/* Reset básico */
body {
  font-family: "Times New Roman", Times, serif;
  margin: 0;
  background: #f8f9fa;
  color: #333;
}

h1, h2 {
  margin: 0 0 15px;
  color: black;
}

a {
  text-decoration: none;
  color: #0077cc;
}

a:hover {
  text-decoration: underline;
}

/* Layout principal */
.container {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 250px;
  background: #4c5256;
  color: white;
  padding: 20px;
}

.sidebar h2 {
  color: #ecf0f1;
  font-size: 18px;
  margin-bottom: 10px;
}

.sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
}

.sidebar li {
  margin: 5px 0;
}

.sidebar a {
  color: #ecf0f1;
  font-size: 14px;
}

/*.sidebar a:hover {
  color: #1abc9c;
}*/

.sidebar .admin-link {
  display: block;
  margin-top: 20px;
  padding: 10px;
  background: #4c5256;
  text-align: left;
  border-radius: 5px;
  color: white;
  text-decoration: none;
  /*border-top: 2px solid #ffffff;  línea superior */
  border-bottom: 1px solid #ffffff; /* línea inferior */
}


.sidebar .admin-link:hover {
  background: #35aabc;
}

/* Logo en sidebar */
.logo-container {
  text-align: center;
  margin-top: 30px;
  padding-top: 15px;
  border-top: 1px solid rgba(255,255,255,0.2);
}

.logo-sidebar {
  max-width: 100%;
  height: auto;
  width: 250px;
  /*filter: brightness(0) invert(1);  Hace visible el logo si es oscuro */
  margin-top: 10px;
}


/* Contenido */
.content {
  flex: 1;
  padding: 30px;
  background: #fff;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 20px;
}

.book {
  background: #f4f4f4;
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 10px;
  text-align: center;
  transition: transform 0.2s;
}

.book:hover {
  transform: translateY(-5px);
  background: #eef;
  text-decoration:none;
}

.book img {
  max-width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 4px;
  margin-bottom: 8px;
}

.book p {
  font-size: 14px;
  /*font-weight: bold;*/
  margin: 0;
  color:black;
}

/* Página de detalle de libro */
.book-detail {
  display: flex;
  gap: 20px;
  background: #f4f4f4;
  padding: 20px;
  border-radius: 8px;
  border: 1px solid #ddd;
  max-width: 800px;
}

.book-detail img {
  border-radius: 4px;
  border: 1px solid #ccc;
}

.book-detail .info p {
  margin: 5px 0;
  font-size: 15px;
}

.back-link {
  display: inline-block;
  margin-top: 10px;
  padding: 8px 12px;
  background-color: #4c5256;
  color: white;
  text-decoration: none;
  border-radius: 5px;
  font-size: 14px;
  transition: background 0.3s;
}

.back-link:hover {
  background-color: #35aabc;
}

/* Vista de autores (listado) */
.listado {
  list-style: none;
  padding: 0;
  margin: 0;
}

.listado li {
  padding: 10px;
  border-bottom: 1px solid #eee;
}

.listado li a {
  text-decoration: none;
  color: #2c3e50;
  font-size: 15px;
  display: block;
  transition: background 0.2s, padding-left 0.2s;
}

.listado li a:hover {
  background: #ecf0f1;
  padding-left: 8px;
  color: #1abc9c;
}

/* Logo en sidebar */
.logo-container {
  text-align: center;
  margin-bottom: 20px;
}

.logo-sidebar {
  max-width: 100%;
  height: auto;
  width: 250px; /* puedes ajustar el tamaño */
  /*filter: brightness(0) invert(1);  si el logo es oscuro, lo hace visible en fondo oscuro */
}