/* ============================================================
   Biblioteca Municipal de Cabanillas de la Sierra
   style.css — hoja de estilos principal
   ============================================================ */

/* ===== TOKENS ===== */
:root {
  --verde-oscuro:  #1e3a2f;
  --verde-medio:   #2d5a42;
  --verde-claro:   #3d7a59;
  --crema:         #f5f0e8;
  --crema-oscuro:  #ede5d5;
  --crema-borde:   #d4c9b4;
  --dorado:        #c8a96e;
  --dorado-claro:  #e2c98a;
  --texto-oscuro:  #1a1a14;
  --texto-medio:   #3d3d30;
  --texto-suave:   #7a7060;
  --blanco:        #ffffff;
  --sombra-suave:  0 2px 12px rgba(30,58,47,.10);
  --sombra-hover:  0 8px 32px rgba(30,58,47,.22);
  --radio:         4px;
  --radio-lg:      8px;
  --ff-display:    'Playfair Display', Georgia, serif;
  --ff-body:       'Source Serif 4', Georgia, serif;
  --transicion:    .25s ease;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--ff-body);
  background: var(--crema);
  color: var(--texto-oscuro);
  line-height: 1.6;
  font-size: 16px;
}
img { display: block; max-width: 100%; }
a { text-decoration: none; color: inherit; }
button { cursor: pointer; font-family: inherit; }

/* ===== UTILIDADES ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ============================================================
   ① CABECERA
   ============================================================ */
.site-header {
  background: var(--verde-oscuro);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 20px rgba(0,0,0,.35);
}

.header-inner {
  display: grid;
  /* brand | buscador | nav | fondos */
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: 1.5rem;
  padding: 1rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

/* Logo + nombre */
.brand {
  display: flex;
  align-items: center;
  gap: .75rem;
  white-space: nowrap;
}
.brand-icon {
  width: 35px;
  height: 35px;
  /*background: var(--dorado);*/
  border-radius: var(--radio);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}
.brand-text { color: var(--crema); }
.brand-text strong {
  display: block;
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: .02em;
  line-height: 1.2;
}
.brand-text span {
  font-size: .72rem;
  color: var(--dorado-claro);
  letter-spacing: .08em;
  text-transform: uppercase;
}

/* Buscador */
.search-form {
  display: flex;
  gap: 0;
  max-width: 560px;
  width: 100%;
  border: 1.5px solid var(--verde-claro);
  border-radius: var(--radio-lg);
  overflow: hidden;
  background: rgba(255,255,255,.06);
  transition: border-color var(--transicion), box-shadow var(--transicion);
}
.search-form:focus-within {
  border-color: var(--dorado);
  box-shadow: 0 0 0 3px rgba(200,169,110,.20);
}
.search-select {
  background: rgba(255,255,255,.10);
  border: none;
  border-right: 1px solid var(--verde-claro);
  color: var(--crema);
  padding: .6rem .8rem;
  font-family: var(--ff-body);
  font-size: .82rem;
  outline: none;
  cursor: pointer;
  min-width: 100px;
}
.search-select option { background: var(--verde-oscuro); }
.search-input {
  flex: 1;
  background: transparent;
  border: none;
  padding: .6rem 1rem;
  color: var(--crema);
  font-family: var(--ff-body);
  font-size: .9rem;
  outline: none;
}
.search-input::placeholder { color: rgba(245,240,232,.45); }
.search-btn {
  background: var(--dorado);
  border: none;
  padding: .6rem 1.1rem;
  color: var(--verde-oscuro);
  font-weight: 700;
  font-size: .85rem;
  letter-spacing: .04em;
  transition: background var(--transicion);
}
.search-btn:hover { background: var(--dorado-claro); }

/* Nav secundario */
.header-nav { display: flex; gap: 1.5rem; align-items: center; }
.header-nav a {
  color: var(--crema-oscuro);
  font-size: .82rem;
  letter-spacing: .05em;
  text-transform: uppercase;
  opacity: .75;
  transition: opacity var(--transicion), color var(--transicion);
}
.header-nav a:hover { opacity: 1; color: var(--dorado-claro); }

/* .header-fondos es hijo de .header-nav en desktop pero en móvil
   .header-nav se oculta. La píldora de fondos se reposiciona sola
   gracias al grid del header (ver media queries). */
.header-fondos {
  font-size: .72rem;
  color: var(--dorado-claro);
  letter-spacing: .06em;
  background: rgba(200,169,110,.12);
  border: 1px solid rgba(200,169,110,.25);
  padding: .2rem .65rem;
  border-radius: 20px;
  white-space: nowrap;
  opacity: .85;
}

/* ============================================================
   ② BANNER CENTRAL
   ============================================================ */
.banner {
  position: relative;
  height: 480px;
  overflow: hidden;
  background: var(--verde-oscuro);
}
.banner__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .80;
  filter: saturate(.7);
}
.banner__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    160deg,
    rgba(30,58,47,.75) 0%,
    rgba(30,58,47,.30) 60%,
    rgba(0,0,0,.10) 100%
  );
}
.banner__content {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 0 8%;
  max-width: 700px;
}
.banner__kicker {
  font-size: .75rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--dorado-claro);
  margin-bottom: .75rem;
}
.banner__frase {
  font-family: var(--ff-display);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 400;
  font-style: italic;
  color: var(--crema);
  line-height: 1.25;
  text-shadow: 0 2px 16px rgba(0,0,0,.4);
  margin-bottom: 1rem;
}
.banner__autor-frase {
  font-size: .85rem;
  color: var(--dorado-claro);
  letter-spacing: .06em;
}
.banner__decoracion {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  width: 160px;
  height: 160px;
  border: 1.5px solid rgba(200,169,110,.30);
  border-radius: 50%;
  opacity: .6;
}
.banner__decoracion::after {
  content: '';
  position: absolute;
  inset: 15px;
  border: 1.5px solid rgba(200,169,110,.20);
  border-radius: 50%;
}

/* ============================================================
   SECCIÓN RESULTADOS DE BÚSQUEDA
   (aparece DESPUÉS del banner, antes de la zona inferior)
   ============================================================ */
#seccion-resultados {
  display: none;
  background: var(--crema-oscuro);
  border-bottom: 2px solid var(--crema-borde);
  padding: 2.5rem 0 3rem;
}
#seccion-resultados.visible {
  display: block;
  animation: fadeDown .3s ease;
}

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.resultados-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}
.resultados-header h2 {
  font-family: var(--ff-display);
  font-size: 1.25rem;
  color: var(--verde-oscuro);
}
.resultados-header h2 em {
  color: var(--verde-claro);
  font-style: normal;
}
.resultados-info {
  font-size: .8rem;
  color: var(--texto-suave);
  margin-bottom: 1.25rem;
}
.btn-cerrar-resultados {
  background: none;
  border: 1px solid var(--crema-borde);
  color: var(--texto-suave);
  padding: .3rem .8rem;
  border-radius: var(--radio);
  font-size: .8rem;
  transition: all var(--transicion);
}
.btn-cerrar-resultados:hover {
  background: var(--verde-oscuro);
  color: var(--crema);
  border-color: var(--verde-oscuro);
}

/* Paginación */
.paginacion {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--crema-borde);
}
.paginacion__info {
  font-size: .82rem;
  color: var(--texto-suave);
  min-width: 120px;
  text-align: center;
}
.btn-pag {
  background: var(--blanco);
  border: 1.5px solid var(--crema-borde);
  color: var(--texto-medio);
  padding: .5rem 1.25rem;
  border-radius: var(--radio);
  font-family: var(--ff-body);
  font-size: .85rem;
  font-weight: 600;
  letter-spacing: .03em;
  transition: all var(--transicion);
  display: flex;
  align-items: center;
  gap: .4rem;
}
.btn-pag:hover:not(:disabled) {
  background: var(--verde-oscuro);
  color: var(--crema);
  border-color: var(--verde-oscuro);
}
.btn-pag:disabled {
  opacity: .35;
  cursor: not-allowed;
}

/* ============================================================
   GRID DE LIBROS (reutilizable)
   ============================================================ */
.libros-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1.25rem;
}

/* ============================================================
   TARJETA DE LIBRO
   ============================================================ */
.libro-card {
  background: var(--blanco);
  border-radius: var(--radio-lg);
  overflow: hidden;
  box-shadow: var(--sombra-suave);
  cursor: pointer;
  transition: transform var(--transicion), box-shadow var(--transicion);
  position: relative;
}
.libro-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--sombra-hover);
}
.libro-card__cover {
  width: 100%;
  aspect-ratio: 2/3;
  object-fit: cover;
  background: var(--crema-oscuro);
}

/* Placeholder cuando no hay imagen */
.libro-card__cover-placeholder {
  width: 100%;
  aspect-ratio: 2/3;
  background: linear-gradient(145deg, var(--verde-oscuro), var(--verde-medio));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: 1rem;
}
.libro-card__cover-placeholder .ph-icon {
  font-size: 1.8rem;
  opacity: .45;
}
.libro-card__cover-placeholder .ph-no-imagen {
  font-family: var(--ff-display);
  font-size: .65rem;
  color: rgba(245,240,232,.55);
  text-align: center;
  letter-spacing: .06em;
  text-transform: uppercase;
  line-height: 1.4;
  border: 1px solid rgba(245,240,232,.2);
  padding: .2rem .6rem;
  border-radius: 20px;
}

.libro-card__info {
  padding: .65rem .75rem .75rem;
}
.libro-card__titulo {
  font-family: var(--ff-display);
  font-size: .82rem;
  font-weight: 600;
  color: var(--texto-oscuro);
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: .3rem;
}
.libro-card__autor {
  font-size: .72rem;
  color: var(--texto-suave);
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.libro-card__badge {
  position: absolute;
  top: .5rem;
  right: .5rem;
  background: var(--verde-claro);
  color: var(--crema);
  font-size: .6rem;
  letter-spacing: .05em;
  text-transform: uppercase;
  padding: .15rem .45rem;
  border-radius: 20px;
  font-weight: 700;
}
.libro-card__badge.no-disponible {
  background: rgba(0,0,0,.45);
}

/* Sin resultados */
.sin-resultados {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--texto-suave);
}
.sin-resultados .icono { font-size: 3rem; margin-bottom: 1rem; }
.sin-resultados p { font-family: var(--ff-display); font-size: 1.1rem; }
.sin-resultados small { font-size: .85rem; }

/* Spinner */
.spinner {
  display: flex;
  justify-content: center;
  padding: 3rem;
}
.spinner::after {
  content: '';
  width: 36px;
  height: 36px;
  border: 3px solid var(--crema-borde);
  border-top-color: var(--verde-claro);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   ③ ZONA INFERIOR
   ============================================================ */
.zona-inferior {
  padding: 4rem 0 5rem;
}

/* --- Libro recomendado --- */
.seccion-recomendado {
  margin-bottom: 4rem;
}
.seccion-titulo {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 2rem;
}
.seccion-titulo h2 {
  font-family: var(--ff-display);
  font-size: 1.5rem;
  color: var(--verde-oscuro);
  font-weight: 600;
}
.seccion-titulo__linea {
  flex: 1;
  height: 1px;
  background: var(--crema-borde);
}
.seccion-titulo__badge {
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--dorado);
  background: rgba(200,169,110,.12);
  border: 1px solid rgba(200,169,110,.3);
  padding: .2rem .7rem;
  border-radius: 20px;
}

.recomendado-card {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2.5rem;
  background: var(--blanco);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--sombra-suave);
  border: 1px solid var(--crema-borde);
  cursor: pointer;
  transition: box-shadow var(--transicion), transform var(--transicion);
}
.recomendado-card:hover {
  box-shadow: var(--sombra-hover);
  transform: translateY(-2px);
}
.recomendado-card__cover {
  aspect-ratio: 2/3;
  object-fit: cover;
  width: 100%;
  height: 100%;
}
.recomendado-card__cover-placeholder {
  background: linear-gradient(145deg, var(--verde-oscuro), var(--verde-medio));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .75rem;
  padding: 2rem 1rem;
}
.recomendado-card__cover-placeholder .ph-icon {
  font-size: 3rem;
  opacity: .35;
}
.recomendado-card__cover-placeholder .ph-no-imagen {
  font-family: var(--ff-display);
  font-size: .7rem;
  color: rgba(245,240,232,.5);
  text-align: center;
  letter-spacing: .06em;
  text-transform: uppercase;
  border: 1px solid rgba(245,240,232,.2);
  padding: .25rem .7rem;
  border-radius: 20px;
}
.recomendado-card__body {
  padding: 2rem 2rem 2rem 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: .75rem;
}
.recomendado-card__label {
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--dorado);
  font-weight: 700;
}
.recomendado-card__titulo {
  font-family: var(--ff-display);
  font-size: 1.7rem;
  line-height: 1.2;
  color: var(--verde-oscuro);
}
.recomendado-card__autor {
  font-size: .95rem;
  color: var(--texto-suave);
  font-style: italic;
}
.recomendado-card__etiquetas {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
}
.etiqueta-chip {
  font-size: .68rem;
  background: var(--crema-oscuro);
  color: var(--texto-suave);
  padding: .2rem .65rem;
  border-radius: 20px;
  border: 1px solid var(--crema-borde);
  letter-spacing: .03em;
}
.recomendado-card__resumen {
  font-size: .88rem;
  color: var(--texto-medio);
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.recomendado-card__footer {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-top: .5rem;
}
.btn-primary {
  background: var(--verde-oscuro);
  color: var(--crema);
  border: none;
  padding: .6rem 1.4rem;
  border-radius: var(--radio);
  font-family: var(--ff-body);
  font-size: .85rem;
  letter-spacing: .04em;
  transition: background var(--transicion), transform var(--transicion);
}
.btn-primary:hover { background: var(--verde-claro); transform: translateY(-1px); }

.disponibilidad {
  font-size: .78rem;
  color: var(--texto-suave);
  display: flex;
  align-items: center;
  gap: .35rem;
}
.disponibilidad::before {
  content: '';
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #5cad6a;
}
.disponibilidad.no::before { background: #c97b5a; }

/* --- 6 libros aleatorios --- */
.seccion-aleatorios .libros-grid {
  grid-template-columns: repeat(auto-fill, minmax(168px, 1fr));
  gap: 1.5rem;
}

/* ============================================================
   MODAL DE DETALLE
   ============================================================ */
.modal-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10,20,15,.75);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  backdrop-filter: blur(4px);
}
.modal-backdrop.open { display: flex; animation: fadeIn .2s ease; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.modal {
  background: var(--crema);
  border-radius: 12px;
  max-width: 680px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 24px 64px rgba(0,0,0,.45);
  animation: slideUp .25s ease;
}
@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}
.modal__header {
  background: var(--verde-oscuro);
  padding: 1.5rem 1.75rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}
.modal__header-text h3 {
  font-family: var(--ff-display);
  font-size: 1.3rem;
  color: var(--crema);
  line-height: 1.25;
  margin-bottom: .25rem;
}
.modal__header-text p {
  font-size: .85rem;
  color: var(--dorado-claro);
  font-style: italic;
}
.modal__close {
  background: rgba(255,255,255,.10);
  border: none;
  color: var(--crema);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--transicion);
}
.modal__close:hover { background: rgba(255,255,255,.25); }
.modal__body {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 1.5rem;
  padding: 1.75rem;
}
.modal__cover {
  width: 100%;
  border-radius: var(--radio);
  box-shadow: var(--sombra-suave);
}
.modal__cover-placeholder {
  aspect-ratio: 2/3;
  background: linear-gradient(145deg, var(--verde-oscuro), var(--verde-medio));
  border-radius: var(--radio);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: 1rem;
}
.modal__cover-placeholder .ph-icon {
  font-size: 2.5rem;
  opacity: .35;
}
.modal__cover-placeholder .ph-no-imagen {
  font-family: var(--ff-display);
  font-size: .65rem;
  color: rgba(245,240,232,.5);
  text-align: center;
  letter-spacing: .06em;
  text-transform: uppercase;
  border: 1px solid rgba(245,240,232,.2);
  padding: .2rem .6rem;
  border-radius: 20px;
}
.modal__meta { display: flex; flex-direction: column; gap: .6rem; }
.modal__fila {
  display: flex;
  flex-direction: column;
  gap: .1rem;
}
.modal__fila label {
  font-size: .65rem;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--texto-suave);
}
.modal__fila span {
  font-size: .9rem;
  color: var(--texto-oscuro);
}
.modal__resumen {
  padding: 1.25rem 1.75rem 1.75rem;
  font-size: .88rem;
  color: var(--texto-medio);
  line-height: 1.7;
  border-top: 1px solid var(--crema-borde);
}
.modal__resumen h4 {
  font-family: var(--ff-display);
  font-size: .9rem;
  color: var(--verde-oscuro);
  margin-bottom: .5rem;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--verde-oscuro);
  color: rgba(245,240,232,.55);
  text-align: center;
  padding: 2rem;
  font-size: .78rem;
  letter-spacing: .04em;
}
.site-footer a { color: var(--dorado-claro); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  /* Header: marca en fila 1, nav oculto; buscador baja a fila 2 completa */
  .header-inner {
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    gap: .75rem 1rem;
    padding: .75rem 1.25rem;
  }
  .brand         { grid-column: 1; grid-row: 1; }
  .header-fondos { grid-column: 2; grid-row: 1; }  /* píldora arriba a la derecha */
  .header-nav    { display: none; }                 /* enlaces ocultos en móvil */
  .search-form {
    grid-column: 1 / -1;
    grid-row: 2;
    max-width: 100%;
  }

  .recomendado-card {
    grid-template-columns: 150px 1fr;
    gap: 1.5rem;
  }
  .recomendado-card__body { padding: 1.25rem 1.25rem 1.25rem 0; }
  .recomendado-card__titulo { font-size: 1.3rem; }

  .banner { height: 340px; }
  .banner__decoracion { display: none; }
}

@media (max-width: 600px) {
  /* Buscador en móvil: select más corto, botón solo icono */
  .brand-text strong { font-size: .95rem; }

  .search-select {
    min-width: 70px;
    font-size: .75rem;
    padding: .6rem .4rem;
  }
  .search-input {
    font-size: .85rem;
    padding: .6rem .6rem;
    min-width: 0;          /* permite que flex shrink funcione */
  }
  .search-btn {
    padding: .6rem .75rem;
    font-size: 0;          /* oculta el texto */
    letter-spacing: 0;
  }
  .search-btn::after {
    content: '🔍';         /* icono en lugar del texto */
    font-size: 1rem;
  }

  .recomendado-card { grid-template-columns: 1fr; }
  .recomendado-card__cover { max-height: 280px; object-fit: cover; }
  .recomendado-card__body { padding: 1.25rem; }
  .libros-grid { grid-template-columns: repeat(2, 1fr); }
  /* Aleatorios: mismas 2 columnas que búsqueda en móvil.
     Necesita la misma especificidad que la regla de desktop. */
  .seccion-aleatorios .libros-grid { grid-template-columns: repeat(2, 1fr); }
  .modal__body { grid-template-columns: 1fr; }
  .modal__cover { max-width: 140px; }
  .paginacion { flex-wrap: wrap; gap: .75rem; }
}

@media (max-width: 380px) {
  /* Pantallas muy pequeñas (iPhone SE, Galaxy A) */
  .header-inner { padding: .6rem .85rem; }
  .brand-icon { width: 36px; height: 36px; font-size: 1.1rem; }
  .brand-text strong { font-size: .85rem; }
  .brand-text span { display: none; }     /* oculta "Cabanillas de la Sierra" */
  .search-select { display: none; }       /* en pantallas muy pequeñas, búsqueda global */
  .header-fondos {
    font-size: .65rem;
    padding: .15rem .45rem;
  }
}