:root {
  --black: #000000;
  --white: #ffffff;
  --gray-light: #f8f9fa;
  --gray-medium: #6c757d;
  --gray-dark: #212529;
  --shadow-light: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.15);
  --shadow-heavy: 0 8px 32px rgba(0, 0, 0, 0.2);
  --border-radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  height: 100%;
  overflow-x: hidden;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.6;
  color: var(--black);
  background-color: var(--white);
  overflow-x: hidden;
  height: 100vh;
  overflow-y: auto;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  background: linear-gradient(135deg, var(--white) 0%, var(--gray-light) 100%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  width: 100%;
}

.hero-text {
  max-width: 600px;
}

.hero-logo {
  margin-bottom: 24px;
}

.app-logo {
  width: 80px;
  height: 80px;
  border-radius: 18px;
  box-shadow: var(--shadow-medium);
  transition: var(--transition);
}

.app-logo:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-heavy);
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}

.title-line {
  display: block;
}

.hero-description {
  font-size: 1.25rem;
  color: var(--gray-medium);
  margin-bottom: 32px;
  line-height: 1.6;
  max-width: 500px;
}

.hero-features {
  display: flex;
  gap: 32px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
}

.feature-icon {
  font-size: 1.25rem;
}

.app-store-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: var(--black);
  color: var(--white);
  padding: 16px 32px;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.1rem;
  transition: var(--transition);
  box-shadow: var(--shadow-medium);
}

.app-store-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-heavy);
}

.btn-arrow {
  font-size: 1.25rem;
  transition: var(--transition);
}

.app-store-btn:hover .btn-arrow {
  transform: translateX(4px);
}

/* Hero Phones */
.hero-phones {
  position: relative;
  height: 600px;
  display: flex;
  justify-content: center;
  align-items: center;
  perspective: 1000px;
}

.phone {
  position: absolute;
  width: 260px;
  height: auto;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow-heavy);
  transition: var(--transition);
  will-change: transform;
}

.phone img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 24px;
}

.phone-1 {
  z-index: 3;
  left: -80px;
  transform: rotate(-8deg) translateY(-20px);
  animation: float1 6s ease-in-out infinite;
}

.phone-2 {
  z-index: 4;
  left: 50%;
  transform: translateX(-50%) rotate(2deg) translateY(0px);
  animation: float2 6s ease-in-out infinite 2s;
}

.phone-3 {
  z-index: 2;
  right: -80px;
  transform: rotate(6deg) translateY(30px);
  animation: float3 6s ease-in-out infinite 4s;
}

/* Float Animations */
@keyframes float1 {
  0%, 100% { transform: rotate(-8deg) translateY(-20px); }
  50% { transform: rotate(-8deg) translateY(-30px); }
}

@keyframes float2 {
  0%, 100% { transform: translateX(-50%) rotate(2deg) translateY(0px); }
  50% { transform: translateX(-50%) rotate(2deg) translateY(-15px); }
}

@keyframes float3 {
  0%, 100% { transform: rotate(6deg) translateY(30px); }
  50% { transform: rotate(6deg) translateY(20px); }
}

/* Hover Effects */
.phone:hover {
  transform: scale(1.05) !important;
  z-index: 10 !important;
}

/* Stats Section */
.stats {
  padding: 80px 0;
  background: var(--black);
  color: var(--white);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 60px;
  text-align: center;
}

.stat-item {
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition);
}

.stat-item.animate {
  opacity: 1;
  transform: translateY(0);
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 1.1rem;
  color: var(--gray-medium);
  font-weight: 500;
}

/* Features Section */
.features {
  padding: 120px 0;
  background: var(--gray-light);
}

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

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 60px;
  text-align: center;
  letter-spacing: -0.02em;
}

.features-list {
  display: grid;
  gap: 40px;
}

.feature-detail {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 24px;
  align-items: start;
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition);
}

.feature-detail.animate {
  opacity: 1;
  transform: translateY(0);
}

.feature-number {
  font-size: 1rem;
  font-weight: 700;
  color: var(--gray-medium);
  background: var(--white);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 2px solid var(--black);
}

.feature-content h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.3;
}

.feature-content p {
  color: var(--gray-medium);
  font-size: 1.1rem;
  line-height: 1.6;
}

/* Download Section */
.download {
  padding: 100px 0;
  background: var(--white);
  text-align: center;
}

.download-content {
  max-width: 600px;
  margin: 0 auto;
  opacity: 0;
  transform: translateY(30px);
  transition: var(--transition);
}

.download-content.animate {
  opacity: 1;
  transform: translateY(0);
}

.download-title {
  font-size: clamp(2rem, 4vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.download-subtitle {
  font-size: 1.25rem;
  color: var(--gray-medium);
  margin-bottom: 40px;
  line-height: 1.6;
}

.download-btn {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  background: var(--black);
  color: var(--white);
  padding: 20px 40px;
  border-radius: var(--border-radius);
  text-decoration: none;
  transition: var(--transition);
  box-shadow: var(--shadow-medium);
  min-width: 200px;
}

.download-btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-heavy);
}

.download-btn-text {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1;
}

.download-btn-subtitle {
  font-size: 0.9rem;
  opacity: 0.8;
  margin-top: 4px;
}

/* Footer */
.footer {
  padding: 60px 0;
  background: var(--gray-dark);
  color: var(--white);
}

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

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-logo-img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

.brand-name {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.brand-tagline {
  color: var(--gray-medium);
  font-size: 0.9rem;
}

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

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

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

/* Responsive Design */
@media (max-width: 768px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 60px;
    text-align: center;
  }
  
  .hero-phones {
    height: 400px;
  }
  
  .phone {
    width: 180px;
  }
  
  .phone-1 {
    left: -60px;
    transform: rotate(-8deg) translateY(-15px);
  }
  
  .phone-2 {
    transform: translateX(-50%) rotate(2deg) translateY(0px);
  }
  
  .phone-3 {
    right: -60px;
    transform: rotate(6deg) translateY(25px);
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .hero-features {
    justify-content: center;
    gap: 24px;
  }
  
  .footer-content {
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }
  
  .footer-logo {
    flex-direction: column;
    gap: 8px;
  }
  
  .feature-detail {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 16px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  
  .hero-features {
    flex-direction: column;
    align-items: center;
    gap: 16px;
  }
  
  .phone {
    width: 140px;
  }
  
  .phone-1 {
    left: -40px;
  }
  
  .phone-3 {
    right: -40px;
  }
}

/* Animation triggers */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), 
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-animate].animate {
  opacity: 1;
  transform: translateY(0);
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .phone {
    animation: none !important;
  }
}