/* ==========================================================================
   DBAnchor Design System & Core Stylesheet
   Safe Universal Database Developer-Experience Middleware & Diagnostics for PostgreSQL
   ========================================================================== */

:root {
  /* Color Palette - Dark First Professional Infrastructure Theme */
  --bg: #070b12;
  --bg-subtle: #0a0f19;
  --surface: #0d131d;
  --surface-2: #111a26;
  --surface-3: #162232;
  --surface-hover: #1b2a3d;
  
  --border: #1d2a3a;
  --border-subtle: #15202d;
  --border-light: #2a3d54;
  --border-focus: #4da3ff;
  
  --text: #f4f7fb;
  --text-dim: #cbd5e1;
  --muted: #8b98aa;
  --muted-dark: #586578;
  
  --accent: #4da3ff;
  --accent-hover: #3b8fe8;
  --accent-light: rgba(77, 163, 255, 0.12);
  --accent-glow: rgba(77, 163, 255, 0.25);
  --accent-2: #6ee7ff;
  --accent-2-light: rgba(110, 231, 255, 0.12);
  
  --success: #35d07f;
  --success-light: rgba(53, 208, 127, 0.12);
  --warning: #f5b942;
  --warning-light: rgba(245, 185, 66, 0.12);
  --danger: #ff5f6d;
  --danger-light: rgba(255, 95, 109, 0.12);
  --purple: #a78bfa;
  --purple-light: rgba(167, 139, 250, 0.12);

  --code-bg: #05080e;
  --terminal-bar: #0c121c;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  
  /* Layout & Spacing */
  --container-max: 1240px;
  --container-narrow: 900px;
  --nav-height: 72px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.65);
  --shadow-glow: 0 0 25px rgba(77, 163, 255, 0.15);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.25s ease;
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   CSS Reset & Base Rules
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  color-scheme: dark;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.6;
  font-weight: 400;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Ambient Background Grid */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(77, 163, 255, 0.05) 0%, transparent 60%),
    linear-gradient(to right, rgba(29, 42, 58, 0.15) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(29, 42, 58, 0.15) 1px, transparent 1px);
  background-size: 100% 100%, 48px 48px, 48px 48px;
  pointer-events: none;
  z-index: 0;
}

img, svg {
  display: block;
  max-width: 100%;
}

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

a:hover {
  color: var(--accent-2);
}

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

code, kbd, samp, pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

p code, li code, td code, .inline-code {
  background-color: var(--surface-2);
  color: var(--accent-2);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  font-size: 0.88em;
}

/* Accessibility Focus States */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* Skip to Content for Screen Readers */
.skip-to-content {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--accent);
  color: #000;
  font-weight: 600;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-sm);
  z-index: 9999;
  transition: top var(--transition-fast);
}

.skip-to-content:focus {
  top: 1rem;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
  position: relative;
  z-index: 1;
}

.container-narrow {
  max-width: var(--container-narrow);
}

/* ==========================================================================
   Global Header & Sticky Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  height: var(--nav-height);
  background-color: rgba(7, 11, 18, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

.site-header.scrolled {
  background-color: rgba(7, 11, 18, 0.95);
  border-bottom-color: var(--border-light);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.brand-lockup:hover {
  color: var(--text);
}

.brand-logo-img {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
}

.brand-wordmark {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.brand-wordmark .accent {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-link {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 500;
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--text);
  background-color: var(--surface-2);
}

.nav-link.active {
  color: var(--accent);
  background-color: var(--accent-light);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-install-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--accent-2);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-full);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
  cursor: pointer;
}

.nav-install-badge:hover {
  border-color: var(--accent);
  background-color: var(--surface-3);
}

.nav-install-badge svg {
  width: 14px;
  height: 14px;
  color: var(--muted);
}

.nav-icon-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--muted);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.nav-icon-link:hover {
  color: var(--text);
  background-color: var(--surface-2);
  border-color: var(--border);
}

.nav-icon-link svg {
  width: 18px;
  height: 18px;
}

/* Mobile Hamburger Button */
.mobile-nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--text);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
}

.mobile-nav-toggle svg {
  width: 22px;
  height: 22px;
}

/* Mobile Menu Drawer */
.mobile-nav-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  max-width: 320px;
  height: 100vh;
  background-color: var(--surface);
  border-left: 1px solid var(--border);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  z-index: 1001;
  transition: right var(--transition-smooth);
  box-shadow: var(--shadow-lg);
}

.mobile-nav-drawer.open {
  right: 0;
}

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

.mobile-nav-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  color: var(--muted);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.mobile-nav-close:hover {
  color: var(--text);
  background-color: var(--surface-2);
}

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  list-style: none;
}

.mobile-nav-links .nav-link {
  font-size: 1.05rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  display: block;
}

.mobile-nav-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.mobile-nav-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

/* ==========================================================================
   Buttons & UI Elements
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.65rem 1.35rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  line-height: 1.2;
}

.btn-primary {
  background-color: var(--accent);
  color: #05080e;
  box-shadow: 0 1px 3px rgba(77, 163, 255, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  color: #05080e;
  box-shadow: 0 0 16px rgba(77, 163, 255, 0.4);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background-color: var(--surface-3);
  color: var(--text);
  border-color: var(--border-light);
  transform: translateY(-1px);
}

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

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background-color: var(--accent-light);
}

.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 0.85rem 1.75rem;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

.btn-icon-right svg {
  transition: transform var(--transition-fast);
}

.btn-icon-right:hover svg {
  transform: translateX(3px);
}

/* Eyebrow & Badges */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  background-color: var(--accent-light);
  border: 1px solid rgba(77, 163, 255, 0.25);
  padding: 0.3rem 0.75rem;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.badge-low, .badge-safe {
  background-color: var(--success-light);
  color: var(--success);
  border: 1px solid rgba(53, 208, 127, 0.3);
}

.badge-medium, .badge-warn {
  background-color: var(--warning-light);
  color: var(--warning);
  border: 1px solid rgba(245, 185, 66, 0.3);
}

.badge-high, .badge-danger, .badge-critical {
  background-color: var(--danger-light);
  color: var(--danger);
  border: 1px solid rgba(255, 95, 109, 0.3);
}

.badge-info {
  background-color: var(--accent-light);
  color: var(--accent);
  border: 1px solid rgba(77, 163, 255, 0.3);
}

.badge-purple {
  background-color: var(--purple-light);
  color: var(--purple);
  border: 1px solid rgba(167, 139, 250, 0.3);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero-section {
  padding-top: 4.5rem;
  padding-bottom: 5rem;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-title {
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.035em;
  margin-bottom: 1.25rem;
  color: var(--text);
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, var(--text) 30%, var(--accent) 80%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subline {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--accent-2);
  line-height: 1.5;
  margin-bottom: 1rem;
}

.hero-description {
  font-size: 1.08rem;
  color: var(--text-dim);
  line-height: 1.65;
  margin-bottom: 2rem;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.hero-quick-pip {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background-color: var(--surface);
  border: 1px solid var(--border);
  padding: 0.6rem 1rem;
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text);
}

.hero-quick-pip .prompt-symbol {
  color: var(--muted);
  user-select: none;
}

.hero-quick-pip .copy-btn {
  color: var(--muted);
  padding: 0.2rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast);
}

.hero-quick-pip .copy-btn:hover {
  color: var(--accent);
}

.hero-quick-pip .copy-btn svg {
  width: 16px;
  height: 16px;
}

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

.terminal-header {
  background-color: var(--terminal-bar);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.terminal-dots {
  display: flex;
  align-items: center;
  gap: 6px;
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-red { background-color: #ff5f56; }
.dot-yellow { background-color: #ffbd2e; }
.dot-green { background-color: #27c93f; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.terminal-body {
  padding: 1.25rem 1.25rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.6;
  color: #e2e8f0;
  overflow-x: auto;
}

.terminal-line {
  margin-bottom: 0.35rem;
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  white-space: pre-wrap;
}

.terminal-prompt {
  color: var(--muted);
}

.terminal-cmd {
  color: var(--accent-2);
  font-weight: 600;
}

.terminal-divider {
  border-top: 1px dashed var(--border);
  margin: 0.8rem 0;
}

.terminal-key-val {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 0.5rem;
  margin-bottom: 0.25rem;
}

.terminal-key {
  color: var(--muted);
}

.terminal-val {
  color: var(--text);
  font-weight: 500;
}

.terminal-check-item {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.25rem;
  color: var(--text-dim);
}

.terminal-check-icon {
  color: var(--success);
  font-weight: 700;
}

.terminal-status-ready {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background-color: var(--success-light);
  color: var(--success);
  border: 1px solid rgba(53, 208, 127, 0.3);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  margin-top: 0.5rem;
}

.status-pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--success);
  box-shadow: 0 0 8px var(--success);
  animation: pulseDot 2s infinite ease-in-out;
}

@keyframes pulseDot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

/* ==========================================================================
   Trust & Tech Strip
   ========================================================================== */

.trust-section {
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  background-color: rgba(13, 19, 29, 0.4);
  padding: 2.2rem 0;
}

.trust-header {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 1.5rem;
}

.trust-badges-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.75rem 1.25rem;
}

.trust-item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  background-color: var(--surface);
  border: 1px solid var(--border);
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-dim);
  transition: all var(--transition-fast);
}

.trust-item:hover {
  border-color: var(--border-light);
  color: var(--text);
  background-color: var(--surface-2);
  transform: translateY(-1px);
}

.trust-item-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent);
}

/* ==========================================================================
   Section Layouts & General Components
   ========================================================================== */

.section {
  padding: 5.5rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 3.5rem auto;
}

.section-title {
  font-size: clamp(1.9rem, 3.5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
  color: var(--text);
}

.section-subtitle {
  font-size: 1.08rem;
  color: var(--muted);
  line-height: 1.6;
}

/* Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.cards-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.cards-grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  position: relative;
  display: flex;
  flex-direction: column;
}

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

.card-icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--surface-2);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.card-icon-wrap svg {
  width: 22px;
  height: 22px;
}

.card-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.card-desc {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}

/* Problem Cards Special Styling */
.problem-card {
  border-left: 3px solid var(--danger);
}

.problem-sql-code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background-color: var(--code-bg);
  border: 1px solid rgba(255, 95, 109, 0.2);
  color: var(--danger);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  margin-top: auto;
}

/* Solution Architecture Visual */
.arch-diagram-wrap {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  margin-top: 2rem;
  position: relative;
  overflow: hidden;
}

.arch-flow {
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 680px;
  margin: 0 auto;
  gap: 1.25rem;
}

.arch-node {
  width: 100%;
  max-width: 440px;
  background-color: var(--surface-2);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 1rem 1.5rem;
  text-align: center;
  font-weight: 700;
  color: var(--text);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
}

.arch-node.node-app {
  border-color: #3b82f6;
  background: linear-gradient(180deg, var(--surface-2) 0%, rgba(59, 130, 246, 0.08) 100%);
}

.arch-node.node-db {
  border-color: #38bdf8;
  background: linear-gradient(180deg, var(--surface-2) 0%, rgba(56, 189, 248, 0.08) 100%);
}

.arch-connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--accent);
}

.arch-connector svg {
  width: 20px;
  height: 20px;
}

.arch-middleware-box {
  width: 100%;
  background: linear-gradient(180deg, var(--surface-2) 0%, var(--surface-3) 100%);
  border: 1px solid var(--accent);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem;
  box-shadow: 0 0 25px rgba(77, 163, 255, 0.15);
}

.arch-middleware-title {
  text-align: center;
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
}

.arch-modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
}

.arch-module-chip {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.8rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-dim);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: all var(--transition-fast);
}

.arch-module-chip:hover {
  border-color: var(--accent);
  color: var(--accent-2);
  background-color: var(--accent-light);
}

/* ==========================================================================
   Safety Risk Matrix & Warning Terminal
   ========================================================================== */

.safety-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.5rem;
  align-items: start;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background-color: var(--surface);
}

.risk-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.92rem;
}

.risk-table th {
  background-color: var(--surface-2);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.9rem 1.2rem;
  border-bottom: 1px solid var(--border);
}

.risk-table td {
  padding: 0.9rem 1.2rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-dim);
}

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

.risk-table tr:hover td {
  background-color: rgba(255, 255, 255, 0.02);
}

.risk-table code {
  font-weight: 600;
}

/* Safety Warning Terminal */
.terminal-warning {
  border-color: rgba(255, 95, 109, 0.4);
  box-shadow: 0 0 30px rgba(255, 95, 109, 0.12);
}

.terminal-warning .terminal-header {
  background-color: #1a0f14;
  border-bottom-color: rgba(255, 95, 109, 0.3);
}

.terminal-danger-title {
  color: var(--danger);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.danger-tag {
  background-color: var(--danger-light);
  color: var(--danger);
  border: 1px solid rgba(255, 95, 109, 0.4);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  display: inline-block;
  margin: 0.4rem 0;
}

/* ==========================================================================
   Code Blocks & Tabbed Snippets
   ========================================================================== */

.code-box {
  background-color: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
}

.code-header {
  background-color: var(--surface-2);
  border-bottom: 1px solid var(--border);
  padding: 0.5rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.code-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.copy-code-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--muted);
  background-color: var(--surface);
  border: 1px solid var(--border);
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.copy-code-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.copy-code-btn svg {
  width: 13px;
  height: 13px;
}

pre.code-content {
  padding: 1.25rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  line-height: 1.65;
  color: #e2e8f0;
  margin: 0;
}

/* Syntax Highlighting Helpers */
.hl-kw { color: #f43f5e; font-weight: 600; }
.hl-fn { color: #38bdf8; }
.hl-str { color: #34d399; }
.hl-cmt { color: #64748b; font-style: italic; }
.hl-var { color: #f59e0b; }
.hl-typ { color: #c084fc; }

/* Tabs Component */
.tabs-container {
  margin-top: 1.5rem;
}

.tabs-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1rem;
  overflow-x: auto;
}

.tab-btn {
  padding: 0.6rem 1.2rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--muted);
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background-color: var(--accent-light);
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.tab-pane {
  display: none;
}

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

/* ==========================================================================
   Quickstart 3-Step Section
   ========================================================================== */

.quickstart-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.step-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  display: flex;
  flex-direction: column;
}

.step-number {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.75rem;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.step-title {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.step-desc {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 1.25rem;
}

.step-card .code-box {
  margin-top: auto;
}

/* ==========================================================================
   Error Intelligence Section
   ========================================================================== */

.error-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.error-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: all var(--transition-fast);
}

.error-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}

.error-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--danger);
}

.error-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.error-explanation {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.5;
  margin-bottom: 0.75rem;
}

.error-fix {
  font-size: 0.84rem;
  color: var(--success);
  background-color: var(--success-light);
  border: 1px solid rgba(53, 208, 127, 0.25);
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
}

/* ==========================================================================
   CI/CD Pipeline Flow
   ========================================================================== */

.cicd-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2.5rem;
  align-items: center;
}

.pipeline-flow-vertical {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 400px;
  margin: 0 auto;
}

.pipeline-step {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.92rem;
  font-weight: 600;
}

.pipeline-step.step-pass {
  border-color: rgba(53, 208, 127, 0.4);
  background-color: rgba(53, 208, 127, 0.05);
}

.pipeline-arrow {
  text-align: center;
  color: var(--muted);
}

.pipeline-arrow svg {
  width: 16px;
  height: 16px;
  margin: 0 auto;
}

/* ==========================================================================
   DX Comparison Cards
   ========================================================================== */

.dx-comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.dx-card {
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  border: 1px solid var(--border);
}

.dx-card-bad {
  background-color: rgba(255, 95, 109, 0.03);
  border-color: rgba(255, 95, 109, 0.25);
}

.dx-card-good {
  background-color: rgba(77, 163, 255, 0.04);
  border-color: rgba(77, 163, 255, 0.35);
  box-shadow: var(--shadow-glow);
}

.dx-card-title {
  font-size: 1.3rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.dx-card-bad .dx-card-title {
  color: var(--danger);
}

.dx-card-good .dx-card-title {
  color: var(--accent);
}

.dx-step-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.dx-step-item {
  background-color: var(--surface);
  border: 1px solid var(--border);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.dx-step-arrow {
  text-align: center;
  color: var(--muted);
  margin: -0.25rem 0;
}

/* ==========================================================================
   Interactive CLI Reference Table & Search
   ========================================================================== */

.cli-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  background-color: var(--surface);
  border: 1px solid var(--border);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-lg);
}

.cli-search-box {
  position: relative;
  flex: 1;
  min-width: 260px;
}

.cli-search-input {
  width: 100%;
  background-color: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  padding: 0.65rem 1rem 0.65rem 2.5rem;
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition-fast);
}

.cli-search-input:focus {
  border-color: var(--accent);
}

.cli-search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  width: 16px;
  height: 16px;
  pointer-events: none;
}

.cli-tags-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.cli-tag-btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-full);
  background-color: var(--surface-2);
  color: var(--muted);
  border: 1px solid var(--border);
  transition: all var(--transition-fast);
}

.cli-tag-btn:hover {
  color: var(--text);
  border-color: var(--border-light);
}

.cli-tag-btn.active {
  background-color: var(--accent-light);
  color: var(--accent);
  border-color: var(--accent);
}

.cli-commands-list {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.cli-cmd-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.75rem;
  transition: border-color var(--transition-fast);
}

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

.cli-cmd-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.cli-cmd-title {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent-2);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.cli-cmd-purpose {
  font-size: 0.95rem;
  color: var(--text-dim);
  line-height: 1.5;
  margin-bottom: 1rem;
}

/* ==========================================================================
   Documentation Layout (Docs Page)
   ========================================================================== */

.docs-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 3rem;
  padding: 3rem 0 6rem 0;
  align-items: start;
}

.docs-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + 2rem);
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.25rem;
  max-height: calc(100vh - var(--nav-height) - 4rem);
  overflow-y: auto;
}

.docs-nav-group {
  margin-bottom: 1.5rem;
}

.docs-nav-group:last-child {
  margin-bottom: 0;
}

.docs-nav-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 0.6rem;
  padding-left: 0.5rem;
}

.docs-nav-items {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.docs-nav-link {
  display: block;
  padding: 0.4rem 0.65rem;
  font-size: 0.9rem;
  color: var(--text-dim);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.docs-nav-link:hover {
  color: var(--text);
  background-color: var(--surface-2);
}

.docs-nav-link.active {
  color: var(--accent);
  background-color: var(--accent-light);
  font-weight: 600;
}

.docs-main-content {
  max-width: 860px;
}

.docs-section {
  margin-bottom: 4rem;
  scroll-margin-top: calc(var(--nav-height) + 2rem);
}

.docs-section h2 {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  color: var(--text);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.75rem;
}

.docs-section h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin: 1.75rem 0 0.75rem 0;
  color: var(--text);
}

.docs-section p {
  color: var(--text-dim);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.docs-callout {
  border-left: 4px solid var(--accent);
  background-color: var(--surface-2);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  font-size: 0.95rem;
  color: var(--text-dim);
}

.docs-callout-warning {
  border-left-color: var(--warning);
  background-color: rgba(245, 185, 66, 0.05);
}

/* ==========================================================================
   FAQ Accordions
   ========================================================================== */

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item[open] {
  border-color: var(--border-light);
  background-color: var(--surface-2);
}

.faq-summary {
  padding: 1.25rem 1.5rem;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  user-select: none;
}

.faq-summary::-webkit-details-marker {
  display: none;
}

.faq-summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.3rem;
  color: var(--muted);
  transition: transform var(--transition-fast);
}

.faq-item[open] .faq-summary::after {
  content: "−";
  color: var(--accent);
}

.faq-content {
  padding: 0 1.5rem 1.5rem 1.5rem;
  color: var(--text-dim);
  font-size: 0.98rem;
  line-height: 1.65;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1rem;
}

/* ==========================================================================
   Open Source Community Banner
   ========================================================================== */

.oss-banner {
  background: radial-gradient(circle at 50% 50%, var(--surface-2) 0%, var(--surface) 100%);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2rem;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-glow);
}

.oss-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 1rem;
  color: var(--text);
}

.oss-desc {
  max-width: 600px;
  margin: 0 auto 2rem auto;
  color: var(--muted);
  font-size: 1.05rem;
}

.oss-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

/* ==========================================================================
   Global Footer
   ========================================================================== */

.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border);
  background-color: #04070c;
  padding: 4.5rem 0 2.5rem 0;
  position: relative;
  z-index: 1;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-tagline {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
  margin-top: 1rem;
  margin-bottom: 1.5rem;
  max-width: 320px;
}

.footer-heading {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text);
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  color: var(--muted);
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.footer-bottom a {
  color: var(--muted);
}

.footer-bottom a:hover {
  color: var(--accent);
}

/* ==========================================================================
   Toast Notification Component
   ========================================================================== */

.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  background-color: var(--surface-2);
  border: 1px solid var(--accent);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg), 0 0 15px rgba(77, 163, 255, 0.2);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  transform: translateY(20px);
  opacity: 0;
  transition: all var(--transition-base);
  pointer-events: auto;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

.toast svg {
  color: var(--success);
  width: 16px;
  height: 16px;
}

/* Back to top button */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  left: 2rem;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background-color: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  z-index: 990;
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-base);
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.back-to-top:hover {
  color: var(--accent);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.back-to-top svg {
  width: 18px;
  height: 18px;
}