:root {
    --primary-color: #4CAF50;
    --secondary-color: #2196F3;
    --text-color: #333;
    --light-gray: #f5f5f5;
    --border-radius: 8px;
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
  }
  
  header {
    background: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
  }
  
  nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
  }
  
  .logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--primary-color);
    justify-content: center;
  }
  
  .nav-links {
    display: flex;
    gap: 2rem;
  }
  
  .nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
  }
  
  .nav-links a.active {
    color: var(--primary-color);
  }
  
  main {
    margin-top: 80px;
    padding: 2rem;
  }
  
  .hero {
    text-align: center;
    padding: 4rem 0;
  }
  
  .hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
  }
  
  .pricing-cards {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 2rem;
  }
  
  .card {
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    position: relative;
    transition: transform 0.3s ease;
  }
  
  .card:hover {
    transform: translateY(-5px);
  }
  
  .most-popular {
    position: absolute;
    top: -12px;
    right: 2rem;
    background: var(--secondary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    font-size: 0.875rem;
  }
  
  .card h2 {
    margin-bottom: 1rem;
    color: var(--primary-color);
  }
  
  .price {
    margin-bottom: 2rem;
  }
  
  .amount {
    font-size: 2.5rem;
    font-weight: bold;
  }
  
  .period {
    color: #666;
  }
  
  .savings {
    color: var(--primary-color);
    font-weight: bold;
    margin-bottom: 1rem;
  }
  
  .features {
    list-style: none;
    margin-bottom: 2rem;
  }
  
  .features li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
  }
  
  .features li::before {
    content: "✓";
    color: var(--primary-color);
    position: absolute;
    left: 0;
  }
  
  .subscribe-btn {
    width: 100%;
    padding: 1rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s ease;
  }
  
  .subscribe-btn:hover {
    background-color: #388E3C;
  }
  
  footer {
    background: var(--light-gray);
    padding: 4rem 2rem;
    margin-top: 4rem;
  }
  
  .footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
  }
  
  .footer-section h3 {
    margin-bottom: 1rem;
  }
  
  .footer-section a {
    display: block;
    color: var(--text-color);
    text-decoration: none;
    margin-bottom: 0.5rem;
  }
  
  .footer-section a:hover {
    color: var(--primary-color);
  }
  
  @media (max-width: 768px) {
    .pricing-cards {
      grid-template-columns: 1fr;
    }
    
    .nav-links {
      display: none;
    }
    
    .hero h1 {
      font-size: 2rem;
    }
  }