/* ============================================
   CodeWithBenji.AI - Modern Design System
   ============================================ */

/* CSS Variables for theming */
:root {
  /* Colors */
  --primary: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --secondary: #ec4899;
  --accent: #06b6d4;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
  --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #312e81 100%);
  --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);

  /* Dark theme colors */
  --bg-dark: #0f172a;
  --bg-card: #1e293b;
  --bg-card-hover: #334155;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Light theme colors */
  --bg-light: #f8fafc;
  --bg-light-card: #ffffff;
  --text-dark: #0f172a;
  --text-dark-secondary: #475569;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;

  /* Border radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.3);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
}

/* Basic reset */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-dark);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }

p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

a {
  color: var(--primary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--secondary);
}

/* ============================================
   Header & Navigation
   ============================================ */

header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--spacing-xs) var(--spacing-lg);
  animation: none;
  border-radius: 0;
}

.header-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  height: 100px;
  width: auto;
  object-fit: contain;
  transition: transform var(--transition-base), filter var(--transition-base);
}

.logo:hover {
  transform: scale(1.05);
  filter: drop-shadow(0 0 10px rgba(99, 102, 241, 0.5));
}

nav ul {
  display: flex;
  list-style: none;
  gap: var(--spacing-xs);
}

nav ul li {
  animation: none;
}

nav a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  position: relative;
}

nav a:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.1);
}

nav a.active {
  color: var(--primary-light);
  background: rgba(99, 102, 241, 0.2);
}

/* Mobile menu button */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 25px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ============================================
   Main Content Area
   ============================================ */

main {
  padding-top: 80px;
  min-height: 100vh;
  animation: none;
  background: transparent;
  margin-top: 0;
  border-radius: 0;
  box-shadow: none;
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  background: var(--gradient-hero);
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-lg);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 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='%236366f1' 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");
  opacity: 0.5;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -50%;
  left: -25%;
  width: 150%;
  height: 100%;
  background: radial-gradient(ellipse at center, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.hero h1 {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-md);
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto var(--spacing-lg);
}

/* AI Badge */
.ai-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: var(--gradient-primary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  color: white;
  margin-bottom: var(--spacing-md);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.4); }
  50% { box-shadow: 0 0 0 10px rgba(99, 102, 241, 0); }
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
  color: white;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  color: var(--text-primary);
}

/* Legacy .btn support */
.btn {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
  color: white;
  background: var(--gradient-primary);
}

/* ============================================
   Content Sections
   ============================================ */

.content, section {
  padding: var(--spacing-2xl) var(--spacing-lg);
  max-width: 1200px;
  margin: 0 auto;
}

section h2 {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  position: relative;
}

section h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--gradient-primary);
  margin: var(--spacing-sm) auto 0;
  border-radius: var(--radius-full);
}

/* ============================================
   Feature Cards
   ============================================ */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--spacing-md);
}

.feature-card h3 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ============================================
   Session Cards (for sessions.html)
   ============================================ */

.sessions-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-lg);
}

.sessions-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.sessions-header h2 {
  margin-bottom: var(--spacing-sm);
}

.sessions-header p {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* Filter Tags */
.filter-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-xl);
}

.filter-tag {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-tag:hover,
.filter-tag.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

/* Sessions Grid */
.sessions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--spacing-lg);
}

.session-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
}

.session-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.session-card-header {
  padding: var(--spacing-md);
  background: var(--gradient-primary);
  position: relative;
}

.session-card-header h3 {
  color: white;
  font-size: 1.1rem;
  margin: 0;
}

.session-level {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  padding: 2px 8px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  color: white;
  font-weight: 600;
}

.session-card-body {
  padding: var(--spacing-md);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.session-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-sm);
}

.session-tag {
  padding: 2px 8px;
  background: rgba(99, 102, 241, 0.2);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  color: var(--primary-light);
}

.session-card-body p {
  font-size: 0.9rem;
  flex: 1;
}

.session-card-footer {
  padding: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.session-link {
  color: var(--primary-light);
  font-weight: 500;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.session-link:hover {
  color: var(--secondary);
}

.github-link {
  color: var(--text-muted);
  font-size: 0.85rem;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.github-link:hover {
  background: rgba(255, 255, 255, 0.2);
  color: var(--text-primary);
}

/* Legacy session list support */
main section ul {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--spacing-md);
}

main section ul li {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

main section ul li:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
}

main section ul li a:first-child {
  font-weight: 500;
  color: var(--text-primary);
  font-size: 1rem;
}

main section ul li a:first-child:hover {
  color: var(--primary-light);
}

/* ============================================
   Stats Section
   ============================================ */

.stats-section {
  background: var(--bg-card);
  padding: var(--spacing-2xl) var(--spacing-lg);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  max-width: 1000px;
  margin: 0 auto;
  text-align: center;
}

.stat-item h3 {
  font-size: 3rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-xs);
}

.stat-item p {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* ============================================
   About Page
   ============================================ */

.about-section {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-lg);
}

.about-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: var(--spacing-lg);
}

.about-card h2 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.about-card h2::after {
  margin: var(--spacing-sm) 0 0 0;
}

.about-card p {
  color: var(--text-secondary);
  line-height: 1.8;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-lg);
}

.about-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  color: white;
}

.vision-section {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  border: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.vision-content {
  max-width: 700px;
  margin: 0 auto;
}

.vision-content h2 {
  margin-top: var(--spacing-md);
}

/* Page Header */
.page-header {
  background: var(--gradient-hero);
  padding: var(--spacing-2xl) var(--spacing-lg);
  text-align: center;
  position: relative;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 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='%236366f1' 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");
  opacity: 0.5;
}

.page-header h1 {
  position: relative;
  z-index: 1;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-sm);
}

.page-header p {
  position: relative;
  z-index: 1;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.1rem;
}

/* Session card with icon */
.session-icon {
  width: 50px;
  height: 50px;
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  color: white;
  flex-shrink: 0;
}

.session-badge {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  background: var(--secondary);
  color: white;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
}

.session-card {
  position: relative;
  padding: var(--spacing-lg);
}

.session-card h3 {
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.session-card p {
  font-size: 0.9rem;
  margin-bottom: var(--spacing-md);
}

.session-links {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-top: auto;
}

/* ============================================
   Footer
   ============================================ */

footer {
  background: var(--bg-card);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--spacing-xl) var(--spacing-lg);
  text-align: center;
  border-radius: 0;
}

footer p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--primary-light);
}

/* ============================================
   Image Gallery
   ============================================ */

.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

.gallery img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: var(--radius-md);
  transition: transform var(--transition-base);
}

.gallery img:hover {
  transform: scale(1.02);
}

.image-section {
  margin-bottom: var(--spacing-xl);
}

.image-section h2 {
  color: var(--text-primary);
}

/* Modern Gallery Grid */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.gallery-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
}

.gallery-card:hover {
  transform: translateY(-5px);
  border-color: var(--primary);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.gallery-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4/3;
}

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

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

.gallery-info {
  padding: var(--spacing-md);
}

.gallery-info h3 {
  color: var(--text-primary);
  font-size: 1rem;
  margin-bottom: var(--spacing-xs);
}

.gallery-info p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin: 0;
}

/* ============================================
   Schedule Cards
   ============================================ */

.schedule-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--spacing-lg);
}

.schedule-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
  display: flex;
  align-items: stretch;
}

.schedule-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
}

.schedule-card.featured {
  border-color: var(--primary);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.05) 100%);
}

.schedule-date {
  background: var(--gradient-primary);
  color: white;
  padding: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 90px;
  font-weight: 700;
  font-size: 0.9rem;
  text-align: center;
}

.schedule-content {
  padding: var(--spacing-md);
  flex: 1;
}

.schedule-content h3 {
  color: var(--text-primary);
  font-size: 1rem;
  margin-bottom: var(--spacing-xs);
}

.schedule-content p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin: 0;
  line-height: 1.5;
}

.schedule-content .session-tag {
  display: inline-block;
  margin-bottom: var(--spacing-xs);
}

/* ============================================
   Tables
   ============================================ */

table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-lg) 0;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  overflow: hidden;
}

th, td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

th {
  background: var(--gradient-primary);
  color: white;
  font-weight: 600;
}

tr:hover {
  background: rgba(255, 255, 255, 0.05);
}

/* ============================================
   Code Blocks
   ============================================ */

pre {
  background: #1a1a2e;
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  overflow-x: auto;
  margin: var(--spacing-md) 0;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

code {
  font-family: 'Fira Code', 'Monaco', 'Consolas', monospace;
  font-size: 0.9rem;
  color: #e2e8f0;
}

/* Inline code */
p code, li code {
  background: rgba(99, 102, 241, 0.2);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--primary-light);
}

/* ============================================
   Animations
   ============================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
}

.animate-float {
  animation: float 3s ease-in-out infinite;
}

/* Staggered animations */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }

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

@media (max-width: 768px) {
  header {
    padding: var(--spacing-sm);
  }

  .header-content {
    flex-wrap: wrap;
  }

  .menu-toggle {
    display: flex;
  }

  nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background: var(--bg-dark);
    padding: 80px var(--spacing-lg) var(--spacing-lg);
    transition: right var(--transition-base);
    border-left: 1px solid rgba(255, 255, 255, 0.1);
  }

  nav.active {
    right: 0;
  }

  nav ul {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  nav a {
    display: block;
    padding: var(--spacing-sm);
  }

  .hero {
    min-height: auto;
    padding: var(--spacing-xl) var(--spacing-sm);
  }

  .hero-content {
    padding: var(--spacing-lg);
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .features-grid,
  .sessions-grid,
  .gallery-grid,
  .schedule-grid {
    grid-template-columns: 1fr;
  }

  main section ul {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .filter-tags {
    gap: var(--spacing-xs);
  }

  .schedule-card {
    flex-direction: column;
  }

  .schedule-date {
    min-width: unset;
    padding: var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 2.5rem;
  }

  .logo {
    height: 40px;
    width: 40px;
  }

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

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

/* ============================================
   Session Details / Article Pages
   ============================================ */

/* Article container */
article {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-lg);
  border: 1px solid rgba(255, 255, 255, 0.1);
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

/* Session info box */
.session-info {
  background: rgba(99, 102, 241, 0.15) !important;
  border: 1px solid rgba(99, 102, 241, 0.3);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.session-info p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

.session-info strong {
  color: var(--text-primary);
}

/* Table of Contents */
.toc {
  background: var(--bg-dark) !important;
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.toc h3 {
  color: var(--text-primary) !important;
  margin-bottom: var(--spacing-sm);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: var(--spacing-xs);
}

.toc ul {
  list-style: none !important;
  padding-left: var(--spacing-sm) !important;
}

.toc ul li {
  margin-bottom: var(--spacing-xs);
  padding: var(--spacing-xs) 0;
  background: transparent !important;
  border: none !important;
}

.toc ul li a {
  color: var(--primary-light);
  font-size: 0.95rem;
}

.toc ul li a:hover {
  color: var(--secondary);
}

/* Note, Warning, Tip boxes */
.note, .warning, .tip {
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.note {
  background: rgba(52, 152, 219, 0.15) !important;
  border-left: 4px solid #3498db !important;
}

.warning {
  background: rgba(241, 196, 15, 0.15) !important;
  border-left: 4px solid #f1c40f !important;
}

.tip {
  background: rgba(46, 204, 113, 0.15) !important;
  border-left: 4px solid #2ecc71 !important;
}

.note p, .warning p, .tip p,
.note h4, .warning h4, .tip h4 {
  color: var(--text-primary) !important;
}

/* Feature grid in articles */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

article .feature-card {
  background: var(--bg-dark) !important;
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  box-shadow: none !important;
}

article .feature-card h3,
article .feature-card h4 {
  color: var(--text-primary) !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1) !important;
  margin-top: 0;
  padding-bottom: var(--spacing-xs);
}

article .feature-card p,
article .feature-card li {
  color: var(--text-secondary) !important;
}

/* Steps container */
.steps {
  background: var(--bg-dark) !important;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.steps ol, .steps ul {
  padding-left: var(--spacing-lg);
}

.steps li {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
  background: transparent !important;
  border: none !important;
  padding: var(--spacing-xs) 0;
}

/* GitHub link button */
article .github-link,
.session-info .github-link {
  background: var(--gradient-primary) !important;
  color: white !important;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
  transition: all var(--transition-base);
}

article .github-link:hover,
.session-info .github-link:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* Override inline styles for article content */
article h1, article h2, article h3, article h4 {
  color: var(--text-primary) !important;
}

article h2 {
  border-bottom: 1px solid rgba(255, 255, 255, 0.2) !important;
  padding-bottom: var(--spacing-xs);
  margin-top: var(--spacing-xl);
}

article p {
  color: var(--text-secondary) !important;
}

article ul, article ol {
  color: var(--text-secondary);
}

article ul li, article ol li {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
}

article strong {
  color: var(--text-primary);
}

article a {
  color: var(--primary-light);
}

article a:hover {
  color: var(--secondary);
}

/* Tables in articles - override inline styles */
article table {
  background: var(--bg-dark) !important;
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: var(--spacing-lg) 0;
}

article th {
  background: var(--gradient-primary) !important;
  color: white !important;
  border: none !important;
  padding: var(--spacing-sm) var(--spacing-md);
}

article td {
  background: transparent !important;
  color: var(--text-secondary) !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1) !important;
  border-left: none !important;
  border-right: none !important;
  padding: var(--spacing-sm) var(--spacing-md);
}

article tr:hover td {
  background: rgba(255, 255, 255, 0.05) !important;
}

/* Code blocks in articles - override inline styles */
article pre {
  background: #0d1117 !important;
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  overflow-x: auto;
  margin: var(--spacing-md) 0;
}

article code {
  font-family: 'Fira Code', 'Monaco', 'Consolas', monospace !important;
  background: transparent !important;
  color: #e6edf3 !important;
  font-size: 0.875rem;
}

article p code, article li code {
  background: rgba(99, 102, 241, 0.2) !important;
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--primary-light) !important;
}

/* Images in articles */
article img {
  border: 1px solid rgba(255, 255, 255, 0.15) !important;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg) !important;
}

/* Header adjustments for article pages */
.header-content h1 {
  display: none; /* Hide h1 in header for detail pages - title goes in article */
}

/* Article page title styling */
article > h1:first-of-type,
article > h2:first-of-type {
  font-size: clamp(1.5rem, 4vw, 2.25rem) !important;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid rgba(99, 102, 241, 0.3) !important;
  margin-top: 0 !important;
}

/* ============================================
   Utilities
   ============================================ */

.text-center { text-align: center; }
.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

/* Glass effect */
.glass {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Hide scrollbar but keep functionality */
.no-scrollbar::-webkit-scrollbar {
  display: none;
}
.no-scrollbar {
  -ms-overflow-style: none;
  scrollbar-width: none;
}