/* ===================================================================
   E-Helper Showcase & Portal — Official Design System & Styles
   Aesthetic: Precision Stealth & Hardware Telemetry (Subtle Ambient Glow)
   Standards: WCAG AA, Fluid Responsive, 0-Bloat Vanilla CSS
   =================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Dark Theme (Default) */
  --bg-body: #07090e;
  --bg-surface: #0d121d;
  --bg-card: rgba(16, 22, 35, 0.85);
  --bg-card-hover: rgba(24, 33, 52, 0.95);
  --bg-input: #141a29;
  --bg-glass: rgba(13, 18, 29, 0.85);

  /* Specific Simulator Surfaces for Dark Mode */
  --sim-app-bg: #141824;
  --sim-app-border: #263249;
  --sim-tile-bg: #1a2030;
  --sim-tile-hover: #222b40;
  --sim-chassis-bg: #090c14;
  --sim-deck-bg: #0d111a;
  --sim-key-bg: #161d2b;
  --sim-key-border: rgba(255, 255, 255, 0.12);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.15);
  --border-focus: #00f0ff;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #07090e;

  /* Brand Accents */
  --accent-cyan: #00f0ff;
  --accent-cyan-glow: rgba(0, 240, 255, 0.25);
  --accent-blue: #0284c7;
  --accent-emerald: #10b981;
  --accent-emerald-glow: rgba(16, 185, 129, 0.25);
  --accent-amber: #f59e0b;
  --accent-rose: #ef4444;
  --accent-purple: #8b5cf6;

  /* Elevation Shadows */
  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.55);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.7);
  --shadow-glow: 0 0 35px var(--accent-cyan-glow);

  /* Radius Personality */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 22px;
  --radius-full: 9999px;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 70px;

  /* Typography */
  --font-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', Consolas, monospace;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

  /* Simulator Light Mode Surfaces */
  --sim-app-bg: #ffffff;
  --sim-app-border: #cbd5e1;
  --sim-tile-bg: #f8fafc;
  --sim-tile-hover: #f1f5f9;
  --sim-chassis-bg: #ffffff;
  --sim-deck-bg: #0d111a; /* Dark keyboard bed remains for vivid LED contrast */
  --sim-key-bg: #161d2b;
  --sim-key-border: rgba(255, 255, 255, 0.12);

  --border-subtle: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-focus: #0284c7;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --accent-cyan: #0284c7;
  --accent-cyan-glow: rgba(2, 132, 199, 0.2);
  --accent-emerald: #059669;
  --accent-emerald-glow: rgba(5, 150, 105, 0.2);

  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 10px 25px rgba(15, 23, 42, 0.07);
  --shadow-lg: 0 20px 45px rgba(15, 23, 42, 0.1);
  --shadow-glow: 0 0 25px rgba(2, 132, 199, 0.15);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 20px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 15px;
  overflow-x: hidden;
  /* Ambient Ethereal Glow Background (Eye-friendly & Subtle) */
  background-image: 
    radial-gradient(circle 650px at 15% 10%, rgba(0, 240, 255, 0.08), transparent 80%),
    radial-gradient(circle 550px at 85% 25%, rgba(16, 185, 129, 0.06), transparent 75%),
    radial-gradient(circle 750px at 50% 60%, rgba(2, 132, 199, 0.04), transparent 80%),
    radial-gradient(circle 600px at 80% 90%, rgba(0, 240, 255, 0.05), transparent 75%);
  background-attachment: fixed;
  min-height: 100vh;
}

/* Smooth, Unified Theme Transitions across all interactive and surface blocks */
body,
.site-header,
.hero-section,
.hero-pill,
.stats-strip,
.stat-item,
.simulator-section,
.simulator-container,
.virtual-app-window,
.laptop-chassis-card,
.gauge-card,
.simulator-explainer-banner,
.comparison-section,
.comparison-table-wrapper,
.comparison-table th,
.comparison-table td,
.features-section,
.feature-card,
.feature-icon-wrapper,
.guide-section,
.step-card,
.step-tip,
.hardware-section,
.hardware-card-wrapper,
.model-chip,
.changelog-section,
.tab-btn,
.version-card,
.faq-section,
.faq-item,
.site-footer,
.disclaimer-box {
  transition: background-color 0.25s cubic-bezier(0.4, 0, 0.2, 1),
              border-color 0.25s cubic-bezier(0.4, 0, 0.2, 1),
              color 0.25s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] body {
  background-image: 
    radial-gradient(circle 650px at 15% 10%, rgba(2, 132, 199, 0.07), transparent 80%),
    radial-gradient(circle 550px at 85% 25%, rgba(16, 185, 129, 0.05), transparent 75%),
    radial-gradient(circle 750px at 50% 60%, rgba(14, 165, 233, 0.04), transparent 80%),
    radial-gradient(circle 600px at 80% 90%, rgba(2, 132, 199, 0.05), transparent 75%);
}

.tabular-nums {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}

:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 3px;
  border-radius: var(--radius-xs);
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

h1, h2, h3, h4, h5 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 4vw, 3.25rem); }
h2 { font-size: clamp(1.65rem, 3vw, 2.35rem); }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }

p {
  color: var(--text-secondary);
  font-size: 1rem;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* SVG Icon Base */
.icon {
  width: 18px;
  height: 18px;
  stroke-width: 2;
  stroke: currentColor;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
}

.icon-lg {
  width: 24px;
  height: 24px;
}

.icon-sm {
  width: 15px;
  height: 15px;
}

/* ===================================================================
   NAVIGATION BAR
   =================================================================== */
.site-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background-color: var(--bg-glass);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: 100;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

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

.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, #00f0ff, #0284c7);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 12px var(--accent-cyan-glow);
  overflow: hidden;
}

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

.brand-tag {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 7px;
  border-radius: var(--radius-full);
  background: rgba(0, 240, 255, 0.1);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 240, 255, 0.25);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 6px 0;
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-cyan);
  border-radius: var(--radius-full);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.icon-btn {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background-color: var(--bg-card);
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.mobile-menu-btn {
  display: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
  text-decoration: none;
  min-height: 40px;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, #00f0ff 0%, #00b4d8 100%);
  color: #07090e;
  border: none;
  box-shadow: 0 4px 14px rgba(0, 240, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 240, 255, 0.45);
}

.btn-secondary {
  background-color: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-medium);
}

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

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

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

.btn-lg {
  padding: 12px 24px;
  font-size: 1rem;
  border-radius: var(--radius-lg);
  min-height: 48px;
}

/* ===================================================================
   HERO SECTION
   =================================================================== */
.hero-section {
  padding: 55px 0 40px 0;
  position: relative;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  background: rgba(0, 240, 255, 0.08);
  border: 1px solid rgba(0, 240, 255, 0.25);
  color: var(--accent-cyan);
  font-size: 0.82rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-pill .pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 8px var(--accent-emerald);
  animation: pulse 2s infinite;
}

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

.hero-title {
  margin-bottom: 16px;
  max-width: 820px;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #ffffff 40%, #00f0ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="light"] .hero-title .gradient-text {
  background: linear-gradient(135deg, #0f172a 40%, #0284c7 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.1rem;
  max-width: 680px;
  margin-bottom: 30px;
  color: var(--text-secondary);
}

.hero-cta-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 32px;
}

.hero-meta-badge {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.hero-meta-badge span {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Key Metrics Strip */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 40px;
  padding: 20px 24px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.stat-item {
  display: flex;
  flex-direction: column;
  padding: 0 10px;
  border-right: 1px solid var(--border-subtle);
}

.stat-item:last-child {
  border-right: none;
}

.stat-value {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--accent-cyan);
  line-height: 1.1;
  margin-bottom: 4px;
}

.stat-value.green {
  color: var(--accent-emerald);
}

.stat-label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

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

/* ===================================================================
   SIMULATOR SECTION
   =================================================================== */
.simulator-section {
  padding: 70px 0;
  position: relative;
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.25);
  color: var(--accent-emerald);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

.section-header {
  text-align: center;
  max-width: 660px;
  margin: 0 auto 40px auto;
}

.section-header h2 {
  margin-bottom: 10px;
}

.simulator-container {
  display: grid;
  grid-template-columns: 350px 1fr;
  gap: 28px;
  align-items: start;
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  padding: 28px;
  box-shadow: var(--shadow-md);
  position: relative;
  transition: all var(--transition-normal);
}

/* Virtual E-Helper Flyout Window */
.virtual-app-window {
  background-color: var(--sim-app-bg);
  border: 1px solid var(--sim-app-border);
  border-radius: 12px;
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.18);
  color: var(--text-primary);
  font-family: var(--font-main);
  padding: 16px 18px 14px;
  user-select: none;
  position: relative;
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

/* App Title Bar */
.app-title-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 8px;
  margin-bottom: 6px;
}

.app-title-text {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-primary);
}

.app-close-btn {
  width: 22px;
  height: 22px;
  border-radius: 4px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 0.85rem;
  transition: all var(--transition-fast);
}

.app-close-btn:hover {
  background: rgba(239, 68, 68, 0.12);
  color: #ef4444;
}

/* Section Header Rows */
.app-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.80rem;
  margin-top: 10px;
  margin-bottom: 6px;
}

.app-section-header-compact {
  margin-top: 6px;
  margin-bottom: 4px;
}

.app-section-title {
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
}

.app-section-title svg {
  width: 15px;
  height: 15px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

.app-telemetry-pill {
  font-size: 0.74rem;
  color: var(--text-muted);
  font-weight: 500;
}

.app-telemetry-pill strong {
  color: var(--text-primary);
  font-weight: 700;
}

/* Performance Modes 3-Button Grid */
.app-modes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 10px;
}

.mode-tile-btn {
  background: var(--sim-tile-bg);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 10px 4px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.mode-tile-btn:hover {
  background: var(--sim-tile-hover);
  border-color: var(--border-medium);
}

.mode-tile-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
}

.mode-tile-icon svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 1.8;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.mode-tile-label {
  font-size: 0.74rem;
  font-weight: 500;
}

/* Mode active state */
.mode-tile-btn.active {
  background: rgba(0, 240, 255, 0.12);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

/* System Resources Cards (RAM & SSD) */
.app-stats-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-bottom: 8px;
}

.app-stat-box {
  background: var(--sim-tile-bg);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 7px 10px 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.app-stat-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.73rem;
  color: var(--text-muted);
}

.ram-percent-highlight {
  color: var(--accent-emerald);
  font-weight: 700;
}

.ssd-percent-highlight {
  color: var(--accent-cyan);
  font-weight: 700;
}

.app-stat-val {
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--text-primary);
}

.app-progress-bar {
  height: 3px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 3px;
}

.app-progress-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 0.3s ease;
}

#pbRamUsage {
  background: var(--accent-emerald);
}

#pbSsdUsage {
  background: var(--accent-cyan);
}

/* Custom Interactive Dropdown & Color Row */
.app-select-row {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
  position: relative;
}

.custom-dropdown {
  flex: 1.35;
  position: relative;
}

.custom-dropdown-trigger {
  width: 100%;
  height: 34px;
  background: var(--sim-tile-bg);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 0 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  color: var(--text-primary);
  font-size: 0.78rem;
  transition: border-color var(--transition-fast);
}

.custom-dropdown-trigger:hover {
  border-color: var(--border-medium);
}

.custom-dropdown-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.custom-dropdown-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  color: currentColor;
}

.custom-dropdown-icon svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

.custom-dropdown-label {
  font-weight: 500;
}

.custom-dropdown-arrow {
  width: 14px;
  height: 14px;
  stroke: var(--text-muted);
  stroke-width: 2;
  fill: none;
  transition: transform 0.2s ease;
}

.custom-dropdown.open .custom-dropdown-arrow {
  transform: rotate(180deg);
}

.custom-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  width: 100%;
  background: var(--sim-app-bg);
  border: 1px solid var(--sim-app-border);
  border-radius: 6px;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.24);
  padding: 4px;
  z-index: 100;
  flex-direction: column;
  gap: 2px;
}

.custom-dropdown.open .custom-dropdown-menu {
  display: flex;
}

.custom-dropdown-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 0.78rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.custom-dropdown-item svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
  flex-shrink: 0;
}

.custom-dropdown-item:hover {
  background: var(--sim-tile-hover);
}

.custom-dropdown-item.selected {
  background: rgba(0, 240, 255, 0.12);
  border: 1px solid rgba(0, 240, 255, 0.3);
  color: var(--accent-cyan);
  font-weight: 600;
}

/* Color Action Button */
.app-color-trigger {
  flex: 0.75;
  height: 34px;
  background: var(--sim-tile-bg);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.app-color-trigger.disabled {
  color: var(--text-muted);
  cursor: default;
  opacity: 0.7;
}

/* Sliders */
.app-slider-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 0.78rem;
  color: var(--text-primary);
}

.app-slider-label {
  width: 58px;
  flex-shrink: 0;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-primary);
}

.app-slider-track-wrap {
  flex: 1;
  display: flex;
  align-items: center;
}

.app-slider {
  width: 100%;
  -webkit-appearance: none;
  height: 4px;
  border-radius: 2px;
  outline: none;
  cursor: pointer;
  background: var(--border-medium);
  transition: background 0.1s ease;
}

.app-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: #0f172a;
  border: 2px solid #ffffff;
  box-shadow: 0 0 4px rgba(0, 0, 0, 0.5);
  cursor: pointer;
  transition: transform 0.1s ease;
}

.app-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.app-slider::-moz-range-thumb {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: #0f172a;
  border: 2px solid #ffffff;
  box-shadow: 0 0 4px rgba(0, 0, 0, 0.5);
  cursor: pointer;
}

/* Checkbox Row */
.app-checkbox-row {
  margin: 10px 0 14px;
}

.app-checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
}

.app-checkbox-label input[type="checkbox"] {
  width: 14px;
  height: 14px;
  accent-color: #0078d4;
  cursor: pointer;
}

/* 3-Zone Map */
.app-zone-map {
  display: grid;
  grid-template-columns: 1fr 1.2fr 0.9fr;
  gap: 4px;
  padding: 6px;
  background: var(--sim-tile-bg);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  margin-bottom: 10px;
}

.zone-box {
  padding: 6px 4px;
  border-radius: 4px;
  font-size: 0.68rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  border: 1px solid var(--border-subtle);
  transition: all var(--transition-fast);
  color: var(--text-primary);
  background: transparent;
}

.zone-box.active {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan-glow);
}

/* App Footer Nav Matching Screenshot */
.app-footer-nav {
  margin-top: 14px;
  padding-top: 4px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.app-footer-update-link {
  font-size: 0.75rem;
}

.update-version-link {
  color: #f43f5e;
  text-decoration: underline;
  font-weight: 500;
  transition: opacity var(--transition-fast);
}

.update-version-link:hover {
  opacity: 0.8;
}

.app-footer-buttons-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 6px;
}

.app-footer-btn {
  height: 32px;
  background: var(--sim-tile-bg);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.app-footer-btn:hover {
  background: var(--sim-tile-hover);
  border-color: var(--border-medium);
}

.app-footer-btn svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

/* Laptop visualizer chassis card */
.visualizer-pane {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.laptop-chassis-card {
  background: var(--sim-chassis-bg);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.chassis-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.chassis-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-primary);
}

.chassis-telemetry-readout {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.chassis-telemetry-readout strong {
  color: var(--accent-cyan);
}

/* Virtual 3-Zone Keyboard Deck */
.virtual-keyboard-deck {
  background: var(--sim-deck-bg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.6);
}

.keyboard-grid-3zone {
  display: grid;
  grid-template-columns: 1fr 1.25fr 0.95fr;
  gap: 12px;
}

.deck-zone {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 8px;
  padding: 12px 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color var(--transition-fast);
}

.deck-zone-title {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.deck-key-matrix {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
}

#deckZoneRight .deck-key-matrix {
  grid-template-columns: repeat(3, 1fr);
}

.matrix-key {
  height: 18px;
  background-color: #10141f;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 3px;
  transition: all 0.15s ease;
}

.deck-zone > span {
  font-size: 0.68rem;
  color: var(--text-muted);
}

/* Hardware Telemetry Dials Row */
.telemetry-gauges-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 14px;
}

.gauge-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.gauge-icon-ring {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(0, 240, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  flex-shrink: 0;
}

.gauge-icon-ring svg {
  width: 16px;
  height: 16px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

.gauge-icon-ring.spinning {
  animation: spinFan 1.2s linear infinite;
}

@keyframes spinFan {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.gauge-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.gauge-name {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.gauge-reading {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-primary);
}

.simulator-explainer-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(0, 240, 255, 0.06);
  border: 1px solid rgba(0, 240, 255, 0.2);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

/* ===================================================================
   LIGHT THEME OVERRIDES (EXACT REPLICA OF USER'S SCREENSHOT)
   =================================================================== */
[data-theme="light"] .virtual-app-window {
  background-color: #ffffff;
  border-color: #e2e8f0;
  color: #0f172a;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}

[data-theme="light"] .virtual-app-window .app-title-text,
[data-theme="light"] .virtual-app-window .app-section-title,
[data-theme="light"] .virtual-app-window .app-stat-val,
[data-theme="light"] .virtual-app-window .app-slider-label,
[data-theme="light"] .virtual-app-window .app-checkbox-label {
  color: #0f172a !important;
}

[data-theme="light"] .virtual-app-window .app-telemetry-pill,
[data-theme="light"] .virtual-app-window .app-stat-head {
  color: #64748b !important;
}

[data-theme="light"] .virtual-app-window .app-telemetry-pill strong {
  color: #0f172a !important;
}

[data-theme="light"] .virtual-app-window .mode-tile-btn {
  background: #ffffff;
  border-color: #e2e8f0;
  color: #0f172a;
}

[data-theme="light"] .virtual-app-window .mode-tile-btn:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
}

/* Active performance mode in light theme matches screenshot */
[data-theme="light"] .virtual-app-window .mode-tile-btn.active#btnOffice {
  background: #ecfdf5;
  border-color: #10b981;
  color: #047857 !important;
}

[data-theme="light"] .virtual-app-window .mode-tile-btn.active#btnGaming {
  background: #ebf5ff;
  border-color: #0078d4;
  color: #0078d4 !important;
}

[data-theme="light"] .virtual-app-window .mode-tile-btn.active#btnHighPerf {
  background: #fff7ed;
  border-color: #f97316;
  color: #c2410c !important;
}

[data-theme="light"] .virtual-app-window .mode-tile-btn.active .mode-tile-label {
  color: inherit !important;
  font-weight: 600;
}

[data-theme="light"] .virtual-app-window .app-stat-box {
  background: #ffffff;
  border-color: #e2e8f0;
}

[data-theme="light"] .virtual-app-window .app-progress-bar {
  background: #e2e8f0;
}

[data-theme="light"] .virtual-app-window .custom-dropdown-trigger {
  background: #ffffff;
  border-color: #e2e8f0;
  color: #0f172a;
}

[data-theme="light"] .virtual-app-window .custom-dropdown-trigger:hover {
  border-color: #cbd5e1;
}

[data-theme="light"] .virtual-app-window .custom-dropdown-menu {
  background: #ffffff;
  border-color: #e2e8f0;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .virtual-app-window .custom-dropdown-item {
  color: #0f172a;
}

[data-theme="light"] .virtual-app-window .custom-dropdown-item:hover {
  background: #f1f5f9;
}

[data-theme="light"] .virtual-app-window .custom-dropdown-item.selected {
  background: #ebf5ff;
  border-color: #bae6fd;
  color: #0284c7;
}

[data-theme="light"] .virtual-app-window .app-color-trigger {
  background: #ffffff;
  border-color: #e2e8f0;
  color: #0f172a;
}

[data-theme="light"] .virtual-app-window .app-color-trigger.disabled {
  color: #94a3b8;
  background: #f8fafc;
}

[data-theme="light"] .virtual-app-window .app-slider {
  background: #e2e8f0;
}

[data-theme="light"] .virtual-app-window .app-slider::-webkit-slider-thumb {
  background: #0f172a;
  border-color: #ffffff;
}

[data-theme="light"] .virtual-app-window .app-footer-btn {
  background: #ffffff;
  border-color: #e2e8f0;
  color: #0f172a;
}

[data-theme="light"] .virtual-app-window .app-footer-btn:hover {
  background: #f8fafc;
  border-color: #cbd5e1;
}

[data-theme="light"] .virtual-app-window .zone-box {
  background: #ffffff;
  border-color: #cbd5e1;
  color: #0f172a !important;
}

[data-theme="light"] .virtual-app-window .zone-box.active {
  border-color: #0284c7;
  box-shadow: 0 0 8px rgba(2, 132, 199, 0.25);
}

/* ===================================================================
   COMPARISON SECTION
   =================================================================== */
.comparison-section {
  padding: 70px 0;
  background-color: var(--bg-surface);
  position: relative;
  transition: background-color var(--transition-normal);
}

.comparison-table-wrapper {
  margin-top: 30px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-medium);
  overflow-x: auto;
  box-shadow: var(--shadow-sm);
  background: var(--bg-card);
  transition: all var(--transition-normal);
}

.comparison-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
  text-align: left;
}

.comparison-table th,
.comparison-table td {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.92rem;
}

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

.comparison-table th {
  font-size: 0.88rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background-color: var(--bg-surface);
}

.comparison-table th:first-child {
  width: 34%;
  color: var(--text-muted);
}

.comparison-table th:nth-child(2) {
  width: 33%;
  color: var(--accent-cyan);
  background: rgba(0, 240, 255, 0.06);
  border-left: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
}

.comparison-table td:nth-child(2) {
  background: rgba(0, 240, 255, 0.03);
  border-left: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
  font-weight: 600;
  color: var(--text-primary);
}

.comparison-table th:nth-child(3) {
  width: 33%;
  color: var(--text-muted);
}

.badge-tag-good {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-emerald);
}

.badge-tag-bad {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-rose);
}

/* ===================================================================
   FEATURES GRID
   =================================================================== */
.features-section {
  padding: 70px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 36px;
}

.feature-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-md);
  background-color: var(--bg-card-hover);
}

.feature-icon-wrapper {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background: rgba(0, 240, 255, 0.1);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  border: 1px solid rgba(0, 240, 255, 0.2);
}

.feature-card h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ===================================================================
   GUIDE SECTION
   =================================================================== */
.guide-section {
  padding: 70px 0;
  background-color: var(--bg-surface);
  transition: background-color var(--transition-normal);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 36px;
}

.step-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-normal);
}

.step-number {
  position: absolute;
  top: 18px;
  right: 18px;
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--border-medium);
  line-height: 1;
  font-family: var(--font-mono);
}

.step-badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  background: rgba(0, 240, 255, 0.1);
  color: var(--accent-cyan);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 14px;
  width: fit-content;
}

.step-card h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.step-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

.step-tip {
  margin-top: auto;
  padding: 10px 12px;
  background: rgba(0, 240, 255, 0.04);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent-cyan);
  font-size: 0.8rem;
  color: var(--text-muted);
}


/* Light Theme Overrides for Comparison, Features & Guide */
[data-theme="light"] .comparison-table-wrapper {
  background: #ffffff;
  border-color: #e2e8f0;
}

[data-theme="light"] .comparison-table th {
  background: #f8fafc;
  color: #475569;
}

[data-theme="light"] .comparison-table th:nth-child(2) {
  background: rgba(2, 132, 199, 0.08);
  color: #0284c7;
}

[data-theme="light"] .comparison-table td:nth-child(2) {
  background: rgba(2, 132, 199, 0.04);
}

[data-theme="light"] .feature-card {
  background: #ffffff;
  border-color: #e2e8f0;
}

[data-theme="light"] .feature-card:hover {
  background: #f8fafc;
  border-color: #0284c7;
}

[data-theme="light"] .feature-icon-wrapper {
  background: rgba(2, 132, 199, 0.1);
  color: #0284c7;
  border-color: rgba(2, 132, 199, 0.2);
}

[data-theme="light"] .step-card {
  background: #ffffff;
  border-color: #e2e8f0;
}

[data-theme="light"] .step-tip {
  background: rgba(2, 132, 199, 0.05);
  border-left-color: #0284c7;
  color: #475569;
}

[data-theme="light"] .step-badge {
  background: rgba(2, 132, 199, 0.1);
  color: #0284c7;
}

[data-theme="light"] .step-number {
  color: #e2e8f0;
}


/* ===================================================================
   HARDWARE SECTION
   =================================================================== */
.hardware-section {
  padding: 70px 0;
}

.hardware-card-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-top: 30px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.hardware-models-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  margin-top: 20px;
}

.model-chip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.model-chip:hover {
  border-color: var(--accent-cyan);
}

.model-name {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.model-status-pill {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: var(--radius-full);
}

.model-status-pill.verified {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.model-status-pill.compatible {
  background: rgba(0, 240, 255, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 240, 255, 0.3);
}

/* ===================================================================
   CHANGELOG SECTION
   =================================================================== */
.changelog-section {
  padding: 70px 0;
  background-color: var(--bg-surface);
  transition: background-color var(--transition-normal);
}

.changelog-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 32px;
}

.tab-btn {
  padding: 7px 16px;
  border-radius: var(--radius-full);
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.tab-btn.active {
  background: var(--accent-cyan);
  color: #07090e;
  border-color: var(--accent-cyan);
}

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 18px;
  width: 2px;
  background: var(--border-medium);
}

.timeline-entry {
  position: relative;
  padding-left: 50px;
  margin-bottom: 32px;
}

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

.timeline-marker {
  position: absolute;
  left: 9px;
  top: 6px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--bg-surface);
  border: 3px solid var(--accent-cyan);
  z-index: 2;
}

.timeline-entry.latest .timeline-marker {
  border-color: var(--accent-emerald);
}

.version-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.version-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-subtle);
}

.version-identity {
  display: flex;
  align-items: center;
  gap: 10px;
}

.version-tag {
  font-size: 1.15rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text-primary);
}

.latest-pill {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  padding: 2px 7px;
  border-radius: var(--radius-full);
}

.version-date {
  font-size: 0.8rem;
  color: var(--text-muted);
}

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

.version-highlights li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.highlight-bullet {
  color: var(--accent-cyan);
  font-weight: bold;
}

.version-download-btn {
  margin-top: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--accent-cyan);
  font-weight: 600;
}

.version-download-btn:hover {
  text-decoration: underline;
}

/* ===================================================================
   FAQ SECTION
   =================================================================== */
.faq-section {
  padding: 70px 0;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 30px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: all var(--transition-normal);
}

.faq-item h4 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.faq-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ===================================================================
   FOOTER
   =================================================================== */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 45px 0 24px 0;
  transition: background-color var(--transition-normal);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 30px;
}

.footer-brand p {
  max-width: 380px;
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.footer-col h5 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 12px;
}

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

.footer-links a {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

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

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

.disclaimer-box {
  margin-top: 16px;
  padding: 12px 14px;
  background: rgba(0, 0, 0, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ===================================================================
   RESPONSIVE DESIGN
   =================================================================== */
@media (max-width: 1024px) {
  .simulator-container {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .features-grid, .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .site-nav {
    display: none;
  }
  .mobile-menu-btn {
    display: inline-flex;
  }
  .site-nav.mobile-active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-medium);
    padding: 16px 20px;
    gap: 12px;
    box-shadow: var(--shadow-lg);
  }
  .stats-strip {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .stat-item {
    border-right: none;
  }
  .features-grid, .steps-grid, .faq-grid {
    grid-template-columns: 1fr;
  }
  .telemetry-gauges-row {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}