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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: #333;
  background: #f9f9f9;
}

header {
  background: white;
  border-bottom: 1px solid #eee;
  padding: 1rem 0;
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

nav h1 {
  font-size: 1.8rem;
  color: #0066cc;
}

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

nav a {
  text-decoration: none;
  color: #333;
  transition: color 0.3s;
}

nav a:hover {
  color: #0066cc;
}

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

section {
  margin: 3rem 0;
}

h2 {
  font-size: 2.2rem;
  margin-bottom: 1rem;
  text-align: center;
}

h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

h4 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.hero {
  text-align: center;
  padding: 3rem 0;
}

.hero h2 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.2rem;
  color: #666;
  margin-bottom: 2rem;
}

.btn-primary {
  background: #0066cc;
  color: white;
  border: none;
  padding: 0.8rem 2rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1rem;
  transition: background 0.3s;
  text-decoration: none;
  display: inline-block;
}

.btn-primary:hover {
  background: #0052a3;
}

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

.card {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.cta {
  background: linear-gradient(135deg, #0066cc, #0052a3);
  color: white;
  padding: 3rem;
  border-radius: 8px;
  text-align: center;
  margin: 3rem 0;
}

.cta p {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
}

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

.plan {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  border: 2px solid #eee;
  text-align: center;
  position: relative;
  transition: transform 0.3s, box-shadow 0.3s;
}

.plan:hover {
  transform: translateY(-8px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.plan.featured {
  border-color: #0066cc;
  box-shadow: 0 4px 12px rgba(0, 102, 204, 0.15);
  transform: scale(1.05);
}

.plan .badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: #0066cc;
  color: white;
  padding: 0.3rem 1rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: bold;
}

.plan h3 {
  margin-bottom: 1rem;
}

.price {
  font-size: 2.2rem;
  font-weight: bold;
  color: #0066cc;
  margin: 1rem 0;
}

.price span {
  font-size: 0.9rem;
  color: #666;
}

.savings {
  color: #27ae60;
  font-weight: bold;
  margin-bottom: 1rem;
}

.plan ul {
  list-style: none;
  text-align: left;
  margin: 2rem 0;
}

.plan li {
  padding: 0.5rem 0;
  border-bottom: 1px solid #eee;
}

.plan li:last-child {
  border-bottom: none;
}

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

.download-card {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  text-align: center;
  border: 2px solid #eee;
  transition: border-color 0.3s;
}

.download-card:hover {
  border-color: #0066cc;
}

.download-card h3 {
  margin-bottom: 1rem;
}

.download-card .version {
  font-size: 0.9rem;
  color: #666;
  margin-bottom: 1rem;
}

.download-card .requirement {
  font-size: 0.85rem;
  color: #999;
  margin-top: 1rem;
}

.faq-item {
  background: white;
  padding: 1.5rem;
  margin-bottom: 1rem;
  border-radius: 4px;
  border-left: 4px solid #0066cc;
}

.faq-item h4 {
  color: #0066cc;
  margin-bottom: 0.5rem;
}

.faq-item p {
  color: #666;
}

.release-notes {
  background: white;
  padding: 2rem;
  border-radius: 8px;
  margin-top: 2rem;
}

footer {
  background: #333;
  color: white;
  text-align: center;
  padding: 2rem;
  margin-top: 3rem;
}

@media (max-width: 768px) {
  nav {
    flex-direction: column;
    gap: 1rem;
  }

  nav ul {
    gap: 1rem;
  }

  .hero h2 {
    font-size: 2rem;
  }

  .plan.featured {
    transform: scale(1);
  }
}