.bannel {
  margin-top: -10px;
  width: 100%;
  height: 500px;

  background-size: cover;        /* mantiene la imagen bien */
  background-position: center;   /* evita recalculos */
  background-repeat: no-repeat;
  background-attachment: scroll; /* acelera el render */

  position: relative;
}

/*--------------------------------------------------------------*
         Navigation Menu
/*--------------------------------------------------------------*/
  
 .navbar-header{
  margin-top:-440px;
 position: fixed;
 background-color: rgba(0, 0,0,0.2);
 z-index: 100;
  width: 100%;
  height: 70px;
 }


 .logo1 img{
  margin-left:50px;
   height: 50px;
   width: 55px;
   position: relative;
 } 
 
 .navbar-collapse{
  margin-left:260px;
  position: absolute;
    top:10px;
  padding:0px;
}


.navbar-collapse ul {
  margin: 0;
  padding: 0;
  display: flex;
  list-style: none;
  align-content: space-between;
  float: right;
}

.navbar-collapse li {
  position: relative;
}

.navbar-collapse>ul>li {
  position: relative;
  white-space: nowrap;
  padding: 10px 0 10px 24px;
}

.navbar-collapse a,
.navbar-collapse a:focus {
  display: flex;                             
  align-items: center;
  justify-content: space-between;
  padding: 0 3px;
  font-size: 16px;
  color: rgba(255, 255, 255, 0.7);
  white-space: nowrap;
  transition: 0.3s;
  position: relative;
}

.navbar-collapse a i,
.navbar-collapse a:focus i {
  font-size: 12px;
  line-height: 0;
  margin-left: 5px;
  background-color:rgba(0, 0, 0, .12);
  }

.navbar-collapse>ul>li>a:before {
  content: "";
  position: absolute;
  width: 100%;
  height: 2px;
  bottom: -5px;
  left: 0;
  background-color: #f6b024;
  visibility: hidden;
  width: 0px;
  transition: all 0.3s ease-in-out 0s;
}

.navbar-collapse a:hover:before,
.navbar-collapse li:hover>a:before,
.navbar-collapse .active:before {
  visibility: visible;
  width: 100%;
}

.navbar-collapse a:hover,
.navbar-collapse .active,
.navbar-collapse .active:focus,
.navbar-collapse li:hover>a {
  color: #fff;
  
}

.navbar-collapse .dropdown ul {
  display: block;
  position: absolute;
  left: 14px;
  top: calc(100% + 30px);
  margin: 0;
  padding: 10px 0;
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  background: #fff;
  box-shadow: 0px 0px 30px rgba(127, 137, 161, 0.25);
  transition: 0.3s;
  border-radius: 8px;
}

.navbar-collapse .dropdown ul li {
  min-width: 150px;
}

.navbar-collapse .dropdown ul a {
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  text-transform: none;
  color: #032e54;
}

.navbar-collapse .dropdown ul a i {
  font-size: 12px;
}

.navbar-collapse .dropdown ul a:hover,
.navbar-collapse.dropdown ul .active:hover
.navbar-collapse .dropdown ul li:hover>a {
  color: #0880e8;
  background-color: rgba(0, 0, 0, .2);
  border-radius: 10px;
}

.navbar-collapse .dropdown:hover>ul {
  opacity: 1;
  top: 100%;
  visibility: visible;
}

.navbar-collapse .dropdown .dropdown ul {

  top: 0;
  left: calc(100% - 30px);
  visibility: hidden;
}

.navbar-collapse .dropdown .dropdown:hover>ul {
  opacity: 1;
  top: 0;
  left: 100%;
  visibility: visible;
}

/* ======================
   Menú responsive OMP 3.9
====================== */

/* Para pantallas ≤ 944px */
@media screen and (max-width: 944px) {
  .navbar-collapse {
    margin-left: 180px;
    margin-top: 7px;
    position: absolute;
    padding: 0;
  }
  .logo {
    position: absolute;
    margin-top: 5px;
    margin-left: 40px;
  }
}

/* Para pantallas ≤ 813px */
@media screen and (max-width: 813px) {
  .navbar-collapse {
    margin-left: 140px;
    margin-top: 7px;
    position: absolute;
  }
  .logo {
    position: absolute;
    margin-top: 5px;
    margin-left: 15px;
  }
}

/* Para pantallas ≤ 788px: menú toggle abierto */
@media screen and (max-width: 788px) {

  /* Contenedor collapse */
  .navbar-collapse {
    margin-left: 85px;
    margin-top: 7px;
    position: absolute;
    display: none; /* oculto hasta activar toggle */
  }

  /* Logo */
  .logo {
    position: absolute;
    margin-top: 5px;
    margin-left: 15px;
  }

  /* Menú toggle activo */
  .collapse.navbar-collapse.in {
    display: block;
    margin-top: 75px;
    margin-left: -15px;
    background-color: rgba(0, 0, 0, 0.5);
  }

  /* Ul del menú */
  .collapse.navbar-collapse.in .nav-aux {
    display: flex;
    flex-direction: column; /* items verticales */
    position: relative;
    margin: 0 auto;
    padding: 0;
     width: 90vw; /* 90% del ancho de la ventana */
  max-width: 400px; /* opcional: no más ancho de 400px */  
    border-radius: 8px;
    box-shadow: inset 2px 2px 6px #bebebe, inset -2px -2px 6px #ffffff;
    /* scroll eliminado */
  }

  /* Items del menú */
  .collapse.navbar-collapse.in .nav-aux > li {
    width: 120px;          /* ancho fijo para uniformidad */
    margin: 5px auto;      /* centrado horizontal */
    padding: 10px 15px;
    box-sizing: border-box;
  }

  /* Links de los items */
  .collapse.navbar-collapse.in .nav-aux > li > a {
    display: block;
    text-align: center;
    color: #fff;   /* letras blancas */
  }

  /* Dropdowns */
  .collapse.navbar-collapse.in .nav-aux li.dropdown > ul.dropdown-menu {
    width: 120px;          /* igual que el li padre */
    border-radius: 6px;
  }

  /* Links dentro de dropdowns */
  .collapse.navbar-collapse.in .nav-aux li.dropdown > ul.dropdown-menu li a {
    display: block;
    text-align: center;
    padding: 8px 10px;
  }
}

/*--------------------------------------------------------------*
         Navar header scroll
/*--------------------------------------------------------------*/

.navbar-header.scrolled {
  background:rgba(0, 0, 0, 1);
  box-shadow: 0 2px 5px rgba(0,0,0,0.5);
 }
 /*--------------------------------------------------------------
# segunda barra nav
--------------------------------------------------------------*/
.container-2{
  top: 490px;
  position: absolute;
  width: 100%;
  height: 40px;
  background: linear-gradient(to bottom, #adb5bd, #e9ecef);
  display: flex;
  justify-content: center; /*  Centra horizontalmente todo el contenido */
  align-items: center;     /* Centra verticalmente los elementos */
}

.navbar2 {
  position: relative;
  padding: 0;
}

.navbar2 ul {
  margin: 0;
  padding: 0;
  display: flex;
  list-style: none;
  align-items: center;
  justify-content: center; /* Centra los <li> dentro del ul */
}

.navbar2 li {
  position: relative;
}

.navbar2>ul>li {
  white-space: nowrap;
  padding: 10px 24px;
}

/* Enlaces */
.navbar2 a,
.navbar2 a:focus {
  display: flex;
  align-items: center;
  justify-content: center; /* Centra el contenido del enlace */
  padding: 0 3px;
  font-size: 16px;
  color: #000000;
  white-space: nowrap;
  transition: 0.3s;
  position: relative;
}

/* Línea animada */
.navbar2>ul>li>a:before {
  content: "";
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -5px;
  left: 0;
  background-color: #f6b024;
  visibility: hidden;
  transition: all 0.3s ease-in-out;
}

.navbar2 a:hover:before,
.navbar2 li:hover>a:before,
.navbar2 .active:before {
  visibility: visible;
  width: 100%;
}

/* Dropdowns */
.navbar2 .dropdown ul {
  display: block;
  position: absolute;
  left: 50%;          /* Centra el dropdown respecto al li */
  transform: translateX(-50%);
  top: calc(100% + 10px);
  margin: 0;
  padding: 10px 0;
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  background: #fff;
  box-shadow: 0px 0px 30px rgba(127, 137, 161, 0.25);
  transition: 0.3s;
  border-radius: 8px;
}

.navbar2 .dropdown:hover>ul {
   width: 180px;
  opacity: 1;
  visibility: visible;
   color: #000000;
}

.navbar2 .dropdown ul a {
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 500;
  text-transform: none;
  color: #032e54;
}

.navbar2 .dropdown ul a i {
  font-size: 12px;
}

.navbar2 .dropdown ul a:hover,
.navbar2.dropdown ul .active:hover,
.navbar2 .dropdown ul li:hover>a {
  color: #0880e8;
  background-color: rgba(0, 0, 0, .2);
  border-radius: 10px;
 }

/* Responsividad */
@media screen and (max-width: 1029px) {
  .container-2 {
    justify-content: center; /* Sigue centrando */
  }
}

@media screen and (max-width: 814px) {
  .container-2 {
    justify-content: center; /* Sigue centrando */
    flex-wrap: wrap; 
    height:40px;        /* Permite que los elementos bajen de línea */
  }

  .navbar2 ul {
    flex-direction: column;
    align-items: center;
  }

}

  /*--------------------------------------------------------------
# carrusel
--------------------------------------------------------------*/
 #hero{
  top:75px;
  background-color:rgba(0, 0, 0, .1) ;
  width: 100%;
  height:425px;
  position: absolute;
   overflow: hidden;
  }
  #heroCarousel{
    bottom: 20px;
  }
  
  #hero:before {
    content: "";
    position: relative;
    bottom: 0;
    top: 0;
    left: 0;
    right: 0;
  }
  
  #hero .carousel-container {
    margin-bottom:30px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
     text-align: center;
    bottom:0;
    top: 0;
    left: 0;
    right: 0;
  }
  
  #hero h2 {
    font-family:'Poppins', Tahoma, Verdana, sans-serif;
    color: #fff;
    margin-bottom:20px;
     font-size: 2.8rem;
    font-weight:550;
     letter-spacing: 1px; 
      text-shadow: 0 4px 10px rgba(0, 0, 0, 1.5);
     
  }
  
  #hero p {
    font-family:'Poppins',Tahoma, Verdana, sans-serif;
    width: 80%;
    animation-delay: 0.4s;
    margin: 0 auto 30px auto;
     font-size: 1.9rem;  
     line-height: 1.4;
      letter-spacing: 0.5px;
    color:#f1c40f;
      text-shadow: 0 4px 10px rgba(0, 0, 0, 1.5);
  }


  
  #hero .carousel-control-prev,
  #hero .carousel-control-next {
    bottom:60px;
    width: 15%;
  }
  
  #hero .carousel-control-next-icon,
  #hero .carousel-control-prev-icon {
    font-size:35px;
    line-height:1;
    width:30%;
    height:200px;
  }

  #hero .btn-get-started {
    font-family: "Raleway", sans-serif;
    font-weight: 500;
    font-size: 14px;
    letter-spacing: 1px;
    display: inline-block;
    padding: 12px 32px;
    border-radius: 30px;
    transition: 0.5s;
    line-height: 1;
    margin: 10px;
    color: #fff;
    animation-delay: 0.8s;
    border: 2px solid #f6b024;
  }
  
  #hero .btn-get-started:hover {
    background: #f6b024;
    color: #fff;
    text-decoration: none;
  }


  @media (min-width: 1015px) {
    #hero p {
      width: 65%;
    }
  
    #hero .carousel-control-prev,
    #hero .carousel-control-next {
      width: 15%;
    }
  }

  @media (max-width: 1016),
(max-height: 400px) {
  #hero {
    top:85px;
    height: 400px;
   
  }
.navbar2{
  margin-left:300px;
  position: absolute;
  margin-top: 7px;
  padding: 0;
}

.navbar2 ul {
  margin: 0;
  padding: 0;
  display: flex;
  list-style: none
 
}
  }



 
/*-------------------------------------------------------------
  book miniatura de todo el catalogo menos de la categorias 
 /*-------------------------------------------------------------*/
    
  .book-conten{
       position:relative;
       width:85px;
       display: block;
        -webkit-perspective: 1200px;
      -moz-perspective: 1200px;
      perspective: 1200px
}

.book-2 {
    z-index: 5;
    box-shadow: 2px 2px 6px rgba(0,0,0,0.7);
    -webkit-transition: 0.75s;
    -moz-transition: 0.75s;
    transition: 0.75s;
    -webkit-transform-style: preserve-3d;
    -moz-transform-style: preserve-3d;
    transform-style: preserve-3d;
    -webkit-transform-origin: 125px 0;
    -moz-transform-origin: 125px 0;
    transform-origin: 125px 0
}

.book-2:after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    left: 3px;
    width: 7px;
    background: url(https://3.bp.blogspot.com/-9KyPk9T8yko/U2bDJq8s52I/AAAAAAAAPzM/OvSY7JUf-tY/s1600/ridge.png) repeat-y;
    z-index: 20;
   
}

.book-2:hover {
    -webkit-transform: translateX(10px) rotateY(35deg);
  -moz-transform: translateX(10px) rotateY(35deg);
  transform: translateX(10px) rotateY(35deg);
}

.book-covertor {
    position: relative;
    z-index: 10;
}



.book-covertor h2 {
    bottom: 0;
    right: 0;
    font-family: courier;
    font-size: 30%
}

.book-covertor img {
    vertical-align:bottom;
    max-width: 100%;
    background-size: cover;
    height:auto;
}

.book-line {
    color: #fff;
    position: absolute;
    bottom: 0;
    top: 0;
    width:30px;
    z-index: 5;
    overflow: hidden;
    box-shadow: 2px 2px 6px rgba(0,0,0,0.7);
    background: url(https://1.bp.blogspot.com/-m1-zHVG6p7g/U2bIYfsLUfI/AAAAAAAAPzg/oCcoC-RFFug/s1600/portada.jpg) -64px 0 no-repeat;
    background-size: auto 100%;
    -webkit-transform: rotateY(-80deg) translateX(-30px);
    -moz-transform: rotateY(-80deg) translateX(-30px);
    transform: rotateY(-80deg) translateX(-30px);
    -webkit-transform-origin: 0 0;
    -moz-transform-origin: 0 0;
    transform-origin: 0 0
}

.book-line h1 {
    display: block;
    width:500px;
    text-align: left;
    color: #fff;
    position: absolute;
    top: 0;
    left: 39px;
    text-indent: 15px;
    text-transform: uppercase;
    font-family: Helvetica,Arial,sans-serif;
    font-size: 2em;
    opacity: 0.75;
    font-weight: normal;
    -webkit-font-smoothing: antialiased;
    -webkit-transform: rotateZ(90deg);
    -moz-transform: rotateZ(90deg);
    transform: rotateZ(90deg);
    -webkit-transform-origin: 0 0;
    -moz-transform-origin: 0 0;
    transform-origin: 0 0
}

.book-line:before {
    display: block;
    content: "";
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.3)
}

  /*-------------------------------------------------------------*
  # Buscador responsive
/*-------------------------------------------------------------*/

.form-form {
  position: relative;
  width: 800px;
  height: 40px;
  border-radius:5px;
}

.btn1 {
  position: relative;
  top: 0px;
  width: 75px;
  height: 40px;
  background-color: #0880e8;
  margin-left: -15px;
   display: inline-block;
    vertical-align: middle;
}
 /* ----- Responsivo ----- */

@media (max-width: 1030px) { 
  .form-form {
    width: 590px;
  }
}

@media (max-width: 992px) { 
  .form-form {
    margin-bottom: 0px;
    width: 400px;
  }
}

/* 560px – 769px */
@media (max-width: 768px) and (min-width: 560px) { 
  .form-form {
  position: absolute;
    margin-left: -220px;
    margin-bottom: 5px;
    width: 350px;
  }

  .btn1 {
    position:absolute;
    width: 75px;
    height: 40px;
    margin-left: 120px;
    top: 22px;
     display: inline-block;
    vertical-align: middle;
  }
}

@media (max-width: 560px) and (min-width:200px) { 
  .form-form {
    position: absolute;
    margin-left: -190px;
    margin-bottom: 5px;
    width:250px;
  }

  .btn1 {
    position: absolute;
    width: 75px;
    height: 40px;
    margin-left: 50px;
    top:21px;
  }
}


/*--------------------------------------------------------------*
         efecto de las card de las categorias cientificas 
/*--------------------------------------------------------------*/
  
 .books .card{
  border-style:  solid;               /* borde sutil */
  border-radius: 15px;                  /* esquinas redondeadas */
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1); /* sombra ligera por defecto */
  transition: all 0.3s ease;            /* animación suave */
}

/* Hover: sombra más pronunciada y pequeño “zoom” */
 .books.card:hover {
  transform: translateY(-5px);          /* se eleva un poco */
  box-shadow: 0 8px 20px rgba(0, 0, 0, 1.25); /* sombra más profunda */
  border-color: #0d6efd;  /* opcional: resalta el borde azul */
}

/* Imagen dentro de la tarjeta */
.card img {
  border-top-left-radius: 10px;
  border-top-right-radius: 10px;
  transition: transform 0.3s ease;
}

/* Efecto zoom en imagen */
.card:hover img {
  transform: scale(0.90);
}

/* Opcional: animar el título */
.card-title {
  transition: color 0.3s ease;
}

.card:hover .card-title {
  color: #000000; /* cambia a negro */
}



/* ======== SOLO PÁGINA DEL LIBRO ======== */
/* Contenedor principal */
.pkp_op_book {
    color: #000 !important;
}

/* Estilo para todos los items */
.pkp_op_book .item {
    color: #000 !important;
}

/* Estilo para todos los labels */
.pkp_op_book .label {
    color: #000 !important;
    font-weight: 600; /* opcional: hace el label más fuerte */
}

/* Links dentro de labels o items */
.pkp_op_book .item a,
.pkp_op_book .label a {
    color: #000 !important;
}

.page .item,
.page .label,
.page .sub_item,
.page .value {
    color: #000 !important;
}