* {
    box-sizing: border-box;
  }

  body {
    font-family: 'Segoe UI', sans-serif;
    margin: 0;
    padding: 0;
    background: #f4f4f4;
  }

  header {
    background-color: #7c0505;
    color: white;
    text-align: center;
    padding: 1rem;
  }

  .catalogo {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    padding: 1rem;
    max-width: 1200px;
    margin: auto;
  }
  

  .libro {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    overflow: hidden;
    display: flex;
    flex-direction: column;
  }

  .libro img {
    width: 100%;
    height: auto;
    object-fit: cover;
  }

  .libro .contenido {
    padding: 1rem;
  }

  .libro h3 {
    margin-top: 0;
    font-size: 1.2rem;
    color: #333;
  }

  .libro p {
    font-size: 0.95rem;
    color: #666;
  }

  /* Responsive en pantallas pequeñas */
  @media (max-width: 600px) {
    header {
      font-size: 1.3rem;
    }

    .libro h3 {
      font-size: 1rem;
    }

    .libro p {
      font-size: 0.9rem;
    }
  }