/* Visor de catálogos SASGA */

:root {
  --sasga-marca: #1b2b4b;  /* azul corporativo */
  --sasga-tinta: #14202a;
}

/* ---------- Reset ----------
   El tema y Elementor pintan los <button> del sitio (bordes y fondos rojos).
   Estos controles son un widget inyectado, así que se neutraliza esa herencia. */
.sasga-visor-fondo button {
  -webkit-appearance: none !important;
  appearance: none !important;
  background-image: none !important;
  border: 0 !important;
  box-shadow: none !important;
  text-shadow: none !important;
  text-transform: none !important;
  letter-spacing: normal !important;
  font: inherit !important;
  line-height: 1 !important;
  margin: 0 !important;
  min-width: 0 !important;
  min-height: 0 !important;
  border-radius: 0;
}
.sasga-visor-fondo button:hover,
.sasga-visor-fondo button:focus,
.sasga-visor-fondo button:active {
  border: 0 !important;
  box-shadow: none !important;
}
.sasga-visor-fondo :focus-visible { outline: 2px solid var(--sasga-marca); outline-offset: 2px; }

.sasga-visor-fondo {
  position: fixed;
  inset: 0;
  z-index: 999999;
  display: flex;
  flex-direction: column;
  opacity: 0;
  transition: opacity .28s ease;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  /* Desenfoque fuerte del contenido de detrás.
     El color de respaldo cubre los navegadores sin backdrop-filter. */
  background: rgba(244, 246, 247, .92);
}
@supports ( backdrop-filter: blur(1px) ) or ( -webkit-backdrop-filter: blur(1px) ) {
  .sasga-visor-fondo {
    background: rgba(240, 243, 245, .62);
    -webkit-backdrop-filter: blur(28px) saturate(1.25);
    backdrop-filter: blur(28px) saturate(1.25);
  }
}
.sasga-visor-fondo.visible { opacity: 1; }
body.sasga-visor-abierto { overflow: hidden; }

/* ---------- Barra superior ---------- */
.sasga-visor-barra {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .45rem 1rem;
  color: var(--sasga-tinta);
  flex-shrink: 0;
  min-height: 2.9rem;
  border-bottom: 1px solid rgba(20, 32, 42, .1);
}
.sasga-visor-titulo {
  font-size: .95rem;
  font-weight: 600;
  letter-spacing: -.005em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 45vw;
}
.sasga-visor-acciones { display: flex; align-items: center; gap: .25rem; }

.sasga-visor-btn {
  background: transparent !important;
  color: var(--sasga-marca) !important;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 6px !important;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background .15s ease, color .15s ease;
  padding: 0 !important;
}
.sasga-visor-btn:hover, .sasga-visor-btn:focus-visible {
  background: rgba(27, 43, 75, .1) !important;
  color: var(--sasga-marca) !important;
}
.sasga-visor-btn:disabled { opacity: .3; cursor: default; }
.sasga-visor-btn svg { width: 1.25rem; height: 1.25rem; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.sasga-visor-btn.activo { background: rgba(27, 43, 75, .16) !important; color: var(--sasga-marca) !important; }

/* ---------- Zona del libro ----------
   Las flechas van superpuestas sobre el documento, para que el libro
   aproveche todo el ancho disponible. */
.sasga-visor-escena {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: .35rem;
  min-height: 0;
  position: relative;
}
.sasga-visor-marco {
  flex: 1 1 auto;
  min-width: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sasga-visor-libro { touch-action: pan-y; }
.sasga-visor-libro .stf__item { background: #fff; }
.sasga-pagina {
  background: #fff;
  width: 100%;
  height: 100%;
  display: block;
}
.sasga-pagina img { width: 100%; height: 100%; object-fit: contain; display: block; }

/* Flechas: superpuestas sobre el documento, en negro.
   Llevan un disco claro detrás para que se lean sobre cualquier página. */
.sasga-visor-escena > .sasga-visor-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 6;
}
.sasga-visor-escena > .sasga-visor-nav:first-of-type { left: clamp(.4rem, 1.5vw, 1.1rem); }
.sasga-visor-escena > .sasga-visor-nav:last-of-type  { right: clamp(.4rem, 1.5vw, 1.1rem); }

.sasga-visor-nav {
  flex: 0 0 auto;
  /* Medidas fijas en los cuatro sentidos: el tema añade padding y min-width a
     los botones, y eso deformaba el círculo. */
  box-sizing: border-box !important;
  width: 3.1rem !important;
  height: 3.1rem !important;
  min-width: 3.1rem !important;
  min-height: 3.1rem !important;
  max-width: 3.1rem !important;
  max-height: 3.1rem !important;
  aspect-ratio: 1 / 1;
  border-radius: 50% !important;
  background: rgba(255, 255, 255, .86) !important;
  color: #000 !important;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 !important;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(13, 23, 32, .18) !important;
  transition: background .15s ease, opacity .15s ease, transform .15s ease;
}
.sasga-visor-nav:hover:not(:disabled) { background: #fff !important; }
.sasga-visor-escena > .sasga-visor-nav:hover:not(:disabled) { transform: translateY(-50%) scale(1.06); }
.sasga-visor-escena > .sasga-visor-nav:active:not(:disabled) { transform: translateY(-50%) scale(.96); }
.sasga-visor-nav:disabled { opacity: .18; cursor: default; }
.sasga-visor-nav svg { width: 1.75rem; height: 1.75rem; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- Barra inferior ---------- */
.sasga-visor-pie {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: .4rem 1rem;
  color: #4a5a66;
  font-size: .85rem;
  flex-shrink: 0;
  border-top: 1px solid rgba(20, 32, 42, .08);
}
.sasga-visor-contador { font-variant-numeric: tabular-nums; min-width: 7rem; text-align: center; }

/* ---------- Índice de miniaturas ---------- */
.sasga-visor-indice {
  position: absolute;
  inset: auto 0 0 0;
  max-height: 0;
  overflow: hidden;
  background: rgba(255, 255, 255, .96);
  border-top: 1px solid rgba(20, 32, 42, .12);
  transition: max-height .3s ease;
  z-index: 10;
}
.sasga-visor-indice.abierto { max-height: 42vh; overflow-y: auto; }
.sasga-visor-miniaturas {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  gap: .6rem;
  padding: 1rem;
}
.sasga-mini {
  background: none !important;
  border: 2px solid transparent;
  border-radius: 3px;
  padding: 0;
  cursor: pointer;
  overflow: hidden;
  transition: border-color .15s ease, transform .15s ease;
}
.sasga-mini:hover { transform: translateY(-2px); border-color: rgba(20, 32, 42, .3); }
.sasga-mini.actual { border-color: var(--sasga-marca); }
.sasga-mini img { width: 100%; display: block; aspect-ratio: 3/4; object-fit: cover; background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.14); }
.sasga-mini span { display: block; font-size: .7rem; color: #5c6d78; padding: .2rem 0; }

/* ---------- Carga ---------- */
.sasga-visor-cargando {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  color: #4a5a66;
  font-size: .9rem;
  z-index: 20;
}
.sasga-visor-cargando.oculto { display: none; }
.sasga-giro {
  width: 2.4rem;
  height: 2.4rem;
  border: 2px solid rgba(20, 32, 42, .15);
  border-top-color: var(--sasga-marca);
  border-radius: 50%;
  animation: sasga-girar .8s linear infinite;
}
@keyframes sasga-girar { to { transform: rotate(360deg); } }

/* ---------- Móvil: las flechas pasan al pie, junto al contador ---------- */
@media (max-width: 720px) {
  .sasga-visor-titulo { max-width: 45vw; font-size: .85rem; }
  .sasga-visor-btn { width: 2.25rem; height: 2.25rem; }
  .sasga-visor-escena { padding: .5rem; gap: 0; }
  .sasga-visor-escena .sasga-visor-nav { display: none; }
  .sasga-visor-pie { gap: 1.5rem; }
  .sasga-visor-pie .sasga-visor-nav { display: flex; width: 2.6rem; height: 2.6rem; }
  .sasga-visor-pie .sasga-visor-nav svg { width: 1.5rem; height: 1.5rem; }
  .sasga-visor-miniaturas { grid-template-columns: repeat(auto-fill, minmax(70px, 1fr)); }
}
@media (min-width: 721px) {
  .sasga-visor-pie .sasga-visor-nav { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .sasga-visor-fondo, .sasga-visor-indice, .sasga-mini, .sasga-visor-nav { transition: none; }
  .sasga-giro { animation-duration: 2s; }
}

/* El conmutador de una/dos páginas solo tiene sentido en escritorio */
@media (max-width: 720px) {
  .sasga-solo-escritorio { display: none !important; }
  /* En el pie las flechas son algo menores, pero igual de circulares */
  .sasga-visor-pie .sasga-visor-nav {
    width: 2.7rem !important;
    height: 2.7rem !important;
    min-width: 2.7rem !important;
    min-height: 2.7rem !important;
    max-width: 2.7rem !important;
    max-height: 2.7rem !important;
  }
}

/* ---------- Zoom ----------
   Al ampliar, el libro se genera más grande de verdad (no es un escalado de
   píxeles), así que el marco pasa a tener desplazamiento propio. */
.sasga-visor-marco.con-zoom {
  overflow: auto;
  justify-content: flex-start;
  align-items: flex-start;
  cursor: grab;
  overscroll-behavior: contain;
  scrollbar-width: thin;
}
.sasga-visor-marco.con-zoom:active { cursor: grabbing; }
.sasga-visor-marco.con-zoom > .sasga-visor-libro { margin: auto; }
.sasga-visor-marco.con-zoom::-webkit-scrollbar { width: 10px; height: 10px; }
.sasga-visor-marco.con-zoom::-webkit-scrollbar-thumb {
  background: rgba(27, 43, 75, .3);
  border-radius: 5px;
}
.sasga-visor-marco.con-zoom::-webkit-scrollbar-thumb:hover { background: rgba(27, 43, 75, .5); }

.sasga-visor-zoom {
  font-family: inherit;
  font-size: .8rem;
  font-variant-numeric: tabular-nums;
  color: var(--sasga-marca);
  background: rgba(27, 43, 75, .09);
  padding: .12rem .5rem;
  border-radius: 999px;
  opacity: 0;
  transition: opacity .15s ease;
}
.sasga-visor-zoom.visible { opacity: 1; }