/* ==========================================================================
   Vikram Samal — AI Architecture & Systems Engineering Publication
   Modern Dual-Theme System (Dark & Light), Glassmorphism, Responsive Grid
   ========================================================================== */

:root {
  /* Dark Theme Tokens (Default) */
  --bg-color: #070a11;
  --bg-subtle: #0d121f;
  --surface: #0f172a;
  --surface-card: #111a2e;
  --surface-hover: #17233d;
  --surface-border: #1e293b;
  --border-subtle: rgba(255, 255, 255, 0.08);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --accent-cyan: #38bdf8;
  --accent-cyan-glow: rgba(56, 189, 248, 0.15);
  --accent-purple: #a855f7;
  --accent-amber: #f59e0b;
  --accent-emerald: #10b981;
  --accent-rose: #f43f5e;
  --accent-indigo: #6366f1;
  
  --card-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.5);
  --code-bg: #030712;
}

[data-theme="light"] {
  /* Light Theme Tokens */
  --bg-color: #f8fafc;
  --bg-subtle: #f1f5f9;
  --surface: #ffffff;
  --surface-card: #ffffff;
  --surface-hover: #f8fafc;
  --surface-border: #e2e8f0;
  --border-subtle: #cbd5e1;
  
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-muted: #64748b;
  
  --accent-cyan: #0284c7;
  --accent-cyan-glow: rgba(2, 132, 199, 0.08);
  --accent-purple: #7e22ce;
  --accent-amber: #b45309;
  --accent-emerald: #059669;
  --accent-rose: #e11d48;
  --accent-indigo: #4338ca;
  
  --card-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.06), 0 2px 6px -1px rgba(0, 0, 0, 0.04);
  --code-bg: #0f172a;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.65;
  min-height: 100vh;
  transition: background-color 0.25s ease, color 0.25s ease;
  overflow-x: hidden;
}

/* Reading Progress Bar */
.reading-progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3.5px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple), var(--accent-amber));
  z-index: 1000;
  transition: width 0.08s ease-out;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.header {
  border-bottom: 1px solid var(--surface-border);
  background: rgba(7, 10, 17, 0.85);
  backdrop-filter: blur(16px);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 14px 0;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

[data-theme="light"] .header {
  background: rgba(248, 250, 252, 0.88);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.blog-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}

.brand-avatar {
  font-size: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.brand-info {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--accent-cyan);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  transition: color 0.15s ease;
  padding: 6px 10px;
  border-radius: 6px;
}

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

.theme-toggle-btn {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  color: var(--text-primary);
  padding: 6px 14px;
  border-radius: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.theme-toggle-btn:hover {
  border-color: var(--accent-cyan);
  transform: scale(1.02);
}

/* Hero Section */
.hero-section {
  padding: 64px 0 48px;
  position: relative;
  background: radial-gradient(circle at 50% -20%, var(--accent-cyan-glow), transparent 70%);
  border-bottom: 1px solid var(--surface-border);
}

.hero-container {
  text-align: center;
  max-width: 900px;
}

.hero-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 6px 14px;
  background: rgba(56, 189, 248, 0.1);
  color: var(--accent-cyan);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 30px;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 36px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.stat-card {
  background: var(--surface-card);
  border: 1px solid var(--surface-border);
  padding: 16px 12px;
  border-radius: 12px;
  box-shadow: var(--card-shadow);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.stat-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-cyan);
}

.stat-number {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent-cyan);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  margin-top: 4px;
}

/* Two-Column Layout */
.main {
  padding: 40px 24px 80px;
}

.layout-grid {
  display: grid;
  grid-template-columns: 310px 1fr;
  gap: 40px;
  align-items: start;
}

/* Sidebar */
.sidebar {
  position: relative;
}

.sidebar-sticky {
  position: sticky;
  top: 90px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-section {
  background: var(--surface-card);
  border: 1px solid var(--surface-border);
  border-radius: 14px;
  padding: 18px;
  box-shadow: var(--card-shadow);
}

.sidebar-heading {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Search Box */
.search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.search-box input {
  width: 100%;
  padding: 10px 36px 10px 14px;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 0.875rem;
  outline: none;
  transition: border-color 0.2s ease;
}

.search-box input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px var(--accent-cyan-glow);
}

.search-shortcut {
  position: absolute;
  right: 12px;
  font-size: 0.75rem;
  color: var(--text-muted);
  border: 1px solid var(--surface-border);
  background: var(--surface-hover);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  pointer-events: none;
}

.search-clear-btn {
  position: absolute;
  right: 10px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
}

/* Active Filter Pill Box */
.active-filter-box {
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: 10px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.active-filter-title {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.active-filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.active-tag-pill {
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  color: var(--text-primary);
  padding: 4px 8px;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
}

.active-tag-pill:hover {
  border-color: var(--accent-rose);
  color: var(--accent-rose);
}

.clear-all-btn {
  background: none;
  border: none;
  color: var(--accent-cyan);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  padding: 0;
}

.clear-all-btn:hover {
  text-decoration: underline;
}

/* Filter Buttons */
.filter-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.filter-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: 7px 10px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: all 0.15s ease;
  width: 100%;
  text-align: left;
}

.filter-btn:hover {
  background: var(--surface-hover);
  color: var(--text-primary);
}

.filter-btn.active {
  background: var(--accent-cyan-glow);
  color: var(--accent-cyan);
  font-weight: 700;
}

.filter-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 6px;
}

.dot-all { background: var(--text-muted); }
.dot-reasoning { background: var(--accent-purple); }
.dot-rag { background: var(--accent-cyan); }
.dot-agents { background: var(--accent-emerald); }
.dot-inference { background: var(--accent-amber); }
.dot-safety { background: var(--accent-rose); }
.dot-multimodal { background: #3b82f6; }
.dot-edge { background: #14b8a6; }
.dot-architecture { background: var(--accent-indigo); }

.count-badge {
  font-size: 0.75rem;
  font-weight: 700;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  padding: 2px 7px;
  border-radius: 12px;
  color: var(--text-muted);
}

.filter-btn.active .count-badge {
  background: var(--accent-cyan);
  color: #ffffff;
  border-color: var(--accent-cyan);
}

/* Month List (Scrollable) */
.month-list {
  max-height: 220px;
  overflow-y: auto;
  padding-right: 4px;
}

.month-list::-webkit-scrollbar {
  width: 4px;
}

.month-list::-webkit-scrollbar-thumb {
  background: var(--surface-border);
  border-radius: 4px;
}

/* Posts Stream */
.stream-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--surface-border);
  padding-bottom: 12px;
}

.stream-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stream-count-tag {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-cyan);
  background: var(--accent-cyan-glow);
  padding: 4px 10px;
  border-radius: 12px;
  border: 1px solid rgba(56, 189, 248, 0.2);
}

.posts-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Post Card */
.post-card {
  background: var(--surface-card);
  border: 1px solid var(--surface-border);
  border-radius: 16px;
  padding: 26px;
  box-shadow: var(--card-shadow);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.post-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent-cyan);
  box-shadow: 0 16px 32px -8px rgba(0, 0, 0, 0.4);
}

.post-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.post-meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}

.meta-dot {
  color: var(--surface-border);
}

.post-tags-wrapper {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.post-tag {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  letter-spacing: 0.02em;
}

.tag-reasoning { background: rgba(168, 85, 247, 0.15); color: #c084fc; border: 1px solid rgba(168, 85, 247, 0.3); }
.tag-rag { background: rgba(56, 189, 248, 0.15); color: #38bdf8; border: 1px solid rgba(56, 189, 248, 0.3); }
.tag-agents { background: rgba(16, 185, 129, 0.15); color: #34d399; border: 1px solid rgba(16, 185, 129, 0.3); }
.tag-inference { background: rgba(245, 158, 11, 0.15); color: #fbbf24; border: 1px solid rgba(245, 158, 11, 0.3); }
.tag-safety { background: rgba(244, 63, 94, 0.15); color: #fb7185; border: 1px solid rgba(244, 63, 94, 0.3); }
.tag-multimodal { background: rgba(59, 130, 246, 0.15); color: #60a5fa; border: 1px solid rgba(59, 130, 246, 0.3); }
.tag-edge { background: rgba(20, 184, 166, 0.15); color: #2dd4bf; border: 1px solid rgba(20, 184, 166, 0.3); }
.tag-architecture { background: rgba(99, 102, 241, 0.15); color: #818cf8; border: 1px solid rgba(99, 102, 241, 0.3); }

.post-title {
  font-size: 1.35rem;
  font-weight: 800;
  line-height: 1.3;
}

.post-title a {
  color: var(--text-primary);
  text-decoration: none;
  transition: color 0.15s ease;
}

.post-title a:hover {
  color: var(--accent-cyan);
}

.post-excerpt {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* News Citation Card inside Card */
.post-news-badge {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--surface-border);
  border-left: 3px solid var(--accent-amber);
  border-radius: 8px;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.badge-icon {
  font-size: 1.1rem;
}

.badge-content {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.badge-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-amber);
  letter-spacing: 0.05em;
}

.badge-text {
  font-size: 0.825rem;
  color: var(--text-secondary);
}

.post-card-footer {
  display: flex;
  justify-content: flex-end;
  margin-top: 4px;
}

.read-more-btn {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--accent-cyan);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s ease;
}

.read-more-btn:hover {
  gap: 10px;
}

/* No Results */
.no-results {
  text-align: center;
  padding: 60px 20px;
  background: var(--surface-card);
  border: 1px solid var(--surface-border);
  border-radius: 16px;
}

.no-results-icon {
  font-size: 3rem;
  margin-bottom: 12px;
}

/* Article Single Post View */
.article-container {
  max-width: 860px;
  padding-top: 40px;
}

.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.back-link {
  color: var(--accent-cyan);
  text-decoration: none;
  font-weight: 700;
}

.back-link:hover {
  text-decoration: underline;
}

.article-header {
  margin-bottom: 24px;
}

.article-title {
  font-size: 2.35rem;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.article-meta {
  font-size: 0.875rem;
}

.article-lead {
  font-size: 1.2rem;
  font-family: 'Newsreader', Georgia, serif;
  font-style: italic;
  line-height: 1.6;
  color: var(--accent-cyan);
  padding: 16px 0;
  border-top: 1px solid var(--surface-border);
  border-bottom: 1px solid var(--surface-border);
  margin-bottom: 32px;
}

/* Article Content Elements */
.article-body {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.article-body h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin: 36px 0 16px;
  color: var(--text-primary);
  border-bottom: 1px solid var(--surface-border);
  padding-bottom: 8px;
}

.article-body p {
  margin-bottom: 20px;
  color: var(--text-secondary);
}

/* Takeaway Box */
.takeaway-box {
  background: rgba(56, 189, 248, 0.06);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-left: 4px solid var(--accent-cyan);
  border-radius: 12px;
  padding: 22px 24px;
  margin-bottom: 32px;
}

.takeaway-title {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.takeaway-box ul {
  padding-left: 20px;
  color: var(--text-primary);
}

.takeaway-box li {
  margin-bottom: 8px;
  font-size: 0.95rem;
}

/* Architecture Diagram */
.arch-diagram {
  background: var(--code-bg);
  border: 1px solid var(--surface-border);
  border-radius: 10px;
  padding: 20px;
  overflow-x: auto;
  margin: 20px 0 30px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  color: #38bdf8;
  line-height: 1.45;
}

/* Code Block with Header and Copy */
.code-block-wrapper {
  margin: 24px 0 32px;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--surface-border);
  background: var(--code-bg);
}

.code-header {
  background: #0b111e;
  padding: 8px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--surface-border);
}

.code-lang {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-cyan);
  font-family: 'JetBrains Mono', monospace;
}

.copy-code-btn {
  background: var(--surface-card);
  border: 1px solid var(--surface-border);
  color: var(--text-secondary);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.copy-code-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent-cyan);
}

.code-block-wrapper pre {
  padding: 16px 20px;
  overflow-x: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.875rem;
  color: #e2e8f0;
  line-height: 1.6;
}

/* Benchmark Table */
.table-responsive {
  overflow-x: auto;
  margin: 24px 0 32px;
}

.benchmark-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  background: var(--surface-card);
  border: 1px solid var(--surface-border);
  border-radius: 10px;
  overflow: hidden;
}

.benchmark-table th {
  background: var(--surface);
  color: var(--accent-cyan);
  font-weight: 700;
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--surface-border);
}

.benchmark-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--surface-border);
  color: var(--text-secondary);
}

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

.benchmark-table tr:hover td {
  background: var(--surface-hover);
}

/* Gotchas Box */
.gotchas-box {
  background: rgba(244, 63, 94, 0.06);
  border: 1px solid rgba(244, 63, 94, 0.25);
  border-left: 4px solid var(--accent-rose);
  border-radius: 12px;
  padding: 20px 24px;
  margin: 28px 0;
}

.gotchas-title {
  font-size: 0.875rem;
  font-weight: 800;
  color: var(--accent-rose);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
}

.gotchas-box ul {
  padding-left: 20px;
  color: var(--text-primary);
}

.gotchas-box li {
  margin-bottom: 6px;
  font-size: 0.925rem;
}

/* News Callout Box */
.news-callout {
  background: var(--surface-card);
  border: 1px solid var(--surface-border);
  border-left: 4px solid var(--accent-amber);
  border-radius: 10px;
  padding: 18px 22px;
  margin: 32px 0 40px;
}

.news-title {
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--accent-amber);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
}

.news-callout p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

.news-callout a {
  color: var(--accent-cyan);
  font-weight: 700;
  text-decoration: none;
}

.news-callout a:hover {
  text-decoration: underline;
}

/* Author Card */
.author-card {
  display: flex;
  gap: 18px;
  background: var(--surface-card);
  border: 1px solid var(--surface-border);
  border-radius: 14px;
  padding: 24px;
  margin: 40px 0;
  align-items: center;
}

.author-avatar {
  font-size: 2.2rem;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  flex-shrink: 0;
}

.author-name {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.author-bio {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 8px;
}

.author-socials {
  display: flex;
  gap: 12px;
}

.author-socials a {
  color: var(--accent-cyan);
  font-size: 0.8rem;
  font-weight: 700;
  text-decoration: none;
}

/* Navigation prev / next */
.article-navigation {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid var(--surface-border);
}

.nav-prev, .nav-next {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-next {
  text-align: right;
  align-items: flex-end;
}

.nav-direction {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.nav-post-title {
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 700;
  text-decoration: none;
  line-height: 1.4;
  transition: color 0.15s ease;
}

.nav-post-title:hover {
  color: var(--accent-cyan);
}

/* Footer */
.footer {
  border-top: 1px solid var(--surface-border);
  background: var(--surface);
  padding: 48px 0 24px;
  margin-top: 60px;
}

.footer-container {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 32px;
}

.footer-brand {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.footer-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  max-width: 400px;
}

.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  transition: color 0.15s ease;
}

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

.footer-bottom {
  border-top: 1px solid var(--surface-border);
  padding-top: 20px;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
}

.d-none {
  display: none !important;
}

/* Responsive */
@media (max-width: 960px) {
  .layout-grid {
    grid-template-columns: 1fr;
  }
  .sidebar-sticky {
    position: static;
  }
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-navigation {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .nav-next {
    text-align: left;
    align-items: flex-start;
  }
}