.libros-hero {
  background-image: url('/static/img/contacto-hero.jpg');
  background-size: cover;
  background-position: center;
}

.libros-hero-overlay {
  background: linear-gradient(rgba(8,14,6,0.6), rgba(8,14,6,0.6));
  padding: 20em 0 7em;
  text-align: center;
}

.libros-hero h1 {
  color: var(--color-white);
  margin-bottom: 10px;
}

.libros-hero h4 {
  color: var(--color-white);
  font-family: var(--font-text);
  font-weight: 400;
  font-size: 18px;
}

.libros-resumen {
  padding: 4em 0;
}

.libros-resumen-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.libro-resumen-item {
  text-align: center;
}

.libro-resumen-item img {
  width: 100%;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 15px;
  box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.libro-resumen-item h5 {
  font-size: 17px;
  margin-bottom: 5px;
}

.libro-resumen-estado {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-green-dark);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.libro-detalle {
  padding: 5em 0;
  scroll-margin-top: 100px;
}

.libro-detalle-alt {
  background-color: var(--color-bg-soft);
}

.libro-detalle-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 50px;
  align-items: flex-start;
}

.libro-detalle-portada {
  flex: 1 1 300px;
  max-width: 380px;
  text-align: center;
}

.libro-detalle-portada img {
  width: 100%;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.12);
  margin-bottom: 20px;
}

.libro-detalle-info {
  flex: 2 1 400px;
}

.libro-subtitulo {
  color: var(--color-gray-text);
  font-size: 25px;
  margin-bottom: 20px;
}

.libro-sinopsis p {
  margin-bottom: 15px;
  line-height: 1.6;
}

.libro-mencion {
  display: inline-block;
  background-color: var(--color-bg-soft);
  color: var(--color-green-darker);
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  margin: 15px 0;
}

.libro-precios {
  display: flex;
  gap: 25px;
  margin: 20px 0;
  flex-wrap: wrap;
  justify-content: center;
}

.libro-precio-item {
  display: flex;
  flex-direction: column;
}

.libro-precio-formato {
  font-size: 13px;
  color: var(--color-gray-text);
  text-transform: uppercase;
}

.libro-precio-valor {
  font-size: 28px;
  font-weight: 700;
  font-family: var(--font-heading);
  color: var(--color-dark);
}

.libro-datos-tecnicos {
  list-style: none;
  margin-top: 25px;
  padding-top: 20px;
  border-top: 1px solid var(--color-light-border);
  text-align: left;
}

.libro-datos-tecnicos li {
  font-size: 14px;
  margin-bottom: 8px;
  padding-left: 20px;
  position: relative;
}

.libro-datos-tecnicos li:before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-green);
}

@media (max-width: 1024px) {
  .libros-resumen-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 767px) {
  .libros-resumen-grid {
    grid-template-columns: 1fr;
  }
  .libro-detalle-inner {
    flex-direction: column;
  }
}