:root {
  /* Colors */
  --bg: #ffffff;
  --text: #171717;
  --text-muted: #737373;
  --text-accent: #0969da;
  --border: #e5e5e5;
  --nav-bg: rgba(255, 255, 255, 0.8);
  --card-bg: #ffffff;
  --hover-bg: #f5f5f5;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Layout */
  --nav-height: 60px;
  --container-width: 600px;

  /* Typography */
  --font-sans: "Inter var", "Inter", system-ui, sans-serif;
}

[data-theme="dark"] {
  --bg: #0a0a0a;
  --text: #f5f5f5;
  --text-muted: #737373;
  --text-accent: #58a6ff;
  --border: #262626;
  --nav-bg: rgba(10, 10, 10, 0.8);
  --card-bg: #171717;
  --hover-bg: #262626;
}

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

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background-color 0.2s ease, color 0.2s ease;
  font-feature-settings: "cv02", "cv03", "cv04", "cv11";
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  transition: background 0.2s;
}

[data-theme="dark"] .nav {
  background: rgba(10, 10, 10, 0.8);
}

.nav-container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--space-8);
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.875rem;
  padding: var(--space-2) var(--space-3);
  border-radius: 0.375rem;
  transition: all 0.2s ease;
  position: relative;
}

.nav-links a:hover {
  color: var(--text);
  background: rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .nav-links a:hover {
  background: rgba(255, 255, 255, 0.05);
}

.nav-links a.active {
  color: var(--text-accent);
  background: rgba(9, 105, 218, 0.1);
}

[data-theme="dark"] .nav-links a.active {
  background: rgba(88, 166, 255, 0.1);
}

.nav-controls {
  position: absolute;
  right: 0;
  display: flex;
  gap: var(--space-2);
  align-items: center;
}

.theme-toggle {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: var(--space-2);
  border-radius: 0.375rem;
  transition: color 0.2s;
}

.theme-toggle:hover {
  color: var(--text);
}

.mobile-menu-button {
  display: none;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: var(--space-2);
  border-radius: 0.375rem;
  transition: color 0.2s;
}

.mobile-menu-button:hover {
  color: var(--text);
}

.nav-mobile-spacer {
  display: none;
}

/* Main Content */
.main {
  margin-top: var(--nav-height);
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding: 0 var(--space-6);
  min-height: calc(100vh - var(--nav-height) - 200px);
}

/* Page Header */
.page-header {
  padding: var(--space-16) 0 var(--space-12) 0;
  text-align: center;
}

.page-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--space-8);
  letter-spacing: -0.02em;
}

.page-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* Blog Content */
.content {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--space-6) var(--space-4);
  padding-bottom: var(--space-16);
}

/* Improved article content styling */
.article {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-8) 0;
}

.article-content {
  margin-top: var(--space-6);
  line-height: 1.7;
}

/* Blog Index Styles */
.blog-posts {
  display: grid;
  gap: var(--space-6);
  max-width: 800px;
  margin: 0 auto;
}

/* Post Card Styles */
.blog-post {
  display: block;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0;
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.blog-post:hover {
  background: var(--hover-bg);
  border-color: var(--text-accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.post-image {
  width: 100%;
  height: 200px;
  overflow: hidden;
}

.post-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.2s ease;
}

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

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

.post-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
  gap: var(--space-2);
}

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

.post-status {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: 500;
  text-transform: uppercase;
}

.status-published {
  background: #22c55e;
  color: white;
}

.status-draft {
  background: #f59e0b;
  color: white;
}

.post-badge {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: 500;
  text-transform: uppercase;
}

.post-badge.featured {
  background: var(--text-accent);
  color: white;
}

.post-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--space-3);
  line-height: 1.3;
  color: var(--text);
}

.post-description {
  color: var(--text-muted);
  margin-bottom: var(--space-4);
  line-height: 1.6;
}

.post-features {
  list-style: none;
  margin-bottom: var(--space-4);
}

.post-features li {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--space-1);
  padding-left: var(--space-4);
  position: relative;
}

.post-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--text-accent);
  font-weight: bold;
}

.post-meta {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.post-tag {
  background: var(--text-accent);
  color: white;
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 500;
}

.post-contributors {
  display: flex;
  gap: var(--space-2);
}

.contributor {
  background: var(--border);
  color: var(--text-muted);
  padding: 2px 6px;
  border-radius: 8px;
  font-size: 0.75rem;
  font-weight: 500;
}

.post-links {
  display: flex;
  gap: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--border);
}

.post-link-icon {
  font-size: 0.875rem;
  color: var(--text-accent);
  font-weight: 500;
}

/* Article Styles - Updated styling is defined above in .content section */

.article-image {
  width: 100%;
  height: 300px;
  overflow: hidden;
  border-radius: 12px;
  margin-bottom: var(--space-6);
}

.article-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-header {
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--border);
}

.article-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-3);
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: 0.875rem;
  color: var(--text-muted);
}

.article-status {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: 500;
  text-transform: uppercase;
}

.article-badge {
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 12px;
  font-weight: 500;
  text-transform: uppercase;
}

.article-badge.featured {
  background: var(--text-accent);
  color: white;
}

.article-title {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-4);
  color: var(--text);
}

.article-description {
  font-size: 1.125rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

.article-links {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}

.article-link {
  background: var(--text-accent);
  color: white;
  padding: 8px 16px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 500;
  font-size: 0.875rem;
  transition: background 0.2s ease;
}

.article-link:hover {
  background: #0052a3;
}

.article-license {
  background: var(--border);
  color: var(--text-muted);
  padding: 8px 16px;
  border-radius: 8px;
  font-weight: 500;
  font-size: 0.875rem;
}

.article-features {
  background: rgba(0, 102, 204, 0.05);
  padding: var(--space-4);
  border-radius: 8px;
  margin-bottom: var(--space-4);
}

.article-features h3 {
  margin-bottom: var(--space-2);
  color: var(--text);
  font-size: 1rem;
}

.article-features ul {
  list-style: none;
  margin: 0;
}

.article-features li {
  margin-bottom: var(--space-1);
  padding-left: var(--space-4);
  position: relative;
  color: var(--text-muted);
}

.article-features li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--text-accent);
  font-weight: bold;
}

.article-footer-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-4);
  flex-wrap: wrap;
  gap: var(--space-3);
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border);
}

.article-tag {
  background: var(--text-accent);
  color: white;
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 0.875rem;
  font-weight: 500;
}

.article-contributors {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: var(--space-3);
  padding-bottom: var(--space-4);
}

.article-contributor {
  background: var(--border);
  color: var(--text-muted);
  padding: 2px 8px;
  border-radius: 8px;
  font-size: 0.75rem;
  font-weight: 500;
  margin-left: var(--space-1);
}

/* Article Content */
.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.article-content h1 {
  font-size: 2rem;
}
.article-content h2 {
  font-size: 1.75rem;
}
.article-content h3 {
  font-size: 1.5rem;
}
.article-content h4 {
  font-size: 1.25rem;
}

.article-content p {
  margin-bottom: var(--space-4);
  line-height: 1.7;
}

.article-content ul,
.article-content ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

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

.article-content blockquote {
  border-left: 3px solid var(--text-accent);
  padding-left: var(--space-4);
  margin: var(--space-6) 0;
  font-style: italic;
  color: var(--text-muted);
}

.article-content code {
  background: var(--hover-bg);
  padding: var(--space-1) var(--space-2);
  border-radius: 0.25rem;
  font-size: 0.875em;
  font-family: "SF Mono", Consolas, monospace;
}

.article-content pre {
  background: var(--hover-bg);
  padding: var(--space-4);
  border-radius: 0.375rem;
  overflow-x: auto;
  margin: var(--space-6) 0;
}

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

.article-content a {
  color: var(--text-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  border: none;
  transition: none;
}

.article-content a:hover {
  border: none;
}

/* Back Button */
.back-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-muted);
  text-decoration: none;
  margin-bottom: var(--space-8);
  margin-top: var(--space-8);
  transition: color 0.2s ease;
}

.back-button:hover {
  color: var(--text-accent);
}

/* Post Navigation */
.post-navigation {
  display: flex;
  justify-content: space-between;
  gap: var(--space-6);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border);
}

.nav-button {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-6);
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
  transition: all 0.2s ease;
  font-size: 0.9rem;
  max-width: 280px;
  min-height: 60px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.nav-button:hover {
  background: var(--hover-bg);
  border-color: var(--text-accent);
  transform: translateY(-1px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.nav-prev {
  text-align: left;
}

.nav-next {
  text-align: right;
  margin-left: auto;
  flex-direction: row-reverse;
}

.nav-button-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  flex: 1;
  min-width: 0;
}

.nav-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
}

.nav-title {
  font-weight: 500;
  color: var(--text);
  line-height: 1.3;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-arrow {
  font-size: 1.2rem;
  color: var(--text-accent);
  flex-shrink: 0;
}

.post-nav-prev {
  text-align: left;
}

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

.post-nav-direction {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--space-2);
  font-weight: 500;
}

.post-nav-title {
  font-weight: 600;
  line-height: 1.4;
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border);
}

.pagination-btn {
  display: inline-flex;
  align-items: center;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  transition: all 0.2s ease;
  background: var(--card-bg);
}

.pagination-btn:hover {
  background: var(--hover-bg);
  border-color: var(--text-accent);
}

.pagination-btn-disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.pagination-numbers {
  display: flex;
  gap: var(--space-2);
}

.pagination-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  transition: all 0.2s ease;
  background: var(--card-bg);
}

.pagination-number:hover {
  background: var(--hover-bg);
  border-color: var(--text-accent);
}

.pagination-number-active {
  background: var(--text-accent);
  color: var(--bg);
  border-color: var(--text-accent);
}

/* Loading State */
.loading {
  display: flex;
  justify-content: center;
  padding: var(--space-8);
  color: var(--text-muted);
}

/* Error State */
.error-message {
  text-align: center;
  padding: var(--space-8);
}

.error-message h2 {
  margin-bottom: var(--space-4);
  color: var(--text-accent);
}

/* Footer */
.footer {
  text-align: center;
  padding: var(--space-12) 0;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer a {
  color: var(--text-accent);
  text-decoration: none;
}

/* Mobile Styles */
@media (max-width: 768px) {
  .nav-container {
    justify-content: space-between;
    padding: 0 var(--space-4);
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: var(--space-6) 0;
    flex-direction: column;
    gap: var(--space-2);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    z-index: 1000;
  }

  [data-theme="dark"] .nav-links {
    background: rgba(10, 10, 10, 0.95);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3);
  }

  .nav-links.mobile-open {
    display: flex;
  }

  .nav-links a {
    padding: var(--space-3) var(--space-6);
    margin: 0 var(--space-6);
    text-align: center;
    border-radius: 0.5rem;
    font-size: 1rem;
  }

  .nav-links a:hover {
    background: rgba(0, 0, 0, 0.05);
  }

  [data-theme="dark"] .nav-links a:hover {
    background: rgba(255, 255, 255, 0.05);
  }

  .nav-links a.active {
    background: rgba(9, 105, 218, 0.1);
  }

  .mobile-menu-button {
    display: block !important;
  }

  .nav-controls {
    position: static;
    gap: var(--space-2);
  }

  .nav-mobile-spacer {
    display: block;
    width: 60px;
  }

  .main {
    padding: 0 var(--space-4);
  }

  .page-title {
    font-size: 2rem;
  }

  .content {
    padding: var(--space-4) var(--space-3);
  }

  .article {
    padding: var(--space-4) 0;
  }

  .article-title {
    font-size: 2rem;
  }

  .post-navigation {
    flex-direction: column;
    gap: var(--space-4);
  }

  .nav-button {
    max-width: none;
    min-height: 50px;
    padding: var(--space-3) var(--space-4);
  }

  .nav-next {
    margin-left: 0;
    flex-direction: row;
  }

  .nav-next .nav-button-content {
    text-align: left;
  }

  .nav-prev .nav-button-content {
    text-align: left;
  }

  .article-title {
    font-size: 2rem;
  }

  .article-content h1 {
    font-size: 1.75rem;
  }
  .article-content h2 {
    font-size: 1.5rem;
  }
  .article-content h3 {
    font-size: 1.25rem;
  }

  .post-navigation {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .post-nav-next {
    text-align: left;
  }

  .pagination {
    flex-direction: column;
    gap: var(--space-4);
  }

  .pagination-numbers {
    order: -1;
  }

  .pagination-btn {
    width: 100%;
    justify-content: center;
  }
}

/* Animations */
.fade-in {
  animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}