/* ============================================================
   URBANISTA EDITORIAL — hoja de estilos
   Sistema: señalética vial + fanzine + serigrafía
============================================================ */

:root {
  --azul: #006DFE;
  --amarillo: #FFCC00;
  --tinta: #0B0C0E;
  --papel: #F2EEE3;
  --blanco: #FFFFFF;
  --rojo-correccion: #E0342B;

  --f-display: 'Bebas Neue', 'Arial Narrow', sans-serif;
  --f-cuerpo: 'Archivo', 'Helvetica Neue', Arial, sans-serif;
  --f-mono: 'IBM Plex Mono', 'Courier New', monospace;

  --ancho-max: 1180px;
  --borde-grueso: 3px solid var(--tinta);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 96px; }

body {
  background: var(--papel);
  color: var(--tinta);
  font-family: var(--f-cuerpo);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; }

h1, h2, h3 {
  font-family: var(--f-display);
  font-weight: 400;
  line-height: .95;
  letter-spacing: .01em;
  text-transform: uppercase;
}

h2 { font-size: clamp(2.6rem, 5.5vw, 4.2rem); }
h3 { font-size: clamp(1.5rem, 2.6vw, 2rem); }

a { color: var(--azul); }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  clip-path: inset(50%); overflow: hidden; white-space: nowrap;
}

.skip-link {
  position: absolute; top: -60px; left: 12px; z-index: 200;
  background: var(--tinta); color: var(--amarillo);
  font-family: var(--f-mono); padding: .6rem 1rem;
  transition: top .2s;
}
.skip-link:focus { top: 12px; }

:focus-visible {
  outline: 3px solid var(--azul);
  outline-offset: 3px;
}

.txt-amarillo { color: var(--amarillo); }

/* ---------- kickers y cabeceras de sección ---------- */

.kicker {
  font-family: var(--f-mono);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .22em;
  display: flex; align-items: center; gap: .55rem;
  color: var(--azul);
}
.kicker--amarillo { color: var(--amarillo); }
.kicker__d { width: 13px; height: 13px; flex: none; }

.seccion-head {
  max-width: var(--ancho-max);
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
  display: grid; gap: 1rem;
}
.seccion-head__bajada { max-width: 34rem; font-size: 1.05rem; }
.seccion-head--claro { color: var(--papel); }
.seccion-head--claro .seccion-head__bajada { color: color-mix(in srgb, var(--papel) 82%, transparent); }

/* ---------- botones ---------- */

.btn {
  display: inline-block;
  font-family: var(--f-display);
  font-size: 1.25rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  text-decoration: none;
  padding: .7rem 1.6rem .55rem;
  border: var(--borde-grueso);
  cursor: pointer;
  transition: transform .12s ease, box-shadow .12s ease;
  box-shadow: 4px 4px 0 var(--tinta);
  background: var(--blanco);
  color: var(--tinta);
}
.btn:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 var(--tinta); }
.btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--tinta); }

.btn--primario { background: var(--azul); color: var(--blanco); }
.btn--amarillo { background: var(--amarillo); color: var(--tinta); }
.btn--secundario { background: transparent; }
.btn--linea {
  box-shadow: none; border-width: 2px;
  font-size: 1.05rem; padding: .5rem 1.1rem .4rem;
  background: transparent;
}
.btn--linea:hover { background: var(--amarillo); transform: none; box-shadow: none; }

/* ============================================================
   HEADER
============================================================ */

.site-header {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem;
  padding: .65rem 1.5rem;
  background: var(--papel);
  border-bottom: var(--borde-grueso);
}

.brand {
  display: flex; align-items: center; gap: .7rem;
  text-decoration: none; color: var(--tinta);
}
.brand__iso { width: 46px; height: 46px; flex: none; }
.brand__word {
  font-family: var(--f-display);
  font-size: 1.7rem; line-height: .85;
  display: grid;
}
.brand__word small {
  font-size: .72rem; letter-spacing: .48em;
  font-family: var(--f-mono); font-weight: 600;
}

.nav-list {
  display: flex; align-items: center; gap: 1.4rem;
  list-style: none;
}
.nav-list a:not(.btn) {
  font-family: var(--f-mono); font-size: .82rem; font-weight: 500;
  letter-spacing: .04em;
  color: var(--tinta); text-decoration: none;
  padding: .35rem 0;
  border-bottom: 3px solid transparent;
}
.nav-list a:not(.btn):hover { border-bottom-color: var(--amarillo); }

.tag-obras {
  font-size: .6rem; background: var(--amarillo);
  border: 2px solid var(--tinta);
  padding: .08rem .3rem; vertical-align: middle;
  letter-spacing: 0;
}

.btn--nav { font-size: 1rem; padding: .45rem 1rem .35rem; box-shadow: 3px 3px 0 var(--tinta); }

.nav-toggle { display: none; }

/* ============================================================
   HERO
============================================================ */

.hero {
  max-width: var(--ancho-max);
  margin: 0 auto;
  padding: 4rem 1.5rem 4.5rem;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: 3.5rem;
  align-items: center;
}

.hero__copy { display: grid; gap: 1.4rem; justify-items: start; }

.hero__title {
  font-size: clamp(3.4rem, 7.5vw, 6.2rem);
}
.hero__title-hl {
  color: var(--azul);
  position: relative;
  display: inline-block;
}
.hero__title-hl::after {
  content: "";
  position: absolute; left: -2%; right: -4%; bottom: .04em;
  height: .22em;
  background: var(--amarillo);
  z-index: -1;
  transform: skewX(-8deg);
}

.hero__bajada { max-width: 32rem; }

.hero__ctas { display: flex; flex-wrap: wrap; gap: 1rem; }

.hero__ruta-meta {
  font-family: var(--f-mono); font-size: .72rem; font-weight: 600;
  letter-spacing: .18em; opacity: .55;
  border-top: 2px dashed var(--tinta);
  padding-top: .8rem; margin-top: .4rem;
}

/* ---------- galería rotativa ---------- */

.galeria { display: grid; gap: 1rem; justify-items: center; }

.galeria__marco {
  position: relative;
  width: 100%;
  border: var(--borde-grueso);
  box-shadow: 8px 8px 0 var(--tinta);
  background: var(--tinta);
  transform: rotate(1.2deg);
}

.galeria__pila { position: relative; aspect-ratio: 640 / 520; overflow: hidden; }

.galeria__slide {
  position: absolute; inset: 0;
  opacity: 0;
  transition: opacity .8s ease;
  pointer-events: none;
}
.galeria__slide.is-activa { opacity: 1; pointer-events: auto; }

.galeria__art { display: block; width: 100%; height: 100%; }

.galeria__pie {
  position: absolute; left: 0; bottom: 0;
  background: var(--tinta); color: var(--papel);
  font-family: var(--f-mono); font-size: .7rem; font-weight: 600;
  letter-spacing: .18em;
  padding: .4rem .8rem;
  border-top: 2px solid var(--amarillo);
  border-right: 2px solid var(--amarillo);
}

.galeria__flecha {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 44px; height: 44px;
  display: grid; place-items: center;
  background: var(--amarillo);
  border: var(--borde-grueso);
  cursor: pointer;
  color: var(--tinta);
  z-index: 5;
}
.galeria__flecha svg { width: 20px; height: 20px; }
.galeria__flecha:hover { background: var(--blanco); }
.galeria__flecha--prev { left: -18px; }
.galeria__flecha--next { right: -18px; }

.galeria__dots { display: flex; gap: .8rem; }

.galeria__dot {
  width: 15px; height: 15px;
  padding: 0; border: none;
  background: transparent;
  cursor: pointer;
  position: relative;
}
.galeria__dot::before {
  content: "";
  position: absolute; inset: 1px;
  transform: rotate(45deg);
  background: transparent;
  border: 2.5px solid var(--tinta);
  transition: background .2s;
}
.galeria__dot[aria-selected="true"]::before { background: var(--azul); border-color: var(--tinta); }
.galeria__dot:hover::before { background: var(--amarillo); }

/* ---------- divisoria tipo calzada ---------- */

.ruta-divisoria {
  height: 26px;
  background: var(--tinta);
  position: relative;
  overflow: hidden;
}
.ruta-divisoria span {
  position: absolute; top: 50%; left: 0; right: 0;
  height: 4px; transform: translateY(-50%);
  background: repeating-linear-gradient(
    90deg,
    var(--amarillo) 0 42px,
    transparent 42px 74px
  );
}

/* ============================================================
   SERVICIOS — LIBRO POP-UP
============================================================ */

.servicios {
  background: var(--tinta);
  color: var(--papel);
  padding: 5.5rem 0 6rem;
  position: relative;
}
.servicios h2 { color: var(--papel); }

.libro-escena {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 1rem;
  display: grid;
  justify-items: center;
  gap: 1.2rem;
}

.libro {
  width: 100%;
  perspective: 2200px;
  outline-offset: 8px;
}

.libro__cuerpo {
  position: relative;
  transform-style: preserve-3d;
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 460px;
  transform: rotateX(7deg);
}

/* atril / sombra bajo el libro */
.libro__atril {
  position: absolute;
  left: 6%; right: 6%; bottom: -26px;
  height: 30px;
  background: rgba(0, 0, 0, .55);
  filter: blur(14px);
  border-radius: 50%;
}

.libro__pagina {
  background: var(--papel);
  border: var(--borde-grueso);
  position: relative;
  min-height: 460px;
  overflow: hidden;
}
.libro__pagina--izq {
  border-right-width: 1px;
  border-radius: 8px 0 0 8px;
  background:
    linear-gradient(90deg, transparent 0 92%, rgba(11,12,14,.14) 100%),
    repeating-linear-gradient(0deg, transparent 0 30px, rgba(11,12,14,.035) 30px 31px),
    var(--papel);
}
.libro__pagina--der {
  border-left-width: 1px;
  border-radius: 0 8px 8px 0;
  background:
    linear-gradient(270deg, transparent 0 92%, rgba(11,12,14,.14) 100%),
    var(--papel);
}

.libro__lomo {
  position: absolute; top: -6px; bottom: -6px; left: 50%;
  width: 14px; transform: translateX(-50%);
  background: var(--tinta);
  border-radius: 7px;
  z-index: 6;
}

/* página izquierda: contenido */
.pagina-info {
  height: 100%;
  padding: 2.4rem 2.6rem;
  display: grid;
  gap: 1rem;
  align-content: start;
  justify-items: start;
  color: var(--tinta);
}
.pagina-info__codigo {
  font-family: var(--f-mono); font-weight: 600;
  font-size: .95rem; letter-spacing: .3em;
  background: var(--tinta); color: var(--amarillo);
  padding: .35rem .8rem;
}
.pagina-info__titulo { font-size: clamp(1.9rem, 3.4vw, 2.7rem); }
.pagina-info__desc { max-width: 26rem; }

/* transición de contenido al pasar página */
.pagina-info, .popup-escenario { transition: opacity .25s ease; }
.libro.is-cambiando .pagina-info,
.libro.is-cambiando .popup-escenario { opacity: 0; }

/* hoja giratoria decorativa */
.libro__hoja {
  position: absolute;
  top: 0; bottom: 0; left: 50%;
  width: 50%;
  transform-origin: left center;
  transform-style: preserve-3d;
  pointer-events: none;
  z-index: 5;
  display: none;
}
.libro__hoja.is-girando { display: block; }

.libro__hoja-cara {
  position: absolute; inset: 0;
  backface-visibility: hidden;
  border: var(--borde-grueso);
}
.libro__hoja-cara--frente {
  background: linear-gradient(270deg, var(--papel) 0 88%, #dcd6c6 100%);
  border-radius: 0 8px 8px 0;
}
.libro__hoja-cara--dorso {
  background: linear-gradient(90deg, var(--papel) 0 88%, #dcd6c6 100%);
  border-radius: 8px 0 0 8px;
  transform: rotateY(180deg);
}

@keyframes hoja-adelante {
  from { transform: rotateY(0deg); }
  to   { transform: rotateY(-180deg); }
}
@keyframes hoja-atras {
  from { transform: rotateY(-180deg); }
  to   { transform: rotateY(0deg); }
}
.libro__hoja--adelante { animation: hoja-adelante .7s cubic-bezier(.45,.05,.35,1) forwards; }
.libro__hoja--atras    { animation: hoja-atras   .7s cubic-bezier(.45,.05,.35,1) forwards; }

/* ---------- escenario pop-up ---------- */

.popup-escenario {
  height: 100%;
  min-height: 454px;
  display: grid;
  place-items: end center;
  perspective: 900px;
  transform-style: preserve-3d;
  padding: 1.6rem;
}

.popup {
  width: min(88%, 360px);
  aspect-ratio: 360 / 300;
  position: relative;
  transform-style: preserve-3d;
}

.popup svg { display: block; width: 100%; height: 100%; overflow: visible; }

/* capas que se levantan desde el pliegue */
.pop-layer {
  position: absolute;
  inset: 0;
  transform-origin: 50% 100%;
  transform: rotateX(-88deg);
  opacity: 0;
}
.popup.is-armado .pop-layer {
  transform: rotateX(0deg);
  opacity: 1;
  transition:
    transform .65s cubic-bezier(.2, 1.35, .4, 1),
    opacity .3s ease;
}
.popup.is-armado .pop-layer:nth-child(1) { transition-delay: .05s; }
.popup.is-armado .pop-layer:nth-child(2) { transition-delay: .2s; }
.popup.is-armado .pop-layer:nth-child(3) { transition-delay: .35s; }
.popup.is-armado .pop-layer:nth-child(4) { transition-delay: .5s; }
.popup.is-armado .pop-layer:nth-child(5) { transition-delay: .65s; }

/* pliegue central marcado en el escenario */
.libro__pagina--der::after {
  content: "";
  position: absolute; left: 8%; right: 8%; bottom: 3.2rem;
  border-top: 2px dashed rgba(11, 12, 14, .25);
}

/* controles del libro */
.libro__controles {
  display: flex; align-items: center; gap: 1.4rem;
  margin-top: 1.6rem;
}
.libro__btn {
  width: 52px; height: 52px;
  display: grid; place-items: center;
  background: var(--amarillo);
  color: var(--tinta);
  border: var(--borde-grueso);
  box-shadow: 4px 4px 0 rgba(242, 238, 227, .25);
  cursor: pointer;
}
.libro__btn svg { width: 22px; height: 22px; }
.libro__btn:hover:not(:disabled) { background: var(--blanco); }
.libro__btn:disabled { opacity: .35; cursor: not-allowed; }

.libro__folio {
  font-family: var(--f-mono); font-size: .85rem; font-weight: 600;
  letter-spacing: .12em;
  min-width: 9ch; text-align: center;
}

.libro__ayuda {
  font-family: var(--f-mono); font-size: .7rem;
  letter-spacing: .1em; opacity: .5;
}

/* ============================================================
   RUTA COMPLETA (KM)
============================================================ */

.ruta { padding: 5.5rem 0 5rem; }

.ruta__linea {
  max-width: var(--ancho-max);
  margin: 0 auto;
  padding: 1rem 1.5rem 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
  position: relative;
}
/* línea de ruta que conecta las paradas */
.ruta__linea::before {
  content: "";
  position: absolute;
  top: 2.6rem; left: 3rem; right: 3rem;
  border-top: 3px dashed var(--tinta);
  opacity: .35;
}

.ruta__parada {
  position: relative;
  display: grid; gap: .7rem;
  align-content: start;
}
.ruta__km {
  font-family: var(--f-mono); font-weight: 600;
  font-size: .9rem; letter-spacing: .2em;
  background: var(--azul); color: var(--blanco);
  display: inline-block; justify-self: start;
  padding: .55rem 1rem;
  border: var(--borde-grueso);
  box-shadow: 4px 4px 0 var(--tinta);
  position: relative; z-index: 1;
}
.ruta__parada:nth-child(2) .ruta__km { background: var(--amarillo); color: var(--tinta); }
.ruta__parada p:not(.ruta__km) { max-width: 30ch; }

.ruta__cta {
  max-width: var(--ancho-max);
  margin: 3rem auto 0;
  padding: 0 1.5rem;
}

/* ============================================================
   SELLO
============================================================ */

.sello { padding: 4.5rem 0 5rem; }

.sello__grilla {
  max-width: var(--ancho-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.6rem;
}

.sello__carta {
  border: var(--borde-grueso);
  min-height: 220px;
  display: grid;
  align-content: space-between;
  padding: 1.4rem;
  background:
    repeating-linear-gradient(-45deg, transparent 0 14px, rgba(11,12,14,.05) 14px 28px),
    var(--blanco);
}
.sello__carta:nth-child(2) { transform: rotate(.8deg); }
.sello__carta:nth-child(3) { transform: rotate(-.7deg); }

.sello__num {
  font-family: var(--f-mono); font-weight: 600;
  font-size: .85rem; letter-spacing: .25em;
}
.sello__estado {
  font-family: var(--f-display);
  font-size: 2rem;
  color: transparent;
  -webkit-text-stroke: 1.6px var(--tinta);
}

/* ============================================================
   TIENDA
============================================================ */

.tienda {
  background: var(--azul);
  color: var(--blanco);
  overflow: hidden;
}

.tienda__cinta {
  background: var(--amarillo);
  border-top: var(--borde-grueso);
  border-bottom: var(--borde-grueso);
  overflow: hidden;
  white-space: nowrap;
}
.tienda__cinta-texto {
  display: inline-flex;
  animation: cinta 22s linear infinite;
}
.tienda__cinta-texto span {
  font-family: var(--f-mono); font-weight: 600;
  font-size: .85rem; letter-spacing: .25em;
  color: var(--tinta);
  padding: .55rem 0;
}
@keyframes cinta {
  to { transform: translateX(-33.333%); }
}

.tienda__cuerpo {
  max-width: 760px;
  margin: 0 auto;
  padding: 4.5rem 1.5rem 5rem;
  display: grid; gap: 1.4rem;
  text-align: left;
}
.tienda__cuerpo h2 { color: var(--blanco); }
.tienda__cuerpo > p { max-width: 40rem; }

.tienda__aviso {
  display: flex; flex-wrap: wrap; gap: .8rem;
  margin-top: .5rem;
}
.tienda__aviso input {
  flex: 1 1 240px;
  font-family: var(--f-mono);
  font-size: .95rem;
  padding: .8rem 1rem;
  border: var(--borde-grueso);
  background: var(--blanco);
  color: var(--tinta);
}

.nota-demo {
  font-family: var(--f-mono); font-size: .78rem;
  letter-spacing: .04em;
  min-height: 1.2em;
}
.nota-demo:not(:empty)::before { content: "▸ "; }

/* ============================================================
   SOBRE NOSOTROS
============================================================ */

.nosotros { padding: 5.5rem 0 5rem; }

.manifiesto {
  max-width: 850px;
  margin: 0 auto 3.5rem;
  padding: 0 1.5rem;
}
.manifiesto p {
  font-family: var(--f-display);
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  line-height: 1.15;
  border-left: 8px solid var(--amarillo);
  padding-left: 1.6rem;
}

.bios {
  max-width: var(--ancho-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.6rem;
}
.bio {
  border-top: var(--borde-grueso);
  padding-top: 1.2rem;
  display: grid; gap: .5rem;
}
.bio__rol {
  font-family: var(--f-mono); font-weight: 600;
  font-size: .75rem; letter-spacing: .3em;
  color: var(--azul);
}
.bio p:not(.bio__rol) { max-width: 36rem; }

/* ============================================================
   HISTORIAS URBANAS
============================================================ */

.historias {
  background: var(--tinta);
  color: var(--papel);
  padding: 5.5rem 0 6rem;
}
.historias h2 { color: var(--papel); }

.historias__pasos {
  max-width: var(--ancho-max);
  margin: 0 auto 3rem;
  padding: 0 1.5rem;
  list-style: none;
  counter-reset: paso;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.historias__pasos li {
  counter-increment: paso;
  display: grid; gap: .5rem;
  border-top: 3px solid var(--amarillo);
  padding-top: 1rem;
  position: relative;
}
.historias__pasos li::before {
  content: counter(paso, decimal-leading-zero);
  font-family: var(--f-mono); font-weight: 600;
  font-size: .8rem; letter-spacing: .2em;
  color: var(--amarillo);
}
.historias__pasos p { opacity: .82; max-width: 30ch; }

.historias__indice {
  max-width: var(--ancho-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.historias__indice-titulo {
  font-family: var(--f-mono); font-weight: 600;
  font-size: .78rem; letter-spacing: .2em;
  margin-bottom: 1rem; opacity: .9;
}
.historias__indice ul { list-style: none; }
.historias__indice li {
  display: grid;
  grid-template-columns: 8ch 1fr auto auto;
  gap: 1.5rem;
  align-items: baseline;
  padding: .9rem 0;
  border-bottom: 1px dashed rgba(242, 238, 227, .35);
  font-family: var(--f-mono); font-size: .9rem;
}
.hist-num { color: var(--amarillo); font-weight: 600; }
.hist-titulo { font-family: var(--f-cuerpo); font-style: italic; opacity: .85; }
.hist-autor, .hist-anio { opacity: .6; font-size: .8rem; }

.historias__cta {
  max-width: var(--ancho-max);
  margin: 2.6rem auto 0;
  padding: 0 1.5rem;
}

/* ============================================================
   CONTACTO
============================================================ */

.contacto { padding: 5.5rem 0 6rem; }

.contacto__grilla {
  max-width: var(--ancho-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
  gap: 3rem;
  align-items: start;
}

.contacto__form { display: grid; gap: 1.2rem; justify-items: start; }

.campo { display: grid; gap: .4rem; width: 100%; }
.campo label {
  font-family: var(--f-mono); font-weight: 600;
  font-size: .75rem; letter-spacing: .25em;
}
.campo input, .campo select, .campo textarea {
  font-family: var(--f-cuerpo);
  font-size: 1rem;
  padding: .75rem .9rem;
  border: var(--borde-grueso);
  background: var(--blanco);
  color: var(--tinta);
  width: 100%;
}
.campo textarea { resize: vertical; }

.contacto__datos {
  border: var(--borde-grueso);
  background: var(--blanco);
  box-shadow: 8px 8px 0 var(--amarillo);
  padding: 2rem;
  position: relative;
}
.contacto__datos dl { display: grid; gap: 1.4rem; }
.contacto__datos dt {
  font-family: var(--f-mono); font-weight: 600;
  font-size: .72rem; letter-spacing: .3em;
  color: var(--azul);
  margin-bottom: .25rem;
}
.contacto__datos dd { max-width: 30ch; }
.contacto__iso {
  width: 74px; height: 74px;
  margin-top: 1.8rem;
}

/* ============================================================
   FOOTER
============================================================ */

.site-footer {
  background: var(--tinta);
  color: var(--papel);
  text-align: center;
  padding: 0 1.5rem 3rem;
}
.site-footer__linea {
  height: 26px;
  background: repeating-linear-gradient(
    90deg,
    var(--amarillo) 0 42px,
    var(--tinta) 42px 74px
  );
  margin-bottom: 3rem;
}
.site-footer__marca {
  font-family: var(--f-display);
  font-size: clamp(2.4rem, 8vw, 5.5rem);
  line-height: 1;
  letter-spacing: .04em;
}
.site-footer__meta {
  font-family: var(--f-mono); font-size: .78rem;
  letter-spacing: .18em; opacity: .6;
  margin-top: .8rem;
}
.site-footer__firma {
  font-style: italic; opacity: .45;
  margin-top: 1.6rem; font-size: .9rem;
}

/* ============================================================
   RESPONSIVE
============================================================ */

@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; gap: 3rem; }
  .galeria__marco { transform: rotate(0deg); }
  .galeria__flecha--prev { left: 8px; }
  .galeria__flecha--next { right: 8px; }

  .ruta__linea, .historias__pasos, .sello__grilla { grid-template-columns: 1fr; }
  .ruta__linea::before { display: none; }
  .bios { grid-template-columns: 1fr; }
  .contacto__grilla { grid-template-columns: 1fr; }

  /* libro: apilar páginas verticalmente */
  .libro__cuerpo {
    grid-template-columns: 1fr;
    transform: none;
    min-height: 0;
  }
  .libro__pagina { min-height: 0; }
  .libro__pagina--izq {
    border-right-width: 3px; border-bottom-width: 1px;
    border-radius: 8px 8px 0 0;
  }
  .libro__pagina--der {
    border-left-width: 3px; border-top-width: 1px;
    border-radius: 0 0 8px 8px;
  }
  .libro__lomo {
    top: auto; left: -6px; right: -6px; bottom: auto;
    width: auto; height: 12px;
    transform: none;
    /* posicionada vía margen del grid: se oculta para simplificar */
    display: none;
  }
  .libro__hoja { display: none !important; }
  .popup-escenario { min-height: 340px; }
  .pagina-info { padding: 1.8rem 1.5rem; }
}

@media (max-width: 780px) {
  .site-header { flex-wrap: wrap; }
  .nav-toggle {
    display: grid; gap: 5px;
    background: var(--amarillo);
    border: var(--borde-grueso);
    padding: .55rem .6rem;
    cursor: pointer;
    margin-left: auto;
  }
  .nav-toggle__bar { width: 22px; height: 3px; background: var(--tinta); }

  .nav-list {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: .4rem;
    padding: 1rem 0 .6rem;
    border-top: 2px dashed var(--tinta);
    margin-top: .6rem;
  }
  .site-nav { width: 100%; display: flex; flex-wrap: wrap; }
  .nav-list.is-abierta { display: flex; }
  .nav-list a:not(.btn) { font-size: 1rem; padding: .5rem 0; }
  .nav-cta-item { margin-top: .6rem; }

  .hero { padding-top: 2.6rem; }
  .historias__indice li {
    grid-template-columns: 8ch 1fr;
    row-gap: .2rem;
  }
  .hist-autor { grid-column: 2; }
  .hist-anio { grid-column: 2; }
}

/* ============================================================
   REDUCED MOTION
============================================================ */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .galeria__slide { transition: opacity .2s linear; }

  .libro__hoja { display: none !important; }

  .pop-layer,
  .popup.is-armado .pop-layer {
    transform: none;
    transition: opacity .3s ease;
    transition-delay: 0s;
  }

  .tienda__cinta-texto { animation: none; }
  .btn, .btn:hover, .btn:active { transform: none; transition: none; }
}