/* =============================================================================
   AI TECH BLOG - PROFESSIONAL DESIGN SYSTEM
   ============================================================================= */

/* Enhanced Font Loading for Better Visibility */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* Blog Color Palette */
:root {
  /* Enhanced Typography System */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
  
  /* AI Blog Colors - Professional Teal Theme */
  --ai-dark: #0a192f;
  --ai-darker: #112240;
  --ai-accent: #2dd4bf;
  --ai-accent-hover: #14b8a6;
  --ai-accent-light: #5eead4;
  --ai-accent-dark: #0f766e;
  --ai-white: #ffffff;
  --ai-gray-light: #8892b0;
  --ai-gray: #495670;
  --ai-success: #10b981;
  --ai-warning: #f59e0b;
  --ai-error: #ef4444;
  
  /* Button Theme Colors */
  --btn-primary: #14b8a6;
  --btn-primary-hover: #0f766e;
  --btn-secondary: rgba(45, 212, 191, 0.1);
  --btn-secondary-hover: rgba(45, 212, 191, 0.2);
  --btn-border: rgba(45, 212, 191, 0.3);
  --btn-text: #ffffff;
  
  /* Enhanced Text Colors for Better Contrast */
  --text-primary: #ffffff;
  --text-secondary: #e2e8f0;
  --text-muted: #8892b0;
  --text-dark: #1a202c;
  --text-body: #2d3748;
  
  /* Gradients */
  --ai-gradient-primary: linear-gradient(135deg, var(--ai-dark) 0%, var(--ai-darker) 50%, #1a365d 100%);
  --ai-gradient-accent: linear-gradient(135deg, var(--ai-accent) 0%, var(--ai-accent-light) 100%);
  --ai-gradient-card: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
  --ai-gradient-button: linear-gradient(135deg, var(--btn-primary) 0%, var(--ai-accent) 100%);
  
  /* Shadows */
  --ai-shadow-glow: 0 0 30px rgba(100, 255, 218, 0.2);
  --ai-shadow-card: 0 10px 30px rgba(0, 0, 0, 0.3);
  --ai-shadow-elevated: 0 20px 40px rgba(0, 0, 0, 0.4);
  --ai-shadow-header: 0 4px 20px rgba(0, 0, 0, 0.15);
}

/* Global Typography Reset for Better Font Visibility */
* {
  font-family: var(--font-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-primary);
  line-height: 1.6;
  color: var(--text-primary);
  font-weight: 400;
  letter-spacing: -0.01em;
}

/* Dark Mode Variables */
[data-theme="dark"] {
  --ai-white: var(--ai-dark);
  --ai-dark: #ffffff;
  --ai-darker: #f8fafc;
  --ai-gray-light: #475569;
  --ai-gray: #64748b;
  --text-primary: #1a202c;
  --text-secondary: #2d3748;
  --text-muted: #4a5568;
}

/* =============================================================================
   BLOG NAVIGATION ENHANCEMENTS
   ============================================================================= */

/* Enhanced Navigation for Blog Page */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(10, 25, 47, 0.95);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(100, 255, 218, 0.15);
  z-index: var(--z-fixed);
  padding: 1rem 0;
  transition: all var(--transition-normal);
  box-shadow: var(--ai-shadow-header);
}

.navbar::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, rgba(100, 255, 218, 0.05) 0%, rgba(100, 255, 218, 0.02) 50%, rgba(100, 255, 218, 0.05) 100%);
  pointer-events: none;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  z-index: 2;
}

.nav-brand {
  display: flex;
  align-items: center;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.brand-logo:hover {
  transform: translateY(-1px);
  filter: drop-shadow(0 4px 12px rgba(100, 255, 218, 0.3));
}

.logo-icon {
  font-size: 2rem;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,0.3));
  animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.brand-text {
  font-family: var(--font-primary);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text-primary);
  text-shadow: 0 2px 8px rgba(0,0,0,0.4);
  letter-spacing: -0.02em;
  line-height: 1;
}

.blog-badge {
  background: var(--ai-accent);
  color: var(--ai-white);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-full);
  font-family: var(--font-primary);
  font-size: 0.7rem;
  font-weight: 500;
  margin-left: 0.5rem;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}

.nav-menu {
  display: flex;
  gap: 0.25rem;
  align-items: center;
  padding: 0.25rem 0;
}

.nav-link {
  position: relative;
  text-decoration: none;
  color: var(--text-secondary);
  font-family: var(--font-primary);
  font-weight: 400;
  padding: 0.45rem 0.8rem;
  border-radius: var(--radius-sm);
  transition: opacity var(--transition-fast);
  font-size: 0.875rem;
  border: none !important;
  background: transparent !important;
  box-shadow: none !important;
  letter-spacing: normal;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
}

.nav-link:hover {
  color: var(--ai-accent);
  opacity: 0.8;
}

.nav-link.active {
  color: var(--ai-accent);
  font-weight: 500;
  background: transparent !important;
  box-shadow: none !important;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 3px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0.5rem;
  min-width: 32px;
  min-height: 32px;
  justify-content: center;
  align-items: center;
  transition: opacity var(--transition-fast);
}

.mobile-menu-btn:hover {
  opacity: 0.8;
}

.mobile-menu-btn span {
  width: 20px;
  height: 2px;
  background: var(--ai-accent);
  transition: all var(--transition-fast);
  border-radius: 1px;
}

/* Enhanced Mobile Navigation */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(17, 34, 64, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--btn-border);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    flex-direction: column;
    padding: 2rem;
    gap: 0.5rem;
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .mobile-menu-btn {
    display: flex;
  }
  
  .nav-container {
    padding: 0 1rem;
  }
  
  .brand-text {
    font-size: 1.4rem;
  }
  
  .nav-link {
    width: 100%;
    text-align: center;
    padding: 0.875rem 1.25rem;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
  }
  
  .blog-badge {
    display: none;
  }
}

.search-toggle,
.theme-toggle {
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.5rem;
  color: var(--ai-accent);
  cursor: pointer;
  transition: opacity var(--transition-fast);
  font-size: 1.2rem;
  min-width: 32px;
  min-height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-toggle:hover,
.theme-toggle:hover {
  opacity: 0.8;
}

.search-toggle:active,
.theme-toggle:active {
  opacity: 0.6;
}

/* Search Container */
.search-container {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--ai-darker);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
  z-index: var(--z-dropdown);
}

.search-container.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.search-wrapper {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.search-input {
  flex: 1;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  padding: 1rem 1.5rem;
  color: var(--neutral-50);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.search-input:focus {
  outline: none;
  border-color: var(--ai-accent);
  box-shadow: 0 0 0 2px rgba(100, 255, 218, 0.2);
}

.search-input::placeholder {
  color: var(--ai-gray-light);
}

.search-btn {
  background: var(--ai-accent);
  color: var(--ai-white);
  border: none;
  border-radius: var(--radius-md);
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: opacity var(--transition-fast);
}

.search-btn:hover {
  opacity: 0.9;
}

.search-close {
  background: none;
  border: none;
  color: var(--ai-accent);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  transition: opacity var(--transition-fast);
  min-width: 32px;
  min-height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-close:hover {
  opacity: 0.8;
}

/* Body padding for fixed header - Blog pages only */
.blog-page,
.category-page,
.article-page {
  padding-top: 95px;
}

/* Enhanced container styling */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* =============================================================================
   BREADCRUMB STYLING
   ============================================================================= */

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
  font-size: 0.9rem;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: all var(--transition-fast);
  font-weight: 500;
}

.breadcrumb a:hover {
  color: var(--ai-accent);
  text-decoration: underline;
}

.breadcrumb-separator {
  color: rgba(255, 255, 255, 0.6);
  font-weight: 600;
}

.breadcrumb-current {
  color: var(--ai-accent);
  font-weight: 600;
}

/* =============================================================================
   BLOG HERO SECTION
   ============================================================================= */

.blog-hero {
  min-height: 85vh;
  background: var(--ai-gradient-primary);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 0;
}

.hero-bg-animation {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
}

.ai-particles {
  position: absolute;
  width: 100%;
  height: 100%;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="1" fill="rgba(100,255,218,0.3)"><animate attributeName="opacity" values="0;1;0" dur="3s" repeatCount="indefinite"/></circle><circle cx="80" cy="30" r="1" fill="rgba(100,255,218,0.4)"><animate attributeName="opacity" values="0;1;0" dur="4s" repeatCount="indefinite"/></circle><circle cx="60" cy="70" r="1" fill="rgba(100,255,218,0.2)"><animate attributeName="opacity" values="0;1;0" dur="5s" repeatCount="indefinite"/></circle></svg>') repeat;
  opacity: 0.6;
  animation: float 20s ease-in-out infinite;
}

.neural-network {
  position: absolute;
  width: 100%;
  height: 100%;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200"><defs><pattern id="network" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 20 0 L 20 40 M 0 20 L 40 20" stroke="rgba(100,255,218,0.1)" stroke-width="0.5"/><circle cx="20" cy="20" r="2" fill="rgba(100,255,218,0.2)"/></pattern></defs><rect width="200" height="200" fill="url(%23network)"/></svg>') repeat;
  opacity: 0.3;
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  33% { transform: translateY(-10px) rotate(1deg); }
  66% { transform: translateY(5px) rotate(-1deg); }
}

.blog-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  padding: 0.75rem 1.5rem;
  margin-bottom: 2rem;
  backdrop-filter: blur(10px);
  animation: glow 3s ease-in-out infinite alternate;
}

@keyframes glow {
  from { box-shadow: 0 0 10px rgba(100, 255, 218, 0.2); }
  to { box-shadow: 0 0 20px rgba(100, 255, 218, 0.4); }
}

.badge-icon {
  font-size: 1.2rem;
}

.blog-hero-title {
  font-family: var(--font-primary);
  font-size: 4.5rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 2rem;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.blog-hero-title .title-line {
  display: block;
}

.blog-hero-title .highlight {
  background: var(--ai-gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 30px rgba(100, 255, 218, 0.3);
}

.blog-hero-subtitle {
  font-family: var(--font-primary);
  font-size: 1.35rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 3rem;
  max-width: 750px;
  margin-left: auto;
  margin-right: auto;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 4rem;
  margin-top: 3rem;
}

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

.hero-stats .stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--ai-accent);
  text-shadow: 0 0 20px rgba(100, 255, 218, 0.3);
}

.hero-stats .stat-label {
  color: var(--ai-gray-light);
  font-size: 0.9rem;
  font-weight: 500;
  margin-top: 0.5rem;
}

/* =============================================================================
   CATEGORY FILTER
   ============================================================================= */

.category-filter {
  background: var(--ai-darker);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: 2rem 0;
}

.filter-wrapper {
  text-align: center;
}

.filter-title {
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 2rem;
  letter-spacing: -0.02em;
}

.category-tabs {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.category-tab {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 0.875rem 1.75rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-primary);
  font-weight: 500;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.category-tab:hover {
  background: var(--btn-secondary-hover);
  border-color: var(--ai-accent);
  color: var(--ai-accent-light);
}

.category-tab.active {
  background: var(--ai-accent);
  border-color: var(--ai-accent);
  color: var(--ai-white);
  font-weight: 600;
}

.tab-icon {
  font-size: 1.1rem;
}

/* =============================================================================
   FEATURED ARTICLES
   ============================================================================= */

.featured-articles {
  background: var(--neutral-50);
  padding: 6rem 0;
}

.section-title {
  color: var(--neutral-800);
  font-size: 2.5rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 1rem;
}

.section-subtitle {
  color: var(--neutral-600);
  font-size: 1.2rem;
  text-align: center;
  margin-bottom: 3rem;
  font-weight: 400;
}

.featured-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
  margin-top: 3rem;
}

.featured-main {
  background: white;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal);
}

.featured-main:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-2xl);
}

.featured-secondary {
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  margin-bottom: 2rem;
}

.featured-secondary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.featured-secondary:last-child {
  margin-bottom: 0;
}

.article-image {
  position: relative;
  overflow: hidden;
}

.featured-main .article-image {
  height: 300px;
}

.featured-secondary .article-image {
  height: 180px;
}

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

.article-image:hover img {
  transform: scale(1.05);
}

.article-category {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: var(--ai-gradient-accent);
  color: var(--ai-dark);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
}

.article-content {
  padding: 2rem;
}

.featured-secondary .article-content {
  padding: 1.5rem;
}

.article-title {
  color: var(--neutral-800);
  font-size: 1.6rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 1rem;
}

.featured-secondary .article-title {
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
  font-weight: 700;
}

.article-excerpt {
  color: var(--neutral-700);
  line-height: 1.7;
  margin-bottom: 1.5rem;
  font-size: 1rem;
  font-weight: 400;
}

.featured-secondary .article-excerpt {
  font-size: 0.95rem;
  margin-bottom: 1rem;
  color: var(--neutral-600);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  font-size: 0.85rem;
  color: var(--neutral-500);
}

.meta-date,
.meta-read,
.meta-author {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.meta-date::before { content: '📅'; }
.meta-read::before { content: '⏱️'; }
.meta-author::before { content: '👤'; }

.article-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary-600);
  text-decoration: none;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.article-link:hover {
  color: var(--primary-700);
  gap: 0.75rem;
}

.link-arrow {
  transition: transform var(--transition-fast);
}

.article-link:hover .link-arrow {
  transform: translateX(4px);
}

/* =============================================================================
   ARTICLES GRID
   ============================================================================= */

.articles-grid {
  background: var(--neutral-100);
  padding: 4rem 0;
}

.articles-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 3rem;
}

.articles-title {
  color: var(--neutral-800);
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.articles-grid {
  background: var(--neutral-100);
  padding: 6rem 0;
}

.articles-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4rem;
}

.sort-select {
  background: white;
  border: 1px solid var(--neutral-300);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  color: var(--neutral-700);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sort-select:focus {
  outline: none;
  border-color: var(--primary-400);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.articles-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.article-card {
  background: white;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
  transition: all var(--transition-normal);
  opacity: 0;
  transform: translateY(20px);
  animation: slideInUp 0.6s ease-out forwards;
  border: 1px solid var(--neutral-200);
}

.article-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
  border-color: var(--primary-300);
}

.article-card .article-title {
  color: var(--neutral-800);
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 1rem;
}

.article-card .article-excerpt {
  color: var(--neutral-700);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
  font-weight: 400;
}

.article-card .article-content {
  padding: 2rem;
}

.article-card .article-meta {
  color: var(--neutral-600);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.article-card .meta-date,
.article-card .meta-author {
  font-weight: 500;
}

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

.article-card .article-image {
  height: 220px;
  position: relative;
  overflow: hidden;
}

.article-card .article-image img {
  transition: transform var(--transition-slow);
}

.article-card:hover .article-image img {
  transform: scale(1.08);
}

.article-card .article-category {
  position: absolute;
  top: 1rem;
  left: 1rem;
  background: var(--primary-600);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  z-index: 2;
}

.article-card .read-time {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(0, 0, 0, 0.8);
  color: white;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
  z-index: 2;
}

.article-card .article-excerpt {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Loading States */
.loading-placeholder {
  grid-column: 1 / -1;
  text-align: center;
  padding: 4rem;
  color: var(--neutral-500);
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--neutral-200);
  border-top: 3px solid var(--primary-500);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto 1rem;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.load-more {
  text-align: center;
}

/* Enhanced Button System */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: none;
  border-radius: var(--radius-md);
  padding: 0.875rem 1.75rem;
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  justify-content: center;
}

.btn-primary {
  background: var(--ai-accent);
  color: var(--ai-white);
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--ai-accent);
  color: var(--ai-accent);
}

.btn-outline:hover {
  background: var(--ai-accent);
  color: var(--ai-white);
}

/* =============================================================================
   NEWSLETTER SECTION
   ============================================================================= */

.newsletter-section {
  background: var(--ai-gradient-primary);
  padding: 4rem 0;
  text-align: center;
}

.newsletter-content {
  max-width: 600px;
  margin: 0 auto;
}

.newsletter-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.newsletter-title {
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 2.75rem;
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
}

.newsletter-description {
  color: var(--text-secondary);
  font-family: var(--font-primary);
  font-size: 1.2rem;
  line-height: 1.6;
  margin-bottom: 2rem;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.newsletter-form .form-group {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
}

.newsletter-input {
  flex: 1;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  padding: 1.125rem 1.75rem;
  color: var(--text-primary);
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: 400;
  transition: all var(--transition-fast);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.newsletter-input:focus {
  outline: none;
  border-color: var(--ai-accent);
  box-shadow: 0 0 0 2px rgba(100, 255, 218, 0.2);
}

.newsletter-input::placeholder {
  color: var(--text-muted);
  font-weight: 400;
}

.newsletter-privacy {
  color: var(--ai-gray-light);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

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

@media (max-width: 1200px) {
  .container {
    padding: 0 1.5rem;
  }
  
  .blog-hero-title {
    font-size: 4rem;
  }
}

@media (max-width: 1024px) {
  .featured-grid {
    grid-template-columns: 1fr;
  }
  
  .featured-main {
    margin-bottom: 2rem;
  }
  
  .hero-stats {
    gap: 2rem;
  }
  
  .category-tabs {
    gap: 0.5rem;
    justify-content: center;
  }
  
  .category-tab {
    padding: 0.75rem 1.25rem;
    font-size: 0.9rem;
    flex: 1;
    max-width: 200px;
  }
  
  .nav-actions {
    gap: 0.75rem;
  }
  
  .blog-hero {
    min-height: 75vh;
  }
}

@media (max-width: 768px) {
  .blog-hero {
    min-height: 70vh;
    padding: 2rem 0;
  }
  
  .blog-hero-title {
    font-size: 3.25rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
  }
  
  .blog-hero-subtitle {
    font-size: 1.15rem;
    line-height: 1.5;
    margin-bottom: 2rem;
  }
  
  .hero-stats {
    flex-direction: row;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
  }
  
  .hero-stats .stat-item {
    min-width: 100px;
  }
  
  .category-tabs {
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
  }
  
  .category-tab {
    width: 100%;
    max-width: 280px;
    justify-content: center;
    padding: 1rem 1.5rem;
  }
  
  .articles-header {
    flex-direction: column;
    gap: 1.5rem;
    align-items: stretch;
  }
  
  .articles-container {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .newsletter-form .form-group {
    flex-direction: column;
    gap: 1rem;
  }
  
  .search-wrapper {
    flex-direction: column;
    gap: 1rem;
    padding: 1.5rem 1rem;
  }
  
  .search-btn {
    width: 100%;
    padding: 1rem 2rem;
  }
  
  .navbar {
    padding: 0.75rem 0;
  }
  
  .filter-title {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .blog-hero {
    min-height: 65vh;
  }
  
  .blog-hero-title {
    font-size: 2.75rem;
    line-height: 1.1;
    margin-bottom: 1rem;
  }
  
  .blog-hero-subtitle {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
  }
  
  .hero-stats {
    flex-direction: row;
    gap: 1rem;
    margin-top: 2rem;
  }
  
  .hero-stats .stat-item {
    min-width: 80px;
  }
  
  .hero-stats .stat-number {
    font-size: 2rem;
  }
  
  .hero-stats .stat-label {
    font-size: 0.8rem;
  }
  
  .nav-container {
    padding: 0 1rem;
  }
  
  .brand-text {
    font-size: 1.3rem;
  }
  
  .blog-badge {
    display: none;
  }
  
  .featured-articles,
  .articles-grid {
    padding: 3rem 0;
  }
  
  .article-content {
    padding: 1.5rem;
  }
  
  .newsletter-title {
    font-size: 2.25rem;
  }
  
  .newsletter-description {
    font-size: 1.1rem;
  }
  
  .container {
    padding: 0 1rem;
  }
  
  .category-filter {
    padding: 1.5rem 0;
  }
  
  .filter-title {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
  }
  
  .search-toggle,
  .theme-toggle {
    min-width: 40px;
    min-height: 40px;
    padding: 0.5rem;
    font-size: 0.95rem;
  }
  
  .mobile-menu-btn {
    min-width: 40px;
    min-height: 40px;
  }
  
  .nav-actions {
    gap: 0.4rem;
  }
  
  .category-tab {
    padding: 0.75rem 1.25rem;
    font-size: 0.85rem;
  }
  
  .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
  }
  
  .search-btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
  }
  
  .search-close {
    min-width: 36px;
    min-height: 36px;
    font-size: 1.1rem;
  }
}

/* =============================================================================
   DARK MODE SUPPORT
   ============================================================================= */

[data-theme="dark"] .featured-articles,
[data-theme="dark"] .articles-grid {
  background: var(--neutral-800);
}

[data-theme="dark"] .article-card,
[data-theme="dark"] .featured-main,
[data-theme="dark"] .featured-secondary {
  background: var(--neutral-700);
  border: 1px solid var(--neutral-600);
}

[data-theme="dark"] .article-title {
  color: var(--neutral-100);
}

[data-theme="dark"] .article-excerpt {
  color: var(--neutral-300);
}

[data-theme="dark"] .sort-select {
  background: var(--neutral-700);
  border-color: var(--neutral-600);
  color: var(--neutral-200);
}

/* =============================================================================
   CATEGORY PAGE STYLES
   ============================================================================= */

.category-hero {
  min-height: 70vh;
  background: var(--ai-gradient-primary);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 0;
}

.category-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="rgba(100,255,218,0.1)"><animate attributeName="opacity" values="0;1;0" dur="3s" repeatCount="indefinite"/></circle><circle cx="80" cy="30" r="1.5" fill="rgba(100,255,218,0.15)"><animate attributeName="opacity" values="0;1;0" dur="4s" repeatCount="indefinite"/></circle><circle cx="60" cy="70" r="1" fill="rgba(100,255,218,0.1)"><animate attributeName="opacity" values="0;1;0" dur="5s" repeatCount="indefinite"/></circle></svg>') repeat;
  opacity: 0.6;
  z-index: 1;
}

.category-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.category-title {
  font-family: var(--font-primary);
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 2rem;
  color: var(--text-primary);
  text-align: center;
  letter-spacing: -0.03em;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.category-title .title-line {
  display: block;
}

.category-title .highlight {
  background: var(--ai-gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 30px rgba(100, 255, 218, 0.3);
}

.category-icon {
  font-size: 3rem;
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.3));
}

.category-subtitle {
  font-family: var(--font-primary);
  font-size: 1.3rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 3rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  font-weight: 400;
  letter-spacing: -0.01em;
  text-align: center;
}

.category-meta {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.category-meta .meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  backdrop-filter: blur(10px);
}

.category-meta .meta-icon {
  font-size: 1rem;
}

/* Removed - replaced with .meta-item styles above */

/* Category Articles Section */
.category-articles {
  background: var(--neutral-50);
  padding: 6rem 0;
}

.category-articles .articles-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 2.5rem;
  margin-bottom: 4rem;
}

.category-articles .articles-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4rem;
}

.category-articles .articles-title {
  color: var(--neutral-800);
  font-size: 2.2rem;
  font-weight: 800;
}

.view-controls {
  display: flex;
  gap: 0.5rem;
}

.view-btn {
  background: white;
  border: 1px solid var(--neutral-300);
  border-radius: var(--radius-md);
  padding: 0.5rem 1rem;
  color: var(--neutral-700);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 0.9rem;
}

.view-btn.active,
.view-btn:hover {
  background: var(--primary-500);
  border-color: var(--primary-500);
  color: white;
}

/* Related Categories */
.related-categories {
  background: var(--neutral-100);
  padding: 4rem 0;
}

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.category-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: 2rem;
  text-decoration: none;
  color: var(--neutral-800);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  text-align: center;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  color: var(--neutral-800);
}

.category-card .category-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  display: block;
}

.category-card h3 {
  color: var(--primary-700);
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
}

.category-card p {
  color: var(--neutral-600);
  line-height: 1.5;
  margin-bottom: 1rem;
}

.category-count {
  font-size: 0.85rem;
  color: var(--neutral-500);
  font-weight: 500;
}

/* =============================================================================
   ARTICLE PAGE STYLES
   ============================================================================= */

.article-hero {
  min-height: 60vh;
  background: var(--ai-gradient-primary);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.article-hero-content {
  position: relative;
  z-index: 2;
  max-width: 1000px;
  margin: 0 auto;
  text-align: center;
}

.article-category-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--ai-gradient-accent);
  color: var(--ai-dark);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}


/* Unify article hero typography with blog hero */
.article-title { display:none; }

.article-subtitle {
  font-size: 1.2rem;
  color: var(--ai-gray-light);
  line-height: 1.6;
  margin-bottom: 2rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.article-meta {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--ai-gray-light);
  font-size: 0.9rem;
}

.meta-icon {
  font-size: 1rem;
}

.social-share {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.share-label {
  color: var(--ai-gray-light);
  font-weight: 500;
}

.share-btn {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  padding: 0.5rem 1rem;
  color: var(--neutral-50);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 0.85rem;
}

.share-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* Article Content Layout */
.article-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 4rem;
  max-width: 1400px;
  margin: 0 auto;
  padding: 4rem 0;
}

.article-toc {
  position: sticky;
  top: 8rem;
  height: fit-content;
  background: white;
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--neutral-200);
}

.article-toc h3 {
  color: var(--neutral-800);
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--primary-200);
  padding-bottom: 0.5rem;
}

.toc-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toc-link {
  color: var(--neutral-600);
  text-decoration: none;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-weight: 500;
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
}

.toc-link:hover,
.toc-link.active {
  color: var(--primary-700);
  background: var(--primary-50);
  border-left-color: var(--primary-500);
  transform: translateX(4px);
}

.article-main {
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  border: 1px solid var(--neutral-200);
  overflow: hidden;
}

.article-body {
  padding: 4rem;
}

.content-section {
  margin-bottom: 4rem;
}

.content-section:last-child {
  margin-bottom: 0;
}

.content-section h2 {
  color: var(--neutral-800);
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 2rem;
  border-bottom: 3px solid var(--primary-200);
  padding-bottom: 1rem;
  line-height: 1.3;
}

.content-section h3 {
  color: var(--neutral-800);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  margin-top: 2.5rem;
  line-height: 1.4;
}

.content-section p {
  color: var(--neutral-700);
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
  font-weight: 400;
}

.lead {
  font-size: 1.25rem;
  line-height: 1.8;
  color: var(--neutral-700);
  margin-bottom: 2.5rem;
  font-weight: 500;
  border-left: 4px solid var(--primary-400);
  padding-left: 2rem;
  background: var(--primary-50);
  padding: 2rem;
  border-radius: var(--radius-lg);
}

/* Article Components */
.tool-features,
.use-cases,
.feature-spotlight {
  background: var(--neutral-50);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin: 2rem 0;
  border-left: 4px solid var(--primary-400);
}

.tool-features h4,
.use-cases h4,
.feature-spotlight h4 {
  color: var(--primary-700);
  margin-top: 0;
  margin-bottom: 1rem;
}

.pricing-info {
  background: var(--success-50);
  border: 1px solid var(--success-200);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.pricing-info h4 {
  color: var(--success-800);
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.pricing-info p {
  color: var(--success-700);
  margin: 0;
  font-weight: 500;
}

.pros-cons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin: 2rem 0;
}

.pros,
.cons {
  background: white;
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  border: 1px solid var(--neutral-200);
}

.pros {
  border-left: 4px solid var(--success-500);
}

.cons {
  border-left: 4px solid var(--error-500);
}

.pros h4 {
  color: var(--success-700);
}

.cons h4 {
  color: var(--error-700);
}

/* Article Navigation */
.article-navigation {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--neutral-200);
}

.nav-prev,
.nav-next {
  text-decoration: none;
  color: var(--neutral-800);
}

.nav-link {
  display: block;
  background: var(--neutral-50);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: all var(--transition-fast);
  text-decoration: none;
  color: inherit;
}

.nav-link:hover {
  background: var(--primary-50);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.nav-direction {
  font-size: 0.85rem;
  color: var(--neutral-500);
  font-weight: 500;
}

.nav-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--neutral-800);
  margin-top: 0.5rem;
  display: block;
}

/* Related Articles */
.related-articles {
  background: var(--neutral-100);
  padding: 4rem 0;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.related-card {
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  text-decoration: none;
  color: var(--neutral-800);
}

.related-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: var(--neutral-800);
}

.related-image {
  height: 150px;
  overflow: hidden;
}

.related-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.related-content {
  padding: 1.5rem;
}

.related-category {
  background: var(--primary-100);
  color: var(--primary-800);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  display: inline-block;
  margin-bottom: 1rem;
}

.related-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.related-meta {
  font-size: 0.85rem;
  color: var(--neutral-500);
}

/* =============================================================================
   NOTIFICATIONS
   ============================================================================= */

.notification {
  position: fixed;
  top: 2rem;
  right: 2rem;
  background: white;
  border-radius: var(--radius-lg);
  padding: 1rem 1.5rem;
  box-shadow: var(--shadow-xl);
  border-left: 4px solid var(--success-500);
  z-index: var(--z-tooltip);
  transform: translateX(100%);
  opacity: 0;
  transition: all var(--transition-normal);
  max-width: 400px;
}

.notification.show {
  transform: translateX(0);
  opacity: 1;
}

.notification-error {
  border-left-color: var(--error-500);
}

.notification-message {
  display: block;
  margin-right: 2rem;
  color: var(--neutral-800);
  font-weight: 500;
}

.notification-close {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--neutral-500);
  padding: 0.25rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.notification-close:hover {
  background: var(--neutral-100);
  color: var(--neutral-700);
}

/* =============================================================================
   RESPONSIVE DESIGN FOR ARTICLES
   ============================================================================= */

@media (max-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
    padding: 2rem 0;
  }
  
  .article-toc {
    position: static;
    order: -1;
  }
  
  .pros-cons {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .article-navigation {
    grid-template-columns: 1fr;
  }
  
  .category-title {
    font-size: 2.75rem;
    line-height: 1.1;
  }
  
  .category-subtitle {
    font-size: 1.2rem;
  }
  
  .category-meta {
    flex-direction: column;
    gap: 1rem;
    align-items: center;
  }
}

@media (max-width: 768px) {
  .article-title {
    font-size: 2.5rem;
  }
  
  .article-meta {
    flex-direction: column;
    gap: 1rem;
  }
  
  .article-body {
    padding: 2rem 1.5rem;
  }
  
  .social-share {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .related-grid {
    grid-template-columns: 1fr;
  }
  
  .notification {
    left: 1rem;
    right: 1rem;
    max-width: none;
  }
  
  .category-hero {
    min-height: 60vh;
    padding: 2rem 0;
  }
  
  .category-title {
    font-size: 2.25rem;
  }
  
  .category-subtitle {
    font-size: 1.1rem;
    padding: 0 1rem;
  }
  
  .category-meta {
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1rem;
  }
  
  .category-meta .meta-item {
    font-size: 0.85rem;
    padding: 0.4rem 0.8rem;
  }
}

/* =============================================================================
   ANIMATION DELAYS FOR STAGGERED LOADING
   ============================================================================= */

.article-card:nth-child(1) { animation-delay: 0.1s; }
.article-card:nth-child(2) { animation-delay: 0.2s; }
.article-card:nth-child(3) { animation-delay: 0.3s; }
.article-card:nth-child(4) { animation-delay: 0.4s; }
.article-card:nth-child(5) { animation-delay: 0.5s; }
.article-card:nth-child(6) { animation-delay: 0.6s; }

/* Entrance Animation */
.animate-in {
  animation: slideInUp 0.6s ease-out forwards;
}

/* Article Tags */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1rem 0;
}

.tag {
  background: var(--primary-100);
  color: var(--primary-800);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
}

/* Read Time Badge */
.read-time {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 500;
}

/* Success color variables */
:root {
  --success-50: #f0fdf4;
  --success-200: #bbf7d0;
  --success-700: #15803d;
  --success-800: #166534;
}

/* =============================================================================
   ENHANCED TYPOGRAPHY SYSTEM
   ============================================================================= */

/* Ensure all headings use the proper font */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary) !important;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: inherit;
}

/* Ensure all body text uses proper font */
p, span, div, a, li, td, th {
  font-family: var(--font-primary) !important;
  font-weight: 400;
  letter-spacing: -0.01em;
}

/* Strong text styling */
strong, b {
  font-family: var(--font-primary) !important;
  font-weight: 600;
}

/* Code elements */
code, pre {
  font-family: var(--font-mono) !important;
}

/* Button text */
button, .btn {
  font-family: var(--font-primary) !important;
  font-weight: 500;
  letter-spacing: -0.01em;
}

/* Input text */
input, textarea, select {
  font-family: var(--font-primary) !important;
  font-weight: 400;
}

/* Article specific typography */
.article-page {
  font-family: var(--font-primary);
}

.article-page h1 {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.article-page h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-top: 3rem;
  margin-bottom: 1.5rem;
}

.article-page h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 1rem;
}

.article-page p {
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
  color: var(--text-body);
}

.article-page li {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 0.5rem;
}

/* Enhanced contrast for light backgrounds */
.featured-articles h2,
.featured-articles h3,
.featured-articles p,
.articles-grid h2,
.articles-grid h3,
.articles-grid p {
  color: var(--text-dark) !important;
}

.article-card .article-title {
  color: var(--text-dark) !important;
  font-family: var(--font-primary) !important;
  font-weight: 700 !important;
}

.article-card .article-excerpt {
  color: var(--text-body) !important;
  font-family: var(--font-primary) !important;
}

/* Enhanced Typography & Contrast */
.highlight-box {
  background: linear-gradient(135deg, rgba(45, 212, 191, 0.05) 0%, rgba(45, 212, 191, 0.1) 100%);
  border: 1px solid var(--btn-border);
  border-left: 4px solid var(--ai-accent);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin: 2rem 0;
}

.highlight-box h4 {
  color: var(--ai-accent-dark);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 1rem;
  margin-top: 0;
}

.highlight-box ul,
.highlight-box ol {
  color: var(--neutral-700);
  font-size: 1rem;
  line-height: 1.7;
  margin: 0;
  padding-left: 1.5rem;
}

.highlight-box li {
  margin-bottom: 0.8rem;
  font-weight: 500;
}

.warning-box {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  border: 1px solid #fbbf24;
  border-left: 4px solid #f59e0b;
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin: 2rem 0;
}

.warning-box h4 {
  color: #92400e;
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  margin-top: 0;
}

.warning-box p {
  color: #78350f;
  font-family: var(--font-primary) !important;
  font-size: 1rem;
  line-height: 1.7;
  margin: 0;
  font-weight: 500;
}

/* Article body enhancements */
.article-body {
  font-family: var(--font-primary);
}

.article-body h2,
.article-body h3,
.article-body h4 {
  font-family: var(--font-primary) !important;
  color: var(--text-dark);
}

.article-body p {
  font-family: var(--font-primary) !important;
  color: var(--text-body);
  font-size: 1.1rem;
  line-height: 1.7;
}

.article-body ul,
.article-body ol {
  font-family: var(--font-primary) !important;
}

.article-body li {
  font-family: var(--font-primary) !important;
  color: var(--text-body);
  line-height: 1.6;
}

/* Table of contents styling */
.toc-link {
  font-family: var(--font-primary) !important;
  font-weight: 500;
}

/* Breadcrumb styling */
.breadcrumb {
  font-family: var(--font-primary) !important;
}

.breadcrumb a,
.breadcrumb-current {
  font-family: var(--font-primary) !important;
  font-weight: 500;
}

/* =============================================================================
   MODERN MODAL SYSTEM - FAST LOADING & PROFESSIONAL DESIGN
   ============================================================================= */

/* Modal Overlay - Instant Loading */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 25, 47, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Modal Content - Professional Design */
.modal-content {
  background: var(--ai-gradient-card);
  border: 1px solid rgba(100, 255, 218, 0.2);
  border-radius: 16px;
  box-shadow: var(--ai-shadow-elevated);
  max-width: 90vw;
  max-height: 90vh;
  width: 100%;
  overflow: hidden;
  transform: scale(0.9) translateY(20px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.modal-overlay.active .modal-content {
  transform: scale(1) translateY(0);
}

/* Modal Header */
.modal-header {
  background: rgba(100, 255, 218, 0.05);
  border-bottom: 1px solid rgba(100, 255, 218, 0.1);
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.modal-header h3 {
  color: var(--ai-accent);
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.02em;
}

.close-btn {
  background: rgba(100, 255, 218, 0.1);
  border: 1px solid rgba(100, 255, 218, 0.2);
  color: var(--ai-accent);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.2rem;
  font-weight: 600;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.close-btn:hover {
  background: rgba(100, 255, 218, 0.2);
  border-color: var(--ai-accent);
  transform: scale(1.05);
  box-shadow: 0 0 20px rgba(100, 255, 218, 0.3);
}

.close-btn:active {
  transform: scale(0.95);
}

/* Modal Body */
.modal-body {
  padding: 2rem;
  overflow-y: auto;
  max-height: 60vh;
}

.modal-body::-webkit-scrollbar {
  width: 6px;
}

.modal-body::-webkit-scrollbar-track {
  background: rgba(100, 255, 218, 0.05);
  border-radius: 3px;
}

.modal-body::-webkit-scrollbar-thumb {
  background: rgba(100, 255, 218, 0.3);
  border-radius: 3px;
}

.modal-body::-webkit-scrollbar-thumb:hover {
  background: rgba(100, 255, 218, 0.5);
}

/* Modal Footer */
.modal-footer {
  background: rgba(100, 255, 218, 0.02);
  border-top: 1px solid rgba(100, 255, 218, 0.1);
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 1rem;
}

/* AI Tools Modal Specific Styles */
.ai-tools-modal .modal-content {
  max-width: 1200px;
  width: 95vw;
}

.ai-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.ai-tool-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(100, 255, 218, 0.1);
  border-radius: 12px;
  padding: 1.5rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.ai-tool-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--ai-gradient-accent);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.ai-tool-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(100, 255, 218, 0.3);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

.ai-tool-card:hover::before {
  opacity: 1;
}

.tool-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.tool-header h4 {
  color: var(--ai-accent);
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0;
}

.pricing-badge {
  background: rgba(100, 255, 218, 0.1);
  color: var(--ai-accent);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid rgba(100, 255, 218, 0.2);
}

.tool-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.tool-features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.feature-tag {
  background: rgba(100, 255, 218, 0.1);
  color: var(--ai-accent);
  padding: 0.25rem 0.75rem;
  border-radius: 15px;
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid rgba(100, 255, 218, 0.2);
}

.tool-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--ai-accent);
  text-decoration: none;
  font-weight: 500;
  padding: 0.75rem 1.5rem;
  background: rgba(100, 255, 218, 0.1);
  border: 1px solid rgba(100, 255, 218, 0.2);
  border-radius: 8px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.tool-link::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(100, 255, 218, 0.2), transparent);
  transition: left 0.5s ease;
}

.tool-link:hover {
  background: rgba(100, 255, 218, 0.2);
  border-color: var(--ai-accent);
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(100, 255, 218, 0.2);
}

.tool-link:hover::before {
  left: 100%;
}

/* Tool Instructions */
.tool-instructions {
  background: rgba(100, 255, 218, 0.05);
  border: 1px solid rgba(100, 255, 218, 0.1);
  border-radius: 12px;
  padding: 1.5rem;
  margin: 2rem 0;
}

.tool-instructions h4 {
  color: var(--ai-accent);
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 1rem 0;
}

.tool-instructions ol {
  color: var(--text-secondary);
  line-height: 1.8;
  margin: 0;
  padding-left: 1.5rem;
}

.tool-instructions li {
  margin-bottom: 0.5rem;
}

/* AI Tools Note */
.ai-tools-note {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: 12px;
  padding: 1.5rem;
  margin: 2rem 0;
}

.ai-tools-note h4 {
  color: var(--ai-warning);
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 1rem 0;
}

.ai-tools-note p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* Download Tools Modal */
.download-tools-modal .modal-content {
  max-width: 1000px;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

/* Quick Modal */
.quick-modal .modal-content {
  max-width: 500px;
}

.guide-steps-min {
  color: var(--text-secondary);
  line-height: 1.8;
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.guide-steps-min li {
  margin-bottom: 0.75rem;
}

.example-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0;
}

.example-chip {
  background: rgba(100, 255, 218, 0.1);
  color: var(--ai-accent);
  border: 1px solid rgba(100, 255, 218, 0.2);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
}

.example-chip:hover {
  background: rgba(100, 255, 218, 0.2);
  border-color: var(--ai-accent);
  transform: translateY(-1px);
}

.important-notes {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
  border-radius: 8px;
  padding: 1rem;
  margin: 1rem 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.important-notes.small {
  font-size: 0.8rem;
  padding: 0.75rem;
}

/* AI Tool Modal */
.ai-tool-modal .modal-content {
  max-width: 800px;
}

.ai-input-section {
  margin-bottom: 2rem;
}

.ai-input-section label {
  display: block;
  color: var(--ai-accent);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.ai-input-section textarea,
.ai-input-section input[type="text"],
.ai-input-section input[type="file"],
.ai-input-section select {
  width: 100%;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(100, 255, 218, 0.2);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 1rem;
  transition: all 0.3s ease;
}

.ai-input-section textarea:focus,
.ai-input-section input[type="text"]:focus,
.ai-input-section select:focus {
  outline: none;
  border-color: var(--ai-accent);
  box-shadow: 0 0 0 3px rgba(100, 255, 218, 0.1);
}

.ai-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.ai-output-section {
  background: rgba(100, 255, 218, 0.05);
  border: 1px solid rgba(100, 255, 218, 0.1);
  border-radius: 8px;
  padding: 1.5rem;
  margin-top: 1.5rem;
}

.ai-output-section h4 {
  color: var(--ai-accent);
  margin: 0 0 1rem 0;
}

.generated-content,
.processed-image,
.analysis-results {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(100, 255, 218, 0.1);
  border-radius: 8px;
  padding: 1rem;
  min-height: 100px;
  color: var(--text-secondary);
}

/* Skeleton Loading */
.skeleton-line {
  height: 1rem;
  background: linear-gradient(90deg, rgba(100, 255, 218, 0.1) 25%, rgba(100, 255, 218, 0.2) 50%, rgba(100, 255, 218, 0.1) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
  border-radius: 4px;
  margin-bottom: 0.5rem;
}

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

/* Notification System */
.notification-container {
  position: fixed;
  top: 100px;
  right: 20px;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.notification {
  background: var(--ai-gradient-card);
  border: 1px solid rgba(100, 255, 218, 0.2);
  border-radius: 8px;
  padding: 1rem 1.5rem;
  color: var(--text-primary);
  font-weight: 500;
  box-shadow: var(--ai-shadow-card);
  transform: translateX(100%);
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  max-width: 350px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.notification.show {
  transform: translateX(0);
  opacity: 1;
}

.notification-success {
  border-color: rgba(16, 185, 129, 0.3);
  background: rgba(16, 185, 129, 0.1);
}

.notification-warning {
  border-color: rgba(245, 158, 11, 0.3);
  background: rgba(245, 158, 11, 0.1);
}

.notification-error {
  border-color: rgba(239, 68, 68, 0.3);
  background: rgba(239, 68, 68, 0.1);
}

.notification button {
  background: none;
  border: none;
  color: inherit;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background 0.2s ease;
}

.notification button:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
  .modal-content {
    margin: 1rem;
    max-width: calc(100vw - 2rem);
    max-height: calc(100vh - 2rem);
  }
  
  .modal-header,
  .modal-body,
  .modal-footer {
    padding: 1rem;
  }
  
  .ai-tools-grid,
  .tools-grid {
    grid-template-columns: 1fr;
  }
  
  .ai-options {
    grid-template-columns: 1fr;
  }
  
  .notification {
    right: 10px;
    left: 10px;
    max-width: none;
  }
}

/* Performance Optimizations */
.modal-overlay {
  will-change: opacity, visibility;
}

.modal-content {
  will-change: transform;
}

/* Fast Loading States */
.modal-overlay.loading {
  background: rgba(10, 25, 47, 0.98);
}

.modal-overlay.loading .modal-content {
  animation: modal-pulse 1.5s ease-in-out infinite;
}

@keyframes modal-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.8; }
}

/* =============================================================================
   MODERN MODAL SYSTEM - FAST LOADING & PROFESSIONAL DESIGN
   ============================================================================= */