/* ==========================================================================
   iPhone Duo DevTools Simulator — Public Showcase & Docs
   Design System: Apple Keynote Dark Aesthetic / Glassmorphism
   ========================================================================== */

:root {
  --bg-primary: #06080D;
  --bg-secondary: #0D111A;
  --bg-card: rgba(18, 23, 33, 0.72);
  --bg-card-hover: rgba(26, 33, 48, 0.85);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(100, 210, 255, 0.3);
  --text-primary: #F5F5F7;
  --text-secondary: #8E8E93;
  --text-tertiary: #636366;
  --accent-blue: #0A84FF;
  --accent-cyan: #64D2FF;
  --accent-purple: #BF5AF2;
  --accent-green: #30D158;
  --accent-orange: #FF9F0A;
  --font-stack: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Inter", -system-ui, sans-serif;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-pill: 999px;
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-stack);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Background Ambient Glows */
.ambient-glow {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  filter: blur(100px);
}

.glow-blue {
  width: 500px;
  height: 500px;
  top: -150px;
  left: 20%;
  background: radial-gradient(circle, rgba(10, 132, 255, 0.22) 0%, transparent 70%);
}

.glow-purple {
  width: 550px;
  height: 550px;
  top: 400px;
  right: -100px;
  background: radial-gradient(circle, rgba(191, 90, 242, 0.18) 0%, transparent 70%);
}

.glow-cyan {
  width: 450px;
  height: 450px;
  bottom: 10%;
  left: -100px;
  background: radial-gradient(circle, rgba(100, 210, 255, 0.14) 0%, transparent 70%);
}

/* Navigation */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(6, 8, 13, 0.85);
  border-bottom: 1px solid var(--border-subtle);
}

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

.nav-logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.nav-title {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.3px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* Mobile Quick-Jump Category Bar */
.mobile-nav-bar {
  display: none;
  background: rgba(13, 17, 26, 0.92);
  border-bottom: 1px solid var(--border-subtle);
  padding: 8px 16px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  position: sticky;
  top: 59px;
  z-index: 99;
}

.mobile-nav-scroll {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.mobile-nav-scroll::-webkit-scrollbar {
  display: none;
}

.mobile-nav-chip {
  padding: 5px 12px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
  text-decoration: none;
  transition: all 0.2s;
}

.mobile-nav-chip:hover,
.mobile-nav-chip:active {
  background: rgba(10, 132, 255, 0.2);
  color: var(--accent-cyan);
  border-color: rgba(100, 210, 255, 0.4);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.25s ease;
  user-select: none;
}

.btn-primary {
  background: linear-gradient(135deg, #0A84FF 0%, #0066CC 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 18px rgba(10, 132, 255, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(10, 132, 255, 0.6);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.14);
  transform: translateY(-2px);
}

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

/* Hero Section */
.hero {
  padding: 60px 0 50px;
}

.hero-split {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  text-align: left;
}

.hero-left-pane {
  flex: 1.1;
  min-width: 0;
}

.hero-right-pane {
  flex: 0.9;
  min-width: 0;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  background: rgba(10, 132, 255, 0.12);
  border: 1px solid rgba(10, 132, 255, 0.3);
  font-size: 11px;
  font-weight: 600;
  color: var(--accent-cyan);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 20px;
}

.hero-pill-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

.hero-title {
  font-size: clamp(30px, 5.2vw, 58px);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -1.2px;
  margin-bottom: 18px;
  word-break: break-word;
}

.gradient-text {
  background: linear-gradient(135deg, #64D2FF 0%, #0A84FF 35%, #BF5AF2 70%, #FF2D55 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(15px, 1.8vw, 18px);
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* Hero Device Telemetry Card */
.hero-telemetry-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

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

.telemetry-badge {
  font-size: 12px;
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.telemetry-status-pill {
  font-size: 10px;
  font-weight: 700;
  color: var(--accent-cyan);
  background: rgba(10, 132, 255, 0.18);
  border: 1px solid rgba(10, 132, 255, 0.4);
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  text-transform: uppercase;
}

.telemetry-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-bottom: 18px;
}

.telemetry-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.telemetry-item.highlight {
  background: rgba(10, 132, 255, 0.08);
  border-color: rgba(10, 132, 255, 0.28);
}

.telemetry-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-tertiary);
  text-transform: uppercase;
}

.telemetry-val {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.telemetry-footer {
  text-align: center;
}

.telemetry-quick-link {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-cyan);
  text-decoration: none;
  transition: opacity 0.2s;
}

.telemetry-quick-link:hover {
  opacity: 0.8;
}

/* Interactive Playground Section */
.playground-section {
  padding: 40px 0 80px;
}

.playground-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.05);
  overflow: hidden;
}

.playground-toolbar {
  padding: 18px 24px;
  background: rgba(22, 28, 42, 0.6);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.posture-buttons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.posture-btn {
  padding: 8px 16px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.posture-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.posture-btn.active {
  background: var(--accent-blue);
  border-color: var(--accent-cyan);
  color: #FFFFFF;
  box-shadow: 0 0 16px rgba(10, 132, 255, 0.4);
}

.control-toggles {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 13px;
  color: var(--text-secondary);
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.toggle-label input {
  accent-color: var(--accent-blue);
}

/* Active Posture Status Bar */
.stage-status-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px 16px;
  background: rgba(10, 14, 22, 0.6);
  border-bottom: 1px solid var(--border-subtle);
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

.status-indicator-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

.posture-status-badge {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", sans-serif;
  color: var(--accent-cyan);
  letter-spacing: 0.3px;
}

/* 3D Emulation Stage */
.stage {
  padding: 40px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 480px;
  perspective: 1200px;
  background: radial-gradient(circle at center, rgba(16, 22, 34, 0.5) 0%, rgba(6, 8, 13, 0.8) 100%);
  position: relative;
  overflow: hidden;
}

/* Phone Hardware Frame */
.phone-chassis {
  position: relative;
  transition: all 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
  transform-style: preserve-3d;
  display: flex;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.8);
  max-width: 100%;
}

/* Posture: Unfolded (Flat 7.6" Default) */
.phone-chassis.unfolded {
  width: min(100%, 640px);
  height: clamp(320px, 48vw, 440px);
  border: 3px solid #333338;
  border-radius: 36px;
  background: #101014;
  padding: 10px;
}

/* Posture: Folded (5.4" Outer Display) */
.phone-chassis.folded {
  width: min(85%, 320px);
  height: clamp(380px, 58vw, 460px);
  border: 3px solid #333338;
  border-radius: 36px;
  background: #101014;
  padding: 10px;
}

.phone-chassis.folded .screen-right,
.phone-chassis.folded .hinge-crease,
.phone-chassis.folded .reserved-zone {
  display: none;
}

/* Posture: Partially Folded (Book Pose 3D) */
.phone-chassis.partially-folded {
  width: min(100%, 640px);
  height: clamp(320px, 48vw, 440px);
  border: none;
  background: transparent;
  padding: 0;
}

.phone-chassis.partially-folded .screen-left {
  transform-origin: right center;
  transform: rotateY(24deg);
  box-shadow: -15px 25px 45px rgba(0, 0, 0, 0.7);
  border-radius: 32px 8px 8px 32px;
}

.phone-chassis.partially-folded .screen-right {
  transform-origin: left center;
  transform: rotateY(-24deg);
  box-shadow: 15px 25px 45px rgba(0, 0, 0, 0.7);
  border-radius: 8px 32px 32px 8px;
}

.phone-chassis.partially-folded .spine-shadow {
  display: block;
}

/* Posture: Split View */
.phone-chassis.split-view {
  width: min(100%, 640px);
  height: clamp(320px, 48vw, 440px);
  border: 3px solid #333338;
  border-radius: 36px;
  background: #101014;
  padding: 10px;
}

.phone-chassis.split-view .screen-left,
.phone-chassis.split-view .screen-right {
  background: #181c26;
}

/* Screen Panes */
.screen-pane {
  flex: 1;
  background: #FFFFFF;
  color: #1D1D1F;
  border-radius: 26px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: all 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.screen-left {
  margin-right: 4px;
  border-top-right-radius: 12px;
  border-bottom-right-radius: 12px;
}

.screen-right {
  margin-left: 4px;
  border-top-left-radius: 12px;
  border-bottom-left-radius: 12px;
  background: #FBFBFD;
}

/* Outer Camera Dynamic Island */
.dynamic-island {
  position: absolute;
  top: 14px;
  left: 20px;
  width: 52px;
  height: 16px;
  background: #000000;
  border-radius: 10px;
  z-index: 30;
  display: none;
}

.phone-chassis.folded .dynamic-island {
  display: block;
}

/* Crease Guides */
.hinge-crease {
  position: absolute;
  left: 50%;
  top: 10px;
  bottom: 10px;
  width: 2px;
  transform: translateX(-50%);
  background: repeating-linear-gradient(to bottom, #007AFF 0, #007AFF 6px, transparent 6px, transparent 12px);
  z-index: 20;
  pointer-events: none;
}

.crease-badge {
  position: absolute;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: #007AFF;
  color: #FFFFFF;
  font-size: 10px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 100px;
  box-shadow: 0 2px 8px rgba(0, 122, 255, 0.5);
  z-index: 21;
}

.reserved-zone {
  position: absolute;
  left: calc(50% - 20px);
  top: 10px;
  bottom: 10px;
  width: 40px;
  background: rgba(255, 149, 0, 0.16);
  border-left: 1px dashed rgba(255, 149, 0, 0.6);
  border-right: 1px dashed rgba(255, 149, 0, 0.6);
  z-index: 15;
  pointer-events: none;
}

.spine-shadow {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 50px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, rgba(0,0,0,0.5) 0%, rgba(0,0,0,0.85) 50%, rgba(0,0,0,0.5) 100%);
  z-index: 25;
  pointer-events: none;
  display: none;
}

/* Screen Mockup Content */
.screen-header {
  font-size: 16px;
  font-weight: 800;
  margin-bottom: 6px;
}

.screen-text {
  font-size: 12px;
  color: #6E6E73;
  line-height: 1.4;
}

.mockup-card {
  margin-top: auto;
  background: rgba(0, 122, 255, 0.08);
  border-radius: 12px;
  padding: 12px;
  border: 1px solid rgba(0, 122, 255, 0.2);
}

.mockup-label {
  font-size: 10px;
  font-weight: 700;
  color: var(--accent-blue);
  text-transform: uppercase;
}

.mockup-val {
  font-size: 12px;
  font-weight: 600;
  color: #1D1D1F;
  margin-top: 2px;
}

/* Playground Angle Controller */
.angle-slider-box {
  margin-top: 24px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-pill);
  padding: 10px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-primary);
  display: none;
}

.angle-slider-box input[type="range"] {
  width: 180px;
  accent-color: var(--accent-purple);
}

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

.section-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-title {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.8px;
  margin-bottom: 12px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 32px 28px;
  transition: all 0.3s ease;
  backdrop-filter: blur(16px);
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.feature-icon {
  font-size: 32px;
  margin-bottom: 18px;
}

.feature-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}

.feature-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* WebMCP Section */
.webmcp-section {
  padding: 60px 0 100px;
}

.webmcp-split {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 48px;
}

.webmcp-left-pane {
  flex: 1;
  min-width: 0;
}

.webmcp-right-pane {
  flex: 1.15;
  min-width: 0;
}

.webmcp-perks {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 24px;
}

.webmcp-perk-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.perk-icon {
  font-size: 20px;
  line-height: 1;
}

.webmcp-perk-item strong {
  display: block;
  font-size: 14px;
  margin-bottom: 4px;
  color: var(--text-primary);
}

.webmcp-perk-item p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.45;
  margin: 0;
}

.code-box {
  background: #090B10;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 13px;
  line-height: 1.6;
  color: #A9B1D6;
  position: relative;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  padding-bottom: 10px;
  color: var(--text-secondary);
  font-size: 12px;
}

.copy-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  color: var(--text-primary);
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
}

.copy-btn:hover {
  background: rgba(255, 255, 255, 0.16);
}

/* Footer */
.footer {
  border-top: 1px solid var(--border-subtle);
  padding: 40px 0;
  background: rgba(6, 8, 13, 0.95);
  font-size: 13px;
  color: var(--text-secondary);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s;
}

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

/* Privacy Page Specific */
.privacy-container {
  max-width: 800px;
  margin: 60px auto 100px;
  padding: 0 24px;
}

.privacy-title {
  font-size: 38px;
  font-weight: 800;
  margin-bottom: 12px;
}

.privacy-meta {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 16px;
}

.privacy-content h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 32px 0 12px;
  color: var(--text-primary);
}

.privacy-content p {
  font-size: 15px;
  color: #C7C7CC;
  line-height: 1.7;
  margin-bottom: 16px;
}

.privacy-content ul {
  margin: 0 0 20px 24px;
  color: #C7C7CC;
}

.privacy-content li {
  margin-bottom: 8px;
  font-size: 15px;
  line-height: 1.6;
}

/* ==========================================================================
   iPhone Duo (7.6" Unfolded 890px) & CSS Dual-Screen Architecture
   Respects the 40px center hinge (x: 425px to 465px) so elements never sit on crease
   ========================================================================== */
@media (min-width: 800px) and (max-width: 960px),
       (horizontal-viewport-segments: 2),
       (screen-spanning: single-fold-vertical) {
  .container {
    padding: 0 32px;
  }

  /* Dual-Screen Hero: Left display has headline/copy; Right display has telemetry card */
  .hero-split {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 48px; /* Safe clearance across center 40px hinge */
    text-align: left;
  }
  .hero-left-pane {
    flex: 1;
  }
  .hero-right-pane {
    flex: 1;
  }
  .hero-title {
    font-size: 32px;
    line-height: 1.15;
    letter-spacing: -0.8px;
  }
  .hero-subtitle {
    font-size: 14.5px;
    margin-bottom: 22px;
  }
  .hero-actions {
    justify-content: flex-start;
  }

  /* Dual-Screen Features: 2 balanced columns, 1 on each display */
  .features-section .grid {
    grid-template-columns: 1fr 1fr;
    column-gap: 48px; /* Leaves 40px center crease completely clear */
    row-gap: 20px;
  }

  /* Dual-Screen WebMCP: Left screen explains, Right screen shows code */
  .webmcp-split {
    flex-direction: row;
    gap: 48px;
  }
  .webmcp-left-pane,
  .webmcp-right-pane {
    flex: 1;
  }
}

/* ==========================================================================
   Mobile Responsiveness (Folded 5.4" Outer: 466px, and mobile <= 768px)
   ========================================================================== */
@media (max-width: 768px) {
  .navbar {
    padding: 12px 18px;
  }
  .nav-links {
    display: none;
  }
  .nav-title {
    font-size: 14px;
  }
  .btn {
    padding: 7px 14px;
    font-size: 12px;
  }
  .mobile-nav-bar {
    display: block;
  }
  .hero {
    padding: 36px 0 24px;
  }
  .hero-split {
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }
  .hero-left-pane {
    text-align: center;
  }
  .hero-title {
    font-size: clamp(22px, 5.8vw, 32px);
    letter-spacing: -0.6px;
    line-height: 1.2;
    padding: 0 12px;
  }
  .hero-subtitle {
    font-size: 14px;
    padding: 0 4px;
    margin-bottom: 20px;
  }
  .hero-actions {
    justify-content: center;
  }
  .playground-toolbar {
    padding: 14px 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  .posture-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    width: 100%;
  }
  .posture-btn {
    width: 100%;
    padding: 10px 6px;
    font-size: 12px;
    min-height: 44px; /* iOS HIG touch target */
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
  }
  .control-toggles {
    justify-content: space-around;
    width: 100%;
    gap: 10px;
    font-size: 12px;
  }
  .screen-pane {
    padding: 16px;
  }
  .screen-header {
    font-size: 13px;
  }
  .screen-text {
    font-size: 11px;
  }
  .mockup-card {
    padding: 10px;
  }
  .mockup-label {
    font-size: 10px;
  }
  .mockup-val {
    font-size: 12px;
  }
  .features-section .grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .webmcp-split {
    flex-direction: column;
    gap: 24px;
  }
  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: 16px;
  }
  .footer-links {
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
  }
}