/* Blog Framework Styles */
:root {
  --blog-primary: #dc2626;
  --blog-secondary: #b91c1c;
  --blog-accent: #0ea5e9;
  --blog-text: #111827;
  --blog-text-muted: #6b7280;
  --blog-bg: #ffffff;
  --blog-bg-secondary: #f9fafb;
  --blog-border: #e5e7eb;
  --blog-border-light: #f3f4f6;
  --blog-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --blog-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --blog-radius: 12px;
  --blog-radius-sm: 8px;
  --blog-font-sans: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --blog-font-serif: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
  --blog-font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

/* Base Styles */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--blog-font-sans);
  line-height: 1.7;
  color: var(--blog-text);
  background: var(--blog-bg);
  margin: 0;
  padding: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.blog-header {
  background: var(--blog-bg);
  border-bottom: 1px solid var(--blog-border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.95);
}

.blog-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo-img {
  height: 40px;
  width: auto;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: var(--blog-text);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

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

/* Main Content */
.blog-main {
  padding: 2rem 0;
}

/* Blog Post */
.blog-post {
  max-width: 800px;
  margin: 0 auto;
}

/* Source Citations */
.source-citation {
  background: var(--blog-bg-secondary);
  border-left: 4px solid var(--blog-accent);
  padding: 1.2rem;
  margin: 2rem 0;
  border-radius: var(--blog-radius-sm);
  box-shadow: var(--blog-shadow);
  transition: all 0.3s ease;
}

.source-citation:hover {
  box-shadow: var(--blog-shadow-lg);
  transform: translateY(-2px);
}

.source-citation p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--blog-text-muted);
  font-style: italic;
}

.source-citation strong {
  color: var(--blog-text);
  font-weight: 600;
}

.source-citation a {
  color: var(--blog-accent);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.source-citation a:hover {
  color: var(--blog-secondary);
  text-decoration: underline;
}

.post-header {
  margin-bottom: 2rem;
}

.post-meta {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin-bottom: 1rem;
}

.category-badge {
  background: var(--blog-primary);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: var(--blog-radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
}

.read-time {
  color: var(--blog-text-muted);
  font-size: 0.875rem;
}

.post-title {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 1.5rem 0;
  color: var(--blog-text);
}

.post-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.author-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.author-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  object-fit: cover;
}

.author-name {
  font-weight: 600;
  color: var(--blog-text);
  display: block;
}

.publish-date {
  color: var(--blog-text-muted);
  font-size: 0.875rem;
  display: block;
}

.share-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--blog-bg-secondary);
  border: 1px solid var(--blog-border);
  padding: 0.5rem 1rem;
  border-radius: var(--blog-radius-sm);
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.875rem;
}

.share-btn:hover {
  background: var(--blog-border-light);
  border-color: var(--blog-text-muted);
}

/* Featured Image */
.featured-image {
  margin: 2rem 0;
  border-radius: var(--blog-radius);
  overflow: hidden;
  box-shadow: var(--blog-shadow);
}

.featured-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* Table of Contents */
.toc {
  background: var(--blog-bg-secondary);
  border: 1px solid var(--blog-border);
  border-radius: var(--blog-radius);
  padding: 1.5rem;
  margin: 2rem 0;
}

.toc h3 {
  margin: 0 0 1rem 0;
  font-size: 1.25rem;
  color: var(--blog-text);
}

.toc ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc li {
  margin-bottom: 0.5rem;
}

.toc a {
  color: var(--blog-text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
  font-size: 0.875rem;
}

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

/* Post Content */
.post-content {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--blog-text);
}

.post-content h2 {
  font-size: 1.75rem;
  font-weight: 600;
  margin: 2.5rem 0 1rem 0;
  color: var(--blog-text);
  scroll-margin-top: 100px;
  position: relative;
  padding-bottom: 0.5rem;
}

.post-content h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--blog-primary);
  border-radius: 1px;
}

.post-content h3 {
  font-size: 1.375rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem 0;
  color: var(--blog-text);
  scroll-margin-top: 100px;
}

.post-content h4 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 1.5rem 0 0.5rem 0;
  color: var(--blog-text);
}

.post-content p {
  margin: 0 0 1.5rem 0;
  text-align: justify;
}

.post-content section {
  margin-bottom: 2rem;
  padding: 1.5rem;
  background: var(--blog-bg);
  border-radius: var(--blog-radius-sm);
  border: 1px solid var(--blog-border-light);
  transition: all 0.3s ease;
}

.post-content section:hover {
  border-color: var(--blog-accent);
  box-shadow: var(--blog-shadow);
}

.post-content ul,
.post-content ol {
  margin: 1.5rem 0;
  padding-left: 1.5rem;
}

.post-content li {
  margin-bottom: 0.5rem;
}

.post-content blockquote {
  border-left: 4px solid var(--blog-primary);
  padding-left: 1.5rem;
  margin: 2rem 0;
  font-style: italic;
  color: var(--blog-text-muted);
  background: var(--blog-bg-secondary);
  padding: 1.5rem;
  border-radius: var(--blog-radius-sm);
}

.post-content code {
  background: var(--blog-bg-secondary);
  padding: 0.125rem 0.25rem;
  border-radius: 4px;
  font-family: var(--blog-font-mono);
  font-size: 0.875em;
}

.post-content pre {
  background: var(--blog-bg-secondary);
  padding: 1.5rem;
  border-radius: var(--blog-radius-sm);
  overflow-x: auto;
  margin: 1.5rem 0;
}

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

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--blog-radius-sm);
  margin: 1.5rem 0;
}

.post-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  border-radius: var(--blog-radius-sm);
  overflow: hidden;
  box-shadow: var(--blog-shadow);
}

.post-content th,
.post-content td {
  padding: 0.75rem;
  text-align: left;
  border-bottom: 1px solid var(--blog-border);
}

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

.post-content a {
  color: var(--blog-primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

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

/* Post Footer */
.post-footer {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--blog-border);
}

.tags {
  margin-bottom: 2rem;
}

.tags h4 {
  margin: 0 0 0.75rem 0;
  font-size: 1rem;
  color: var(--blog-text);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag-list a {
  background: var(--blog-bg-secondary);
  color: var(--blog-text-muted);
  padding: 0.25rem 0.75rem;
  border-radius: var(--blog-radius-sm);
  text-decoration: none;
  font-size: 0.875rem;
  transition: all 0.2s ease;
}

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

.author-bio {
  display: flex;
  gap: 1rem;
  padding: 1.5rem;
  background: var(--blog-bg-secondary);
  border-radius: var(--blog-radius);
}

.author-avatar-large {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.bio-content h4 {
  margin: 0 0 0.5rem 0;
  color: var(--blog-text);
}

.bio-content p {
  margin: 0;
  color: var(--blog-text-muted);
  font-size: 0.875rem;
}

/* Related Posts */
.related-posts {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--blog-border);
}

.related-posts h3 {
  margin: 0 0 1.5rem 0;
  font-size: 1.5rem;
  color: var(--blog-text);
}

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

.post-card {
  background: var(--blog-bg);
  border: 1px solid var(--blog-border);
  border-radius: var(--blog-radius);
  overflow: hidden;
  transition: all 0.2s ease;
  text-decoration: none;
  color: inherit;
}

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

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

.post-card-content {
  padding: 1.5rem;
}

.post-card-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 0.5rem 0;
  color: var(--blog-text);
}

.post-card-excerpt {
  color: var(--blog-text-muted);
  font-size: 0.875rem;
  margin: 0 0 1rem 0;
  line-height: 1.5;
}

.post-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--blog-text-muted);
}

/* Newsletter Signup */
.newsletter-signup {
  margin-top: 4rem;
  padding: 2rem;
  background: linear-gradient(135deg, var(--blog-primary) 0%, var(--blog-secondary) 100%);
  border-radius: var(--blog-radius);
  color: white;
  text-align: center;
}

.newsletter-content h3 {
  margin: 0 0 0.5rem 0;
  font-size: 1.5rem;
}

.newsletter-content p {
  margin: 0 0 1.5rem 0;
  opacity: 0.9;
}

.newsletter-form {
  display: flex;
  gap: 0.5rem;
  max-width: 400px;
  margin: 0 auto;
}

.newsletter-form input {
  flex: 1;
  padding: 0.75rem;
  border: none;
  border-radius: var(--blog-radius-sm);
  font-size: 0.875rem;
}

.newsletter-form button {
  background: white;
  color: var(--blog-primary);
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: var(--blog-radius-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.newsletter-form button:hover {
  background: var(--blog-bg-secondary);
}

/* Footer */
.blog-footer {
  background: var(--blog-bg-secondary);
  border-top: 1px solid var(--blog-border);
  margin-top: 4rem;
  padding: 3rem 0 1rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h4 {
  margin: 0 0 1rem 0;
  color: var(--blog-text);
  font-size: 1.125rem;
}

.footer-section p {
  color: var(--blog-text-muted);
  margin: 0;
  line-height: 1.6;
}

.footer-section ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-section li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: var(--blog-text-muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 0 15px;
  }
  
  .post-title {
    font-size: 2rem;
  }
  
  .post-info {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .nav-links {
    gap: 1rem;
  }
  
  .author-bio {
    flex-direction: column;
    text-align: center;
  }
  
  .newsletter-form {
    flex-direction: column;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .post-title {
    font-size: 1.75rem;
  }
  
  .post-content {
    font-size: 1rem;
  }
  
  .posts-grid {
    grid-template-columns: 1fr;
  }
}

/* Print Styles */
@media print {
  .blog-header,
  .toc,
  .related-posts,
  .newsletter-signup,
  .blog-footer {
    display: none;
  }
  
  .post-content {
    font-size: 12pt;
    line-height: 1.6;
  }
  
  .post-title {
    font-size: 18pt;
  }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
  :root {
    --blog-bg: #1f2937;
    --blog-bg-secondary: #374151;
    --blog-text: #f9fafb;
    --blog-text-muted: #d1d5db;
    --blog-border: #4b5563;
    --blog-border-light: #6b7280;
  }
  
  .blog-header {
    background: rgba(31, 41, 55, 0.95);
  }
  
  .share-btn {
    background: var(--blog-bg-secondary);
    border-color: var(--blog-border);
    color: var(--blog-text);
  }
  
  .share-btn:hover {
    background: var(--blog-border);
  }
  
  .newsletter-form input {
    background: var(--blog-bg-secondary);
    color: var(--blog-text);
  }
}