/* ==========================================================================
   CODE AND LIFE - "Past Reimagined" Theme
   70s retro-futuristic aesthetic with Atari-era warmth
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. DESIGN TOKENS (CSS Custom Properties)
   -------------------------------------------------------------------------- */

:root {
  /* Light Mode - Warm Beige / 70s Corporate */
  --color-bg-primary: #F5F0E6;
  --color-bg-secondary: #EBE4D6;
  --color-bg-tertiary: #DED5C4;
  --color-bg-code: #E8E0D0;

  --color-text-primary: #2C2416;
  --color-text-secondary: #5C5040;
  --color-text-muted: #8A7E6A;

  --color-accent-primary: #D35C28;
  --color-accent-secondary: #8B572A;
  --color-accent-tertiary: #C4A35A;
  --color-accent-teal: #2A9D8F;
  --color-accent-teal-hover: #1E7A6E;

  --color-border-strong: #B8A890;
  --color-border-subtle: #D5CBBA;

  --color-link: #D35C28;
  --color-link-hover: #A04520;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(44, 36, 22, 0.08);
  --shadow-md: 0 3px 10px rgba(44, 36, 22, 0.1);
  --shadow-lg: 0 8px 30px rgba(44, 36, 22, 0.12);

  /* Typography */
  --font-sans: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --font-serif: 'Source Serif 4', 'Georgia', serif;
  --font-mono: 'JetBrains Mono', 'Consolas', 'Monaco', monospace;

  /* Fluid type scale */
  --font-size-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --font-size-sm: clamp(0.875rem, 0.82rem + 0.27vw, 1rem);
  --font-size-base: clamp(1rem, 0.93rem + 0.35vw, 1.125rem);
  --font-size-lg: clamp(1.125rem, 1.04rem + 0.43vw, 1.3rem);
  --font-size-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.6rem);
  --font-size-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
  --font-size-3xl: clamp(1.875rem, 1.5rem + 1.875vw, 2.75rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-8: 3rem;
  --space-10: 4rem;

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

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;

  /* Progress bar */
  --progress-gradient: linear-gradient(90deg, #D35C28, #C4A35A);
}

/* Dark Mode - Retro Warm Charcoal */
:root.dark {
  --color-bg-primary: #1A1816;
  --color-bg-secondary: #252220;
  --color-bg-tertiary: #302C28;
  --color-bg-code: #1E1C1A;
  --color-code-bg: #0F1812;
  --color-code-text: #B7F7C0;
  --color-code-border: #24523A;
  --color-code-accent: #3EA86B;
  --color-code-glow: rgba(82, 255, 165, 0.12);

  --color-text-primary: #F0DCC0;
  --color-text-secondary: #C4B39A;
  --color-text-muted: #8A8275;

  --color-accent-primary: #FF9F40;
  --color-accent-secondary: #E08030;
  --color-accent-tertiary: #FFD080;
  --color-accent-teal: #4ECDC4;
  --color-accent-teal-hover: #6DE8DF;

  --color-border-strong: #4A4540;
  --color-border-subtle: #363330;

  --color-link: #FF9F40;
  --color-link-hover: #FFB866;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(255, 159, 64, 0.06);
  --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255, 159, 64, 0.08);
  --shadow-lg: 0 12px 30px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 159, 64, 0.1);

  --progress-gradient: linear-gradient(90deg, #FF9F40, #FFD080);
}

/* System preference detection (when no explicit class) */
@media (prefers-color-scheme: dark) {
  :root:not(.light) {
    --color-bg-primary: #1A1816;
    --color-bg-secondary: #252220;
    --color-bg-tertiary: #302C28;
    --color-bg-code: #1E1C1A;
    --color-code-bg: #0F1812;
    --color-code-text: #B7F7C0;
    --color-code-border: #24523A;
    --color-code-accent: #3EA86B;
    --color-code-glow: rgba(82, 255, 165, 0.12);

    --color-text-primary: #F0DCC0;
    --color-text-secondary: #C4B39A;
    --color-text-muted: #8A8275;

    --color-accent-primary: #FF9F40;
    --color-accent-secondary: #E08030;
    --color-accent-tertiary: #FFD080;
    --color-accent-teal: #4ECDC4;
    --color-accent-teal-hover: #6DE8DF;

    --color-border-strong: #4A4540;
    --color-border-subtle: #363330;

    --color-link: #FF9F40;
    --color-link-hover: #FFB866;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(255, 159, 64, 0.06);
    --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255, 159, 64, 0.08);
    --shadow-lg: 0 12px 30px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 159, 64, 0.1);

    --progress-gradient: linear-gradient(90deg, #FF9F40, #FFD080);
  }
}

/* --------------------------------------------------------------------------
   2. CSS RESET
   -------------------------------------------------------------------------- */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  height: 100%;
}

body {
  min-height: 100%;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

input, button, textarea, select {
  font: inherit;
}

/* --------------------------------------------------------------------------
   3. BASE TYPOGRAPHY
   -------------------------------------------------------------------------- */

body {
  font-family: var(--font-serif);
  font-size: var(--font-size-base);
  line-height: 1.7;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  transition: background-color var(--transition-slow), color var(--transition-slow);
}

/* Subtle warm glow effect for dark mode text */
:root.dark body {
  text-shadow: 0 0 20px rgba(240, 220, 192, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root:not(.light) body {
    text-shadow: 0 0 20px rgba(240, 220, 192, 0.06);
  }
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); margin-top: var(--space-8); }
h3 { font-size: var(--font-size-xl); margin-top: var(--space-6); }
h4 { font-size: var(--font-size-lg); margin-top: var(--space-5); }

p {
  margin-bottom: var(--space-4);
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-link-hover);
  text-decoration: underline;
}

strong, b {
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   4. READING PROGRESS BAR
   -------------------------------------------------------------------------- */

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-bg-secondary);
  z-index: 1000;
}

.reading-progress-bar {
  height: 100%;
  width: 0;
  background: var(--progress-gradient);
  transition: width 80ms ease-out;
}

/* --------------------------------------------------------------------------
   5. LAYOUT SYSTEM
   -------------------------------------------------------------------------- */

.site-container {
  display: grid;
  grid-template-areas:
    "header header"
    "sidebar main"
    "footer footer";
  grid-template-columns: 280px minmax(0, 800px);
  grid-template-rows: auto 1fr auto;
  gap: var(--space-6);
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-6);
  min-height: 100vh;
}

@media (max-width: 960px) {
  .site-container {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: var(--space-5);
    padding: var(--space-4);
  }
}

@media (max-width: 720px) {
  .site-container {
    grid-template-areas:
      "header"
      "main"
      "sidebar"
      "footer";
    grid-template-columns: 1fr;
    gap: var(--space-5);
  }
}

.site-header {
  grid-area: header;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-5) 0;
  border-bottom: 3px solid var(--color-accent-primary);
  position: relative;
}

/* Geometric accent - diagonal stripe */
.site-header::before {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--color-accent-tertiary);
}

.header-content {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex: 1;
}

.header-text {
  flex: 1;
}

/* C & L Chevron Logo */
.logo-mark {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  flex-shrink: 0;
}

.logo-mark .chevron {
  width: 0;
  height: 0;
  transition: transform var(--transition-fast);
}

/* "C" chevron - pointing left */
.logo-mark .chevron-c {
  border-top: 12px solid transparent;
  border-bottom: 12px solid transparent;
  border-right: 14px solid var(--color-accent-primary);
}

/* "L" chevron - pointing bottom-left (rotated) */
.logo-mark .chevron-l {
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  border-right: 12px solid var(--color-accent-teal);
  transform: rotate(45deg);
  margin-bottom: 2px;
}

.site-header:hover .logo-mark .chevron-c {
  transform: translateX(-3px);
}

.site-header:hover .logo-mark .chevron-l {
  transform: rotate(45deg) translate(-2px, 2px);
}

.site-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--space-1);
  letter-spacing: -0.02em;
}

.site-title a {
  color: var(--color-text-primary);
  text-decoration: none;
}

.site-title a:hover {
  color: var(--color-accent-primary);
}

.site-tagline {
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: 400;
  margin: 0;
}

.site-sidebar {
  grid-area: sidebar;
}

.site-main {
  grid-area: main;
  min-width: 0;
}

.site-footer {
  grid-area: footer;
  text-align: center;
  padding: var(--space-6) 0 var(--space-4);
  border-top: 1px solid var(--color-border-subtle);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* --------------------------------------------------------------------------
   6. THEME TOGGLE
   -------------------------------------------------------------------------- */

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--color-bg-secondary);
  border: 2px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  color: var(--color-text-secondary);
}

.theme-toggle:hover {
  background: var(--color-bg-tertiary);
  border-color: var(--color-border-strong);
  color: var(--color-accent-primary);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 2px;
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  width: 20px;
  height: 20px;
}

/* Light mode: show sun */
.theme-toggle .icon-sun { display: block; }
.theme-toggle .icon-moon { display: none; }

/* Dark mode: show moon */
:root.dark .theme-toggle .icon-sun { display: none; }
:root.dark .theme-toggle .icon-moon { display: block; }

@media (prefers-color-scheme: dark) {
  :root:not(.light) .theme-toggle .icon-sun { display: none; }
  :root:not(.light) .theme-toggle .icon-moon { display: block; }
}

/* --------------------------------------------------------------------------
   6b. HEADER SEARCH (Pagefind)
   -------------------------------------------------------------------------- */

.header-search {
  position: relative;
  margin-right: var(--space-4);
  display: flex;
  align-items: center;
}

/* Pagefind UI CSS variable overrides */
.header-search .pagefind-ui {
  --pagefind-ui-scale: 0.65;
  --pagefind-ui-primary: var(--color-accent-primary);
  --pagefind-ui-text: var(--color-text-primary);
  --pagefind-ui-background: var(--color-bg-secondary);
  --pagefind-ui-border: var(--color-border-subtle);
  --pagefind-ui-border-width: 2px;
  --pagefind-ui-border-radius: 8px;
  --pagefind-ui-font: var(--font-sans);
}

/* Force form to not add padding */
.header-search .pagefind-ui__form {
  padding: 0 !important;
  margin: 0 !important;
}

/* Search input - match theme toggle size exactly */
.header-search .pagefind-ui__search-input {
  width: 140px !important;
  height: 44px !important;
  padding: 0 var(--space-3) 0 36px !important;
  background: var(--color-bg-secondary) !important;
  border: 2px solid var(--color-border-subtle) !important;
  border-radius: var(--radius-md) !important;
  font-family: var(--font-sans) !important;
  font-size: var(--font-size-sm) !important;
  color: var(--color-text-primary) !important;
  transition: all var(--transition-fast);
  box-sizing: border-box !important;
}

.header-search .pagefind-ui__search-input:focus {
  outline: none !important;
  border-color: var(--color-accent-primary) !important;
  width: 200px !important;
}

.header-search .pagefind-ui__search-input::placeholder {
  color: var(--color-text-muted) !important;
}

/* Search icon */
.header-search .pagefind-ui__search-icon {
  left: 10px !important;
  color: var(--color-text-muted) !important;
  width: 18px !important;
  height: 18px !important;
}

/* Clear button */
.header-search .pagefind-ui__search-clear {
  right: 8px !important;
  color: var(--color-text-muted) !important;
  background: transparent !important;
  padding: 4px !important;
}

.header-search .pagefind-ui__search-clear:hover {
  color: var(--color-accent-primary) !important;
}

/* Results dropdown */
.header-search .pagefind-ui__drawer {
  position: absolute !important;
  top: calc(100% + var(--space-2)) !important;
  right: 0 !important;
  left: auto !important;
  width: 350px !important;
  max-height: 60vh !important;
  overflow-y: auto !important;
  background: var(--color-bg-secondary) !important;
  border: 2px solid var(--color-border-subtle) !important;
  border-radius: var(--radius-md) !important;
  box-shadow: var(--shadow-lg) !important;
  z-index: 1000 !important;
  padding: 0 !important;
}

.header-search .pagefind-ui__results-area {
  padding: var(--space-2) !important;
  margin: 0 !important;
}

.header-search .pagefind-ui__message {
  font-family: var(--font-sans) !important;
  font-size: var(--font-size-xs) !important;
  color: var(--color-text-muted) !important;
  padding: var(--space-2) var(--space-3) !important;
  margin: 0 !important;
}

/* Individual result */
.header-search .pagefind-ui__result {
  padding: var(--space-3) !important;
  border-bottom: 1px solid var(--color-border-subtle) !important;
  list-style: none !important;
  background: transparent !important;
}

.header-search .pagefind-ui__result:last-child {
  border-bottom: none !important;
}

.header-search .pagefind-ui__result-inner {
  padding: 0 !important;
  margin: 0 !important;
}

.header-search .pagefind-ui__result-link {
  font-family: var(--font-sans) !important;
  font-weight: 500 !important;
  font-size: var(--font-size-sm) !important;
  color: var(--color-text-primary) !important;
  text-decoration: none !important;
}

.header-search .pagefind-ui__result-link:hover {
  color: var(--color-accent-primary) !important;
}

.header-search .pagefind-ui__result-title {
  font-size: var(--font-size-sm) !important;
  margin: 0 0 var(--space-1) 0 !important;
  padding: 0 !important;
}

.header-search .pagefind-ui__result-excerpt {
  font-size: var(--font-size-xs) !important;
  color: var(--color-text-secondary) !important;
  line-height: 1.4 !important;
  margin: 0 !important;
  padding: 0 !important;
}

/* Highlight marks - subtle, not yellow */
.header-search .pagefind-ui__result-excerpt mark,
.header-search mark {
  background: var(--color-accent-primary) !important;
  color: white !important;
  padding: 1px 3px !important;
  border-radius: 2px !important;
}

/* Hide sub-results and thumbnails */
.header-search .pagefind-ui__result-thumb,
.header-search .pagefind-ui__result-image {
  display: none !important;
}

/* Load more button */
.header-search .pagefind-ui__button {
  background: var(--color-bg-tertiary) !important;
  color: var(--color-text-secondary) !important;
  border: 1px solid var(--color-border-subtle) !important;
  border-radius: var(--radius-sm) !important;
  padding: var(--space-2) var(--space-3) !important;
  font-family: var(--font-sans) !important;
  font-size: var(--font-size-xs) !important;
  cursor: pointer !important;
  margin: var(--space-2) !important;
}

.header-search .pagefind-ui__button:hover {
  background: var(--color-bg-secondary) !important;
  border-color: var(--color-accent-primary) !important;
}

/* Mobile: smaller search input */
@media (max-width: 720px) {
  .header-search .pagefind-ui__search-input {
    width: 100px !important;
  }

  .header-search .pagefind-ui__search-input:focus {
    width: 150px !important;
  }

  .header-search .pagefind-ui__drawer {
    width: calc(100vw - var(--space-6)) !important;
    right: calc(-44px - var(--space-4)) !important;
  }
}

/* --------------------------------------------------------------------------
   7. SIDEBAR COMPONENTS
   -------------------------------------------------------------------------- */

.sidebar-box {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin-bottom: var(--space-5);
  border-left: 4px solid var(--color-accent-primary);
  box-shadow: var(--shadow-sm);
}

:root.dark .sidebar-box,
:root.dark .post {
  background: linear-gradient(180deg, rgba(255, 208, 128, 0.03), rgba(0, 0, 0, 0) 45%), var(--color-bg-secondary);
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

:root.dark .post {
  background: linear-gradient(180deg, rgba(255, 208, 128, 0.03), rgba(0, 0, 0, 0) 45%), #1F1D1B;
}

@media (prefers-color-scheme: dark) {
  :root:not(.light) .sidebar-box,
  :root:not(.light) .post {
    background: linear-gradient(180deg, rgba(255, 208, 128, 0.03), rgba(0, 0, 0, 0) 45%), var(--color-bg-secondary);
    box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255, 255, 255, 0.04);
  }

  :root:not(.light) .post {
    background: linear-gradient(180deg, rgba(255, 208, 128, 0.03), rgba(0, 0, 0, 0) 45%), #1F1D1B;
  }
}

.sidebar-box h2 {
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-4) 0;
}

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

.post-list li {
  padding: var(--space-2) 0;
  border-bottom: 1px dashed var(--color-border-subtle);
}

.post-list li:last-child {
  border-bottom: none;
}

.post-list a {
  font-size: var(--font-size-sm);
  line-height: 1.4;
  display: block;
}

/* Contact box */
.contact-box {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  border-left-color: var(--color-accent-secondary);
}

.contact-box a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.contact-box a:hover {
  color: var(--color-accent-primary);
  text-decoration: none;
}

.contact-box svg {
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   8. POST STYLES
   -------------------------------------------------------------------------- */

.post {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-md);
  border-top: 4px solid var(--color-accent-primary);
}

.post-header {
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border-subtle);
}

.post-title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-3);
  line-height: 1.2;
}

.post-title a {
  color: var(--color-text-primary);
}

.post-title a:hover {
  color: var(--color-accent-primary);
  text-decoration: none;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.post-meta-separator {
  color: var(--color-border-strong);
}

.post-date {
  font-weight: 500;
}

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

.post-tag,
a.category {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.post-tag:hover,
a.category:hover {
  background: var(--color-accent-primary);
  color: white;
  text-decoration: none;
}

/* Legacy post-info support */
.post-info {
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border-subtle);
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-5);
}

.post-info p {
  margin: 0;
}

/* --------------------------------------------------------------------------
   9. POST CONTENT
   -------------------------------------------------------------------------- */

.post-content,
.content {
  font-size: var(--font-size-base);
  line-height: 1.75;
}

.post-content h2,
.content h2 {
  margin-top: var(--space-8);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-subtle);
}

.post-content h2:first-child,
.content h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.post-content h3,
.content h3 {
  margin-top: var(--space-6);
}

.post-content img,
.content img {
  border-radius: var(--radius-md);
  margin: var(--space-5) auto;
  box-shadow: var(--shadow-sm);
}

.post-content ul,
.post-content ol,
.content ul,
.content ol {
  margin: var(--space-4) 0;
  padding-left: var(--space-6);
}

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

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

.post-content blockquote,
.content blockquote {
  margin: var(--space-6) 0;
  padding: var(--space-5) var(--space-6);
  padding-left: var(--space-8);
  background: linear-gradient(135deg,
    var(--color-bg-tertiary) 0%,
    var(--color-bg-secondary) 100%);
  border-left: 4px solid var(--color-accent-teal);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  color: var(--color-text-secondary);
  position: relative;
}

.post-content blockquote::before,
.content blockquote::before {
  content: '"';
  position: absolute;
  top: var(--space-2);
  left: var(--space-3);
  font-size: 3rem;
  font-family: var(--font-serif);
  color: var(--color-accent-teal);
  opacity: 0.25;
  line-height: 1;
}

.post-content hr,
.content hr {
  border: none;
  height: 1px;
  background: var(--color-border-subtle);
  margin: var(--space-8) 0;
}

/* Tables */
.post table,
.post-content table,
.content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-5) 0;
  font-size: var(--font-size-sm);
}

.post th,
.post td,
.post-content th,
.post-content td,
.content th,
.content td {
  padding: var(--space-3);
  text-align: left;
  border: 1px solid var(--color-border-subtle);
}

.post th,
.post-content th,
.content th {
  font-family: var(--font-sans);
  font-weight: 600;
  background: var(--color-bg-tertiary);
}

/* Heading anchors */
.heading-anchor {
  opacity: 0;
  margin-left: var(--space-2);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

h2:hover .heading-anchor,
h3:hover .heading-anchor,
.heading-anchor:focus {
  opacity: 1;
}

.heading-anchor:hover {
  color: var(--color-accent-primary);
}

/* --------------------------------------------------------------------------
   10. TABLE OF CONTENTS
   -------------------------------------------------------------------------- */

.toc {
  display: none;
  margin: var(--space-5) 0;
  padding: var(--space-4) var(--space-5);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--color-accent-secondary);
}

.toc.toc-visible {
  display: block;
}

.toc-title {
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-3) 0;
}

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

.toc-item {
  counter-increment: toc-counter;
  margin: var(--space-2) 0;
  font-size: var(--font-size-sm);
}

.toc-item::before {
  content: counter(toc-counter) ".";
  display: inline-block;
  width: 1.5em;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
}

.toc-item-nested {
  margin-left: var(--space-5);
  counter-increment: none;
}

.toc-item-nested::before {
  content: "—";
}

.toc-item a {
  color: var(--color-text-secondary);
}

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

/* --------------------------------------------------------------------------
   10b. RELATED POSTS (End of Article)
   -------------------------------------------------------------------------- */

.related-posts {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
}

.related-posts-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin: 0 0 var(--space-4) 0;
}

.related-posts-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--space-3);
}

.related-posts-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-3);
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-accent-teal);
  transition: border-color var(--transition-fast);
}

.related-posts-item:hover {
  border-left-color: var(--color-accent-primary);
}

.related-posts-item a {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  font-weight: 500;
  line-height: 1.3;
}

.related-posts-item time {
  font-family: var(--font-sans);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* Sidebar related posts - use teal accent for differentiation */
.sidebar-related {
  border-left-color: var(--color-accent-teal);
}

/* --------------------------------------------------------------------------
   11. CODE BLOCKS
   -------------------------------------------------------------------------- */

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

/* Inline code */
:not(pre) > code {
  padding: 0.2em 0.5em;
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  color: var(--color-accent-teal);
  font-weight: 500;
}

/* Code block wrapper */
.code-block-wrapper {
  position: relative;
  margin: var(--space-5) 0;
}

pre {
  padding: var(--space-5);
  margin: var(--space-4) 0;
  background: var(--color-bg-code);
  border: 1px solid var(--color-border-subtle);
  border-left: 4px solid var(--color-accent-primary);
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-size: var(--font-size-sm);
  line-height: 1.6;
}

:root.dark pre {
  background: linear-gradient(180deg, rgba(82, 255, 165, 0.08), rgba(0, 0, 0, 0) 40%), var(--color-code-bg);
  border-color: var(--color-code-border);
  border-left-color: var(--color-code-accent);
  color: var(--color-code-text);
  box-shadow: var(--shadow-sm), inset 0 0 0 1px var(--color-code-glow);
}

:root.dark pre code {
  color: inherit;
}

@media (prefers-color-scheme: dark) {
  :root:not(.light) pre {
    background: linear-gradient(180deg, rgba(82, 255, 165, 0.08), rgba(0, 0, 0, 0) 40%), var(--color-code-bg);
    border-color: var(--color-code-border);
    border-left-color: var(--color-code-accent);
    color: var(--color-code-text);
    box-shadow: var(--shadow-sm), inset 0 0 0 1px var(--color-code-glow);
  }

  :root:not(.light) pre code {
    color: inherit;
  }
}

pre code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
}

/* Shiki syntax highlighting - theme switching with CSS variables */
.shiki {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  overflow-x: auto;
  line-height: 1.6;
}

/* Default to light theme colors */
.shiki span {
  color: var(--shiki-light);
  background-color: var(--shiki-light-bg);
  font-style: var(--shiki-light-font-style);
  font-weight: var(--shiki-light-font-weight);
  text-decoration: var(--shiki-light-text-decoration);
}

.shiki {
  background-color: var(--shiki-light-bg);
  color: var(--shiki-light);
}

/* Dark mode: use dark theme colors */
:root.dark .shiki span {
  color: var(--shiki-dark);
  background-color: var(--shiki-dark-bg);
  font-style: var(--shiki-dark-font-style);
  font-weight: var(--shiki-dark-font-weight);
  text-decoration: var(--shiki-dark-text-decoration);
}

:root.dark .shiki {
  background-color: var(--shiki-dark-bg);
  color: var(--shiki-dark);
}

/* Dark mode preference media query fallback */
@media (prefers-color-scheme: dark) {
  :root:not(.light) .shiki span {
    color: var(--shiki-dark);
    background-color: var(--shiki-dark-bg);
    font-style: var(--shiki-dark-font-style);
    font-weight: var(--shiki-dark-font-weight);
    text-decoration: var(--shiki-dark-text-decoration);
  }

  :root:not(.light) .shiki {
    background-color: var(--shiki-dark-bg);
    color: var(--shiki-dark);
  }
}

/* Copy button */
.copy-code-button {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  cursor: pointer;
  opacity: 0;
  transition: all var(--transition-fast);
}

.code-block-wrapper:hover .copy-code-button {
  opacity: 1;
}

.copy-code-button:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
  border-color: var(--color-border-strong);
}

.copy-code-button .icon-check {
  display: none;
}

.copy-code-button.copied .icon-copy {
  display: none;
}

.copy-code-button.copied .icon-check {
  display: block;
  color: var(--color-accent-secondary);
}

/* --------------------------------------------------------------------------
   12. POST LIST (INDEX PAGE)
   -------------------------------------------------------------------------- */

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

.read-more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: var(--font-size-sm);
  margin-top: var(--space-4);
}

.read-more::after {
  content: '→';
  transition: transform var(--transition-fast);
}

.read-more:hover::after {
  transform: translateX(4px);
}

/* Pagination */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-8);
  font-family: var(--font-sans);
}

.pagination a,
.pagination span {
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
}

.pagination a {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-subtle);
}

.pagination a:hover {
  background: var(--color-accent-primary);
  color: white;
  border-color: var(--color-accent-primary);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   13. ANIMATIONS
   -------------------------------------------------------------------------- */

@keyframes fade-in-up {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.post {
  opacity: 0;
  animation: fade-in-up 0.5s ease-out forwards;
}

.post:nth-child(1) { animation-delay: 0ms; }
.post:nth-child(2) { animation-delay: 80ms; }
.post:nth-child(3) { animation-delay: 160ms; }
.post:nth-child(4) { animation-delay: 240ms; }
.post:nth-child(5) { animation-delay: 320ms; }
.post:nth-child(6) { animation-delay: 400ms; }

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  .post {
    opacity: 1;
    animation: none;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* --------------------------------------------------------------------------
   14. UTILITIES
   -------------------------------------------------------------------------- */

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* --------------------------------------------------------------------------
   15. PRINT STYLES
   -------------------------------------------------------------------------- */

@media print {
  .reading-progress,
  .theme-toggle,
  .site-sidebar,
  .copy-code-button,
  .toc {
    display: none !important;
  }

  .site-container {
    display: block;
    max-width: none;
  }

  .post {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}