/* =====================================================
   KV-Cache Offloading Architecture - Documentation Styles
   ===================================================== */

/* CSS Variables */
:root {
  /* Background Colors */
  --bg-primary: #0a0e14;
  --bg-secondary: #0d1117;
  --bg-tertiary: #151b24;
  --bg-card: #1a2230;
  --bg-card-hover: #1f2937;
  --bg-code: #161b22;
  
  /* Border Colors */
  --border-primary: #30363d;
  --border-secondary: #21262d;
  --border-highlight: #3a4555;
  
  /* Text Colors */
  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;
  --text-link: #58a6ff;
  
  /* Accent Colors */
  --accent-cyan: #58a6ff;
  --accent-green: #3fb950;
  --accent-orange: #d29922;
  --accent-red: #f85149;
  --accent-purple: #a371f7;
  --accent-blue: #388bfd;
  --accent-yellow: #f0c239;
  --accent-pink: #db61a2;
  --accent-teal: #2dd4bf;
  
  /* Typography */
  --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Fira Code', 'Consolas', monospace;
  --font-display: 'Fraunces', Georgia, serif;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* Layout */
  --max-width: 1100px;
  --nav-height: 64px;
  --sidebar-width: 280px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow: 0.4s ease;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px rgba(88, 166, 255, 0.15);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 1.0625rem;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* =====================================================
   Navigation
   ===================================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(10, 14, 20, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-primary);
  z-index: 1000;
  padding: 0 var(--spacing-xl);
}

.nav-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-brand {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

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

.nav-brand-icon {
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.5rem 0.875rem;
  border-radius: 6px;
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
}

.nav-link.active {
  color: var(--accent-cyan);
  background: rgba(88, 166, 255, 0.1);
}

.nav-chapter-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  opacity: 0.7;
  margin-right: 0.25rem;
}

/* =====================================================
   Layout Containers
   ===================================================== */
.page-wrapper {
  padding-top: var(--nav-height);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-3xl) var(--spacing-xl);
}

.container-wide {
  max-width: 1300px;
  margin: 0 auto;
  padding: var(--spacing-3xl) var(--spacing-xl);
}

.two-column {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
}

.three-column {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

@media (max-width: 900px) {
  .two-column, .three-column {
    grid-template-columns: 1fr;
  }
}

/* =====================================================
   Typography
   ===================================================== */
.chapter-header {
  margin-bottom: var(--spacing-3xl);
  padding-bottom: var(--spacing-2xl);
  border-bottom: 1px solid var(--border-primary);
}

.chapter-label {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent-purple);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: var(--spacing-md);
}

.chapter-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.chapter-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  font-weight: 300;
  max-width: 700px;
}

h2 {
  font-family: var(--font-display);
  font-size: 1.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: var(--spacing-3xl) 0 var(--spacing-lg);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-secondary);
}

h2:first-of-type {
  border-top: none;
  padding-top: 0;
  margin-top: 0;
}

h3 {
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: var(--spacing-2xl) 0 var(--spacing-md);
}

h4 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--accent-cyan);
  margin: var(--spacing-xl) 0 var(--spacing-sm);
}

h5 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin: var(--spacing-lg) 0 var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

strong {
  color: var(--text-primary);
  font-weight: 600;
}

em {
  font-style: italic;
  color: var(--text-primary);
}

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

a:hover {
  text-decoration: underline;
}

/* =====================================================
   Lists
   ===================================================== */
ul, ol {
  margin: var(--spacing-md) 0 var(--spacing-lg);
  padding-left: var(--spacing-xl);
  color: var(--text-secondary);
}

li {
  margin-bottom: var(--spacing-sm);
}

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

/* =====================================================
   Code
   ===================================================== */
code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-code);
  padding: 0.2em 0.5em;
  border-radius: 4px;
  color: var(--accent-cyan);
}

pre {
  background: var(--bg-code);
  border: 1px solid var(--border-primary);
  border-radius: 10px;
  padding: var(--spacing-lg);
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

pre code {
  background: none;
  padding: 0;
  font-size: inherit;
}

/* =====================================================
   Tables
   ===================================================== */
.table-wrapper {
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
  border-radius: 10px;
  border: 1px solid var(--border-primary);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th, td {
  padding: 0.875rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-secondary);
}

th {
  font-weight: 500;
  color: var(--text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--bg-tertiary);
}

td {
  color: var(--text-secondary);
}

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

tr:hover td {
  background: rgba(88, 166, 255, 0.03);
}

.mono {
  font-family: var(--font-mono);
  color: var(--accent-cyan);
}

.highlight {
  color: var(--accent-green);
}

.warning {
  color: var(--accent-orange);
}

.danger {
  color: var(--accent-red);
}

/* =====================================================
   Figures and Diagrams
   ===================================================== */
.figure {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: 16px;
  padding: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
}

.figure-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-purple);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: var(--spacing-lg);
}

.figure-content {
  /* Container for diagram content */
}

.figure-caption {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-secondary);
  font-style: italic;
}

/* =====================================================
   Equations
   ===================================================== */
.equation {
  background: var(--bg-code);
  border: 1px solid var(--border-primary);
  border-radius: 10px;
  padding: var(--spacing-lg) var(--spacing-xl);
  margin: var(--spacing-lg) 0;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--text-primary);
  text-align: center;
  overflow-x: auto;
}

.equation-label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: var(--spacing-sm);
  font-style: italic;
}

/* =====================================================
   Callout Boxes
   ===================================================== */
.callout {
  background: var(--bg-tertiary);
  border-left: 4px solid var(--accent-cyan);
  border-radius: 0 10px 10px 0;
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.callout.insight {
  border-left-color: var(--accent-green);
}

.callout.warning {
  border-left-color: var(--accent-orange);
}

.callout.important {
  border-left-color: var(--accent-red);
}

.callout.definition {
  border-left-color: var(--accent-purple);
}

.callout.note {
  border-left-color: var(--accent-blue);
}

.callout-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

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

/* =====================================================
   Cards
   ===================================================== */
.card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: 12px;
  padding: var(--spacing-lg);
  transition: all var(--transition-normal);
}

.card:hover {
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-glow);
}

.card-header {
  margin-bottom: var(--spacing-md);
}

.card-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.card-subtitle {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* =====================================================
   Statistics
   ===================================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
}

.stat-box {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: 12px;
  padding: var(--spacing-lg);
  text-align: center;
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent-cyan);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: var(--spacing-xs);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* =====================================================
   Bar Charts
   ===================================================== */
.bar-chart {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.bar-row {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.bar-label {
  width: 140px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  text-align: right;
  flex-shrink: 0;
}

.bar-container {
  flex: 1;
  height: 32px;
  background: var(--bg-primary);
  border-radius: 6px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  border-radius: 6px;
  display: flex;
  align-items: center;
  padding-left: 12px;
  font-size: 0.85rem;
  font-weight: 500;
  color: #fff;
  transition: width var(--transition-slow);
}

/* =====================================================
   Memory Bars
   ===================================================== */
.mem-bar {
  display: flex;
  height: 50px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--border-primary);
}

.mem-bar > div {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 500;
  color: #fff;
}

/* =====================================================
   Architecture Flow
   ===================================================== */
.arch-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin: var(--spacing-lg) 0;
}

.arch-box {
  padding: 0.75rem 1.25rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
  min-width: 100px;
  border: 2px solid;
}

.arch-arrow {
  color: var(--text-muted);
  font-size: 1.2rem;
}

/* =====================================================
   Tier Stack
   ===================================================== */
.tier-stack {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.tier-item {
  padding: 1rem 1.25rem;
  border-radius: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 2px solid;
}

/* =====================================================
   Derivation Steps
   ===================================================== */
.derivation {
  background: var(--bg-tertiary);
  border-radius: 12px;
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.derivation-step {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-secondary);
}

.derivation-step:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-purple);
  min-width: 30px;
  font-weight: 600;
}

.step-content {
  flex: 1;
}

.step-eq {
  font-family: var(--font-mono);
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.step-explain {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* =====================================================
   Comparison Boxes
   ===================================================== */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
}

@media (max-width: 700px) {
  .comparison-grid {
    grid-template-columns: 1fr;
  }
}

.comparison-box {
  padding: var(--spacing-lg);
  border-radius: 12px;
  border: 2px solid;
}

.comparison-box.negative {
  background: rgba(248, 81, 73, 0.05);
  border-color: var(--accent-red);
}

.comparison-box.positive {
  background: rgba(63, 185, 80, 0.05);
  border-color: var(--accent-green);
}

.comparison-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

/* =====================================================
   Timeline
   ===================================================== */
.timeline {
  position: relative;
  padding-left: var(--spacing-2xl);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border-primary);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--spacing-xl);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -26px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-cyan);
  border: 2px solid var(--bg-primary);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-purple);
  margin-bottom: var(--spacing-xs);
}

/* =====================================================
   TOC (Table of Contents)
   ===================================================== */
.toc {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: 12px;
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.toc-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-sm);
}

.toc-list a {
  display: flex;
  align-items: center;
  padding: 0.625rem 0.875rem;
  border-radius: 6px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  font-size: 0.95rem;
}

.toc-list a:hover {
  background: rgba(88, 166, 255, 0.1);
  color: var(--accent-cyan);
}

.toc-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-purple);
  margin-right: 0.75rem;
  min-width: 2rem;
}

/* =====================================================
   Navigation Buttons
   ===================================================== */
.chapter-nav {
  display: flex;
  justify-content: space-between;
  margin-top: var(--spacing-3xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border-primary);
  gap: var(--spacing-lg);
}

.chapter-nav-btn {
  display: flex;
  flex-direction: column;
  padding: var(--spacing-lg);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-primary);
  border-radius: 10px;
  text-decoration: none;
  transition: all var(--transition-normal);
  min-width: 200px;
  max-width: 45%;
}

.chapter-nav-btn:hover {
  border-color: var(--accent-cyan);
  background: var(--bg-card-hover);
  text-decoration: none;
}

.chapter-nav-btn.prev {
  align-items: flex-start;
}

.chapter-nav-btn.next {
  align-items: flex-end;
  margin-left: auto;
}

.chapter-nav-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-xs);
}

.chapter-nav-title {
  font-weight: 600;
  color: var(--accent-cyan);
}

/* =====================================================
   Footer
   ===================================================== */
.footer {
  text-align: center;
  padding: var(--spacing-2xl);
  color: var(--text-muted);
  font-size: 0.875rem;
  border-top: 1px solid var(--border-primary);
  margin-top: var(--spacing-3xl);
}

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

/* =====================================================
   Utility Classes
   ===================================================== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-cyan { color: var(--accent-cyan); }
.text-green { color: var(--accent-green); }
.text-orange { color: var(--accent-orange); }
.text-red { color: var(--accent-red); }
.text-purple { color: var(--accent-purple); }

.bg-cyan { background-color: rgba(88, 166, 255, 0.15); }
.bg-green { background-color: rgba(63, 185, 80, 0.15); }
.bg-orange { background-color: rgba(210, 153, 34, 0.15); }
.bg-red { background-color: rgba(248, 81, 73, 0.15); }
.bg-purple { background-color: rgba(163, 113, 247, 0.15); }

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.hidden { display: none; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }

/* =====================================================
   Print Styles
   ===================================================== */
@media print {
  .nav, .chapter-nav {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .container {
    padding-top: 0;
  }
}

/* =====================================================
   Responsive Adjustments
   ===================================================== */
@media (max-width: 768px) {
  :root {
    --nav-height: 56px;
  }
  
  .nav-links {
    display: none;
  }
  
  .container {
    padding: var(--spacing-xl) var(--spacing-md);
  }
  
  .chapter-title {
    font-size: 1.75rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .chapter-nav {
    flex-direction: column;
  }
  
  .chapter-nav-btn {
    max-width: 100%;
  }
}

/* ============================================
   WATERMARK AND COPYRIGHT STYLES
   ============================================ */

.watermark {
  position: fixed;
  bottom: 20px;
  right: 20px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: rgba(88, 166, 255, 0.15);
  pointer-events: none;
  z-index: 9999;
  text-align: right;
  line-height: 1.4;
  user-select: none;
}

.watermark::before {
  content: "CONFIDENTIAL";
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 4px;
  margin-bottom: 0.25rem;
}

/* Diagonal watermark across page */
body::before {
  content: "CONFIDENTIAL • © 2025 SUBRAMANIYAM (SAM) POONI • PROPRIETARY";
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-45deg);
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 700;
  color: rgba(88, 166, 255, 0.03);
  white-space: nowrap;
  pointer-events: none;
  z-index: 0;
  letter-spacing: 8px;
  user-select: none;
}

/* Copyright notice styling */
.footer .copyright-notice {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-primary);
}

@media print {
  .watermark {
    position: fixed;
    color: rgba(0, 0, 0, 0.1);
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }
  
  body::before {
    color: rgba(0, 0, 0, 0.05);
    print-color-adjust: exact;
    -webkit-print-color-adjust: exact;
  }
}

/* ============================================
   FIGURE EMBED STYLES
   ============================================ */

.figure-embed {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: 12px;
  margin: 2rem 0;
  overflow: hidden;
}

.figure-embed-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 1.5rem;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-primary);
}

.figure-embed-label {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent-cyan);
}

.figure-embed-link {
  font-size: 0.85rem;
  color: var(--accent-purple);
  text-decoration: none;
}

.figure-embed-link:hover {
  text-decoration: underline;
}

.figure-embed iframe {
  width: 100%;
  height: 500px;
  border: none;
  background: #fff;
}

.figure-embed.tall iframe {
  height: 700px;
}

.figure-embed.short iframe {
  height: 350px;
}

.comparison-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.bar-chart {
  margin: 1.5rem 0;
}

.bar-row {
  display: flex;
  align-items: center;
  margin-bottom: 0.75rem;
}

.bar-label {
  width: 140px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  flex-shrink: 0;
}

.bar-container {
  flex: 1;
  height: 32px;
  background: var(--bg-tertiary);
  border-radius: 6px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  display: flex;
  align-items: center;
  padding-left: 1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #fff;
  white-space: nowrap;
}

.derivation {
  background: var(--bg-tertiary);
  border-radius: 12px;
  padding: 1.5rem;
  margin: 1.5rem 0;
}

.derivation-step {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-purple);
  min-width: 80px;
}

.step-eq {
  font-family: var(--font-mono);
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}