body {
  background-color: #000;
  color: #fff;
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0 1rem;
}

header {
  text-align: center;
  padding: 2rem 0;
  border-bottom: 1px solid #444;
}

main {
  max-width: 800px;
  margin: 2rem auto;
}

h1, h2 {
  color: #0f62fe;
}

ul {
  list-style-type: none;
  padding: 0;
}

li {
  padding: 0.5rem 0;
}

a {
  color: #0f62fe;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

footer {
  text-align: center;
  padding: 1rem 0;
  border-top: 1px solid #444;
  font-size: 0.9rem;
  color: #aaa;
}

/* Estilo de la foto del libro */
.foto-libro-container {
  width: 100%;
  display: flex;
  justify-content: center;
  flex-direction: column;
  align-items: center;
}

.foto-libro-texto {
  color: #007bff;
  font-weight: bold;
  text-align: center;
  max-width: 800px;
  margin-bottom: 0.5rem;
}

.foto-libro-borde {
  width: 400px;
  height: 500px;
  border: 2px solid red;
  display: flex;
  justify-content: center;
  align-items: center;
}

.foto-libro-img {
  max-width: 100%;
  max-height: 100%;
}