body {
  margin: 0;
  padding: 0;
  background: #222;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

#flipbook {
  width: 800px;
  height: 500px;
}

#flipbook .page {
  width: 400px;    /* demi‑largeur pour affichage double page */
  height: 500px;
}

#flipbook .page img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  user‑drag: none;
  user‑select: none;
}

.cover {
  /* Style spécial pour les couvertures */
  box-shadow: 0 0 10px rgba(0,0,0,0.5);
}

.nav-buttons {
  margin-top: 20px;
  text-align: center;
}

.nav-arrow {
  background-color: #ffffff;
  border: none;
  font-size: 2rem;
  padding: 10px 20px;
  margin: 0 10px;
  border-radius: 50px;
  cursor: pointer;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  transition: all 0.3s ease;
}

.nav-arrow:hover {
  background-color: #f0f0f0;
  transform: scale(1.1);
}

.nav-buttons {
  margin-top: 5px;
}