/* =============================================
   GTC26 Navigation Spec Document Styles
   ============================================= */

/* CSS Custom Properties */
:root {
  /* Colors - NVIDIA Brand */
  --color-black: #000000;
  --color-gray-950: #0d0d0d;
  --color-gray-900: #1a1a1a;
  --color-gray-850: #242424;
  --color-gray-800: #333333;
  --color-gray-700: #444444;
  --color-gray-600: #666666;
  --color-gray-400: #999999;
  --color-gray-100: #e0e0e0;
  --color-white: #ffffff;
  --color-brand-green: #76b900;
  --color-brand-green-hover: #8ed100;
  
  /* Typography */
  --font-family: 'NVIDIA Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', Consolas, monospace;
  
  /* Sidebar */
  --sidebar-width: 280px;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-gray-100);
  background-color: var(--color-gray-950);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* =============================================
   Layout - Sidebar
   ============================================= */
.spec-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background-color: var(--color-black);
  border-right: 1px solid var(--color-gray-800);
  display: flex;
  flex-direction: column;
  z-index: 100;
}

.sidebar-header {
  padding: 24px 20px;
  border-bottom: 1px solid var(--color-gray-800);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-gray-400);
  text-decoration: none;
  font-size: 13px;
  margin-bottom: 16px;
  transition: color var(--transition-fast);
}

.back-link:hover {
  color: var(--color-brand-green);
}

.sidebar-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 4px;
}

.sidebar-version {
  font-size: 12px;
  color: var(--color-gray-600);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 16px 0;
}

.sidebar-nav ul {
  list-style: none;
}

.sidebar-nav .nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  color: var(--color-gray-400);
  text-decoration: none;
  font-size: 14px;
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
}

.sidebar-nav .nav-link:hover {
  color: var(--color-gray-100);
  background-color: var(--color-gray-900);
}

.sidebar-nav .nav-link.active {
  color: var(--color-brand-green);
  background-color: rgba(118, 185, 0, 0.08);
  border-left-color: var(--color-brand-green);
}

.sidebar-nav .nav-link i {
  width: 18px;
  text-align: center;
  font-size: 14px;
}

/* =============================================
   Layout - Main Content
   ============================================= */
.spec-content {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  padding: 40px 60px 80px;
  max-width: 1100px;
}

.spec-section {
  margin-bottom: 80px;
  scroll-margin-top: 40px;
}

.section-header {
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-gray-800);
}

.section-header h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 8px;
}

.section-header p {
  font-size: 16px;
  color: var(--color-gray-400);
}

.subsection {
  margin-bottom: 48px;
}

.subsection h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-gray-100);
  margin-bottom: 20px;
}

/* =============================================
   Color Swatches
   ============================================= */
.color-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.color-swatch {
  background-color: var(--color-gray-900);
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--color-gray-800);
}

.swatch-preview {
  height: 80px;
  background-color: var(--swatch-color);
  border: var(--border, none);
}

.swatch-info {
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.swatch-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-gray-100);
}

.swatch-value {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-brand-green);
  background: none;
  padding: 0;
}

.swatch-var {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-gray-500);
  background: none;
  padding: 0;
}

/* =============================================
   Typography Showcase
   ============================================= */
.type-specimen {
  background-color: var(--color-gray-900);
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 16px;
  border: 1px solid var(--color-gray-800);
}

.type-sample {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.type-preview {
  font-size: 28px;
  color: var(--color-white);
}

.type-name {
  font-size: 14px;
  color: var(--color-gray-400);
}

.type-scale {
  display: flex;
  flex-direction: column;
  gap: 16px;
  background-color: var(--color-gray-900);
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 16px;
  border: 1px solid var(--color-gray-800);
}

.type-scale-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-gray-800);
}

.type-scale-item:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.type-scale-preview {
  color: var(--color-gray-100);
}

.type-scale-meta {
  display: flex;
  gap: 16px;
}

.type-scale-meta code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-gray-400);
  background-color: var(--color-gray-850);
  padding: 4px 8px;
  border-radius: 4px;
}

/* =============================================
   Spacing Showcase
   ============================================= */
.spacing-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
}

.spacing-item {
  background-color: var(--color-gray-900);
  border-radius: 8px;
  padding: 16px;
  border: 1px solid var(--color-gray-800);
}

.spacing-visual {
  background-color: var(--color-brand-green);
  opacity: 0.6;
  border-radius: 4px;
  margin-bottom: 12px;
}

.spacing-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.spacing-name {
  font-size: 13px;
  color: var(--color-gray-100);
  font-weight: 500;
}

.spacing-meta code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-gray-400);
  background: none;
  padding: 0;
}

/* Dimension Diagram */
.dimension-diagram {
  display: flex;
  justify-content: center;
  padding: 40px;
  background-color: var(--color-gray-900);
  border-radius: 8px;
  margin-bottom: 16px;
  border: 1px solid var(--color-gray-800);
}

.diagram-box {
  border: 2px dashed var(--color-brand-green);
  border-radius: 4px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.diagram-label {
  font-size: 14px;
  color: var(--color-gray-400);
}

.diagram-measurements {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-brand-green);
}

.dim-w {
  position: absolute;
  bottom: -24px;
  left: 50%;
  transform: translateX(-50%);
}

.dim-h {
  position: absolute;
  right: -50px;
  top: 50%;
  transform: translateY(-50%);
}

/* =============================================
   Breakpoint Diagram
   ============================================= */
.breakpoint-diagram {
  padding: 24px;
  background-color: var(--color-gray-900);
  border-radius: 8px;
  margin-bottom: 24px;
  border: 1px solid var(--color-gray-800);
}

.breakpoint-bar {
  display: flex;
  border-radius: 8px;
  overflow: hidden;
  height: 60px;
}

.bp-segment {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  border-right: 1px solid var(--color-gray-800);
}

.bp-segment:last-child {
  border-right: none;
}

.bp-desktop { background-color: rgba(118, 185, 0, 0.3); }
.bp-laptop { background-color: rgba(118, 185, 0, 0.2); }
.bp-tablet { background-color: rgba(118, 185, 0, 0.15); }
.bp-phone { background-color: rgba(118, 185, 0, 0.1); }

.bp-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-gray-100);
}

.bp-range {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-gray-400);
}

.bp-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
}

.bp-badge.bp-desktop { background-color: rgba(118, 185, 0, 0.3); color: var(--color-brand-green); }
.bp-badge.bp-laptop { background-color: rgba(118, 185, 0, 0.2); color: var(--color-brand-green); }
.bp-badge.bp-tablet { background-color: rgba(118, 185, 0, 0.15); color: var(--color-brand-green); }
.bp-badge.bp-phone { background-color: rgba(118, 185, 0, 0.1); color: var(--color-brand-green); }

/* =============================================
   Spec Table
   ============================================= */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--color-gray-900);
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--color-gray-800);
  margin-bottom: 16px;
}

.spec-table th,
.spec-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-gray-800);
}

.spec-table th {
  background-color: var(--color-gray-850);
  font-size: 12px;
  font-weight: 600;
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.spec-table td {
  font-size: 14px;
  color: var(--color-gray-100);
}

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

.spec-table code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-brand-green);
  background-color: var(--color-gray-850);
  padding: 2px 6px;
  border-radius: 3px;
}

/* =============================================
   Code Blocks
   ============================================= */
.code-block-wrapper {
  background-color: var(--color-gray-900);
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--color-gray-800);
  margin-bottom: 16px;
}

.code-block-wrapper.collapsed .code-block {
  display: none;
}

.code-block-wrapper.collapsed .toggle-btn i {
  transform: rotate(0);
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background-color: var(--color-gray-850);
  border-bottom: 1px solid var(--color-gray-800);
}

.code-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.code-actions {
  display: flex;
  gap: 8px;
}

.copy-btn,
.toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--color-gray-800);
  color: var(--color-gray-400);
  border: none;
  padding: 6px 12px;
  border-radius: 4px;
  font-size: 12px;
  font-family: var(--font-family);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.copy-btn:hover,
.toggle-btn:hover {
  background-color: var(--color-gray-700);
  color: var(--color-gray-100);
}

.copy-btn.copied {
  background-color: var(--color-brand-green);
  color: var(--color-black);
}

.toggle-btn i {
  transition: transform var(--transition-fast);
  transform: rotate(180deg);
}

.code-block {
  padding: 16px;
  margin: 0;
  overflow-x: auto;
}

.code-block code {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-gray-100);
  background: none;
  padding: 0;
}

/* =============================================
   Component Previews
   ============================================= */
.component-preview {
  margin-bottom: 16px;
}

.preview-container {
  padding: 24px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.preview-container.dark-bg {
  background-color: var(--color-black);
  border: 1px solid var(--color-gray-800);
}

/* Demo Components */
.demo-nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-gray-600);
  text-decoration: none;
  font-size: 16px;
  font-family: var(--font-family);
  line-height: 30px;
  text-transform: capitalize;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  transition: color var(--transition-fast);
}

.demo-nav-link:hover,
.demo-nav-link.hover {
  color: var(--color-gray-100);
}

.demo-dropdown-icon {
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform var(--transition-fast);
}

.demo-dropdown-icon.rotated {
  transform: rotate(180deg);
}

.demo-dropdown-wrapper {
  position: relative;
}

.demo-dropdown-wrapper .demo-dropdown-toggle.open + .demo-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.demo-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 180px;
  background-color: var(--color-gray-900);
  border: 1px solid var(--color-gray-800);
  list-style: none;
  padding: 8px 0;
  margin-top: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
}

.demo-dropdown-link {
  display: block;
  padding: 10px 16px;
  color: var(--color-gray-400);
  text-decoration: none;
  font-size: 14px;
  transition: all var(--transition-fast);
}

.demo-dropdown-link:hover {
  background-color: var(--color-gray-800);
  color: var(--color-gray-100);
}

.demo-cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background-color: var(--color-brand-green);
  color: var(--color-black);
  text-decoration: none;
  font-size: 16px;
  font-weight: 700;
  padding: 12px 14px;
  line-height: 1.25;
  transition: background-color var(--transition-fast);
}

.demo-cta-button:hover,
.demo-cta-button.hover {
  background-color: var(--color-brand-green-hover);
}

.demo-cta-divider {
  font-weight: 400;
  opacity: 0.7;
}

.demo-event-details {
  font-size: 16px;
  color: var(--color-gray-100);
}

.demo-event-details strong {
  font-weight: 700;
}

.demo-divider {
  margin: 0 4px;
  opacity: 0.6;
}

.demo-region-selector {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  color: var(--color-gray-600);
  font-size: 14px;
  font-family: var(--font-family);
  cursor: pointer;
  padding: 4px 8px;
  transition: color var(--transition-fast);
}

.demo-region-selector:hover {
  color: var(--color-gray-100);
}

/* =============================================
   State Comparisons
   ============================================= */
.state-description {
  color: var(--color-gray-400);
  font-size: 14px;
  margin-bottom: 20px;
}

.state-comparison {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 24px;
}

.state-item {
  background-color: var(--color-gray-900);
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--color-gray-800);
}

.state-label {
  display: block;
  padding: 12px 16px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background-color: var(--color-gray-850);
  border-bottom: 1px solid var(--color-gray-800);
}

.state-preview {
  padding: 20px;
}

/* Demo Nav Bar */
.demo-nav-bar {
  background-color: var(--color-black);
  border-radius: 4px;
  overflow: hidden;
}

.demo-info-bar {
  height: 44px;
  background-color: var(--color-gray-900);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--color-gray-400);
  border-bottom: 1px solid var(--color-gray-800);
}

.demo-main-bar {
  display: flex;
  align-items: center;
  height: 60px;
}

.demo-logo-full {
  width: 80px;
  height: 104px;
  background-color: var(--color-brand-green);
  opacity: 0.3;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: var(--color-gray-100);
  flex-shrink: 0;
}

.demo-logo-small {
  width: 60px;
  height: 60px;
  background-color: var(--color-brand-green);
  opacity: 0.3;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  color: var(--color-gray-100);
  flex-shrink: 0;
}

.demo-nav-content {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--color-gray-400);
}

.demo-collapsed .demo-info-bar {
  display: none;
}

/* State Grid */
.state-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.state-card {
  background-color: var(--color-gray-900);
  border-radius: 8px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--color-gray-800);
}

.state-card-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-gray-400);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.state-color {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-gray-500);
  background-color: var(--color-gray-850);
  padding: 4px 8px;
  border-radius: 4px;
}

/* =============================================
   Z-Index Diagram
   ============================================= */
.z-index-diagram {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.z-layer {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background-color: var(--color-gray-900);
  border-radius: 8px;
  border: 1px solid var(--color-gray-800);
  border-left: 4px solid var(--color-brand-green);
}

.z-value {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-brand-green);
  min-width: 60px;
}

.z-name {
  font-size: 14px;
  color: var(--color-gray-100);
  flex: 1;
}

.z-layer code {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-gray-400);
  background-color: var(--color-gray-850);
  padding: 4px 8px;
  border-radius: 4px;
}

/* =============================================
   Feature List
   ============================================= */
.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 16px;
  background-color: var(--color-gray-900);
  border-radius: 6px;
  border: 1px solid var(--color-gray-800);
}

.feature-list li i {
  color: var(--color-brand-green);
  margin-top: 2px;
}

.feature-list li span {
  font-size: 14px;
  color: var(--color-gray-100);
}

.feature-list li strong {
  color: var(--color-white);
}

/* =============================================
   Footer
   ============================================= */
.spec-footer {
  margin-top: 80px;
  padding-top: 40px;
  border-top: 1px solid var(--color-gray-800);
  text-align: center;
}

.spec-footer p {
  font-size: 14px;
  color: var(--color-gray-400);
  margin-bottom: 8px;
}

.spec-footer a {
  color: var(--color-brand-green);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.spec-footer a:hover {
  color: var(--color-brand-green-hover);
}

/* =============================================
   Responsive Styles
   ============================================= */
@media (max-width: 1200px) {
  .spec-content {
    padding: 40px 40px 80px;
  }
}

@media (max-width: 900px) {
  .spec-sidebar {
    width: 100%;
    height: auto;
    position: relative;
    border-right: none;
    border-bottom: 1px solid var(--color-gray-800);
  }
  
  .sidebar-nav {
    padding: 8px 0 16px;
  }
  
  .sidebar-nav ul {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    padding: 0 16px;
  }
  
  .sidebar-nav .nav-link {
    padding: 8px 16px;
    border-left: none;
    border-radius: 4px;
    font-size: 13px;
  }
  
  .sidebar-nav .nav-link.active {
    border-left: none;
  }
  
  .spec-content {
    margin-left: 0;
    padding: 32px 20px 60px;
  }
  
  .state-comparison,
  .state-grid {
    grid-template-columns: 1fr;
  }
  
  .color-grid {
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  }
  
  .breakpoint-bar {
    flex-direction: column;
    height: auto;
  }
  
  .bp-segment {
    border-right: none;
    border-bottom: 1px solid var(--color-gray-800);
    padding: 12px;
  }
  
  .bp-segment:last-child {
    border-bottom: none;
  }
}

@media (max-width: 600px) {
  .section-header h2 {
    font-size: 26px;
  }
  
  .spec-table {
    font-size: 13px;
  }
  
  .spec-table th,
  .spec-table td {
    padding: 10px 12px;
  }
  
  .preview-container {
    padding: 16px;
    flex-wrap: wrap;
  }
}