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

    body {
      font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      background: #fafafa;
      color: #111;
      line-height: 1.6;
    }

    header {
      max-width: 1100px;
      margin: 0 auto;
      padding: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    nav a {
      text-decoration: none;
      color: #555;
      margin-left: 24px;
      transition: color 0.2s;
    }

    nav a:hover {
      color: #000;
    }

    .hero {
      max-width: 1100px;
      margin: 0 auto;
      padding: 100px 24px;
      text-align: center;
    }

    .hero h1 {
      font-size: clamp(2.5rem, 6vw, 4.5rem);
      font-weight: 700;
      margin-bottom: 20px;
    }

    .hero p {
      max-width: 650px;
      margin: 0 auto 40px;
      color: #666;
      font-size: 1.1rem;
    }

    .button {
      display: inline-block;
      padding: 14px 28px;
      background: #111;
      color: white;
      text-decoration: none;
      border-radius: 8px;
      transition: opacity 0.2s;
    }

    .button:hover {
      opacity: 0.85;
    }

    .features {
      max-width: 1100px;
      margin: 0 auto;
      padding: 0 24px 80px;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 24px;
    }

    .card {
      background: white;
      padding: 28px;
      border-radius: 12px;
      border: 1px solid #eaeaea;
    }

    .card h3 {
      margin-bottom: 10px;
      font-size: 1.2rem;
    }

    .card p {
      color: #666;
    }

    footer {
      text-align: center;
      padding: 40px 24px;
      color: #888;
      border-top: 1px solid #eee;
      margin-top: 40px;
    }