/* ============================================================
   NICAN MOPOHUA — LIBRO INTERACTIVO
   - Escritorio: libro abierto con lomo al centro (2 mitades)
   - Móvil: una hoja a la vez que se voltea hacia la izquierda
   ============================================================ */

.nican-body {
  background: var(--crema-alt);
}

.nican-page {
  max-width: 1100px;
  margin: 0 auto;
  padding: clamp(2.2rem, 4vw, 3.4rem) 1.25rem 4rem;
}

.nican-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 2.2rem;
}

.nican-head h1 {
  font-family: "Fray Gabriel", "Cormorant Garamond", serif;
  font-weight: 600;
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  color: var(--verde-oscuro);
  line-height: 1.12;
  margin-top: 0.7rem;
}

.nican-head p:not(.eyebrow) {
  margin-top: 1rem;
  color: var(--tinta-sub);
  font-weight: 300;
  line-height: 1.7;
}

/* ---------- El libro ---------- */
.libro-wrap {
  position: relative;
  width: min(980px, 96vw);
  margin: 0 auto;
}

.libro {
  position: relative;
  aspect-ratio: 2 / 1.12;
  perspective: 2400px;
}

.libro-tapiz {
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: 14px 16px 16px 14px;
  background: linear-gradient(150deg, var(--verde), var(--verde-oscuro));
  box-shadow:
    0 34px 64px -30px color-mix(in srgb, var(--verde-oscuro) 60%, transparent),
    inset 0 0 0 1px rgba(255, 255, 255, 0.09);
}

.libro-tapiz::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px solid color-mix(in srgb, var(--oro-suave) 38%, transparent);
  border-radius: 8px 12px 12px 8px;
}

/* Hoja: ocupa la mitad derecha y pivota sobre el lomo (borde izquierdo) */
.hoja {
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  transform-origin: left center;
  transform-style: preserve-3d;
  transition: transform 0.9s cubic-bezier(0.55, 0.06, 0.32, 0.99);
  will-change: transform;
}

/* Libro cerrado al entrar: solo se ve la portada a todo el ancho.
   Al dar «Siguiente» se abre y la portada pasa a la mitad izquierda. */
.libro-cerrado .hoja:first-child {
  width: 100%;
}

.hoja.volteando {
  z-index: 500 !important;
}

.hoja.al-izq {
  transform: rotateY(-180deg);
}

.hoja-front,
.hoja-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  overflow: hidden;
}

.hoja-back {
  transform: rotateY(180deg);
}

/* ---------- El papel ---------- */
.pagina {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  padding: clamp(1.3rem, 3vw, 2.3rem) clamp(1rem, 2.2vw, 1.8rem);
  background: var(--crema);
  background-image: radial-gradient(color-mix(in srgb, var(--oro) 5.5%, transparent) 1px, transparent 1px);
  background-size: 22px 22px;
  box-shadow: inset 14px 0 24px -18px color-mix(in srgb, var(--bronce) 38%, transparent);
  border-radius: 0 6px 6px 0;
}

.hoja-back .pagina {
  box-shadow: inset -14px 0 24px -18px color-mix(in srgb, var(--bronce) 38%, transparent);
  border-radius: 6px 0 0 6px;
  display: grid;
  place-items: center;
}

.pagina-titulo {
  font-family: "Cormorant Garamond", serif;
  font-weight: 600;
  font-size: clamp(1.05rem, 1.6vw, 1.4rem);
  color: var(--verde-oscuro);
  line-height: 1.25;
  margin: 0 0 0.55rem;
}

.pagina-cuerpo {
  flex: 1;
  min-height: 0;
  overflow: hidden;
  padding-right: 0.35rem;
  color: var(--tinta);
  font-family: "Cormorant Garamond", serif;
  font-weight: 500;
  font-size: clamp(0.95rem, 1.1vw, 1.12rem);
  line-height: 1.78;
  text-align: justify;
}

.pagina-cuerpo > p:first-of-type::first-letter {
  font-family: "Fray Gabriel", "Cormorant Garamond", serif;
  font-size: 2.7em;
  line-height: 0.82;
  float: left;
  padding-right: 0.1em;
  color: var(--oro);
}

.pagina-cuerpo::-webkit-scrollbar {
  width: 5px;
}

.pagina-cuerpo::-webkit-scrollbar-thumb {
  background: color-mix(in srgb, var(--oro) 35%, transparent);
  border-radius: 99px;
}

.pagina-pie {
  margin-top: 0.7rem;
  padding-top: 0.55rem;
  border-top: 1px solid color-mix(in srgb, var(--oro) 28%, transparent);
  text-align: center;
  font-size: 0.62rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--bronce);
}

/* Marca de agua del dorso (hoja ya leída) */
.marca-agua {
  font-size: clamp(2rem, 4vw, 3rem);
  color: color-mix(in srgb, var(--oro) 28%, transparent);
  pointer-events: none;
}

/* ---------- Portada ---------- */
.pagina.portada {
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 0.65rem;
  background:
    radial-gradient(ellipse at 50% 0%, color-mix(in srgb, var(--oro-suave) 16%, transparent), transparent 60%),
    linear-gradient(160deg, var(--verde), var(--verde-oscuro));
  border-radius: 0 6px 6px 0;
  box-shadow: inset 14px 0 24px -16px rgba(0, 0, 0, 0.5);
}

.pagina.portada::before {
  content: "";
  position: absolute;
  inset: 9px;
  border: 1px solid color-mix(in srgb, var(--oro-suave) 50%, transparent);
  border-radius: 3px 7px 7px 3px;
  pointer-events: none;
}

.portada-rayos {
  width: clamp(64px, 11vw, 108px);
  height: clamp(64px, 11vw, 108px);
  margin: 0 auto;
  fill: none;
  stroke: var(--oro-claro);
  stroke-width: 2.2;
  stroke-linecap: round;
}

.portada-rayos circle {
  fill: color-mix(in srgb, var(--oro-suave) 16%, transparent);
}

.portada-titulo {
  font-family: "Fray Gabriel", "Cormorant Garamond", serif;
  font-weight: 600;
  font-size: clamp(1.7rem, 3.4vw, 2.7rem);
  color: var(--oro-suave);
  line-height: 1.08;
  margin: 0;
}

.portada-sub {
  font-family: "Cormorant Garamond", serif;
  font-style: italic;
  font-size: clamp(0.85rem, 1.35vw, 1.02rem);
  color: color-mix(in srgb, var(--crema) 86%, transparent);
  line-height: 1.5;
  max-width: 24ch;
  margin: 0 auto;
}

.portada-autor {
  font-size: 0.6rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--oro-suave) 72%, transparent);
  margin: 0.2rem 0 0;
}

.portada-flor {
  color: var(--oro-claro);
  font-size: 1.05rem;
  line-height: 1;
}

/* ---------- Final ---------- */
.pagina.fin {
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 0.8rem;
}

.fin-titulo {
  font-family: "Fray Gabriel", "Cormorant Garamond", serif;
  font-weight: 600;
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  color: var(--verde-oscuro);
  margin: 0;
}

.fin-texto {
  font-family: "Cormorant Garamond", serif;
  font-weight: 500;
  font-size: clamp(0.98rem, 1.3vw, 1.12rem);
  line-height: 1.75;
  color: var(--tinta);
  max-width: 30ch;
  margin: 0 auto;
}

.fin-reiniciar {
  margin-top: 0.4rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.72rem 1.5rem;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--crema);
  background: linear-gradient(120deg, var(--verde), var(--verde-oscuro));
  box-shadow: 0 12px 22px -12px color-mix(in srgb, var(--verde-oscuro) 55%, transparent);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.fin-reiniciar:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 30px -14px color-mix(in srgb, var(--verde-oscuro) 60%, transparent);
}

/* ---------- Controles ---------- */
.libro-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.7rem;
  flex-wrap: wrap;
}

.libro-btn {
  padding: 0.72rem 1.5rem;
  border-radius: 999px;
  border: 1px solid var(--linea);
  background: transparent;
  color: var(--verde-oscuro);
  cursor: pointer;
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-weight: 500;
  transition: transform 0.3s ease, box-shadow 0.3s ease, opacity 0.3s ease;
}

.libro-btn:not(:disabled):hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 22px -14px rgba(34, 31, 24, 0.4);
}

.libro-btn:disabled {
  opacity: 0.38;
  cursor: default;
}

.libro-btn-primario {
  border-color: transparent;
  color: var(--crema);
  background: linear-gradient(120deg, var(--verde), var(--verde-oscuro));
  box-shadow: 0 12px 22px -12px color-mix(in srgb, var(--verde-oscuro) 55%, transparent);
}

.libro-pagina {
  font-family: "Cormorant Garamond", serif;
  font-size: 1rem;
  color: var(--tinta-sub);
  min-width: 10ch;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

/* Botón de sonido del papel */
.libro-btn-sonido {
  width: 2.7rem;
  padding: 0.66rem 0;
  text-align: center;
  font-size: 1.05rem;
  line-height: 1;
  letter-spacing: 0;
  flex: none;
}

.libro-btn-sonido[aria-pressed="false"] {
  opacity: 0.55;
  filter: grayscale(1);
}

/* Aviso de girar el teléfono (solo móvil vertical) */
.libro-girar {
  position: fixed;
  z-index: 1200;
  left: 50%;
  bottom: 1.4rem;
  transform: translate(-50%, 160%);
  display: flex;
  align-items: center;
  gap: 0.8rem;
  max-width: min(92vw, 420px);
  padding: 0.85rem 1.1rem;
  border-radius: 14px;
  background: color-mix(in srgb, var(--verde-oscuro) 95%, transparent);
  color: var(--crema);
  box-shadow: 0 18px 40px -14px rgba(0, 0, 0, 0.5);
  border: 1px solid color-mix(in srgb, var(--oro-suave) 35%, transparent);
  transition: transform 0.5s cubic-bezier(0.34, 1.2, 0.44, 1), opacity 0.4s ease;
  opacity: 0;
  pointer-events: none;
}

.libro-girar.visible {
  transform: translate(-50%, 0);
  opacity: 1;
  pointer-events: auto;
}

.libro-girar-ico {
  font-size: 1.5rem;
  animation: libro-girar-mecer 1.6s ease-in-out infinite;
  flex: none;
}

@keyframes libro-girar-mecer {
  0%, 100% { transform: rotate(0deg); }
  50% { transform: rotate(-28deg); }
}

.libro-girar-txt {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  line-height: 1.35;
}

.libro-girar-txt strong {
  font-size: 0.92rem;
  letter-spacing: 0.04em;
}

.libro-girar-txt span {
  font-size: 0.78rem;
  opacity: 0.82;
}

.libro-girar-cerrar {
  flex: none;
  width: 1.8rem;
  height: 1.8rem;
  border: none;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  color: var(--crema);
  cursor: pointer;
  font-size: 0.8rem;
  line-height: 1;
  transition: background 0.3s ease;
}

.libro-girar-cerrar:hover {
  background: rgba(255, 255, 255, 0.24);
}

@media (min-width: 768px) {
  .libro-girar {
    display: none; /* nunca en escritorio/tablet */
  }
}

.libro-hint {
  text-align: center;
  margin-top: 0.9rem;
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--tinta-sub);
}

.libro-vacio {
  background: var(--crema);
  border: 1px dashed var(--linea);
  border-radius: 14px;
  padding: 3rem 1.5rem;
  text-align: center;
  color: var(--tinta-sub);
}

/* Reinicio instantáneo sin animación */
.libro.sin-animacion .hoja {
  transition: none;
}

/* ---------- Móvil: una hoja a la vez ---------- */
@media (max-width: 767px) {
  .libro {
    aspect-ratio: 3 / 4.15;
    overflow: hidden;
    border-radius: 10px;
  }

  .libro-tapiz {
    display: none;
  }

  .hoja {
    width: 100%;
    right: auto;
    left: 0;
  }

  .pagina {
    padding: clamp(1.4rem, 5vw, 2.2rem) clamp(1.15rem, 4.5vw, 1.6rem);
  }

  .pagina-cuerpo {
    font-size: clamp(1rem, 4.4vw, 1.15rem);
  }

  .libro-controls {
    gap: 0.7rem;
  }

  .libro-btn {
    padding: 0.66rem 1.1rem;
    font-size: 0.7rem;
  }
}