:root {
  --primary-color: #6366f1;
  --text-color: #1f2937;
  --background-color: #ffffff;
  --card-background: #f3f4f6;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--background-color);
}

.hero {
  text-align: center;
  padding: 4rem 2rem;
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
  color: white;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.subtitle {
  font-size: 1.25rem;
  opacity: 0.9;
}

section {
  padding: 4rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

h2 {
  text-align: center;
  margin-bottom: 2rem;
  font-size: 2rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: var(--card-background);
  padding: 2rem;
  border-radius: 1rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.feature-card h3 {
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

ul {
  list-style-position: inside;
  margin-left: 1rem;
}

.user-list {
  max-width: 800px;
  margin: 0 auto;
}

.user-list li {
  margin-bottom: 0.5rem;
}

.vision p {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 1rem;
}

.cta {
  text-align: center;
  background: var(--card-background);
}

.download-btn {
  display: inline-block;
  background: var(--primary-color);
  color: white;
  padding: 1rem 2rem;
  border-radius: 2rem;
  text-decoration: none;
  margin: 2rem 0;
  font-weight: bold;
  transition: transform 0.2s;
}

.download-btn:hover {
  transform: translateY(-2px);
}

.store-info {
  color: #6b7280;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }

  .subtitle {
    font-size: 1.1rem;
  }

  section {
    padding: 2rem 1rem;
  }
}

.footer {
  background-color: var(--card-background);
  padding: 4rem 2rem 2rem;
  margin-top: 4rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
}

.footer-section h4 {
  color: var(--text-color);
  font-size: 1.2rem;
  margin-bottom: 1rem;
}

.footer-section p {
  color: #6b7280;
}

.footer-section ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: #6b7280;
  text-decoration: none;
  transition: color 0.2s;
}

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

.social-links {
  display: flex;
  gap: 1rem;
}

.social-links a {
  padding: 0.5rem 1rem;
  border: 1px solid #6b7280;
  border-radius: 2rem;
}

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

.footer-bottom {
  max-width: 1200px;
  margin: 3rem auto 0;
  padding-top: 2rem;
  border-top: 1px solid #e5e7eb;
  text-align: center;
  color: #6b7280;
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .footer-section {
    text-align: center;
  }

  .social-links {
    justify-content: center;
  }
}