/* ==========================================================================
   EXERGY // THERMODYNAMIC EV TELEMETRY DESIGN SYSTEM
   Direction 2: Thermodynamic Sankey & Grassmann Flow
   Drafting grid, zero radius, 1px hairlines, tabular figures, physical sinks
   ========================================================================== */

:root {
  --canvas-dark: #0E1012;
  --surface-dark: #16191D;
  --surface-elevated: #1D2126;
  --surface-active: #22272E;
  --border-hairline: #25292E;
  --border-active: #383E46;
  --border-focus: #FFFFFF;
  --border-subtle: #1C2024;

  --text-primary: #F0F2F5;
  --text-secondary: #8C929A;
  --text-muted: #5A6068;

  /* Thermodynamic Energy Sink Streams */
  --sink-traction: #D0D4D8;
  --sink-climate: #4E79A7;
  --sink-climb: #E19C24;
  --sink-auxiliary: #9B7BB8;
  --sink-standby: #33373B;
  --sink-regen: #59A14F;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Roboto Mono', 'SF Mono', Menlo, Consolas, "Liberation Mono", monospace;

  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;

  --container-max: 1240px;
}

/* Base Reset & Reset Geometry to Strict 0px Radius */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  border-radius: 0 !important;
}

html {
  font-size: 16px;
  background-color: var(--canvas-dark);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.5;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  background-color: var(--canvas-dark);
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
}

/* Browser Surface Styling */
::selection {
  background: var(--sink-climate);
  color: #FFFFFF;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--canvas-dark);
  border-left: 1px solid var(--border-hairline);
}

::-webkit-scrollbar-thumb {
  background: var(--border-active);
  border: 1px solid var(--canvas-dark);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 1px solid var(--border-focus);
  outline-offset: 2px;
}

button {
  font-family: inherit;
  cursor: pointer;
  background: none;
  border: none;
}

/* Engineering Drafting Grid Background */
.drafting-grid-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 800px;
  background-image: 
    linear-gradient(to right, rgba(37, 41, 46, 0.35) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(37, 41, 46, 0.35) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
  mask-image: linear-gradient(to bottom, black 50%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, black 50%, transparent 100%);
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-lg);
  padding-right: var(--spacing-lg);
  position: relative;
  z-index: 1;
}

/* Top Telemetry Ticker Bar */
.telemetry-ticker {
  background: var(--surface-dark);
  border-bottom: 1px solid var(--border-hairline);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  padding: 6px 0;
  position: relative;
  z-index: 50;
}

.telemetry-ticker .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.ticker-left, .ticker-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.status-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  background-color: var(--sink-regen);
  margin-right: 6px;
}

.ticker-tag {
  color: var(--text-muted);
}

.ticker-val {
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

/* Primary Header */
.site-header {
  background: rgba(14, 16, 18, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-hairline);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1px;
  background: var(--border-hairline);
  border: 1px solid var(--border-hairline);
}

.nav-link {
  background: var(--surface-dark);
  padding: 8px 16px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  transition: color 0.15s ease, background 0.15s ease;
}

.nav-link:hover, .nav-link.active {
  background: var(--surface-elevated);
  color: var(--text-primary);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* Hairline Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 10px 20px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--text-primary);
  color: var(--canvas-dark);
  border: 1px solid var(--text-primary);
}

.btn-primary:hover {
  background: #FFFFFF;
  border-color: #FFFFFF;
  box-shadow: 0 0 0 1px #FFFFFF;
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-hairline);
}

.btn-outline:hover {
  background: var(--surface-dark);
  border-color: var(--text-secondary);
}

.btn-sink-regen {
  background: rgba(89, 161, 79, 0.1);
  border: 1px solid var(--sink-regen);
  color: #71BF65;
}

.btn-sink-regen:hover {
  background: rgba(89, 161, 79, 0.2);
}

/* Typography Scale */
h1, h2, h3, h4 {
  font-family: var(--font-sans);
  color: var(--text-primary);
  font-feature-settings: "tnum" 1, "zero" 1;
  font-variant-numeric: tabular-nums;
}

.hero-title {
  font-size: clamp(2.25rem, 5vw, 3.75rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-lg);
  max-width: 820px;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 760px;
  margin-bottom: var(--spacing-xl);
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin-bottom: var(--spacing-md);
}

.section-desc {
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 720px;
  margin-bottom: var(--spacing-2xl);
}

.mono-heading {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* Sections Structure */
section {
  padding: var(--spacing-3xl) 0;
  position: relative;
  border-bottom: 1px solid var(--border-hairline);
}

/* Hero Section */
.hero-section {
  padding-top: var(--spacing-3xl);
  padding-bottom: var(--spacing-3xl);
}

.hero-top-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
}

.badge-hairline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--border-hairline);
  background: var(--surface-dark);
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.badge-hairline.highlight {
  border-color: var(--sink-climate);
  color: #7AA2CF;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-3xl);
}

/* Interactive Grassmann / Sankey Telemetry Console */
.flow-simulator-deck {
  background: var(--surface-dark);
  border: 1px solid var(--border-hairline);
  padding: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.deck-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.deck-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.deck-title h3 {
  font-size: 1.125rem;
  font-weight: 600;
}

.deck-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  background: var(--canvas-dark);
  border: 1px solid var(--border-hairline);
  padding: var(--spacing-md);
}

.control-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.control-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
}

.control-val {
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  background: var(--border-hairline);
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  background: var(--text-primary);
  cursor: pointer;
  border: 1px solid var(--canvas-dark);
}

input[type="range"]::-moz-range-thumb {
  width: 14px;
  height: 14px;
  background: var(--text-primary);
  cursor: pointer;
  border: 1px solid var(--canvas-dark);
}

/* Segmented Switcher for HVAC Mode */
.segmented-mode-switch {
  display: flex;
  border: 1px solid var(--border-hairline);
  background: var(--canvas-dark);
}

.mode-btn {
  flex: 1;
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  text-align: center;
  border-right: 1px solid var(--border-hairline);
  transition: all 0.1s ease;
}

.mode-btn:last-child {
  border-right: none;
}

.mode-btn.active {
  background: var(--surface-elevated);
  color: var(--text-primary);
}

/* SVG Sankey Diagram Canvas */
.flow-svg-container {
  width: 100%;
  background: var(--canvas-dark);
  border: 1px solid var(--border-hairline);
  padding: var(--spacing-lg);
  overflow-x: auto;
}

.flow-svg {
  width: 100%;
  min-width: 720px;
  height: auto;
  display: block;
}

/* Physics Attribution Breakdown Section */
.attribution-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.physics-card {
  background: var(--surface-dark);
  border: 1px solid var(--border-hairline);
  padding: var(--spacing-lg);
  display: flex;
  flex-direction: column;
}

.physics-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 1px solid var(--border-hairline);
}

.sink-indicator {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sink-bar {
  width: 10px;
  height: 10px;
}

.physics-formula {
  background: var(--canvas-dark);
  border: 1px solid var(--border-hairline);
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  padding: var(--spacing-sm) var(--spacing-md);
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.physics-body {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-secondary);
  flex-grow: 1;
}

/* Side-by-Side Comparison Box */
.comparison-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border-hairline);
  border: 1px solid var(--border-hairline);
  margin-top: var(--spacing-2xl);
}

.comparison-col {
  background: var(--surface-dark);
  padding: var(--spacing-xl);
}

.comparison-col.bad {
  border-left: 2px solid var(--text-muted);
}

.comparison-col.good {
  border-left: 2px solid var(--sink-regen);
}

.comparison-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-sm);
}

.comparison-col.bad .comparison-tag {
  color: var(--text-muted);
}

.comparison-col.good .comparison-tag {
  color: var(--sink-regen);
}

.comparison-metric {
  font-size: 2.25rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  margin-bottom: var(--spacing-sm);
}

.comparison-expl {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* Interactive Surface Showcase */
.showcase-deck {
  background: var(--surface-dark);
  border: 1px solid var(--border-hairline);
}

.showcase-tabs {
  display: flex;
  background: var(--border-hairline);
  gap: 1px;
  overflow-x: auto;
  border-bottom: 1px solid var(--border-hairline);
}

.showcase-tab {
  flex: 1;
  min-width: 180px;
  background: var(--surface-dark);
  padding: 16px 20px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-secondary);
  text-align: left;
  transition: all 0.15s ease;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.showcase-tab span.tab-sub {
  font-size: 0.6875rem;
  color: var(--text-muted);
  font-weight: 400;
}

.showcase-tab:hover {
  background: var(--surface-elevated);
  color: var(--text-primary);
}

.showcase-tab.active {
  background: var(--canvas-dark);
  color: var(--text-primary);
  border-bottom: 2px solid var(--border-focus);
}

.showcase-content {
  padding: var(--spacing-xl);
}

.showcase-panel {
  display: none;
  grid-template-columns: 1fr 1.25fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.showcase-panel.active {
  display: grid;
}

.showcase-info h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.showcase-info p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
}

.showcase-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  border-top: 1px solid var(--border-hairline);
  padding-top: var(--spacing-md);
}

.spec-cell {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.spec-cell .key {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.spec-cell .val {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.showcase-media {
  background: var(--canvas-dark);
  border: 1px solid var(--border-hairline);
  position: relative;
  overflow: hidden;
}

.showcase-media img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.media-caption {
  padding: 8px 12px;
  border-top: 1px solid var(--border-hairline);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--text-secondary);
  background: var(--surface-dark);
  display: flex;
  justify-content: space-between;
}

/* Privacy & Data Sovereignty Section */
.sovereignty-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.sovereignty-card {
  background: var(--surface-dark);
  border: 1px solid var(--border-hairline);
  padding: var(--spacing-lg);
}

.sovereignty-card h4 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.sovereignty-card p {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.crypto-diagram {
  background: var(--canvas-dark);
  border: 1px solid var(--border-hairline);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  line-height: 1.4;
  color: var(--text-secondary);
  overflow-x: auto;
  white-space: pre;
}

/* Vehicle Compatibility Matrix */
.compat-table-container {
  border: 1px solid var(--border-hairline);
  background: var(--surface-dark);
  overflow-x: auto;
}

.compat-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
}

.compat-table th {
  background: var(--canvas-dark);
  border-bottom: 1px solid var(--border-hairline);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 12px 16px;
  color: var(--text-secondary);
}

.compat-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-hairline);
  color: var(--text-primary);
}

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

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

.signal-chip {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  padding: 2px 6px;
  background: var(--canvas-dark);
  border: 1px solid var(--border-hairline);
  margin: 2px;
}

.signal-chip.avail {
  border-color: rgba(89, 161, 79, 0.4);
  color: #71BF65;
}

.signal-chip.est {
  border-color: rgba(225, 156, 36, 0.4);
  color: #E19C24;
}

/* Architecture Specs Section */
.arch-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
}

.arch-box {
  background: var(--surface-dark);
  border: 1px solid var(--border-hairline);
  padding: var(--spacing-xl);
}

.arch-box h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
}

.arch-box p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.code-block {
  background: var(--canvas-dark);
  border: 1px solid var(--border-hairline);
  padding: var(--spacing-md);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-primary);
  overflow-x: auto;
  line-height: 1.5;
}

/* Footer */
.site-footer {
  background: var(--surface-dark);
  border-top: 1px solid var(--border-hairline);
  padding: var(--spacing-3xl) 0 var(--spacing-xl) 0;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-3xl);
}

.footer-brand p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-top: var(--spacing-md);
  max-width: 380px;
}

.footer-col h5 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  border-top: 1px solid var(--border-hairline);
  padding-top: var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

/* Privacy Page Specific Layout */
.doc-page {
  padding: var(--spacing-3xl) 0;
}

.doc-header {
  border-bottom: 1px solid var(--border-hairline);
  padding-bottom: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.doc-meta {
  display: flex;
  gap: var(--spacing-lg);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: var(--spacing-md);
}

.doc-content {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--spacing-3xl);
}

.doc-sidebar {
  position: sticky;
  top: 96px;
  align-self: start;
}

.doc-nav {
  list-style: none;
  border-left: 1px solid var(--border-hairline);
  display: flex;
  flex-direction: column;
}

.doc-nav a {
  display: block;
  padding: 8px 16px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-secondary);
  border-left: 2px solid transparent;
  margin-left: -1px;
}

.doc-nav a:hover, .doc-nav a.active {
  color: var(--text-primary);
  border-left-color: var(--sink-climate);
  background: var(--surface-dark);
}

.doc-body {
  max-width: 800px;
}

.doc-section {
  margin-bottom: var(--spacing-3xl);
  scroll-margin-top: 100px;
}

.doc-section h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-xs);
  border-bottom: 1px solid var(--border-hairline);
}

.doc-section h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.doc-section p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-bottom: var(--spacing-md);
}

.doc-section ul, .doc-section ol {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
  padding-left: 20px;
  margin-bottom: var(--spacing-md);
}

.doc-section li {
  margin-bottom: 6px;
}

.doc-callout {
  background: var(--surface-dark);
  border: 1px solid var(--border-hairline);
  border-left: 2px solid var(--sink-regen);
  padding: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  font-size: 0.875rem;
  line-height: 1.6;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .showcase-panel {
    grid-template-columns: 1fr;
  }
  .arch-grid {
    grid-template-columns: 1fr;
  }
  .doc-content {
    grid-template-columns: 1fr;
  }
  .doc-sidebar {
    display: none;
  }
}

@media (max-width: 768px) {
  .site-header .container {
    height: auto;
    padding-top: 12px;
    padding-bottom: 12px;
    flex-direction: column;
    gap: var(--spacing-md);
  }
  .nav-links {
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }
  .comparison-container {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .flow-simulator-deck {
    padding: var(--spacing-md);
  }
  .showcase-content {
    padding: var(--spacing-md);
  }
}