/* =========================================================
   /estilos/estilo.css — Tus Libros Gratis
   Identidad "Sobremesa": club de lectura cálido y hogareño.
   Crema/marfil + terracota/ámbar, titulares en serif suave.
   ========================================================= */

/* =============== Tokens ================================= */
:root{
  /* Paleta — "Sobremesa": luz cálida de salón, marfil y terracota */
  --c-fondo:#FCF7EF;          /* marfil cálido, casi crema */
  --c-fondo-rgb:252,247,239;
  --c-superficie:#FFFDF9;     /* tarjetas: marfil más limpio */
  --c-superficie-2:#F4E9D8;   /* relleno ámbar muy suave */
  --c-borde:#EADDCA;
  --c-borde-fuerte:#DAC8AC;
  --c-texto:#33291F;          /* castaño tostado (12.6:1 sobre fondo) */
  --c-texto-secundario:#6A5B49;/* 6.1:1 sobre fondo */
  --c-texto-tenue:#7C6C57;
  --c-acento:#C2683F;         /* terracota ámbar (brief): AA como texto y relleno */
  --c-acento-rgb:194,104,63;
  --c-acento-claro:#D27E52;   /* terracota cálido — decorativo (lavados rgba) */
  --c-acento-oscuro:#9D4F2C;  /* hover / activo */
  --c-secundario:#A87C3C;     /* ámbar miel (botón secundario, detalles) */
  --c-secundario-rgb:168,124,60;
  --c-secundario-claro:#8C6630;
  --c-error:#C0392B;
  --c-ok:#3C7D55;

  /* Tipografía — serif cálida para titulares (sello de club de lectura) */
  --ff:'Segoe UI',system-ui,-apple-system,'Helvetica Neue',Helvetica,Arial,'Liberation Sans',sans-serif;
  --ff-titulo:'Iowan Old Style','Palatino Linotype',Palatino,'Book Antiqua',Georgia,'Times New Roman',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:1.18;
  --lh:1.68;

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

  /* Radios y sombras */
  --rad-sm:8px;
  --rad:12px;
  --rad-lg:18px;
  --rad-pill:999px;
  --sh-sm:0 1px 2px rgba(82,54,30,.10);
  --sh:0 6px 18px rgba(82,54,30,.12);
  --sh-lg:0 16px 38px rgba(82,54,30,.16);

  /* Velocidades */
  --t-fast:.15s ease;
  --t:.3s ease-out;
  --t-slow:.55s ease;
}

/* =============== 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:#fff;
  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;
}

/* =============== 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{font-family:var(--ff-titulo);line-height:var(--lh-tight);font-weight:700;letter-spacing:-.005em}
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(var(--c-fondo-rgb),.82);
  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;gap:.6rem;line-height:0}
.logo img{width:48px;height:48px;transition:transform var(--t)}
.logo:hover img{transform:rotate(-3deg) scale(1.04)}
.logo__word{font-weight:800;font-size:1.18rem;letter-spacing:-.015em;color:var(--c-texto);line-height:1;white-space:nowrap}
.logo__word b{color:var(--c-acento);font-weight:800}
@media (max-width:520px){.logo__word{display:none}}

.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(var(--c-acento-rgb),.2);
}
.header-search__icon{
  position:absolute;left:.7rem;top:50%;transform:translateY(-50%);
  width:18px;height:18px;fill:var(--c-texto-secundario);color: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:#fff;
  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:#fff}
.btn--epub:hover,.btn--pdf:hover,.btn--mobi:hover{background:var(--c-acento-oscuro)}
.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:#fff;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(var(--c-acento-rgb),.16),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(var(--c-secundario-rgb),.22),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}
.hero__eyebrow{
  font-family:var(--ff-titulo);font-style:italic;font-size:1.05rem;
  color:var(--c-acento);margin:0;
}

/* Hero editorial con imagen lifestyle */
.hero--lifestyle .hero__inner{max-width:none}
.hero__grid{display:grid;gap:clamp(24px,4vw,48px);align-items:center;grid-template-columns:1fr}
@media (min-width:900px){
  .hero__grid{grid-template-columns:1.15fr .85fr}
  .hero--lifestyle .hero h1{font-size:clamp(2.2rem,3.8vw,3.3rem)}
}
.hero__media{
  position:relative;margin:0;border-radius:var(--rad-lg);overflow:hidden;
  border:1px solid var(--c-borde-fuerte);box-shadow:var(--sh-lg);
  transform:rotate(-1deg);
}
.hero__media img{width:100%;height:auto;display:block;aspect-ratio:3/2;object-fit:cover}
.hero__media figcaption{
  position:absolute;left:0;right:0;bottom:0;
  padding:1.4rem .9rem .7rem;font-size:.85rem;color:#fff;font-style:italic;
  background:linear-gradient(to top,rgba(40,28,18,.78),transparent);
}

/* Figuras dentro del texto largo (.rt) */
.rt-figure{
  margin:1.8rem 0;border-radius:var(--rad);overflow:hidden;
  border:1px solid var(--c-borde);box-shadow:var(--sh);max-width:560px;
}
.rt-figure img{width:100%;height:auto;display:block;aspect-ratio:3/2;object-fit:cover}
.rt-figure figcaption{
  padding:.7rem 1rem;font-size:.9rem;font-style:italic;
  color:var(--c-texto-secundario);background:var(--c-superficie-2);
}
@media (min-width:760px){
  .rt-figure{float:right;margin:.4rem 0 1.2rem 2rem;max-width:46%}
}

/* =============== 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);background:var(--c-superficie-2);
  margin-bottom:.7rem;aspect-ratio:160/242;object-fit:cover;
  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);background:var(--c-superficie-2);
  margin-bottom:1.25rem;aspect-ratio:300/453;object-fit:cover;
  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(var(--c-acento-rgb),.07);border:1px solid rgba(var(--c-acento-rgb),.22);border-radius:var(--rad);
}
.book-howto h2{font-size:var(--fs-h3);margin-bottom:.6rem;color:var(--c-acento-oscuro)}
.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(var(--c-acento-rgb),.2)}
.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:2.3rem;height:2.3rem;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(var(--c-acento-rgb),.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(43,38,34,.15) 0%,rgba(43,38,34,.82) 100%);
}
.cat-card-figure figcaption{
  position:relative;z-index:1;font-weight:800;font-size:1.1rem;
  color:#fff;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:var(--c-texto)}
.rt a{font-weight:600;border-bottom:1px solid rgba(var(--c-acento-rgb),.45)}
.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(var(--c-acento-rgb),.12),rgba(var(--c-acento-rgb),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:720px){.main-footer__cols{grid-template-columns:repeat(3,1fr)}}
@media (min-width:1000px){.main-footer__inner{grid-template-columns:1.5fr 2fr;align-items:start}}
.main-footer__brand{max-width:420px}
.main-footer__logo{display:inline-flex;align-items:center;gap:.6rem;margin-bottom:1rem;line-height:1}
.main-footer__logo img{width:40px;height:40px}
.main-footer__name{font-family:var(--ff-titulo);font-size:1.2rem;color:var(--c-texto);font-weight:700}
.main-footer__name b{color:var(--c-acento);font-weight:700}
.main-footer__claim{color:var(--c-texto-secundario);font-size:.95rem;line-height:1.7}
.main-footer__claim strong{color:var(--c-texto)}
.main-footer__cols{display:grid;gap:clamp(20px,3vw,32px);grid-template-columns:1fr}
.main-footer__cols h2{
  font-family:var(--ff-titulo);font-size:1rem;letter-spacing:0;
  color:var(--c-acento-oscuro);font-weight:700;margin-bottom:.85rem;
}
.main-footer__cols ul{list-style:none;display:grid;gap:.5rem}
.main-footer__cols a{color:var(--c-texto-secundario)}
.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 dashed var(--c-borde-fuerte);
  color:var(--c-texto-tenue);font-size:.85rem;display:grid;gap:.55rem;
}
.main-footer__disclaimer{max-width:80ch}
.main-footer__disclaimer strong{color:var(--c-texto-secundario)}

/* =============== 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}