:root {
  --bg-primary: #0a0d14;
  --bg-secondary: #111726;
  --bg-card: rgba(23, 31, 50, 0.7);
  --bg-card-hover: rgba(30, 41, 67, 0.85);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(56, 189, 248, 0.3);
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --accent-cyan: #38bdf8;
  --accent-blue: #3b82f6;
  --accent-purple: #818cf8;
  --accent-emerald: #34d399;
  --accent-amber: #fbbf24;
  --gradient-glow: linear-gradient(135deg, rgba(56, 189, 248, 0.15) 0%, rgba(99, 102, 241, 0.15) 100%);
  --gradient-btn: linear-gradient(135deg, #0284c7 0%, #4f46e5 100%);
  --shadow-lg: 0 20px 40px -15px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 35px -5px rgba(56, 189, 248, 0.25);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  position: relative;
}

/* Background decorative ambient lights */
body::before {
  content: "";
  position: fixed;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.12) 0%, rgba(79, 70, 229, 0.08) 50%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
  color: #7dd3fc;
}

/* Header & Navigation */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(10, 13, 20, 0.8);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #38bdf8, #6366f1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.3);
}

.brand-badge {
  font-size: 0.7rem;
  padding: 0.15rem 0.5rem;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  color: var(--text-muted);
  font-weight: 500;
  margin-left: 0.25rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.925rem;
  font-weight: 500;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-main);
}

.btn-nav {
  padding: 0.5rem 1rem;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-sm);
  color: var(--accent-cyan) !important;
  font-weight: 600 !important;
  transition: all 0.2s ease;
}

.btn-nav:hover {
  background: rgba(56, 189, 248, 0.2);
  border-color: rgba(56, 189, 248, 0.4);
}

/* Main Container */
.main-content {
  flex: 1;
  position: relative;
  z-index: 1;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Hero Section */
.hero-section {
  padding: 4.5rem 0 3.5rem;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-full);
  color: var(--accent-cyan);
  font-size: 0.825rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: 3.25rem;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #ffffff 0%, #38bdf8 50%, #818cf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  background: var(--gradient-btn);
  color: #ffffff;
  padding: 0.85rem 1.6rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  box-shadow: 0 8px 20px -4px rgba(2, 132, 199, 0.4);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 25px -4px rgba(2, 132, 199, 0.55);
  color: #ffffff;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 0.85rem 1.4rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s ease;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  color: #ffffff;
}

/* Phone Mockup & Interactive Assistive Touch Demo */
.mockup-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
}

.phone-frame {
  width: 100%;
  max-width: 340px;
  height: 580px;
  background: #020617;
  border: 8px solid #1e293b;
  border-radius: 40px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  display: flex;
  flex-direction: column;
}

.phone-notch {
  width: 120px;
  height: 20px;
  background: #1e293b;
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  border-bottom-left-radius: 14px;
  border-bottom-right-radius: 14px;
  z-index: 10;
}

.phone-screen {
  flex: 1;
  background: radial-gradient(circle at 50% 20%, #1e1b4b 0%, #090d16 80%);
  position: relative;
  padding: 2.5rem 1.25rem 1.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  user-select: none;
}

.mockup-header {
  text-align: center;
  margin-top: 1rem;
}

.mockup-time {
  font-size: 2.75rem;
  font-weight: 200;
  color: #e2e8f0;
  line-height: 1;
}

.mockup-date {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

.mockup-hint {
  font-size: 0.75rem;
  text-align: center;
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.12);
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-full);
  margin: 0 auto;
  animation: pulseHint 2.5s infinite;
}

@keyframes pulseHint {
  0%, 100% { opacity: 0.8; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.03); }
}

/* Floating button simulation */
.floating-touch-btn {
  position: absolute;
  top: 40%;
  right: 18px;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 2px solid rgba(255, 255, 255, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4), 0 0 15px rgba(255, 255, 255, 0.3);
  z-index: 20;
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), background-color 0.2s ease;
}

.floating-touch-btn:hover {
  transform: scale(1.08);
}

.floating-inner-dot {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: white;
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.8);
}

/* Quick Action Grid Overlay */
.touch-grid-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  width: 280px;
  background: rgba(15, 23, 42, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: 24px;
  padding: 1rem;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.6), 0 0 25px rgba(56, 189, 248, 0.15);
  z-index: 25;
  display: none;
  opacity: 0;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.touch-grid-overlay.active {
  display: block;
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.grid-overlay-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.grid-overlay-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-cyan);
}

.grid-overlay-close {
  font-size: 0.75rem;
  color: var(--text-dim);
  cursor: pointer;
  background: none;
  border: none;
}

.grid-overlay-close:hover {
  color: var(--text-main);
}

.quick-action-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}

.grid-slot {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 0.45rem 0.2rem;
  transition: all 0.15s ease;
  cursor: pointer;
}

.grid-slot:hover {
  background: rgba(56, 189, 248, 0.15);
  border-color: rgba(56, 189, 248, 0.4);
  transform: scale(1.04);
}

.grid-slot svg {
  width: 20px;
  height: 20px;
  stroke: var(--accent-cyan);
  margin-bottom: 0.2rem;
}

.grid-slot span {
  font-size: 0.6rem;
  color: #e2e8f0;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 50px;
}

/* Section Common */
.section {
  padding: 4.5rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3rem;
}

.section-badge {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-cyan);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(56, 189, 248, 0.4), transparent);
  opacity: 0;
  transition: opacity 0.2s ease;
}

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

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.icon-blue { background: rgba(56, 189, 248, 0.12); color: var(--accent-cyan); }
.icon-purple { background: rgba(129, 140, 248, 0.12); color: var(--accent-purple); }
.icon-emerald { background: rgba(52, 211, 153, 0.12); color: var(--accent-emerald); }
.icon-amber { background: rgba(251, 191, 36, 0.12); color: var(--accent-amber); }

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.6rem;
  color: #ffffff;
}

.feature-desc {
  font-size: 0.925rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
}

.feature-list {
  list-style: none;
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.feature-list li {
  font-size: 0.85rem;
  color: #cbd5e1;
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.feature-list li svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  color: var(--accent-emerald);
  margin-top: 2px;
}

/* Gestures Showcase Section */
.gestures-section {
  background: rgba(17, 23, 38, 0.5);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.gestures-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
}

.gesture-pill {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem 1rem;
  text-align: center;
  transition: all 0.2s ease;
}

.gesture-pill:hover {
  background: rgba(56, 189, 248, 0.08);
  border-color: rgba(56, 189, 248, 0.3);
  transform: translateY(-2px);
}

.gesture-pill-icon {
  width: 36px;
  height: 36px;
  margin: 0 auto 0.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  color: var(--accent-cyan);
}

.gesture-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: #ffffff;
}

.gesture-desc {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 0.2rem;
}

/* Permissions Section */
.permissions-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.permission-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.permission-badge {
  font-size: 0.7rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  display: inline-block;
  margin-bottom: 0.75rem;
}

.badge-required {
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.badge-optional {
  background: rgba(52, 211, 153, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(52, 211, 153, 0.3);
}

.badge-system {
  background: rgba(251, 191, 36, 0.15);
  color: var(--accent-amber);
  border: 1px solid rgba(251, 191, 36, 0.3);
}

.permission-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: #ffffff;
}

.permission-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.permission-card .privacy-note {
  margin-top: 0.75rem;
  font-size: 0.8rem;
  padding: 0.6rem;
  background: rgba(255, 255, 255, 0.03);
  border-left: 3px solid var(--accent-emerald);
  border-radius: 0 6px 6px 0;
  color: #cbd5e1;
}

/* Call to Action Banner */
.cta-banner {
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.2) 0%, rgba(79, 70, 229, 0.2) 100%);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  margin: 3rem auto 0;
  max-width: 900px;
  position: relative;
  overflow: hidden;
}

.cta-banner h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.cta-banner p {
  font-size: 1.05rem;
  color: #cbd5e1;
  max-width: 600px;
  margin: 0 auto 1.75rem;
}

/* Legal Documents Layout (Privacy Policy & Term of Use) */
.legal-wrapper {
  padding: 3.5rem 0 5rem;
}

.legal-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 3rem;
  max-width: 860px;
  margin: 0 auto;
  box-shadow: var(--shadow-lg);
}

.legal-header {
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 1.75rem;
  margin-bottom: 2rem;
}

.legal-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.legal-meta {
  font-size: 0.875rem;
  color: var(--text-dim);
}

.legal-content h2 {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 2rem 0 0.75rem;
  color: #ffffff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 0.4rem;
}

.legal-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 1.25rem 0 0.5rem;
  color: #e2e8f0;
}

.legal-content p {
  font-size: 0.95rem;
  color: #cbd5e1;
  line-height: 1.75;
  margin-bottom: 1.15rem;
}

.legal-content ul, .legal-content ol {
  margin: 0.5rem 0 1.25rem 1.5rem;
  color: #cbd5e1;
}

.legal-content li {
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
  line-height: 1.65;
}

.legal-notice-box {
  background: rgba(56, 189, 248, 0.08);
  border-left: 4px solid var(--accent-cyan);
  padding: 1.25rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.5rem 0;
}

.legal-notice-box p {
  margin-bottom: 0;
  font-size: 0.925rem;
  color: #e2e8f0;
}

.contact-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin-top: 1.5rem;
}

.contact-card p {
  margin-bottom: 0.35rem;
}

/* Footer */
.footer {
  background: #07090f;
  border-top: 1px solid var(--border-subtle);
  padding: 3.5rem 0 2rem;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 2.5rem;
}

.footer-brand h4 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.6;
  max-width: 360px;
}

.footer-col h5 {
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #e2e8f0;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--text-muted);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.825rem;
  color: var(--text-dim);
}

/* Responsive */
@media (max-width: 900px) {
  .hero-section {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2.5rem;
    padding-top: 2.5rem;
  }

  .hero-pill {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-cta-group {
    justify-content: center;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (max-width: 600px) {
  .hero-title {
    font-size: 2rem;
  }

  .nav-links {
    gap: 1rem;
  }

  .nav-links li:not(:last-child) {
    display: none;
  }

  .legal-card {
    padding: 1.75rem 1.25rem;
  }

  .legal-title {
    font-size: 1.75rem;
  }
}