/* =============================================================
   BookAtMe! · hoja de estilos única
   1. Tokens · 2. Reset · 3. Utilidades · 4. Tipografía
   5. Componentes · 6. Secciones · 7. Efectos · 8. Responsive
   9. Reduced motion
   ============================================================= */

/* =============================================================
   1. Tokens
   ============================================================= */
:root {
  /* Tinta y papel — hueso frío, no crema. El neutro tira ligeramente al verde
     del acento para que la página lea como un conjunto y no como gris de serie. */
  --ink:        #15181A;
  --ink-soft:   #3B4340;
  --ink-mute:   #6A7370;
  --paper:      #F5F4F0;
  --paper-2:    #EAE9E2;
  --paper-3:    #DBDACF;
  --line:       #CFCFC3;
  --line-soft:  #E2E1D8;

  /* Acento: el verde de las encuadernaciones en tela. Latón solo para estrellas. */
  --accent:       #24503D;
  --accent-deep:  #17372A;
  --accent-tint:  #E6EEEA;
  --brass:      #A87C2E;
  --brass-tint: #F6EEDC;
  --sage:       #4F6B58;

  /* Semánticos — separados del acento */
  --good:       #2F6B4A;
  --bad:        #9B3B36;

  /* Superficies */
  --surface:    #FFFFFE;
  --surface-2:  #FAFAF6;
  --shadow-sm:  0 1px 2px rgba(20,22,28,.05), 0 2px 8px rgba(20,22,28,.04);
  --shadow-md:  0 2px 6px rgba(20,22,28,.06), 0 12px 32px rgba(20,22,28,.07);
  --shadow-lg:  0 4px 12px rgba(20,22,28,.08), 0 24px 64px rgba(20,22,28,.10);
  --shadow-book: 0 1px 1px rgba(20,22,28,.10), 0 10px 24px rgba(20,22,28,.16);

  /* Tipografía */
  --display: "Fraunces", "Iowan Old Style", Georgia, serif;
  --serif:   "Newsreader", Georgia, "Times New Roman", serif;
  --sans:    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Ritmo */
  --gutter: clamp(1.15rem, 4vw, 2.5rem);
  --maxw: 1240px;
  --maxw-read: 68ch;
  --radius: 14px;
  --radius-sm: 9px;

  /* Curvas */
  --ease-out:  cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in:   cubic-bezier(0.7, 0, 0.84, 0);
  --ease-soft: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* =============================================================
   2. Reset y base
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html {
  -webkit-text-size-adjust: 100%;
  tab-size: 2;
  overflow-x: clip;
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}
body {
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.62;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  overscroll-behavior-y: none;
  /* textura sutil de papel */
  background-image:
    radial-gradient(1200px 500px at 82% -8%, rgba(168,124,46,.07), transparent 62%),
    radial-gradient(900px 420px at 4% 4%, rgba(36,80,61,.06), transparent 60%);
  background-attachment: fixed;
}
img, svg, video { display: block; max-width: 100%; }
img { height: auto; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; }
a { color: inherit; text-decoration: none; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.06; letter-spacing: -0.018em; font-weight: 500; }
table { border-collapse: collapse; }
::selection { background: var(--accent); color: var(--paper); }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 5px; }

/* =============================================================
   3. Utilidades
   ============================================================= */
.wrap { width: min(100% - (var(--gutter) * 2), var(--maxw)); margin-inline: auto; }
.wrap-narrow { width: min(100% - (var(--gutter) * 2), 860px); margin-inline: auto; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: fixed; top: -100px; left: 1rem; z-index: 9999;
  padding: .65rem 1.1rem; background: var(--ink); color: var(--paper);
  border-radius: 8px; font-weight: 500;
}
.skip-link:focus { top: 1rem; }

.eyebrow {
  font-family: var(--sans);
  font-size: .715rem; font-weight: 600; letter-spacing: .16em; text-transform: uppercase;
  color: var(--accent); display: block; margin-bottom: .85rem;
}
.eyebrow-mute { color: var(--ink-mute); }
.section { padding-block: clamp(3.2rem, 8vw, 6rem); }
.section-head { margin-bottom: clamp(1.8rem, 4vw, 2.8rem); max-width: 62ch; }
.section-head p { color: var(--ink-soft); margin-top: .85rem; font-size: 1.03rem; }
.rule { height: 1px; background: var(--line); border: 0; margin-block: clamp(2.4rem, 6vw, 4rem); }

/* =============================================================
   4. Tipografía
   ============================================================= */
h1, .h1 { font-family: var(--display); font-size: clamp(2.15rem, 5.6vw, 4.15rem); font-variation-settings: "SOFT" 12, "WONK" 1, "opsz" 120; }
h2, .h2 { font-family: var(--display); font-size: clamp(1.7rem, 3.4vw, 2.7rem); font-variation-settings: "SOFT" 8, "opsz" 60; }
h3, .h3 { font-family: var(--display); font-size: clamp(1.2rem, 2vw, 1.5rem); }
h4      { font-family: var(--sans); font-size: 1rem; font-weight: 600; letter-spacing: -.01em; }

.lead { font-family: var(--serif); font-size: clamp(1.08rem, 1.7vw, 1.3rem); line-height: 1.62; color: var(--ink-soft); }
.prose { font-family: var(--serif); font-size: 1.115rem; line-height: 1.75; color: var(--ink-soft); max-width: var(--maxw-read); }
.prose p + p { margin-top: 1.15em; }
.prose strong { color: var(--ink); font-weight: 600; }
.prose em { font-style: italic; }
.prose a { color: var(--accent); text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }
.prose h2 { margin-top: 2.2em; margin-bottom: .5em; }
.prose h3 { margin-top: 1.8em; margin-bottom: .4em; }
.prose ul { margin: 1em 0 1em 1.15em; }
.prose li { margin-bottom: .4em; }

/* =============================================================
   5. Componentes
   ============================================================= */

/* --- Botones --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .55rem;
  padding: .78rem 1.35rem; border-radius: 999px;
  font-size: .93rem; font-weight: 550; letter-spacing: -.005em;
  border: 1px solid transparent; text-align: center;
  transition: background .34s var(--ease-out), color .34s var(--ease-out),
              border-color .34s var(--ease-out), transform .34s var(--ease-out),
              box-shadow .34s var(--ease-out);
}
.btn svg { width: 1.05em; height: 1.05em; flex: none; }
.btn-buy {
  background: var(--accent); color: #fff; box-shadow: 0 2px 10px rgba(36,80,61,.26);
}
.btn-buy:hover { background: var(--accent-deep); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(36,80,61,.34); }
.btn-buy-lg { padding: 1rem 1.9rem; font-size: 1rem; width: 100%; }
.btn-ghost { border-color: var(--line); color: var(--ink); background: var(--surface); }
.btn-ghost:hover { border-color: var(--ink); background: var(--ink); color: var(--paper); }
.btn-quiet { color: var(--ink-soft); padding-inline: .55rem; }
.btn-quiet:hover { color: var(--accent); }
.btn[aria-pressed="true"] { background: var(--ink); color: var(--paper); border-color: var(--ink); }

/* --- Cabecera --- */
.site-head {
  position: sticky; top: 0; z-index: 200;
  background: rgba(245,244,240,.86);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease-out), background .3s var(--ease-out);
}
@supports not (backdrop-filter: blur(4px)) { .site-head { background: var(--paper); } }
.site-head.is-stuck { border-bottom-color: var(--line); background: rgba(245,244,240,.95); }
.head-inner { display: flex; align-items: center; gap: 1.1rem; min-height: 68px; }

.brand { display: flex; align-items: baseline; gap: .5rem; margin-right: auto; }
.brand-mark {
  font-family: var(--display); font-size: 1.42rem; font-weight: 600; letter-spacing: -.03em;
  font-variation-settings: "SOFT" 14, "WONK" 1;
}
.brand-mark span { color: var(--accent); }

/* La marca: BookAtMe! El "At" va en verde porque ahi esta el juego de palabras
   (BookAtMe / look at me). El "!" se queda mas fino y algo separado, para que
   remate sin gritar. */
.brand-mark em {
  font-style: normal; font-weight: 400;
  color: var(--brass);
  margin-left: .04em;
}

.brand-tag {
  font-size: .66rem; letter-spacing: .15em; text-transform: uppercase;
  color: var(--ink-mute); font-weight: 550; display: none;
}

.nav-links { display: none; align-items: center; gap: .3rem; }
.nav-links a {
  padding: .5rem .72rem; border-radius: 8px; font-size: .9rem; font-weight: 500;
  color: var(--ink-soft); transition: color .25s var(--ease-out), background .25s var(--ease-out);
}
.nav-links a:hover { color: var(--ink); background: var(--paper-2); }
.nav-links a[aria-current="page"] { color: var(--accent); }
.nav-links a.nav-cta,
.nav-links a.nav-cta:hover {
  background: var(--ink); color: var(--paper); padding-inline: 1rem;
}
.nav-cta-count {
  display: none; min-width: 1.35em; padding: 0 .35em; border-radius: 999px;
  background: var(--brass); color: var(--ink); font-size: .72rem; font-weight: 700;
  line-height: 1.5em; text-align: center; margin-left: .1rem;
}
.nav-cta-count.is-on { display: inline-block; }

.nav-toggle {
  display: inline-flex; flex-direction: column; gap: 4px; padding: .6rem; border-radius: 9px;
  border: 1px solid var(--line); background: var(--surface);
}
.nav-toggle i { display: block; width: 18px; height: 1.5px; background: var(--ink); transition: transform .3s var(--ease-out), opacity .2s; }
.nav-toggle[aria-expanded="true"] i:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] i:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] i:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

.nav-drawer {
  display: none; border-top: 1px solid var(--line); background: var(--paper);
  padding: .8rem var(--gutter) 1.4rem;
}
.nav-drawer.is-open { display: block; }
.nav-drawer a {
  display: block; padding: .72rem .2rem; font-size: 1.02rem; font-weight: 500;
  border-bottom: 1px solid var(--line-soft);
}
.nav-drawer a:last-child { border-bottom: 0; }
.nav-drawer .drawer-label {
  font-size: .68rem; letter-spacing: .15em; text-transform: uppercase;
  color: var(--ink-mute); padding-top: 1rem; font-weight: 600;
}

/* --- Aviso de afiliados --- */
.aff-bar {
  background: var(--ink); color: rgba(245,244,240,.82);
  font-size: .75rem; letter-spacing: .01em; text-align: center;
  padding: .48rem var(--gutter);
}
.aff-bar a { color: var(--paper); text-decoration: underline; text-underline-offset: 2px; }
.aff-note {
  font-size: .78rem; color: var(--ink-mute); line-height: 1.55;
  border-left: 2px solid var(--brass); padding-left: .85rem; margin-top: 1rem;
}

/* --- Portada de libro (efecto lomo) --- */
.cover {
  position: relative; display: block; border-radius: 3px 6px 6px 3px;
  overflow: hidden; background: var(--paper-3);
  box-shadow: var(--shadow-book);
  transition: transform .5s var(--ease-out), box-shadow .5s var(--ease-out);
}
.cover img { width: 100%; aspect-ratio: 2 / 3; object-fit: cover; }
.cover::after {
  content: ""; position: absolute; inset: 0 auto 0 0; width: 9px;
  background: linear-gradient(90deg, rgba(0,0,0,.30), rgba(0,0,0,.06) 55%, rgba(255,255,255,.16));
  pointer-events: none;
}
.cover::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; z-index: 2;
  background: linear-gradient(107deg, rgba(255,255,255,0) 62%, rgba(255,255,255,.14) 78%, rgba(255,255,255,0) 92%);
  opacity: 0; transition: opacity .55s var(--ease-out);
}
a:hover > .cover, .book-card:hover .cover { transform: translateY(-5px) rotate(-.5deg); box-shadow: var(--shadow-lg); }
a:hover > .cover::before, .book-card:hover .cover::before { opacity: 1; }

/* --- Ficha resumida (card) --- */
.book-grid {
  display: grid; gap: clamp(1.4rem, 3vw, 2.2rem);
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
}
.book-card { display: flex; flex-direction: column; position: relative; }
.book-card .cover { margin-bottom: .95rem; }
.book-card h3 {
  font-size: 1.03rem; line-height: 1.28; font-family: var(--display);
  font-variation-settings: "SOFT" 6; margin-bottom: .2rem;
}
.book-card .author { font-size: .84rem; color: var(--ink-mute); margin-bottom: .5rem; }
.book-card .card-foot {
  margin-top: auto; padding-top: .6rem; display: flex; align-items: baseline;
  justify-content: space-between; gap: .6rem; flex-wrap: wrap;
}
.book-card .btn { margin-top: .7rem; }

.badge {
  display: inline-flex; align-items: center; gap: .3rem;
  font-size: .68rem; font-weight: 650; letter-spacing: .06em; text-transform: uppercase;
  padding: .26rem .55rem; border-radius: 5px;
}
.badge-cat { background: var(--paper-2); color: var(--ink-soft); }
.badge-off { background: var(--accent); color: #fff; }
.badge-top { background: var(--brass-tint); color: #6B5220; border: 1px solid rgba(181,134,60,.35); }
.card-badges { display: flex; flex-wrap: wrap; gap: .35rem; margin-bottom: .5rem; }

.stars { display: inline-flex; align-items: center; gap: .35rem; font-size: .84rem; color: var(--ink-soft); }
.stars-count { color: var(--ink-mute); font-size: .96em; }
/* cinco estrellas con relleno parcial exacto */
.stars-glyph {
  position: relative; display: inline-block; white-space: nowrap;
  color: var(--paper-3); font-size: .95em; line-height: 1;
}
.stars-glyph::before { content: "★★★★★"; letter-spacing: .05em; }
.stars-glyph b {
  position: absolute; inset: 0 auto 0 0; overflow: hidden;
  color: var(--brass); white-space: nowrap; font-weight: inherit;
}
.stars-glyph b::before { content: "★★★★★"; letter-spacing: .05em; }

.price { display: inline-flex; align-items: baseline; gap: .45rem; }
.price-now { font-size: 1.06rem; font-weight: 650; letter-spacing: -.02em; }
.price-was { font-size: .84rem; color: var(--ink-mute); text-decoration: line-through; }
.price-none { font-size: .9rem; color: var(--ink-mute); }
.price-date { display: block; font-size: .72rem; color: var(--ink-mute); margin-top: .3rem; }

/* --- Comparar (checkbox flotante) --- */
.cmp-add {
  display: inline-flex; align-items: center; gap: .4rem; margin-top: .55rem;
  font-size: .8rem; font-weight: 500; color: var(--ink-mute);
  padding: .3rem .1rem; transition: color .25s var(--ease-out);
}
.cmp-add:hover { color: var(--accent); }
.cmp-add .box {
  width: 15px; height: 15px; border: 1.5px solid var(--line); border-radius: 4px; flex: none;
  display: grid; place-items: center; transition: all .25s var(--ease-out);
}
.cmp-add[aria-pressed="true"] { color: var(--accent); font-weight: 600; }
.cmp-add[aria-pressed="true"] .box { background: var(--accent); border-color: var(--accent); }
.cmp-add[aria-pressed="true"] .box::after {
  content: ""; width: 4px; height: 8px; border: solid #fff; border-width: 0 1.7px 1.7px 0;
  transform: rotate(42deg) translateY(-1px);
}

/* --- Barra flotante del comparador --- */
.cmp-bar {
  position: fixed; left: 50%; bottom: 1rem; z-index: 180;
  transform: translate(-50%, 160%); opacity: 0;
  width: min(100% - 1.6rem, 620px);
  background: var(--ink); color: var(--paper);
  border-radius: 15px; padding: .75rem .8rem .75rem 1.1rem;
  display: flex; align-items: center; gap: .8rem;
  box-shadow: 0 12px 40px rgba(20,22,28,.30);
  transition: transform .45s var(--ease-out), opacity .35s var(--ease-out);
}
.cmp-bar.is-on { transform: translate(-50%, 0); opacity: 1; }
.cmp-bar-text { font-size: .88rem; line-height: 1.35; margin-right: auto; }
.cmp-bar-text b { font-weight: 650; }
.cmp-bar-text small { display: block; color: rgba(245,244,240,.6); font-size: .76rem; }
.cmp-bar .btn-buy { background: var(--brass); color: var(--ink); box-shadow: none; }
.cmp-bar .btn-buy:hover { background: #BE9040; }
.cmp-bar .btn-clear { color: rgba(245,244,240,.65); font-size: .82rem; padding: .4rem; }
.cmp-bar .btn-clear:hover { color: var(--paper); }

/* --- Tabla de características --- */
.spec-table { width: 100%; font-size: .92rem; }
.spec-table caption {
  text-align: left; font-family: var(--sans); font-size: .72rem; font-weight: 600;
  letter-spacing: .14em; text-transform: uppercase; color: var(--ink-mute);
  padding: 1.5rem 0 .6rem;
}
.spec-table th, .spec-table td { text-align: left; padding: .62rem .8rem; vertical-align: top; }
.spec-table tbody tr { border-bottom: 1px solid var(--line-soft); }
.spec-table tbody tr:hover { background: var(--surface-2); }
.spec-table th { font-weight: 500; color: var(--ink-mute); width: 42%; }
.spec-table td { font-weight: 500; font-variant-numeric: tabular-nums; }
.spec-table .nil { color: var(--line); }
.spec-wrap { overflow-x: auto; }

/* --- Radar --- */
.radar-panel {
  background: var(--surface); border: 1px solid var(--line-soft); border-radius: var(--radius);
  padding: clamp(1.1rem, 2.5vw, 1.7rem); box-shadow: var(--shadow-sm);
}
.radar-head { display: flex; align-items: baseline; justify-content: space-between; gap: .8rem; margin-bottom: .4rem; }
.radar-head h3 { font-size: 1.12rem; }
.radar-note { font-size: .76rem; color: var(--ink-mute); margin-bottom: 1rem; }
.radar-svg { width: 100%; height: auto; overflow: visible; }
.radar-axis { stroke: var(--line); stroke-width: 1; }
.radar-ring { fill: none; stroke: var(--line-soft); stroke-width: 1; }
.radar-label { font-family: var(--sans); font-size: 10.5px; font-weight: 550; fill: var(--ink-mute); }
.radar-label-val { font-family: var(--sans); font-size: 9.5px; font-weight: 700; fill: var(--ink); }
.radar-shape { stroke-width: 2; stroke-linejoin: round; }
.radar-dot { r: 2.6; }
.radar-legend { display: flex; flex-wrap: wrap; gap: .5rem 1.1rem; margin-top: 1rem; font-size: .82rem; }
.radar-legend span { display: inline-flex; align-items: center; gap: .42rem; }
.radar-legend i { width: 11px; height: 11px; border-radius: 3px; flex: none; }

.score-list { display: grid; gap: .55rem; margin-top: 1.1rem; }
.score-row { display: grid; grid-template-columns: 8.5rem 1fr 1.9rem; align-items: center; gap: .7rem; font-size: .84rem; }
.score-row .lbl { color: var(--ink-mute); }
.score-row .track { height: 5px; background: var(--paper-3); border-radius: 99px; overflow: hidden; }
.score-row .fill { height: 100%; background: var(--accent); border-radius: 99px; }
.score-row .num { text-align: right; font-weight: 650; font-variant-numeric: tabular-nums; }

/* --- Pros y contras --- */
.pc { display: grid; gap: 1rem; }
.pc-col { border-radius: var(--radius); padding: 1.15rem 1.25rem; border: 1px solid; }
.pc-pros { background: #EBF2ED; border-color: #CFE0D5; }
.pc-cons { background: #FBF1F0; border-color: #EDD9D7; }
.pc-col h3 { font-family: var(--sans); font-size: .74rem; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; display: flex; align-items: center; gap: .45rem; margin-bottom: .8rem; }
.pc-pros h3 { color: var(--good); }
.pc-cons h3 { color: var(--bad); }
.pc-col h3 svg, .pc-col li svg { width: 1.05em; height: 1.05em; flex: none; }
.pc-col ul { list-style: none; display: grid; gap: .5rem; }
.pc-col li { display: flex; gap: .55rem; font-size: .92rem; line-height: 1.5; }
.pc-pros li svg { color: var(--good); margin-top: .28em; }
.pc-cons li svg { color: var(--bad); margin-top: .28em; }

.ideal {
  margin-top: 1.2rem; padding: 1.05rem 1.25rem; border-radius: var(--radius);
  background: var(--brass-tint); border: 1px solid rgba(181,134,60,.3);
  font-family: var(--serif); font-size: 1.04rem; line-height: 1.6;
}
.ideal b { font-family: var(--sans); font-size: .72rem; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; color: #6B5220; display: block; margin-bottom: .35rem; }

/* --- Reseñas --- */
.reviews { display: grid; gap: .9rem; }
.review {
  background: var(--surface); border: 1px solid var(--line-soft);
  border-radius: var(--radius); padding: 1.05rem 1.2rem;
}
.review-head { display: flex; align-items: baseline; gap: .6rem; flex-wrap: wrap; margin-bottom: .45rem; }
.review-head .who { font-weight: 600; font-size: .92rem; }
.review-head .when { font-size: .78rem; color: var(--ink-mute); margin-left: auto; }
.review h4 { font-size: .95rem; margin-bottom: .3rem; }
.review p { font-family: var(--serif); font-size: 1rem; color: var(--ink-soft); line-height: 1.6; }
.review-meta { font-size: .74rem; color: var(--ink-mute); margin-top: .55rem; }
.reviews-summary {
  background: var(--paper-2); border-radius: var(--radius); padding: 1.15rem 1.3rem;
  font-family: var(--serif); font-size: 1.06rem; line-height: 1.65; color: var(--ink-soft);
  margin-bottom: 1.1rem;
}

/* --- Pie --- */
.site-foot {
  background: var(--ink); color: rgba(245,244,240,.72);
  padding-block: clamp(2.6rem, 6vw, 4rem) 2rem; margin-top: clamp(3rem, 8vw, 6rem);
}
.foot-grid { display: grid; gap: 2rem; grid-template-columns: 1fr; }
.site-foot h4 { color: var(--paper); font-size: .74rem; letter-spacing: .14em; text-transform: uppercase; margin-bottom: .9rem; font-weight: 600; }
.site-foot a { color: rgba(245,244,240,.72); font-size: .92rem; }
.site-foot a:hover { color: var(--paper); }
.site-foot ul { list-style: none; display: grid; gap: .5rem; }
.foot-brand .brand-mark { color: var(--paper); }
.foot-brand p { font-size: .9rem; margin-top: .7rem; max-width: 40ch; line-height: 1.6; }
.foot-legal {
  border-top: 1px solid rgba(245,244,240,.14); margin-top: 2.4rem; padding-top: 1.4rem;
  font-size: .8rem; line-height: 1.6; display: grid; gap: .7rem;
}

/* =============================================================
   6. Secciones
   ============================================================= */

/* --- Hero --- */
.hero { padding-block: clamp(2.6rem, 7vw, 5.2rem) clamp(2rem, 5vw, 3.4rem); position: relative; }
.hero-grid { display: grid; gap: clamp(2rem, 5vw, 3rem); align-items: center; }
.hero h1 { margin-bottom: 1.1rem; }
.hero h1 em { font-style: italic; color: var(--accent); font-variation-settings: "WONK" 1; }
.hero-lead { max-width: 46ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 1.7rem; }
.hero-facts {
  display: flex; flex-wrap: wrap; gap: 1.6rem; margin-top: 2rem;
  padding-top: 1.5rem; border-top: 1px solid var(--line);
}
.hero-fact strong { display: block; font-family: var(--display); font-size: 1.75rem; font-variation-settings: "SOFT" 8; line-height: 1; }
.hero-fact span { font-size: .78rem; color: var(--ink-mute); letter-spacing: .03em; }

/* estantería del hero */
.shelf { position: relative; }
.shelf-books { display: flex; align-items: flex-end; justify-content: center; gap: clamp(.5rem, 1.6vw, 1rem); }
.shelf-books a { flex: 1 1 0; max-width: 150px; transition: transform .55s var(--ease-out); }
.shelf-books a:nth-child(odd) { transform: translateY(-10px); }
.shelf-books a:hover { transform: translateY(-18px); }
.shelf-plank {
  height: 10px; margin-top: -2px; border-radius: 2px;
  background: linear-gradient(180deg, var(--paper-3), var(--line));
  box-shadow: 0 10px 26px rgba(20,22,28,.14);
}

/* --- Cómo elegimos (bloque confianza) --- */
.trust { background: var(--paper-2); border-block: 1px solid var(--line); }
.trust-grid { display: grid; gap: 1.6rem; }
.trust-item h3 { font-family: var(--sans); font-size: .98rem; font-weight: 600; margin-bottom: .45rem; display: flex; gap: .5rem; align-items: center; }
.trust-item h3 svg { width: 1.15em; height: 1.15em; flex: none; color: var(--accent); }
.trust-item p { font-size: .93rem; color: var(--ink-soft); line-height: 1.6; }

/* --- Tarjetas de categoría --- */
.cat-grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }
.cat-card {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 1.25rem 1.35rem;
  background: var(--surface); display: flex; flex-direction: column; min-height: 138px;
  transition: transform .35s var(--ease-out), box-shadow .35s var(--ease-out), border-color .35s var(--ease-out);
}
.cat-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--paper-3); }
.cat-card h3 { font-size: 1.22rem; margin-bottom: .3rem; }
.cat-card p { font-size: .85rem; color: var(--ink-mute); }
.cat-card .n { margin-top: auto; padding-top: .8rem; font-size: .78rem; color: var(--accent); font-weight: 600; }

/* --- Ficha de libro --- */
.book-hero { padding-block: clamp(1.8rem, 4vw, 3rem) 0; }
.crumbs { font-size: .8rem; color: var(--ink-mute); margin-bottom: 1.4rem; display: flex; flex-wrap: wrap; gap: .4rem; }
.crumbs a:hover { color: var(--accent); }
.book-hero-grid { display: grid; gap: clamp(1.6rem, 4vw, 3rem); align-items: start; }

.gallery-main {
  border-radius: 4px 8px 8px 4px; overflow: hidden; background: var(--paper-2);
  box-shadow: var(--shadow-book); position: relative;
}
.gallery-main img { width: 100%; aspect-ratio: 2 / 3; object-fit: contain; background: var(--surface); }
.gallery-thumbs { display: flex; gap: .55rem; margin-top: .7rem; flex-wrap: wrap; }
.gallery-thumbs button {
  width: 58px; border-radius: 4px; overflow: hidden; border: 1.5px solid var(--line-soft);
  background: var(--surface); padding: 0; transition: border-color .28s var(--ease-out);
}
.gallery-thumbs button img { aspect-ratio: 2 / 3; object-fit: cover; width: 100%; }
.gallery-thumbs button[aria-current="true"] { border-color: var(--accent); }
.gallery-single { font-size: .74rem; color: var(--ink-mute); margin-top: .7rem; }

.book-title { margin-bottom: .35rem; }
.book-sub { font-family: var(--serif); font-size: 1.05rem; color: var(--ink-mute); font-style: italic; margin-bottom: .7rem; }
.book-author { font-size: 1rem; color: var(--ink-soft); margin-bottom: 1rem; }
.book-author b { font-weight: 600; color: var(--ink); }
.book-meta-row { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem 1.1rem; margin-bottom: 1.2rem; }
.buybox {
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface);
  padding: 1.15rem 1.25rem; box-shadow: var(--shadow-sm);
}
.buybox .price-now { font-size: 1.65rem; }
.buybox .btn { margin-top: .9rem; }
.buybox-facts { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: .9rem; }
.chip {
  font-size: .76rem; color: var(--ink-soft); background: var(--paper-2);
  border-radius: 6px; padding: .28rem .55rem; display: inline-flex; align-items: center; gap: .3rem;
}
.chip svg { width: 1em; height: 1em; flex: none; color: var(--ink-mute); }

.pull {
  font-family: var(--display); font-size: clamp(1.15rem, 2.2vw, 1.5rem); line-height: 1.35;
  font-variation-settings: "SOFT" 10, "WONK" 1; color: var(--ink);
  border-left: 3px solid var(--accent); padding: .2rem 0 .2rem 1.1rem; margin: 1.4rem 0;
}

.book-body { display: grid; gap: clamp(2rem, 5vw, 3.4rem); align-items: start; }
.book-aside { display: grid; gap: 1.2rem; }
.similar-strip { display: grid; gap: .8rem; }
.similar-item { display: flex; gap: .8rem; align-items: center; }
.similar-item .cover { width: 52px; flex: none; }
.similar-item h4 { font-size: .89rem; line-height: 1.3; font-family: var(--display); font-weight: 500; }
.similar-item span { font-size: .78rem; color: var(--ink-mute); }

/* --- Comparador --- */
.cmp-picker { display: grid; gap: 1.2rem; }
.cmp-slots { display: flex; flex-wrap: wrap; gap: .9rem; padding: .4rem .4rem 0; }
.slot-wrap { position: relative; overflow: visible; padding: 8px 8px 0 0; }
.slot-wrap .cover { width: 76px; }
.slot-wrap .remove-badge {
  position: absolute; top: 0; right: 0; width: 22px; height: 22px; border-radius: 50%;
  background: var(--ink); color: var(--paper); font-size: 13px; line-height: 1;
  display: grid; place-items: center; box-shadow: 0 2px 8px rgba(20,22,28,.3); z-index: 3;
}
.slot-wrap .remove-badge:hover { background: var(--accent); }
.slot-empty {
  width: 76px; aspect-ratio: 2/3; border: 1.5px dashed var(--line); border-radius: 5px;
  display: grid; place-items: center; color: var(--line); font-size: 1.5rem; margin: 8px 8px 0 0;
}

.cmp-search { position: relative; max-width: 460px; }
.cmp-search input {
  width: 100%; padding: .78rem 1rem; border: 1px solid var(--line); border-radius: 10px;
  background: var(--surface); font: inherit; font-size: .95rem;
}
.cmp-search input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-tint); }
.cmp-results {
  list-style: none; margin-top: .5rem; border: 1px solid var(--line); border-radius: 10px;
  background: var(--surface); max-height: 290px; overflow-y: auto; box-shadow: var(--shadow-md);
}
.cmp-results:empty { display: none; }
.cmp-results li button {
  display: flex; gap: .7rem; align-items: center; width: 100%; text-align: left;
  padding: .55rem .7rem; border-bottom: 1px solid var(--line-soft);
}
.cmp-results li:last-child button { border-bottom: 0; }
/* El buscador del comparador ya no se queda mudo: cuando no encuentra nada
   (o el libro ya esta elegido) lo dice aqui. */
.cmp-sin-resultados {
  padding: .8rem .85rem; font-size: .84rem; line-height: 1.5;
  color: var(--ink-mute);
}
.cmp-results li button:hover { background: var(--paper-2); }
.cmp-results img { width: 30px; border-radius: 2px; flex: none; }
.cmp-results strong { font-size: .89rem; font-weight: 550; display: block; }
.cmp-results span { font-size: .78rem; color: var(--ink-mute); }

.cmp-table-wrap { overflow-x: auto; margin-top: 1.4rem; -webkit-overflow-scrolling: touch; }
.cmp-table { width: 100%; min-width: 560px; font-size: .9rem; border-collapse: separate; border-spacing: 0; }
.cmp-table th, .cmp-table td { padding: .68rem .8rem; text-align: left; border-bottom: 1px solid var(--line-soft); vertical-align: middle; }
.cmp-table thead th { vertical-align: bottom; border-bottom: 1.5px solid var(--line); background: var(--paper); }
.cmp-table tbody th {
  position: sticky; left: 0; background: var(--paper); z-index: 2;
  font-weight: 500; color: var(--ink-mute); width: 150px; min-width: 150px;
}
.cmp-table td { font-variant-numeric: tabular-nums; }
.cmp-table .is-best { background: #E9F2EC; font-weight: 650; position: relative; }
.cmp-table .is-best::after {
  content: "mejor"; font-size: .6rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--good); font-weight: 700; margin-left: .45rem;
}
.cmp-col-head { min-width: 152px; }
.cmp-col-head .cover { width: 66px; margin-bottom: .5rem; }
.cmp-col-head h3 { font-size: .92rem; line-height: 1.25; margin-bottom: .15rem; }
.cmp-col-head .author { font-size: .77rem; color: var(--ink-mute); }
.cmp-table tfoot td { border-bottom: 0; padding-top: 1rem; }
.cmp-empty { padding: 2.4rem 1.2rem; text-align: center; color: var(--ink-mute); border: 1.5px dashed var(--line); border-radius: var(--radius); }

/* --- Guías --- */
.guide-hero { padding-block: clamp(2.4rem, 6vw, 4rem) 1rem; }
.guide-pick {
  display: grid; gap: 1.4rem; padding: clamp(1.2rem, 3vw, 1.9rem);
  border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface);
  margin-bottom: 1.4rem;
}
.guide-pick .cover { width: 118px; }
.guide-rank {
  font-family: var(--display); font-size: 2.4rem; line-height: 1; color: var(--accent);
  font-variation-settings: "SOFT" 12, "WONK" 1; margin-bottom: .2rem;
}
.guide-pick h3 { font-size: 1.35rem; margin-bottom: .2rem; }
.guide-pick .why { font-family: var(--serif); color: var(--ink-soft); margin: .7rem 0 .9rem; line-height: 1.65; }
.guide-toc { background: var(--paper-2); border-radius: var(--radius); padding: 1.15rem 1.35rem; margin-bottom: 2rem; }
.guide-toc h2 { font-family: var(--sans); font-size: .74rem; font-weight: 700; letter-spacing: .13em; text-transform: uppercase; color: var(--ink-mute); margin-bottom: .7rem; }
.guide-toc ol { margin-left: 1.1rem; display: grid; gap: .35rem; font-size: .93rem; }
.guide-toc a:hover { color: var(--accent); }

.faq { display: grid; gap: .7rem; }
.faq details {
  border: 1px solid var(--line-soft); border-radius: var(--radius); background: var(--surface);
  padding: .95rem 1.15rem;
}
.faq summary { font-weight: 600; cursor: pointer; font-size: .98rem; list-style: none; display: flex; justify-content: space-between; gap: 1rem; align-items: center; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 1.3rem; line-height: 1; flex: none; }
.faq details[open] summary::after { content: "–"; }
.faq p { margin-top: .7rem; color: var(--ink-soft); font-family: var(--serif); line-height: 1.65; }

/* --- Filtros de categoría --- */
.filters { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; margin-bottom: 1.8rem; }
.filters label { font-size: .8rem; color: var(--ink-mute); margin-right: .2rem; }
.filters select {
  font: inherit; font-size: .88rem; padding: .5rem .8rem; border-radius: 999px;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
}
/* Antes solo cambiaba el color del borde al enfocar: para quien navega con
   teclado eso es casi invisible. Ahora lleva anillo, como el buscador. */
.filters select:focus-visible { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-tint); }
.filters select:focus { border-color: var(--accent); }
.chip-toggle {
  font-size: .84rem; padding: .45rem .85rem; border-radius: 999px;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink-soft);
  transition: all .25s var(--ease-out);
}
.chip-toggle:hover { border-color: var(--ink-mute); }
.chip-toggle[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--paper); }

/* --- Ofertas --- */
.deal-flag {
  display: inline-flex; align-items: baseline; gap: .35rem;
  font-size: .78rem; font-weight: 700; color: var(--accent);
}
.save-note { font-size: .78rem; color: var(--good); font-weight: 600; }

/* =============================================================
   7. Efectos
   ============================================================= */
/* Solo escondemos para revelar si JS está vivo: la clase .js la pone un script
   en el <head>. Sin JS el contenido se ve tal cual, que es lo que importa. */
.js [data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity .75s var(--ease-out), transform .75s var(--ease-out); }
.js [data-reveal].is-revealed { opacity: 1; transform: none; }
.is-ready [data-reveal-stagger] > * { transition-delay: calc(var(--i, 0) * 55ms); }

@view-transition { navigation: auto; }

/* =============================================================
   8. Responsive (mobile-first)
   ============================================================= */
@media (min-width: 540px) {
  .pc { grid-template-columns: 1fr 1fr; }
  .guide-pick { grid-template-columns: auto 1fr; align-items: start; }
  .book-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
}
@media (min-width: 720px) {
  .brand-tag { display: inline; }
  .trust-grid { grid-template-columns: repeat(3, 1fr); }
  .foot-grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; }
  .book-hero-grid { grid-template-columns: minmax(230px, 300px) 1fr; }
  .hero-grid { grid-template-columns: 1.05fr .95fr; }
  .cmp-table tbody th { width: 178px; min-width: 178px; }
}
@media (min-width: 960px) {
  html { scroll-padding-top: 104px; }
  .nav-links { display: flex; }
  .nav-toggle { display: none; }
  .nav-drawer { display: none !important; }
  .book-body { grid-template-columns: 1fr minmax(260px, 320px); }
  .book-hero-grid { grid-template-columns: minmax(260px, 330px) 1fr; }
  .foot-legal { grid-template-columns: 1fr auto; align-items: center; }
}
@media (min-width: 1280px) {
  .book-grid { grid-template-columns: repeat(5, 1fr); }
}

/* =============================================================
   9. Reduced motion — solo lo intrusivo
   ============================================================= */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-reveal] { transition-duration: .01ms; opacity: 1; transform: none; }
  .shelf-books a:nth-child(odd) { transform: none; }
}

/* =============================================================
   10. Impresión
   ============================================================= */
@media print {
  .site-head, .cmp-bar, .aff-bar, .btn, .nav-drawer { display: none !important; }
  .est-escena { display: none !important; }
  .est-respaldo { display: block !important; }
  body { background: #fff; }
}

/* =============================================================
   11. La estantería en 3D
   -------------------------------------------------------------
   Sin JS no se pinta nada: se ve la rejilla de libros de abajo,
   que es la que Google lee y la que siempre funciona.
   ============================================================= */
/* El navegador esconde [hidden] con display:none, pero cualquier regla nuestra con
   display gana a la suya. Sin este !important, poner .hidden = true desde JS no
   esconde nada: el cartel de "montando" se queda tapando la escena ya montada. */
[hidden] { display: none !important; }

.est-escena { display: none; }
.js .est-escena {
  display: block;
  position: fixed; inset: 0; z-index: 1;
  overflow: hidden;
  background: var(--paper);
  --gen-tela: var(--accent);
  --gen-foil: var(--brass);
}
/* Cuando la escena vive, la página deja de rodar y la rejilla se retira. */
html:has(#estanteria.listo), html:has(#estanteria.listo) body { overflow: hidden; }
#estanteria.listo ~ .est-respaldo { display: none; }

#estanteria-canvas {
  display: block; width: 100%; height: 100%;
  opacity: 0; transition: opacity .9s var(--ease-out);
  touch-action: none; cursor: default;
}
#estanteria.listo #estanteria-canvas { opacity: 1; }
#estanteria-canvas.sobre-lomo,
#estanteria-canvas.sobre-libro { cursor: pointer; }
.modo-detalle #estanteria-canvas { cursor: grab; }
.modo-detalle #estanteria-canvas.sobre-pagina { cursor: grab; }
.modo-detalle #estanteria-canvas.arrastrando,
.modo-detalle #estanteria-canvas:active { cursor: grabbing; }

/* --- Cargando --- */
.est-cargando {
  position: absolute; inset: 0; z-index: 20;
  display: grid; place-items: center; gap: 1rem;
  align-content: center;
  background: var(--paper);
}
.est-cargando p {
  font-family: var(--sans); font-size: .68rem; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase; color: var(--ink-mute);
}
.est-cargando-marca {
  width: 46px; height: 58px;
  border: 1px solid var(--ink); border-radius: 2px 5px 5px 2px;
  position: relative;
  animation: est-encuadernar 1.6s var(--ease-out) infinite alternate;
}
.est-cargando-marca::before {
  content: ""; position: absolute; top: -1px; bottom: -1px; left: 7px;
  width: 1px; background: var(--ink); opacity: .45;
}
@keyframes est-encuadernar {
  from { transform: rotateY(-8deg) translateY(2px); }
  to   { transform: rotateY(14deg) translateY(-2px); }
}

/* --- Barra inferior: qué libro estoy mirando --- */
.est-barra {
  position: absolute; right: 2rem; bottom: 1.6rem; left: 2rem; z-index: 10;
  display: grid; grid-template-columns: minmax(220px, 1fr) auto minmax(200px, 1fr);
  align-items: end; gap: 1.6rem;
  color: var(--ink);
  transition: opacity .4s var(--ease-out), transform .65s var(--ease-out);
}
.modo-detalle .est-barra { opacity: 0; transform: translateY(26px); pointer-events: none; }
.est-sel { display: grid; grid-template-columns: 44px minmax(0, 1fr); align-items: start; gap: .8rem; }
.est-contador {
  padding-top: .45rem;
  font-family: var(--sans); font-size: .62rem; font-weight: 600;
  letter-spacing: .13em; color: var(--ink-mute); font-variant-numeric: tabular-nums;
}
.est-sel-titulo {
  margin: 0; font-family: var(--display);
  font-size: clamp(1.7rem, 3.1vw, 2.9rem); font-weight: 400;
  letter-spacing: -.03em; line-height: .96;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.est-sel-nota {
  margin: .35rem 0 0; max-width: 34ch;
  font-family: var(--sans); font-size: .78rem; color: var(--ink-mute);
}
.est-acciones { display: flex; align-items: center; justify-content: center; gap: .35rem; padding-bottom: .3rem; }
.est-redondo, .est-texto, .est-pag, .est-cerrar {
  border: 1px solid color-mix(in srgb, var(--ink) 34%, transparent);
  background: rgba(245,244,240,.72);
  color: var(--ink); cursor: pointer;
  transition: color .18s, background .18s, border-color .18s, transform .18s var(--ease-out);
  backdrop-filter: blur(8px);
}
.est-redondo { display: grid; place-items: center; width: 40px; height: 40px; padding: 0; border-radius: 50%; }
.est-redondo svg, .est-pag svg, .est-cerrar svg {
  width: 15px; height: 15px; fill: none; stroke: currentColor;
  stroke-width: 1.35; stroke-linecap: round; stroke-linejoin: round;
}
.est-texto {
  min-height: 40px; padding: 0 1.15rem; border-radius: 999px;
  font-family: var(--sans); font-size: .68rem; font-weight: 600;
  letter-spacing: .1em; text-transform: uppercase;
}
.est-redondo:hover, .est-texto:hover, .est-pag:not(:disabled):hover, .est-cerrar:hover {
  color: var(--paper); background: var(--ink); border-color: var(--ink); transform: translateY(-1px);
}
.est-indice { display: grid; justify-items: end; gap: .55rem; padding-bottom: .4rem; }
.est-marcadores { display: flex; align-items: center; justify-content: flex-end; gap: .3rem; flex-wrap: wrap; }
.est-marcador {
  position: relative; width: 26px; height: 24px; padding: 0;
  border: 0; background: transparent; cursor: pointer;
}
.est-marcador::before {
  content: ""; position: absolute; top: 50%; left: 50%;
  width: 16px; height: 1px; background: color-mix(in srgb, var(--ink) 34%, transparent);
  transform: translate(-50%, -50%);
  transition: width .26s var(--ease-out), height .26s var(--ease-out), background .22s;
}
.est-marcador:hover::before { background: var(--ink); }
.est-marcador[aria-current="true"]::before { width: 26px; height: 2px; background: var(--gen-foil); }
.est-pista {
  margin: 0; font-family: var(--sans); font-size: .58rem; font-weight: 500;
  letter-spacing: .13em; text-transform: uppercase; color: var(--ink-mute); text-align: right;
}

/* --- Etiqueta que sigue al ratón --- */
.est-etiqueta {
  position: fixed; z-index: 30; display: grid; min-width: 132px;
  padding: .55rem .7rem; pointer-events: none;
  border: 1px solid var(--line);
  background: rgba(245,244,240,.93); backdrop-filter: blur(8px);
  box-shadow: 0 8px 24px rgba(21,24,26,.09);
  transform: translate(16px, 18px);
  transition: opacity .12s ease;
}
.est-etiqueta[aria-hidden="true"] { opacity: 0; }
.est-etiqueta span {
  font-family: var(--sans); font-size: .58rem; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase; color: var(--ink-mute);
}
.est-etiqueta strong { font-family: var(--display); font-size: .96rem; font-weight: 400; line-height: 1.2; }
@media (pointer: coarse) { .est-etiqueta { display: none; } }

/* --- Panel del libro abierto --- */
.est-panel {
  position: absolute; z-index: 15;
  /* Antes iba centrado (top:50%) y se metia POR DEBAJO de la cabecera, que esta
     en z-index 200: la cruz de cerrar chocaba con el menu. Ahora arranca donde
     acaba la cabecera. --est-cabecera la mide el propio JS al arrancar y en
     cada cambio de tamano, para no dejar aqui un numero que caduque. */
  top: calc(var(--est-cabecera, 69px) + 1.1rem);
  right: clamp(1.5rem, 4vw, 4.5rem);
  width: min(34vw, 430px);
  max-height: calc(100dvh - var(--est-cabecera, 69px) - 3rem);
  /* Fondo propio. Sin el, el texto oscuro del panel caia directamente sobre la
     pared de madera y no habia manera de leer ni el titulo ni los pros. */
  padding: 1.35rem 1.45rem 1rem;
  border: 1px solid color-mix(in srgb, var(--ink) 12%, transparent);
  border-radius: 16px;
  background: rgba(245, 244, 240, .97);
  box-shadow: 0 26px 70px rgba(14, 9, 5, .45);
  overflow-y: auto; overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: rgba(21, 24, 26, .28) transparent;
  color: var(--ink);
  /* El gris de siempre se quedaba en 4,44 de contraste sobre este fondo y el
     minimo legal es 4,5. Se oscurece solo dentro del panel. */
  --ink-mute: #575F5C;
  opacity: 0; transform: translateY(26px); pointer-events: none;
  transition: opacity .6s var(--ease-out), transform .6s var(--ease-out);
}
@supports (backdrop-filter: blur(4px)) {
  .est-panel { background: rgba(245, 244, 240, .92); backdrop-filter: saturate(150%) blur(16px); }
}
.modo-detalle .est-panel {
  opacity: 1; transform: translateY(0); pointer-events: auto;
  transition-delay: .3s;
}
.modo-detalle.abriendo .est-panel { pointer-events: none; }
.est-cerrar {
  position: absolute; top: .7rem; right: .7rem;
  display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%;
  background: var(--paper); z-index: 2;
}
.est-genero {
  margin: 0 46px .7rem 0;
  font-family: var(--sans); font-size: .62rem; font-weight: 600;
  letter-spacing: .13em; text-transform: uppercase; color: var(--ink-mute);
}
.est-titulo {
  margin: 0; max-width: calc(100% - 30px);
  font-family: var(--display); font-size: clamp(1.9rem, 3.4vw, 3.1rem);
  font-weight: 400; letter-spacing: -.035em; line-height: .94; text-wrap: balance;
}
.est-autor { margin: .5rem 0 0; font-family: var(--sans); font-size: .85rem; color: var(--ink-mute); }
.est-sinopsis {
  margin: 1.1rem 0 0; font-family: var(--serif);
  font-size: 1.02rem; line-height: 1.55; color: var(--ink-soft);
}
.est-pros { margin: 1.1rem 0 0; padding: 0; list-style: none; display: grid; gap: .45rem; }
.est-pros li {
  position: relative; padding-left: 1.2rem;
  font-family: var(--sans); font-size: .82rem; line-height: 1.45; color: var(--ink-soft);
}
.est-pros li::before {
  content: "+"; position: absolute; left: 0; top: -.05rem;
  font-weight: 700; color: var(--good);
}
.est-datos {
  display: grid; grid-template-columns: 1fr 1fr; gap: .9rem 1.2rem;
  margin: 1.3rem 0 0; padding: 1rem 0 0;
  border-top: 1px solid color-mix(in srgb, var(--ink) 20%, transparent);
}
.est-datos dt {
  margin: 0 0 .25rem;
  font-family: var(--sans); font-size: .58rem; font-weight: 600;
  letter-spacing: .12em; text-transform: uppercase; color: var(--ink-mute);
}
.est-datos dd { margin: 0; font-family: var(--sans); font-size: .84rem; font-weight: 600; }
.est-cta { display: grid; gap: .5rem; margin-top: 1.4rem; }
.est-precio {
  margin: .55rem 0 0; text-align: center;
  font-family: var(--sans); font-size: .7rem; color: var(--ink-mute);
}
.est-hojear {
  display: grid; grid-template-columns: 40px minmax(0, 1fr) 40px;
  align-items: center; gap: .7rem;
  margin-top: 1.4rem; padding-top: 1.1rem;
  border-top: 1px solid color-mix(in srgb, var(--ink) 20%, transparent);
}
.est-pag { display: grid; place-items: center; width: 40px; height: 40px; padding: 0; border-radius: 50%; }
.est-pag:disabled { opacity: .3; cursor: default; }
.est-pag-estado { display: grid; gap: .18rem; margin: 0; text-align: center; min-width: 0; }
.est-pag-estado strong {
  font-family: var(--display); font-size: .92rem; font-weight: 400; line-height: 1.2;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.est-pag-estado span {
  font-family: var(--sans); font-size: .56rem; font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase; color: var(--ink-mute);
}
.est-panel-pie {
  display: flex; align-items: end; justify-content: space-between;
  gap: .9rem; margin-top: 1.1rem; padding-bottom: .4rem;
}
.est-panel-pie .est-pista { text-align: left; max-width: 26ch; }
.est-panel-botones { display: flex; gap: 1rem; flex: 0 0 auto; }
.est-enlace {
  padding: 0 0 .15rem; border: 0; border-bottom: 1px solid color-mix(in srgb, var(--ink) 50%, transparent);
  background: transparent; color: var(--ink); cursor: pointer;
  font-family: var(--sans); font-size: .68rem; font-weight: 600;
  letter-spacing: .1em; text-transform: uppercase;
  transition: color .18s, border-color .18s;
}
.est-enlace:hover { color: var(--gen-tela); border-color: var(--gen-tela); }

/* --- Móvil: el panel se va abajo y el libro sube --- */
@media (max-width: 820px) {
  .est-barra {
    right: 1rem; bottom: 1rem; left: 1rem;
    grid-template-columns: minmax(0, 1fr) auto; gap: .7rem 1rem;
  }
  .est-sel { grid-column: 1 / -1; }
  .est-sel-nota, .est-indice .est-pista { display: none; }
  .est-acciones { justify-content: flex-start; }
  .est-indice { align-self: center; }
  .est-panel {
    top: auto; right: .9rem; bottom: .9rem; left: .9rem;
    width: auto; max-height: 46vh;
    padding: 1.1rem 1.1rem .4rem;
    border: 1px solid var(--line);
    background: rgba(245,244,240,.95); backdrop-filter: blur(14px);
    box-shadow: 0 -10px 40px rgba(21,24,26,.12);
    transform: translateY(20px);
  }
  .modo-detalle .est-panel { transform: translateY(0); }
  .est-cerrar { top: .6rem; right: .6rem; }
  .est-datos { display: none; }
  .est-panel-pie { flex-direction: column; align-items: stretch; }
  .est-panel-pie .est-pista { max-width: none; text-align: center; }
  .est-panel-botones { justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  .est-cargando-marca { animation: none; }
  #estanteria-canvas, .est-barra, .est-panel { transition: none; }
}

/* --- foco en el libro abierto -------------------------------------------
   Con la pared de madera detras, el libro abierto competia con el fondo: la
   escena entera pedia la misma atencion. Un vinneteado suave, solo en modo
   detalle, devuelve la mirada al libro sin apagar la madera del todo.
   Va por encima del lienzo y por debajo del panel (que esta en z-index 15). */
.js .est-escena::after {
  content: ""; position: absolute; inset: 0; z-index: 2;
  pointer-events: none; opacity: 0;
  transition: opacity .6s var(--ease-out);
  background: radial-gradient(118% 88% at 38% 46%,
    transparent 32%, rgba(26, 15, 9, .28) 76%, rgba(18, 10, 6, .5) 100%);
}
.js .est-escena.modo-detalle::after { opacity: 1; }

@media (max-width: 820px) {
  /* en movil el libro va centrado, no desplazado a la izquierda */
  .js .est-escena::after {
    background: radial-gradient(120% 62% at 50% 38%,
      transparent 34%, rgba(26, 15, 9, .26) 74%, rgba(18, 10, 6, .48) 100%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .js .est-escena::after { transition: none; }
}


/* =========================================================================
   12 · GUÍA POR LA INTERFAZ
   Se enseña sola la primera vez y se puede repetir desde el pie. El recuadro
   que ilumina el elemento no es un agujero de verdad: es un rectángulo con una
   sombra enorme alrededor, que oscurece el resto de la página sin taparlo.
   ========================================================================= */
.guia-capa {
  position: fixed; inset: 0; z-index: 400;
}
.guia-foco {
  position: fixed; border-radius: 12px;
  box-shadow: 0 0 0 9999px rgba(14, 16, 18, .62);
  outline: 2px solid var(--brass); outline-offset: 0;
  transition: top .28s var(--ease-out), left .28s var(--ease-out),
              width .28s var(--ease-out), height .28s var(--ease-out);
  pointer-events: none;
}
.guia-globo {
  position: fixed; width: min(340px, calc(100vw - 24px));
  padding: 1.15rem 1.25rem 1.05rem;
  border: 1px solid var(--line); border-radius: 14px;
  background: var(--surface); color: var(--ink);
  box-shadow: 0 22px 60px rgba(12, 8, 4, .38);
}
.guia-globo::before {
  content: ""; position: absolute; top: -7px; left: 50%; width: 13px; height: 13px;
  margin-left: -6px; transform: rotate(45deg);
  background: var(--surface);
  border-left: 1px solid var(--line); border-top: 1px solid var(--line);
}
.guia-globo-arriba::before {
  top: auto; bottom: -7px;
  border-left: 0; border-top: 0;
  border-right: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.guia-cuenta {
  margin: 0 0 .35rem; font-family: var(--sans); font-size: .68rem;
  font-weight: 600; letter-spacing: .11em; text-transform: uppercase;
  color: var(--ink-mute);
}
.guia-globo h2 {
  margin: 0 0 .4rem; font-family: var(--display);
  font-size: 1.24rem; font-weight: 400; line-height: 1.15; letter-spacing: -.015em;
}
.guia-globo p[data-guia-texto] {
  margin: 0; font-family: var(--sans); font-size: .87rem; line-height: 1.55;
  color: var(--ink-soft);
}
.guia-botones {
  display: flex; align-items: center; justify-content: space-between;
  gap: .6rem; margin-top: 1.1rem;
}
.guia-nav { display: flex; gap: .4rem; }
.guia-botones .btn { padding: .42rem .85rem; font-size: .82rem; }
.guia-botones .btn[disabled] { opacity: .38; pointer-events: none; }

/* La página SÍ tiene que poder rodar mientras la guía está abierta: los pasos
   están repartidos por toda la portada y hay que llegar hasta ellos. Bloquear
   el scroll aquí hacía que los pasos 2, 3 y 4 no llegaran a verse nunca (en el
   comparador no se notaba porque todo cae en la primera pantalla).
   No hace falta bloquear nada: la capa ya impide tocar la página por detrás. */

@media (max-width: 620px) {
  .guia-globo { left: 12px !important; right: 12px; width: auto; }
  .guia-globo::before { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .guia-foco { transition: none; }
}

/* El botón de la guía, en la cabecera. Sin JavaScript no haría nada, así que
   ni se enseña. Solo aparece en las páginas que tienen guía. */
html:not(.js) .btn-guia { display: none; }
.btn-guia {
  display: grid; place-items: center; flex: none;
  width: 34px; height: 34px; margin-left: .1rem;
  border: 1px solid var(--line); border-radius: 50%;
  background: transparent; color: var(--ink-mute);
  cursor: pointer;
  transition: color .2s var(--ease-out), border-color .2s var(--ease-out),
              background .2s var(--ease-out);
}
.btn-guia svg { width: 18px; height: 18px; }
.btn-guia:hover { color: var(--accent); border-color: var(--accent); background: var(--accent-tint); }
@media (max-width: 900px) {
  /* en móvil vive dentro del menú desplegable, como una opción más */
  .head-inner > .btn-guia { display: none; }
}