/* Onyx Theme - Modern Brutalist Design with Bento Grid & Glassmorphism */

/* ===== CSS RESET & BASE ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* Modern Typography Stack */
  --font-display: 'JetBrains Mono', 'Space Grotesk', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
  
  /* Nature-Inspired Color Palette - Light Theme */
  --color-bg-primary: #fefefe;
  --color-bg-secondary: #f8faf9;
  --color-bg-glass: rgba(255, 255, 255, 0.7);
  --color-bg-glass-strong: rgba(255, 255, 255, 0.9);
  --color-text-primary: #1a1a1a;
  --color-text-secondary: #4a5568;
  --color-text-tertiary: #718096;
  
  /* Vivid Accent Colors */
  --color-accent-primary: #ff6b6b;
  --color-accent-secondary: #4ecdc4;
  --color-accent-tertiary: #45b7d1;
  --color-accent-warning: #feca57;
  --color-accent-success: #48cae4;
  
  /* Nature Colors */
  --color-nature-moss: #8fbc8f;
  --color-nature-sky: #87ceeb;
  --color-nature-earth: #deb887;
  --color-nature-sunset: #ff7f50;
  
  /* Brutalist Borders & Effects */
  --border-brutal: 4px solid var(--color-text-primary);
  --border-accent: 3px solid var(--color-accent-primary);
  --shadow-brutal: 8px 8px 0px var(--color-text-primary);
  --shadow-glass: 0 8px 32px rgba(31, 38, 135, 0.37);
  --shadow-floating: 0 15px 35px rgba(0, 0, 0, 0.1);
  
  /* Spacing - Asymmetric System */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 5rem;
  --space-3xl: 8rem;
  
  /* Layout */
  --container-max: 1400px;
  --content-max: 900px;
  --border-radius: 16px;
  --border-radius-lg: 24px;
  --navbar-height: 80px;
  
  /* Transitions */
  --transition-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme */
[data-theme="dark"] {
  --color-bg-primary: #0f0f0f;
  --color-bg-secondary: #1a1a1a;
  --color-bg-glass: rgba(0, 0, 0, 0.7);
  --color-bg-glass-strong: rgba(0, 0, 0, 0.9);
  --color-text-primary: #ffffff;
  --color-text-secondary: #a0aec0;
  --color-text-tertiary: #718096;
  --border-brutal: 4px solid var(--color-text-primary);
  --shadow-brutal: 8px 8px 0px var(--color-accent-primary);
}

/* ===== BASE STYLES ===== */
html {
  font-size: clamp(16px, 2vw, 20px);
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-primary);
  background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
  min-height: 100vh;
  transition: all 0.3s var(--transition-smooth);
}

/* ===== BRUTALIST TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  color: var(--color-text-primary);
  position: relative;
}

h1 { 
  font-size: clamp(2.5rem, 6vw, 5rem);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  letter-spacing: -0.03em;
}

h1:first-child {
  margin-top: 0;
}

h2 { 
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.025em;
}

h3 { 
  font-size: clamp(1.25rem, 3vw, 1.875rem);
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
  letter-spacing: -0.02em;
}

h4 {
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  margin-top: var(--space-lg);
  margin-bottom: var(--space-xs);
  letter-spacing: -0.015em;
}

h5, h6 {
  font-size: clamp(1rem, 2vw, 1.25rem);
  margin-top: var(--space-md);
  margin-bottom: var(--space-xs);
  letter-spacing: -0.01em;
}

/* Floating accent elements */
h1::before {
  content: '';
  position: absolute;
  top: -10px;
  right: -20px;
  width: 30px;
  height: 30px;
  background: var(--color-accent-primary);
  border-radius: 50%;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(180deg); }
}

p {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
  letter-spacing: 0.01em;
}

/* ===== LAYOUT CONTAINER ===== */
.layout-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
  position: relative;
}

/* ===== GLASSMORPHIC NAVIGATION ===== */
.top-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: 0;
  box-shadow: var(--shadow-glass);
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100vw;
  margin-left: calc(-50vw + 50%);
}

.site-title {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2.5vw, 1.875rem);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: -0.015em;
  color: var(--color-text-primary);
  text-decoration: none;
  position: relative;
  transition: all 0.3s var(--transition-bounce);
}

.site-title:hover {
  transform: scale(1.05) rotate(-2deg);
  color: var(--color-accent-primary);
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

/* ===== BRUTALIST BUTTONS ===== */
.theme-toggle, .hamburger-menu {
  background: var(--color-bg-primary);
  border: var(--border-brutal);
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 0.9rem;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.2s var(--transition-bounce);
  position: relative;
  color: var(--color-text-primary); /* ensure readable text in dark mode */
  appearance: none;
  -webkit-appearance: none;
}

.theme-toggle:hover, .hamburger-menu:hover {
  transform: translate(-4px, -4px);
  box-shadow: var(--shadow-brutal);
  background: var(--color-accent-primary);
  color: var(--color-bg-primary);
}

.hamburger-menu {
  display: none;
}

/* Mobile menu should be hidden by default */
.mobile-menu {
  display: none;
  position: fixed;
  top: calc(var(--navbar-height, 80px) + var(--space-sm));
  left: 0;
  right: 0;
  background: var(--color-bg-glass-strong);
  backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow: var(--shadow-floating);
  z-index: 1002; /* above sticky nav (1000) */
  padding: max(env(safe-area-inset-top), var(--space-md)) var(--space-lg) var(--space-md);
}

.mobile-page-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.mobile-page-links li {
  list-style: none;
  margin-bottom: var(--space-xs);
}

.mobile-page-links a {
  display: block;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-primary);
  border: 2px solid var(--color-text-primary);
  border-radius: var(--border-radius);
  color: var(--color-text-primary);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.8rem;
}

@media (max-width: 1200px) {
  .hamburger-menu {
    display: block;
  }
  .toc-toggle {
    display: block; /* match hamburger visibility */
  }
  /* Only show dropdown on mobile when toggled */
  .mobile-menu.show {
    display: block;
  }
}

/* ===== BENTO GRID SIDEBAR ===== */
.sidebar {
  position: fixed;
  left: 0;
  top: var(--navbar-height, 80px); /* Stick directly to navbar */
  bottom: 0;
  width: 280px;
  background: var(--color-bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  border-right: 1px solid rgba(255, 255, 255, 0.18);
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  padding: var(--space-xl);
  padding-top: calc(var(--space-xl) + var(--space-md)); /* Extra top padding to clear navbar */
  box-shadow: var(--shadow-floating);
  z-index: 100;
  overflow-y: auto;
}

.sidebar-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 900;
  text-transform: uppercase;
  margin-bottom: var(--space-lg);
  color: var(--color-accent-primary);
}

.page-links {
  list-style: none;
  padding: 0;
}

.page-links li {
  margin-bottom: var(--space-sm);
}

.page-links a {
  display: block;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-bg-primary);
  border: 2px solid var(--color-text-primary);
  border-radius: var(--border-radius);
  color: var(--color-text-primary);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.8rem;
  line-height: 1.25;
  letter-spacing: -0.01em;
  transition: all 0.3s var(--transition-bounce);
  word-wrap: break-word;
  overflow-wrap: break-word;
  hyphens: auto;
}

.page-links a:hover {
  transform: translate(-3px, -3px);
  box-shadow: 6px 6px 0px var(--color-accent-secondary);
  background: var(--color-accent-secondary);
  color: var(--color-bg-primary);
}

/* ===== TABLE OF CONTENTS ===== */
.toc-sidebar {
  position: fixed;
  top: var(--navbar-height, 80px); /* Stick directly to navbar */
  right: 0;
  bottom: 0;
  width: 260px;
  background: var(--color-bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  border-left: 1px solid rgba(255, 255, 255, 0.18);
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  padding: var(--space-lg);
  padding-top: calc(var(--space-lg) + var(--space-md)); /* Extra top padding to clear navbar */
  box-shadow: var(--shadow-floating);
  z-index: 99;
  overflow-y: auto;
}

.toc h2 {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-sm);
  color: var(--color-accent-primary);
  border-bottom: 2px solid var(--color-accent-primary);
  padding-bottom: var(--space-xs);
}

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

.toc li {
  margin-bottom: var(--space-xs);
  list-style: none;
}

.toc a {
  display: block;
  padding: var(--space-xs) var(--space-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.005em;
  border-radius: var(--border-radius);
  transition: all 0.2s var(--transition-smooth);
  border-left: 3px solid transparent;
}

.toc a:hover {
  background: var(--color-bg-glass-strong);
  color: var(--color-text-primary);
  border-left-color: var(--color-accent-secondary);
  transform: translateX(3px);
}

/* Nested TOC items */
.toc ul ul {
  margin-left: var(--space-md);
  margin-top: var(--space-xs);
}

.toc ul ul a {
  font-size: 0.75rem;
  color: var(--color-text-tertiary);
}

/* Layout adjustment for pages with TOC */
.has-toc .main-content {
  margin-right: 280px; /* Add right margin when TOC is present */
}

/* ===== MAIN CONTENT AREA ===== */
.main-content {
  margin-left: 300px;
  margin-top: 0;
  padding: var(--space-2xl) 0;
  min-height: calc(100vh - var(--navbar-height));
}

/* ===== HERO SECTION (INDEX) ===== */
.index .main-content {
  margin-left: 0;
  padding: 0;
}

.index header {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
  margin-bottom: var(--space-3xl);
  background: linear-gradient(135deg, var(--color-nature-sky), var(--color-nature-moss));
  border: var(--border-brutal);
  border-radius: var(--border-radius-lg);
  position: relative;
  overflow: hidden;
}

.index header::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, var(--color-accent-primary) 20%, transparent 70%);
  opacity: 0.3;
  animation: rotate 20s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.index header h1 {
  position: relative;
  z-index: 2;
  color: var(--color-bg-primary);
  text-shadow: 4px 4px 0px var(--color-text-primary);
  margin-bottom: var(--space-md);
}

/* ===== BENTO GRID POST LAYOUT ===== */
.post-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  grid-auto-rows: minmax(300px, auto);
  gap: var(--space-xl);
  list-style: none;
  padding: 0;
  margin: 0;
}

/* Asymmetric Bento Layout */
.post-item:nth-child(1) { grid-row: span 2; }
.post-item:nth-child(4) { grid-row: span 2; }
.post-item:nth-child(7) { grid-column: span 2; }

.post-card {
  background: var(--color-bg-glass-strong);
  backdrop-filter: blur(20px) saturate(180%);
  border: var(--border-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--space-xl);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
  overflow: hidden;
  transition: all 0.4s var(--transition-bounce);
  box-shadow: var(--shadow-floating);
}

.post-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-secondary), var(--color-accent-tertiary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--transition-smooth);
}

.post-card:hover::before {
  transform: scaleX(1);
}

.post-card:hover {
  transform: translateY(-10px) rotate(1deg);
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
  border-color: var(--color-accent-primary);
}

.post-card-header {
  margin-bottom: var(--space-lg);
}

.post-title {
  font-family: var(--font-display);
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  font-weight: 900;
  text-transform: uppercase;
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin-bottom: var(--space-sm);
  color: var(--color-text-primary);
}

.post-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-accent-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: auto;
  padding-top: var(--space-lg);
}

.tag {
  background: var(--color-accent-primary);
  color: var(--color-bg-primary);
  padding: var(--space-xs) var(--space-md);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 2px solid var(--color-accent-primary);
  transition: all 0.2s var(--transition-smooth);
}

.tag:hover {
  background: transparent;
  color: var(--color-accent-primary);
  transform: scale(1.05);
}

/* ===== ARTICLE LAYOUTS ===== */
.post-article, .page-article {
  max-width: var(--content-max);
  margin: 0 auto;
  background: var(--color-bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  border: var(--border-brutal);
  border-radius: var(--border-radius-lg);
  padding: var(--space-2xl) var(--space-xl); /* reduce horizontal padding on desktop */
  box-shadow: var(--shadow-floating);
  position: relative;
}

.post-header, .page-header {
  text-align: center;
  padding-bottom: var(--space-2xl);
  margin-bottom: var(--space-2xl);
  border-bottom: var(--border-accent);
  position: relative;
}

.post-article .post-title, 
.page-article .page-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: var(--space-md);
  letter-spacing: -0.025em;
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
  font-family: var(--font-mono);
  font-size: 0.9rem;
  text-transform: uppercase;
}

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

.breadcrumb-separator {
  color: var(--color-text-tertiary);
  font-weight: 900;
}

/* ===== CONTENT STYLING ===== */
.post-content, .page-content {
  font-size: 1rem;
  line-height: 1.65;
}

.post-content h2, .page-content h2 {
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
  padding-left: var(--space-sm);
  border-left: 4px solid var(--color-accent-primary);
}

.post-content h3, .page-content h3,
.post-content h4, .page-content h4,
.post-content h5, .page-content h5,
.post-content h6, .page-content h6 {
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
}

.post-content img, .page-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  border: var(--border-brutal);
  box-shadow: var(--shadow-floating);
  margin: var(--space-2xl) 0;
}

/* Tables */
.post-content table,
.page-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-lg) 0;
  font-size: 0.95rem;
}

.post-content th,
.post-content td,
.page-content th,
.page-content td {
  border: 1px solid rgba(0, 0, 0, 0.15);
  padding: 0.6rem 0.75rem;
  text-align: left;
}

[data-theme="dark"] .post-content th,
[data-theme="dark"] .post-content td,
[data-theme="dark"] .page-content th,
[data-theme="dark"] .page-content td {
  border-color: rgba(255, 255, 255, 0.2);
}

.post-content th,
.page-content th {
  background: var(--color-bg-glass-strong);
  font-weight: 800;
}

code {
  font-family: var(--font-mono);
  background: var(--color-accent-primary);
  color: var(--color-bg-primary);
  padding: 0.2em 0.4em;
  border-radius: 4px;
  font-weight: 700;
}

pre {
  background: var(--color-text-primary);
  color: var(--color-bg-primary);
  padding: var(--space-lg);
  border-radius: var(--border-radius);
  border: var(--border-accent);
  overflow-x: auto;
  margin: var(--space-xl) 0;
}

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

blockquote {
  border-left: 8px solid var(--color-accent-secondary);
  background: var(--color-bg-glass);
  padding: var(--space-lg) var(--space-xl);
  margin: var(--space-xl) 0;
  border-radius: 0 var(--border-radius) var(--border-radius) 0;
  font-style: italic;
  position: relative;
}

blockquote::before {
  content: '"';
  font-size: 4rem;
  color: var(--color-accent-secondary);
  position: absolute;
  top: -10px;
  left: var(--space-md);
  line-height: 1;
}

/* ===== LIST STYLING ===== */
.post-content ul, 
.page-content ul,
.post-content ol, 
.page-content ol {
  margin: var(--space-md) 0;
  padding-left: 0; /* Let li handle indentation so bullets sit at content edge */
  list-style-position: inside; /* Marker aligned with content left edge */
}

/* Lists inside post/page content use native markers aligned to content edge */

.post-content ul li,
.post-content ol li,
.page-content ul li,
.page-content ol li {
  margin-bottom: var(--space-xs);
  position: relative;
  padding-left: var(--space-lg); /* indent text to the right of marker */
  text-indent: calc(-1 * var(--space-lg)); /* keep marker at content left edge */
}

/* Indentation for list items */

.post-content ul li::before,
.page-content ul li::before {
  content: none;
}

.post-article .post-content li::before,
.page-article .page-content li::before {
  content: none;
}

.post-article li::before,
.page-article li::before {
  content: none;
}

.post-content ol,
.page-content ol {
  list-style-type: decimal;
}

/* Explicitly reset ordered list counters at each level */
.post-content ol,
.page-content ol {
  counter-reset: list-item;
}

.post-content ol ol,
.page-content ol ol {
  counter-reset: list-item;
}

/* Fallback for lists rendered directly under article */
.main-content article ol {
  counter-reset: list-item;
}
.main-content article ol ol {
  counter-reset: list-item;
}

/* Native markers styling */
.post-content li::marker,
.page-content li::marker {
  color: var(--color-accent-primary);
  font-weight: 900;
  font-family: var(--font-display);
}

.post-article li::marker,
.page-article li::marker {
  color: var(--color-accent-primary);
  font-weight: 900;
  font-family: var(--font-display);
}

.post-content ol li::marker,
.page-content ol li::marker {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* (Removed duplicate article marker rules) */

/* Nested lists */
.post-content ul ul,
.post-content ol ol,
.post-content ul ol,
.post-content ol ul,
.page-content ul ul,
.page-content ol ol,
.page-content ul ol,
.page-content ol ul {
  margin: var(--space-xs) 0;
  margin-left: var(--space-lg); /* indent nested lists */
}

/* Task list alignment: remove custom marker when checkbox is present */
.post-content li:has(> input[type="checkbox"]),
.page-content li:has(> input[type="checkbox"]) {
  text-indent: 0;
  padding-left: 1.6em;
  list-style: none; /* remove native marker next to checkbox */
}

.post-content li:has(> input[type="checkbox"])::before,
.page-content li:has(> input[type="checkbox"])::before {
  content: none;
}

.post-content li > input[type="checkbox"],
.page-content li > input[type="checkbox"] {
  margin-right: var(--space-xs);
  transform: translateY(1px);
}

.post-content ul ul li::before,
.page-content ul ul li::before {
  content: none;
}

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

/* ===== LIST STYLING FALLBACKS (stronger selectors) ===== */
/* Ensure Onyx list styles apply even if wrappers differ */
.main-content article ul,
.main-content article ol {
  margin: var(--space-md) 0;
  padding-left: 0;
  list-style-position: inside;
}

.main-content article li {
  padding-left: var(--space-lg);
  text-indent: calc(-1 * var(--space-lg));
}

.main-content article li::marker {
  color: var(--color-accent-primary);
  font-weight: 900;
  font-family: var(--font-display);
}

.main-content article ol li::marker {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ===== HEADER CONTROLS STYLING ===== */
.language-selector {
  position: relative;
  display: inline-block;
}

.language-selector select {
  background: var(--color-bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  border: var(--border-brutal);
  border-radius: var(--border-radius);
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  color: var(--color-text-primary);
  cursor: pointer;
  transition: all 0.3s var(--transition-bounce);
  appearance: none;
  min-width: 80px;
  box-shadow: var(--shadow-floating);
  position: relative;
}

.language-selector select:hover {
  transform: translate(-3px, -3px);
  box-shadow: 6px 6px 0px var(--color-accent-secondary);
  background: var(--color-accent-secondary);
  color: var(--color-bg-primary);
  border-color: var(--color-accent-secondary);
}

.language-selector select:focus {
  outline: none;
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0px var(--color-accent-primary);
  background: var(--color-accent-primary);
  color: var(--color-bg-primary);
  border-color: var(--color-accent-primary);
}

/* Custom dropdown arrow */
.language-selector::after {
  content: '▼';
  position: absolute;
  top: 50%;
  right: var(--space-sm);
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 900;
  color: var(--color-text-primary);
  pointer-events: none;
  transition: all 0.3s var(--transition-bounce);
}

.language-selector:hover::after {
  color: var(--color-bg-primary);
  transform: translateY(-50%) rotate(180deg);
}

.language-selector select:focus + .language-selector::after {
  transform: translateY(-50%) rotate(180deg);
}

/* PDF Download Button */
.pdf-download {
  background: var(--color-bg-glass);
  backdrop-filter: blur(20px) saturate(180%);
  border: var(--border-accent);
  border-radius: var(--border-radius);
  padding: var(--space-sm) var(--space-md);
  text-decoration: none;
  color: var(--color-text-primary);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 0.9rem;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  cursor: pointer;
  transition: all 0.3s var(--transition-bounce);
  box-shadow: var(--shadow-floating);
  position: relative;
  overflow: hidden;
}

.pdf-download::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: left 0.5s var(--transition-smooth);
}

.pdf-download:hover::before {
  left: 100%;
}

.pdf-download:hover {
  transform: translate(-4px, -4px);
  box-shadow: 8px 8px 0px var(--color-accent-warning);
  background: var(--color-accent-warning);
  color: var(--color-bg-primary);
  border-color: var(--color-accent-warning);
  text-decoration: none;
}

.pdf-icon {
  font-size: 1.2rem;
  display: inline-block;
  transition: transform 0.3s var(--transition-bounce);
}

.pdf-download:hover .pdf-icon {
  transform: rotate(12deg) scale(1.2);
}

/* Enhanced nav controls layout */
.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.toc-toggle {
  display: none; /* hidden by default on wide screens */
  background: var(--color-bg-primary);
  border: var(--border-brutal);
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 0.9rem;
  text-transform: uppercase;
  cursor: pointer;
  transition: all 0.2s var(--transition-bounce);
  color: var(--color-text-primary); /* ensure readable text in dark mode */
  appearance: none;
  -webkit-appearance: none;
}

.toc-toggle:hover {
  transform: translate(-4px, -4px);
  box-shadow: var(--shadow-brutal);
  background: var(--color-accent-secondary);
  color: var(--color-bg-primary);
}

@media (max-width: 1200px) {
  .toc-toggle {
    display: inline-block; /* show TOC toggle on tablets/phones */
  }
}

/* Language pills */
.lang-switch {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  list-style: none;
  padding: 0;
  margin: 0;
}

.lang-pill {
  display: inline-block;
  padding: 0.25rem 0.6rem;
  border: 2px solid var(--color-text-primary);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-decoration: none;
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  transition: all 0.2s var(--transition-bounce);
}

.lang-pill:hover {
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0px var(--color-accent-secondary);
}

.lang-pill.is-active {
  background: var(--color-accent-primary);
  color: var(--color-bg-primary);
  border-color: var(--color-accent-primary);
}

@media (max-width: 768px) {
  .nav-controls {
    gap: var(--space-sm);
  }
  
  .language-selector select {
    font-size: 0.75rem;
    padding: var(--space-xs) var(--space-sm);
    min-width: 60px;
  }
  
  .pdf-download {
    padding: var(--space-xs) var(--space-sm);
    font-size: 0.8rem;
  }
  
  .pdf-icon {
    font-size: 1rem;
  }
}

/* ===== FLOATING ELEMENTS ===== */
.scroll-to-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 60px;
  height: 60px;
  background: var(--color-accent-primary);
  border: var(--border-brutal);
  border-radius: 50%;
  color: var(--color-bg-primary);
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 900;
  cursor: pointer;
  opacity: 0;
  transform: translateY(100px) rotate(45deg);
  transition: all 0.4s var(--transition-bounce);
  z-index: 1000;
}

.scroll-to-top.visible {
  opacity: 1;
  transform: translateY(0) rotate(0deg);
}

.scroll-to-top:hover {
  transform: translateY(-5px) rotate(-10deg) scale(1.1);
  box-shadow: var(--shadow-brutal);
}

/* ===== MOBILE RESPONSIVE ===== */
@media (max-width: 1200px) {
  .sidebar {
    display: none;
  }
  
  .main-content {
    margin-left: 0;
  }
  
  /* Hide TOC panel by default on smaller screens; shown via toggle */
  .toc-sidebar {
    display: none;
  }
  .toc-sidebar.show {
    display: block;
    position: fixed;
    top: calc(var(--navbar-height, 80px) + var(--space-sm));
    right: 0;
    left: auto;
    bottom: 0;
    width: min(90vw, 320px);
    background: var(--color-bg-glass);
    backdrop-filter: blur(20px) saturate(180%);
    border-left: 1px solid rgba(255, 255, 255, 0.18);
    box-shadow: var(--shadow-floating);
    z-index: 1002;
    padding: var(--space-lg);
  }
  .has-toc .main-content { margin-right: 0; }
}

@media (max-width: 768px) {
  .layout-container {
    padding: 0 var(--space-sm);
  }
  
  .post-list {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .post-item:nth-child(odd) {
    grid-row: span 1;
    grid-column: span 1;
  }
  
  .post-article, .page-article {
    padding: var(--space-lg);
  }
  
  h1 {
    font-size: clamp(2rem, 8vw, 4rem);
  }
}

@media (max-width: 480px) {
  .top-nav {
    padding: var(--space-md);
    border-radius: 0;
  }
  
  .post-card {
    padding: var(--space-lg);
  }
}

/* ===== THEME ANIMATIONS ===== */
@media (prefers-reduced-motion: no-preference) {
  * {
    transition-duration: 0.3s;
  }
  
  .post-card:nth-child(even) {
    animation: slideInFromRight 0.6s ease-out;
  }
  
  .post-card:nth-child(odd) {
    animation: slideInFromLeft 0.6s ease-out;
  }
}

@keyframes slideInFromLeft {
  0% {
    transform: translateX(-100px) translateY(50px) rotate(-5deg);
    opacity: 0;
  }
  100% {
    transform: translateX(0) translateY(0) rotate(0deg);
    opacity: 1;
  }
}

@keyframes slideInFromRight {
  0% {
    transform: translateX(100px) translateY(50px) rotate(5deg);
    opacity: 0;
  }
  100% {
    transform: translateX(0) translateY(0) rotate(0deg);
    opacity: 1;
  }
}