body {
  background-color: #f5f5f2;
  color: #222;
  font-family: Arial, sans-serif;
  margin: 40px;
}
.texto {
  border: 1px solid #999;
  padding: 20px;
  max-width: 500px;
}
 <style>
    body {
      font-family: serif;
      background: #f5f5f5;
      color: #111;
      margin: 0;
      padding: 0;
    }
    .container {
      max-width: 900px;
      margin: auto;
      padding: 40px 20px;
    }
    h1 {
      font-size: 2.2rem;
      margin-bottom: 10px;
    }
    p {
      line-height: 1.6;
      font-size: 1rem;
    }
    .grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
      gap: 20px;
      margin-top: 40px;
    }
    .item img {
      width: 100%;
      display: block;
      border-radius: 4px;
    }
   .whatsapp {
  display: inline-block;
  margin-top: 30px;
  padding: 14px 22px;
  background: #111;
  color: #fff;
  text-decoration: none;
  border-radius: 4px;
  font-weight: bold;
}

    footer {
      margin-top: 80px;
      font-size: 0.9rem;
      opacity: 0.7;
    }
  </style>