/* =============================================================================
   XyTech Design System - Phantom-Inspired Dark Cyberpunk
   ============================================================================= */

/* -----------------------------------------------------------------------------
   1. Design Tokens (CSS Variables)
   ----------------------------------------------------------------------------- */
:root {
  /* Backgrounds - Ultra-dark with subtle blue undertones */
  --bg-void: #08080c;
  --bg-base: #0a0a0f;
  --bg-elevated: #0f0f16;
  --bg-surface: #14141c;

  /* Text - High contrast for readability */
  --text-primary: #e8e8f0;
  --text-secondary: #a0a0b8;
  --text-muted: #6b6b80;

  /* Accents - Neon glow palette */
  --accent-primary: #00ff9f;
  --accent-secondary: #00d4ff;
  --accent-tertiary: #ff00ff;

  /* Glows - Transparent versions for effects */
  --glow-primary: rgba(0, 255, 159, 0.3);
  --glow-secondary: rgba(0, 212, 255, 0.3);
  --glow-tertiary: rgba(255, 0, 255, 0.2);

  /* Borders */
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-default: rgba(255, 255, 255, 0.1);

  /* Typography */
  --font-display: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', ui-monospace, monospace;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 4rem;

  /* Layout */
  --max-width: 52rem;
  --content-padding: 2.5rem;
  --header-height: 4rem;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

/* -----------------------------------------------------------------------------
   2. Reset & Base Styles
   ----------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  line-height: 1.6;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-void);
  color: var(--text-secondary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* Subtle grid background pattern */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(0, 255, 159, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 255, 159, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: -1;
}

/* Gradient orbs for visual interest */
body::after {
  content: '';
  position: fixed;
  top: -50%;
  right: -20%;
  width: 80%;
  height: 80%;
  background: radial-gradient(ellipse at center, rgba(0, 255, 159, 0.04) 0%, transparent 60%);
  pointer-events: none;
  z-index: -1;
}

::selection {
  background: var(--accent-primary);
  color: var(--bg-void);
}

/* -----------------------------------------------------------------------------
   3. Typography
   ----------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--text-primary);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

p {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

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

a:hover {
  color: var(--accent-primary);
  text-shadow: 0 0 8px var(--glow-primary);
}

/* -----------------------------------------------------------------------------
   4. Layout (Header, Main, Footer)
   ----------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
  padding: var(--spacing-md) var(--spacing-lg);
  height: var(--header-height);
}

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

.nav-brand {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: text-shadow var(--transition-fast);
}

.nav-brand:hover {
  text-shadow: 0 0 20px var(--glow-primary);
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav-links a {
  position: relative;
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding-bottom: 4px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-primary);
  box-shadow: 0 0 8px var(--glow-primary);
  transition: width var(--transition-base);
}

.nav-links a:hover {
  color: var(--accent-primary);
  text-shadow: none;
}

.nav-links a:hover::after {
  width: 100%;
}

.main {
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--content-padding);
  width: 100%;
}

.site-footer {
  position: relative;
  padding: var(--spacing-lg);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(100%, var(--max-width));
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-primary), var(--accent-secondary), transparent);
  opacity: 0.5;
}

/* -----------------------------------------------------------------------------
   5. Hero Section
   ----------------------------------------------------------------------------- */
.hero {
  text-align: center;
  padding: var(--spacing-xl) 0;
  padding-top: calc(var(--spacing-xl) + 2rem);
}

.hero-title {
  font-size: 3rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: var(--spacing-md);
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 36rem;
  margin: 0 auto;
}

/* -----------------------------------------------------------------------------
   6. Section Titles
   ----------------------------------------------------------------------------- */
.section-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
}

.section-prefix {
  font-family: var(--font-mono);
  color: var(--accent-secondary);
  font-weight: 400;
}

/* -----------------------------------------------------------------------------
   7. Post List & Cards
   ----------------------------------------------------------------------------- */
.recent-posts,
.posts-page {
  margin-top: var(--spacing-xl);
}

.recent-posts h2,
.posts-page h1 {
  margin-bottom: var(--spacing-lg);
}

.post-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.post-item article {
  position: relative;
  padding: var(--spacing-lg);
  padding-left: calc(var(--spacing-lg) + 4px);
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
}

.post-item article::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--accent-primary);
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  opacity: 0.6;
  transition: opacity var(--transition-fast), box-shadow var(--transition-fast);
}

.post-item article:hover {
  border-color: var(--border-default);
  box-shadow: 0 4px 24px rgba(0, 255, 159, 0.08), 0 0 0 1px rgba(0, 255, 159, 0.1);
  transform: translateY(-2px);
}

.post-item article:hover::before {
  opacity: 1;
  box-shadow: 0 0 16px var(--glow-primary);
}

.post-item h2,
.post-item h3 {
  margin-bottom: var(--spacing-sm);
}

.post-item h2 a,
.post-item h3 a {
  color: var(--text-primary);
}

.post-item h2 a:hover,
.post-item h3 a:hover {
  color: var(--accent-primary);
}

.post-item p {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-top: var(--spacing-sm);
}

.post-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: var(--spacing-xs);
}

.post-meta::before {
  content: '>';
  color: var(--accent-secondary);
  margin-right: -0.25rem;
}

.post-meta time,
.post-meta .reading-time {
  color: var(--text-muted);
}

/* -----------------------------------------------------------------------------
   8. Tags
   ----------------------------------------------------------------------------- */
.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: lowercase;
  letter-spacing: 0.02em;
  color: var(--accent-secondary);
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.2);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 999px;
  transition: all var(--transition-fast);
}

.tag::before {
  content: '#';
  opacity: 0.6;
}

.tag:hover {
  background: rgba(0, 212, 255, 0.15);
  border-color: rgba(0, 212, 255, 0.4);
  box-shadow: 0 0 12px var(--glow-secondary);
}

/* -----------------------------------------------------------------------------
   9. Single Post / Article
   ----------------------------------------------------------------------------- */
.post {
  max-width: var(--max-width);
}

.post-header {
  margin-bottom: var(--spacing-xl);
}

.post-header h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.post-content {
  line-height: 1.8;
}

.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
  position: relative;
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-md);
}

.post-content h1::before,
.post-content h2::before,
.post-content h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.2em;
  bottom: 0.2em;
  width: 3px;
  background: var(--accent-primary);
  border-radius: 2px;
}

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

.post-content p {
  margin-bottom: var(--spacing-md);
  font-size: 1.125rem;
}

.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 li::marker {
  color: var(--accent-primary);
}

.post-content blockquote {
  position: relative;
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--bg-elevated);
  border-left: 4px solid var(--accent-secondary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.1);
}

.post-content blockquote p {
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 0;
}

.post-content hr {
  border: none;
  height: 1px;
  margin: var(--spacing-xl) 0;
  background: linear-gradient(90deg, transparent, var(--accent-primary), var(--accent-secondary), transparent);
  opacity: 0.5;
}

.post-content a {
  text-decoration: underline;
  text-decoration-color: rgba(0, 255, 159, 0.4);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--transition-fast);
}

.post-content a:hover {
  text-decoration-color: var(--accent-primary);
}

.post-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: var(--spacing-lg) 0;
  border: 1px solid var(--border-subtle);
}

/* -----------------------------------------------------------------------------
   10. Code Blocks
   ----------------------------------------------------------------------------- */
.post-content code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--bg-surface);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  color: var(--accent-secondary);
}

.post-content pre {
  position: relative;
  margin: var(--spacing-lg) 0;
  padding: 0;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
}

/* Terminal-style header bar */
.post-content pre::before {
  content: '';
  display: block;
  padding: 0.75rem 1rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  background-image: radial-gradient(circle at 0.75rem center, #ff5f57 0.375rem, transparent 0.375rem),
                    radial-gradient(circle at 1.75rem center, #febc2e 0.375rem, transparent 0.375rem),
                    radial-gradient(circle at 2.75rem center, #28c840 0.375rem, transparent 0.375rem);
  background-repeat: no-repeat;
  background-position: left center;
}

.post-content pre code {
  display: block;
  padding: var(--spacing-md);
  background: transparent;
  border: none;
  border-radius: 0;
  font-size: 0;  /* Collapse whitespace text nodes between .line spans */
  line-height: 1.5;
  overflow-x: auto;
}

/* Shiki line-based syntax highlighting */
.post-content pre code .line {
  display: block;
  font-size: 0.875rem;  /* Reset font-size for actual content */
  min-height: 1.5em;
}

/* Empty lines should still take up space */
.post-content pre code .line:empty::before {
  content: ' ';
}

/* Scrollbar styling for code blocks */
.post-content pre code::-webkit-scrollbar {
  height: 8px;
}

.post-content pre code::-webkit-scrollbar-track {
  background: var(--bg-surface);
  border-radius: 4px;
}

.post-content pre code::-webkit-scrollbar-thumb {
  background: var(--border-default);
  border-radius: 4px;
}

.post-content pre code::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Copy button for code blocks */
.post-content pre {
  position: relative;
}

.copy-btn {
  position: absolute;
  top: 0.5rem;
  right: 0.75rem;
  width: 2rem;
  height: 2rem;
  padding: 0.375rem;
  background: transparent;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  cursor: pointer;
  opacity: 0;
  transition: all var(--transition-fast);
  z-index: 10;
}

.copy-btn svg {
  width: 100%;
  height: 100%;
}

.post-content pre:hover .copy-btn {
  opacity: 1;
}

.copy-btn:hover {
  color: var(--accent-secondary);
  border-color: var(--accent-secondary);
  background: rgba(0, 212, 255, 0.1);
  box-shadow: 0 0 12px var(--glow-secondary);
}

.copy-btn:active {
  transform: scale(0.95);
}

.copy-btn.copied {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  background: rgba(0, 255, 159, 0.1);
  box-shadow: 0 0 12px var(--glow-primary);
  opacity: 1;
}

/* -----------------------------------------------------------------------------
   11. Table of Contents
   ----------------------------------------------------------------------------- */
.toc {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.toc-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.toc-title .section-prefix {
  font-family: var(--font-mono);
  color: var(--accent-secondary);
  font-weight: 400;
}

.toc ul {
  list-style: none;
}

.toc li {
  margin: var(--spacing-xs) 0;
}

.toc li a {
  display: inline-block;
  color: var(--text-muted);
  font-size: 0.875rem;
  padding: var(--spacing-xs) 0;
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.toc li a:hover {
  color: var(--accent-primary);
  transform: translateX(4px);
  text-shadow: none;
}

.toc-level-2 {
  margin-left: var(--spacing-md);
}

.toc-level-3 {
  margin-left: var(--spacing-lg);
}

/* Wide screen: Floating sidebar TOC */
@media (min-width: 1440px) {
  .toc {
    position: fixed;
    top: calc(var(--header-height) + var(--spacing-lg));
    right: calc(50% + var(--max-width) / 2 + var(--spacing-lg));
    width: 16rem;
    max-height: calc(100vh - var(--header-height) - var(--spacing-xl));
    overflow-y: auto;
    margin-bottom: 0;
    background: rgba(15, 15, 22, 0.95);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-color: rgba(0, 212, 255, 0.15);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3), 0 0 1px rgba(0, 212, 255, 0.2);
    z-index: 50;
  }

  /* Scrollbar for TOC */
  .toc::-webkit-scrollbar {
    width: 4px;
  }

  .toc::-webkit-scrollbar-track {
    background: transparent;
  }

  .toc::-webkit-scrollbar-thumb {
    background: var(--border-default);
    border-radius: 2px;
  }

  /* Truncate long TOC items */
  .toc li a {
    display: block;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  /* Show full text on hover */
  .toc li a:hover {
    white-space: normal;
    overflow: visible;
    background: var(--bg-surface);
    padding: var(--spacing-xs) var(--spacing-sm);
    margin: calc(-1 * var(--spacing-xs)) calc(-1 * var(--spacing-sm));
    border-radius: var(--radius-sm);
    position: relative;
    z-index: 1;
  }

  /* Visual indentation for nested levels */
  .toc .toc-level-2 {
    margin-left: 0.75rem;
  }

  .toc .toc-level-3 {
    margin-left: 1.5rem;
  }

  .toc .toc-level-3 a::before {
    content: '—';
    color: var(--text-muted);
    margin-right: 0.5rem;
    opacity: 0.5;
  }
}

/* -----------------------------------------------------------------------------
   12. Post Footer
   ----------------------------------------------------------------------------- */
.post-footer {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-subtle);
}

.post-footer a {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.post-footer a:hover {
  color: var(--accent-primary);
  transform: translateX(-4px);
  text-shadow: none;
}

/* -----------------------------------------------------------------------------
   13. View All Link
   ----------------------------------------------------------------------------- */
.recent-posts > p a,
.view-all-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--accent-primary);
  margin-top: var(--spacing-lg);
}

.recent-posts > p a:hover,
.view-all-link:hover {
  text-shadow: 0 0 12px var(--glow-primary);
}

/* -----------------------------------------------------------------------------
   14. Animations
   ----------------------------------------------------------------------------- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Optional: Apply to main content */
.main > * {
  animation: fadeInUp 0.4s ease-out;
}

/* -----------------------------------------------------------------------------
   15. Responsive
   ----------------------------------------------------------------------------- */
@media (max-width: 640px) {
  :root {
    --spacing-lg: 1.5rem;
    --spacing-xl: 2.5rem;
  }

  .nav {
    flex-direction: column;
    gap: var(--spacing-md);
    height: auto;
  }

  .site-header {
    height: auto;
    padding: var(--spacing-md);
  }

  .nav-links {
    gap: var(--spacing-md);
  }

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

  .hero-subtitle {
    font-size: 1rem;
  }

  .post-header h1 {
    font-size: 2rem;
  }

  .post-content h1 { font-size: 1.5rem; }
  .post-content h2 { font-size: 1.25rem; }
  .post-content h3 { font-size: 1.125rem; }

  .post-content p {
    font-size: 1rem;
  }

  .post-item article {
    padding: var(--spacing-md);
    padding-left: calc(var(--spacing-md) + 4px);
  }

  /* Reduce glow effects on mobile for performance */
  .post-item article:hover {
    box-shadow: none;
    transform: none;
  }

  .post-item article:hover::before {
    box-shadow: none;
  }
}

/* -----------------------------------------------------------------------------
   16. Tag Filter Bar
   ----------------------------------------------------------------------------- */
.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-subtle);
}

.filter-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: lowercase;
  letter-spacing: 0.02em;
  color: var(--text-muted);
  background: transparent;
  border: 1px solid var(--border-subtle);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 999px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-tag:hover {
  color: var(--accent-secondary);
  border-color: rgba(0, 212, 255, 0.4);
  background: rgba(0, 212, 255, 0.08);
}

.filter-tag.active {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  background: rgba(0, 255, 159, 0.1);
  box-shadow: 0 0 8px var(--glow-primary);
}

.filter-more {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  padding: var(--spacing-xs) var(--spacing-sm);
  display: flex;
  align-items: center;
}

.filter-more:hover {
  color: var(--accent-secondary);
  text-shadow: none;
}

.no-posts-message {
  text-align: center;
  color: var(--text-muted);
  font-style: italic;
  padding: var(--spacing-xl) 0;
}

/* -----------------------------------------------------------------------------
   17. Tags Page & Tag Cloud
   ----------------------------------------------------------------------------- */
.tags-page {
  margin-top: var(--spacing-lg);
}

.tags-summary {
  margin-top: var(--spacing-lg);
  color: var(--text-muted);
  font-size: 0.875rem;
  text-align: center;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
  padding: var(--spacing-lg) 0;
}

.tag-cloud-item {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-family: var(--font-mono);
  font-size: calc(0.875rem * var(--tag-scale, 1));
  color: var(--accent-secondary);
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.2);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.tag-cloud-item:hover {
  background: rgba(0, 212, 255, 0.15);
  border-color: rgba(0, 212, 255, 0.4);
  box-shadow: 0 0 16px var(--glow-secondary);
  transform: translateY(-2px);
  text-shadow: none;
}

.tag-cloud-item .tag-name::before {
  content: '#';
  opacity: 0.6;
}

.tag-cloud-item .tag-count {
  font-size: 0.7em;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.1);
  padding: 0.1em 0.4em;
  border-radius: 999px;
}

/* -----------------------------------------------------------------------------
   18. Individual Tag Page
   ----------------------------------------------------------------------------- */
.tag-page {
  margin-top: var(--spacing-lg);
}

.tag-page-header {
  margin-bottom: var(--spacing-xl);
}

.tag-page-header .back-link {
  display: inline-block;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-md);
  transition: color var(--transition-fast), transform var(--transition-fast);
}

.tag-page-header .back-link:hover {
  color: var(--accent-primary);
  transform: translateX(-4px);
  text-shadow: none;
}

.tag-page-header .section-title {
  margin-bottom: var(--spacing-sm);
}

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

/* -----------------------------------------------------------------------------
   19. Print Styles
   ----------------------------------------------------------------------------- */
@media print {
  :root {
    --bg-void: #fff;
    --bg-base: #fff;
    --bg-elevated: #f5f5f5;
    --text-primary: #000;
    --text-secondary: #333;
    --accent-primary: #000;
  }

  .site-header,
  .site-footer,
  .toc,
  .tag-filter {
    display: none;
  }

  .post-content a {
    text-decoration: underline;
    color: inherit;
  }
}