/* ══════════════════════════════════════════════════════════════
   EL LIBRO QUE TE LEE · Hoja de estilo del Umbral
   Dos tintas, como los dos mundos. Nada aquí es decorativo.
   ══════════════════════════════════════════════════════════════ */

:root{
  --pergamino:#f7efdc;
  --pergamino-hondo:#efe3c6;
  --noche:#0d1020;
  --noche-2:#141931;
  --noche-3:#1d2340;
  --sepia:#3d3020;
  --granate:#7c1f2d;
  --granate-claro:#a34250;
  --esmeralda:#175a49;
  --esmeralda-clara:#2e7a66;
  --oro:#a8801f;
  --oro-vivo:#c9a227;
  --oro-palido:#e4cf8f;
  --rojo-puerta:#b3372f;
  --naranja:#c96f1f;
  --amarillo:#c9a227;
  --verde:#3f8f4f;
  --azul:#2f6fa8;
  --indigo:#3b3f8f;
  --violeta:#7a3f8f;
  --tinta-clara:#d8cba8;
  --tinta-tenue:rgba(216,203,168,.62);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}

body{
  background:var(--noche);
  color:var(--tinta-clara);
  font-family:'EB Garamond', Georgia, 'Times New Roman', serif;
  font-size:19px;
  line-height:1.8;
  min-height:100vh;
  overflow-x:hidden;
  position:relative;
}
::selection{background:var(--oro-vivo);color:var(--noche)}

/* ── El cielo de fondo: estrellas y polvo ──────────────────── */
#cielo{
  position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(ellipse at 20% 12%, rgba(201,162,39,.10), transparent 52%),
    radial-gradient(ellipse at 82% 78%, rgba(124,31,45,.11), transparent 48%),
    radial-gradient(ellipse at 55% 45%, rgba(23,90,73,.09), transparent 55%);
}
#estrellas{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.62}

/* ── Cabecera ──────────────────────────────────────────────── */
header#hud{
  position:fixed;top:0;left:0;right:0;z-index:60;
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
  padding:.6rem 1.4rem;
  background:linear-gradient(to bottom, rgba(13,16,32,.96), rgba(13,16,32,.78));
  border-bottom:1px solid rgba(168,128,31,.32);
  backdrop-filter:blur(6px);
  transition:background .4s ease;
}
#hud .marca{
  font-family:'Cormorant Garamond',Georgia,serif;
  font-size:.86rem;letter-spacing:.24em;color:var(--oro);
  text-transform:uppercase;white-space:nowrap;text-decoration:none;
}
#hud .marca:hover{color:var(--oro-palido)}

nav.principal{display:flex;gap:1.5rem;align-items:center}
nav.principal a{
  color:var(--tinta-tenue);text-decoration:none;
  font-size:.95rem;letter-spacing:.08em;
  border-bottom:1px solid transparent;padding-bottom:2px;
  transition:all .3s ease;
}
nav.principal a:hover{color:var(--oro-palido);border-bottom-color:var(--oro)}

/* ── Selector de idioma ────────────────────────────────────── */
.selector-idioma{position:relative}
#langBoton{
  font-family:'EB Garamond',serif;font-size:.9rem;
  background:none;border:1px solid rgba(168,128,31,.55);color:var(--oro);
  border-radius:999px;padding:.2rem .85rem;cursor:pointer;letter-spacing:.06em;
  transition:all .28s ease;display:flex;align-items:center;gap:.4rem;
}
#langBoton:hover{background:rgba(168,128,31,.14);border-color:var(--oro-vivo)}
#langMenu{
  position:absolute;top:calc(100% + .6rem);right:0;
  background:var(--noche-2);border:1px solid rgba(168,128,31,.4);
  border-radius:10px;padding:.4rem;min-width:150px;
  box-shadow:0 14px 40px rgba(0,0,0,.6);
  display:none;flex-direction:column;gap:.1rem;z-index:70;
}
#langMenu.abierto{display:flex;animation:aparecer .3s ease}
.lang-opcion{
  font-family:'EB Garamond',serif;font-size:.95rem;
  background:none;border:none;color:var(--tinta-tenue);
  text-align:left;padding:.42rem .8rem;border-radius:6px;cursor:pointer;
  transition:all .2s ease;
}
.lang-opcion:hover{background:rgba(168,128,31,.16);color:var(--oro-palido)}
.lang-opcion.activa{color:var(--oro-vivo)}
.lang-opcion.activa::before{content:"✦ ";font-size:.75em}

@keyframes aparecer{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}

/* ── Menú móvil ────────────────────────────────────────────── */
#menuBoton{
  display:none;background:none;border:1px solid rgba(168,128,31,.5);
  color:var(--oro);border-radius:8px;padding:.25rem .6rem;
  font-size:1.1rem;cursor:pointer;
}

/* ── Estructura general ────────────────────────────────────── */
main{position:relative;z-index:2}
section{padding:6.5rem 1.5rem;position:relative}
.marco{max-width:1080px;margin:0 auto}
.marco-estrecho{max-width:720px;margin:0 auto}

.kicker{
  font-family:'Cormorant Garamond',Georgia,serif;
  font-size:.82rem;letter-spacing:.32em;text-transform:uppercase;
  color:var(--oro);opacity:.85;margin-bottom:1.1rem;display:block;
}
h2{
  font-family:'Cormorant Garamond',Georgia,serif;
  font-size:clamp(2rem,5vw,3.1rem);font-weight:600;
  color:var(--oro-palido);line-height:1.15;margin-bottom:1.6rem;
  letter-spacing:.01em;
}
h3{
  font-family:'Cormorant Garamond',Georgia,serif;
  font-size:1.5rem;font-weight:600;color:var(--oro-palido);
  margin-bottom:.5rem;line-height:1.25;
}
p{margin-bottom:1.15rem}
em{font-style:italic;color:var(--oro-palido)}
.granate{color:var(--granate-claro);font-weight:500}
.esmeralda{color:var(--esmeralda-clara);font-weight:500}

/* ── Portada ───────────────────────────────────────────────── */
#portada{
  min-height:100vh;display:flex;flex-direction:column;
  align-items:center;justify-content:center;text-align:center;
  padding:8rem 1.5rem 4rem;position:relative;
}
.portada-kicker{
  font-family:'Cormorant Garamond',serif;
  font-size:clamp(.78rem,2vw,.95rem);letter-spacing:.4em;
  text-transform:uppercase;color:var(--oro);opacity:0;
  animation:surgir 2s ease .3s forwards;
}
h1{
  font-family:'Cormorant Garamond',Georgia,serif;
  font-size:clamp(2.8rem,10vw,6.4rem);
  font-weight:700;line-height:1.02;margin:1.4rem 0 .4rem;
  color:var(--pergamino);
  text-shadow:0 0 44px rgba(201,162,39,.32);
  opacity:0;animation:surgir 2.2s ease .7s forwards;
}
.morse{
  font-family:'Cormorant Garamond',serif;letter-spacing:.5em;
  color:var(--oro);opacity:0;font-size:.95rem;margin:.4rem 0 1.2rem;
  animation:surgir 2s ease 1.2s forwards;
}
.portada-autor{
  font-family:'Cormorant Garamond',serif;font-size:1.22rem;
  letter-spacing:.3em;text-transform:uppercase;color:var(--oro-palido);
  opacity:0;animation:surgir 2s ease 1.5s forwards;
}
.portada-frase{
  margin:2.6rem auto 0;max-width:540px;
  font-size:clamp(1.05rem,2.6vw,1.3rem);font-style:italic;
  color:var(--tinta-tenue);opacity:0;
  animation:surgir 2.2s ease 1.9s forwards;
}
.portada-frase span{display:block}
.portada-frase span:last-child{color:var(--oro-palido);margin-top:.3rem}

@keyframes surgir{to{opacity:1}}

.boton-umbral{
  display:inline-block;margin-top:3rem;
  font-family:'Cormorant Garamond',serif;font-size:1.12rem;
  letter-spacing:.22em;text-transform:uppercase;text-decoration:none;
  color:var(--oro-vivo);border:1px solid var(--oro);
  padding:.85rem 2.4rem;border-radius:999px;
  background:rgba(168,128,31,.05);
  transition:all .45s cubic-bezier(.2,.7,.3,1);
  opacity:0;animation:surgir 2s ease 2.3s forwards;
  position:relative;overflow:hidden;
}
.boton-umbral:hover{
  background:rgba(168,128,31,.18);color:var(--pergamino);
  border-color:var(--oro-vivo);
  box-shadow:0 0 34px rgba(201,162,39,.4);
  letter-spacing:.28em;
}
.descenso{
  position:absolute;bottom:2.2rem;left:50%;transform:translateX(-50%);
  font-size:.74rem;letter-spacing:.3em;text-transform:uppercase;
  color:var(--oro);opacity:0;animation:surgir 2s ease 3s forwards;
}
.descenso::after{
  content:"";display:block;width:1px;height:34px;margin:.6rem auto 0;
  background:linear-gradient(to bottom,var(--oro),transparent);
  animation:latir 2.6s ease-in-out infinite;
}
@keyframes latir{0%,100%{opacity:.3}50%{opacity:1}}

/* ── Advertencia ───────────────────────────────────────────── */
#advertencia{
  background:linear-gradient(to bottom, transparent, rgba(20,25,49,.55), transparent);
}
.pergamino-caja{
  border:1px solid rgba(168,128,31,.28);border-radius:4px;
  padding:clamp(1.8rem,5vw,3.4rem);
  background:rgba(20,25,49,.42);
  backdrop-filter:blur(2px);
  position:relative;
}
.pergamino-caja::before,.pergamino-caja::after{
  content:"✦";position:absolute;color:var(--oro);font-size:.9rem;opacity:.6;
}
.pergamino-caja::before{top:-.65rem;left:1.6rem;background:var(--noche);padding:0 .5rem}
.pergamino-caja::after{bottom:-.65rem;right:1.6rem;background:var(--noche);padding:0 .5rem}
.nota-viajero{
  margin-top:2rem;padding-top:1.4rem;
  border-top:1px solid rgba(168,128,31,.22);
  font-size:.95rem;font-style:italic;color:var(--oro);opacity:.8;
  margin-bottom:0;
}

/* ── Los siete libros ──────────────────────────────────────── */
.intro-seccion{
  max-width:640px;margin-bottom:3.4rem;color:var(--tinta-tenue);
}
.rejilla-libros{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(310px,1fr));
  gap:1.5rem;
}
.carta-libro{
  border:1px solid rgba(168,128,31,.22);border-radius:4px;
  padding:1.9rem 1.7rem 1.7rem;
  background:linear-gradient(160deg, rgba(29,35,64,.72), rgba(20,25,49,.5));
  position:relative;overflow:hidden;
  transition:transform .5s cubic-bezier(.2,.7,.3,1), border-color .5s ease, box-shadow .5s ease;
  display:flex;flex-direction:column;
}
.carta-libro::before{
  content:"";position:absolute;top:0;left:0;width:100%;height:3px;
  background:var(--color-puerta);opacity:.75;
}
.carta-libro:hover{
  transform:translateY(-7px);
  border-color:var(--color-puerta);
  box-shadow:0 18px 48px rgba(0,0,0,.5), 0 0 30px var(--color-halo);
}
.numero-puerta{
  font-family:'Cormorant Garamond',serif;
  font-size:3.4rem;font-weight:700;line-height:1;
  color:var(--color-puerta);opacity:.32;
  position:absolute;top:1.1rem;right:1.4rem;
  transition:opacity .5s ease;
}
.carta-libro:hover .numero-puerta{opacity:.6}
.etiqueta-principio{
  font-family:'Cormorant Garamond',serif;
  font-size:.7rem;letter-spacing:.24em;text-transform:uppercase;
  color:var(--color-puerta);margin-bottom:.7rem;display:block;
}
.libro-tomo{
  font-size:.86rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--oro);opacity:.75;margin-bottom:.35rem;
}
.libro-lema{
  font-family:'Cormorant Garamond',serif;
  font-size:1.42rem;color:var(--oro-palido);
  line-height:1.22;margin-bottom:.9rem;font-weight:600;
}
.libro-desc{
  font-size:.96rem;line-height:1.68;color:var(--tinta-tenue);
  margin-bottom:1.5rem;flex-grow:1;
}
.boton-abrir{
  display:inline-block;align-self:flex-start;
  font-family:'Cormorant Garamond',serif;font-size:.92rem;
  letter-spacing:.2em;text-transform:uppercase;text-decoration:none;
  color:var(--color-puerta);border:1px solid var(--color-puerta);
  padding:.42rem 1.5rem;border-radius:999px;
  transition:all .35s ease;
}
.boton-abrir:hover{
  background:var(--color-puerta);color:var(--noche);
  box-shadow:0 0 22px var(--color-halo);
}

/* ── Los sellos ────────────────────────────────────────────── */
#sellos-seccion{text-align:center}
.hilera-sellos{
  display:flex;justify-content:center;flex-wrap:wrap;
  gap:1.1rem;margin:3rem 0 2rem;
}
.sello{
  width:66px;height:66px;border-radius:50%;
  border:1.6px solid var(--oro);opacity:.42;
  display:flex;align-items:center;justify-content:center;
  font-family:'Cormorant Garamond',serif;font-weight:700;font-size:1.5rem;
  color:transparent;cursor:pointer;position:relative;
  transition:all .8s cubic-bezier(.2,.7,.3,1);
}
.sello:hover,.sello.despierto{
  opacity:1;color:var(--noche);
  background:radial-gradient(circle at 34% 28%, var(--oro-palido), var(--oro-vivo) 62%, var(--oro));
  box-shadow:0 0 26px rgba(201,162,39,.7);
  transform:scale(1.06);
}
.palabra-revelada{
  font-family:'Cormorant Garamond',serif;
  font-size:clamp(1.6rem,5vw,2.6rem);letter-spacing:.5em;
  color:var(--oro-vivo);text-transform:uppercase;
  opacity:0;transform:translateY(12px);
  transition:all 1.4s ease;margin-top:1.6rem;
  text-shadow:0 0 30px rgba(201,162,39,.5);
}
.palabra-revelada.visible{opacity:1;transform:none}
.aviso-sellos{
  font-size:.95rem;color:var(--esmeralda-clara);font-style:italic;
  opacity:0;transition:opacity 1s ease;margin-top:.6rem;
}
.aviso-sellos.visible{opacity:1}

/* ── Amazon ────────────────────────────────────────────────── */
#amazon{
  background:linear-gradient(to bottom, transparent, rgba(124,31,45,.14), transparent);
  text-align:center;
}
.boton-amazon{
  display:inline-block;margin-top:1.6rem;
  font-family:'Cormorant Garamond',serif;
  font-size:clamp(1rem,2.6vw,1.22rem);
  letter-spacing:.2em;text-transform:uppercase;text-decoration:none;
  color:var(--noche);
  background:linear-gradient(135deg,var(--oro-palido),var(--oro-vivo) 55%,var(--oro));
  padding:1rem 2.8rem;border-radius:999px;font-weight:600;
  box-shadow:0 10px 34px rgba(201,162,39,.32);
  transition:all .45s cubic-bezier(.2,.7,.3,1);
}
.boton-amazon:hover{
  transform:translateY(-4px) scale(1.02);
  box-shadow:0 18px 50px rgba(201,162,39,.5);
  letter-spacing:.26em;
}

/* ── Autor ─────────────────────────────────────────────────── */
.cita-escriba{
  border-left:2px solid var(--esmeralda);
  padding-left:1.6rem;margin-top:2rem;
  font-style:italic;color:var(--esmeralda-clara);
  font-size:1.08rem;
}

/* ── Redes sociales ────────────────────────────────────────── */
#redes{text-align:center}
.rejilla-redes{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));
  gap:1rem;margin-top:2.6rem;
}
.enlace-red{
  border:1px solid rgba(168,128,31,.24);border-radius:4px;
  padding:1.15rem .8rem;text-decoration:none;
  color:var(--tinta-tenue);
  background:rgba(20,25,49,.42);
  transition:all .4s cubic-bezier(.2,.7,.3,1);
  display:flex;flex-direction:column;align-items:center;gap:.5rem;
}
.enlace-red:hover{
  color:var(--oro-palido);border-color:var(--oro);
  background:rgba(168,128,31,.1);
  transform:translateY(-4px);
  box-shadow:0 12px 30px rgba(0,0,0,.4);
}
.enlace-red svg{width:24px;height:24px;fill:currentColor;opacity:.9}
.enlace-red span{
  font-size:.85rem;letter-spacing:.12em;text-transform:uppercase;
  font-family:'Cormorant Garamond',serif;
}

/* ── Pie ───────────────────────────────────────────────────── */
footer{
  border-top:1px solid rgba(168,128,31,.22);
  padding:3.4rem 1.5rem 2.6rem;text-align:center;
  position:relative;z-index:2;
  background:rgba(13,16,32,.6);
}
.frase-pie{
  font-family:'Cormorant Garamond',serif;
  font-size:1.18rem;font-style:italic;color:var(--oro-palido);
  margin-bottom:1.2rem;
}
.legal-pie{font-size:.85rem;color:var(--tinta-tenue);opacity:.62;margin-bottom:0}

/* ── Biblioteca (feed) ─────────────────────────────────────── */
.cabecera-interna{
  padding:9rem 1.5rem 3rem;text-align:center;
}
.volver{
  display:inline-block;margin-bottom:2.4rem;
  color:var(--oro);text-decoration:none;font-size:.92rem;
  letter-spacing:.14em;transition:all .3s ease;
}
.volver:hover{color:var(--oro-palido);letter-spacing:.18em}

.rejilla-feed{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));
  gap:1.6rem;margin-top:3rem;
}
.carta-feed{
  border:1px solid rgba(168,128,31,.22);border-radius:4px;
  padding:1.9rem 1.7rem;
  background:linear-gradient(160deg, rgba(29,35,64,.7), rgba(20,25,49,.48));
  transition:all .5s cubic-bezier(.2,.7,.3,1);
  display:flex;flex-direction:column;
}
.carta-feed:hover{
  transform:translateY(-6px);border-color:var(--oro);
  box-shadow:0 18px 44px rgba(0,0,0,.5);
}
.feed-etiqueta{
  font-family:'Cormorant Garamond',serif;font-size:.7rem;
  letter-spacing:.24em;text-transform:uppercase;
  color:var(--esmeralda-clara);margin-bottom:.6rem;display:block;
}
.feed-titulo{
  font-family:'Cormorant Garamond',serif;font-size:1.4rem;
  color:var(--oro-palido);line-height:1.24;margin-bottom:.8rem;font-weight:600;
}
.feed-texto{
  font-size:.96rem;line-height:1.7;color:var(--tinta-tenue);
  margin-bottom:1.4rem;flex-grow:1;
}
.feed-enlace{
  align-self:flex-start;font-family:'Cormorant Garamond',serif;
  font-size:.88rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--oro);text-decoration:none;
  border-bottom:1px solid rgba(168,128,31,.5);padding-bottom:2px;
  transition:all .3s ease;
}
.feed-enlace:hover{color:var(--oro-palido);border-bottom-color:var(--oro-vivo)}

.caja-proximamente{
  margin-top:3.4rem;padding:2.4rem;text-align:center;
  border:1px dashed rgba(168,128,31,.3);border-radius:4px;
  background:rgba(20,25,49,.3);
}
.caja-proximamente h3{color:var(--oro);opacity:.85}
.caja-proximamente p{color:var(--tinta-tenue);max-width:560px;margin:0 auto;font-size:.98rem}

/* ── Aparición al desplazar ────────────────────────────────── */
.revelar{opacity:0;transform:translateY(26px);transition:opacity 1.1s ease, transform 1.1s cubic-bezier(.2,.7,.3,1)}
.revelar.visible{opacity:1;transform:none}

/* ── Adaptación a pantallas pequeñas ───────────────────────── */
@media (max-width:860px){
  #menuBoton{display:block}
  nav.principal{
    position:fixed;top:56px;left:0;right:0;
    background:var(--noche-2);
    border-bottom:1px solid rgba(168,128,31,.3);
    flex-direction:column;gap:0;padding:.6rem 0;
    display:none;
  }
  nav.principal.abierto{display:flex;animation:aparecer .3s ease}
  nav.principal a{padding:.75rem 1.5rem;width:100%;border-bottom:none}
  nav.principal a:hover{background:rgba(168,128,31,.12);border-bottom:none}
  section{padding:4.6rem 1.2rem}
  body{font-size:18px}
  .sello{width:54px;height:54px;font-size:1.25rem}
  .hilera-sellos{gap:.7rem}
  .cabecera-interna{padding:7rem 1.2rem 2rem}

  /* El título necesita aire en pantallas estrechas */
  #portada{padding:7rem 1.6rem 4rem}
  h1{font-size:clamp(2.3rem,12vw,3.4rem);letter-spacing:-.01em;hyphens:none}
  .portada-kicker{letter-spacing:.24em;line-height:1.6}
  .morse{font-size:.8rem;letter-spacing:.34em}
  .portada-autor{font-size:1.05rem;letter-spacing:.22em}
  .portada-frase{font-size:1.02rem;margin-top:2rem}
  .boton-umbral{
    margin-top:2.4rem;padding:.8rem 1.9rem;
    font-size:.98rem;letter-spacing:.16em;
  }
  .boton-umbral:hover{letter-spacing:.19em}
  .boton-amazon{padding:.9rem 1.8rem;letter-spacing:.14em;font-size:.98rem}
  .boton-amazon:hover{letter-spacing:.17em}
  #hud{padding:.5rem .9rem}
  #hud .marca{font-size:.72rem;letter-spacing:.16em}
  h2{font-size:clamp(1.75rem,7vw,2.4rem)}
}

/* Pantallas muy estrechas */
@media (max-width:400px){
  h1{font-size:2.1rem}
  #hud .marca{font-size:.66rem;letter-spacing:.12em}
  .sello{width:46px;height:46px;font-size:1.1rem}
  .hilera-sellos{gap:.5rem}
  .palabra-revelada{letter-spacing:.32em;font-size:1.4rem}
}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms !important;transition-duration:.01ms !important}
  .revelar{opacity:1;transform:none}
}