/* ==========================================================================
   Aequora Sync Official Portal - Design System & Stylesheet
   Ultra-Smooth, Mobile-First, Responsive (320px to 4K), Dark & Light Theme
   ========================================================================== */

:root {
  /* Dark Theme Palette (Default) */
  --bg-base: #060911;
  --bg-elevated: #0b1120;
  --bg-surface: #10192e;
  --bg-surface-hover: #17233f;
  --bg-glass: rgba(10, 16, 32, 0.88);
  --bg-glass-card: rgba(14, 22, 42, 0.78);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.16);
  --border-highlight: rgba(0, 240, 255, 0.35);
  --border-glow: rgba(0, 240, 255, 0.5);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #00f0ff;
  
  /* Vibrant Brand Gradients */
  --primary-cyan: #00f0ff;
  --primary-blue: #0284c7;
  --accent-purple: #a855f7;
  --accent-violet: #8b5cf6;
  --gradient-brand: linear-gradient(135deg, #00f0ff 0%, #38bdf8 50%, #a855f7 100%);
  --gradient-card-glow: radial-gradient(circle at 50% 0%, rgba(0, 240, 255, 0.12), transparent 70%);

  /* Status Colors */
  --status-success: #10b981;
  --status-warning: #f59e0b;
  --status-danger: #f43f5e;
  --status-info: #0ea5e9;

  /* Code Syntax Theme (Dark) */
  --code-bg: #070c17;
  --code-border: rgba(255, 255, 255, 0.1);
  --code-text: #e2e8f0;

  /* Layout Dimensions */
  --header-height: 64px;
  --sidebar-width: 290px;
  --toc-width: 240px;
  --content-max-width: 1440px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-glow: 0 0 30px -5px rgba(0, 240, 255, 0.25);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);

  /* Fonts */
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
}

[data-theme="light"] {
  --bg-base: #f8fafc;
  --bg-elevated: #ffffff;
  --bg-surface: #f1f5f9;
  --bg-surface-hover: #e2e8f0;
  --bg-glass: rgba(255, 255, 255, 0.92);
  --bg-glass-card: rgba(255, 255, 255, 0.88);

  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-medium: rgba(0, 0, 0, 0.15);
  --border-highlight: rgba(2, 132, 199, 0.4);
  --border-glow: rgba(2, 132, 199, 0.5);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-accent: #0284c7;

  --gradient-brand: linear-gradient(135deg, #0284c7 0%, #2563eb 50%, #7c3aed 100%);
  --gradient-card-glow: radial-gradient(circle at 50% 0%, rgba(2, 132, 199, 0.08), transparent 70%);

  --code-bg: #f1f5f9;
  --code-border: #cbd5e1;
  --code-text: #1e293b;

  --shadow-glow: 0 0 25px -5px rgba(2, 132, 199, 0.15);
  --shadow-card: 0 10px 25px -10px rgba(0, 0, 0, 0.08);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  width: 100%;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-base);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.65;
  width: 100%;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 240, 255, 0.08), transparent),
    radial-gradient(ellipse 60% 40% at 90% 80%, rgba(168, 85, 247, 0.06), transparent);
  background-attachment: fixed;
  transition: background-color 0.25s ease, color 0.25s ease;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  -webkit-tap-highlight-color: transparent;
}

code, pre {
  font-family: var(--font-mono);
}

/* Sleek Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* Reading Progress Bar */
.reading-progress-track {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2.5px;
  background: transparent;
  z-index: 101;
}

.reading-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--gradient-brand);
  transition: width 0.08s ease-out;
  box-shadow: 0 0 8px rgba(0, 240, 255, 0.8);
}

/* ==========================================================================
   Header Navigation Bar
   ========================================================================== */
.top-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  gap: 0.75rem;
  width: 100%;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.mobile-menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  transition: all 0.15s ease;
  flex-shrink: 0;
}

.mobile-menu-toggle:hover {
  background: var(--bg-surface-hover);
  border-color: var(--border-highlight);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
  text-decoration: none;
  white-space: nowrap;
}

.brand-icon-logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--gradient-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.15rem;
  color: #060911;
  box-shadow: 0 0 16px rgba(0, 240, 255, 0.4);
  flex-shrink: 0;
}

.brand-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.brand-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--primary-cyan);
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid rgba(0, 240, 255, 0.25);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.brand-version-pill {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 0.15rem 0.45rem;
  border-radius: 10px;
  line-height: 1;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-shrink: 1;
}

.nav-item {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.15s ease;
  white-space: nowrap;
}

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

.nav-item.active {
  color: var(--primary-cyan);
  background: rgba(0, 240, 255, 0.08);
  font-weight: 600;
}

.nav-count-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.1rem 0.35rem;
  border-radius: 10px;
  background: var(--bg-surface);
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
  line-height: 1;
}

.nav-item.active .nav-count-badge {
  background: rgba(0, 240, 255, 0.15);
  color: var(--primary-cyan);
  border-color: rgba(0, 240, 255, 0.3);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.search-trigger-btn {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.45rem 0.85rem;
  color: var(--text-secondary);
  font-size: 0.825rem;
  transition: all 0.15s ease;
}

.search-trigger-btn:hover {
  border-color: var(--border-highlight);
  color: var(--text-primary);
  background: var(--bg-surface-hover);
}

.search-kbd {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 0.1rem 0.35rem;
  color: var(--text-muted);
}

.action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  transition: all 0.15s ease;
  flex-shrink: 0;
}

.action-btn:hover {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
  border-color: var(--border-highlight);
}

/* ==========================================================================
   Mobile Off-Canvas Drawer Navigation
   ========================================================================== */
.mobile-drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(3, 6, 15, 0.75);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.mobile-drawer-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.mobile-drawer {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  width: 310px;
  max-width: 86vw;
  background: var(--bg-elevated);
  border-right: 1px solid var(--border-medium);
  box-shadow: 10px 0 40px rgba(0, 0, 0, 0.7);
  z-index: 999;
  transform: translateX(-100%);
  transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.mobile-drawer.open {
  transform: translateX(0);
}

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
}

.mobile-drawer-close {
  width: 34px;
  height: 34px;
  font-size: 1.1rem;
}

.mobile-drawer-search {
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
}

.mobile-search-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.85rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: all 0.15s ease;
}

.mobile-search-trigger:hover {
  background: var(--bg-surface-hover);
  border-color: var(--border-highlight);
  color: var(--text-primary);
}

.mobile-drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.mobile-nav-group-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.mobile-main-nav {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.mobile-nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.15s ease;
}

.mobile-nav-item:hover {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
}

.mobile-nav-item.active {
  background: rgba(0, 240, 255, 0.1);
  color: var(--primary-cyan);
  font-weight: 600;
}

.mobile-nav-icon {
  font-size: 1.1rem;
  width: 24px;
  text-align: center;
}

.mobile-nav-label {
  flex: 1;
}

.sim-live-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--status-success);
  box-shadow: 0 0 8px var(--status-success);
  animation: pulseDot 1.5s infinite;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.mobile-subnav-section {
  border-top: 1px solid var(--border-subtle);
  padding-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.mobile-drawer-footer {
  padding: 0.9rem 1.25rem;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.mobile-theme-btn, .mobile-github-btn {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0.8rem;
  border-radius: var(--radius-sm);
  font-size: 0.825rem;
  color: var(--text-secondary);
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  transition: all 0.15s ease;
}

.mobile-theme-btn:hover, .mobile-github-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-highlight);
}

/* ==========================================================================
   Site Layout Grid (Desktop Default)
   ========================================================================== */
.site-layout {
  display: flex;
  max-width: var(--content-max-width);
  margin: 0 auto;
  min-height: calc(100vh - var(--header-height));
  position: relative;
  width: 100%;
}

/* Left Sidebar (Desktop Specs/Guides Navigation) */
.sidebar-left {
  width: var(--sidebar-width);
  flex-shrink: 0;
  border-right: 1px solid var(--border-subtle);
  height: calc(100vh - var(--header-height));
  position: sticky;
  top: var(--header-height);
  overflow-y: auto;
  padding: 1.25rem 1rem;
  background: var(--bg-elevated);
  display: none; /* Controlled by body[data-view] */
  flex-direction: column;
}

body[data-view="arch"] .sidebar-left,
body[data-view="guides"] .sidebar-left {
  display: flex;
}

.sidebar-section-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
  padding: 0 0.5rem;
}

.sidebar-tier-group {
  margin-bottom: 1.1rem;
}

.sidebar-tier-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.35rem 0.5rem;
  font-size: 0.775rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
}

.sidebar-tier-header:hover {
  color: var(--text-primary);
  background: var(--bg-surface-hover);
}

.sidebar-tier-list {
  list-style: none;
  margin-top: 0.25rem;
  padding-left: 0.4rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.sidebar-doc-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.55rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: all 0.15s ease;
  line-height: 1.35;
}

.sidebar-doc-link:hover {
  color: var(--text-primary);
  background: var(--bg-surface-hover);
}

.sidebar-doc-link.active {
  color: var(--primary-cyan);
  background: rgba(0, 240, 255, 0.09);
  font-weight: 600;
  border-left: 2px solid var(--primary-cyan);
  padding-left: calc(0.55rem - 2px);
}

.sidebar-doc-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

.sidebar-doc-link.active .sidebar-doc-num {
  color: var(--primary-cyan);
}

/* Main Content Container */
.main-content {
  flex: 1 1 auto;
  min-width: 0;
  width: 100%;
  padding: 2.25rem 3rem;
  outline: none;
  box-sizing: border-box;
}

/* Right Table of Contents (Desktop) */
.sidebar-right-toc {
  width: var(--toc-width);
  flex-shrink: 0;
  border-left: 1px solid var(--border-subtle);
  height: calc(100vh - var(--header-height));
  position: sticky;
  top: var(--header-height);
  overflow-y: auto;
  padding: 1.5rem 1.25rem;
  display: none; /* Controlled by body[data-view] */
}

body[data-view="arch"] .sidebar-right-toc,
body[data-view="guides"] .sidebar-right-toc {
  display: block;
}

.toc-title {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.toc-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.toc-link {
  display: block;
  font-size: 0.785rem;
  color: var(--text-muted);
  line-height: 1.4;
  padding: 0.2rem 0;
  transition: all 0.15s ease;
}

.toc-link:hover {
  color: var(--text-primary);
}

.toc-link.active {
  color: var(--primary-cyan);
  font-weight: 600;
  padding-left: 0.35rem;
  border-left: 2px solid var(--primary-cyan);
}

.toc-depth-3 {
  padding-left: 0.75rem;
  font-size: 0.735rem;
}

/* ==========================================================================
   Mobile Floating Action Button & Bottom Sheet TOC
   ========================================================================== */
.mobile-toc-fab {
  display: none;
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 900;
  background: var(--bg-surface);
  border: 1px solid var(--border-highlight);
  color: var(--primary-cyan);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5), 0 0 15px rgba(0, 240, 255, 0.25);
  padding: 0.6rem 1.1rem;
  border-radius: 30px;
  font-size: 0.85rem;
  font-weight: 600;
  align-items: center;
  gap: 0.45rem;
  cursor: pointer;
  transition: all 0.2s ease;
  backdrop-filter: blur(8px);
}

.mobile-toc-fab:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(0, 0, 0, 0.6), 0 0 20px rgba(0, 240, 255, 0.4);
}

.mobile-toc-sheet-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(3, 6, 15, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 950;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.mobile-toc-sheet-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.mobile-toc-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  max-height: 75vh;
  background: var(--bg-elevated);
  border-top: 1px solid var(--border-medium);
  border-radius: 20px 20px 0 0;
  box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.7);
  z-index: 951;
  transform: translateY(100%);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.mobile-toc-sheet.open {
  transform: translateY(0);
}

.mobile-toc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.4rem;
  border-bottom: 1px solid var(--border-subtle);
}

.mobile-toc-title {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.mobile-toc-list {
  list-style: none;
  overflow-y: auto;
  padding: 1rem 1.4rem 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.mobile-toc-list a {
  display: block;
  padding: 0.55rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: all 0.15s ease;
}

.mobile-toc-list a:hover {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
}

/* ==========================================================================
   VIEW 1: OVERVIEW PAGE & HERO
   ========================================================================== */
.overview-hero {
  text-align: center;
  padding: 2.5rem 0 3.5rem;
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.25);
  border-radius: 30px;
  padding: 0.35rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary-cyan);
  margin-bottom: 1.5rem;
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.15);
}

.hero-title {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(2rem, 1.6rem + 2.2vw, 3.8rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
  word-break: break-word;
}

.hero-title-gradient {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(0.95rem, 0.9rem + 0.3vw, 1.2rem);
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 740px;
  margin: 0 auto 2rem;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
  width: 100%;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--gradient-brand);
  color: #060911;
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  box-shadow: 0 0 25px rgba(0, 240, 255, 0.35);
  transition: all 0.2s ease;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 35px rgba(0, 240, 255, 0.55);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background: var(--bg-surface-hover);
  border-color: var(--border-highlight);
  transform: translateY(-2px);
}

.hero-code-box {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--primary-cyan);
  box-shadow: var(--shadow-card);
  max-width: 100%;
}

.copy-mini-btn {
  color: var(--text-muted);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.55rem;
  font-size: 0.75rem;
  font-family: var(--font-body);
  transition: all 0.15s ease;
}

.copy-mini-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-highlight);
}

/* Stats Counters Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin: 3rem 0;
  width: 100%;
}

.stat-card {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.25rem;
  text-align: center;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all 0.2s ease;
}

.stat-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-highlight);
  box-shadow: 0 8px 30px rgba(0, 240, 255, 0.12);
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 800;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
  margin-bottom: 0.35rem;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Architecture Visualizer Diagram */
.section-heading-wrap {
  text-align: center;
  margin: 3.5rem 0 2rem;
  width: 100%;
}

.section-pill-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary-cyan);
  margin-bottom: 0.5rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 1.3rem + 1vw, 2.3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.arch-visual-diagram {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin: 2rem 0 3.5rem;
  width: 100%;
}

.arch-visual-node {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: all 0.2s ease;
  width: 100%;
}

.arch-visual-node:hover {
  transform: translateY(-3px);
  border-color: var(--border-highlight);
  box-shadow: 0 10px 30px rgba(0, 240, 255, 0.1);
}

.arch-node-header {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.arch-node-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid rgba(0, 240, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--primary-cyan);
}

.arch-node-title {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.arch-node-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.arch-node-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: auto;
}

.arch-node-pill {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
}

/* Feature Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
  margin: 2rem 0;
  width: 100%;
}

.feature-card {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: all 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-highlight);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.feature-icon-wrap {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: rgba(168, 85, 247, 0.12);
  border: 1px solid rgba(168, 85, 247, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: var(--accent-purple);
}

.feature-title {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.feature-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* Framework Ecosystem Grid */
.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 2rem 0 3.5rem;
  width: 100%;
}

.eco-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: all 0.15s ease;
}

.eco-card:hover {
  border-color: var(--border-highlight);
  background: var(--bg-surface-hover);
}

.eco-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.35rem;
}

.eco-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   VIEW 2: SPECIFICATIONS & GUIDES READER
   ========================================================================== */
.doc-header-card {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 2rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  width: 100%;
}

.doc-meta-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

.doc-part-pill {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  background: var(--gradient-brand);
  color: #060911;
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
}

.doc-tier-pill {
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  color: var(--text-secondary);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
}

.doc-stat-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.doc-title-main {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 1.3rem + 1.2vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 0.75rem;
  word-break: break-word;
}

.doc-summary-text {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.doc-invariants-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
}

.doc-inv-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
}

.inv-code-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary-cyan);
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.25);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s ease;
  display: inline-block;
}

.inv-code-tag:hover {
  background: rgba(0, 240, 255, 0.2);
  border-color: var(--primary-cyan);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
}

/* Markdown Content Styles */
.markdown-body {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-primary);
  width: 100%;
  overflow-wrap: break-word;
  word-break: break-word;
}

.markdown-body h1, .markdown-body h2, .markdown-body h3, .markdown-body h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-top: 2.25rem;
  margin-bottom: 0.85rem;
  color: var(--text-primary);
  scroll-margin-top: calc(var(--header-height) + 1.5rem);
  word-break: break-word;
}

.markdown-body h1 { font-size: 1.85rem; border-bottom: 1px solid var(--border-subtle); padding-bottom: 0.5rem; }
.markdown-body h2 { font-size: 1.45rem; border-bottom: 1px solid var(--border-subtle); padding-bottom: 0.4rem; }
.markdown-body h3 { font-size: 1.15rem; }
.markdown-body h4 { font-size: 1.02rem; }

.markdown-body p {
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
}

.markdown-body ul, .markdown-body ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
  color: var(--text-secondary);
}

.markdown-body li {
  margin-bottom: 0.35rem;
}

.markdown-body blockquote {
  border-left: 3px solid var(--primary-cyan);
  background: rgba(0, 240, 255, 0.04);
  padding: 0.85rem 1.25rem;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 1.5rem 0;
  color: var(--text-primary);
}

.markdown-body pre {
  position: relative;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: var(--radius-md);
  padding: 1.15rem 1.25rem;
  margin: 1.5rem 0;
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--code-text);
  max-width: 100%;
}

.markdown-body :not(pre) > code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-subtle);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  color: var(--primary-cyan);
}

.code-copy-btn {
  position: absolute;
  top: 0.6rem;
  right: 0.6rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.75rem;
  padding: 0.25rem 0.6rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.code-copy-btn:hover {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
  border-color: var(--border-highlight);
}

/* Responsive Markdown Tables */
.table-scroll-wrapper {
  width: 100%;
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  -webkit-overflow-scrolling: touch;
}

.markdown-body table {
  width: 100%;
  min-width: 500px;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.875rem;
}

.markdown-body th {
  background: var(--bg-elevated);
  padding: 0.75rem 1rem;
  font-weight: 700;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border-medium);
  white-space: nowrap;
}

.markdown-body td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

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

.markdown-body tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* Spec Navigation Footer (Prev / Next) */
.doc-footer-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-top: 3.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  width: 100%;
}

.doc-nav-card {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 1.25rem;
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  transition: all 0.2s ease;
}

.doc-nav-card:hover {
  border-color: var(--border-highlight);
  background: var(--bg-surface-hover);
  transform: translateY(-2px);
}

.doc-nav-card.next {
  text-align: right;
}

.doc-nav-direction {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.doc-nav-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--primary-cyan);
}

/* ==========================================================================
   VIEW 3: CRATES & APIS CATALOG (90 CRATES)
   ========================================================================== */
.crates-catalog-header {
  margin-bottom: 2rem;
  width: 100%;
}

.crates-filter-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  margin: 1.25rem 0;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  width: 100%;
}
.crates-filter-bar::-webkit-scrollbar { display: none; }

.layer-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.85rem;
  border-radius: 30px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  font-size: 0.825rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  cursor: pointer;
  transition: all 0.15s ease;
  flex-shrink: 0;
}

.layer-chip:hover {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
  border-color: var(--border-medium);
}

.layer-chip.active {
  background: rgba(0, 240, 255, 0.1);
  border-color: var(--primary-cyan);
  color: var(--primary-cyan);
  font-weight: 600;
}

.crates-search-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
  width: 100%;
}

.crates-search-input-wrap {
  flex: 1 1 260px;
  position: relative;
  width: 100%;
}

.filter-input {
  width: 100%;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.6rem 1rem 0.6rem 2.4rem;
  color: var(--text-primary);
  font-size: 0.875rem;
  outline: none;
  transition: all 0.15s ease;
}

.filter-input:focus {
  border-color: var(--border-highlight);
  box-shadow: 0 0 15px rgba(0, 240, 255, 0.15);
}

.filter-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.crates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
  width: 100%;
}

.crate-card {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.4rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: all 0.2s ease;
  width: 100%;
}

.crate-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-highlight);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.crate-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
}

.crate-name-link {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--primary-cyan);
  word-break: break-all;
}

.crate-version-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  flex-shrink: 0;
}

.crate-layer-badge {
  font-size: 0.725rem;
  font-weight: 600;
  color: var(--accent-purple);
  background: rgba(168, 85, 247, 0.1);
  border: 1px solid rgba(168, 85, 247, 0.25);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  align-self: flex-start;
}

.crate-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  flex: 1;
}

.crate-symbols-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.symbol-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.12rem 0.4rem;
  border-radius: 3px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
}

.crate-card-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-top: auto;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-subtle);
}

.crate-deps-count {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.copy-crate-btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  color: var(--primary-cyan);
  padding: 0.25rem 0.6rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.copy-crate-btn:hover {
  background: rgba(0, 240, 255, 0.1);
  border-color: var(--primary-cyan);
}

/* ==========================================================================
   VIEW 4: INTERACTIVE PROTOCOL SIMULATOR
   ========================================================================== */
.simulator-container {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.sim-header {
  margin-bottom: 2rem;
  text-align: center;
}

.sim-stage-canvas {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-bottom: 2rem;
  width: 100%;
}

.sim-node-box {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.4rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  position: relative;
  width: 100%;
}

.sim-node-box.active {
  border-color: var(--primary-cyan);
  box-shadow: 0 0 25px rgba(0, 240, 255, 0.25);
}

.sim-node-title-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.sim-node-title {
  font-weight: 700;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.sim-node-status {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--status-success);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.sim-node-status.offline {
  background: rgba(245, 158, 11, 0.15);
  color: var(--status-warning);
  border-color: rgba(245, 158, 11, 0.3);
}

.sim-state-json {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: var(--radius-md);
  padding: 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--code-text);
  max-height: 200px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
  width: 100%;
}

.sim-controls-panel {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 2rem;
  width: 100%;
}

.sim-controls-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.sim-actions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
  width: 100%;
}

.sim-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.65rem 1rem;
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border-medium);
  color: var(--text-primary);
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.15s ease;
  text-align: center;
  min-height: 44px;
}

.sim-btn:hover {
  background: var(--bg-surface-hover);
  border-color: var(--border-highlight);
  transform: translateY(-1px);
}

.sim-btn.primary {
  background: var(--gradient-brand);
  color: #060911;
  border: none;
}

.sim-btn.danger {
  background: rgba(244, 63, 94, 0.12);
  color: var(--status-danger);
  border-color: rgba(244, 63, 94, 0.3);
}

.sim-btn.danger:hover {
  background: rgba(244, 63, 94, 0.2);
}

.sim-logs-panel {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  width: 100%;
}

.sim-logs-title {
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.sim-log-entries {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  max-height: 240px;
  overflow-y: auto;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  width: 100%;
}

.sim-log-entry {
  padding: 0.35rem 0.6rem;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.03);
  word-break: break-word;
}

.sim-log-entry.info { color: var(--text-secondary); }
.sim-log-entry.success { color: var(--status-success); background: rgba(16, 185, 129, 0.06); }
.sim-log-entry.warn { color: var(--status-warning); background: rgba(245, 158, 11, 0.06); }
.sim-log-entry.error { color: var(--status-danger); background: rgba(244, 63, 94, 0.06); }

/* ==========================================================================
   VIEW 5: INVARIANT REGISTRY (346 INVARIANTS)
   ========================================================================== */
.invariants-header {
  margin-bottom: 2rem;
  width: 100%;
}

.inv-categories-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  overflow-x: auto;
  padding-bottom: 0.5rem;
  margin: 1.25rem 0;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  width: 100%;
}
.inv-categories-bar::-webkit-scrollbar { display: none; }

.inv-cat-chip {
  padding: 0.4rem 0.8rem;
  border-radius: 30px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  cursor: pointer;
  transition: all 0.15s ease;
  flex-shrink: 0;
}

.inv-cat-chip:hover {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
}

.inv-cat-chip.active {
  background: rgba(0, 240, 255, 0.1);
  border-color: var(--primary-cyan);
  color: var(--primary-cyan);
  font-weight: 600;
}

.invariants-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.25rem;
  width: 100%;
}

.inv-card {
  background: var(--bg-glass-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.35rem;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  transition: all 0.2s ease;
  width: 100%;
}

.inv-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-highlight);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.35);
}

.inv-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.inv-card-code {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--primary-cyan);
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.25);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
}

.inv-card-cat {
  font-size: 0.7rem;
  color: var(--text-muted);
  background: var(--bg-surface);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
}

.inv-card-name {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.inv-card-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.inv-tests-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.35rem;
  margin-top: auto;
  padding-top: 0.6rem;
  border-top: 1px solid var(--border-subtle);
}

.inv-test-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.725rem;
  color: var(--text-muted);
}

.inv-test-fn {
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

/* ==========================================================================
   Search Modal Dialog (Cmd+K)
   ========================================================================== */
.search-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(3, 6, 15, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1100;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 10vh 1rem 1rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.search-modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.search-modal {
  width: 640px;
  max-width: 100%;
  max-height: 80vh;
  background: var(--bg-elevated);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card), var(--shadow-glow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: scale(0.96);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.search-modal-backdrop.open .search-modal {
  transform: scale(1);
}

.search-input-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
}

.search-input-icon {
  font-size: 1.1rem;
  color: var(--primary-cyan);
}

#search-modal-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-size: 1rem;
  color: var(--text-primary);
}

.search-modal-close-btn {
  width: 28px;
  height: 28px;
}

.search-filters-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.25rem;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  overflow-x: auto;
  scrollbar-width: none;
}
.search-filters-bar::-webkit-scrollbar { display: none; }

.search-filter-chip {
  padding: 0.25rem 0.65rem;
  border-radius: 20px;
  background: transparent;
  border: 1px solid var(--border-subtle);
  font-size: 0.75rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
  flex-shrink: 0;
}

.search-filter-chip:hover {
  color: var(--text-primary);
  border-color: var(--border-medium);
}

.search-filter-chip.active {
  background: rgba(0, 240, 255, 0.12);
  border-color: var(--primary-cyan);
  color: var(--primary-cyan);
  font-weight: 600;
}

.search-results-list {
  flex: 1;
  overflow-y: auto;
  padding: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  max-height: 420px;
}

.search-result-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.65rem 0.85rem;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  transition: all 0.15s ease;
  cursor: pointer;
}

.search-result-item:hover, .search-result-item.selected {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
}

.search-result-title {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--primary-cyan);
}

.search-result-snippet {
  font-size: 0.775rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.search-modal-footer {
  padding: 0.65rem 1.25rem;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
}

.search-shortcut-hints {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.725rem;
  color: var(--text-muted);
}

.search-shortcut-hints kbd {
  font-family: var(--font-mono);
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: 3px;
  padding: 0.1rem 0.3rem;
  margin-right: 0.2rem;
}

/* Invariant Detail Modal */
.inv-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(3, 6, 15, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 1200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.inv-modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.inv-modal {
  width: 580px;
  max-width: 95vw;
  background: var(--bg-elevated);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card), var(--shadow-glow);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.inv-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.4rem;
  border-bottom: 1px solid var(--border-subtle);
}

.inv-modal-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.inv-modal-code {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--primary-cyan);
  background: rgba(0, 240, 255, 0.1);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}

.inv-modal-name {
  font-weight: 700;
  font-size: 1.1rem;
}

.inv-modal-body {
  padding: 1.4rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-height: 70vh;
  overflow-y: auto;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 1500;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast-item {
  background: var(--bg-elevated);
  border: 1px solid var(--border-highlight);
  box-shadow: var(--shadow-card);
  padding: 0.65rem 1.1rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.55rem;
  animation: toastIn 0.25s ease forwards;
  pointer-events: auto;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   RIGID RESPONSIVE BREAKPOINTS (Mobile & Tablet Hard Overrides)
   ========================================================================== */

/* Large Desktop / Wide Screens */
@media (min-width: 1441px) {
  .main-content {
    padding: 3rem 4rem;
  }
}

/* Medium Desktop / Small Desktop */
@media (max-width: 1200px) {
  .sidebar-right-toc {
    display: none !important;
    width: 0 !important;
  }
  .main-content {
    padding: 2.25rem 2rem;
  }
}

/* Tablet & Mobile Screens (<= 1024px) */
@media (max-width: 1024px) {
  .sidebar-left,
  .sidebar-right-toc {
    display: none !important;
    width: 0 !important;
    max-width: 0 !important;
    flex: 0 0 0 !important;
    visibility: hidden !important;
    pointer-events: none !important;
  }

  .site-layout {
    display: block !important;
    width: 100% !important;
    max-width: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
    overflow-x: hidden !important;
  }

  .main-content {
    width: 100% !important;
    max-width: 100% !important;
    min-width: 0 !important;
    padding: 1.5rem 1.25rem !important;
    box-sizing: border-box !important;
    overflow-x: hidden !important;
  }

  .mobile-menu-toggle {
    display: flex !important;
  }

  .header-nav {
    display: none !important;
  }

  .search-btn-text,
  .search-kbd {
    display: none !important;
  }

  .search-trigger-btn {
    padding: 0.45rem 0.6rem !important;
  }

  .mobile-toc-fab {
    display: flex !important;
  }

  .arch-visual-diagram {
    grid-template-columns: 1fr !important;
  }

  .sim-stage-canvas {
    grid-template-columns: 1fr !important;
  }

  .doc-footer-nav {
    grid-template-columns: 1fr !important;
  }
}

/* Mobile Phones (<= 640px) */
@media (max-width: 640px) {
  .top-header {
    padding: 0 0.85rem !important;
    height: 58px !important;
  }

  .brand-badge {
    display: none !important;
  }

  .brand-version-pill {
    display: none !important;
  }

  .main-content {
    padding: 1.25rem 0.85rem !important;
  }

  .overview-hero {
    padding: 1.5rem 0 2.5rem !important;
  }

  .hero-title {
    font-size: 1.85rem !important;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr !important;
    gap: 0.75rem !important;
    margin: 2rem 0 !important;
  }

  .stat-card {
    padding: 1.1rem 0.85rem !important;
  }

  .stat-number {
    font-size: 1.85rem !important;
  }

  .hero-cta-group {
    flex-direction: column !important;
    width: 100% !important;
    gap: 0.75rem !important;
  }

  .btn-primary, .btn-secondary {
    width: 100% !important;
    justify-content: center !important;
    padding: 0.75rem 1.25rem !important;
  }

  .hero-code-box {
    width: 100% !important;
    font-size: 0.8rem !important;
    padding: 0.55rem 0.85rem !important;
  }

  .crates-grid,
  .invariants-grid {
    grid-template-columns: 1fr !important;
    gap: 1rem !important;
  }

  .doc-header-card {
    padding: 1.25rem 1rem !important;
  }

  .search-modal {
    max-height: 90vh !important;
  }

  .mobile-toc-fab {
    bottom: 1.2rem !important;
    right: 1.2rem !important;
    padding: 0.5rem 0.95rem !important;
    font-size: 0.8rem !important;
  }
}


/* =========================================================================
   CRATE API DETAIL MODAL & DRAWER
   ========================================================================= */
.crate-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(3, 6, 15, 0.85);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1250;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.crate-modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.crate-modal {
  width: 980px;
  max-width: 95vw;
  max-height: 90vh;
  background: var(--bg-elevated);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card), 0 20px 50px rgba(0, 0, 0, 0.7);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: modalScaleIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.crate-modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 1.25rem 1.75rem;
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-card);
}

.crate-modal-title-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  flex: 1;
}

.crate-modal-name {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 1.4rem;
  color: var(--primary-cyan);
}

.crate-modal-version {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--bg-surface);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

.crate-modal-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.4;
  margin: 0.25rem 0 0 0;
}

.crate-modal-body {
  padding: 1.5rem 1.75rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.crate-modal-tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.75rem;
  overflow-x: auto;
}

.crate-tab-btn {
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.crate-tab-btn:hover {
  color: var(--text-primary);
  background: var(--bg-surface);
}

.crate-tab-btn.active {
  color: var(--primary-cyan);
  background: rgba(0, 240, 255, 0.08);
  border-color: rgba(0, 240, 255, 0.25);
}

.api-section-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.api-item-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.25rem;
  margin-bottom: 1rem;
  transition: border-color 0.2s ease;
}

.api-item-card:hover {
  border-color: var(--border-highlight);
}

.api-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.4rem;
}

.api-item-name {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--accent-purple);
}

.api-item-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 0.65rem;
}

.api-methods-list {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-top: 0.5rem;
}

.api-method-sig {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 0.45rem 0.75rem;
  border-radius: 4px;
  color: var(--text-primary);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

.api-variants-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.5rem;
}

.api-variant-badge {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: rgba(245, 158, 11, 0.1);
  color: var(--status-warning);
  border: 1px solid rgba(245, 158, 11, 0.2);
  padding: 0.2rem 0.55rem;
  border-radius: 4px;
}

.api-cargo-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  position: relative;
}

.crate-card {
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.crate-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-card);
}

.crate-explore-btn {
  background: rgba(0, 240, 255, 0.08);
  color: var(--primary-cyan);
  border: 1px solid rgba(0, 240, 255, 0.25);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
}

.crate-explore-btn:hover {
  background: var(--primary-cyan);
  color: #060911;
}

/* =========================================================================
   WIKI VIEW STYLING
   ========================================================================= */
.wiki-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.wiki-header-title {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.wiki-header-desc {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

.wiki-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 2rem;
  align-items: start;
}

@media (max-width: 960px) {
  .wiki-layout {
    grid-template-columns: 1fr;
  }
}

.wiki-sidebar-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  position: sticky;
  top: 5rem;
  max-height: calc(100vh - 6rem);
  overflow-y: auto;
}

.wiki-sidebar-box h2, .wiki-sidebar-box h3 {
  font-size: 0.95rem;
  margin-top: 0.75rem;
  margin-bottom: 0.35rem;
  color: var(--primary-cyan);
}

.wiki-sidebar-box ul {
  list-style: none;
  padding-left: 0.5rem;
  margin: 0.35rem 0;
}

.wiki-sidebar-box li {
  margin: 0.25rem 0;
  font-size: 0.85rem;
}

.wiki-content-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem 2.5rem;
  line-height: 1.7;
}

.wiki-footer-box {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
}