/* --- GrowBright Modern Dark Theme --- */

/* Design System Variables */
:root {
  /* Colors */
  --primary: #00D9FF;
  --primary-dark: #00B8E6;
  --primary-light: #33E1FF;
  --secondary: #6366F1;
  --secondary-dark: #4F46E5;
  --accent: #10B981;
  --accent-dark: #059669;
  --success: #22C55E;
  --warning: #F59E0B;
  --error: #EF4444;
  
  /* Backgrounds */
  --bg-primary: #0A0F1C;
  --bg-secondary: #1A1F2E;
  --bg-tertiary: #2A2F3E;
  --bg-card: #1E2430;
  --bg-surface: #252B3A;
  
  /* Text */
  --text-primary: #F8FAFC;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;
  --text-disabled: #64748B;
  
  /* Borders */
  --border-primary: #334155;
  --border-secondary: #475569;
  --border-muted: #374151;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.4);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
  --shadow-glow: 0 0 20px rgba(0, 217, 255, 0.3);
  --shadow-glow-strong: 0 0 40px rgba(0, 217, 255, 0.4);
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-full: 9999px;
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 5rem;
  --space-5xl: 6rem;
  
  /* Typography */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;
  
  /* Animation */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1010;
  --z-fixed: 1020;
  --z-modal-backdrop: 1030;
  --z-modal: 1040;
  --z-popover: 1050;
  --z-tooltip: 1060;
}

/* Reset and Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-feature-settings: 'cv11', 'ss01';
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: var(--font-size-base);
  padding-top: 80px;
  min-height: 100vh;
  transition: var(--transition-normal);
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

h1 { font-size: clamp(var(--font-size-4xl), 5vw, var(--font-size-6xl)); }
h2 { font-size: clamp(var(--font-size-3xl), 4vw, var(--font-size-5xl)); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }

p {
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
  line-height: 1.7;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(10, 15, 28, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-primary);
  z-index: var(--z-fixed);
  transition: var(--transition-normal);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-md) var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-primary);
  text-decoration: none;
  font-size: var(--font-size-xl);
  font-weight: 700;
  transition: var(--transition-fast);
}

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

.nav-logo img {
  width: 32px;
  height: 32px;
  filter: brightness(0) invert(1);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  position: relative;
  transition: var(--transition-fast);
  padding: var(--space-sm) 0;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transition: var(--transition-normal);
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-xl);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: var(--font-size-sm);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: var(--transition-fast);
  position: relative;
  overflow: hidden;
  min-height: 44px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg), var(--shadow-glow-strong);
}

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

.btn-secondary:hover {
  background: var(--bg-surface);
  border-color: var(--primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.nav-demo-btn {
  padding: var(--space-sm) var(--space-lg);
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

/* Hero Section */
.hero-ai {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: radial-gradient(ellipse at top, rgba(0, 217, 255, 0.1) 0%, transparent 50%),
              linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
  position: relative;
  overflow: hidden;
}

.hero-ai::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 40%;
  height: 200%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(3deg); }
}

.hero-content {
  flex: 1;
  max-width: 600px;
  padding: var(--space-4xl) var(--space-xl);
  z-index: 1;
}

.hero-intro {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-xl);
  box-shadow: var(--shadow-glow);
}

.hero-ai h1 {
  margin-bottom: var(--space-xl);
  background: linear-gradient(135deg, var(--text-primary), var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-highlight {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

.hero-desc {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
  max-width: 90%;
}

.hero-sub {
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: var(--space-2xl);
}

.hero-ctas {
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
}

.hero-visual {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  z-index: 1;
}

.hero-devices {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.hero-image, .hero-phone {
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  transition: var(--transition-slow);
}

.hero-image {
  max-width: 500px;
  width: 100%;
  height: auto;
}

.hero-phone {
  width: 150px;
  height: auto;
}

.hero-image:hover, .hero-phone:hover {
  transform: scale(1.02) rotateY(5deg);
  box-shadow: var(--shadow-2xl), var(--shadow-glow);
}

/* Section Base Styles */
.section {
  padding: var(--space-5xl) 0;
  position: relative;
}

.section-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-4xl);
}

.section-title {
  background: linear-gradient(135deg, var(--text-primary), var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-lg);
}

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

/* Card Components */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: var(--transition-normal);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
  border-color: var(--border-secondary);
}

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

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-2xl);
  margin-top: var(--space-2xl);
}

.card-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.card-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.card-icon img {
  width: 24px;
  height: 24px;
  filter: brightness(0) invert(1);
}

.card-title {
  font-size: var(--font-size-xl);
  color: var(--text-primary);
  margin: 0;
}

.card-content p {
  color: var(--text-secondary);
  margin-bottom: var(--space-md);
}

/* Product Magic Section */
.product-magic {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-primary);
}

.magic-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-2xl);
  margin-top: var(--space-2xl);
}

/* Value Proposition */
.value-prop {
  background: var(--bg-primary);
}

.value-prop-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-2xl);
  margin-top: var(--space-2xl);
}

.value-prop-card {
  text-align: center;
}

.value-prop-metric {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-sm);
}

/* Features Section */
.features-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-primary);
}

.features-bar {
  display: flex;
  justify-content: center;
  gap: var(--space-md);
  margin-bottom: var(--space-3xl);
  flex-wrap: wrap;
}

.feature-tab {
  background: var(--bg-card);
  color: var(--text-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-full);
  padding: var(--space-md) var(--space-xl);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-fast);
  min-width: 140px;
  text-align: center;
}

.feature-tab:hover,
.feature-tab.active {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}

.feature-panel {
  display: none;
}

.feature-panel.active {
  display: block;
  animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.feature-panel-content {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-2xl);
  padding: var(--space-3xl);
  box-shadow: var(--shadow-lg);
}

.feature-panel-title {
  color: var(--primary);
  margin-bottom: var(--space-lg);
}

.feature-panel-bullets {
  list-style: none;
  margin-bottom: var(--space-xl);
}

.feature-panel-bullets li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
  color: var(--text-secondary);
}

.feature-check {
  width: 20px;
  height: 20px;
  filter: brightness(0) invert(1);
  flex-shrink: 0;
  margin-top: 2px;
}

/* Use Cases */
.feature-panel-usecases {
  background: var(--bg-surface);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  position: relative;
  overflow: hidden;
}

.feature-panel-usecases::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
}

.usecase-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--space-sm);
}

.usecase-label::before {
  content: '💡';
  font-size: 1.2em;
}

.usecase-context {
  color: var(--text-muted);
  font-style: italic;
  margin-bottom: var(--space-xl);
}

.feature-usecases {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.usecase-card {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.usecase-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  transition: var(--transition-normal);
}

.usecase-card::after {
  content: '→';
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  width: 32px;
  height: 32px;
  background: var(--bg-surface);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-muted);
  opacity: 0;
  transform: translateX(10px);
  transition: var(--transition-normal);
}

.usecase-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.usecase-card:hover::before {
  width: 6px;
}

.usecase-card:hover::after {
  opacity: 1;
  transform: translateX(0);
  background: var(--primary);
  color: white;
}

/* How Different Section - Redesigned Compact */
/* How is GrowBright Different Section */
.how-different {
  background: var(--bg-primary);
  padding: var(--space-5xl) 0;
}

.different-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: var(--space-2xl);
  align-items: start;
  max-width: 1200px;
  margin: 0 auto;
}

.different-card {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  position: relative;
  overflow: hidden;
  transition: var(--transition-normal);
}

.different-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--error), #FF6B6B);
  opacity: 0.8;
}

.different-card.traditional::before {
  background: linear-gradient(90deg, var(--error), #FF6B6B);
}

.different-card.growbright::before {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.different-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.different-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-bottom: var(--space-xl);
}

.different-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  position: relative;
}

.different-icon img {
  width: 32px;
  height: 32px;
  filter: brightness(0) invert(1);
}

.traditional-icon {
  background: linear-gradient(135deg, var(--error), #FF6B6B);
  box-shadow: 0 8px 32px rgba(239, 68, 68, 0.3);
}

.growbright-icon {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: var(--shadow-glow);
}

.different-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.different-badge {
  background: var(--bg-surface);
  color: var(--text-secondary);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border: 1px solid var(--border-primary);
}

.traditional .different-badge {
  background: rgba(239, 68, 68, 0.1);
  color: var(--error);
  border-color: rgba(239, 68, 68, 0.3);
}

.growbright .different-badge {
  background: rgba(0, 217, 255, 0.1);
  color: var(--primary);
  border-color: rgba(0, 217, 255, 0.3);
}

.different-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.different-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}

.different-item:hover {
  background: var(--bg-surface);
  transform: translateX(4px);
}

.different-item .item-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  margin-top: 2px;
}

.traditional .different-item .item-icon {
  filter: hue-rotate(0deg) saturate(1.2);
}

.growbright .different-item .item-icon {
  filter: hue-rotate(180deg) saturate(1.2) brightness(1.2);
}

.different-item span {
  color: var(--text-secondary);
  font-size: var(--font-size-base);
  line-height: 1.5;
}

.different-divider {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-xl) 0;
}

.divider-line {
  width: 2px;
  height: 60px;
  background: linear-gradient(180deg, transparent, var(--border-primary), transparent);
}

.divider-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glow);
  animation: pulse-glow 2s infinite;
}

.divider-icon img {
  width: 24px;
  height: 24px;
  filter: brightness(0) invert(1);
}

@keyframes pulse-glow {
  0%, 100% {
    box-shadow: var(--shadow-glow);
    transform: scale(1);
  }
  50% {
    box-shadow: var(--shadow-glow-strong);
    transform: scale(1.05);
  }
}

/* Responsive Design for Different Section */
@media (max-width: 968px) {
  .different-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }
  
  .different-divider {
    flex-direction: row;
    justify-content: center;
  }
  
  .divider-line {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--border-primary), transparent);
  }
}

@media (max-width: 768px) {
  .different-card {
    padding: var(--space-xl);
  }
  
  .different-header {
    margin-bottom: var(--space-lg);
  }
  
  .different-icon {
    width: 56px;
    height: 56px;
  }
  
  .different-icon img {
    width: 28px;
    height: 28px;
  }
}

.challenges .comparison-list li::before {
  color: var(--error);
}

.solutions .comparison-list li::before {
  color: var(--primary);
}

/* Final CTA */
.final-cta {
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
  border-top: 1px solid var(--border-primary);
}

.final-cta h2 {
  color: var(--primary);
  margin-bottom: var(--space-lg);
}

/* Footer */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-primary);
  padding: var(--space-3xl) 0 var(--space-xl) 0;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
}

.footer-logo {
  width: 32px;
  height: 32px;
  filter: brightness(0) invert(1);
}

.footer-links {
  display: flex;
  gap: var(--space-xl);
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
}

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

.footer-bottom {
  text-align: center;
  color: var(--text-muted);
  margin-top: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-primary);
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(10, 15, 28, 0.8);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  animation: modalFadeIn 0.2s ease-out;
}

@keyframes modalFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-content {
  background: var(--bg-card);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-2xl);
  padding: var(--space-3xl);
  box-shadow: var(--shadow-2xl);
  width: 90%;
  max-width: 600px;
  position: relative;
  animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
  from {
    opacity: 0;
    transform: translateY(-20px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.modal-close {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  background: var(--bg-surface);
  border: none;
  border-radius: var(--radius-full);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition-fast);
}

.modal-close:hover {
  background: var(--border-primary);
  color: var(--text-primary);
  transform: scale(1.1);
}

/* Modal Form Elements */
.modal-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-md);
  margin: var(--space-xl) 0;
}

.modal-option {
  background: var(--bg-surface);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  cursor: pointer;
  transition: var(--transition-fast);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.modal-option:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.modal-option.selected {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}

.modal-actions {
  display: flex;
  justify-content: space-between;
  gap: var(--space-md);
  margin-top: var(--space-2xl);
}

.modal-back,
.modal-next,
.modal-submit {
  flex: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
  .hero-ai {
    flex-direction: column;
    text-align: center;
    padding: var(--space-2xl) 0;
  }
  
  .hero-content {
    padding: var(--space-2xl) var(--space-lg);
  }
  
  .hero-devices {
    flex-direction: column;
    gap: var(--space-lg);
  }
  
  .nav-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--bg-card);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    flex-direction: column;
    gap: var(--space-md);
    padding: var(--space-xl);
    min-width: 200px;
    box-shadow: var(--shadow-xl);
    margin-top: var(--space-sm);
    display: none;
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .hamburger {
    display: flex;
  }
  
  .different-container {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
  
  .card-grid,
  .magic-cards,
  .value-prop-cards {
    grid-template-columns: 1fr;
  }
  
  .feature-usecases {
    grid-template-columns: 1fr;
  }
  
  .features-bar {
    flex-direction: column;
    align-items: center;
  }
  
  .hero-ctas {
    justify-content: center;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .section {
    padding: var(--space-3xl) 0;
  }
  
  .section-container {
    padding: 0 var(--space-md);
  }
  
  .modal-content {
    padding: var(--space-xl);
    margin: var(--space-md);
  }
  
  .modal-options {
    grid-template-columns: 1fr;
  }
  
  .modal-actions {
    flex-direction: column;
  }
  
  .feature-usecases {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  
  .usecase-card {
    padding: var(--space-md);
    margin: 0 var(--space-xs);
  }
  
  .feature-panel-content {
    padding: 0 var(--space-sm);
  }
}

/* Animation Enhancements */
.value-prop-highlight {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  background-size: 0% 100%;
  background-repeat: no-repeat;
  background-position: left center;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: background-size 0.3s ease;
}

/* Progress bar for scroll indicator */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  transform-origin: left center;
  transform: scaleX(0);
  z-index: var(--z-fixed);
}

/* Enhanced card animations */
.card {
  transform-style: preserve-3d;
  perspective: 1000px;
}

.card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(0, 217, 255, 0.1), rgba(99, 102, 241, 0.1));
  opacity: 0;
  transition: var(--transition-normal);
  border-radius: var(--radius-xl);
  pointer-events: none;
}

.card:hover::after {
  opacity: 1;
}

/* Enhanced button animations */
.btn {
  transform-style: preserve-3d;
  transition: var(--transition-fast);
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: inherit;
  border-radius: inherit;
  transform: translateZ(-1px);
  filter: blur(20px);
  opacity: 0;
  transition: var(--transition-normal);
}

.btn:hover::before {
  opacity: 0.4;
}

/* Enhanced hero animations */
.hero-image, .hero-phone {
  transform-style: preserve-3d;
  will-change: transform;
}

/* Typewriter cursor effect */
.hero-ai h1::after {
  content: '|';
  animation: blink 1s infinite;
  margin-left: 2px;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* Terminal-style prompt for AI Assistant feature */
.feature-panel-title .terminal-prompt {
  font-family: 'Courier New', 'Monaco', 'Menlo', monospace;
  color: var(--success);
  font-weight: 600;
  margin-right: var(--space-sm);
  font-size: 0.9em;
}

.feature-panel-title .terminal-text {
  font-family: inherit;
}

.feature-panel-title .terminal-cursor {
  font-family: 'Courier New', 'Monaco', 'Menlo', monospace;
  color: var(--primary);
  font-weight: 400;
  animation: terminal-blink 1.2s infinite;
  margin-left: 2px;
}

@keyframes terminal-blink {
  0%, 45% { opacity: 1; }
  46%, 100% { opacity: 0; }
}

.feature-panel[data-feature="2"] .feature-panel-title {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  background: var(--bg-surface);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-primary);
  font-family: inherit;
  position: relative;
  overflow: hidden;
}

.feature-panel[data-feature="2"] .feature-panel-title::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(135deg, var(--success), var(--primary));
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* Smooth scroll behavior */
html {
  scroll-behavior: smooth;
}

/* Enhanced modal animations */
.modal {
  perspective: 1000px;
}

.modal-content {
  transform-style: preserve-3d;
  will-change: transform;
}

/* Feature tab enhanced animations */
.feature-tab {
  transform-style: preserve-3d;
  transition: var(--transition-fast);
}

.feature-tab.active {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow), var(--shadow-lg);
}

/* Use case card enhancements */
.usecase-card {
  transform-style: preserve-3d;
  will-change: transform;
}

/* Different card enhancements */
.different-card {
  transform-style: preserve-3d;
  will-change: transform;
}

/* Logo animation enhancement */
.nav-logo img {
  will-change: transform;
}

/* AOS custom animations */
[data-aos="zoom-in"] {
  transform: scale(0.6);
  opacity: 0;
}

[data-aos="zoom-in"].aos-animate {
  transform: scale(1);
  opacity: 1;
}

[data-aos="fade-left"] {
  transform: translateX(100px);
  opacity: 0;
}

[data-aos="fade-left"].aos-animate {
  transform: translateX(0);
  opacity: 1;
}

/* Performance optimizations */
.hero-ai,
.hero-content,
.hero-visual,
.card,
.btn,
.modal-content {
  will-change: transform;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }

.bg-primary { background: var(--bg-primary); }
.bg-secondary { background: var(--bg-secondary); }
.bg-card { background: var(--bg-card); }

.hidden { display: none; }
.flex { display: flex; }
.grid { display: grid; }

.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }