/* ========================================
   CSS Variables & Dark Mode
   ======================================== */

:root {
  /* Colors - Light Mode */
  --color-primary: #2563eb;
  --color-primary-dark: #1e40af;
  --color-secondary: #7c3aed;
  --color-accent: #f59e0b;
  
  --color-bg: #ffffff;
  --color-bg-secondary: #f8fafc;
  --color-bg-tertiary: #e2e8f0;
  
  --color-text: #1e293b;
  --color-text-light: #64748b;
  --color-text-muted: #94a3b8;
  
  --color-border: #e2e8f0;
  --color-shadow: rgba(0, 0, 0, 0.1);
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: 'Space Grotesk', var(--font-primary);
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  
  /* Container */
  --container-width: 1200px;
  --container-narrow: 800px;
}

[data-theme="dark"] {
  --color-bg: #0f172a;
  --color-bg-secondary: #1e293b;
  --color-bg-tertiary: #334155;
  
  --color-text: #f1f5f9;
  --color-text-light: #cbd5e1;
  --color-text-muted: #94a3b8;
  
  --color-border: #334155;
  --color-shadow: rgba(0, 0, 0, 0.3);
}

/* ========================================
   Base Styles
   ======================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

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

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

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.875rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--spacing-md);
}

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

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
  font-size: 1rem;
  text-align: center;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 10px 25px var(--color-shadow);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background-color: var(--color-bg-secondary);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-small {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(10px);
  background-color: rgba(255, 255, 255, 0.95);
}

[data-theme="dark"] .site-header {
  background-color: rgba(15, 23, 42, 0.95);
}

.navbar {
  padding: 1rem 0;
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  font-family: var(--font-heading);
  color: var(--color-text);
  flex-shrink: 0;
}

.logo:hover {
  opacity: 0.9;
  transition: opacity var(--transition-base);
}

.logo-image {
  height: 45px;
  width: auto;
  display: block;
}

.logo-icon {
  font-size: 1.5rem;
  color: var(--color-primary);
}

.logo-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.logo-title {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1;
}

.logo-tagline {
  font-size: 0.5rem;
  font-weight: 400;
  color: var(--color-text-light);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: 0.15rem;
  opacity: 0.7;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex: 1;
  justify-content: flex-end;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--color-text-light);
  font-weight: 500;
  padding: 0.5rem 0;
  position: relative;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-primary);
}

.nav-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-shrink: 0;
}

.search-toggle,
.theme-toggle {
  background: none;
  border: none;
  color: var(--color-text-light);
  font-size: 1.125rem;
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-menu-toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  transition: all var(--transition-fast);
}

/* ========================================
   Search Overlay
   ======================================== */

.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(5px);
  z-index: 2000;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
}

.search-overlay.active {
  display: flex;
}

.search-container {
  background-color: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  max-width: 600px;
  width: 90%;
  position: relative;
}

.search-close {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-text-light);
  cursor: pointer;
  padding: 0.5rem;
}

#search-input {
  width: 100%;
  padding: 1rem;
  font-size: 1.25rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-secondary);
  color: var(--color-text);
  font-family: var(--font-primary);
}

#search-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

#search-results {
  margin-top: var(--spacing-md);
  max-height: 60vh;
  overflow-y: auto;
}

.search-result {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  transition: background-color var(--transition-fast);
}

.search-result:hover {
  background-color: var(--color-bg-secondary);
}

.search-result h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

.search-result p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin: 0;
}

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

.hero {
  padding: var(--spacing-2xl) 0;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.92) 0%, rgba(118, 75, 162, 0.92) 100%), 
              url('/assets/img/hero-ai-detection.jpg') center/cover;
  background-blend-mode: overlay;
  color: white;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: 3.5rem;
  margin-bottom: var(--spacing-md);
  color: white;
}

.hero-description {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xl);
  opacity: 0.95;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.hero-cta .btn {
  min-width: 150px;
}

.hero-cta .btn-secondary {
  background-color: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.3);
  color: white;
}

.hero-cta .btn-secondary:hover {
  background-color: rgba(255, 255, 255, 0.3);
  border-color: white;
}

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

.featured-posts,
.categories-section,
.recent-posts {
  padding: var(--spacing-2xl) 0;
}

.categories-section {
  background-color: var(--color-bg-secondary);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-xl);
}

.section-title {
  font-size: 2rem;
  margin: 0;
}

.view-all {
  color: var(--color-primary);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.view-all:hover {
  gap: 0.75rem;
}

/* ========================================
   Post Cards
   ======================================== */

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.posts-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.post-card {
  background-color: var(--color-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.post-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px var(--color-shadow);
  border-color: var(--color-primary);
}

.post-card-link {
  display: flex;
  flex-direction: column;
  height: 100%;
  color: inherit;
}

.post-card-link:hover {
  color: inherit;
}

.post-card-image {
  position: relative;
  padding-top: 56.25%; /* 16:9 aspect ratio */
  overflow: hidden;
  background-color: var(--color-bg-secondary);
}

.post-card-image img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

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

.post-card-image-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--color-text-muted);
}

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

.post-card-categories {
  margin-bottom: var(--spacing-sm);
}

.category-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background-color: var(--color-primary);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.post-card-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
  line-height: 1.4;
}

.post-card-excerpt {
  color: var(--color-text-light);
  font-size: 0.9rem;
  flex: 1;
  margin-bottom: var(--spacing-md);
}

.post-card-meta {
  display: flex;
  gap: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.post-card-meta span {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

/* ========================================
   Categories Grid
   ======================================== */

.categories-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.category-card {
  background-color: var(--color-bg);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  text-align: center;
  transition: all var(--transition-base);
  color: var(--color-text);
}

.category-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px var(--color-shadow);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.category-card i {
  font-size: 2rem;
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

.category-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.post-count {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

/* ========================================
   Single Post
   ======================================== */

.post-single {
  padding-top: var(--spacing-xl);
}

.post-header {
  padding: var(--spacing-xl) 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--spacing-xl);
}

.post-categories {
  margin-bottom: var(--spacing-md);
}

.post-title {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.post-meta {
  display: flex;
  gap: var(--spacing-lg);
  color: var(--color-text-muted);
  flex-wrap: wrap;
}

.post-meta span {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.post-content {
  padding: var(--spacing-xl) 0;
  font-size: 1.125rem;
  line-height: 1.8;
}

.post-content h2,
.post-content h3,
.post-content h4 {
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

.post-content ul,
.post-content ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
}

.post-content li {
  margin-bottom: var(--spacing-sm);
}

.post-content blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  font-style: italic;
  color: var(--color-text-light);
}

.post-content code {
  background-color: var(--color-bg-secondary);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
  font-family: 'Courier New', monospace;
}

.post-content pre {
  background-color: var(--color-bg-secondary);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: var(--spacing-md);
}

.post-content pre code {
  background: none;
  padding: 0;
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--spacing-md);
}

.post-content th,
.post-content td {
  padding: var(--spacing-sm);
  border: 1px solid var(--color-border);
  text-align: left;
}

.post-content th {
  background-color: var(--color-bg-secondary);
  font-weight: 600;
}

/* ========================================
   Post Share & Navigation
   ======================================== */

.post-share {
  padding: var(--spacing-xl) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.post-share h3 {
  margin-bottom: var(--spacing-md);
  font-size: 1.5rem;
}

.share-buttons {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.share-btn {
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--transition-fast);
  color: white;
}

.share-btn.twitter { background-color: #1da1f2; }
.share-btn.linkedin { background-color: #0077b5; }
.share-btn.facebook { background-color: #4267B2; }

.share-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 15px var(--color-shadow);
  color: white;
}

.post-navigation {
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-xl);
}

.post-navigation .container-narrow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.nav-prev,
.nav-next {
  padding: var(--spacing-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: all var(--transition-base);
  color: var(--color-text);
}

.nav-prev:hover,
.nav-next:hover {
  border-color: var(--color-primary);
  background-color: var(--color-bg-secondary);
  transform: translateY(-2px);
}

.nav-label {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  font-weight: 600;
  text-transform: uppercase;
}

.nav-title {
  font-size: 1rem;
  font-weight: 600;
}

.nav-next {
  text-align: right;
}

/* ========================================
   Newsletter Section
   ======================================== */

.newsletter-section {
  padding: var(--spacing-2xl) 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  color: white;
}

.newsletter-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.newsletter-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.newsletter-title {
  font-size: 2rem;
  margin-bottom: var(--spacing-sm);
  color: white;
}

.newsletter-description {
  font-size: 1.125rem;
  opacity: 0.95;
  margin: 0;
}

.newsletter-form {
  max-width: 500px;
}

.newsletter-input-wrapper {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.newsletter-input {
  flex: 1;
  padding: 1rem;
  border-radius: var(--radius-md);
  border: 2px solid rgba(255, 255, 255, 0.2);
  background-color: rgba(255, 255, 255, 0.1);
  color: white;
  font-size: 1rem;
  font-family: var(--font-primary);
}

.newsletter-input::placeholder {
  color: rgba(255, 255, 255, 0.7);
}

.newsletter-input:focus {
  outline: none;
  border-color: white;
  background-color: rgba(255, 255, 255, 0.2);
}

.newsletter-button {
  padding: 1rem 1.5rem;
  background-color: white;
  color: var(--color-primary);
  border: none;
  border-radius: var(--radius-md);
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.newsletter-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.newsletter-privacy {
  font-size: 0.875rem;
  opacity: 0.8;
  margin: 0;
}

/* ========================================
   Pages
   ======================================== */

.page-header {
  padding: var(--spacing-2xl) 0 var(--spacing-xl) 0;
  border-bottom: 1px solid var(--color-border);
}

.page-title {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
}

.page-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-light);
  margin: 0;
}

.page-content {
  padding: var(--spacing-xl) 0;
}

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

.site-footer {
  background-color: var(--color-bg-secondary);
  padding: var(--spacing-2xl) 0 var(--spacing-md) 0;
  margin-top: var(--spacing-2xl);
  border-top: 1px solid var(--color-border);
}

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

.footer-about h3 {
  margin-bottom: var(--spacing-md);
}

.footer-about p {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
}

.social-links {
  display: flex;
  gap: var(--spacing-sm);
}

.social-links a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-bg);
  border-radius: var(--radius-md);
  color: var(--color-text-light);
  font-size: 1.25rem;
  transition: all var(--transition-fast);
}

.social-links a:hover {
  background-color: var(--color-primary);
  color: white;
  transform: translateY(-3px);
}

.footer-links h4,
.footer-recent h4,
.footer-newsletter h4 {
  margin-bottom: var(--spacing-md);
  font-size: 1.125rem;
}

.footer-links ul,
.footer-recent ul {
  list-style: none;
}

.footer-links li,
.footer-recent li {
  margin-bottom: var(--spacing-sm);
}

.footer-links a,
.footer-recent a {
  color: var(--color-text-light);
  transition: color var(--transition-fast);
}

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

.footer-newsletter p {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
}

.footer-bottom {
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.footer-bottom a {
  color: var(--color-text-muted);
}

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

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

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.5rem; }
  
  .mobile-menu-toggle {
    display: flex;
  }
  
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 300px;
    height: 100vh;
    background-color: var(--color-bg);
    flex-direction: column;
    padding: var(--spacing-xl) var(--spacing-lg);
    box-shadow: -5px 0 15px var(--color-shadow);
    transition: right var(--transition-base);
  }
  
  .nav-menu.active {
    right: 0;
  }
  
  .nav-links {
    flex-direction: column;
    width: 100%;
  }
  
  .nav-links a {
    display: block;
    padding: var(--spacing-sm) 0;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-description {
    font-size: 1rem;
  }
  
  .posts-grid,
  .posts-list {
    grid-template-columns: 1fr;
  }
  
  .newsletter-wrapper {
    grid-template-columns: 1fr;
  }
  
  .newsletter-input-wrapper {
    flex-direction: column;
  }
  
  .newsletter-button {
    width: 100%;
    justify-content: center;
  }
  
  .post-title {
    font-size: 2rem;
  }
  
  .post-meta {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
}

/* AI Signals Sidebar */
.ai-signals-sidebar {
  background: linear-gradient(135deg, var(--color-primary) 0%, #8b5cf6 100%);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  color: white;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.ai-signals-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid rgba(255, 255, 255, 0.2);
}

.ai-signals-header i {
  font-size: 1.5rem;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.8; transform: scale(1.05); }
}

.ai-signals-header h3 {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 700;
}

.ai-signals-date {
  font-size: 0.85rem;
  opacity: 0.9;
  margin-bottom: 1rem;
  font-weight: 600;
}

.ai-signals-content {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  line-height: 1.8;
}

.ai-signals-content h2 {
  font-size: 1rem;
  margin-top: 1.25rem;
  margin-bottom: 0.75rem;
  color: #a78bfa;
  font-weight: 600;
}

.ai-signals-content h2:first-child {
  margin-top: 0;
}

.ai-signals-content p {
  margin-bottom: 1rem;
}

.ai-signals-content strong {
  color: #c4b5fd;
  font-weight: 600;
}

.ai-signals-content p:last-child {
  margin-bottom: 0;
}

.ai-signals-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: white;
  font-weight: 600;
  text-decoration: none;
  padding: 0.75rem 1.25rem;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.ai-signals-link:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateX(3px);
}

.ai-signals-link i {
  transition: transform var(--transition-base);
}

.ai-signals-link:hover i {
  transform: translateX(3px);
}


@media (max-width: 480px) {
  .container,
  .container-narrow {
    padding: 0 var(--spacing-sm);
  }
  
  .hero {
    padding: var(--spacing-xl) 0;
  }
  
  .section-title {
    font-size: 1.5rem;
  }
  
  .categories-grid {
    grid-template-columns: 1fr;
  }
}

/* Tags */.post-tags {display: flex;gap: 0.5rem;flex-wrap: wrap;margin-bottom: var(--spacing-md);}.tag-badge {display: inline-flex;align-items: center;gap: 0.25rem;padding: 0.25rem 0.75rem;background-color: var(--color-bg-secondary);color: var(--color-text-light);font-size: 0.75rem;font-weight: 500;border-radius: var(--radius-sm);border: 1px solid var(--color-border);}