/* CSS Custom Properties */
:root {
  /* Colors - Evolve AI Brand - Enhanced for Accessibility */
  --color-primary: #0F2A44;      /* Darker blue for better contrast */
  --color-primary-light: #1B365D; /* Original primary for accents */
  --color-secondary: #E53E3E;    /* Darker coral for better contrast */
  --color-accent: #319795;       /* Darker teal for better contrast */
  --color-neutral: #F7F9FC;      /* Warm gray */
  
  /* Enhanced text colors for better accessibility */
  --text-primary: #1A202C;       /* High contrast main text */
  --text-secondary: #4A5568;     /* Medium contrast secondary text */
  --text-muted: #718096;         /* Light contrast muted text */
  
  /* Background colors */
  --bg-primary: #FFFFFF;
  --bg-secondary: #F7FAFC;
  --bg-accent: #EDF2F7;
  
  /* Gray Scale */
  --color-gray-50: #F9FAFB;
  --color-gray-100: #F3F4F6;
  --color-gray-200: #E5E7EB;
  --color-gray-300: #D1D5DB;
  --color-gray-400: #9CA3AF;
  --color-gray-500: #6B7280;
  --color-gray-600: #4B5563;
  --color-gray-700: #374151;
  --color-gray-800: #1F2937;
  --color-gray-900: #111827;
  
  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Source Serif Pro', Georgia, serif;
  
  /* Font Sizes */
  --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;
  
  /* Line Heights */
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  
  /* Spacing */
  --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;
  
  /* Container */
  --container-max-width: 1200px;
  --container-padding: var(--space-4);
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  
  /* 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);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
}

/* Dark mode variables - Enhanced for accessibility */
@media (prefers-color-scheme: dark) {
  :root {
    --color-neutral: #1F2937;
    --color-gray-50: #111827;
    --color-gray-100: #1F2937;
    --color-gray-800: #F3F4F6;
    --color-gray-900: #F9FAFB;
    
    /* Enhanced text colors for dark mode */
    --text-primary: #F7FAFC;
    --text-secondary: #E2E8F0;
    --text-muted: #A0AEC0;
    --bg-primary: #1A202C;
    --bg-secondary: #2D3748;
    --bg-accent: #4A5568;
  }
}

[data-theme="dark"] {
  --color-neutral: #1F2937;
  --color-gray-50: #111827;
  --color-gray-100: #1F2937;
  --color-gray-800: #F3F4F6;
  --color-gray-900: #F9FAFB;
  
  /* Enhanced text colors for dark mode */
  --text-primary: #F7FAFC;
  --text-secondary: #E2E8F0;
  --text-muted: #A0AEC0;
  --bg-primary: #1A202C;
  --bg-secondary: #2D3748;
  --bg-accent: #4A5568;
}

/* Reset & Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  line-height: 1.6; /* Improved for accessibility */
  color: var(--text-primary, var(--color-gray-800));
  background-color: var(--bg-primary, var(--color-neutral));
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography - Enhanced for accessibility */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 600;
  line-height: 1.4; /* Improved readability */
  color: var(--text-primary, var(--color-gray-900));
  margin-bottom: var(--space-4);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
  margin-bottom: var(--space-6);
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: all var(--transition-fast);
}

a:hover {
  color: var(--color-accent);
  text-decoration-thickness: 2px;
}

/* Enhanced focus styles for accessibility */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 3px;
}

/* High contrast focus for dark mode */
[data-theme="dark"] a:focus-visible,
[data-theme="dark"] button:focus-visible,
[data-theme="dark"] input:focus-visible {
  outline-color: #4FD1C7;
  box-shadow: 0 0 0 3px rgba(79, 209, 197, 0.3);
}

/* Layout */
.container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Header */
.site-header {
  background: var(--color-neutral);
  border-bottom: 1px solid var(--color-gray-200);
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(10px);
}

.header__content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) 0;
}

.header__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: var(--text-xl);
  color: var(--color-primary);
}

.tagline {
  font-size: var(--text-sm);
  color: var(--text-secondary, var(--color-gray-600));
  margin: 0;
}

/* Navigation */
.main-nav {
  display: none;
}

@media (min-width: 768px) {
  .main-nav {
    display: block;
  }
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

.nav__link {
  font-family: var(--font-sans);
  font-weight: 500;
  color: var(--text-secondary, var(--color-gray-700));
  padding: var(--space-3) var(--space-2); /* Improved touch targets */
  min-height: 44px; /* WCAG minimum */
  display: flex;
  align-items: center;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.nav__link:hover,
.nav__link--active {
  color: var(--color-primary);
  border-bottom-color: var(--color-accent);
}

/* Dropdown */
.nav__item--dropdown {
  position: relative;
}

.nav__dropdown-trigger {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.nav__dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  background: white;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-normal);
  list-style: none;
  padding: var(--space-2);
  margin-top: var(--space-2);
}

.nav__item--dropdown:hover .nav__dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav__dropdown-link {
  display: block;
  padding: var(--space-3) var(--space-4); /* Improved touch targets */
  min-height: 44px; /* WCAG minimum */
  color: var(--text-secondary, var(--color-gray-700));
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
}

.nav__dropdown-link:hover {
  background-color: var(--color-gray-50);
  color: var(--color-primary);
}

/* Header Actions */
.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.search-toggle,
.theme-toggle,
.mobile-menu-toggle {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-3); /* Increased for better touch targets */
  min-width: 44px; /* WCAG minimum touch target size */
  min-height: 44px;
  border-radius: var(--radius-md);
  color: var(--text-secondary, var(--color-gray-600));
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-toggle:hover,
.theme-toggle:hover {
  background-color: var(--color-gray-100);
  color: var(--color-primary);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

@media (min-width: 768px) {
  .mobile-menu-toggle {
    display: none;
  }
}

.hamburger {
  width: 20px;
  height: 2px;
  background-color: currentColor;
  transition: all var(--transition-fast);
}

/* Theme Toggle */
.theme-icon--dark {
  display: none;
}

[data-theme="dark"] .theme-icon--light {
  display: none;
}

[data-theme="dark"] .theme-icon--dark {
  display: block;
}

/* Search Modal */
.search-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 100;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.search-modal.is-open {
  opacity: 1;
  visibility: visible;
}

.search-modal__content {
  background: white;
  margin: var(--space-20) auto;
  max-width: 600px;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.search-modal__header {
  display: flex;
  align-items: center;
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-gray-200);
}

.search-input {
  flex: 1;
  border: none;
  outline: none;
  font-size: var(--text-lg);
  font-family: var(--font-sans);
  background: transparent;
}

.search-close {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  color: var(--color-gray-500);
}

.search-results {
  max-height: 400px;
  overflow-y: auto;
  padding: var(--space-4);
}

.search-result {
  display: block;
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-gray-200);
  transition: background-color var(--transition-fast);
  text-decoration: none;
  color: inherit;
}

.search-result:hover {
  background-color: var(--color-gray-50);
}

.search-result__title {
  margin-bottom: var(--space-2);
  font-size: var(--text-lg);
  font-weight: 600;
}

.search-result__excerpt {
  margin-bottom: var(--space-2);
  color: var(--color-gray-600);
}

.search-result__meta {
  display: flex;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-gray-500);
}

.search-result__category {
  background-color: var(--color-accent);
  color: white;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
}

.search-no-results {
  text-align: center;
  padding: var(--space-8);
  color: var(--color-gray-500);
}

mark {
  background-color: #FFEB3B;
  color: var(--color-gray-900);
  padding: 0 var(--space-1);
  border-radius: var(--radius-sm);
}

/* Post Styles */
.post__header {
  padding: var(--space-16) 0 var(--space-8);
  text-align: center;
}

.post__categories {
  margin-bottom: var(--space-4);
}

.category-tag {
  display: inline-block;
  background-color: var(--color-accent);
  color: white;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  font-weight: 500;
  margin-right: var(--space-2);
}

.category-tag--small {
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-2);
}

.post__title {
  font-size: var(--text-5xl);
  margin-bottom: var(--space-6);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.post__description {
  font-size: var(--text-xl);
  color: var(--color-gray-600);
  max-width: 600px;
  margin: 0 auto var(--space-6);
}

.post__meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-gray-500);
}

.post__image {
  margin-bottom: var(--space-12);
}

.post__image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-xl);
}

.post__content {
  padding-bottom: var(--space-16);
}

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

.post__body h2 {
  margin-top: var(--space-12);
  margin-bottom: var(--space-6);
}

.post__body h3 {
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
}

.post__body ul,
.post__body ol {
  margin-bottom: var(--space-6);
  padding-left: var(--space-6);
}

.post__body li {
  margin-bottom: var(--space-2);
}

.post__body blockquote {
  border-left: 4px solid var(--color-accent);
  padding-left: var(--space-6);
  margin: var(--space-8) 0;
  font-style: italic;
  color: var(--color-gray-600);
}

.post__body code {
  background-color: var(--color-gray-100);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
}

.post__body pre {
  background-color: var(--color-gray-900);
  color: var(--color-gray-100);
  padding: var(--space-6);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  margin: var(--space-8) 0;
}

.post__body pre code {
  background: none;
  padding: 0;
  color: inherit;
}

/* Callout Component */
.callout {
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin: var(--space-8) 0;
}

.callout--info {
  background-color: #EBF8FF;
  border-left: 4px solid #3182CE;
}

.callout--warning {
  background-color: #FFFAF0;
  border-left: 4px solid #DD6B20;
}

.callout--success {
  background-color: #F0FFF4;
  border-left: 4px solid #38A169;
}

/* Newsletter Signup */
.newsletter-signup {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: white;
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  text-align: center;
  margin: var(--space-12) 0;
}

.newsletter-signup h3 {
  color: white;
  margin-bottom: var(--space-3);
}

.newsletter-signup p {
  margin-bottom: var(--space-6);
  opacity: 0.9;
}

.form-group {
  display: flex;
  gap: var(--space-3);
  max-width: 400px;
  margin: 0 auto;
}

.form-group input {
  flex: 1;
  padding: var(--space-4); /* Better touch targets */
  min-height: 44px; /* WCAG minimum */
  border: 2px solid var(--color-gray-300);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  transition: border-color var(--transition-fast);
}

.form-group input:focus {
  border-color: var(--color-accent);
  outline: none;
}

/* Enhanced form accessibility */
.form-group input:invalid {
  border-color: var(--color-secondary);
}

.form-group input::placeholder {
  color: var(--text-muted, var(--color-gray-500));
}

.form-group button {
  background-color: var(--color-secondary);
  color: white;
  border: none;
  padding: var(--space-4) var(--space-6); /* Improved touch targets */
  min-height: 44px; /* WCAG minimum */
  border-radius: var(--radius-lg);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: var(--text-base); /* Ensure readable text size */
}

.form-group button:hover {
  background-color: #FF5252;
}

/* Social Share */
.social-share {
  margin: var(--space-12) 0;
  text-align: center;
}

.social-buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  margin-top: var(--space-4);
}

.social-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4) var(--space-6); /* Better touch targets */
  min-height: 44px; /* WCAG minimum */
  border-radius: var(--radius-lg);
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: var(--text-base);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.social-btn:hover {
  transform: translateY(-2px);
}

.social-btn--twitter {
  background-color: #1DA1F2;
  color: white;
}

.social-btn--linkedin {
  background-color: #0077B5;
  color: white;
}

/* Post Grid */
.post-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-8);
  margin-top: var(--space-8);
}

.post-card {
  background: white;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

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

.post-card__image img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.post-card__content {
  padding: var(--space-6);
}

.post-card__title {
  margin-bottom: var(--space-3);
}

.post-card__title a {
  color: var(--color-gray-900);
}

.post-card__excerpt {
  color: var(--color-gray-600);
  margin-bottom: var(--space-4);
}

.post-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  font-family: var(--font-sans);
}

/* Footer */
.site-footer {
  background-color: var(--color-gray-900);
  color: var(--color-gray-300);
  padding: var(--space-16) 0 var(--space-8);
  margin-top: var(--space-20);
}

.footer__content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.footer__brand h3 {
  color: white;
  margin-bottom: var(--space-4);
}

.footer__links h4,
.footer__social h4 {
  color: white;
  margin-bottom: var(--space-4);
}

.footer__links ul {
  list-style: none;
}

.footer__links li {
  margin-bottom: var(--space-2);
}

.footer__links a,
.footer__social a {
  color: var(--color-gray-300);
  transition: color var(--transition-fast);
}

.footer__links a:hover,
.footer__social a:hover {
  color: var(--color-accent);
}

.footer__bottom {
  border-top: 1px solid var(--color-gray-700);
  padding-top: var(--space-8);
  text-align: center;
}

/* Tag Styles */
.tag-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tag {
  background-color: var(--color-gray-100);
  color: var(--color-gray-700);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  font-family: var(--font-sans);
  transition: background-color var(--transition-fast);
}

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

/* Mobile Navigation - Enhanced for accessibility */
@media (max-width: 767px) {
  .main-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary, var(--color-neutral));
    z-index: 60;
    padding: var(--space-20) var(--space-4) var(--space-4);
    overflow-y: auto; /* Ensure scrolling if needed */
  }
  
  .main-nav.is-open {
    display: block;
  }
  
  .nav__list {
    flex-direction: column;
    gap: var(--space-3); /* Improved spacing between items */
    align-items: stretch;
  }
  
  .nav__link {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    min-height: 48px; /* Larger touch targets for mobile */
    border-bottom: none;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    text-align: center;
    font-size: var(--text-lg); /* Larger text for mobile */
  }
  
  .nav__dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: transparent;
    margin-top: var(--space-2);
  }
  
  .nav__dropdown-link {
    min-height: 48px; /* Larger touch targets for mobile */
    font-size: var(--text-base);
  }
}

/* Responsive Design - Enhanced for mobile accessibility */
@media (max-width: 767px) {
  /* Ensure minimum base font size for mobile */
  html {
    font-size: 16px; /* Minimum recommended size */
  }
  
  .header__brand {
    flex-direction: row;
    align-items: center;
    gap: var(--space-3);
  }
  
  .tagline {
    display: none;
  }
  
  .post__title {
    font-size: var(--text-3xl);
    line-height: 1.3; /* Tighter for mobile */
  }
  
  .post__meta {
    flex-direction: column;
    gap: var(--space-3); /* Improved spacing */
  }
  
  .form-group {
    flex-direction: column;
    gap: var(--space-3); /* Better spacing between form elements */
  }
  
  .social-buttons {
    flex-direction: column;
    align-items: center;
    gap: var(--space-3); /* Better spacing */
  }
  
  .hero {
    padding: var(--space-12) 0;
  }
  
  .hero__tagline {
    font-size: var(--text-xl);
  }
  
  .hero__description {
    font-size: var(--text-lg); /* Larger for better readability */
  }
  
  /* Ensure touch targets are properly sized on mobile */
  .category-link {
    min-height: 48px;
    padding: var(--space-4);
  }
  
  .tag {
    min-height: 36px;
    padding: var(--space-2) var(--space-3);
  }
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: white;
  padding: var(--space-20) 0;
  text-align: center;
}

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

.hero__tagline {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-4);
  opacity: 0.9;
}

.hero__description {
  font-size: var(--text-lg);
  margin-bottom: var(--space-8);
  opacity: 0.8;
}

/* Buttons - Enhanced for accessibility */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4) var(--space-6); /* Better touch targets */
  min-height: 44px; /* WCAG minimum touch target */
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: var(--text-base); /* Ensure readable size */
  text-decoration: none;
  transition: all var(--transition-fast);
  font-family: var(--font-sans);
  border: 2px solid transparent; /* For better focus visibility */
}

.btn:hover {
  transform: translateY(-2px);
}

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

.btn--secondary {
  background-color: var(--color-gray-100);
  color: var(--color-gray-900);
}

/* Section Styles */
.featured-posts,
.latest-posts {
  padding: var(--space-16) 0;
}

.section__actions {
  text-align: center;
  margin-top: var(--space-8);
}

/* Page Header */
.page-header {
  text-align: center;
  padding: var(--space-16) 0 var(--space-8);
}

.page-header h1 {
  margin-bottom: var(--space-4);
}

.page-header p {
  font-size: var(--text-xl);
  color: var(--color-gray-600);
  max-width: 600px;
  margin: 0 auto;
}

/* Skip Navigation - Accessibility Enhancement */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--color-primary);
  color: white;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  z-index: 1000;
  transition: top var(--transition-fast);
}

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

/* Motion Preferences - Accessibility */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Utilities */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Category Pages */
.category-hero {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  padding: var(--space-16) 0 var(--space-12);
  color: white;
  text-align: center;
}

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

.category-description {
  font-size: var(--text-lg);
  opacity: 0.9;
  margin-bottom: var(--space-6);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.category-meta {
  opacity: 0.8;
}

.category-posts {
  padding: var(--space-16) 0;
}

.all-categories {
  background-color: var(--color-gray-50);
  padding: var(--space-12) 0;
}

.category-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.category-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4);
  background: white;
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--color-gray-900);
  transition: all var(--transition-base);
  border: 1px solid var(--color-gray-200);
}

.category-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
  border-color: var(--color-accent);
}

.category-name {
  font-weight: 600;
  color: var(--color-primary);
}

.category-count {
  color: var(--color-gray-600);
  font-size: var(--text-sm);
}

/* Topics Index */
.topics-hero {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  padding: var(--space-16) 0;
  color: white;
  text-align: center;
}

.topics-grid {
  padding: var(--space-16) 0;
}

.category-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-8);
}

.category-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-base);
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.1);
  border-color: var(--color-accent);
}

.category-card__title a {
  color: var(--color-primary);
  text-decoration: none;
  font-size: var(--text-2xl);
  font-weight: 700;
}

.category-card__meta {
  margin-top: var(--space-2);
  color: var(--color-gray-600);
}

.category-card__description {
  margin: var(--space-4) 0;
  color: var(--color-gray-700);
  line-height: var(--leading-relaxed);
}

.category-card__posts h3 {
  font-size: var(--text-lg);
  margin-bottom: var(--space-3);
  color: var(--color-gray-900);
}

.recent-posts-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.recent-post {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-gray-100);
}

.recent-post:last-child {
  border-bottom: none;
}

.recent-post__title {
  color: var(--color-gray-800);
  text-decoration: none;
  font-weight: 500;
  flex: 1;
  margin-right: var(--space-3);
  line-height: var(--leading-tight);
}

.recent-post__title:hover {
  color: var(--color-primary);
}

.recent-post__date {
  color: var(--color-gray-500);
  font-size: var(--text-sm);
  white-space: nowrap;
}

.category-card__footer {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-gray-100);
}

.all-posts-cta {
  background-color: var(--color-gray-50);
  padding: var(--space-16) 0;
  text-align: center;
}

.cta-content h2 {
  margin-bottom: var(--space-4);
  color: var(--color-gray-900);
}

.cta-content p {
  margin-bottom: var(--space-6);
  color: var(--color-gray-700);
}

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

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

/* Language Switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  margin-right: var(--space-4);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  background: var(--color-gray-100);
  color: var(--color-gray-700);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition-base);
  border: 1px solid var(--color-gray-200);
}

.lang-switch:hover {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

.lang-switch:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

@media (max-width: 768px) {
  .category-cards {
    grid-template-columns: 1fr;
  }
  
  .category-list {
    grid-template-columns: 1fr;
  }
  
  .recent-post {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .recent-post__date {
    margin-top: var(--space-1);
  }
  
  .lang-switcher {
    margin-right: var(--space-2);
  }
  
  .lang-switch {
    padding: var(--space-1) var(--space-2);
    font-size: var(--text-xs);
  }
}