/* ==========================================================================
   VOLTREX LOADER - MINIMALIST PRECISION DESIGN SYSTEM
   Modern, Sleek, Dark Aesthetic — Clean Lines, Zero Glow, Font Awesome Icons
   ========================================================================== */

:root {
  /* Clean Dark Canvas */
  --bg-primary: #090b10;
  --bg-secondary: #0e1118;
  --bg-tertiary: #141822;
  --bg-card: #11151f;
  --bg-card-hover: #161b27;
  --bg-surface: #181d2a;
  --bg-header: rgba(9, 11, 16, 0.88);

  /* Primary Brand: Clean Solid Crimson */
  --accent-primary: #e53935;
  --accent-primary-hover: #d32f2f;
  --accent-primary-subtle: rgba(229, 57, 53, 0.08);

  /* Secondary Accents: Crisp Solids without Glow */
  --accent-cyan: #0284c7;
  --accent-cyan-subtle: rgba(2, 132, 199, 0.08);
  --accent-green: #10b981;
  --accent-green-subtle: rgba(16, 185, 129, 0.08);
  --accent-amber: #f59e0b;
  --accent-purple: #8b5cf6;
  --accent-win-blue: #0078d7;

  /* Typography Colors */
  --text-main: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-faint: #334155;

  /* Crisp Borders */
  --border-subtle: rgba(255, 255, 255, 0.07);
  --border-medium: rgba(255, 255, 255, 0.12);
  --border-strong: rgba(255, 255, 255, 0.2);
  --border-accent: rgba(229, 57, 53, 0.4);

  /* Minimal Clean Shadows (No Colored Glows) */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.6);

  /* Radii & Timing */
  --radius-xs: 4px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.22s ease;

  /* Typography */
  --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 32px 32px;
}

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

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

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

.container {
  width: 100%;
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: 1220px;
}

/* ==========================================================================
   Minimalist Navigation Bar
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: var(--bg-header);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.site-header.scrolled {
  border-bottom-color: var(--border-medium);
  background: rgba(9, 11, 16, 0.96);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 20px;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-logo-container {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-medium);
  background: #111;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-logo-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand-title {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: #fff;
  white-space: nowrap;
}

.brand-version-badge {
  font-size: 0.68rem;
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  padding: 2px 7px;
  border-radius: var(--radius-full);
  font-weight: 600;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link:hover {
  color: #ffffff;
}

.nav-link i {
  font-size: 0.82rem;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

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

.mobile-only-link {
  display: none;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.btn-github {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 13px;
  border-radius: var(--radius-sm);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-medium);
  color: var(--text-main);
  font-size: 0.82rem;
  font-weight: 600;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-github:hover {
  background: #1c2230;
  border-color: var(--border-strong);
}

.btn-github i {
  font-size: 0.95rem;
}

.github-stars-badge {
  background: rgba(255, 255, 255, 0.06);
  padding: 1px 6px;
  border-radius: var(--radius-xs);
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

.btn-nav-download {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 16px;
  border-radius: var(--radius-sm);
  background: var(--accent-primary);
  color: #fff;
  font-size: 0.84rem;
  font-weight: 700;
  transition: background var(--transition-fast);
  white-space: nowrap;
  box-shadow: none;
}

.btn-nav-download:hover {
  background: var(--accent-primary-hover);
}

.btn-nav-download i {
  font-size: 0.85rem;
}

.mobile-nav-toggle {
  display: none;
  padding: 6px;
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 64px 0 54px;
  position: relative;
  text-align: center;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-medium);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 22px;
}

.hero-pill-tag {
  background: var(--accent-primary);
  color: #fff;
  font-size: 0.68rem;
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.hero-title {
  font-size: clamp(2.2rem, 4.5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 18px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  color: #fff;
}

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

.hero-subtitle {
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 720px;
  margin: 0 auto 32px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.btn-primary-action {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  background: var(--accent-primary);
  color: #fff;
  font-size: 0.96rem;
  font-weight: 700;
  transition: background var(--transition-fast);
  box-shadow: none;
}

.btn-primary-action:hover {
  background: var(--accent-primary-hover);
}

.btn-secondary-action {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 12px 22px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  color: var(--text-main);
  font-size: 0.96rem;
  font-weight: 600;
  transition: all var(--transition-fast);
}

.btn-secondary-action:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
}

.hero-platform-chips {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.platform-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-tertiary);
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.platform-chip i {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Metric Ticker Bar */
.metrics-ticker {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  max-width: 1000px;
  margin: 0 auto 40px;
}

.metric-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  text-align: left;
}

.metric-num {
  font-size: 1.6rem;
  font-weight: 800;
  font-family: var(--font-mono);
  line-height: 1.1;
  margin-bottom: 4px;
}

.metric-num.red { color: var(--accent-primary); }
.metric-num.cyan { color: var(--accent-cyan); }
.metric-num.green { color: var(--accent-green); }
.metric-num.purple { color: var(--accent-purple); }

.metric-label {
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ==========================================================================
   Simulator Window Frame (Minimal & Clean)
   ========================================================================== */
.simulator-wrapper {
  max-width: 1040px;
  margin: 0 auto;
}

.app-window-frame {
  background: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  text-align: left;
}

.app-window-header {
  height: 40px;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  user-select: none;
}

.app-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

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

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

.window-dot.red { background: #ef4444; }
.window-dot.yellow { background: #f59e0b; }
.window-dot.green { background: #10b981; }

.window-app-name {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.window-status-pill {
  font-size: 0.68rem;
  font-family: var(--font-mono);
  background: rgba(16, 185, 129, 0.12);
  color: var(--accent-green);
  border: 1px solid rgba(16, 185, 129, 0.25);
  padding: 1px 7px;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  gap: 5px;
  font-weight: 600;
}

.window-status-pill i {
  font-size: 0.6rem;
}

.app-header-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sim-control-btn {
  padding: 4px 10px;
  border-radius: var(--radius-xs);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.sim-control-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.sim-control-btn.active-red {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #fff;
  font-weight: 600;
}

/* Simulator Body */
.app-window-body {
  display: grid;
  grid-template-columns: 200px 1fr;
  min-height: 440px;
}

.sim-sidebar {
  background: #0b0e14;
  border-right: 1px solid var(--border-subtle);
  padding: 14px 10px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sim-sidebar-group-title {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  padding: 0 8px;
  margin-bottom: 6px;
}

.sim-nav-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 8px;
  border-radius: var(--radius-xs);
  font-size: 0.8rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.sim-nav-item:hover {
  background: rgba(255, 255, 255, 0.03);
  color: #fff;
}

.sim-nav-item.active {
  background: rgba(229, 57, 53, 0.12);
  color: #fff;
  font-weight: 600;
  border-left: 2px solid var(--accent-primary);
}

.sim-nav-left {
  display: flex;
  align-items: center;
  gap: 7px;
}

.sim-nav-left i {
  font-size: 0.78rem;
  width: 14px;
  text-align: center;
}

.sim-nav-count {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.06);
  padding: 1px 5px;
  border-radius: var(--radius-xs);
  color: var(--text-muted);
}

.sim-nav-item.active .sim-nav-count {
  background: var(--accent-primary);
  color: #fff;
}

/* Simulator Content */
.sim-content {
  background: var(--bg-secondary);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.sim-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  flex-wrap: wrap;
  gap: 10px;
}

.sim-speed-meter {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sim-speed-icon-box {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-xs);
  background: var(--accent-cyan-subtle);
  border: 1px solid rgba(2, 132, 199, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  font-size: 0.95rem;
}

.sim-speed-val {
  font-size: 1.25rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #fff;
  line-height: 1;
}

.sim-speed-sub {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.sim-concurrency-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.76rem;
  color: var(--text-secondary);
}

.sim-badge-thread {
  background: rgba(229, 57, 53, 0.1);
  border: 1px solid rgba(229, 57, 53, 0.25);
  color: var(--accent-primary);
  font-weight: 700;
  font-family: var(--font-mono);
  padding: 2px 7px;
  border-radius: var(--radius-xs);
  font-size: 0.72rem;
}

/* Download Card */
.sim-downloads-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sim-download-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}

.sim-dl-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 6px;
}

.sim-dl-info {
  display: flex;
  align-items: center;
  gap: 10px;
}

.sim-file-icon {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-xs);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-amber);
  font-size: 0.85rem;
}

.sim-dl-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
}

.sim-dl-meta {
  font-size: 0.7rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.sim-dl-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sim-action-btn {
  width: 26px;
  height: 26px;
  border-radius: var(--radius-xs);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  transition: all var(--transition-fast);
}

.sim-action-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.sim-progress-bar-container {
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin: 8px 0 6px;
}

.sim-progress-fill {
  height: 100%;
  width: 62.4%;
  background: var(--accent-primary);
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
}

.sim-dl-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

/* Chunk Matrix (Minimal Crisp Grid) */
.sim-chunk-matrix-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
}

.sim-chunk-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.sim-chunk-title {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.sim-chunk-grid {
  display: grid;
  grid-template-columns: repeat(16, 1fr);
  gap: 3px;
}

.chunk-block {
  aspect-ratio: 1;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 2px;
  border: 1px solid transparent;
  transition: background 0.2s ease;
}

.chunk-block.done {
  background: var(--accent-green);
}

.chunk-block.streaming {
  background: var(--accent-primary);
}

.chunk-block.queued {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.1);
}

/* Simulator CTA Bar */
.simulator-cta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-sm);
  padding: 10px 16px;
  margin-top: 12px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  flex-wrap: wrap;
  gap: 10px;
}

.sim-interactive-triggers {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.btn-trigger {
  padding: 6px 12px;
  border-radius: var(--radius-xs);
  font-size: 0.78rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
}

.btn-trigger.primary {
  background: var(--accent-primary);
  color: #fff;
}

.btn-trigger.primary:hover {
  background: var(--accent-primary-hover);
}

.btn-trigger.cyan {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-medium);
  color: var(--text-main);
}

.btn-trigger.cyan:hover {
  background: #1e2636;
  border-color: var(--border-strong);
}

/* ==========================================================================
   Section Headers
   ========================================================================== */
.section {
  padding: 80px 0;
  position: relative;
}

.section-alt {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 48px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  width: fit-content;
  max-width: fit-content;
  align-self: flex-start;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-primary);
  background: var(--accent-primary-subtle);
  padding: 3px 10px;
  border-radius: var(--radius-xs);
  margin-bottom: 12px;
  border: 1px solid rgba(229, 57, 53, 0.2);
}

.section-header .section-tag {
  align-self: center;
  margin-left: auto;
  margin-right: auto;
}

.section-tag.cyan {
  color: var(--accent-cyan);
  background: var(--accent-cyan-subtle);
  border-color: rgba(2, 132, 199, 0.2);
}

.section-tag.green {
  color: var(--accent-green);
  background: var(--accent-green-subtle);
  border-color: rgba(16, 185, 129, 0.2);
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: 12px;
  color: #fff;
}

.section-description {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   Benchmark & Engine Feature
   ========================================================================== */
.engine-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}

.engine-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
}

.engine-title {
  font-size: 1.7rem;
  font-weight: 800;
  line-height: 1.3;
  color: #fff;
}

.engine-lead {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.feature-check-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.feature-check-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.check-icon-circle {
  width: 20px;
  height: 20px;
  border-radius: var(--radius-xs);
  background: var(--accent-green-subtle);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: var(--accent-green);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 3px;
  font-size: 0.7rem;
}

.check-text-group strong {
  color: #fff;
  font-size: 0.92rem;
  display: block;
}

.check-text-group span {
  font-size: 0.84rem;
  color: var(--text-secondary);
}

/* Speed Estimator */
.speed-comparison-card {
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 24px;
}

.slider-group {
  margin-bottom: 20px;
}

.slider-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

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

.slider-value-display {
  font-size: 1.05rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #fff;
}

.custom-range-slider {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--bg-surface);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
}

.custom-range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-primary);
  cursor: pointer;
}

.benchmark-results {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.benchmark-bar-row {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  padding: 12px 14px;
}

.benchmark-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
  font-size: 0.82rem;
}

.benchmark-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
}

.benchmark-time {
  font-family: var(--font-mono);
  font-weight: 700;
}

.benchmark-progress {
  height: 6px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.benchmark-fill-voltrex {
  height: 100%;
  width: 100%;
  background: var(--accent-primary);
}

.benchmark-fill-browser {
  height: 100%;
  width: 100%;
  background: var(--text-muted);
}

/* ==========================================================================
   Features Grid
   ========================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-medium);
}

.feature-icon-wrapper {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-xs);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  font-size: 1.1rem;
  margin-bottom: 16px;
}

.feature-card.red .feature-icon-wrapper { color: var(--accent-primary); }
.feature-card.cyan .feature-icon-wrapper { color: var(--accent-cyan); }
.feature-card.green .feature-icon-wrapper { color: var(--accent-green); }
.feature-card.purple .feature-icon-wrapper { color: var(--accent-purple); }
.feature-card.blue .feature-icon-wrapper { color: var(--accent-win-blue); }
.feature-card.amber .feature-icon-wrapper { color: var(--accent-amber); }

.feature-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #fff;
}

.feature-card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

.feature-badge-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.feature-pill {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  padding: 2px 7px;
  border-radius: var(--radius-xs);
  color: var(--text-muted);
}

/* ==========================================================================
   Browser Extension Showcase
   ========================================================================== */
.extension-showcase {
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 40px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 36px;
  align-items: center;
}

.extension-left {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.extension-title {
  font-size: 1.85rem;
  font-weight: 800;
  line-height: 1.25;
  color: #fff;
}

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

.browser-support-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin: 8px 0;
}

.browser-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  color: var(--text-secondary);
  background: var(--bg-tertiary);
  padding: 5px 10px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-subtle);
}

.browser-pill i {
  font-size: 0.85rem;
}

.browser-pill.edge-store-pill {
  border-color: rgba(0, 120, 215, 0.4);
  background: rgba(0, 120, 215, 0.08);
  color: #fff;
  transition: all var(--transition-fast);
}

.browser-pill.edge-store-pill:hover {
  border-color: #0078d7;
  background: rgba(0, 120, 215, 0.16);
}

.badge-official {
  font-size: 0.62rem;
  font-family: var(--font-mono);
  background: rgba(0, 120, 215, 0.25);
  color: #60a5fa;
  border: 1px solid rgba(0, 120, 215, 0.45);
  padding: 1px 5px;
  border-radius: var(--radius-xs);
  font-weight: 700;
  text-transform: uppercase;
}

.extension-steps-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
}

.extension-steps-title {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-main);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.install-step {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}

.step-num {
  width: 22px;
  height: 22px;
  border-radius: var(--radius-xs);
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  font-size: 0.72rem;
  font-family: var(--font-mono);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}

.step-content strong {
  font-size: 0.85rem;
  color: #fff;
  display: block;
}

.step-content p {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

/* ==========================================================================
   Comparison Table
   ========================================================================== */
.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  background: var(--bg-card);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.comparison-table th, 
.comparison-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.86rem;
}

.comparison-table th {
  background: var(--bg-tertiary);
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.78rem;
}

.comparison-table th.highlight-col,
.comparison-table td.highlight-col {
  background: rgba(229, 57, 53, 0.04);
  border-left: 1px solid rgba(229, 57, 53, 0.15);
  border-right: 1px solid rgba(229, 57, 53, 0.15);
}

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

.feature-name-col {
  font-weight: 600;
  color: #fff;
}

.check-yes {
  color: var(--accent-green);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
}

.check-no {
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ==========================================================================
   Downloads Hub
   ========================================================================== */
.downloads-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 30px;
}

.download-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: border-color var(--transition-fast);
}

.download-card:hover {
  border-color: var(--border-medium);
}

.download-card.featured {
  border-color: var(--border-accent);
}

.download-card.featured::after {
  content: 'RECOMMENDED';
  position: absolute;
  top: -10px;
  right: 18px;
  background: var(--accent-primary);
  color: #fff;
  font-size: 0.62rem;
  font-family: var(--font-mono);
  font-weight: 800;
  letter-spacing: 0.06em;
  padding: 2px 8px;
  border-radius: var(--radius-xs);
}

.card-top {
  margin-bottom: 20px;
}

.os-icon-wrapper {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-xs);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  font-size: 1.15rem;
}

.os-title {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 6px;
  color: #fff;
}

.os-desc {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 16px;
}

.os-specs {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 10px 12px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-xs);
  margin-bottom: 20px;
}

.os-spec-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.74rem;
  color: var(--text-muted);
}

.os-spec-val {
  font-family: var(--font-mono);
  color: var(--text-secondary);
  font-weight: 500;
}

.btn-card-download {
  width: 100%;
  padding: 10px;
  border-radius: var(--radius-xs);
  font-weight: 700;
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  transition: all var(--transition-fast);
  margin-bottom: 8px;
}

.btn-card-download.red {
  background: var(--accent-primary);
  color: #fff;
}

.btn-card-download.red:hover {
  background: var(--accent-primary-hover);
}

.btn-card-download.cyan {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-medium);
  color: #fff;
}

.btn-card-download.cyan:hover {
  background: #1c2230;
  border-color: var(--border-strong);
}

.btn-card-download.blue {
  background: var(--accent-win-blue);
  color: #fff;
}

.btn-card-download.blue:hover {
  background: #1084e3;
}

.card-alt-link {
  text-align: center;
  font-size: 0.72rem;
  color: var(--text-muted);
  display: block;
}

.card-alt-link:hover {
  color: #fff;
}

/* Terminal Snippet Box */
.terminal-box {
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  margin-top: 20px;
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.terminal-title {
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.terminal-code-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: #cbd5e1;
  overflow-x: auto;
}

.btn-copy {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 8px;
  border-radius: var(--radius-xs);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
  font-size: 0.72rem;
  transition: all var(--transition-fast);
}

.btn-copy:hover {
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
}

/* ==========================================================================
   Changelog Minimal Box
   ========================================================================== */
.changelog-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
}

.changelog-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 12px;
}

.changelog-ver-title {
  font-size: 1.15rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
}

.changelog-items {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.changelog-item-card {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  padding: 14px;
}

.changelog-item-badge {
  font-size: 0.65rem;
  font-family: var(--font-mono);
  background: rgba(229, 57, 53, 0.1);
  color: var(--accent-primary);
  padding: 1px 6px;
  border-radius: var(--radius-xs);
  display: inline-block;
  margin-bottom: 6px;
  font-weight: 700;
}

.changelog-item-card strong {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 4px;
  color: #fff;
}

.changelog-item-card p {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ==========================================================================
   FAQ Accordion
   ========================================================================== */
.faq-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
}

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

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

.faq-question {
  width: 100%;
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  text-align: left;
}

.faq-icon-chevron {
  transition: transform var(--transition-normal);
  color: var(--text-muted);
  font-size: 0.8rem;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out, padding 0.3s ease-out;
  padding: 0 18px;
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.6;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding-bottom: 16px;
}

/* ==========================================================================
   Footer CTA Banner
   ========================================================================== */
.footer-cta {
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 40px 24px;
  text-align: center;
  margin-bottom: 50px;
}

.footer-cta-title {
  font-size: clamp(1.6rem, 2.5vw, 2.1rem);
  font-weight: 800;
  margin-bottom: 10px;
  color: #fff;
}

.footer-cta-sub {
  font-size: 0.95rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 24px;
}

/* ==========================================================================
   Site Footer
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-secondary);
  padding: 44px 0 24px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 32px;
}

.footer-brand-desc {
  color: var(--text-secondary);
  font-size: 0.82rem;
  margin-top: 10px;
  max-width: 300px;
  line-height: 1.55;
}

.footer-col-title {
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #fff;
  margin-bottom: 12px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.scroll-top-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.76rem;
  color: var(--text-secondary);
}

.scroll-top-btn:hover {
  color: #fff;
}

/* ==========================================================================
   Modal & Toast (Minimal)
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
  padding: 16px;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.probe-modal {
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  width: 100%;
  max-width: 520px;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.probe-modal-header {
  padding: 14px 18px;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.probe-input-group {
  display: flex;
  gap: 8px;
}

.probe-input {
  flex: 1;
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xs);
  padding: 8px 12px;
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  outline: none;
}

.probe-input:focus {
  border-color: var(--accent-primary);
}

.probe-result-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xs);
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.probe-result-row {
  display: flex;
  justify-content: space-between;
}

.probe-key { color: var(--text-muted); }
.probe-val { color: var(--accent-green); font-weight: 600; }

.toast-msg {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  color: #fff;
  padding: 10px 16px;
  border-radius: var(--radius-xs);
  font-size: 0.82rem;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 2000;
  transform: translateY(60px);
  opacity: 0;
  transition: all var(--transition-fast);
  pointer-events: none;
  box-shadow: var(--shadow-md);
}

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

/* ==========================================================================
   Apple-Style Sticky Scroll Screenshot Showcase
   ========================================================================== */
.scroll-tour-section {
  position: relative;
  background: var(--bg-primary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.scroll-tour-track {
  height: 380vh;
  position: relative;
}

.scroll-tour-sticky {
  position: sticky;
  top: 76px;
  height: calc(100vh - 90px);
  max-height: 860px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  z-index: 10;
}

.scroll-tour-layout {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 40px;
  align-items: center;
  width: 100%;
}

.scroll-tour-left {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.scroll-tour-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  width: fit-content;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-cyan);
  background: var(--accent-cyan-subtle);
  border: 1px solid rgba(2, 132, 199, 0.2);
  padding: 3px 10px;
  border-radius: var(--radius-xs);
}

.scroll-tour-heading {
  font-size: clamp(1.75rem, 2.6vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.22;
  color: #fff;
}

.scroll-steps-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.scroll-step-item {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.scroll-step-item:hover {
  background: rgba(255, 255, 255, 0.02);
}

.scroll-step-item.active {
  background: var(--bg-card);
  border-color: var(--border-medium);
  border-left: 3px solid var(--accent-primary);
}

.scroll-step-meta {
  display: flex;
  align-items: center;
  gap: 8px;
}

.scroll-step-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
}

.scroll-step-item.active .scroll-step-num {
  color: var(--accent-primary);
}

.scroll-step-title {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.scroll-step-item.active .scroll-step-title {
  color: #ffffff;
}

.scroll-step-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
  display: none;
}

.scroll-step-item.active .scroll-step-desc {
  display: block;
  color: var(--text-secondary);
}

.scroll-tour-progress-bar {
  width: 100%;
  height: 3px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-top: 4px;
}

.scroll-tour-progress-fill {
  height: 100%;
  width: 20%;
  background: var(--accent-primary);
  border-radius: var(--radius-full);
  transition: width 0.15s ease-out;
}

/* Right Stage: Desktop Window Mockup */
.scroll-tour-stage {
  width: 100%;
}

.tour-window-frame {
  background: var(--bg-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  width: 100%;
}

.tour-window-header {
  height: 38px;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  user-select: none;
}

.tour-window-title {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.tour-screen-stack {
  position: relative;
  aspect-ratio: 16 / 10.5;
  background: #090c12;
  overflow: hidden;
}

.tour-screen-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transform: scale(0.97);
  transition: opacity 0.45s cubic-bezier(0.2, 0, 0, 1), transform 0.45s cubic-bezier(0.2, 0, 0, 1);
  pointer-events: none;
}

.tour-screen-slide.active {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
  z-index: 2;
}

.tour-screen-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top left;
  background: #0a0d14;
  display: block;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
  .scroll-tour-layout {
    grid-template-columns: 340px 1fr;
    gap: 28px;
  }
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .downloads-grid {
    grid-template-columns: 1fr;
  }
  .engine-grid {
    grid-template-columns: 1fr;
  }
  .extension-showcase {
    grid-template-columns: 1fr;
    padding: 28px;
  }
  .changelog-items {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 900px) {
  .scroll-tour-track {
    height: auto;
  }
  .scroll-tour-sticky {
    position: relative;
    top: 0;
    height: auto;
    max-height: none;
    padding: 24px 0;
  }
  .scroll-tour-layout {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }
  .tour-preview-col {
    order: 1;
    width: 100%;
  }
  .scroll-steps-col {
    order: 2;
    width: 100%;
  }
  .scroll-steps-list {
    gap: 8px;
  }
  .scroll-step-item {
    padding: 12px 14px;
    cursor: pointer;
  }
  .scroll-step-desc {
    display: block;
    font-size: 0.82rem;
    line-height: 1.5;
  }
  .tour-window-frame {
    border-radius: var(--radius-sm);
  }
  .tour-window-header {
    padding: 8px 12px;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
  .section {
    padding: 56px 0;
  }

  /* Header & Mobile Nav Drawer */
  .site-header {
    height: 60px;
  }
  .nav-inner {
    height: 60px;
    gap: 8px;
  }
  .brand-title {
    font-size: 0.95rem;
  }
  .brand-version-badge {
    display: none;
  }
  .nav-actions {
    gap: 8px;
  }
  .nav-actions .btn-github {
    display: none;
  }
  .btn-nav-download {
    padding: 6px 12px;
    font-size: 0.8rem;
    gap: 5px;
  }
  .mobile-nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-xs);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-subtle);
    color: var(--text-main);
    font-size: 1.05rem;
    cursor: pointer;
    flex-shrink: 0;
  }
  .mobile-nav-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
  }

  .nav-links {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: rgba(13, 17, 24, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 20px 24px;
    gap: 8px;
    border-bottom: 1px solid var(--border-medium);
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.85);
    display: none;
    z-index: 99;
  }
  .nav-links.open {
    display: flex;
    animation: mobileNavFadeIn 0.2s ease forwards;
  }
  .nav-link {
    font-size: 0.98rem;
    font-weight: 600;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    color: var(--text-main);
    border: 1px solid transparent;
    display: flex;
    align-items: center;
    gap: 10px;
  }
  .nav-link:hover, .nav-link:active {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--border-subtle);
    color: #fff;
  }
  .mobile-only-link {
    display: block;
    margin-top: 6px;
    border-top: 1px solid var(--border-subtle);
    padding-top: 10px;
  }

  /* Hero Section */
  .hero-section {
    padding: 38px 0 28px;
  }
  .hero-pill-badge {
    font-size: 0.72rem;
    padding: 4px 10px;
    margin-bottom: 16px;
    max-width: 100%;
    white-space: normal;
    line-height: 1.35;
    text-align: center;
    display: inline-flex;
    flex-wrap: wrap;
    justify-content: center;
  }
  .hero-title {
    font-size: clamp(1.85rem, 6.8vw, 2.5rem);
    margin-bottom: 14px;
    letter-spacing: -0.02em;
  }
  .hero-subtitle {
    font-size: 0.92rem;
    line-height: 1.55;
    margin-bottom: 22px;
  }
  .hero-cta-group {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    max-width: 320px;
    margin: 0 auto 20px;
    gap: 10px;
  }
  .btn-primary-action, .btn-secondary-action {
    width: 100%;
    justify-content: center;
    padding: 12px 18px;
  }
  .platform-pills {
    gap: 6px;
  }
  .platform-pill {
    font-size: 0.72rem;
    padding: 4px 8px;
  }

  /* Simulator */
  .app-window-body {
    grid-template-columns: 1fr;
  }
  .sim-sidebar {
    display: none;
  }
  .app-window-header {
    height: auto;
    padding: 10px 12px;
    flex-wrap: wrap;
    gap: 8px;
  }
  .app-header-left {
    flex-wrap: wrap;
    gap: 8px;
  }
  .app-header-controls {
    width: 100%;
    justify-content: space-between;
    gap: 8px;
  }
  .sim-control-btn {
    flex: 1;
    justify-content: center;
    padding: 6px 8px;
    font-size: 0.74rem;
  }
  .metrics-ticker {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }
  .metric-ticker-item {
    padding: 8px 10px;
  }
  .metric-ticker-val {
    font-size: 1.1rem;
  }
  .sim-chunk-grid {
    grid-template-columns: repeat(8, 1fr);
    gap: 3px;
  }
  .sim-chunk-cell {
    height: 22px;
    font-size: 0.58rem;
  }
  .sim-stats-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  /* Features & Engine */
  .features-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .feature-card {
    padding: 20px 16px;
  }
  .engine-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .benchmark-bar-row {
    flex-wrap: wrap;
    gap: 6px;
  }
  .benchmark-label {
    min-width: 100%;
  }

  /* Extension & Table */
  .extension-showcase {
    grid-template-columns: 1fr;
    padding: 20px 16px;
    gap: 20px;
  }
  .table-wrapper {
    -webkit-overflow-scrolling: touch;
  }

  /* Downloads & Terminal */
  .downloads-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .download-card {
    padding: 22px 18px;
  }
  .terminal-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
  .terminal-code-row {
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
  }
  .terminal-code-row code {
    white-space: nowrap;
    overflow-x: auto;
    padding: 4px 0;
    font-size: 0.74rem;
  }
  .terminal-code-row .btn-copy {
    align-self: flex-end;
  }

  /* Changelog & FAQ */
  .changelog-box {
    padding: 18px 16px;
  }
  .changelog-header-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .changelog-items {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .faq-question {
    padding: 12px 14px;
    font-size: 0.9rem;
  }
  .faq-answer {
    padding: 0 14px;
    font-size: 0.85rem;
  }
  .faq-item.open .faq-answer {
    padding-bottom: 14px;
  }

  /* Footer CTA & Footer */
  .footer-cta {
    padding: 28px 16px;
    margin-bottom: 30px;
  }
  .footer-cta-title {
    font-size: 1.5rem;
  }
  .footer-cta-sub {
    font-size: 0.88rem;
    margin-bottom: 18px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 12px;
  }
}

@media (max-width: 400px) {
  .brand-title {
    font-size: 0.88rem;
  }
  .brand-logo-container {
    width: 28px;
    height: 28px;
  }
  .btn-nav-download {
    padding: 6px 9px;
    font-size: 0.74rem;
  }
}

@keyframes mobileNavFadeIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}