/* ==========================================================================
   Skala 360 · Visor de documentos (flipbook) — tema claro
   ========================================================================== */

body.visor {
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(120% 90% at 50% 0%, #FFFDF9 0%, var(--crema-2) 42%, #EBE1D4 100%);
  color: var(--tinta);
}

/* --- Barra superior ------------------------------------------------------- */
.v-barra {
  flex: none;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: rgba(255,255,255,.90);
  backdrop-filter: saturate(140%) blur(16px);
  border-bottom: 1px solid var(--crema-3);
  z-index: 30;
}
.v-titulo { min-width: 0; margin-right: auto; padding-left: 4px; }
.v-titulo h1 {
  font-family: var(--marca);
  font-size: .98rem;
  font-weight: 600;
  letter-spacing: -.02em;
  color: var(--marron);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.v-titulo p {
  font-size: .74rem;
  color: var(--gris);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.v-grupo { display: flex; align-items: center; gap: 4px; }
.v-sep { width: 1px; height: 26px; background: var(--crema-3); margin: 0 6px; }

.v-icono {
  position: relative;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  color: var(--marron-medio);
  transition: background var(--transicion), color var(--transicion);
}
.v-icono svg { width: 19px; height: 19px; }
.v-icono:hover { background: var(--crema-2); color: var(--marron); }
.v-icono[aria-pressed='true'] { background: rgba(192,126,56,.16); color: var(--bronce); }
.v-icono:disabled { opacity: .3; cursor: default; }
.v-icono:disabled:hover { background: none; color: var(--marron-medio); }

/* Tooltip propio */
.v-icono::after {
  content: attr(data-info);
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  padding: 5px 9px;
  border-radius: 7px;
  background: var(--tinta);
  color: var(--crema);
  font-size: .72rem;
  font-weight: 500;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms, transform 160ms;
  z-index: 60;
}
.v-icono:hover::after { opacity: 1; transform: translateX(-50%) translateY(0); }
@media (max-width: 900px) { .v-icono::after { display: none; } }

.v-volver {
  display: inline-flex;
  align-items: center;
  gap: .5em;
  padding: 8px 14px 8px 10px;
  border-radius: 999px;
  font-size: .85rem;
  font-weight: 500;
  color: var(--marron);
  border: 1px solid var(--crema-3);
  transition: background var(--transicion), border-color var(--transicion);
}
.v-volver:hover { background: var(--crema-2); border-color: var(--bronce); }
.v-volver svg { width: 16px; height: 16px; }

/* --- Cuerpo --------------------------------------------------------------- */
.v-cuerpo { flex: 1; display: flex; min-height: 0; position: relative; }
.v-lienzo { flex: 1; position: relative; min-width: 0; }

/* --- Panel lateral -------------------------------------------------------- */
.v-panel {
  flex: none;
  width: 320px;
  background: rgba(255,255,255,.96);
  border-right: 1px solid var(--crema-3);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: margin-left 320ms cubic-bezier(.22,.61,.36,1), opacity 220ms;
}
.v-panel[hidden] { display: flex; margin-left: -320px; opacity: 0; pointer-events: none; }
.v-panel-cab {
  flex: none;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 10px 12px 16px;
  border-bottom: 1px solid var(--crema-3);
}
.v-panel-cab h2 {
  font-family: var(--sans);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--bronce);
  margin-right: auto;
}
.v-panel-cuerpo { flex: 1; overflow-y: auto; overscroll-behavior: contain; padding: 12px; }
.v-panel-cuerpo::-webkit-scrollbar { width: 9px; }
.v-panel-cuerpo::-webkit-scrollbar-thumb { background: var(--crema-3); border-radius: 9px; }

/* Miniaturas */
.v-miniaturas { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
[data-ratio='ancho'] .v-miniaturas { grid-template-columns: 1fr; }
.v-mini {
  position: relative;
  display: block;
  width: 100%;
  border-radius: 8px;
  overflow: hidden;
  background: var(--crema-2);
  border: 2px solid transparent;
  box-shadow: 0 1px 4px rgba(104,60,22,.10);
  transition: border-color var(--transicion), transform var(--transicion);
}
.v-mini img { width: 100%; height: auto; display: block; }
.v-mini span {
  position: absolute;
  right: 5px;
  bottom: 5px;
  padding: 1px 6px;
  border-radius: 5px;
  background: rgba(255,255,255,.86);
  font-size: .68rem;
  font-weight: 600;
  color: var(--marron);
}
.v-mini:hover { transform: translateY(-2px); border-color: var(--bronce-suave); }
.v-mini.activa { border-color: var(--bronce); }

/* Índice */
.v-indice li + li { margin-top: 2px; }
.v-indice button {
  display: flex;
  align-items: baseline;
  gap: 10px;
  width: 100%;
  padding: 9px 12px;
  border-radius: 8px;
  text-align: left;
  font-size: .88rem;
  color: var(--texto);
  transition: background var(--transicion), color var(--transicion);
}
.v-indice button:hover { background: var(--crema-2); }
.v-indice button.activa { background: rgba(192,126,56,.14); color: var(--marron); font-weight: 500; }
.v-indice .num { flex: none; font-size: .74rem; font-weight: 600; color: var(--gris-claro); font-variant-numeric: tabular-nums; }

/* Búsqueda */
.v-buscador {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  padding: 9px 12px;
  border-radius: 10px;
  background: var(--crema-2);
  border: 1px solid var(--crema-3);
}
.v-buscador svg { width: 16px; height: 16px; color: var(--gris); flex: none; }
.v-buscador input { flex: 1; min-width: 0; background: none; border: 0; outline: none; font-size: .9rem; color: var(--tinta); }
.v-buscador input::placeholder { color: var(--gris-claro); }
.v-resultados li + li { margin-top: 6px; }
.v-resultados button {
  display: block;
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  text-align: left;
  background: var(--crema);
  border: 1px solid var(--crema-3);
  transition: background var(--transicion), border-color var(--transicion);
}
.v-resultados button:hover { background: #fff; border-color: var(--bronce-suave); }
.v-resultados .pag { font-size: .7rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--bronce); }
.v-resultados .frag { font-size: .82rem; line-height: 1.5; color: var(--texto); margin-top: 3px; }
.v-resultados mark { background: rgba(192,126,56,.28); color: var(--marron); border-radius: 3px; padding: 0 2px; }
.v-vacio { padding: 24px 8px; text-align: center; font-size: .85rem; color: var(--gris); }

/* --- Barra inferior ------------------------------------------------------- */
.v-pie {
  flex: none;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px clamp(12px, 3vw, 26px);
  background: rgba(255,255,255,.90);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--crema-3);
  z-index: 30;
}
.v-contador {
  flex: none;
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .82rem;
  font-variant-numeric: tabular-nums;
  color: var(--gris);
}
.v-contador input {
  width: 52px;
  padding: 5px 8px;
  border-radius: 7px;
  text-align: center;
  background: var(--crema-2);
  border: 1px solid var(--crema-3);
  outline: none;
  font-weight: 600;
  color: var(--marron);
}
.v-contador input:focus { border-color: var(--bronce); background: #fff; }
.v-contador .total { color: var(--gris); }
.v-contador .total b { color: var(--tinta); }

.v-rango { flex: 1; min-width: 0; display: flex; align-items: center; }
.v-rango input {
  width: 100%;
  height: 4px;
  -webkit-appearance: none;
  appearance: none;
  background: var(--crema-3);
  border-radius: 4px;
  outline: none;
  cursor: pointer;
}
.v-rango input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 15px; height: 15px;
  border-radius: 50%;
  background: var(--bronce);
  border: 2px solid #fff;
  box-shadow: 0 1px 4px rgba(104,60,22,.35);
  cursor: grab;
}
.v-rango input::-moz-range-thumb {
  width: 13px; height: 13px; border-radius: 50%;
  background: var(--bronce); border: 2px solid #fff; cursor: grab;
}
.v-atajos { flex: none; font-size: .74rem; color: var(--gris); }
.v-atajos kbd {
  display: inline-block;
  padding: 1px 6px;
  margin: 0 1px;
  border-radius: 5px;
  background: var(--crema-2);
  border: 1px solid var(--crema-3);
  font-family: var(--sans);
  font-size: .7rem;
  color: var(--marron-medio);
}
@media (max-width: 860px) { .v-atajos { display: none; } }

/* ==========================================================================
   Motor de flipbook
   ========================================================================== */
.fb {
  --fb-dur: 860ms;
  --fb-curva: cubic-bezier(.42, .02, .18, 1);
  position: relative;
  width: 100%;
  height: 100%;
}
.fb-escenario {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  touch-action: none;
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
}
.fb.con-zoom .fb-escenario { cursor: move; }
.fb-escenario:active { cursor: grabbing; }
.fb-transformador { will-change: transform; }

.fb-libro {
  position: relative;
  perspective: 2400px;
  transform-style: preserve-3d;
  transition: transform var(--fb-dur) var(--fb-curva);
}
.fb-libro.sin-transicion, .fb-hoja.sin-transicion { transition: none !important; }

/* Sombra proyectada bajo el libro */
.fb-libro::before {
  content: '';
  position: absolute;
  left: 1%;
  right: 1%;
  bottom: -20px;
  height: 40px;
  background: radial-gradient(50% 50% at 50% 45%, rgba(104,60,22,.34), rgba(104,60,22,0) 74%);
  filter: blur(4px);
  z-index: 0;
}

.fb-hoja {
  position: absolute;
  top: 0;
  width: var(--pw);
  height: var(--ph);
  transform-origin: left center;
  transform-style: preserve-3d;
  transition: transform var(--fb-dur) var(--fb-curva);
  will-change: transform;
}
.fb[data-modo='doble'] .fb-hoja { left: var(--pw); }
.fb[data-modo='simple'] .fb-hoja { left: 0; }

/* En página simple la hoja gira hacia fuera del encuadre: la ocultamos al
   terminar el giro para que no quede un papel en blanco junto a la página. */
.fb[data-modo='simple'] .fb-hoja {
  transition: transform var(--fb-dur) var(--fb-curva), opacity 1ms linear;
}
.fb[data-modo='simple'] .fb-hoja.volteada {
  opacity: 0;
  transition: transform var(--fb-dur) var(--fb-curva), opacity 1ms linear calc(var(--fb-dur) - 20ms);
}
.fb[data-modo='simple'] .fb-hoja.moviendo { opacity: 1; }

.fb-cara {
  position: absolute;
  inset: 0;
  overflow: hidden;
  background: #fff;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}
.fb-dorso { transform: rotateY(180deg); }
.fb-cara img { width: 100%; height: 100%; object-fit: contain; pointer-events: none; -webkit-user-drag: none; }
.fb-blanco { width: 100%; height: 100%; background: linear-gradient(135deg, #FDFBF7, #F1E9DE); }

/* Solo las hojas visibles proyectan sombra: si la proyectaran todas,
   la pila acumularía un halo oscuro alrededor del libro. */
.fb-hoja.superior > .fb-cara, .fb-hoja.moviendo > .fb-cara, .fb-hoja.animando > .fb-cara {
  box-shadow: 0 14px 40px rgba(104,60,22,.30);
}

/* Esquinas exteriores redondeadas, como una revista real */
.fb[data-modo='doble'] .fb-frente { border-radius: 0 5px 5px 0; }
.fb[data-modo='doble'] .fb-dorso  { border-radius: 0 5px 5px 0; }
.fb[data-modo='simple'] .fb-cara  { border-radius: 4px; }

/* Sombra del lomo sobre el papel */
.fb-cara::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(to right,
    rgba(104,60,22,.26) 0%, rgba(104,60,22,.10) 2.5%,
    rgba(104,60,22,.03) 7%, rgba(104,60,22,0) 13%);
}
.fb[data-modo='simple'] .fb-cara::after { opacity: .4; }

/* Luz y sombra que recorren la hoja mientras gira */
.fb-cara::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  opacity: 0;
  background: linear-gradient(100deg,
    rgba(255,255,255,.55) 0%, rgba(255,255,255,.12) 26%,
    rgba(104,60,22,.05) 62%, rgba(58,34,12,.34) 100%);
}
/* arrastre manual: la intensidad la marca el avance del dedo */
.fb-hoja.moviendo .fb-cara::before { opacity: calc(var(--curva, 0) * .95); }
/* volteo automático: curva de intensidad sincronizada con el giro */
.fb-hoja.animando .fb-cara::before {
  animation: fb-brillo var(--fb-dur) var(--fb-curva) both;
}
@keyframes fb-brillo {
  0%   { opacity: 0; }
  46%  { opacity: .95; }
  100% { opacity: 0; }
}

/* Sombra que la hoja en movimiento arroja sobre la página de abajo */
.fb-sombra-volteo {
  position: absolute;
  top: 0;
  width: var(--pw);
  height: var(--ph);
  pointer-events: none;
  opacity: 0;
  z-index: 800;
}
.fb[data-modo='doble'] .fb-sombra-volteo.izq { left: 0; background: linear-gradient(to left, rgba(58,34,12,.30), rgba(58,34,12,0) 62%); }
.fb[data-modo='doble'] .fb-sombra-volteo.der { left: var(--pw); background: linear-gradient(to right, rgba(58,34,12,.30), rgba(58,34,12,0) 62%); }
.fb.volteando-adelante .fb-sombra-volteo.izq,
.fb.volteando-atras   .fb-sombra-volteo.der { animation: fb-sombra var(--fb-dur) var(--fb-curva) both; }
@keyframes fb-sombra {
  0%   { opacity: 0; }
  40%  { opacity: 1; }
  100% { opacity: 0; }
}

/* Canto del papel: sugiere el grosor de la revista */
.fb-canto {
  position: absolute;
  top: 2%;
  height: 96%;
  width: 7px;
  pointer-events: none;
  z-index: 0;
  border-radius: 3px;
  background: repeating-linear-gradient(to right,
    rgba(104,60,22,.16) 0 1px, rgba(255,255,255,.85) 1px 2.5px);
  box-shadow: 0 6px 16px rgba(104,60,22,.18);
}
.fb-canto.izq { left: -6px; }
.fb-canto.der { right: -6px; }
.fb-canto { opacity: 0; transition: opacity 320ms var(--fb-curva); }
.fb.abierto .fb-canto { opacity: 1; }
.fb[data-modo='simple'] .fb-canto { display: none; }

/* Flechas laterales */
.fb-flecha {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: rgba(255,255,255,.86);
  border: 1px solid var(--crema-3);
  color: var(--marron);
  backdrop-filter: blur(8px);
  box-shadow: var(--sombra-sm);
  opacity: 0;
  transition: opacity var(--transicion), background var(--transicion), transform var(--transicion);
  z-index: 20;
}
.fb-flecha svg { width: 22px; height: 22px; }
.fb-flecha--prev { left: 14px; }
.fb-flecha--next { right: 14px; }
.fb:hover .fb-flecha, .fb-flecha:focus-visible { opacity: 1; }
.fb-flecha:hover { background: var(--marron); border-color: var(--marron); color: #fff; }
@media (hover: none) { .fb-flecha { opacity: .9; } }

/* --- Ayuda al abrir ------------------------------------------------------- */
.v-pista {
  position: absolute;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: 999px;
  background: rgba(255,255,255,.92);
  border: 1px solid var(--crema-3);
  box-shadow: var(--sombra-sm);
  backdrop-filter: blur(10px);
  font-size: .8rem;
  color: var(--texto);
  z-index: 25;
  animation: pista 6s ease forwards;
  pointer-events: none;
}
.v-pista svg { width: 16px; height: 16px; color: var(--bronce); }
@keyframes pista {
  0% { opacity: 0; transform: translate(-50%, 10px); }
  12%, 72% { opacity: 1; transform: translate(-50%, 0); }
  100% { opacity: 0; transform: translate(-50%, 6px); visibility: hidden; }
}

/* --- Móvil ---------------------------------------------------------------- */
@media (max-width: 760px) {
  .v-panel {
    position: absolute;
    inset: 0 auto 0 0;
    z-index: 40;
    width: min(86vw, 330px);
    box-shadow: 0 0 60px rgba(104,60,22,.28);
  }
  .v-panel[hidden] { margin-left: -100%; }
  .v-titulo p { display: none; }
  .v-barra { padding: 8px 10px; gap: 4px; }
  .v-volver span { display: none; }
  .v-volver { padding: 8px 10px; }
  .v-atajos, .v-sep { display: none; }
  .v-oculto-movil { display: none; }
}