/* CheckAnh Landing Page CSS */
/* Mobile-first responsive design with youthful aesthetic */

/* CSS Variables */
:root {
  /* Colors */
  --mint-green: #00D4AA;
  --coral-pastel: #FF6B6B;
  --light-purple: #A8E6CF;
  --gradient-primary: linear-gradient(135deg, var(--mint-green) 0%, var(--coral-pastel) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--light-purple) 0%, var(--mint-green) 100%);
  --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  
  /* Neutral Colors */
  --white: #FFFFFF;
  --gray-50: #F9FAFB;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-300: #D1D5DB;
  --gray-400: #9CA3AF;
  --gray-500: #6B7280;
  --gray-600: #4B5563;
  --gray-700: #374151;
  --gray-800: #1F2937;
  --gray-900: #111827;
  
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  
  /* Transitions */
  --transition-fast: 0.15s ease-out;
  --transition-normal: 0.3s ease-out;
  --transition-slow: 0.5s ease-out;
}

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

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

body {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--gray-800);
  background-color: var(--white);
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: 2.5rem;
  font-weight: var(--font-weight-bold);
}

h2 {
  font-size: 2rem;
  font-weight: var(--font-weight-bold);
}

h3 {
  font-size: 1.5rem;
  font-weight: var(--font-weight-semibold);
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--gray-600);
}

/* Utility Classes */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.center {
  text-align: center;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-200);
  z-index: 1000;
  transition: var(--transition-normal);
  will-change: transform, background-color;
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-weight: var(--font-weight-bold);
  font-size: 1.25rem;
  color: var(--gray-800);
  text-decoration: none;
}

.nav-logo img {
  border-radius: var(--radius-sm);
}

.nav-menu {
  display: none;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--gray-600);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  padding: 8px 16px;
  border-radius: var(--radius-md);
  will-change: transform, color, background;
}

.nav-link:hover {
  color: var(--white);
  background: var(--gradient-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.nav-link.active {
  color: var(--white);
  background: var(--gradient-primary);
  box-shadow: 0 4px 15px rgba(0, 212, 170, 0.3);
  transform: translateY(-1px);
  font-weight: var(--font-weight-bold);
}

.nav-link.active::after {
  width: 80%;
  background: rgba(255, 255, 255, 0.8);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition-fast);
  transform: translateX(-50%);
}

.nav-link:hover::after {
  width: 80%;
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
}

.bar {
  width: 25px;
  height: 3px;
  background: var(--gray-600);
  border-radius: 2px;
  transition: var(--transition-fast);
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--spacing-3xl) 0 var(--spacing-2xl);
  overflow: hidden;
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: -1;
}

.gradient-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, 
    rgba(0, 212, 170, 0.1) 0%, 
    rgba(255, 107, 107, 0.1) 50%, 
    rgba(168, 230, 207, 0.1) 100%);
}

.floating-elements {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
}

.float-element {
  position: absolute;
  font-size: 2rem;
  opacity: 0.6;
  animation: float 6s ease-in-out infinite;
}

.float-element.camera {
  top: 20%;
  left: 10%;
  animation-delay: 0s;
}

.float-element.location {
  top: 60%;
  right: 15%;
  animation-delay: 1.5s;
}

.float-element.star {
  top: 30%;
  right: 25%;
  animation-delay: 3s;
}

.float-element.heart {
  bottom: 30%;
  left: 20%;
  animation-delay: 4.5s;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(5deg);
  }
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.hero-content {
  text-align: center;
}

.hero-title {
  font-size: 3rem;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-md);
  line-height: 1.1;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--gray-600);
  margin-bottom: var(--spacing-xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  margin-top: 2rem;
}

.hero-visual {
  display: flex;
  justify-content: center;
}

.phone-mockup {
  position: relative;
  max-width: 300px;
  width: 100%;
}

.phone-mockup img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
}

/* CTA Buttons */
.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-lg);
  font-weight: var(--font-weight-semibold);
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition-normal);
  text-decoration: none;
  min-height: 44px;
  min-width: 44px;
}

.cta-button.primary {
  background: var(--gradient-primary);
  color: var(--white);
  box-shadow: var(--shadow-md);
}

.cta-button.primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.cta-button.secondary {
  background: var(--white);
  color: var(--gray-700);
  border: 2px solid var(--gray-200);
}

.hero-cta .cta-button.secondary {
  order: 2;
}

.cta-button.secondary:hover {
  border-color: var(--mint-green);
  color: var(--mint-green);
}

.cta-icon {
  font-size: 1.2rem;
}

/* Hero Download Buttons */
.hero-download-buttons {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  order: 1;
  width: 100%;
}

/* CTA Buttons */
.cta-button {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-lg);
  font-weight: var(--font-weight-semibold);
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition-normal);
  text-decoration: none;
  min-height: 44px;
  min-width: 44px;
}

.cta-button.primary {
  background: var(--gradient-primary);
  color: var(--white);
  box-shadow: var(--shadow-md);
}

.cta-button.primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.cta-button.secondary {
  background: var(--white);
  color: var(--gray-700);
  border: 2px solid var(--gray-200);
}

.hero-cta .cta-button.secondary {
  order: 2;
}

.cta-button.secondary:hover {
  border-color: var(--mint-green);
  color: var(--mint-green);
}

.cta-icon {
  font-size: 1.2rem;
}

/* Hero Download Buttons */
.hero-download-buttons {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  order: 1;
  width: 100%;
}

.hero-download-btn {
  display: inline-block;
  transition: all var(--transition-normal);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  will-change: transform;
  animation: pulse-glow 3s ease-in-out infinite;
}

.hero-download-btn::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  z-index: -1;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.hero-download-btn:hover::before {
  opacity: 1;
  animation: gradient-rotate 2s linear infinite;
}

.hero-download-btn img {
  width: 180px;
  height: auto;
  display: block;
  border-radius: 0;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.hero-download-btn:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 25px rgba(0, 212, 170, 0.3), 0 0 15px rgba(255, 107, 107, 0.2);
}

.hero-download-btn:hover img {
  filter: drop-shadow(0 6px 12px rgba(0, 0, 0, 0.15)) brightness(1.1);
}

.hero-download-btn:active {
  transform: translateY(-1px) scale(1.02);
}

/* Features Overview */
.features-overview {
  padding: var(--spacing-3xl) 0;
  background: var(--gray-50);
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}

.feature-card {
  background: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-normal);
}

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

.feature-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.feature-card h3 {
  color: var(--gray-800);
  margin-bottom: var(--spacing-sm);
}

.feature-card p {
  color: var(--gray-600);
}

/* Section Styles */
.ai-camera, .locations {
  padding: var(--spacing-3xl) 0;
}

.ai-camera {
  background: var(--white);
}

.locations {
  background: var(--gray-50);
}

.section-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}

.section-content.reverse {
  direction: rtl;
}

.section-content.reverse > * {
  direction: ltr;
}

.section-badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--gradient-primary);
  color: var(--white);
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-md);
}

.section-badge.pink {
  background: linear-gradient(135deg, var(--coral-pastel) 0%, #FF8A95 100%);
}

.section-title {
  font-size: 2.5rem;
  color: var(--gray-800);
  margin-bottom: var(--spacing-md);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--gray-600);
  margin-bottom: var(--spacing-xl);
}

.benefits-list {
  margin-bottom: var(--spacing-xl);
}

.benefit-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.benefit-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

/* AI Camera Demo */
.demo-container {
  display: flex;
  justify-content: center;
}

.before-after {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  justify-content: center;
}

.photo-frame {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  max-width: 150px;
}

.photo-frame img {
  width: 100%;
  height: auto;
  display: block;
}

.photo-label {
  position: absolute;
  bottom: var(--spacing-xs);
  left: var(--spacing-xs);
  right: var(--spacing-xs);
  background: rgba(0, 0, 0, 0.7);
  color: var(--white);
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  text-align: center;
}

.arrow-transform {
  font-size: 2rem;
  color: var(--mint-green);
  font-weight: var(--font-weight-bold);
}

/* Locations Gallery */
.locations-gallery {
  display: flex;
  justify-content: center;
}

.gallery-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  max-width: 400px;
}

.location-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
}

.location-card:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

.location-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.location-card.featured img {
  height: 250px;
}

.location-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
  color: var(--white);
  padding: var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: end;
}

.location-overlay h4 {
  margin: 0;
  font-size: 1.125rem;
}

.location-rating {
  font-size: 0.875rem;
  background: rgba(255, 255, 255, 0.2);
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
}

/* Download Section */
.download {
  padding: var(--spacing-3xl) 0;
  background: var(--white);
  text-align: center;
}

.download-content {
  max-width: 800px;
  margin: 0 auto;
}

.download-buttons {
  display: flex;
  gap: var(--spacing-lg);
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  margin-top: var(--spacing-xl);
  padding: var(--spacing-md);
}

.download-btn {
  display: inline-block;
  transition: all var(--transition-normal);
  border-radius: var(--radius-xl);
  overflow: hidden;
  position: relative;
  will-change: transform;
  animation: pulse-glow 3s ease-in-out infinite;
}

.download-btn::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  z-index: -1;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.download-btn:hover::before {
  opacity: 1;
  animation: gradient-rotate 2s linear infinite;
}

.download-btn img {
  width: 180px;
  height: auto;
  display: block;
  border-radius: 0;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.download-btn:hover {
  transform: translateY(-5px) scale(1.05);
  box-shadow: 0 10px 30px rgba(0, 212, 170, 0.3), 0 0 20px rgba(255, 107, 107, 0.2);
}

.download-btn:hover img {
  filter: drop-shadow(0 6px 12px rgba(0, 0, 0, 0.15)) brightness(1.1);
}

.download-btn:active {
  transform: translateY(-2px) scale(1.02);
}

@keyframes pulse-glow {
  0%, 100% {
    box-shadow: 0 0 5px rgba(0, 212, 170, 0.3);
  }
  50% {
    box-shadow: 0 0 20px rgba(0, 212, 170, 0.6), 0 0 30px rgba(255, 107, 107, 0.3);
  }
}

@keyframes gradient-rotate {
    0% {
      background: var(--gradient-primary);
    }
    25% {
      background: linear-gradient(45deg, var(--coral-pastel), var(--light-purple));
    }
    50% {
      background: linear-gradient(45deg, var(--light-purple), var(--mint-green));
    }
    75% {
      background: linear-gradient(45deg, var(--mint-green), var(--coral-pastel));
    }
    100% {
      background: var(--gradient-primary);
    }
  }

/* Teen Effects & Animations */

/* Floating Icons */
.floating-icons {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}

.floating-icon {
  position: absolute;
  font-size: 2rem;
  opacity: 0.6;
  animation: float-up 8s linear infinite;
  will-change: transform;
}

@keyframes float-up {
  0% {
    transform: translateY(100vh) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 0.6;
  }
  90% {
    opacity: 0.6;
  }
  100% {
    transform: translateY(-100px) rotate(360deg);
    opacity: 0;
  }
}

/* Morphing Shapes */
.morphing-shapes {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.morphing-shape {
  position: absolute;
  width: 200px;
  height: 200px;
  background: linear-gradient(45deg, rgba(0, 212, 170, 0.1), rgba(255, 107, 107, 0.1));
  border-radius: 50%;
  animation: morph 10s ease-in-out infinite;
  will-change: transform, border-radius;
}

@keyframes morph {
  0%, 100% {
    border-radius: 50% 50% 50% 50%;
    transform: rotate(0deg) scale(1);
  }
  25% {
    border-radius: 60% 40% 30% 70%;
    transform: rotate(90deg) scale(1.2);
  }
  50% {
    border-radius: 30% 70% 60% 40%;
    transform: rotate(180deg) scale(0.8);
  }
  75% {
    border-radius: 70% 30% 40% 60%;
    transform: rotate(270deg) scale(1.1);
  }
}

/* Gradient Text Animation */
.gradient-text-animated {
  background: var(--gradient-primary);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradient-shift 3s ease-in-out infinite;
}

@keyframes gradient-shift {
  0%, 100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

/* Reveal Animations */
.reveal-element {
  opacity: 0;
  transform: translateY(50px);
  transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal-element.revealed {
  opacity: 1;
  transform: translateY(0);
}

.animate-in {
  animation: slideInUp 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Enhanced Card Hover Effects */
.feature-card, .location-card {
  transition: all var(--transition-normal);
  will-change: transform, box-shadow;
  transform-style: preserve-3d;
}

.feature-card:hover, .location-card:hover {
  transform: translateY(-10px) rotateY(5deg);
  box-shadow: 0 20px 40px rgba(0, 212, 170, 0.2);
}

/* Mobile Optimizations */
@media (max-width: 768px) {
  .floating-icon {
    font-size: 1.5rem;
  }
  
  .morphing-shape {
    width: 150px;
    height: 150px;
  }
  
  .feature-card:hover, .location-card:hover {
    transform: translateY(-5px);
  }
}

/* Reduce Motion for Accessibility */
@media (prefers-reduced-motion: reduce) {
  .floating-icon,
  .morphing-shape,
  .gradient-text-animated,
  .reveal-element {
    animation: none;
  }
  
  .feature-card:hover, .location-card:hover {
    transform: none;
  }
  
  .download-btn {
    animation: none;
  }
}

.app-info {
  margin: var(--spacing-xl) 0;
}

.app-stats {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--mint-green);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--gray-600);
}

.app-screenshots {
  margin-top: var(--spacing-xl);
}

.screenshot-container {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.screenshot-container img {
  width: 150px;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

/* Contact Section */
.contact {
  padding: var(--spacing-3xl) 0;
  background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
}

.contact-content {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.contact-text {
  margin-bottom: var(--spacing-xl);
}

.contact-info {
  display: flex;
  justify-content: center;
}

.contact-card {
  background: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal);
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 212, 170, 0.1), transparent);
  transition: left 0.5s ease;
}

.contact-card:hover::before {
  left: 100%;
}

.contact-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--mint-green);
}

.contact-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  60% {
    transform: translateY(-5px);
  }
}

.contact-card h3 {
  color: var(--gray-800);
  margin-bottom: var(--spacing-sm);
  font-size: 1.5rem;
}

.contact-email {
  display: inline-block;
  color: var(--mint-green);
  text-decoration: none;
  font-weight: var(--font-weight-semibold);
  font-size: 1.125rem;
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  background: linear-gradient(135deg, rgba(0, 212, 170, 0.1), rgba(255, 107, 107, 0.1));
}

.contact-email:hover {
  background: var(--gradient-primary);
  color: var(--white);
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

.contact-description {
  color: var(--gray-600);
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0;
}

/* Footer */
.footer {
  background: var(--gray-800);
  color: var(--white);
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-weight: var(--font-weight-bold);
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-links a {
  color: var(--gray-300);
  text-decoration: none;
  transition: var(--transition-fast);
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--gray-700);
}

.footer-bottom p {
  color: var(--gray-400);
  font-size: 0.875rem;
  margin: 0;
}

/* Responsive Design */
@media (min-width: 640px) {
  .hero-cta {
    flex-direction: column;
    justify-content: center;
    align-items: center;
  }
  
  .hero-download-buttons {
    flex-direction: row;
    gap: var(--spacing-lg);
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .before-after {
    flex-wrap: nowrap;
  }
  
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .download-buttons {
    flex-direction: row;
  }
}

@media (min-width: 768px) {
  .nav-menu {
    display: flex;
  }
  
  .nav-toggle {
    display: none;
  }
  
  .hero-container {
    grid-template-columns: 1fr 1fr;
    text-align: left;
  }
  
  .hero-content {
    text-align: left;
  }
  
  .hero-title {
    font-size: 3.5rem;
  }
  
  .section-content {
    grid-template-columns: 1fr 1fr;
  }
  
  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
    max-width: 600px;
  }
}

@media (min-width: 1024px) {
  .hero-title {
    font-size: 4rem;
  }
  
  .section-title {
    font-size: 3rem;
  }
  
  .container {
    padding: 0 var(--spacing-md);
  }
}

/* Performance Optimizations */
.lazy-load {
  opacity: 0;
  transition: opacity 0.3s;
}

.lazy-load.loaded {
  opacity: 1;
}

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

/* Mobile-specific styles */
@media (max-width: 639px) {
  .hero-content {
    padding: 0 var(--spacing-md);
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.125rem;
  }

  /* Hero Download Buttons Mobile */
  .hero-download-buttons {
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 100%;
  }
  
  .hero-cta .cta-button.secondary {
    margin-top: var(--spacing-md);
    width: auto;
  }

  .hero-download-btn img {
    width: 150px;
    height: auto;
  }

  /* Contact Section Mobile */
  .contact {
    padding: var(--spacing-2xl) 0;
  }

  .contact-content {
    padding: 0 var(--spacing-md);
  }

  .contact-card {
    padding: var(--spacing-lg);
    margin: 0 var(--spacing-sm);
  }

  .contact-icon {
    font-size: 2.5rem;
  }

  .contact-card h3 {
    font-size: 1.25rem;
  }

  .contact-email {
    font-size: 1rem;
    padding: var(--spacing-xs);
  }

  .contact-description {
    font-size: 0.9rem;
  }

  /* Download Section Mobile */
  .download-btn img {
    width: 150px;
    height: auto;
  }
}

/* Tablet-specific styles */
@media (min-width: 640px) and (max-width: 1023px) {
  .hero-download-buttons {
    gap: var(--spacing-lg);
  }

  .hero-download-btn img {
    width: 165px;
    height: auto;
  }

  .contact-card {
    max-width: 500px;
    margin: 0 auto;
  }

  .contact-icon {
    font-size: 2.75rem;
  }

  /* Download Section Tablet */
  .download-btn img {
    width: 165px;
    height: auto;
  }
}

/* Focus styles for keyboard navigation */
.cta-button:focus,
.nav-link:focus,
.download-btn:focus {
  /* outline: 2px solid var(--mint-green);
  outline-offset: 2px; */
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --gray-600: #000000;
    --gray-800: #000000;
  }
}