/* ==========================================================================
   agentburp — Production Documentation Stylesheet
   Theme: Dark-First / Modern Developer & Security Tool
   ========================================================================== */

:root {
  --bg-base: #070B12;
  --bg-surface: #0B1220;
  --bg-card: #0E1729;
  --bg-card-hover: #132038;
  --bg-glass: rgba(11, 18, 32, 0.75);
  --bg-terminal: #05080E;
  
  --primary-blue: #1683FF;
  --primary-hover: #0E71E3;
  --accent-cyan: #18D5FF;
  --accent-glow: rgba(24, 213, 255, 0.18);
  --accent-border: rgba(24, 213, 255, 0.35);
  
  --status-success: #10B981;
  --status-warning: #F59E0B;
  --status-error: #EF4444;
  --status-info: #3B82F6;
  
  --text-main: #F5F7FA;
  --text-muted: #8B98A9;
  --text-dim: #546479;
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.15);
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Fira Code", Consolas, "Courier New", monospace;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 35px rgba(24, 213, 255, 0.15);
  --shadow-blue-glow: 0 0 35px rgba(22, 131, 255, 0.2);
  
  --header-height: 72px;
  --sidebar-width: 280px;
  --container-max: 1320px;
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-base);
  color: var(--text-main);
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  line-height: 1.6;
  overflow-x: hidden;
  background: radial-gradient(circle at 50% 0%, rgba(22, 131, 255, 0.08) 0%, transparent 60%),
              radial-gradient(circle at 90% 20%, rgba(24, 213, 255, 0.04) 0%, transparent 50%),
              var(--bg-base);
  min-height: 100vh;
  position: relative;
}

/* Background Cyber Grid */
.bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-size: 40px 40px;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  pointer-events: none;
  z-index: 0;
}

/* Typography & Links */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-main);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

p {
  color: var(--text-muted);
}

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

a:hover {
  color: #63e2ff;
}

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

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Layout with Sticky Sidebar */
.docs-layout {
  display: flex;
  gap: 48px;
  padding-top: 40px;
  padding-bottom: 80px;
  align-items: flex-start;
}

.docs-sidebar {
  width: var(--sidebar-width);
  flex-shrink: 0;
  position: sticky;
  top: calc(var(--header-height) + 24px);
  max-height: calc(100vh - var(--header-height) - 48px);
  overflow-y: auto;
  padding: 16px 8px 24px 0;
}

.docs-sidebar::-webkit-scrollbar {
  width: 4px;
}
.docs-sidebar::-webkit-scrollbar-thumb {
  background: var(--border-medium);
  border-radius: 4px;
}

.docs-main {
  flex: 1;
  min-width: 0;
}

/* Sticky Header */
.site-header {
  position: sticky;
  top: 0;
  height: var(--header-height);
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.03em;
  color: var(--text-main);
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 0 16px rgba(24, 213, 255, 0.25);
  border: 1px solid var(--border-subtle);
}

.brand-badge {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  background: rgba(24, 213, 255, 0.1);
  color: var(--accent-cyan);
  padding: 2px 7px;
  border-radius: 12px;
  border: 1px solid var(--accent-border);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-main);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Button System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 18px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  text-decoration: none;
  font-family: inherit;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-blue), #0d60c4);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 2px 10px rgba(22, 131, 255, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #2a8fff, var(--primary-blue));
  box-shadow: 0 4px 18px rgba(22, 131, 255, 0.5);
  transform: translateY(-1px);
  color: #fff;
}

.btn-secondary {
  background: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-medium);
  color: var(--text-main);
}

.btn-outline-cyan {
  background: rgba(24, 213, 255, 0.05);
  color: var(--accent-cyan);
  border: 1px solid var(--accent-border);
}

.btn-outline-cyan:hover {
  background: rgba(24, 213, 255, 0.15);
  box-shadow: 0 0 15px rgba(24, 213, 255, 0.25);
  color: #fff;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 8px;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

/* Sidebar Nav Menu */
.sidebar-group {
  margin-bottom: 24px;
}

.sidebar-heading {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  margin-bottom: 8px;
  padding-left: 12px;
}

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

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 12px;
  font-size: 0.88rem;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  border-left: 2px solid transparent;
}

.sidebar-link:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.03);
}

.sidebar-link.active {
  color: var(--accent-cyan);
  background: rgba(24, 213, 255, 0.08);
  border-left-color: var(--accent-cyan);
  font-weight: 600;
}

/* Section styling */
.doc-section {
  padding: 48px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.doc-section:last-of-type {
  border-bottom: none;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-cyan);
  background: rgba(24, 213, 255, 0.08);
  border: 1px solid var(--accent-border);
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 14px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.section-title {
  font-size: 2.1rem;
  margin-bottom: 14px;
  letter-spacing: -0.03em;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 720px;
  margin-bottom: 32px;
}

/* Hero Section */
.hero {
  padding: 60px 0 80px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  background: rgba(22, 131, 255, 0.1);
  color: var(--accent-cyan);
  border: 1px solid var(--accent-border);
  padding: 6px 14px;
  border-radius: 30px;
  margin-bottom: 24px;
}

.hero-badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--status-success);
  box-shadow: 0 0 10px var(--status-success);
}

.hero-title {
  font-size: 3.2rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.15;
  margin-bottom: 20px;
}

.gradient-text {
  background: linear-gradient(135deg, #FFFFFF 30%, var(--primary-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-cyan {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, #68e8ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 36px;
}

.hero-ecosystem {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
}

.eco-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-family: var(--font-mono);
  color: var(--text-dim);
}

.eco-item svg {
  color: var(--accent-cyan);
}

/* Terminal Window Component */
.terminal-window {
  background: var(--bg-terminal);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  overflow: hidden;
  position: relative;
}

.terminal-header {
  background: rgba(11, 18, 32, 0.95);
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
}

.terminal-dots {
  display: flex;
  gap: 8px;
}

.dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
}

.dot-red { background: #FF5F56; }
.dot-yellow { background: #FFBD2E; }
.dot-green { background: #27C93F; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 6px;
}

.terminal-body {
  padding: 22px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #D1D5DB;
  line-height: 1.7;
  min-height: 280px;
  max-height: 440px;
  overflow-y: auto;
}

.term-line {
  margin-bottom: 6px;
  display: flex;
  gap: 10px;
}

.term-prompt {
  color: var(--accent-cyan);
  user-select: none;
}

.term-cmd {
  color: #FFFFFF;
  font-weight: 600;
}

.term-comment { color: var(--text-dim); }
.term-log { color: #9CA3AF; }
.term-success { color: var(--status-success); }
.term-warn { color: var(--status-warning); }
.term-highlight { color: var(--accent-cyan); }
.term-blue { color: var(--primary-blue); }

.term-cursor {
  display: inline-block;
  width: 8px;
  height: 15px;
  background: var(--accent-cyan);
  vertical-align: middle;
  animation: blink 1s infinite;
}

@keyframes blink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}

/* Live Terminal Demo Component */
.interactive-terminal-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.terminal-tabs {
  display: flex;
  background: rgba(7, 11, 18, 0.7);
  border-bottom: 1px solid var(--border-subtle);
  overflow-x: auto;
}

.terminal-tab {
  padding: 12px 20px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  background: transparent;
  color: var(--text-muted);
  border: none;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.terminal-tab:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.02);
}

.terminal-tab.active {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
  background: rgba(24, 213, 255, 0.04);
}

/* Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--accent-border);
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.4), var(--shadow-glow);
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(24, 213, 255, 0.1);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  border: 1px solid var(--accent-border);
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.card-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  flex: 1;
}

.card-cli {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-dim);
  background: var(--bg-base);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
}

.feature-featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.featured-card {
  background: linear-gradient(135deg, rgba(22, 131, 255, 0.08), rgba(24, 213, 255, 0.04)), var(--bg-card);
  border: 1px solid var(--accent-border);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-blue-glow);
}

/* Tabs System (OS / Code) */
.tab-container {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: 20px 0;
}

.tab-nav {
  display: flex;
  background: rgba(7, 11, 18, 0.8);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0 12px;
}

.tab-btn {
  background: transparent;
  border: none;
  padding: 12px 18px;
  font-size: 0.85rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.tab-btn:hover {
  color: var(--text-main);
}

.tab-btn.active {
  color: var(--accent-cyan);
  border-bottom-color: var(--accent-cyan);
}

.tab-pane {
  display: none;
  padding: 20px;
}

.tab-pane.active {
  display: block;
}

/* Code Snippet Box with Copy Button */
.code-box {
  position: relative;
  background: var(--bg-terminal);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: #E2E8F0;
  overflow-x: auto;
  margin: 14px 0;
}

.code-box code {
  color: #F8FAFC;
  display: block;
  white-space: pre-wrap;
}

.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: all var(--transition-fast);
}

.copy-btn:hover {
  background: rgba(24, 213, 255, 0.15);
  color: var(--accent-cyan);
  border-color: var(--accent-border);
}

.copy-btn.copied {
  background: rgba(16, 185, 129, 0.2);
  color: var(--status-success);
  border-color: var(--status-success);
}

/* Quick Start Timeline */
.timeline {
  position: relative;
  padding-left: 36px;
  margin: 28px 0;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 14px;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary-blue), var(--accent-cyan), var(--border-subtle));
}

.timeline-step {
  position: relative;
  margin-bottom: 36px;
}

.timeline-step:last-child {
  margin-bottom: 0;
}

.step-marker {
  position: absolute;
  left: -36px;
  top: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 2px solid var(--accent-cyan);
  box-shadow: 0 0 10px rgba(24, 213, 255, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--accent-cyan);
}

.step-content {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px;
}

.step-title {
  font-size: 1.15rem;
  margin-bottom: 8px;
  color: var(--text-main);
}

.step-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

/* Searchable CLI Reference */
.cli-search-bar {
  margin-bottom: 24px;
  position: relative;
}

.cli-search-input {
  width: 100%;
  padding: 14px 20px 14px 48px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-size: 0.95rem;
  font-family: var(--font-mono);
  outline: none;
  transition: all var(--transition-fast);
}

.cli-search-input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(24, 213, 255, 0.2);
}

.cli-search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
}

.cli-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px;
  margin-bottom: 18px;
  transition: all var(--transition-fast);
}

.cli-card:hover {
  border-color: var(--accent-border);
}

.cli-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}

.cli-syntax {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--accent-cyan);
  background: rgba(24, 213, 255, 0.08);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--accent-border);
}

.cli-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.05);
  padding: 2px 8px;
  border-radius: 12px;
}

.cli-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.cli-flags {
  list-style: none;
  font-size: 0.85rem;
  margin-top: 12px;
  border-top: 1px solid var(--border-subtle);
  padding-top: 12px;
}

.cli-flag-item {
  display: flex;
  gap: 10px;
  margin-bottom: 6px;
  font-family: var(--font-mono);
}

.flag-name {
  color: var(--primary-blue);
  min-width: 140px;
  flex-shrink: 0;
}

.flag-desc {
  color: var(--text-muted);
  font-family: var(--font-sans);
}

/* Callout Alerts */
.alert {
  padding: 18px 22px;
  border-radius: var(--radius-md);
  margin: 22px 0;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  border: 1px solid transparent;
}

.alert-warning {
  background: rgba(245, 158, 11, 0.08);
  border-color: rgba(245, 158, 11, 0.3);
  color: #FDE68A;
}

.alert-warning svg { color: var(--status-warning); flex-shrink: 0; }

.alert-info {
  background: rgba(24, 213, 255, 0.06);
  border-color: var(--accent-border);
  color: #BAE6FD;
}

.alert-info svg { color: var(--accent-cyan); flex-shrink: 0; }

.alert-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 4px;
  color: var(--text-main);
}

.alert-body {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* Interactive Scope Visualizer */
.scope-tester-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-md);
}

.tester-input-group {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
}

.tester-input {
  flex: 1;
  background: var(--bg-terminal);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 18px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-main);
  outline: none;
  transition: all var(--transition-fast);
}

.tester-input:focus {
  border-color: var(--accent-cyan);
}

.tester-result-box {
  background: var(--bg-terminal);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.result-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 20px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
}

.badge-allowed {
  background: rgba(16, 185, 129, 0.15);
  color: var(--status-success);
  border: 1px solid rgba(16, 185, 129, 0.4);
}

.badge-blocked {
  background: rgba(239, 68, 68, 0.15);
  color: var(--status-error);
  border: 1px solid rgba(239, 68, 68, 0.4);
}

.scope-rules-preview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 20px;
}

.rule-column {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 14px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.rule-header {
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

/* Architecture SVG Container */
.arch-diagram-wrapper {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 24px;
  box-shadow: var(--shadow-md);
  overflow-x: auto;
  text-align: center;
}

.arch-svg {
  width: 100%;
  max-width: 900px;
  height: auto;
  display: inline-block;
}

/* Flow line animation */
.data-flow-pulse {
  stroke-dasharray: 6;
  animation: flowLine 25s linear infinite;
}

@keyframes flowLine {
  from { stroke-dashoffset: 500; }
  to { stroke-dashoffset: 0; }
}

/* Roadmap Grid */
.roadmap-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.roadmap-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
}

.roadmap-card.implemented {
  border-top: 3px solid var(--status-success);
}

.roadmap-card.planned {
  border-top: 3px solid var(--primary-blue);
}

.roadmap-list {
  list-style: none;
  margin-top: 16px;
}

.roadmap-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  font-size: 0.92rem;
  color: var(--text-muted);
}

.roadmap-item:last-child {
  border-bottom: none;
}

.roadmap-icon-checked {
  color: var(--status-success);
}

.roadmap-icon-planned {
  color: var(--accent-cyan);
}

/* FAQ Accordion */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 24px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--border-medium);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-family: inherit;
}

.faq-icon {
  transition: transform var(--transition-normal);
  color: var(--accent-cyan);
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
  padding: 0 24px;
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

.faq-item.open .faq-answer {
  max-height: 600px;
  padding-bottom: 24px;
  transition: max-height 0.4s ease-in-out;
}

/* Site Footer */
.site-footer {
  background: #04070D;
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 36px;
  margin-top: 60px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand-desc {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-top: 12px;
  max-width: 320px;
}

.footer-col-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-main);
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-link {
  color: var(--text-muted);
  font-size: 0.88rem;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--accent-cyan);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.82rem;
  color: var(--text-dim);
}

.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--accent-cyan);
  color: var(--bg-base);
  box-shadow: var(--shadow-glow);
}

/* Accessibility: Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* Responsive Media Queries */
@media (max-width: 1200px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero-title {
    font-size: 2.8rem;
  }
}

@media (max-width: 992px) {
  .docs-layout {
    flex-direction: column;
  }
  
  .docs-sidebar {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: calc(100vh - var(--header-height));
    max-height: none;
    background: var(--bg-base);
    padding: 24px;
    z-index: 990;
    border-right: none;
  }
  
  .docs-sidebar.mobile-open {
    display: block;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .main-nav {
    display: none;
  }
  
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  
  .roadmap-container {
    grid-template-columns: 1fr;
  }
  
  .scope-rules-preview {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .feature-grid, .feature-featured {
    grid-template-columns: 1fr;
  }
  
  .hero-title {
    font-size: 2.1rem;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .hero-cta .btn {
    width: 100%;
  }
  
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
  
  .tester-input-group {
    flex-direction: column;
  }
}