/* Ceti Editorial Blog Theme - Inspired by Ceti Brand Style */
:root {
  --font-sans: 'Lato', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'DM Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  
  --accent: #1F5C4F;
  --accent-light: #EAF3EF;
  --accent-hover: #16463c;
  --accent-glow: rgba(31, 92, 79, 0.12);
  
  --ink: #1A1A1A;
  --ink-secondary: #4A4A4A;
  --ink-muted: #6B7280;
  
  --surface: #FFFFFF;
  --surface-alt: #F9FAF9;
  --surface-muted: #F3F4F3;
  --border: #E5E7EB;
  --border-light: #F0F2F1;
  
  --tag-bg: #EDF3F0;
  --tag-color: #1F5C4F;
  
  --code-bg: #0F172A;
  --code-ink: #E2E8F0;
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--surface-alt);
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header & Nav */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  z-index: 50;
}

.nav-container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.brand-badge {
  background: var(--accent-light);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.nav-link {
  text-decoration: none;
  color: var(--ink-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.15s ease;
}

.nav-link:hover {
  color: var(--accent);
}

.nav-cta {
  background: var(--accent);
  color: #FFFFFF !important;
  padding: 0.55rem 1.15rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s ease, transform 0.15s ease;
}

.nav-cta:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

/* Layout Containers */
.main-wrapper {
  flex: 1;
  max-width: 1120px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 5rem;
  width: 100%;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  max-width: 820px;
  margin: 0 auto;
}

/* Breadcrumbs */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin-bottom: 1.75rem;
}

.breadcrumbs a {
  color: var(--ink-muted);
  text-decoration: none;
  transition: color 0.15s;
}

.breadcrumbs a:hover {
  color: var(--accent);
}

.breadcrumbs .sep {
  opacity: 0.5;
}

/* Article Header */
.article-header {
  margin-bottom: 2.75rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 2rem;
}

.article-category-badge {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.3rem 0.8rem;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 1rem;
}

.article-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin-bottom: 1.25rem;
}

.article-subtitle {
  font-size: 1.25rem;
  color: var(--ink-secondary);
  line-height: 1.6;
  margin-bottom: 1.75rem;
}

.article-meta-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-size: 0.9rem;
  color: var(--ink-muted);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

/* Prose Content */
.prose {
  font-size: 1.125rem;
  color: var(--ink-secondary);
  line-height: 1.85;
}

.prose p {
  margin-bottom: 1.65rem;
}

.prose h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent);
  margin-top: 3rem;
  margin-bottom: 1rem;
  line-height: 1.3;
  letter-spacing: -0.02em;
  border-bottom: 1px solid var(--border-light);
  padding-bottom: 0.5rem;
}

.prose h3 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ink);
  margin-top: 2.25rem;
  margin-bottom: 0.75rem;
  line-height: 1.4;
}

.prose ul, .prose ol {
  margin-bottom: 1.75rem;
  padding-left: 1.5rem;
}

.prose li {
  margin-bottom: 0.65rem;
}

.prose strong {
  color: var(--ink);
  font-weight: 700;
}

.prose a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: opacity 0.15s;
}

.prose a:hover {
  opacity: 0.8;
}

/* Callout Box */
.callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
  box-shadow: var(--shadow-sm);
}

.callout-title {
  font-weight: 700;
  color: var(--accent);
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.4rem;
}

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

/* Code Blocks */
.code-block {
  position: relative;
  background: var(--code-bg);
  border-radius: var(--radius-md);
  margin: 2rem 0;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1rem;
  background: rgba(255, 255, 255, 0.06);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #94A3B8;
}

.copy-code-btn {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #E2E8F0;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.copy-code-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.4);
}

.code-block pre {
  padding: 1.25rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--code-ink);
}

/* Comparison Table */
.comparison-container {
  margin: 2.5rem 0;
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  background: var(--surface);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.95rem;
}

.comparison-table th, .comparison-table td {
  padding: 1rem 1.15rem;
  border-bottom: 1px solid var(--border);
}

.comparison-table th {
  background: var(--accent);
  color: #FFFFFF;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.comparison-table .highlight-col {
  background: var(--accent-light);
  font-weight: 700;
  color: var(--accent);
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

/* Soft CTA Card */
.soft-cta-box {
  background: linear-gradient(135deg, var(--surface) 0%, var(--accent-light) 100%);
  border: 1px solid rgba(31, 92, 79, 0.2);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  margin: 3.5rem 0 2rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.soft-cta-box h3 {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.soft-cta-box p {
  color: var(--ink-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto 1.5rem;
}

.soft-cta-button {
  display: inline-block;
  background: var(--accent);
  color: #FFFFFF;
  padding: 0.8rem 1.85rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  transition: background 0.15s, transform 0.15s;
}

.soft-cta-button:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
}

/* Author Section */
.author-card {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1.5rem;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin: 3rem 0;
}

.author-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.author-bio h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
}

.author-bio p {
  font-size: 0.9rem;
  color: var(--ink-muted);
  margin: 0;
}

/* Blog Index Grid */
.blog-index-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem;
}

.blog-index-title {
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.blog-index-subtitle {
  font-size: 1.2rem;
  color: var(--ink-secondary);
  line-height: 1.6;
}

.filter-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 2.5rem;
}

.filter-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--ink-secondary);
  padding: 0.5rem 1rem;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.filter-btn:hover, .filter-btn.active {
  background: var(--accent);
  color: #FFFFFF;
  border-color: var(--accent);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2rem;
}

.article-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
  text-decoration: none;
  color: inherit;
}

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

.card-content {
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-category {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
}

.card-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.35;
  margin-bottom: 0.75rem;
}

.card-excerpt {
  font-size: 0.95rem;
  color: var(--ink-muted);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex: 1;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--ink-muted);
  border-top: 1px solid var(--border-light);
  padding-top: 1rem;
}

/* Site Footer */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 3rem 1.5rem;
  margin-top: auto;
  color: var(--ink-muted);
  font-size: 0.9rem;
}

.footer-container {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--ink-muted);
  text-decoration: none;
  transition: color 0.15s;
}

.footer-links a:hover {
  color: var(--accent);
}

/* Responsive */
@media (max-width: 768px) {
  .article-title {
    font-size: 2rem;
  }
  .blog-index-title {
    font-size: 2.2rem;
  }
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .nav-links {
    gap: 1rem;
  }
}