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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: #333;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Navbar */
.navbar {
  background: #fff;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

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

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: #000;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: #666;
  transition: color 0.3s;
}

.nav-links a:hover {
  color: #000;
}

.btn-download {
  background: #000;
  color: #fff !important;
  padding: 0.5rem 1.5rem;
  border-radius: 8px;
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 8rem 0;
  text-align: center;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

.btn-primary, .btn-secondary {
  padding: 1rem 2rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: transform 0.3s;
}

.btn-primary {
  background: #fff;
  color: #667eea;
}

.btn-secondary {
  background: transparent;
  color: #fff;
  border: 2px solid #fff;
}

.btn-primary:hover, .btn-secondary:hover {
  transform: translateY(-2px);
}

/* Features Section */
.features {
  padding: 6rem 0;
  background: #f9fafb;
}

.features h2 {
  text-align: center;
  font-size: 2.5rem;
  margin-bottom: 4rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 6px rgba(0,0,0,0.05);
  transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.feature-card p {
  color: #666;
}

/* Download Section */
.download {
  padding: 6rem 0;
  text-align: center;
}

.download h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.download p {
  font-size: 1.25rem;
  color: #666;
  margin-bottom: 2rem;
}

.download-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.store-button img {
  height: 60px;
  transition: transform 0.3s;
}

.store-button:hover img {
  transform: scale(1.05);
}

/* Footer */
footer {
  background: #000;
  color: #fff;
  padding: 2rem 0;
  text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .nav-links {
    gap: 1rem;
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
  }
}