/* ═══════════════════════════════════════════════════════════════════════════
   Maloca Digital v2.0 — Recorrido inmersivo (derivado de KANSA v6.0)
   Paralaje multicapa estilo Firewatch (la selva y la maloca de la portada): el
   CONTENEDOR QUE HACE SCROLL (#k6-viewport) tiene perspective; las capas de la
   capas de la selva viven en Z negativa con escala compensada. Para que el 3D no se
   aplane, toda la cadena viewport → main → escena → lámina → portada →
   capas lleva transform-style: preserve-3d y NINGÚN overflow distinto de
   visible (overflow:hidden aplana). Las láminas siguientes, opacas y en Z=0,
   tapan las capas lejanas al pasar. Scroll nativo: no se secuestra.
   ═══════════════════════════════════════════════════════════════════════════ */
html, body { height: 100%; overflow: hidden; background: var(--azul-noche); }
body.modo-inmersivo { color: #E6EDF7; }

.saltar { position: fixed; left: 1rem; top: -4rem; z-index: 100; background: var(--verde-comunidad); color: var(--azul-noche); padding: .6rem 1rem; border-radius: .5rem; font-weight: 700; }
.saltar:focus { top: 1rem; }

.viewport {
  position: fixed; inset: 0; overflow-y: auto; overflow-x: hidden;
  background: radial-gradient(120% 70% at 80% 0%, var(--azul-maloca) 0%, var(--azul-noche) 55%) fixed;
  perspective: 1px; perspective-origin: 50% 0;
  -webkit-overflow-scrolling: touch;
}
.viewport > main, .escena, .lamina.plantilla-portada { transform-style: preserve-3d; }
main:focus { outline: none; }

/* ── Cabecera, progreso y carril ────────────────────────────────────────── */
.cab {
  position: fixed; top: 0; left: 0; right: 0; z-index: 40; height: 58px;
  display: flex; align-items: center; gap: 1rem; padding: 0 clamp(.9rem, 2.4vw, 2rem);
  background: rgba(2, 31, 59, .78); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(113, 206, 130, .18);
}
.cab-marca { display: flex; align-items: center; gap: .6rem; text-decoration: none; color: #fff; }
.cab-iso { width: 30px; height: 28px; display: block; }
.cab-txt { font-family: var(--f-logo); font-weight: 800; letter-spacing: -.01em; font-size: 1rem; line-height: 1; }
.cab-txt i { font-style: normal; font-weight: 500; color: var(--azul-suave); }
.cab-txt small { display: block; font-family: var(--f-mono); font-weight: 400; font-size: .62rem; letter-spacing: .1em; color: var(--verde-palido); margin-top: .25rem; }
.cab-escena { margin: 0 auto; font-family: var(--f-mono); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; color: #9FB3CC; }
.cab-acciones { display: flex; gap: .45rem; }
.btn-cab {
  appearance: none; border: 1px solid rgba(113, 206, 130, .4); background: rgba(255, 255, 255, .04); color: #F3F6FB;
  border-radius: 999px; padding: .42rem .85rem; font-family: var(--f-sans); font-size: .82rem; font-weight: 600; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; gap: .4rem;
}
.btn-cab:hover, .btn-cab[aria-pressed="true"] { background: var(--verde-comunidad); color: var(--azul-noche); border-color: var(--verde-comunidad); }
.btn-cab:focus-visible, .rail a:focus-visible { outline: 2px solid var(--verde-comunidad); outline-offset: 2px; }
.btn-cab kbd { font-size: .68rem; }
.progreso { position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; background: transparent; }
.progreso span { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--azul-digital), var(--verde-comunidad)); }

.rail { position: fixed; left: .9rem; top: 50%; transform: translateY(-50%); z-index: 30; }
.rail ol { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: .3rem; }
.rail a { display: flex; align-items: center; gap: .55rem; text-decoration: none; color: #9FB3CC; padding: .15rem .3rem; border-radius: .4rem; }
.rail-num { font-family: var(--f-mono); font-size: .66rem; width: 1.6rem; height: 1.6rem; display: grid; place-items: center; border: 1px solid rgba(159, 179, 204, .35); border-radius: 50%; background: rgba(2, 31, 59, .75); }
.rail-tit { font-size: .74rem; opacity: 0; transform: translateX(-.3rem); transition: opacity .2s, transform .2s; white-space: nowrap; background: rgba(2, 31, 59, .9); padding: .15rem .45rem; border-radius: .3rem; }
.rail a:hover .rail-tit, .rail a:focus-visible .rail-tit { opacity: 1; transform: none; }
.rail a[aria-current="true"] .rail-num { background: var(--verde-comunidad); color: var(--azul-noche); border-color: var(--verde-comunidad); }

/* ── Láminas ────────────────────────────────────────────────────────────── */
.escena { position: relative; padding-bottom: 7vh; }
.lamina { position: relative; }
.lamina.plantilla-portada { height: 100vh; min-height: 560px; font-size: clamp(12px, 1vw, 15px); background: transparent; }
.lamina.plantilla-portada .portada-texto { padding-top: calc(58px + 3.5vh); }
.lamina.plantilla-portadilla { min-height: 100vh; padding: 96px clamp(1.2rem, 6vw, 6rem) 7vh; font-size: clamp(14px, 1.15vw, 18px); display: flex; align-items: center; }
.lamina.plantilla-portadilla > .porta { width: 100%; max-width: 1280px; margin: 0 auto; }
.lamina.plantilla-libre {
  width: min(1180px, calc(100% - 2 * clamp(1rem, 6vw, 5.5rem))); margin: 0 auto 6vh;
  padding: clamp(1.4rem, 3.2vw, 3rem); border-radius: 22px; color: var(--gris-carbon);
  font-size: clamp(14.5px, 1.02vw, 17px); box-shadow: 0 2.4rem 5rem rgba(0, 0, 0, .45);
}
.escena > .lamina.plantilla-libre:first-child { margin-top: 96px; }
.lamina.sup-claro { background: var(--gris-lirio); }


/* Portada: el selva en capas */
.portada { overflow: visible; transform-style: preserve-3d; }
.portada-fondo, .selva-capas { transform-style: preserve-3d; }
.selva-capas { position: absolute; inset: 0; }
.capa { position: absolute; inset: 0; transform-origin: 50% 0; will-change: transform; }
.capa > svg { width: 100%; height: 100%; }
.capa[data-z="5"] { transform: translateZ(-5px) scale(6); }
.capa[data-z="4"] { transform: translateZ(-4px) scale(5); }
.capa[data-z="3"] { transform: translateZ(-3px) scale(4); }
.capa[data-z="2"] { transform: translateZ(-2px) scale(3); }
.capa[data-z="1"] { transform: translateZ(-1px) scale(2); }
.capa[data-z="0"] { transform: translateZ(-6px) scale(7); }
.portada-texto { transform: translateZ(0); }
@keyframes latido { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-.35em); } }
.portada-sigue { position: absolute; left: 50%; bottom: 4vh; transform: translateX(-50%); z-index: 3; font-family: var(--f-mono); font-size: .72rem; letter-spacing: .3em; text-transform: uppercase; color: var(--verde-comunidad); }

/* Revelados: solo si el JS activó la animación (sin JS todo es visible) */
html.anim [data-revelar] { opacity: 0; transform: translateY(18px); }

/* ── Interactivos ───────────────────────────────────────────────────────── */
html[data-trama="animado"] .trama-gl { display: block; }
.swatch:hover .sw-color { filter: brightness(1.06); }
.crono-scroll { overflow-x: auto; padding-bottom: .4em; scroll-snap-type: x mandatory; }
.crono-scroll .crono { min-width: 1100px; font-size: .95em; }
.crono-scroll .cr-hito { scroll-snap-align: start; transition: transform .25s, box-shadow .25s; }
.crono-scroll .cr-hito:hover { transform: translateY(-3px); box-shadow: var(--sombra-3d); }
.captura { transition: transform .3s cubic-bezier(.2,.7,.2,1), box-shadow .3s; }
.captura:hover { transform: translateY(-3px); box-shadow: 0 1.2em 2.4em rgba(3, 62, 117, .18); }
.tarjeta.card-viva { transition: transform .25s, box-shadow .25s; }
.tarjeta.card-viva:hover { transform: translateY(-3px); box-shadow: 0 1em 2.2em rgba(3, 62, 117, .16); }

/* ── Índice modal y aviso ───────────────────────────────────────────────── */
.indice-modal { position: fixed; inset: 0; z-index: 60; background: rgba(2, 31, 59, .8); backdrop-filter: blur(6px); display: grid; place-items: center; padding: 1rem; }
.indice-modal[hidden] { display: none; }
.indice-caja { width: min(760px, 100%); max-height: 86vh; overflow: auto; background: var(--azul-noche); border: 1px solid rgba(113, 206, 130, .3); border-radius: 18px; padding: 1.4rem 1.6rem; }
.indice-cab { display: flex; justify-content: space-between; align-items: center; margin-bottom: .8rem; }
.indice-cab h2 { color: #fff; margin: 0; }
.indice-lista { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: .3rem 1rem; }
.indice-lista a { display: flex; gap: .7rem; padding: .55rem .6rem; border-radius: .5rem; text-decoration: none; color: #E6EDF7; }
.indice-lista a:hover, .indice-lista a:focus-visible { background: rgba(113, 206, 130, .14); outline: none; }
.indice-lista .rail-num { flex: none; }
.indice-lista .rail-tit { opacity: 1; transform: none; background: none; padding: 0; font-size: .95rem; }
.indice-ayuda { margin: 1rem 0 0; font-size: .82rem; color: #9FB3CC; }
.toast { position: fixed; bottom: 1.4rem; left: 50%; transform: translateX(-50%); z-index: 70; background: var(--verde-comunidad); color: var(--azul-noche); font-weight: 700; padding: .6rem 1.1rem; border-radius: 999px; font-size: .9rem; }
.toast[hidden] { display: none; }
.pie-inmersivo { text-align: center; padding: 2rem 1rem 3rem; font-family: var(--f-mono); font-size: .72rem; letter-spacing: .1em; color: #6F86A3; }

/* ── Adaptación ─────────────────────────────────────────────────────────── */
@media (max-width: 1100px) { .rail { display: none; } }
@media (max-width: 820px) {
  .recorrido, .evolucion { grid-template-columns: 1fr; }
  .evo-flecha { transform: rotate(90deg); justify-self: center; }
  .cab { height: 54px; gap: .5rem; }
  .cab-escena, .cab-txt small, .btn-cab kbd { display: none; }
  .btn-cab { padding: .38rem .65rem; font-size: .78rem; }
  .cols, .porta, .anatomia, .lockups, .tarjeta-pres, .carnes { grid-template-columns: 1fr !important; }
  .grid.g3, .grid.g4, .grid.g5, .variantes, .incorrectos, .semaforo, .madurez, .fondos, .areas, .galeria { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .porta-num { font-size: 4.6em; }
  .porta-tit { font-size: 2.1em; }
  .indice-lista { grid-template-columns: 1fr; }
  .indice, .biblio { columns: 1; }
  .tabla { display: block; overflow-x: auto; }
}
@media (max-width: 520px) {
  .grid.g2, .grid.g3, .grid.g4, .grid.g5, .variantes, .incorrectos, .semaforo, .madurez, .fondos, .areas, .galeria, .paleta.grande { grid-template-columns: 1fr; }
  .cab-txt { font-size: .9rem; }
  .lamina.plantilla-libre { border-radius: 16px; }
  .termino { grid-template-columns: 1fr; }
  .ter-letra { border-right: 0; text-align: left; }
  .portada-tit { font-size: 3.8em; }
  .portada-lema { letter-spacing: .25em; font-size: .8em; }
}

/* ── Movimiento reducido: sin paralaje, sin animaciones ─────────────────── */
@media (prefers-reduced-motion: reduce) {
  .viewport { perspective: none; }
  .capa[data-z] { transform: none !important; }
  html.anim [data-revelar] { opacity: 1; transform: none; }
  * { scroll-behavior: auto !important; }
}