/* =========================================================
   LIBROS Y DICCIONARIOS · Erik Arias
   Paleta: blanco, azul marino, gris claro y detalles dorados
   ========================================================= */
:root{
  --azul:#0B2545;
  --azul-medio:#155D8F;
  --azul-claro:#6DCDE1;
  --oro:#C8A44D;
  --oro-claro:#E7C478;
  --gris:#F4F6F9;
  --gris-borde:#E2E7EE;
  --texto:#10243A;
  --texto-suave:#4C5C70;
  --blanco:#FFFFFF;
  --serif:"Cormorant Garamond","Lora",Georgia,"Times New Roman",serif;
  --sans:"Montserrat","Poppins",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  --sombra:0 18px 50px rgba(11,37,69,.10);
  --sombra-fuerte:0 26px 70px rgba(11,37,69,.18);
  --radio:18px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--blanco);color:var(--texto);
  font-family:var(--sans);font-size:17px;line-height:1.65;font-weight:400;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--azul-medio)}
h1,h2,h3{font-family:var(--serif);font-weight:600;line-height:1.1;margin:0 0 .5em;color:var(--azul)}
.contenedor{width:min(1220px,92vw);margin-inline:auto}
.kicker{
  font-size:.74rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--oro);font-weight:600;margin:0 0 .9rem
}
.saltar{position:absolute;left:-9999px}
.saltar:focus{left:1rem;top:1rem;z-index:99;background:var(--azul);color:#fff;padding:.7rem 1.1rem;border-radius:8px}

/* ---------- CABECERA ---------- */
.cabecera{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.93);backdrop-filter:blur(10px);border-bottom:1px solid var(--gris-borde)}
.cabecera__fila{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.7rem 0}
.marca img{width:190px;height:auto}
.menu{display:flex;gap:2rem}
.menu a{
  color:var(--texto);text-decoration:none;font-size:.86rem;font-weight:500;
  letter-spacing:.04em;padding:.4rem 0;border-bottom:2px solid transparent;transition:.25s
}
.menu a:hover{color:var(--azul-medio);border-color:var(--oro)}
.menu__boton{display:none;background:none;border:0;padding:.5rem;cursor:pointer}
.menu__boton span{display:block;width:26px;height:2px;background:var(--azul);margin:5px 0;transition:.3s}
.menu-movil{display:none;flex-direction:column;border-top:1px solid var(--gris-borde);background:#fff}
.menu-movil a{padding:1rem 4vw;text-decoration:none;color:var(--texto);border-bottom:1px solid var(--gris-borde);font-size:.95rem}

/* ---------- HÉROE ---------- */
.heroe{
  position:relative;overflow:hidden;
  background:
    radial-gradient(1100px 620px at 78% 18%, rgba(109,205,225,.20), transparent 62%),
    linear-gradient(160deg,#0B2545 0%,#123A67 52%,#0B2545 100%);
  color:#fff;padding:clamp(3rem,7vw,6rem) 0 clamp(3rem,6vw,5rem)
}
.heroe::after{
  content:"";position:absolute;inset:auto 0 -1px 0;height:120px;
  background:linear-gradient(to bottom,transparent,rgba(255,255,255,.96))
}
.heroe__fila{display:grid;grid-template-columns:1fr 1.15fr;gap:clamp(1.5rem,4vw,4rem);align-items:center;position:relative;z-index:2}
.heroe h1{color:#fff;font-size:clamp(2.9rem,6.4vw,5.1rem);letter-spacing:.01em;margin-bottom:1.1rem}
.heroe__sub{font-size:clamp(1rem,1.5vw,1.16rem);color:#DCE6F2;max-width:34ch;margin:0 0 1rem}
.heroe__nota{color:var(--oro-claro);font-weight:500;letter-spacing:.03em;margin:0 0 2rem}
.heroe__imagen img{filter:drop-shadow(0 30px 45px rgba(0,0,0,.45))}

/* ---------- BOTONES ---------- */
.boton{
  display:inline-flex;flex-direction:column;align-items:center;justify-content:center;
  text-align:center;text-decoration:none;font-family:var(--sans);font-weight:600;
  font-size:.95rem;letter-spacing:.04em;padding:1rem 1.9rem;border-radius:999px;
  transition:transform .2s,box-shadow .2s,background .2s;min-height:56px;cursor:pointer;border:0
}
.boton span{display:block;font-weight:400;font-size:.76rem;opacity:.85;letter-spacing:.06em;margin-top:.15rem}
.boton--oro{background:linear-gradient(135deg,#E7C478,#C8A44D);color:#22180A;box-shadow:0 12px 30px rgba(200,164,77,.35)}
.boton--oro:hover{transform:translateY(-2px);box-shadow:0 16px 38px rgba(200,164,77,.45)}
.boton--azul{background:var(--azul);color:#fff;box-shadow:0 12px 30px rgba(11,37,69,.25)}
.boton--azul:hover{background:var(--azul-medio);transform:translateY(-2px)}
.boton--linea{background:transparent;color:var(--azul);border:2px solid var(--azul);padding:.85rem 1.8rem}
.boton--linea:hover{background:var(--azul);color:#fff}
.boton--ancho{width:100%}
.boton:focus-visible,.mini:focus-visible,.menu a:focus-visible{outline:3px solid var(--azul-claro);outline-offset:3px}

/* ---------- SECCIONES ---------- */
.seccion{padding:clamp(3.4rem,7vw,6rem) 0}
.seccion--clara{background:var(--gris);border-block:1px solid var(--gris-borde)}
.titulo-seccion{text-align:center;max-width:46rem;margin:0 auto clamp(2rem,4vw,3.4rem)}
.titulo-seccion h2{font-size:clamp(2rem,4vw,3rem);margin-bottom:.6rem}
.titulo-seccion__sub{color:var(--texto-suave);margin:0}

/* ---------- PRODUCTOS ---------- */
.productos{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(1.5rem,3vw,2.5rem);align-items:start}
.producto{
  background:#fff;border:1px solid var(--gris-borde);border-radius:var(--radio);
  box-shadow:var(--sombra);overflow:hidden;position:relative;scroll-margin-top:90px
}
.etiqueta{
  position:absolute;top:1.1rem;left:1.1rem;z-index:3;
  background:var(--azul);color:#fff;font-size:.68rem;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;padding:.5rem .95rem;border-radius:999px
}
.etiqueta--oro{background:linear-gradient(135deg,#E7C478,#C8A44D);color:#22180A}

/* galería */
.galeria{background:linear-gradient(180deg,#FAFBFD,#EEF2F7);padding:1.2rem 1.2rem .9rem}
.galeria__marco{margin:0;border-radius:12px;overflow:hidden;background:#fff}
.galeria__zoom{display:block;width:100%;padding:0;border:0;background:none;cursor:zoom-in}
.galeria__marco img{width:100%;aspect-ratio:4/3;object-fit:contain;background:#fff;transition:opacity .25s}
.galeria__marco img.cambiando{opacity:0}
.miniaturas{display:grid;grid-template-columns:repeat(6,1fr);gap:.5rem;margin-top:.8rem}
.mini{padding:0;border:2px solid transparent;border-radius:8px;overflow:hidden;background:#fff;cursor:pointer;transition:.2s;aspect-ratio:1;line-height:0}
.mini img{width:100%;height:100%;object-fit:cover}
.mini:hover{transform:translateY(-2px)}
.mini.activa{border-color:var(--oro)}

.producto__cuerpo{padding:clamp(1.4rem,2.4vw,2.2rem)}
.producto__cuerpo h3{font-size:clamp(1.5rem,2.2vw,1.95rem);margin-bottom:.35rem}
.producto__cuerpo h3 span{display:block;font-size:.62em;color:var(--texto-suave);font-weight:500}
.producto__autor{font-size:.78rem;letter-spacing:.2em;text-transform:uppercase;color:var(--oro);font-weight:600;margin:0 0 1rem}
.producto__desc{color:var(--texto-suave);margin:0 0 1.3rem}
.caracteristicas{list-style:none;padding:0;margin:0 0 1.2rem;display:grid;gap:.5rem}
.caracteristicas li{position:relative;padding-left:1.6rem;font-size:.93rem}
.caracteristicas li::before{
  content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:50%;
  background:linear-gradient(135deg,#E7C478,#C8A44D)
}
.aviso-compra{
  background:var(--gris);border-left:3px solid var(--azul-claro);border-radius:0 8px 8px 0;
  padding:.75rem 1rem;font-size:.87rem;color:var(--texto-suave);margin:0 0 1.3rem
}
.botones-tomos{display:grid;gap:.7rem}
.enlace-secundario{display:inline-block;margin-top:1rem;font-size:.85rem;color:var(--azul-medio);text-decoration:none;border-bottom:1px solid var(--gris-borde)}
.enlace-secundario:hover{border-color:var(--azul-medio)}


/* ---------- tarjeta ancha (segundo libro) ---------- */
.producto--ancho{display:grid;grid-template-columns:.95fr 1.05fr;align-items:center}
.producto--ancho .galeria{height:100%;display:flex;flex-direction:column;justify-content:center}
.producto--ancho .galeria__marco img{aspect-ratio:3/4;object-fit:contain}
.miniaturas--tres{grid-template-columns:repeat(3,1fr);max-width:320px}
.producto--ancho .etiqueta{left:auto;right:1.1rem}
@media (max-width:1000px){
  .producto--ancho{grid-template-columns:1fr}
  .miniaturas--tres{max-width:none}
}

/* ---------- COMPARACIÓN ---------- */
.comparacion{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(1.2rem,3vw,2.2rem);max-width:60rem;margin-inline:auto}
.comparacion__col{background:#fff;border:1px solid var(--gris-borde);border-radius:var(--radio);padding:clamp(1.6rem,3vw,2.4rem);text-align:center;box-shadow:var(--sombra)}
.comparacion__col h3{font-size:1.65rem}
.comparacion__col ul{list-style:none;padding:0;margin:0 0 1.6rem;color:var(--texto-suave);display:grid;gap:.55rem;font-size:.94rem}

/* ---------- AUTOR ---------- */
.seccion--autor{background:linear-gradient(180deg,#fff 0%,#F7F9FC 100%)}
.autor{display:grid;grid-template-columns:.85fr 1.15fr;gap:clamp(1.5rem,4vw,4rem);align-items:center}
.autor__foto{position:relative}
.autor__foto::before{
  content:"";position:absolute;inset:8% -4% -4% 8%;border-radius:var(--radio);
  background:linear-gradient(150deg,rgba(21,93,143,.12),rgba(200,164,77,.16))
}
.autor__foto img{position:relative;border-radius:var(--radio);filter:drop-shadow(0 22px 38px rgba(11,37,69,.20))}
.autor__texto h2{font-size:clamp(2rem,3.4vw,2.8rem)}
.autor__texto p{color:var(--texto-suave);margin:0 0 1rem}
.autor__texto .boton{margin-top:.8rem}

.proximamente{text-align:center;color:#8E9AAA;font-size:.85rem;letter-spacing:.14em;text-transform:uppercase;padding:0 0 clamp(2.5rem,5vw,4rem)}

/* ---------- PIE ---------- */
.pie{background:var(--azul);color:#C9D6E6;padding:clamp(2.5rem,5vw,3.6rem) 0 2rem;font-size:.9rem}
.pie__fila{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:1.6rem;padding-bottom:1.6rem;border-bottom:1px solid rgba(255,255,255,.12)}
.pie__marca{display:flex;align-items:center;gap:1rem}
.pie__marca img{width:150px;filter:brightness(0) invert(1);opacity:.92}
.pie__marca p{margin:0;color:#fff;font-family:var(--serif);font-size:1.1rem}
.pie__enlaces{display:flex;gap:1.6rem;flex-wrap:wrap}
.pie__enlaces a{color:#C9D6E6;text-decoration:none;border-bottom:1px solid transparent;transition:.2s}
.pie__enlaces a:hover{color:var(--oro-claro);border-color:var(--oro-claro)}
.pie__aviso{margin:1.4rem 0 .4rem;font-size:.82rem;color:#9FB2C9}
.pie__copy{margin:0;font-size:.82rem;color:#7F93AC}

/* ---------- VISOR ---------- */
.visor{position:fixed;inset:0;z-index:80;background:rgba(6,18,34,.92);display:flex;align-items:center;justify-content:center;padding:4vw}
.visor[hidden]{display:none}
.visor img{max-width:96vw;max-height:88vh;border-radius:10px;box-shadow:var(--sombra-fuerte)}
.visor__cerrar{position:absolute;top:1.2rem;right:1.6rem;background:none;border:0;color:#fff;font-size:2.6rem;line-height:1;cursor:pointer}

/* ---------- ANIMACIONES ---------- */
.js .aparece{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.js .aparece.visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js .aparece{opacity:1;transform:none;transition:none}
  .boton{transition:none}
}

/* ---------- RESPONSIVE ---------- */
@media (max-width:1000px){
  .productos{grid-template-columns:1fr}
  .heroe__fila{grid-template-columns:1fr;text-align:center}
  .heroe__sub{margin-inline:auto}
  .heroe__imagen{order:-1}
  .autor{grid-template-columns:1fr}
  .autor__foto{max-width:420px;margin-inline:auto}
}
@media (max-width:760px){
  body{font-size:16px}
  .menu{display:none}
  .menu__boton{display:block}
  .menu-movil[data-abierto]{display:flex}
  .miniaturas{grid-template-columns:repeat(3,1fr)}
  .comparacion{grid-template-columns:1fr}
  .pie__fila{flex-direction:column;align-items:flex-start}
  .marca img{width:160px}
}