/* Critical CSS optimizations and modern features */
:root {
  /* Colors */
  --primary-color: #1e40af;
  --primary-dark: #1e3a8a;
  --primary-light: #3b82f6;
  --secondary-color: #64748b;
  --accent-color: #f59e0b;
  --success-color: #10b981;
  --danger-color: #ef4444;
  --background: #ffffff;
  --surface: #f8fafc;
  --surface-dark: #f1f5f9;
  --border: #e2e8f0;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  /* Shadows with better performance */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
  --gradient-surface: linear-gradient(135deg, var(--surface) 0%, var(--background) 100%);
  
  /* Typography scale */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  
  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  
  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-normal: 300ms ease-out;
  --transition-slow: 500ms ease-out;
  
  /* Container queries support */
  --container-padding: clamp(1rem, 5vw, 2rem);
  --container-max-width: 1200px;
  
  /* Performance optimizations */
  --will-change-transform: will-change: transform;
  --will-change-opacity: will-change: opacity;
  --contain-layout: contain: layout;
  --contain-style: contain: style;
  --contain-paint: contain: paint;
}

/* Modern CSS reset with better defaults */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Improved base styles */
html {
  scroll-behavior: smooth;
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
  font-display: swap;
  /* Performance optimizations */
  contain: layout style;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'kern' 1, 'liga' 1, 'calt' 1;
  overflow-x: hidden;
  contain: layout style;
  /* Performance optimizations */
  will-change: scroll-position;
}

/* Container with modern responsive design */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  contain: layout;
}

/* Improved header with better performance */
header {
  text-align: center;
  padding: var(--space-20) 0 var(--space-16);
  background: var(--gradient-surface);
  border-bottom: 1px solid var(--border);
  position: relative;
  overflow: hidden;
  contain: layout style;
}

header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgb(30 64 175 / 0.02) 0%, rgb(59 130 246 / 0.02) 100%);
  pointer-events: none;
}

/* Optimized profile image */
.profile-image {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto var(--space-10);
  border: 6px solid var(--background);
  box-shadow: var(--shadow-xl);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  position: relative;
  z-index: 1;
  will-change: transform;
  aspect-ratio: 1;
  contain: layout style;
  /* Performance optimizations */
  transform: translateZ(0);
  backface-visibility: hidden;
}

.profile-image:hover {
  transform: scale(1.05) translateZ(0);
  box-shadow: 0 25px 50px -12px rgb(0 0 0 / 0.25);
}

/* Typography improvements */
h1 {
  font-size: clamp(2.5rem, 8vw, var(--text-6xl));
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  letter-spacing: -0.025em;
  position: relative;
  z-index: 1;
  line-height: 1.1;
  contain: layout;
}

.title {
  font-size: clamp(1.25rem, 4vw, var(--text-2xl));
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: var(--space-3);
  position: relative;
  z-index: 1;
  contain: layout;
}

.subtitle {
  font-size: clamp(1rem, 3vw, var(--text-lg));
  color: var(--text-secondary);
  font-weight: 400;
  margin-bottom: var(--space-10);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
  position: relative;
  z-index: 1;
  contain: layout;
}

/* Improved social links */
.social-links {
  display: flex;
  justify-content: center;
  gap: var(--space-3);
  flex-wrap: nowrap;
  position: relative;
  z-index: 1;
  contain: layout;
  overflow-x: auto;
  padding: var(--space-2) 0;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
  /* Performance optimizations */
  will-change: scroll-position;
}

.social-links::-webkit-scrollbar {
  height: 4px;
}

.social-links::-webkit-scrollbar-track {
  background: transparent;
}

.social-links::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

.social-links .btn {
  font-size: var(--text-sm) !important;
  padding: var(--space-3) var(--space-4) !important;
  min-height: 44px !important;
  white-space: nowrap;
  flex-shrink: 0;
}

/* Enhanced button design */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-6);
  background: var(--gradient-primary);
  color: white;
  text-decoration: none;
  border-radius: 12px;
  font-weight: 600;
  font-size: var(--text-base);
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  will-change: transform;
  font-family: inherit;
  line-height: 1;
  contain: layout style;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgb(255 255 255 / 0.2), transparent);
  transform: translateX(-100%);
  transition: transform var(--transition-slow);
}

.btn:hover::before {
  transform: translateX(100%);
}

.btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

.btn i {
  font-size: var(--text-lg);
}

/* Main content improvements */
main {
  padding: var(--space-16) 0;
  contain: layout;
}

section {
  margin-bottom: var(--space-20);
  contain: layout;
}

/* Enhanced headings */
h2 {
  font-size: clamp(2rem, 6vw, var(--text-5xl));
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-8);
  letter-spacing: -0.025em;
  position: relative;
  line-height: 1.2;
  contain: layout;
}

h2::after {
  content: '';
  position: absolute;
  bottom: -var(--space-2);
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

h3 {
  font-size: clamp(1.5rem, 4vw, var(--text-3xl));
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-5);
  letter-spacing: -0.025em;
  line-height: 1.3;
  contain: layout;
}

h4 {
  font-size: clamp(1.125rem, 3vw, var(--text-xl));
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  line-height: 1.4;
  contain: layout;
}

/* Improved typography */
p {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  line-height: 1.7;
  contain: layout;
}

ul {
  list-style: none;
  margin-bottom: var(--space-6);
  contain: layout;
}

li {
  position: relative;
  padding-left: var(--space-6);
  margin-bottom: var(--space-3);
  color: var(--text-secondary);
  line-height: 1.6;
  contain: layout;
}

li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.75rem;
  width: 6px;
  height: 6px;
  background: var(--primary-color);
  border-radius: 50%;
}

/* Navigation with improved performance */
.nav-tabs {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin: var(--space-8) 0;
  flex-wrap: nowrap;
  overflow-x: auto;
  padding: var(--space-2) 0;
  contain: layout style;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.nav-tabs::-webkit-scrollbar {
  height: 4px;
}

.nav-tabs::-webkit-scrollbar-track {
  background: transparent;
}

.nav-tabs::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}

.nav-tab {
  padding: var(--space-2) var(--space-4);
  background: var(--surface);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 8px;
  font-weight: 500;
  transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
  border: 1px solid var(--border);
  white-space: nowrap;
  font-size: var(--text-sm);
  contain: layout style;
}

.nav-tab:hover {
  background: var(--surface-dark);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.nav-tab.active {
  background: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.nav-tab:focus-visible {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Cards */
.card {
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  margin-bottom: 2rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  contain: layout;
  box-shadow: var(--shadow-sm);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

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

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* Links */
a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--primary-dark);
}

/* Contact Info */
.contact-info {
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  margin-top: 2rem;
  contain: layout;
  box-shadow: var(--shadow-sm);
}

.contact-info::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(30, 64, 175, 0.02) 0%, rgba(59, 130, 246, 0.02) 100%);
  border-radius: 12px;
  pointer-events: none;
}

.related-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
  contain: layout;
}

.related-links .btn {
  justify-content: center;
  text-align: center;
  min-height: 60px;
}

/* Footer */
footer {
  text-align: center;
  padding: 3rem 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  contain: layout;
}

/* Back Link */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: var(--surface);
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 8px;
  font-weight: 500;
  transition: all 0.3s ease;
  border: 1px solid var(--border);
  margin-bottom: 2rem;
  contain: layout;
}

.back-link:hover {
  background: var(--surface-dark);
  color: var(--text-primary);
  transform: translateY(-1px);
}

/* About Section */
.about-section {
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  margin-bottom: 3rem;
  contain: layout;
  box-shadow: var(--shadow-sm);
}

.about-section h3 {
  color: var(--primary-color);
  margin-bottom: 1rem;
  font-size: 1.5rem;
}

.about-section p {
  margin-bottom: 1rem;
  line-height: 1.7;
}

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

/* Year Section */
.year-section {
  margin-bottom: 4rem;
  contain: layout;
}

.year-section h2 {
  color: var(--primary-color);
  font-size: 2rem;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--border);
  padding-bottom: 0.5rem;
  contain: layout;
}

.year-section h2::after {
  display: none;
}

/* Experience Items */
.experience-item {
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  margin-bottom: 2rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  contain: layout;
  box-shadow: var(--shadow-sm);
}

.experience-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.3s ease;
  border-radius: 12px 12px 0 0;
}

.experience-item:hover::before {
  transform: scaleX(1);
}

.experience-item:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  border-color: var(--primary-color);
  background: var(--background);
}

.experience-title {
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
  line-height: 1.3;
}

.experience-company {
  color: var(--primary-dark);
  font-weight: 700;
  font-size: 1.125rem;
  margin-bottom: 0.25rem;
}

.experience-date {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
}

/* Blog Posts */
.blog-post {
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  contain: layout;
  box-shadow: var(--shadow-sm);
}

.blog-post::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.blog-post:hover::before {
  transform: scaleX(1);
}

.blog-post:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.blog-post a {
  color: var(--text-primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.125rem;
  display: block;
  margin-bottom: 0.5rem;
}

.blog-post a:hover {
  color: var(--primary-color);
}

.blog-post .date {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
}

/* Blog Grid and Cards */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
  contain: layout;
}

.blog-card {
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  contain: layout;
  box-shadow: var(--shadow-sm);
}

.blog-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

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

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.blog-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  contain: layout;
}

.blog-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: white;
  background: var(--gradient-primary);
  contain: layout;
}

.blog-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  contain: layout;
}

.blog-description {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.6;
  contain: layout;
}

.blog-stats {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  contain: layout;
}

.blog-stat {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  contain: layout;
}

.blog-stat i {
  color: var(--primary-color);
  contain: layout;
}

/* Map Styles */
.map-container {
  position: relative;
  margin: 3rem 0;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  contain: layout;
}

#map {
  width: 100%;
  height: 500px;
  border-radius: 12px;
  contain: layout;
}

.legend {
  position: absolute;
  top: 20px;
  right: 20px;
  background: var(--background);
  padding: 1rem;
  border-radius: 8px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
  contain: layout;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  contain: layout;
}

.legend-item:last-child {
  margin-bottom: 0;
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid white;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
  contain: layout;
}

.legend-dot.americas {
  background: #e74c3c;
}

.legend-dot.asia-pacific {
  background: #f39c12;
}

.legend-dot.africa {
  background: #9b59b6;
}

.legend-dot.emea {
  background: #27ae60;
}

/* Speaking Event Styles */
.speaking-event {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  margin-bottom: 2rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  contain: layout;
}

.speaking-event::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.speaking-event:hover::before {
  transform: scaleX(1);
}

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

.speaking-event.keynote::before {
  background: linear-gradient(135deg, #f39c12 0%, #e67e22 100%);
}

.speaking-event.workshop::before {
  background: linear-gradient(135deg, #9b59b6 0%, #8e44ad 100%);
}

.speaking-event h3 {
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  font-size: 1.25rem;
  font-weight: 600;
  contain: layout;
}

.event-details {
  color: var(--primary-color);
  font-weight: 600;
  margin-bottom: 1rem;
  font-size: 1rem;
  contain: layout;
}

.description {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.6;
  contain: layout;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  contain: layout;
}

.tag {
  background: var(--surface-dark);
  color: var(--text-secondary);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
  contain: layout;
}

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

/* Info Window Styles */
.info-window {
  padding: 0.5rem;
  max-width: 200px;
  contain: layout;
}

.info-window h3 {
  margin: 0 0 0.5rem 0;
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 600;
  contain: layout;
}

.info-window p {
  margin: 0.25rem 0;
  color: var(--text-secondary);
  font-size: 0.875rem;
  contain: layout;
}


/* Focus Styles for Accessibility */
.btn:focus,
.nav-tab:focus,
a:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Accessibility improvements */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary-color);
  color: white;
  padding: 8px;
  text-decoration: none;
  border-radius: 4px;
  z-index: 1000;
  transition: top 0.3s ease;
}

.skip-link:focus {
  top: 6px;
}

/* Keyboard navigation styles */
.keyboard-navigation *:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* Focus styles for interactive elements */
.btn:focus,
.nav-tab:focus,
.speaking-event:focus-within,
.card:focus-within,
.computer-item:focus-within,
.book-item:focus-within,
.repo-card:focus-within {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
  box-shadow: 0 0 0 4px rgba(30, 64, 175, 0.1);
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 0 1rem;
  }
  
  h1 {
    font-size: 2.5rem;
  }
  
  .title {
    font-size: 1.25rem;
  }
  
  .subtitle {
    font-size: 1rem;
  }
  
  .social-links {
    gap: 0.5rem;
    justify-content: center;
    padding: 0.5rem 0;
  }
  
  .social-links .btn {
    font-size: 0.8rem !important;
    padding: 0.75rem 1rem !important;
    min-height: 40px !important;
  }
  
  .btn {
    padding: 1rem 1.75rem;
    font-size: 0.9rem;
  }
  
  .card {
    padding: 1.5rem;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 2rem;
  }
  
  .profile-image {
    width: 150px;
    height: 150px;
  }
  
  .container {
    padding: 0 0.75rem;
  }
  
  .social-links {
    gap: 0.25rem;
    padding: 0.25rem 0;
  }
  
  .social-links .btn {
    font-size: 0.7rem !important;
    padding: 0.5rem 0.75rem !important;
    min-height: 36px !important;
  }
}

/* Computer Collection Styles */
.computer-item {
  margin-bottom: 3rem;
  padding: 2rem;
  background: var(--surface);
  border-radius: 16px;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  contain: layout;
}

.computer-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.computer-item:hover::before {
  transform: scaleX(1);
}

.computer-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.computer-item h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  letter-spacing: -0.025em;
  contain: layout;
}

.computer-item h3 a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

.computer-item h3 a:hover {
  color: var(--primary-dark);
}

.computer-content {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 2rem;
  align-items: start;
  contain: layout;
}

.computer-image {
  width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: var(--shadow-md);
  transition: transform 0.3s ease;
  contain: layout;
}

.computer-image:hover {
  transform: scale(1.02);
}

.computer-details h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  margin-top: 1rem;
  display: inline-block;
  background: var(--primary-color);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 6px;
  font-size: 0.875rem;
  contain: layout;
}

.computer-details p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
  line-height: 1.5;
  contain: layout;
}

.computer-details ul {
  list-style: none;
  padding: 0;
  margin-bottom: 0.5rem;
  contain: layout;
}

.computer-details li {
  padding: 0.25rem 0;
  padding-left: 1.25rem;
  position: relative;
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.4;
  contain: layout;
}

.computer-details li:last-child {
  margin-bottom: 0;
}

.computer-details li::before {
  content: '•';
  position: absolute;
  left: 0;
  top: 0.25rem;
  color: var(--primary-color);
  font-weight: bold;
  contain: layout;
}

/* Responsive design for computer collection */
@media (max-width: 768px) {
  .computer-content {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .computer-image {
    max-width: 280px;
    margin: 0 auto;
  }
  
  .computer-item {
    padding: 1.5rem;
  }
}

@media (max-width: 480px) {
  .computer-item {
    padding: 1rem;
  }
  
  .computer-item h3 {
    font-size: 1.25rem;
  }
  
  .computer-image {
    max-width: 240px;
  }
}

/* Book Gallery Container */
.book-gallery-container {
  width: 100%;
  contain: layout;
}

/* Book Gallery Styles */
.book-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.25rem;
  margin: 1.5rem 0;
  contain: layout;
}

/* Force multiple columns for larger screens */
@media (min-width: 1200px) {
  .book-gallery {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1600px) {
  .book-gallery {
    grid-template-columns: repeat(3, 1fr);
  }
}

.book-item {
  display: flex;
  gap: 1.25rem;
  padding: 1.25rem;
  background: var(--surface);
  border-radius: 12px;
  border: 1px solid var(--border);
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  contain: layout;
}

.book-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.book-item:hover::before {
  transform: scaleX(1);
}

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

.book-cover {
  width: 90px;
  height: 135px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow-md);
  flex-shrink: 0;
  transition: transform 0.3s ease;
  contain: layout;
}

.book-item:hover .book-cover {
  transform: scale(1.05);
}

.book-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  contain: layout;
}

.book-info strong {
  color: var(--text-primary);
  font-weight: 700;
  margin-bottom: 0.5rem;
  line-height: 1.4;
  font-size: 1rem;
  contain: layout;
}

.book-info em {
  color: var(--text-secondary);
  font-style: italic;
  font-size: 0.875rem;
  margin-bottom: 0.75rem;
  font-weight: 500;
  contain: layout;
}

.book-info:last-child {
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.5;
  contain: layout;
}

@media (max-width: 768px) {
  .book-gallery {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  
  .book-item {
    padding: 1rem;
    gap: 1rem;
  }
  
  .book-cover {
    width: 70px;
    height: 105px;
  }
}

/* Repository Grid Styles */
.repo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
  contain: layout;
}

.repo-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  contain: layout;
  box-shadow: var(--shadow-sm);
}

.repo-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

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

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

.repo-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  gap: 1rem;
  contain: layout;
}

.repo-header h3 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.3;
  contain: layout;
}

.repo-header h3 a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
  contain: layout;
}

.repo-header h3 a:hover {
  color: var(--primary-color);
}

.repo-header h3 a i {
  margin-right: 0.5rem;
  color: var(--primary-color);
  font-size: 0.9em;
  transition: transform var(--transition-fast);
}

.repo-header h3 a:hover i {
  transform: scale(1.1);
}

.repo-language {
  background: var(--primary-color);
  color: white;
  padding: 0.375rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.025em;
  white-space: nowrap;
  contain: layout;
  box-shadow: var(--shadow-sm);
}

.repo-card p {
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
  font-size: 0.95rem;
  contain: layout;
}

/* Repository card variations */
.repo-card:nth-child(1) .repo-language {
  background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
}

.repo-card:nth-child(2) .repo-language {
  background: linear-gradient(135deg, #059669 0%, #10b981 100%);
}

.repo-card:nth-child(3) .repo-language {
  background: linear-gradient(135deg, #dc2626 0%, #ef4444 100%);
}

.repo-card:nth-child(4) .repo-language {
  background: linear-gradient(135deg, #7c3aed 0%, #8b5cf6 100%);
}

/* Featured repository card styles */
.repo-card.featured {
  border: 2px solid var(--primary-color);
  background: linear-gradient(135deg, rgba(30, 64, 175, 0.02) 0%, rgba(59, 130, 246, 0.02) 100%);
  position: relative;
  transform: scale(1.02);
}

.repo-card.featured::before {
  background: var(--gradient-primary);
  opacity: 0.1;
}

.repo-card.featured:hover {
  transform: scale(1.03) translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.repo-card.featured .repo-header h3 a {
  color: var(--primary-color);
  font-weight: 700;
}

/* Feature tags for repositories */
.repo-features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.feature-tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--primary-color);
  color: white;
  border-radius: 1rem;
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.025em;
  transition: all var(--transition-fast);
}

.feature-tag:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

/* Responsive adjustments for repo grid */
@media (max-width: 768px) {
  .repo-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .repo-card {
    padding: 1.5rem;
  }
  
  .repo-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  
  .repo-header h3 {
    font-size: 1.125rem;
  }
  
  .repo-card.featured {
    transform: scale(1.01);
  }
  
  .repo-card.featured:hover {
    transform: scale(1.02) translateY(-1px);
  }
}

@media (max-width: 480px) {
  .repo-card {
    padding: 1.25rem;
  }
  
  .repo-header h3 {
    font-size: 1rem;
  }
  
  .repo-language {
    font-size: 0.7rem;
    padding: 0.25rem 0.5rem;
  }
  
  .repo-features {
    gap: 0.25rem;
  }
  
  .feature-tag {
    font-size: 0.65rem;
    padding: 0.2rem 0.6rem;
  }
}

/* Video Grid Styles */
.video-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  margin: var(--space-8) 0;
}

.video-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 aspect ratio */
  border-radius: var(--space-3);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
  background: var(--surface);
}

.video-container:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
  border-radius: var(--space-3);
}

@media (max-width: 768px) {
  .video-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
} 

/* Years Grid for YouTube Videos */
.years-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-8);
  margin: var(--space-12) 0;
  contain: layout;
}

.year-card {
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: var(--space-8);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  contain: layout;
  box-shadow: var(--shadow-sm);
}

.year-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

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

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

.year-number {
  font-size: var(--text-4xl);
  font-weight: 800;
  color: var(--primary-color);
  margin-bottom: var(--space-4);
  line-height: 1;
}

.year-stats {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-6);
}

.video-count {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  font-weight: 600;
}

.year-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-6);
  background: var(--gradient-primary);
  color: white;
  text-decoration: none;
  border-radius: 12px;
  font-weight: 600;
  transition: all var(--transition-normal);
  width: 100%;
  justify-content: center;
  font-size: var(--text-base);
}

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

@media (max-width: 768px) {
  .years-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
  
  .year-card {
    padding: var(--space-6);
  }
  
  .year-number {
    font-size: var(--text-3xl);
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --primary-color: #000080;
    --text-primary: #000000;
    --text-secondary: #333333;
    --border: #000000;
  }
  
  .btn {
    border: 2px solid var(--primary-color);
  }
  
  .card,
  .speaking-event,
  .computer-item,
  .book-item,
  .repo-card {
    border: 2px solid var(--border);
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .profile-image:hover {
    transform: none;
  }
  
  .btn:hover {
    transform: none;
  }
  
  .card:hover,
  .speaking-event:hover,
  .computer-item:hover,
  .book-item:hover,
  .repo-card:hover {
    transform: none;
  }
}



/* Image styling - center all images with no text wrapping */
img {
  display: block;
  margin: var(--space-6) auto;
  max-width: 100%;
  height: auto;
  clear: both;
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

img:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* Ensure images in links are also centered */
a img {
  display: block;
  margin: var(--space-4) auto;
}

/* For images inside paragraphs, ensure they break out and center */
p img {
  display: block;
  margin: var(--space-6) auto;
  clear: both;
}

/* Special handling for image containers */
.image-container {
  text-align: center;
  margin: var(--space-6) 0;
  clear: both;
}

/* Print styles */
@media print {
  .nav-tabs,
  .social-links,
  .back-link,
  .skip-link {
    display: none !important;
  }
  
  body {
    background: white !important;
    color: black !important;
  }
  
  .card,
  .speaking-event,
  .computer-item,
  .book-item,
  .repo-card {
    break-inside: avoid;
    border: 1px solid #ccc !important;
    background: white !important;
  }
  
  h1, h2, h3, h4 {
    break-after: avoid;
  }
  
  a {
    color: black !important;
    text-decoration: underline !important;
  }
  
  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #666;
  }
  
  /* Ensure images are properly styled in print */
  img {
    max-width: 100% !important;
    page-break-inside: avoid;
    display: block !important;
    margin: 0.5rem auto !important;
  }
}

/* Media & Analysts and Podcasts section styling */
.media-podcasts-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-8);
  margin-bottom: var(--space-16);
  padding: var(--space-8);
  background: var(--surface);
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.media-box,
.podcasts-box {
  background: var(--background);
  padding: var(--space-8);
  border-radius: 8px;
  border: 1px solid var(--border);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.media-box::before,
.podcasts-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.media-box::before {
  background: linear-gradient(135deg, #1e40af 0%, #3b82f6 100%);
}

.podcasts-box::before {
  background: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
}

.media-box:hover::before,
.podcasts-box:hover::before {
  transform: scaleX(1);
}

.media-box:hover,
.podcasts-box:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.media-box h3,
.podcasts-box h3 {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
  position: relative;
  z-index: 1;
}

.media-box p,
.podcasts-box p {
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  line-height: 1.6;
}

.media-box .btn,
.podcasts-box .btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--gradient-primary);
  color: white;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 600;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.media-box .btn::before,
.podcasts-box .btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left var(--transition-normal);
}

.media-box .btn:hover::before,
.podcasts-box .btn:hover::before {
  left: 100%;
}

.media-box .btn:hover,
.podcasts-box .btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.podcasts-box .btn {
  background: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);
}

/* Responsive design for media-podcasts section */
@media (max-width: 768px) {
  .media-podcasts-section {
    grid-template-columns: 1fr;
    gap: var(--space-6);
    padding: var(--space-6);
  }
  
  .media-box,
  .podcasts-box {
    padding: var(--space-6);
  }
  
  .media-box h3,
  .podcasts-box h3 {
    font-size: var(--text-lg);
  }
}

@media (max-width: 480px) {
  .media-podcasts-section {
    padding: var(--space-4);
  }
  
  .media-box,
  .podcasts-box {
    padding: var(--space-5);
  }
}

/* YouTube Stats Styling */
.stats {
  display: flex;
  gap: var(--space-6);
  margin: var(--space-6) 0;
  justify-content: center;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-primary);
  padding: var(--space-4) var(--space-6);
  background: var(--surface);
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  contain: layout style;
}

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

.stat span {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--primary-color);
}

@media (max-width: 768px) {
  .stats {
    flex-direction: column;
    gap: var(--space-4);
  }
  
  .stat {
    font-size: var(--text-lg);
    padding: var(--space-3) var(--space-4);
  }
  
  .stat span {
    font-size: var(--text-lg);
  }
}

@media (max-width: 480px) {
  .stat {
    font-size: var(--text-base);
    padding: var(--space-2) var(--space-3);
  }
  
  .stat span {
    font-size: var(--text-base);
  }
}