/* Reset and base styles */
* {
  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;
  background-color: #fff;
}

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

/* Header */
header {
  background: #fff;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: #2563eb;
  text-decoration: none;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

nav a {
  color: #666;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

nav a:hover {
  color: #2563eb;
}

/* Main content */
main {
  min-height: calc(100vh - 200px);
  padding: 2rem 0;
}

/* Hero section */
.hero {
  text-align: center;
  padding: 4rem 0;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  margin-bottom: 3rem;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  font-weight: 800;
}

.hero p {
  font-size: 1.25rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

/* App cards */
.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 2rem 0;
}

.app-card {
  background: white;
  border-radius: 12px;
  padding: 2rem;
  box-shadow: 0 4px 20px rgba(0,0,0,0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.app-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}

.app-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 20px;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 2rem;
  font-weight: bold;
}

.app-name {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: #333;
}

.app-tagline {
  color: #666;
  margin-bottom: 1rem;
}

.play-store-btn {
  display: inline-block;
  background: #000;
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.3s ease;
}

.play-store-btn:hover {
  background: #333;
}

/* Features list */
.features {
  margin: 2rem 0;
}

.features h3 {
  margin-bottom: 1rem;
  color: #333;
}

.features ul {
  list-style: none;
}

.features li {
  padding: 0.5rem 0;
  padding-left: 1.5rem;
  position: relative;
}

.features li:before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #2563eb;
  font-weight: bold;
}

/* Footer */
footer {
  background: #f8f9fa;
  padding: 2rem 0;
  text-align: center;
  border-top: 1px solid #e9ecef;
}

.footer-content {
  color: #666;
}

/* Responsive design */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: 1rem;
  }
  
  nav ul {
    gap: 1rem;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .app-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 15px;
  }
  
  nav ul {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
  
  .hero {
    padding: 2rem 0;
  }
  
  .hero h1 {
    font-size: 1.75rem;
  }
}