var(--spacing-sm);
  max-width: 100%;
  overflow: hidden;
}

/* Subcategory card */
.subcategory-card {
  padding: var(--spacing-md);
  cursor: pointer;
  transition: all var(--transition-base);
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
  min-width: 0;
  max-width: 100%;
  overflow: hidden;
}

.subcategory-card:hover {
  background: rgba(255, 255, 255, 0.08);
}

.subcategory-card.expanded {
  grid-column: 1 / -1;
}

.subcategory-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.subcategory-icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  padding: 4px;
}

.subcategory-icon svg {
  width: 100%;
  height: 100%;
}

.subcategory-info {
  flex: 1;
  min-width: 0;
}

.subcategory-title {
  font-size: var(--font-base);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.subcategory-description {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  line-height: 1.4;
  word-wrap: break-word;
  overflow-wrap: break-word;
}

.subcategory-expand-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--text-tertiary);
  transition: transform var(--transition-base);
}

.subcategory-expand-icon svg {
  width: 100%;
  height: 100%;
}

.subcategory-card.expanded .subcategory-expand-icon {
  transform: rotate(180deg);
}

/* Videos container */
.videos-container {
  margin-top: var(--spacing-md);
  display: none;
}

.subcategory-card.expanded .videos-container {
  display: block;
}

/* Video list */
.video-list {
  display: grid;
  gap: var(--spacing-sm);
}

.video-item {
  padding: var(--spacing-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  min-width: 0;
  max-width: 100%;
}

.video-item:hover {
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 4px 16px var(--glass-shadow);
}

.video-item.active {
  background: rgba(91, 141, 184, 0.15);
  border-color: var(--accent-primary);
}

.video-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-icon svg {
  width: 100%;
  height: 100%;
}

.video-info {
  flex: 1;
  min-width: 0;
}

.video-title {
  font-size: var(--font-base);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.video-description {
  font-size: var(--font-sm);
  color: var(--text-secondary);
  word-wrap: break-word;
  overflow-wrap: break-word;
}

/* Video share button */
.video-share-btn {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--text-tertiary);
  cursor: pointer;
  transition: all var(--transition-fast);
  opacity: 0;
}

.video-item:hover .video-share-btn {
  opacity: 1;
}

.video-share-btn:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border);
  color: var(--accent-primary);
}

/* Count badges */
.count-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 24px;
  height: 24px;
  padding: 0 var(--spacing-xs);
  background: var(--glass-bg-hover);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  font-size: var(--font-xs);
  font-weight: 600;
  color: var(--text-secondary);
}

/* Empty state */
.hierarchy-empty {
  text-align: center;
  padding: var(--spacing-2xl);
  color: var(--text-tertiary);
}

.hierarchy-empty-icon {
  font-size: var(--font-5xl);
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

.hierarchy-empty-title {
  font-size: var(--font-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
}

.hierarchy-empty-description {
  font-size: var(--font-base);
  color: var(--text-tertiary);
}

/* Loading skeleton */
.hierarchy-skeleton {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

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

.skeleton-category {
  height: 120px;
  margin-bottom: var(--spacing-md);
  border-radius: var(--radius-lg);
  background: var(--glass-bg);
}

/* Responsive design */
@media (max-width: 768px) {
  .hierarchy-container {
    padding: 0 var(--spacing-md);
  }

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

  .category-card {
    padding: var(--spacing-md);
  }

  .category-icon {
    width: 40px;
    height: 40px;
    padding: 8px;
  }

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

  .category-card.expanded .subcategories-container {
    grid-template-columns: 1fr;
  }

  .subcategory-card {
    padding: var(--spacing-sm);
  }

  .subcategory-title {
    font-size: var(--font-sm);
  }
}

@media (max-width: 480px) {
  .hierarchy-container {
    padding: 0 var(--spacing-sm);
  }

  .category-card {
    padding: var(--spacing-sm);
  }

  .category-icon {
    width: 36px;
    height: 36px;
    padding: 6px;
  }

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

  .category-description {
    font-size: var(--font-xs);
  }

  .subcategory-icon {
    width: 24px;
    height: 24px;
  }

  .subcategory-description,
  .video-description {
    display: none;
  }

  .video-title {
    font-size: var(--font-sm);
  }

  .video-icon {
    width: 22px;
    height: 22px;
  }

  .video-item {
    padding: var(--spacing-sm);
    gap: var(--spacing-sm);
  }

  .video-share-btn {
    opacity: 1;
    width: 28px;
    height: 28px;
  }
}