header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: #00425f;
      box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    }
    nav a.call {
      background: #00aaff;
      padding: 8px 12px;
      border-radius: 5px;
      margin-left: 10px;
    }
    .plan {
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }
    .plan:hover {
      transform: scale(1.05);
      box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    }
    button, .btn {
      transition: background 0.3s ease, transform 0.2s ease;
    }
    button:hover, .btn:hover {
      background: #0070b8;
      transform: scale(1.02);
    }
    .section {
      opacity: 0;
      transform: translateY(30px);
      animation: fadeUp 0.6s ease forwards;
      animation-delay: 0.2s;
    }
    @keyframes fadeUp {
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }
    body {
      font-family: 'Segoe UI', 'Roboto', sans-serif;
      letter-spacing: 0.3px;
      line-height: 1.6;
      background: #f9f9f9;
    }
    h1, h2, h3 {
      letter-spacing: 1px;
    }
    .cta {
      background: linear-gradient(135deg, #00425f, #0070b8);
      color: #0070b8;
      border-radius: 10px;
    }