/* ==========================
   Variables personalizadas
   ========================== */
:root {
  --color-bg-primary: #F8F9FA;
  --color-text-primary: #1C1C1E;
  --color-bg-secondary: #DECAE8;
  --color-button-hover: #495057;
  --color-text-secondary: #212529;
}

/* ==========================
   Estilo del body
   ========================== */
body {
  font-family: 'Poppins', sans-serif;
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
}

/* ==========================
   BARRA ANIMADA
   ========================== */
.barra-color {
  height: 10px;
  background-color: black;
  overflow: hidden;
  position: relative;
}

.barra-color::before {
  content: "";
  position: absolute;
  left: -100%;
  top: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, #1C1C1C, #334A64, #ddd);
  animation: slide 5s linear infinite;
}

@keyframes slide {
  0% { left: -100%; }
  100% { left: 100%; }
}

.card-libro {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
  padding: 0 0.5rem;
}

.card-libro .info-libro {
  min-height: 100px;
}

/* ==========================
   Botones personalizados
   ========================== */
.btn {
  font-size: 1rem;
  text-transform: uppercase;
  padding: 1em 2.5em;
  border-radius: 3em;
  transition: all 0.2s;
  border: none;
  font-weight: 500;
  color: white;
  background-color: var(--color-button-hover);
  position: relative;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.btn::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  border-radius: inherit;
  background-color: #fff;
  z-index: -1;
  transition: all 0.4s;
}

.btn:hover::after {
  transform: scale(1.4);
  opacity: 0;
}

/* ==========================
   Imágenes del carrusel
   ========================== */
.img-carrusel {
  height: 300px;
  object-fit: contain;
  display: block;
  margin: 0 auto;
  border-radius: 5px;
}

/* Carrusel responsive en móviles */
@media (max-width: 768px) {
  .img-carrusel {
    height: 220px;
  }

  .carousel-inner .row {
    flex-wrap: nowrap;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    display: flex;
  }

  .carousel-inner .col {
    flex: 0 0 100%;
    max-width: 100%;
    scroll-snap-align: center;
  }
}

/* ==========================
   Hover en imágenes
   ========================== */
.hover-effect {
  transition: transform 0.3s;
}

.hover-effect:hover {
  transform: scale(1.05);
  cursor: pointer;
}

.hover-effect img {
  transition: transform 0.3s ease;
}

.hover-effect:hover img {
  transform: scale(1.05);
}

/* ==========================
   Página de búsqueda
   ========================== */
main {
  padding: 20px;
  background-color: var(--color-bg-secondary);
}

h1 {
  text-align: center;
  color: var(--color-text-primary);
  font-size: 2rem;
  margin-bottom: 20px;
}

.search-results {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  gap: 20px;
}

.book-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 250px;
  background-color: #fff;
  border-radius: 8px;
  padding: 15px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  text-align: center;
  transition: transform 0.2s ease;
  height: 100%;
  min-height: 460px;
}

.book-card img {
  width: 100%;
  height: auto;
  border-radius: 5px;
}

.book-card h3 {
  margin-top: 1rem;
  font-size: 1.2rem;
}

.book-card p {
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}

.book-card a.btn {
  margin-top: auto;
}

@media (max-width: 768px) {
  .book-card {
    width: 100%;
  }
}

/* ==========================
   Página de información
   ========================== */
.info {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
}

.info h2 {
  margin-bottom: 5%;
  margin-top: 5%;
}

.info img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

/* ==========================
     Carrito
     ========================== */
#btn-carrito {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 101;
  background-color: var(--color-bg-secondary);
  color: white;
  border: none;
  padding: 10px 15px;
  border-radius: 5px;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

#btn-carrito:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(14, 12, 12, 0.3);
  background-color: #ca54eb;
}

#carrito {
  display: none;
  background-color: var(--color-bg-secondary);
  border: 1px solid #ccc;
  padding: 1rem;
  position: fixed;
  right: 20px;
  top: 80px;
  width: 400px;
  max-height: 80vh;
  overflow-y: auto;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  border-radius: 10px;
}

#carrito ul {
  list-style: none;
  padding: 0;
  margin-bottom: 1rem;
}

#carrito li {
  border-bottom: 1px solid #ddd;
  padding: 0.5rem 0;
}

#carrito .btn {
  font-size: 0.9rem;
  padding: 0.25rem 0.75rem;
}

#carrito input.form-control {
  padding: 0.25rem;
  height: 2rem;
  font-size: 0.9rem;
  width: 60px;
}

/* ==========================
   Botón volver arriba
   ========================== */
#btn-subir {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background-color: var(--color-button-hover);
  color: white;
  border: none;
  border-radius: 50%;
  width: 45px;
  height: 45px;
  font-size: 20px;
  cursor: pointer;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
  display: none;
  z-index: 999;
  transition: opacity 0.3s ease;
}

/* ==========================
   Tabs
   ========================== */
.nav-tabs .nav-link {
  color: var(--color-text-primary) !important;
}

/* ==========================
   Footer
   ========================== */
footer {
  background-color: var(--color-bg-primary);
  color: var(--color-text-secondary);
  padding: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.footer-social a {
  color: var(--color-text-secondary);
  text-decoration: none;
  margin: 0 10px;
}

.social-icon {
  width: 20px;
  height: 20px;
  vertical-align: middle;
  margin-left: 5px;
}

@media (max-width: 768px) {
  footer {
    flex-direction: column;
    text-align: center;
  }
}

.social-icon {
  height: 24px;
  width: auto;
  display: inline-block;
  vertical-align: middle;
}

.redes-grupo {
  row-gap: 1rem;
  column-gap: 1.5rem;
}