/* =============================================================================
   Enhanced UI Components for WeDaita News & Blog
   Additional modern components and micro-interactions
   ============================================================================= */

/* Define CSS variables to prevent layout issues */
:root {
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
  
  --radius-sm: 0.25rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  
  --color-white: #ffffff;
  --color-slate-50: #f8fafc;
  --color-slate-100: #f1f5f9;
  --color-slate-200: #e2e8f0;
  --color-slate-300: #cbd5e1;
  --color-slate-400: #94a3b8;
  --color-slate-600: #475569;
  --color-primary: #1e3a8a;
  --color-primary-light: #3b82f6;
  --color-secondary: #059669;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  
  --gradient-blog: linear-gradient(135deg, #059669 0%, #047857 100%);
  --gradient-card-hover: linear-gradient(135deg, rgba(59, 130, 246, 0.1) 0%, rgba(37, 99, 235, 0.1) 100%);
}

/* Enhanced Featured Cards with Advanced Animations */
.featured-news-card, .featured-post-card {
  transform: translateY(0);
  transition: all var(--transition-slow);
  position: relative;
  z-index: 1;
}

.featured-news-card::after, .featured-post-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-card-hover);
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
  border-radius: inherit;
  z-index: -1;
}

.featured-news-card:hover, .featured-post-card:hover {
  transform: translateY(-12px) scale(1.02);
  z-index: 10;
}

.featured-news-card:hover::after, .featured-post-card:hover::after {
  opacity: 1;
}

.featured-news-card .card, .featured-post-card .card {
  border: none;
  box-shadow: var(--shadow-xl);
  border-radius: var(--radius-xl);
  overflow: hidden;
  backdrop-filter: blur(20px);
}

/* Advanced Search Component */
.advanced-search-container {
  background: linear-gradient(135deg, var(--color-white) 0%, var(--color-slate-50) 100%);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-slate-200);
  position: relative;
  overflow: hidden;
}

.advanced-search-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 2px;
  background: var(--gradient-blog);
  animation: slideIn 2s ease-out forwards;
}

@keyframes slideIn {
  to { left: 0; }
}

.search-input-group {
  position: relative;
  margin-bottom: var(--space-4);
}

.search-input-group input {
  width: 100%;
  padding: var(--space-4) var(--space-6) var(--space-4) var(--space-12);
  border: 2px solid var(--color-slate-200);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  font-weight: 500;
  background: var(--color-white);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

.search-input-group input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(30, 58, 138, 0.1), var(--shadow-md);
  transform: translateY(-1px);
}

.search-input-icon {
  position: absolute;
  left: var(--space-4);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-slate-400);
  font-size: var(--text-lg);
  pointer-events: none;
  transition: color var(--transition-fast);
}

.search-input-group input:focus + .search-input-icon {
  color: var(--color-primary);
}

/* Interactive Filter Chips */
.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
}

.filter-chip {
  padding: var(--space-2) var(--space-4);
  background: var(--color-slate-100);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-slate-600);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  position: relative;
  overflow: hidden;
}

.filter-chip::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--gradient-blog);
  transition: left var(--transition-base);
  z-index: -1;
}

.filter-chip:hover {
  color: var(--color-white);
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.filter-chip:hover::before {
  left: 0;
}

.filter-chip.active {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.filter-chip .remove-chip {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  border-radius: 50%;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: currentColor;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.filter-chip .remove-chip:hover {
  background: rgba(255, 255, 255, 0.3);
}

/* Enhanced Article Preview Cards */
.article-preview-card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-slow);
  overflow: hidden;
  border: 1px solid var(--color-slate-100);
  position: relative;
}

.article-preview-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary);
}

.article-preview-card .preview-image {
  height: 200px;
  background: linear-gradient(135deg, var(--color-slate-100) 0%, var(--color-slate-200) 100%);
  position: relative;
  overflow: hidden;
}

.article-preview-card .preview-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.article-preview-card:hover .preview-image img {
  transform: scale(1.1);
}

.preview-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
  color: white;
  padding: var(--space-6) var(--space-4) var(--space-4);
  transform: translateY(100%);
  transition: transform var(--transition-base);
}

.article-preview-card:hover .preview-overlay {
  transform: translateY(0);
}

/* Reading Progress Indicator */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background: var(--gradient-blog);
  z-index: 1000;
  transition: width var(--transition-fast);
  border-radius: 0 2px 2px 0;
}

/* Floating Action Button for "Back to Top" */
.fab-back-to-top {
  position: fixed;
  bottom: var(--space-8);
  right: var(--space-8);
  width: 56px;
  height: 56px;
  background: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: 50%;
  font-size: var(--text-lg);
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
  z-index: 100;
  opacity: 0;
  transform: translateY(20px);
}

.fab-back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

.fab-back-to-top:hover {
  background: var(--color-primary-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

/* Social Share Floating Panel */
.social-share-panel {
  position: fixed;
  left: var(--space-8);
  top: 50%;
  transform: translateY(-50%);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-4);
  z-index: 100;
  opacity: 0;
  transform: translateY(-50%) translateX(-20px);
  transition: all var(--transition-base);
  border: 1px solid var(--color-slate-200);
}

.social-share-panel.visible {
  opacity: 1;
  transform: translateY(-50%) translateX(0);
}

.social-share-button {
  display: block;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  text-decoration: none;
  font-size: var(--text-lg);
  transition: all var(--transition-fast);
  border: none;
  cursor: pointer;
}

.social-share-button:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

.social-share-button.twitter { background: #1da1f2; }
.social-share-button.linkedin { background: #0077b5; }
.social-share-button.facebook { background: #1877f2; }
.social-share-button.email { background: var(--color-slate-600); }

/* Enhanced Breadcrumb Navigation */
.enhanced-breadcrumb {
  background: linear-gradient(135deg, var(--color-white) 0%, var(--color-slate-50) 100%);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--color-slate-200);
}

.enhanced-breadcrumb .breadcrumb {
  background: transparent;
  padding: 0;
  margin: 0;
}

.enhanced-breadcrumb .breadcrumb-item {
  font-weight: 500;
  color: var(--color-slate-600);
}

.enhanced-breadcrumb .breadcrumb-item a {
  color: var(--color-slate-600);
  text-decoration: none;
  transition: color var(--transition-fast);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.enhanced-breadcrumb .breadcrumb-item a:hover {
  color: var(--color-primary);
  background: rgba(30, 58, 138, 0.05);
}

.enhanced-breadcrumb .breadcrumb-item.active {
  color: var(--color-primary);
  font-weight: 600;
}

/* Interactive Timeline Component */
.content-timeline {
  position: relative;
  padding-left: var(--space-8);
}

.content-timeline::before {
  content: '';
  position: absolute;
  left: var(--space-4);
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gradient-blog);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--space-8);
  padding: var(--space-6);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-slate-200);
  transition: all var(--transition-base);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-8) - 6px);
  top: var(--space-6);
  width: 12px;
  height: 12px;
  background: var(--color-primary);
  border-radius: 50%;
  box-shadow: 0 0 0 4px var(--color-white), var(--shadow-sm);
}

.timeline-item:hover {
  transform: translateX(var(--space-2));
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

/* Content Rating Component */
.content-rating {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4);
  background: var(--color-slate-50);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-slate-200);
  margin: var(--space-6) 0;
}

.rating-stars {
  display: flex;
  gap: var(--space-1);
}

.rating-star {
  font-size: var(--text-lg);
  color: var(--color-slate-300);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.rating-star.active {
  color: #fbbf24;
}

.rating-star:hover,
.rating-star:hover ~ .rating-star {
  color: #fbbf24;
}

/* Enhanced Table of Contents */
.toc-container {
  position: sticky;
  top: var(--space-8);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-slate-200);
  overflow: hidden;
}

.toc-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
  padding: var(--space-4) var(--space-6);
  font-weight: 700;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.toc-list {
  padding: var(--space-4) 0;
  list-style: none;
  margin: 0;
}

.toc-item {
  border-left: 3px solid transparent;
  transition: all var(--transition-fast);
}

.toc-item a {
  display: block;
  padding: var(--space-2) var(--space-6);
  color: var(--color-slate-600);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.toc-item:hover,
.toc-item.active {
  border-left-color: var(--color-primary);
  background: rgba(30, 58, 138, 0.05);
}

.toc-item:hover a,
.toc-item.active a {
  color: var(--color-primary);
  padding-left: calc(var(--space-6) + var(--space-2));
}

/* Responsive Enhancements */
@media (max-width: 768px) {
  .fab-back-to-top {
    bottom: var(--space-4);
    right: var(--space-4);
    width: 48px;
    height: 48px;
  }
  
  .social-share-panel {
    left: var(--space-4);
  }
  
  .filter-chips {
    gap: var(--space-1);
  }
  
  .filter-chip {
    font-size: var(--text-xs);
    padding: var(--space-1) var(--space-2);
  }
  
  .toc-container {
    position: relative;
    margin-bottom: var(--space-6);
  }
}

@media (max-width: 576px) {
  .advanced-search-container {
    padding: var(--space-4);
  }
  
  .search-input-group input {
    padding: var(--space-3) var(--space-4) var(--space-3) var(--space-10);
  }
  
  .search-input-icon {
    left: var(--space-3);
  }
  
  .timeline-item {
    padding: var(--space-4);
    margin-left: -var(--space-4);
  }
}