/* =========================================================
   /estilos/estilo.css — EbooksYa
   Identidad: tech, rápida, descarga instantánea ("ya").
   Acento eléctrico (cobalto + cian) sobre fondo casi negro.
   Microinteracciones CSS, mobile-first, fuentes de sistema.
   ========================================================= */

/* =============== Tokens ================================= */
:root{
  /* Paleta EbooksYa — eléctrica: cobalto + cian sobre casi negro */
  --c-fondo:#070a12;
  --c-superficie:#0e131f;
  --c-superficie-2:#161d2c;
  --c-borde:#222b3d;
  --c-borde-fuerte:#33405a;
  --c-texto:#eef2fb;
  --c-texto-secundario:#9aa6bf;
  --c-texto-tenue:#5d6884;
  --c-acento:#2563eb;            /* cobalto eléctrico: acción */
  --c-acento-claro:#4f86ff;
  --c-acento-oscuro:#1d4ed8;
  --c-secundario:#06b6d4;        /* cian: energía / velocidad */
  --c-secundario-claro:#22d3ee;
  --c-error:#f0473a;
  --c-ok:#22c55e;

  /* Tinte de acento para fondos/bordes translúcidos (cobalto) */
  --c-acento-rgb:37,99,235;
  --c-secundario-rgb:6,182,212;
  --tint-acento:rgba(37,99,235,.12);
  --tint-acento-fuerte:rgba(37,99,235,.24);

  /* Tipografía (fuentes de sistema, por velocidad) */
  --ff:'Segoe UI Variable Display','Segoe UI',system-ui,-apple-system,'Helvetica Neue',Helvetica,Arial,'Liberation Sans',sans-serif;
  --fs-h1:clamp(2rem,3.4vw,3rem);
  --fs-h2:clamp(1.5rem,2.4vw,2rem);
  --fs-h3:clamp(1.2rem,1.8vw,1.4rem);
  --fs-lead:clamp(1.05rem,1.3vw,1.18rem);
  --lh-tight:1.12;
  --lh:1.65;

  /* Espacio */
  --gap-xs:.4rem;
  --gap-sm:.75rem;
  --gap:1.25rem;
  --gap-lg:2rem;
  --gap-xl:3rem;

  /* Radios — algo más definidos que v3 (look "directo") */
  --rad-sm:6px;
  --rad:10px;
  --rad-lg:16px;
  --rad-pill:999px;

  /* Sombras + glow coral para elementos de acción */
  --sh-sm:0 1px 2px rgba(0,0,0,.4);
  --sh:0 4px 16px rgba(0,0,0,.45);
  --sh-lg:0 14px 34px rgba(0,0,0,.58);
  --glow:0 6px 22px rgba(var(--c-acento-rgb),.32);

  /* Velocidades */
  --t-fast:.15s ease;
  --t:.2s cubic-bezier(.4,0,.2,1);
  --t-slow:.5s cubic-bezier(.4,0,.2,1);
}

/* =============== Reset ================================== */
*,*::before,*::after{box-sizing:border-box}
*{margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--ff);
  background:var(--c-fondo);
  color:var(--c-texto);
  line-height:var(--lh);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--c-acento);text-decoration:none;transition:color var(--t-fast)}
a:hover{color:var(--c-acento-claro)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select,textarea{font:inherit;color:inherit}

/* =============== Accesibilidad ========================== */
.visually-hidden{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;
}
.skip-link{
  position:absolute;left:-9999px;top:0;background:var(--c-acento);color:var(--c-fondo);
  padding:.6rem 1rem;font-weight:700;border-radius:0 0 var(--rad) 0;z-index:200;
}
.skip-link:focus{left:0}
a:focus-visible,button:focus-visible,input:focus-visible,
.btn:focus-visible,.menu-toggle:focus-visible{
  outline:2px solid var(--c-acento);outline-offset:3px;border-radius:6px;
}
/* En botones de fondo coral el outline coral es invisible → outline claro */
.hero-search__btn:focus-visible,
.btn--epub:focus-visible,.btn--pdf:focus-visible,.btn--mobi:focus-visible{
  outline-color:#fff;outline-offset:4px;
}

/* =============== Layout ================================= */
.container{max-width:1240px;margin:0 auto;padding:0 clamp(16px,3vw,28px)}
main{padding:clamp(20px,3vw,40px) 0 clamp(40px,6vw,72px)}
section{margin-block:clamp(28px,5vw,56px)}
section:first-child{margin-top:0}

/* =============== Tipografía ============================= */
h1,h2,h3,h4{line-height:var(--lh-tight);font-weight:800;letter-spacing:-.01em}
h1{font-size:var(--fs-h1)}
h2{font-size:var(--fs-h2)}
h3{font-size:var(--fs-h3)}
.lead{font-size:var(--fs-lead);color:var(--c-texto-secundario);max-width:65ch}
.section-title{
  display:flex;align-items:baseline;justify-content:space-between;
  margin-bottom:clamp(18px,2.6vw,28px);gap:1rem;flex-wrap:wrap;
}
.section-title h2{margin:0}
.section-title .more{
  color:var(--c-texto-secundario);font-size:.95rem;font-weight:600;
}
.section-title .more:hover{color:var(--c-acento)}

/* =============== Header ================================= */
.main-header{
  position:sticky;top:0;z-index:100;
  background:rgba(7,10,18,.85);
  backdrop-filter:saturate(140%) blur(12px);
  -webkit-backdrop-filter:saturate(140%) blur(12px);
  border-bottom:1px solid var(--c-borde);
}
.main-header__inner{
  display:flex;align-items:center;gap:1.25rem;padding:12px 0;
}
.logo{display:inline-flex;align-items:center;line-height:0}
.logo img{width:48px;height:48px;transition:transform var(--t)}
.logo:hover img{transform:rotate(-3deg) scale(1.04)}

.main-nav{display:flex;align-items:center;gap:1.5rem;margin-left:auto}
.main-nav ul{list-style:none;display:flex;gap:.4rem}
.main-nav ul a{
  display:inline-block;padding:.55rem .9rem;border-radius:var(--rad-pill);
  font-weight:700;font-size:.95rem;color:var(--c-texto);
  letter-spacing:.01em;transition:background var(--t),color var(--t-fast);
}
.main-nav ul a:hover{background:var(--c-superficie);color:var(--c-acento)}

/* Buscador en header */
.header-search{
  position:relative;display:flex;align-items:center;
  background:var(--c-superficie);border:1px solid var(--c-borde);
  border-radius:var(--rad-pill);padding:.35rem .9rem .35rem 2.3rem;
  min-width:240px;transition:border-color var(--t-fast),background var(--t-fast),box-shadow var(--t);
}
.header-search:focus-within{
  border-color:var(--c-acento);background:var(--c-superficie-2);
  box-shadow:0 0 0 3px rgba(37,99,235,.18);
}
.header-search__icon{
  position:absolute;left:.7rem;top:50%;transform:translateY(-50%);
  width:18px;height:18px;fill:var(--c-texto-secundario);
}
.header-search input{
  background:transparent;border:0;outline:0;color:var(--c-texto);
  width:100%;padding:.35rem 0;font-size:.95rem;
}
.header-search input::placeholder{color:var(--c-texto-tenue)}

/* Menú móvil */
.menu-toggle{display:none;width:34px;height:26px;position:relative;margin-left:auto}
.menu-toggle span{
  position:absolute;left:0;right:0;height:3px;background:var(--c-texto);
  border-radius:3px;transition:transform var(--t),opacity var(--t-fast),top var(--t);
}
.menu-toggle span:nth-child(1){top:0}
.menu-toggle span:nth-child(2){top:50%;transform:translateY(-50%)}
.menu-toggle span:nth-child(3){bottom:0}
.menu-toggle.is-active span:nth-child(1){top:50%;transform:translateY(-50%) rotate(45deg)}
.menu-toggle.is-active span:nth-child(2){opacity:0}
.menu-toggle.is-active span:nth-child(3){bottom:auto;top:50%;transform:translateY(-50%) rotate(-45deg)}

/* =============== Botones ================================ */
.btn{
  --bg:var(--c-acento);
  --fg:var(--c-fondo);
  display:inline-flex;align-items:center;justify-content:center;gap:.6rem;
  padding:.85rem 1.2rem;border-radius:var(--rad);
  background:var(--bg);color:var(--fg);
  font-weight:700;font-size:1rem;letter-spacing:.01em;
  text-align:center;text-decoration:none;
  transition:transform var(--t-fast),box-shadow var(--t),background var(--t-fast);
  position:relative;overflow:hidden;
}
.btn svg{width:1.15em;height:1.15em;flex:none}
.btn small{font-size:.8em;font-weight:600;opacity:.85;margin-left:.25em}
.btn:hover{transform:translateY(-2px);box-shadow:var(--sh)}
.btn:active{transform:translateY(0)}
.btn--amazon{--bg:#FF9900;--fg:#111}
.btn--amazon:hover{background:#ffad33}
.btn--epub,.btn--pdf,.btn--mobi{background:var(--c-acento);color:var(--c-fondo)}
.btn--epub:hover,.btn--pdf:hover,.btn--mobi:hover{background:var(--c-acento-claro)}
.btn--secundario{--bg:var(--c-secundario);--fg:var(--c-fondo)}
.btn--secundario:hover{background:var(--c-secundario-claro)}
.btn--ghost{--bg:transparent;--fg:var(--c-texto);border:1px solid var(--c-borde)}
.btn--ghost:hover{background:var(--c-superficie);color:var(--c-acento);border-color:var(--c-acento)}
.btn--disabled{
  background:var(--c-superficie);color:var(--c-texto-secundario);
  cursor:not-allowed;pointer-events:none;border:1px solid var(--c-borde);
}
.botones-descarga{display:grid;gap:.7rem}

/* CTA inline (pildora con flecha) */
.cta-inline{
  display:inline-flex;align-items:center;gap:.4rem;
  padding:.5rem .9rem;border-radius:var(--rad-pill);
  background:var(--c-superficie);border:1px solid var(--c-borde);
  color:var(--c-texto);font-weight:700;font-size:.92rem;
  transition:background var(--t-fast),color var(--t-fast),border-color var(--t-fast);
}
.cta-inline::after{content:"›";transition:transform var(--t-fast)}
.cta-inline:hover{background:var(--c-acento);color:var(--c-fondo);border-color:var(--c-acento)}
.cta-inline:hover::after{transform:translateX(3px)}

/* =============== Hero (home) ============================ */
.hero{
  position:relative;padding:clamp(36px,7vw,72px) 0 clamp(28px,5vw,56px);
  overflow:hidden;border-bottom:1px solid var(--c-borde);
}
.hero::before{
  content:"";position:absolute;inset:-20% -10% auto auto;
  width:560px;height:560px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(37,99,235,.18),transparent 70%);
  pointer-events:none;z-index:0;
}
.hero::after{
  content:"";position:absolute;inset:auto auto -30% -10%;
  width:480px;height:480px;border-radius:50%;
  background:radial-gradient(closest-side,rgba(6,182,212,.12),transparent 70%);
  pointer-events:none;z-index:0;
}
.hero__inner{position:relative;z-index:1;display:grid;gap:clamp(20px,3vw,32px);max-width:880px}
.hero h1{font-size:clamp(2.2rem,4.4vw,3.6rem);letter-spacing:-.02em}
.hero h1 .accent{color:var(--c-acento)}
.hero .lead{font-size:clamp(1.05rem,1.4vw,1.25rem);max-width:62ch}
.hero__stats{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:.5rem;max-width:520px;margin-top:.5rem;
}
.hero__stat{
  background:var(--c-superficie);border:1px solid var(--c-borde);
  border-radius:var(--rad);padding:.85rem 1rem;text-align:center;
}
.hero__stat strong{display:block;font-size:1.6rem;color:var(--c-acento);line-height:1.1}
.hero__stat span{font-size:.82rem;color:var(--c-texto-secundario);text-transform:uppercase;letter-spacing:.05em}
.hero__cta{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:.5rem}

/* =============== Book cards (grid de libros) ============ */
.cluster-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(140px,1fr));
  gap:clamp(16px,2vw,28px);
}
@media (min-width:760px){
  .cluster-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}
}
.book-card{position:relative}
.book-card a{
  display:block;color:var(--c-texto);text-decoration:none;
  border-radius:var(--rad);transition:transform var(--t);
}
.book-card img{
  border-radius:var(--rad-sm);box-shadow:var(--sh);
  margin-bottom:.7rem;aspect-ratio:160/242;object-fit:cover;
  background:var(--c-superficie-2);
  transition:transform var(--t),box-shadow var(--t),filter var(--t-fast);
}
.book-card:hover img{
  transform:translateY(-6px) scale(1.03);
  box-shadow:var(--sh-lg);
  filter:saturate(1.1);
}
.book-card-title{
  font-size:.95rem;font-weight:600;line-height:1.3;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
  overflow:hidden;text-overflow:ellipsis;
}
.book-card:hover .book-card-title{color:var(--c-acento)}

/* =============== Página de libro ======================== */
.book-page-main{padding-block:clamp(20px,3vw,48px)}
.book-details-grid{
  display:grid;grid-template-columns:320px 1fr;gap:clamp(24px,4vw,56px);align-items:flex-start;
}
.book-cover-actions{position:sticky;top:88px}
.book-cover img{
  border-radius:var(--rad);box-shadow:var(--sh-lg);
  margin-bottom:1.25rem;aspect-ratio:300/453;object-fit:cover;
  background:var(--c-superficie-2);
  transition:transform var(--t);
}
.book-cover img:hover{transform:scale(1.02)}
.book-info h1{font-size:clamp(1.8rem,3vw,2.4rem);margin-bottom:.3rem}
.book-author{font-size:1.1rem;color:var(--c-texto-secundario);margin-bottom:1rem}
.book-author a{color:var(--c-texto-secundario);border-bottom:1px dashed transparent}
.book-author a:hover{color:var(--c-acento);border-bottom-color:var(--c-acento)}
.star-rating{
  display:inline-flex;align-items:center;gap:.4rem;
  font-size:1.1rem;color:var(--c-acento);margin-bottom:1.2rem;
}
.star-rating .rating-value{color:var(--c-texto);font-weight:600;font-size:.95rem}
.book-meta-data{margin-bottom:1.5rem}
.book-meta-data ul{
  list-style:none;display:grid;grid-template-columns:repeat(2,1fr);gap:.85rem 1.5rem;
  background:var(--c-superficie);padding:1.1rem 1.25rem;border-radius:var(--rad);border:1px solid var(--c-borde);
}
.book-meta-data li{font-size:.95rem}
.book-meta-data strong{
  display:block;color:var(--c-texto-secundario);font-weight:500;
  font-size:.8rem;text-transform:uppercase;letter-spacing:.04em;margin-bottom:.1rem;
}
.book-categories{grid-column:1 / -1}
.book-categories a{
  display:inline-flex;align-items:center;background:var(--c-superficie-2);
  padding:.3rem .8rem;border-radius:var(--rad-pill);font-size:.85rem;
  margin:.25rem .35rem .25rem 0;border:1px solid var(--c-borde);
  transition:background var(--t-fast),color var(--t-fast),border-color var(--t-fast);
}
.book-categories a:hover{background:var(--c-acento);color:var(--c-fondo);border-color:var(--c-acento)}
.book-description{
  background:var(--c-superficie);border:1px solid var(--c-borde);
  padding:clamp(20px,2.5vw,32px);border-radius:var(--rad);
}
.book-description__h{
  font-size:var(--fs-h3);margin-bottom:.85rem;
  color:var(--c-texto);font-weight:700;
}
.book-description p{margin-bottom:1em}
.book-description p:last-child{margin-bottom:0}
.book-howto{
  margin-top:clamp(20px,3vw,32px);padding:clamp(16px,2vw,24px);
  background:rgba(37,99,235,.06);border:1px solid rgba(37,99,235,.25);border-radius:var(--rad);
}
.book-howto h2{font-size:var(--fs-h3);margin-bottom:.6rem;color:var(--c-acento-claro)}
.book-howto ol{margin:.4rem 0 .9rem 1.2rem}
.book-howto li{margin:.3rem 0}
.book-howto p{margin:0;color:var(--c-texto-secundario)}
.book-howto a{font-weight:600}
.book-cluster{margin-top:clamp(32px,5vw,56px);padding-top:clamp(28px,4vw,48px);border-top:1px solid var(--c-borde)}
.book-cluster h2{margin-bottom:clamp(16px,2vw,24px)}

/* =============== Breadcrumbs ============================ */
.breadcrumbs{margin:0 0 1.25rem}
.breadcrumbs ol{
  list-style:none;display:flex;flex-wrap:wrap;gap:.4rem;
  color:var(--c-texto-secundario);font-size:.9rem;
}
.breadcrumbs li{display:inline-flex;align-items:center}
.breadcrumbs li+li::before{content:"›";margin:0 .35rem;color:var(--c-texto-tenue)}
.breadcrumbs a{color:var(--c-texto-secundario)}
.breadcrumbs a:hover{color:var(--c-acento)}
.breadcrumbs [aria-current="page"]{color:var(--c-texto)}

/* =============== Autores (listado) ====================== */
.author-tools{margin:1rem 0 1.25rem}
.author-search{
  width:100%;max-width:520px;padding:.85rem 1rem;
  border-radius:var(--rad);border:1px solid var(--c-borde);
  background:var(--c-superficie);color:var(--c-texto);
  transition:border-color var(--t-fast),box-shadow var(--t);
}
.author-search:focus{outline:0;border-color:var(--c-acento);box-shadow:0 0 0 3px rgba(37,99,235,.18)}
.alpha-nav{display:flex;flex-wrap:wrap;gap:.4rem;margin:1rem 0 1.5rem}
.alpha-nav .alpha-chip{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:2.6rem;height:2.6rem;padding:0 .7rem;
  border-radius:var(--rad-pill);border:1px solid var(--c-borde);
  background:var(--c-superficie);color:var(--c-texto);font-weight:700;
  transition:background var(--t-fast),color var(--t-fast),border-color var(--t-fast),transform var(--t-fast);
}
.alpha-nav .alpha-chip:hover{background:var(--c-acento);color:var(--c-fondo);border-color:var(--c-acento);transform:translateY(-2px)}
.author-letter{font-size:1.6rem;margin:1.5rem 0 .75rem;padding-bottom:.4rem;border-bottom:1px solid var(--c-borde)}
.author-list{
  columns:4 220px;column-gap:1.5rem;
  list-style:none;margin:0 0 1.5rem;padding:0;
}
.author-item{break-inside:avoid;margin-bottom:.25rem}
.author-item a{
  display:inline-block;padding:.25rem .55rem;border-radius:var(--rad-sm);
  color:var(--c-texto);border:1px solid transparent;
  transition:background var(--t-fast),border-color var(--t-fast);
}
.author-item a:hover{background:rgba(37,99,235,.1);border-color:var(--c-acento);color:var(--c-acento)}

/* =============== Categorías ============================= */
.cat-grid{display:grid;gap:1rem;grid-template-columns:repeat(2,minmax(0,1fr))}
@media (min-width:760px){.cat-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (min-width:1000px){.cat-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
.cat-card{display:block;text-decoration:none;color:var(--c-texto)}
.cat-card-figure{
  position:relative;aspect-ratio:5/4;border-radius:var(--rad);
  overflow:hidden;background:var(--c-superficie);
  border:1px solid var(--c-borde);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t-fast);
  display:flex;align-items:flex-end;padding:1rem;
}
.cat-card-figure img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  opacity:.45;transition:opacity var(--t-fast),transform var(--t-slow);
}
.cat-card-figure::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,10,18,.1) 0%,rgba(7,10,18,.85) 100%);
}
.cat-card-figure figcaption{
  position:relative;z-index:1;font-weight:800;font-size:1.1rem;
  color:var(--c-texto);text-shadow:0 1px 4px rgba(0,0,0,.6);
}
.cat-card:hover .cat-card-figure{transform:translateY(-3px);border-color:var(--c-acento);box-shadow:var(--sh)}
.cat-card:hover .cat-card-figure img{opacity:.55;transform:scale(1.06)}

.subcat-block{margin:1rem 0 2rem}
.subcat-block h2{font-size:1rem;color:var(--c-texto-secundario);text-transform:uppercase;letter-spacing:.06em;margin-bottom:.7rem}
.subcat-list{display:flex;flex-wrap:wrap;gap:.5rem}
.subcat-list a{
  display:inline-block;background:var(--c-superficie);border:1px solid var(--c-borde);
  color:var(--c-texto);padding:.4rem .85rem;border-radius:var(--rad-pill);font-size:.92rem;
  transition:background var(--t-fast),color var(--t-fast),border-color var(--t-fast),transform var(--t-fast);
}
.subcat-list a:hover{background:var(--c-acento);color:var(--c-fondo);border-color:var(--c-acento);transform:translateY(-2px)}

/* =============== Texto enriquecido ====================== */
.rt p{margin:.2rem 0 1.05rem;line-height:1.75}
.rt h2{font-size:clamp(1.5rem,2.4vw,1.9rem);margin:1.6rem 0 .65rem;line-height:1.25}
.rt h3{font-size:clamp(1.15rem,1.8vw,1.3rem);margin:1.2rem 0 .45rem;line-height:1.35}
.rt ul,.rt ol{margin:.4rem 0 1.05rem 1.4rem}
.rt li{margin:.25rem 0}
.rt strong{color:#ffffff}
.rt a{font-weight:600;border-bottom:1px solid rgba(37,99,235,.4)}
.rt a:hover{border-bottom-color:var(--c-acento)}

/* Tablas en contenido rico */
.rt table{
  width:100%;border-collapse:collapse;margin:1rem 0 1.5rem;
  background:var(--c-superficie);border:1px solid var(--c-borde);
  border-radius:var(--rad);overflow:hidden;
}
.rt th,.rt td{
  text-align:left;padding:.7rem .9rem;
  border-bottom:1px solid var(--c-borde);vertical-align:top;
}
.rt thead th{
  background:var(--c-superficie-2);color:var(--c-texto);
  font-weight:700;font-size:.88rem;text-transform:uppercase;letter-spacing:.04em;
  border-bottom:1px solid var(--c-borde-fuerte);
}
.rt tr:last-child td{border-bottom:0}
.table-compare .row-featured{
  background:linear-gradient(90deg,rgba(37,99,235,.12),rgba(37,99,235,0));
  border-left:3px solid var(--c-acento);
}
.table-compare .row-featured .star{color:var(--c-acento);margin-left:.25rem}

/* FAQ */
.faq-block details{
  border:1px solid var(--c-borde);background:var(--c-superficie);
  border-radius:var(--rad);padding:1rem 1.15rem;margin:.65rem 0;
  transition:border-color var(--t-fast),background var(--t-fast);
}
.faq-block details[open]{border-color:var(--c-acento)}
.faq-block summary{
  cursor:pointer;list-style:none;font-weight:700;font-size:1.02rem;
  display:flex;align-items:center;gap:.6rem;
}
.faq-block summary::-webkit-details-marker{display:none}
.faq-block summary::after{
  content:"+";margin-left:auto;color:var(--c-acento);font-size:1.4rem;
  transition:transform var(--t),color var(--t-fast);font-weight:400;line-height:1;
}
.faq-block details[open] summary::after{transform:rotate(45deg)}
.faq-block p{margin-top:.6rem;color:var(--c-texto)}
.faq-grid{display:grid;grid-template-columns:1fr;gap:.75rem}
@media (min-width:900px){.faq-grid{grid-template-columns:1fr 1fr}}

/* Listas SEO */
.seo-list{margin:.5rem 0 1rem 1.3rem}
.seo-list li{margin:.3rem 0}

/* =============== Paginación ============================= */
.pagination{
  display:flex;flex-wrap:wrap;gap:.5rem;align-items:center;justify-content:center;
  margin:2rem 0 2.5rem;
}
.pagination a,.pagination .page-ellipsis,.pagination .current{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:2.5rem;height:2.5rem;padding:0 .85rem;
  border-radius:var(--rad-pill);border:1px solid var(--c-borde);
  background:var(--c-superficie);color:var(--c-texto);
  font-weight:600;font-size:.95rem;line-height:1;text-decoration:none;
  transition:background var(--t-fast),border-color var(--t-fast),color var(--t-fast),transform var(--t-fast);
}
.pagination a:hover{background:var(--c-acento);border-color:var(--c-acento);color:var(--c-fondo);transform:translateY(-2px)}
.pagination .current{background:var(--c-acento);border-color:var(--c-acento);color:var(--c-fondo);pointer-events:none}
.pagination .page-ellipsis{border:0;background:transparent;color:var(--c-texto-secundario);min-width:auto;padding:0 .25rem}
.pagination .page-prev::before{content:"‹";margin-right:.4rem}
.pagination .page-next::after{content:"›";margin-left:.4rem}

/* =============== Footer ================================= */
.main-footer{
  background:var(--c-superficie);border-top:1px solid var(--c-borde);
  padding:clamp(32px,5vw,56px) 0 clamp(20px,3vw,28px);margin-top:clamp(40px,6vw,80px);
}
.main-footer__inner{display:grid;gap:clamp(24px,4vw,40px);grid-template-columns:1fr}
@media (min-width:820px){.main-footer__inner{grid-template-columns:1.4fr 1fr 1fr;align-items:start}}
.main-footer__brand{max-width:380px}
.main-footer__logo{display:inline-block;margin-bottom:1rem;line-height:0}
.main-footer__logo img{width:44px;height:44px}
.main-footer__claim{color:var(--c-texto-secundario);font-size:.95rem}
.main-footer__claim strong{color:var(--c-texto)}
.main-footer__cols{display:contents}
.main-footer__cols h2{
  font-size:.85rem;text-transform:uppercase;letter-spacing:.08em;
  color:var(--c-texto-secundario);font-weight:700;margin-bottom:.85rem;
}
.main-footer__cols ul{list-style:none;display:grid;gap:.4rem}
.main-footer__cols a{color:var(--c-texto)}
.main-footer__cols a:hover{color:var(--c-acento)}
.main-footer__legal{
  grid-column:1 / -1;padding-top:clamp(20px,3vw,28px);margin-top:.5rem;
  border-top:1px solid var(--c-borde);
  color:var(--c-texto-tenue);font-size:.85rem;display:grid;gap:.4rem;
}
.main-footer__disclaimer{max-width:65ch}

/* =============== Buscador (resultados) ================== */
.search-page{padding:clamp(24px,4vw,48px) 0}
.search-results{display:grid;gap:.75rem;margin-top:1.5rem}
.search-result{
  display:flex;gap:.85rem;align-items:center;padding:.8rem 1rem;
  background:var(--c-superficie);border:1px solid var(--c-borde);border-radius:var(--rad);
  transition:border-color var(--t-fast),transform var(--t-fast);
}
.search-result:hover{border-color:var(--c-acento);transform:translateY(-1px)}
.search-result__cover{width:48px;height:72px;flex:none;border-radius:4px;object-fit:cover}
.search-result__title{font-weight:600;color:var(--c-texto);line-height:1.3}
.search-result__author{font-size:.85rem;color:var(--c-texto-secundario)}
.search-empty{color:var(--c-texto-secundario);padding:2rem 0}

/* =============== Autor premium ========================== */
.autor-datos{
  background:var(--c-superficie);border:1px solid var(--c-borde);
  border-radius:var(--rad);padding:clamp(16px,2vw,24px);
  margin:1rem 0 1.5rem;
}
.autor-datos__grid{
  display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));
  gap:1rem 1.5rem;margin:0;
}
.autor-datos__grid > div{display:flex;flex-direction:column}
.autor-datos dt{
  font-size:.78rem;text-transform:uppercase;letter-spacing:.06em;
  color:var(--c-texto-secundario);font-weight:600;margin-bottom:.15rem;
}
.autor-datos dd{margin:0;color:var(--c-texto);font-weight:500}

.autor-sagas{display:grid;gap:1rem}
@media (min-width:760px){.autor-sagas{grid-template-columns:repeat(2,minmax(0,1fr))}}
.autor-saga{
  background:var(--c-superficie);border:1px solid var(--c-borde);
  border-radius:var(--rad);padding:clamp(16px,2vw,22px);
  transition:border-color var(--t-fast),transform var(--t-fast);
}
.autor-saga:hover{border-color:var(--c-acento);transform:translateY(-2px)}
.autor-saga h3{
  font-size:1.15rem;margin-bottom:.5rem;color:var(--c-acento-claro);
}
.autor-saga__desc{color:var(--c-texto-secundario);font-size:.95rem;margin-bottom:.65rem}
.autor-saga__libros{
  list-style:decimal;padding-left:1.2rem;color:var(--c-texto);font-size:.95rem;
}
.autor-saga__libros li{margin:.25rem 0}
.autor-saga__libros a{font-weight:500}

/* =============== Enlaces oficiales (hubs) =============== */
.enlaces-oficiales{margin:1rem 0 2rem}
.enlaces-oficiales h2{margin-bottom:.85rem}
.enlaces-oficiales__list{
  list-style:none;display:grid;gap:.65rem;
  grid-template-columns:repeat(auto-fill,minmax(280px,1fr));margin:0;
}
.enlaces-oficiales__list li{
  background:var(--c-superficie);border:1px solid var(--c-borde);
  border-radius:var(--rad);padding:.9rem 1rem;
  transition:border-color var(--t-fast),transform var(--t-fast);
}
.enlaces-oficiales__list li:hover{border-color:var(--c-acento);transform:translateY(-2px)}
.enlaces-oficiales__list a{display:inline-block;color:var(--c-texto)}
.enlaces-oficiales__list a:hover{color:var(--c-acento)}
.enlaces-oficiales__desc{color:var(--c-texto-secundario);font-size:.9rem;display:block;margin-top:.2rem}

/* =============== Microinteracciones (reveal) ============ */
html.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s cubic-bezier(.2,.7,.2,1)}
html.js .reveal.is-visible{opacity:1;transform:translateY(0)}
html.js .reveal-stagger > *{opacity:0;transform:translateY(14px);transition:opacity .55s ease,transform .55s cubic-bezier(.2,.7,.2,1)}
html.js .reveal-stagger.is-visible > *{opacity:1;transform:translateY(0)}
.reveal-stagger.is-visible > *:nth-child(1){transition-delay:.02s}
.reveal-stagger.is-visible > *:nth-child(2){transition-delay:.06s}
.reveal-stagger.is-visible > *:nth-child(3){transition-delay:.1s}
.reveal-stagger.is-visible > *:nth-child(4){transition-delay:.14s}
.reveal-stagger.is-visible > *:nth-child(5){transition-delay:.18s}
.reveal-stagger.is-visible > *:nth-child(6){transition-delay:.22s}
.reveal-stagger.is-visible > *:nth-child(n+7){transition-delay:.26s}

/* =============== Responsive ============================= */
@media (max-width:960px){
  .book-details-grid{grid-template-columns:1fr;gap:2rem}
  .book-cover-actions{
    position:static;display:grid;grid-template-columns:240px 1fr;gap:1.5rem;align-items:flex-start;
  }
  .book-cover img{margin-bottom:0}
}
@media (max-width:820px){
  .main-header__inner{flex-wrap:wrap}
  .menu-toggle{display:block;order:3}
  .main-nav{
    order:4;flex-basis:100%;flex-direction:column;align-items:stretch;gap:1rem;
    max-height:0;overflow:hidden;transition:max-height var(--t-slow),padding var(--t);
    padding-top:0;
  }
  .main-nav.is-open{max-height:600px;padding-top:1rem;padding-bottom:.5rem}
  .main-nav ul{flex-direction:column;align-items:stretch;gap:.25rem}
  .main-nav ul a{padding:.7rem 1rem;border-radius:var(--rad)}
  .header-search{min-width:0;width:100%}
  .author-list{columns:2 180px}
}
@media (max-width:600px){
  .hero__stats{grid-template-columns:repeat(3,minmax(0,1fr));gap:.35rem}
  .hero__stat{padding:.65rem .35rem}
  .hero__stat strong{font-size:1.3rem}
  .hero__stat span{font-size:.7rem}
  .book-cover-actions{grid-template-columns:1fr}
  .book-cover{max-width:240px;margin:0 auto}
  .book-meta-data ul{grid-template-columns:1fr}
  .cluster-grid{grid-template-columns:repeat(auto-fill,minmax(125px,1fr));gap:1rem}
  .author-list{columns:1}
}

/* =============== Reduce motion ========================== */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;animation-iteration-count:1 !important;
    transition-duration:.001ms !important;scroll-behavior:auto !important;
  }
  .reveal,.reveal-stagger > *{opacity:1 !important;transform:none !important}
}

/* =============== Print ================================== */
@media print{
  .main-header,.main-footer,.botones-descarga,.book-cluster,.breadcrumbs{display:none !important}
  body{background:#fff;color:#000}
  .book-description{border:1px solid #ccc;background:#fff}
}

/* =============== Rendimiento (content-visibility) ======= */
/* Evita renderizar secciones siempre bajo el pliegue hasta que se acercan
   al viewport. Gran ahorro en páginas largas (índice A-Z de autores de ~1,5 MB,
   FAQs, cluster de libros relacionados). No afecta al LCP (esas secciones no
   están en pantalla al cargar). */
.author-group{content-visibility:auto;contain-intrinsic-size:auto 1200px}
.book-cluster{content-visibility:auto;contain-intrinsic-size:auto 520px}
.faq-block{content-visibility:auto;contain-intrinsic-size:auto 480px}

/* =========================================================
   IDENTIDAD EbooksYa — capa "tech, descarga instantánea (ya)"
   Acento eléctrico (cobalto + cian), alto contraste, formas
   decididas y un microacento de velocidad. Va al final para
   ganar en cascada sin reescribir la base.
   ========================================================= */

/* Header: fondo coherente con el nuevo --c-fondo */
.main-header{background:rgba(7,10,18,.88)}

/* Barra eléctrica antes de cada título de sección → look "tech" */
.section-title h2{position:relative;padding-left:.9rem}
.section-title h2::before{
  content:"";position:absolute;left:0;top:.14em;bottom:.14em;
  width:4px;border-radius:2px;
  background:linear-gradient(180deg,var(--c-secundario),var(--c-acento));
}

/* Hero: halo eléctrico más presente + acento con subrayado de marca */
.hero::before{background:radial-gradient(closest-side,rgba(37,99,235,.22),transparent 70%)}
.hero h1 .accent{
  color:var(--c-acento);position:relative;
  text-shadow:0 0 28px rgba(37,99,235,.25);
}
.hero h1 .accent::after{
  content:"";position:absolute;left:0;right:0;bottom:-.08em;height:.12em;
  border-radius:2px;background:linear-gradient(90deg,var(--c-acento),transparent);
}
.hero__stat{transition:border-color var(--t-fast),transform var(--t-fast),background var(--t-fast)}
.hero__stat:hover{border-color:var(--c-acento);transform:translateY(-2px)}

/* Kicker del hero: píldora "sin registro / directo" */
.hero__kicker{
  display:inline-flex;align-items:center;gap:.5rem;width:max-content;
  padding:.4rem .85rem;border-radius:var(--rad-pill);
  background:var(--tint-acento);border:1px solid var(--tint-acento-fuerte);
  color:var(--c-acento-claro);font-weight:700;font-size:.82rem;
  letter-spacing:.04em;text-transform:uppercase;
}
.hero__kicker::before{
  content:"";width:.5rem;height:.5rem;border-radius:50%;
  background:var(--c-acento);box-shadow:0 0 0 4px rgba(37,99,235,.22);
}

/* Botones de descarga: glow coral al pasar (refuerza la conversión) */
.btn--epub:hover,.btn--pdf:hover,.btn--mobi:hover{box-shadow:var(--glow)}

/* Book cards: hover decidido con tinte coral */
.book-card a{transition:transform var(--t)}
.book-card:hover img{box-shadow:var(--sh-lg),0 0 0 2px rgba(37,99,235,.55)}

/* Footer: el logo recupera un poco de presencia de marca */
.main-footer__logo:hover img{transform:rotate(-3deg) scale(1.05);transition:transform var(--t)}

/* Selección de texto con la marca */
::selection{background:rgba(37,99,235,.28);color:#fff}

/* =========================================================
   HOME — hero "buscador protagonista" (layout divergente)
   El buscador es el héroe: encuentra tu libro "ya".
   ========================================================= */
.hero--search{padding-top:clamp(40px,8vw,84px);padding-bottom:clamp(32px,5vw,60px)}
.hero--search .hero__inner{
  max-width:780px;width:100%;min-width:0;margin:0 auto;text-align:center;align-items:center;
  gap:clamp(16px,2.4vw,24px);
}
.hero--search .hero__inner > *{min-width:0;max-width:100%}
.hero--search .hero__kicker{margin:0 auto}
.hero--search h1{font-size:clamp(2.1rem,5vw,3.6rem);letter-spacing:-.02em}
.hero--search .lead{margin:0 auto;max-width:54ch}

/* Buscador protagonista */
.hero-search{
  display:flex;align-items:center;gap:.4rem;
  width:100%;max-width:660px;margin:.2rem auto 0;
  background:var(--c-superficie);border:1.5px solid var(--c-borde-fuerte);
  border-radius:var(--rad-pill);padding:.45rem .45rem .45rem 1.3rem;
  box-shadow:var(--sh-lg);
  transition:border-color var(--t-fast),box-shadow var(--t);
}
.hero-search:focus-within{border-color:var(--c-acento);box-shadow:var(--sh-lg),0 0 0 4px rgba(37,99,235,.18)}
.hero-search__icon{width:22px;height:22px;fill:var(--c-texto-secundario);flex:none}
.hero-search input{
  flex:1;min-width:0;background:transparent;border:0;outline:0;
  color:var(--c-texto);font-size:1.08rem;padding:.7rem .3rem;
}
.hero-search input::placeholder{color:var(--c-texto-tenue)}
.hero-search__btn{
  flex:none;background:var(--c-acento);color:var(--c-fondo);font-weight:800;
  font-size:1rem;padding:.85rem 1.5rem;border-radius:var(--rad-pill);
  box-shadow:var(--glow);
  transition:background var(--t-fast),transform var(--t-fast);
}
.hero-search__btn:hover{background:var(--c-acento-claro);transform:translateY(-1px)}
.hero-search__btn:active{transform:translateY(0)}

/* Chips de géneros (accesos rápidos) */
.hero__chips{display:flex;flex-wrap:wrap;gap:.5rem;justify-content:center;margin-top:.2rem}
.hero__chips a{
  padding:.6rem 1rem;border-radius:var(--rad-pill);
  background:var(--c-superficie);border:1px solid var(--c-borde);
  color:var(--c-texto);font-size:.92rem;font-weight:600;
  transition:background var(--t-fast),color var(--t-fast),border-color var(--t-fast),transform var(--t-fast);
}
.hero__chips a:hover{background:var(--c-acento);color:var(--c-fondo);border-color:var(--c-acento);transform:translateY(-2px)}
.hero__chips .hero__chips-more{background:transparent;border-color:transparent;color:var(--c-acento);font-weight:700}
.hero__chips .hero__chips-more:hover{background:transparent;color:var(--c-acento-claro);transform:none}

/* Barra fina de stats (sustituye las tarjetas del hero v3) */
.hero--search .hero__stats{
  display:flex;flex-wrap:wrap;gap:.3rem 1rem;justify-content:center;
  grid-template-columns:none;max-width:none;margin:.6rem auto 0;
  color:var(--c-texto-secundario);font-size:.92rem;
}
.hero--search .hero__stats span{
  display:inline-flex;align-items:baseline;gap:.35rem;
  background:none;border:0;padding:0;
}
.hero--search .hero__stats strong{display:inline;color:var(--c-texto);font-size:1rem;line-height:1}

@media (max-width:560px){
  .hero-search{padding-left:1rem}
  .hero-search__btn{padding:.85rem 1rem}
  .hero-search input{font-size:1rem}
}
@media (max-width:380px){
  .hero-search{padding-left:.8rem}
  .hero-search__btn{padding:.85rem .8rem}
}

/* =========================================================
   Book cards — badge "GRATIS" coral (refuerza directo/gratis)
   ========================================================= */
.book-card > a{position:relative}
.book-card > a::before{
  content:"GRATIS";position:absolute;z-index:2;top:.5rem;left:.5rem;
  background:var(--c-acento);color:var(--c-fondo);
  font-size:.6rem;font-weight:800;letter-spacing:.06em;text-transform:uppercase;
  padding:.18rem .42rem;border-radius:var(--rad-sm);box-shadow:var(--sh-sm);
  pointer-events:none;
}
@media (max-width:600px){
  .book-card > a::before{font-size:.5rem;padding:.12rem .3rem;top:.35rem;left:.35rem}
}

/* =========================================================
   HOME v4 — hero con imagen (2 columnas) + "cómo funciona"
   Estética tech: texto y buscador a la izquierda, mockup a la
   derecha. La imagen es el LCP en escritorio; carga eager.
   ========================================================= */
.hero--media{padding-top:clamp(36px,7vw,76px);padding-bottom:clamp(32px,5vw,60px)}
.hero--media .hero__inner{
  max-width:1180px;width:100%;margin:0 auto;text-align:left;align-items:start;
  display:grid;grid-template-columns:1fr;gap:clamp(24px,4vw,48px);
}
@media (min-width:920px){
  .hero--media .hero__inner{grid-template-columns:1.05fr .95fr;align-items:center}
}
.hero--media .hero__copy{display:grid;gap:clamp(16px,2.2vw,22px);min-width:0}
.hero--media .hero__kicker{margin:0}
.hero--media h1{font-size:clamp(2.1rem,4.6vw,3.5rem);letter-spacing:-.022em;margin:0}
.hero--media .lead{margin:0;max-width:52ch}

/* El buscador del hero, alineado a la izquierda en este layout */
.hero--media .hero-search{margin:.1rem 0 0;max-width:560px}
.hero--media .hero__chips{justify-content:flex-start;margin-top:0}
.hero--media .hero__stats{
  display:flex;flex-wrap:wrap;gap:.3rem 1.1rem;justify-content:flex-start;
  grid-template-columns:none;max-width:none;margin:.3rem 0 0;
  color:var(--c-texto-secundario);font-size:.92rem;
}
.hero--media .hero__stats span{display:inline-flex;align-items:baseline;gap:.35rem;background:none;border:0;padding:0}
.hero--media .hero__stats strong{display:inline;color:var(--c-texto);font-size:1rem;line-height:1}

/* Marco del mockup: tablet/móvil tech con halo eléctrico */
.hero__media{position:relative;min-width:0}
.hero__media-frame{
  position:relative;border-radius:var(--rad-lg);overflow:hidden;
  border:1px solid var(--c-borde-fuerte);
  box-shadow:var(--sh-lg),0 0 0 1px rgba(37,99,235,.18);
  background:var(--c-superficie);
}
.hero__media-frame img{
  width:100%;height:auto;display:block;aspect-ratio:3/2;object-fit:cover;
}
.hero__media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(135deg,rgba(37,99,235,.18),transparent 45%,rgba(6,182,212,.16));
  mix-blend-mode:screen;
}
.hero__media-glow{
  content:"";position:absolute;inset:auto -8% -14% -8%;height:60%;z-index:-1;
  border-radius:50%;filter:blur(48px);
  background:radial-gradient(closest-side,rgba(6,182,212,.30),transparent 72%);
  pointer-events:none;
}

/* =========================================================
   "Cómo funciona" — 3 pasos + imagen tech de descarga
   ========================================================= */
.steps-block{
  background:linear-gradient(180deg,var(--c-superficie),var(--c-fondo));
  border:1px solid var(--c-borde);border-radius:var(--rad-lg);
  padding:clamp(22px,3.4vw,40px);
  display:grid;gap:clamp(22px,3vw,40px);grid-template-columns:1fr;align-items:center;
}
@media (min-width:880px){.steps-block{grid-template-columns:1.15fr .85fr}}
.steps-block__head h2{margin-bottom:.5rem}
.steps{list-style:none;counter-reset:paso;display:grid;gap:.9rem;margin:1.1rem 0 0}
.steps li{
  counter-increment:paso;position:relative;
  background:var(--c-superficie-2);border:1px solid var(--c-borde);
  border-radius:var(--rad);padding:1rem 1.1rem 1rem 3.4rem;
  transition:border-color var(--t-fast),transform var(--t-fast);
}
.steps li::before{
  content:counter(paso);position:absolute;left:.85rem;top:.95rem;
  width:1.9rem;height:1.9rem;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:.95rem;color:#fff;
  background:linear-gradient(135deg,var(--c-acento),var(--c-secundario));
  box-shadow:0 0 0 4px rgba(37,99,235,.16);
}
.steps li:hover{border-color:var(--c-acento);transform:translateX(3px)}
.steps li strong{color:var(--c-texto);display:block;margin-bottom:.15rem}
.steps li span{color:var(--c-texto-secundario);font-size:.95rem}
.steps-block__media{position:relative;min-width:0}
.steps-block__media img{
  width:100%;height:auto;border-radius:var(--rad);
  border:1px solid var(--c-borde-fuerte);
  box-shadow:var(--sh-lg),0 0 0 1px rgba(6,182,212,.20);
}
@media (max-width:879px){.steps-block__media{order:-1;max-width:520px;margin:0 auto}}