/* ==========================================================================
   Bamboo Viet — Modern Landing Page Stylesheet
   Color System, Dark/Light Themes, Glassmorphism, Micro-animations & Layout
   ========================================================================== */

:root {
  /* Color Tokens: Bamboo Green Accent */
  --primary: #10b981;
  --primary-hover: #059669;
  --primary-light: #34d399;
  --primary-dark: #047857;
  --primary-glow: rgba(16, 185, 129, 0.25);

  /* Dark Theme (Default) */
  --bg-body: #090d16;
  --bg-surface: #0f172a;
  --bg-surface-elevated: #1e293b;
  --bg-card: rgba(15, 23, 42, 0.7);
  --bg-card-hover: rgba(30, 41, 59, 0.85);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(16, 185, 129, 0.35);
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;
  
  --header-bg: rgba(9, 13, 22, 0.82);
  --code-bg: #050811;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px var(--primary-glow);
  
  /* Typography */
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Transitions */
  --ease-spring: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

[data-theme="light"] {
  --bg-body: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: #ffffff;
  
  --border-subtle: rgba(0, 0, 0, 0.08);
  --border-highlight: rgba(16, 185, 129, 0.4);
  
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-subtle: #94a3b8;
  
  --header-bg: rgba(248, 250, 252, 0.88);
  --code-bg: #1e293b;
  
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 35px rgba(16, 185, 129, 0.18);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  -webkit-font-smoothing: antialiased;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

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

/* ==========================================================================
   Background Glow Effects
   ========================================================================== */
.bg-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: -1;
  opacity: 0.45;
  animation: floatOrb 12s ease-in-out infinite alternate;
}

.bg-glow-1 {
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, #10b981 0%, rgba(16, 185, 129, 0) 70%);
  top: 5%;
  left: 10%;
}

.bg-glow-2 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, #0ea5e9 0%, rgba(14, 165, 233, 0) 70%);
  top: 35%;
  right: 8%;
  animation-delay: -4s;
}

.bg-glow-3 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, #8b5cf6 0%, rgba(139, 92, 246, 0) 70%);
  bottom: 10%;
  left: 20%;
  animation-delay: -8s;
}

@keyframes floatOrb {
  0% { transform: translateY(0px) scale(1); }
  100% { transform: translateY(40px) scale(1.1); }
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--header-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all var(--transition-normal);
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
}

.brand-icon {
  border-radius: 10px;
  transition: transform var(--transition-fast);
}

.brand-logo:hover .brand-icon {
  transform: scale(1.06) rotate(-3deg);
}

.brand-text {
  display: flex;
  align-items: center;
  gap: 8px;
}

.brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

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

.brand-badge {
  font-size: 0.7rem;
  font-weight: 700;
  background: var(--primary-glow);
  color: var(--primary);
  border: 1px solid var(--border-highlight);
  padding: 2px 6px;
  border-radius: 6px;
}

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

.nav-link {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition-fast);
  border-radius: 2px;
}

.nav-link:hover::after {
  width: 100%;
}

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

.theme-toggle-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  border-color: var(--border-highlight);
  background: var(--bg-surface-elevated);
}

[data-theme="dark"] .sun-icon { display: block; }
[data-theme="dark"] .moon-icon { display: none; }
[data-theme="light"] .sun-icon { display: none; }
[data-theme="light"] .moon-icon { display: block; }

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: space-around;
  width: 38px;
  height: 38px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 8px;
  cursor: pointer;
}

.mobile-menu-btn span {
  width: 100%;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

/* Mobile Drawer */
.mobile-drawer {
  display: none;
  flex-direction: column;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: 16px 24px;
  gap: 12px;
}

.mobile-drawer.open {
  display: flex;
}

.mobile-nav-link {
  text-decoration: none;
  color: var(--text-main);
  font-size: 1rem;
  font-weight: 500;
  padding: 8px 0;
}

.mobile-nav-link.highlight {
  color: var(--primary);
  font-weight: 600;
}

/* ==========================================================================
   Buttons & UI Elements
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 10px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1.05rem;
  border-radius: 12px;
}

.btn-primary {
  background: var(--primary);
  color: #032014;
  box-shadow: 0 4px 18px var(--primary-glow);
}

.btn-primary:hover {
  background: var(--primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px var(--primary-glow);
}

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

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

.btn-github {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--border-subtle);
  color: var(--text-main);
  padding: 8px 14px;
  font-size: 0.88rem;
}

.btn-github:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--border-highlight);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 600;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 10px var(--primary);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 70px 0 60px;
  text-align: center;
  position: relative;
}

.hero-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 900px;
}

.hero-badge {
  background: var(--bg-surface);
  border: 1px solid var(--border-highlight);
  color: var(--text-main);
  margin-bottom: 24px;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.gradient-text {
  background: linear-gradient(135deg, #10b981 0%, #06b6d4 50%, #3b82f6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 720px;
  margin-bottom: 36px;
}

.hero-desc strong {
  color: var(--text-main);
}

.hero-desc code {
  background: var(--bg-surface-elevated);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.95em;
  color: var(--primary-light);
}

.hero-cta-group {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-metrics {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 16px 28px;
  box-shadow: var(--shadow-sm);
  max-width: 820px;
  width: 100%;
}

.metric-item {
  display: flex;
  align-items: center;
  gap: 12px;
  text-align: left;
}

.metric-icon {
  font-size: 1.5rem;
}

.metric-text {
  display: flex;
  flex-direction: column;
}

.metric-text strong {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-main);
}

.metric-text span {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.metric-divider {
  width: 1px;
  height: 36px;
  background: var(--border-subtle);
}

/* ==========================================================================
   Section Headers
   ========================================================================== */
.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto;
}

/* ==========================================================================
   Interactive Live Playground
   ========================================================================== */
.playground-section {
  padding: 60px 0;
}

.playground-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  max-width: 920px;
  margin: 0 auto;
  transition: border-color var(--transition-fast);
}

.playground-card:focus-within {
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-glow);
}

.playground-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 16px 20px;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
}

.toolbar-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-subtle);
}

.method-selector {
  display: flex;
  align-items: center;
  gap: 8px;
}

.method-btn {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.method-btn.active {
  background: var(--primary);
  color: #032014;
  border-color: var(--primary);
  box-shadow: 0 2px 10px var(--primary-glow);
}

.quick-samples {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.sample-btn {
  background: transparent;
  border: 1px dashed var(--border-subtle);
  color: var(--text-muted);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 0.78rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sample-btn:hover {
  border-color: var(--primary);
  color: var(--primary-light);
  background: var(--primary-glow);
}

.clear-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-subtle);
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 0.82rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.clear-btn:hover {
  color: #ef4444;
  border-color: #ef4444;
}

.playground-input-area {
  padding: 20px;
}

.playground-textarea {
  width: 100%;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 1.25rem;
  line-height: 1.6;
  resize: vertical;
  outline: none;
  min-height: 130px;
}

.playground-textarea::placeholder {
  color: var(--text-subtle);
}

.playground-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  font-size: 0.82rem;
  color: var(--text-subtle);
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
}

/* ==========================================================================
   Features Grid
   ========================================================================== */
.features-section {
  padding: 80px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: 18px;
  padding: 28px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-md);
}

.feature-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.feature-emoji {
  font-size: 1.5rem;
}

.red-to-amber { background: linear-gradient(135deg, rgba(239, 68, 68, 0.2), rgba(245, 158, 11, 0.2)); border: 1px solid rgba(239, 68, 68, 0.3); }
.emerald-to-teal { background: linear-gradient(135deg, rgba(16, 185, 129, 0.2), rgba(20, 184, 166, 0.2)); border: 1px solid rgba(16, 185, 129, 0.3); }
.blue-to-indigo { background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(99, 102, 241, 0.2)); border: 1px solid rgba(59, 130, 246, 0.3); }
.purple-to-pink { background: linear-gradient(135deg, rgba(168, 85, 247, 0.2), rgba(236, 72, 153, 0.2)); border: 1px solid rgba(168, 85, 247, 0.3); }
.amber-to-orange { background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(249, 115, 22, 0.2)); border: 1px solid rgba(245, 158, 11, 0.3); }
.cyan-to-blue { background: linear-gradient(135deg, rgba(6, 182, 212, 0.2), rgba(59, 130, 246, 0.2)); border: 1px solid rgba(6, 182, 212, 0.3); }

.feature-header-text {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.feature-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
}

.status-tag {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
  white-space: nowrap;
}

.tag-fixed {
  background: rgba(16, 185, 129, 0.15);
  color: var(--primary);
  border: 1px solid var(--border-highlight);
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 18px;
  flex-grow: 1;
}

.feature-diff {
  background: var(--code-bg);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.diff-before {
  color: #f87171;
}

.diff-after {
  color: #4ade80;
  font-weight: 600;
}

/* ==========================================================================
   Control Panel Showcase
   ========================================================================== */
.control-panel-section {
  padding: 80px 0;
  background: linear-gradient(180deg, transparent 0%, rgba(16, 185, 129, 0.03) 50%, transparent 100%);
}

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

.control-panel-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.control-panel-info .section-title {
  text-align: left;
}

.control-panel-info .section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
}

.control-panel-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.control-panel-features-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.control-panel-features-list li strong {
  color: var(--text-main);
}

.check-icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--primary-glow);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.terminal-open-hint {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--text-subtle);
  margin-top: 8px;
}

.terminal-open-hint code {
  background: var(--code-bg);
  border: 1px solid var(--border-subtle);
  padding: 4px 10px;
  border-radius: 6px;
  color: var(--primary-light);
  font-weight: 600;
}

/* GUI Mockup Window */
.gui-mockup-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-highlight);
  border-radius: 14px;
  box-shadow: var(--shadow-lg), 0 0 30px var(--primary-glow);
  overflow: hidden;
}

.window-titlebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--bg-surface-elevated);
  border-bottom: 1px solid var(--border-subtle);
}

.window-traffic-lights {
  display: flex;
  gap: 6px;
}

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

.traffic-light.close { background: #ff5f56; }
.traffic-light.minimize { background: #ffbd2e; }
.traffic-light.maximize { background: #27c93f; }

.window-title {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
}

.window-spacer {
  width: 45px;
}

/* GUI Tabs */
.gui-tabs-header {
  display: flex;
  background: var(--bg-surface-elevated);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0 10px;
  gap: 4px;
}

.gui-tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 8px 14px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

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

.gui-tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.gui-tab-panel {
  display: none;
  flex-direction: column;
  gap: 14px;
}

.gui-tab-panel.active {
  display: flex;
}

.gui-hint-text {
  font-size: 0.78rem;
  color: var(--text-subtle);
}

.gui-hint-text tt {
  background: var(--bg-surface-elevated);
  padding: 2px 5px;
  border-radius: 4px;
  color: var(--primary-light);
  font-family: var(--font-mono);
}

.gui-preset-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.preset-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 10px;
  background: var(--bg-surface-elevated);
  border-radius: 6px;
  font-size: 0.8rem;
  color: var(--text-main);
}

.badge-tag {
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 12px;
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  font-weight: 600;
}

.badge-tag.green {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
}

.mock-fuzz-output {
  margin-top: 8px;
  padding: 10px;
  background: var(--code-bg);
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--primary-light);
  line-height: 1.5;
  border: 1px solid var(--border-subtle);
  min-height: 80px;
}

.gui-window-body {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.gui-group-box {
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 14px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.group-box-title {
  position: absolute;
  top: -10px;
  left: 12px;
  background: var(--bg-surface);
  padding: 0 6px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary);
}

.gui-form-row {
  display: grid;
  grid-template-columns: 110px 1fr;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
}

.gui-form-row label {
  color: var(--text-muted);
}

.gui-select {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 0.85rem;
  outline: none;
}

.gui-checkbox-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  font-size: 0.82rem;
}

.gui-checkbox {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  cursor: pointer;
}

.gui-checkbox.full-width {
  grid-column: span 2;
}

.gui-checkbox input[type="checkbox"] {
  accent-color: var(--primary);
}

.gui-bottom-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  padding-top: 4px;
}

.gui-btn {
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.gui-btn.primary {
  background: var(--primary);
  color: #032014;
}

.gui-btn.primary:hover {
  background: var(--primary-light);
  transform: translateY(-1px);
}

.gui-btn.secondary {
  background: var(--bg-surface-elevated);
  border-color: var(--border-subtle);
  color: var(--text-main);
}

.gui-btn.secondary:hover {
  border-color: var(--border-highlight);
  color: var(--primary-light);
}

/* ==========================================================================
   Installation Section
   ========================================================================== */
.install-section {
  padding: 80px 0;
}

.install-container {
  max-width: 900px;
  margin: 0 auto;
}

.distro-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.distro-tab-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.distro-tab-btn:hover {
  background: var(--bg-surface-elevated);
  color: var(--text-main);
}

.distro-tab-btn.active {
  background: var(--primary);
  color: #032014;
  border-color: var(--primary);
  box-shadow: 0 4px 14px var(--primary-glow);
}

.terminal-box {
  background: var(--code-bg);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  margin-bottom: 32px;
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border-subtle);
}

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

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

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

.terminal-title {
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: var(--text-subtle);
}

.copy-cmd-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.copy-cmd-btn:hover {
  background: var(--primary);
  color: #032014;
  border-color: var(--primary);
}

.terminal-content {
  padding: 20px;
  overflow-x: auto;
}

.terminal-content pre {
  margin: 0;
}

.terminal-content code {
  color: #e2e8f0;
  font-size: 0.95rem;
  line-height: 1.7;
}

.post-install-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.step-num {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--primary-glow);
  color: var(--primary);
  border: 1px solid var(--border-highlight);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
}

.post-card h4 {
  font-size: 1rem;
  color: var(--text-main);
}

.post-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.post-card code {
  background: var(--bg-surface-elevated);
  padding: 2px 5px;
  border-radius: 4px;
  font-size: 0.82rem;
  color: var(--primary-light);
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.faq-section {
  padding: 80px 0;
}

.faq-accordion {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item.active {
  border-color: var(--border-highlight);
}

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

.faq-chevron {
  transition: transform var(--transition-fast);
  color: var(--text-subtle);
  flex-shrink: 0;
}

.faq-item.active .faq-chevron {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  padding: 0 24px;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}

.faq-answer p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   Community Section
   ========================================================================== */
.community-section {
  padding: 60px 0 80px;
}

.community-card {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.12), rgba(6, 182, 212, 0.08));
  border: 1px solid var(--border-highlight);
  border-radius: 24px;
  padding: 48px 32px;
  text-align: center;
  box-shadow: var(--shadow-glow);
}

.community-content {
  max-width: 650px;
  margin: 0 auto;
}

.community-title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 14px;
}

.community-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.community-btns {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 32px 0;
  background: var(--bg-surface);
}

.footer-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  color: var(--text-main);
}

.footer-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.footer-meta a {
  color: var(--primary);
  text-decoration: none;
}

.footer-meta a:hover {
  text-decoration: underline;
}

/* ==========================================================================
   Toast Notification
   ========================================================================== */
.toast-notification {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-highlight);
  color: var(--text-main);
  padding: 12px 20px;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  z-index: 9999;
  transform: translateY(100px);
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s var(--ease-spring);
}

.toast-notification.show {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.toast-notification svg {
  color: var(--primary);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-title { font-size: 2.8rem; }
  .control-panel-wrapper { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .main-nav { display: none; }
  .mobile-menu-btn { display: flex; }
  .hero-title { font-size: 2.2rem; }
  .hero-desc { font-size: 1.05rem; }
  .hero-metrics { flex-direction: column; gap: 16px; align-items: flex-start; }
  .metric-divider { display: none; }
  .playground-toolbar { flex-direction: column; align-items: flex-start; }
  .footer-container { flex-direction: column; align-items: flex-start; }
}