/* =====================================================================
   CraftHaus Digital — Editorial Papel
   Sistema visual compartido por todas las páginas.
   Estático, sin build, sin dependencias.
   ===================================================================== */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* Paleta — papel editorial (parchment cálido + acento naranja vivo) */
  --bg:        #F0E8D6;   /* fondo parchment kraft, más cálido que crema */
  --surface:   #E9E0CB;   /* superficie papel (-1 escalón) */
  --surface-2: #E1D6BC;   /* superficie elevada (-2 escalones) */
  --ink:       #1A1814;   /* tinta casi-negra */
  --ink-soft:  #5C554B;   /* tinta suave (oscurecida un punto para presencia del body) */
  --ink-faint: #6B6158;   /* tinta muy tenue */
  --line:      #D4C9AE;   /* filetes finos (ajustado al fondo más cálido) */
  --line-soft: #DDD2B8;

  /* Acentos — naranja vivo (más luminoso y saturado que el terracota previo) */
  --accent:       #B8420E;   /* naranja vivo, cálido */
  --accent-hover: #9A3509;
  --accent-dim:   rgba(184.66.14.0.10);
  --accent-bdr:   rgba(226,83,22,0.32);
  --green:      #3F7A4E;
  --green-dim:  rgba(63,122,78,0.10);
  --green-bdr:  rgba(63,122,78,0.30);
  --amber-warn: #B8862F;
  --amber-dim:  rgba(184,134,47,0.10);
  --amber-bdr:  rgba(184,134,47,0.30);
  --red-warn:   #B23A2E;
  --red-dim:    rgba(178,58,46,0.08);
  --red-bdr:    rgba(178,58,46,0.28);

  /* Tipografías */
  --font-disp: 'Fraunces', 'Fraunces-fallback', Georgia, serif;
  --font-body: 'Inter', 'Inter-fallback', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'JetMono-fallback', ui-monospace, monospace;

  /* Métricas */
  --maxw: 1120px;
  --gutter: 28px;
}

/* Fallbacks tipográficos locales */
@font-face {
  font-family: 'Fraunces-fallback'; src: local('Georgia'); size-adjust: 96%;
}
@font-face {
  font-family: 'Inter-fallback'; src: local('Arial'); size-adjust: 100%;
}
@font-face {
  font-family: 'JetMono-fallback'; src: local('Consolas'); size-adjust: 108%;
}

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 450;          /* Variante B: más presencia en el cuerpo */
  line-height: 1.7;          /* Variante B: más aire entre líneas */
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Textura sutil de papel (gradientes muy tenues, sin imágenes externas) */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(rgba(26,24,20,0.018) 1px, transparent 1px);
  background-size: 3px 3px;
}

img { max-width: 100%; display: block; }
a { color: inherit; }

/* ---------- Contenedor ---------- */
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); position: relative; z-index: 1; }
.container-narrow { max-width: 820px; margin: 0 auto; padding: 0 var(--gutter); position: relative; z-index: 1; }
.mono { font-family: var(--font-mono); }

/* ---------- Eyebrow / etiquetas ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}
.eyebrow::before { content: '— '; opacity: 0.5; }

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px; font-weight: 500;
  letter-spacing: 0.10em; text-transform: uppercase;
  padding: 4px 10px;
  border: 1px solid var(--accent-bdr);
  color: var(--accent);
  background: var(--accent-dim);
}
.tag.active { border-color: var(--green-bdr); color: var(--green); background: var(--green-dim); }
.tag.soon   { border-color: var(--line); color: var(--ink-faint); background: transparent; }
.tag.num    { border-color: var(--line); color: var(--ink-soft); background: var(--surface); }

.section-label {
  font-family: var(--font-mono);
  font-size: 10px; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 28px;
}

/* ---------- Tipografía editorial ---------- */
h1, h2, h3, h4 { font-family: var(--font-disp); font-weight: 600; line-height: 1.12; color: var(--ink); letter-spacing: -0.01em; }
h1 em, h2 em { font-style: italic; font-weight: 600; color: var(--accent); }
.lead { font-size: 17px; color: var(--ink-soft); line-height: 1.7; }

.page-head { padding: 72px 0 52px; border-bottom: 1px solid var(--line); }
.page-head h1 { font-size: clamp(30px, 4.6vw, 54px); font-weight: 600; margin-bottom: 18px; }
.page-head .lead { max-width: 600px; }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase;
  text-decoration: none;
  padding: 14px 26px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.18s, border-color 0.18s, color 0.18s;
  white-space: nowrap;
}
.btn-primary { background: var(--accent); color: var(--bg); border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--ink); color: var(--ink); }
.btn-link {
  background: transparent; color: var(--accent); border: none; padding: 0;
  font-family: var(--font-mono); font-size: 12px;
  letter-spacing: 0.08em; text-transform: uppercase;
  text-decoration: none; cursor: pointer;
}
.btn-link:hover { color: var(--accent-hover); text-decoration: underline; text-underline-offset: 4px; }

/* ---------- Navegación ---------- */
.site-nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(245,241,234,0.90);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter);
}
.nav-logo {
  font-family: var(--font-disp);
  font-size: 17px; font-weight: 600;
  letter-spacing: -0.01em; color: var(--ink);
  text-decoration: none;
}
.nav-logo span { color: var(--accent); }
.nav-links { display: flex; align-items: center; gap: 30px; list-style: none; }
.nav-links a {
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 500;
  letter-spacing: 0.10em; text-transform: uppercase;
  color: var(--ink-soft);
  text-decoration: none;
  transition: color 0.18s;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a.active { color: var(--accent); }
.nav-cta { color: var(--accent) !important; border: 1px solid var(--accent-bdr); padding: 7px 16px; }
.nav-cta:hover { background: var(--accent-dim); }

/* Toggle de idioma */
.lang-toggle { display: flex; border: 1px solid var(--line); }
.lang-toggle button {
  background: none; border: none; cursor: pointer;
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 500;
  letter-spacing: 0.06em;
  padding: 6px 11px;
  color: var(--ink-faint);
  transition: all 0.18s;
}
.lang-toggle button.active { background: var(--ink); color: var(--bg); }
.lang-toggle button:hover:not(.active) { color: var(--ink); }

/* Menú móvil */
.nav-burger { display: none; background: none; border: 1px solid var(--line); cursor: pointer; padding: 8px 11px; }
.nav-burger span { display: block; width: 18px; height: 2px; background: var(--ink); margin: 3px 0; }

/* ---------- Breadcrumb ---------- */
.breadcrumb { padding: 18px 0; border-bottom: 1px solid var(--line); }
.crumb-inner {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 11px; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--ink-faint);
}
.crumb-inner a { color: var(--ink-soft); text-decoration: none; }
.crumb-inner a:hover { color: var(--accent); }
.crumb-inner .sep { color: var(--line); }
.crumb-inner .current { color: var(--ink); }

/* ---------- Secciones ---------- */
.section { padding: 80px 0; border-bottom: 1px solid var(--line); }
.section:last-child { border-bottom: none; }
.section-head {
  display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: 40px; gap: 24px; flex-wrap: wrap;
}
.section-head h2 { font-size: clamp(24px, 3vw, 34px); }

/* ---------- Matrix (tabla editorial) ---------- */
.matrix { border: 1px solid var(--line); background: var(--surface); }
.matrix-row {
  display: grid;
  grid-template-columns: 56px 1.2fr 2fr 130px;
  border-bottom: 1px solid var(--line);
  text-decoration: none; color: inherit;
  transition: background 0.15s;
}
.matrix-row:last-child { border-bottom: none; }
.matrix-row.header { background: var(--surface-2); }
.matrix-row:hover:not(.header) { background: var(--bg); }
.matrix-row.dimmed .col-name,
.matrix-row.dimmed .col-desc { opacity: 0.5; }
.matrix-cell {
  padding: 22px 18px;
  border-right: 1px solid var(--line);
  display: flex; align-items: center;
}
.matrix-cell:last-child { border-right: none; }
.matrix-row.header .matrix-cell {
  font-family: var(--font-mono);
  font-size: 10px; font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--ink-faint);
  padding: 13px 18px;
}
.col-idx { font-family: var(--font-mono); font-size: 12px; color: var(--ink-faint); }
.col-name { font-family: var(--font-disp); font-size: 17px; font-weight: 600; }
.col-name small {
  display: block; margin-top: 4px;
  font-family: var(--font-mono); font-size: 10px; font-weight: 500;
  letter-spacing: 0.08em; color: var(--accent);
}
.col-name small.muted { color: var(--ink-faint); }
.col-desc { font-size: 14px; color: var(--ink-soft); line-height: 1.55; }

/* ---------- Tarjetas de colección ---------- */
.coll-card {
  display: grid; grid-template-columns: 1fr auto; gap: 28px; align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  padding: 34px;
  text-decoration: none; color: inherit;
  margin-bottom: 16px;
  transition: border-color 0.18s, background 0.18s;
}
.coll-card:hover { border-color: var(--accent-bdr); background: var(--bg); }
.coll-card.dimmed { opacity: 0.55; }
.coll-card .card-num { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.10em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px; }
.coll-card .card-title { font-family: var(--font-disp); font-size: 24px; font-weight: 600; margin-bottom: 10px; }
.coll-card .card-desc { font-size: 14.5px; color: var(--ink-soft); line-height: 1.6; max-width: 580px; }
.coll-card .card-meta { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em; color: var(--ink-faint); margin-top: 14px; }
.coll-card .card-arrow { font-family: var(--font-disp); font-size: 22px; color: var(--accent); }

/* ---------- Cubiertas de libro (CSS, sin imágenes externas) ---------- */
.cover {
  aspect-ratio: 5 / 7.4;
  background: var(--surface-2);
  border: 1px solid var(--line);
  display: flex; flex-direction: column; justify-content: space-between;
  padding: 22px 18px;
  position: relative; overflow: hidden;
}
.cover::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 4px;
  background: var(--accent);
}
.cover-vol { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); }
.cover-title { font-family: var(--font-disp); font-size: 16px; font-weight: 600; line-height: 1.2; }
.cover-sub { font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.10em; text-transform: uppercase; color: var(--ink-faint); margin-top: 6px; }
.cover-brand { font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-faint); }

/* Variantes de paleta por colección (cubiertas) */
.cover.t-trader     { background: #ECE3D2; }
.cover.t-worksite   { background: #E4DFD3; }
.cover.t-business   { background: #EAE4D6; }
.cover.t-ai         { background: #E0E2DC; }
.cover.t-printable  { background: #ECE6DC; }
.cover.t-productivity { background: #E5E2D8; }

/* ---------- Tarjetas de producto / libro ---------- */
.book-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.book-card {
  background: var(--surface);
  border: 1px solid var(--line);
  display: flex; flex-direction: column;
  transition: border-color 0.18s;
}
.book-card:hover { border-color: var(--accent-bdr); }
.book-card .cover { border-bottom: 1px solid var(--line); border-right: none; }
.book-info { padding: 22px; flex: 1; display: flex; flex-direction: column; gap: 8px; }
.book-vol-lbl { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.10em; text-transform: uppercase; color: var(--accent); }
.book-name { font-family: var(--font-disp); font-size: 18px; font-weight: 600; line-height: 1.2; }
.book-desc { font-size: 13.5px; color: var(--ink-soft); line-height: 1.6; flex: 1; }
.book-meta {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: 14px; margin-top: auto;
  border-top: 1px solid var(--line);
}
.book-avail { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-soft); }
.edition-badges { display: flex; gap: 6px; }
.edition-badge { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.04em; color: var(--ink-faint); border: 1px solid var(--line); padding: 2px 7px; }
.book-actions { padding: 16px 22px 22px; display: flex; gap: 8px; }

/* Botón "Comprar" / plataforma */
.btn-buy {
  flex: 1; text-align: center;
  background: var(--accent); color: var(--bg);
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase;
  text-decoration: none; padding: 12px 14px;
  border: 1px solid var(--accent); transition: background 0.18s;
}
.btn-buy:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-buy.alt { background: transparent; color: var(--accent); }
.btn-buy.alt:hover { background: var(--accent-dim); }

/* Estado pendiente (sin enlace falso) */
.btn-pending {
  flex: 1; text-align: center;
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--ink-faint);
  border: 1px dashed var(--line);
  padding: 12px 14px;
}

/* ---------- Grid de productos (catálogo) ---------- */
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 22px; }
.pdf-card {
  background: var(--surface); border: 1px solid var(--line);
  padding: 26px; display: flex; flex-direction: column; gap: 12px;
  transition: border-color 0.18s;
}
.pdf-card:hover { border-color: var(--accent-bdr); }
.pdf-type { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--accent); }
.pdf-name { font-family: var(--font-disp); font-size: 18px; font-weight: 600; line-height: 1.2; }
.pdf-desc { font-size: 13.5px; color: var(--ink-soft); line-height: 1.6; flex: 1; }
.pdf-foot { display: flex; align-items: center; justify-content: space-between; padding-top: 12px; border-top: 1px solid var(--line); }
.pdf-price { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-soft); }
.pdf-cta {
  display: block; width: 100%; margin-top: 6px;
  background: transparent; color: var(--accent);
  font-family: var(--font-mono); font-size: 11px; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase;
  text-decoration: none; padding: 12px 16px;
  border: 1px solid var(--accent-bdr); text-align: center; transition: all 0.18s;
}
.pdf-cta:hover { background: var(--accent-dim); }

/* ---------- Bloques de filosofía / método ---------- */
.two-col { display: grid; grid-template-columns: 1fr 1.4fr; gap: 64px; align-items: start; }
.two-col.even { grid-template-columns: 1fr 1fr; }
.label-col { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); padding-top: 6px; }
.body-col h2 { font-size: clamp(22px, 2.6vw, 30px); margin-bottom: 18px; }
.body-col p { font-size: 15.5px; color: var(--ink-soft); line-height: 1.75; margin-bottom: 16px; }

/* Lista de reglas (método) */
.rule-list { display: flex; flex-direction: column; margin-top: 8px; }
.rule-item { padding: 20px 0; border-bottom: 1px solid var(--line); display: flex; gap: 18px; align-items: start; }
.rule-item:first-child { border-top: 1px solid var(--line); }
.rule-num { font-family: var(--font-mono); font-size: 12px; color: var(--accent); flex-shrink: 0; margin-top: 2px; min-width: 24px; }
.rule-text { font-size: 14.5px; color: var(--ink-soft); line-height: 1.6; }
.rule-text strong { display: block; color: var(--ink); font-weight: 600; font-family: var(--font-disp); font-size: 16px; margin-bottom: 3px; }

/* Bucle del método */
.method-loop { display: flex; align-items: stretch; gap: 0; margin-top: 24px; flex-wrap: wrap; }
.loop-step { flex: 1; min-width: 120px; border: 1px solid var(--line); border-right: none; padding: 18px 16px; background: var(--surface); }
.loop-step:last-child { border-right: 1px solid var(--line); }
.loop-num { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.10em; color: var(--accent); margin-bottom: 6px; }
.loop-name { font-family: var(--font-disp); font-size: 15px; font-weight: 600; }
.loop-arrow { display: flex; align-items: center; padding: 0 4px; color: var(--accent); font-family: var(--font-mono); }

/* Pills de posicionamiento */
.pills { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.pill { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink); padding: 6px 12px; border: 1px solid var(--line); }
.pill.cross { text-decoration: line-through; opacity: 0.65; }
.pill.on { color: var(--accent); border-color: var(--accent-bdr); }

/* Bloque "para quién" */
.split-lists { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.split-block { background: var(--surface); border: 1px solid var(--line); padding: 30px; }
.split-block h3 { font-family: var(--font-mono); font-size: 11px; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; margin-bottom: 18px; }
.split-block.yes h3 { color: var(--green); }
.split-block.no h3 { color: var(--ink-faint); }
.split-block ul { list-style: none; display: flex; flex-direction: column; gap: 11px; }
.split-block li { font-size: 14.5px; color: var(--ink-soft); line-height: 1.5; display: flex; gap: 10px; }
.split-block.yes li::before { content: '→'; color: var(--green); font-family: var(--font-mono); flex-shrink: 0; }
.split-block.no li::before { content: '✕'; color: var(--ink-faint); opacity: 0.5; font-family: var(--font-mono); flex-shrink: 0; }

/* ---------- CTA banner ---------- */
.cta-banner { background: var(--surface); border: 1px solid var(--accent-bdr); padding: 38px 42px; display: grid; grid-template-columns: 1fr auto; gap: 32px; align-items: center; }
.cta-banner h3 { font-family: var(--font-disp); font-size: clamp(19px, 2.4vw, 25px); font-weight: 600; margin-bottom: 8px; }
.cta-banner p { font-size: 14.5px; color: var(--ink-soft); line-height: 1.6; max-width: 480px; }

/* ---------- Estadísticas ---------- */
.stats-row { display: flex; gap: 48px; flex-wrap: wrap; padding-top: 36px; border-top: 1px solid var(--line); margin-top: 44px; }
.stat-val { font-family: var(--font-disp); font-size: 34px; font-weight: 600; line-height: 1; }
.stat-lbl { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-faint); margin-top: 7px; }

/* ---------- Disclaimer ---------- */
.disclaimer { padding: 40px 0; border-top: 1px solid var(--line); }
.disclaimer p { font-family: var(--font-mono); font-size: 11.5px; color: var(--ink-faint); line-height: 1.75; }

/* Bloque de contacto */
.contact-box { background: var(--surface); border: 1px solid var(--accent-bdr); padding: 30px; margin-top: 28px; }
.contact-box .ct-lbl { font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); margin-bottom: 12px; }
.contact-box .ct-email { font-family: var(--font-mono); font-size: 16px; color: var(--ink); }
.contact-box .ct-note { font-size: 13px; color: var(--ink-soft); margin-top: 8px; }

/* Bloque de info (legal) */
.info-box { background: var(--surface); border: 1px solid var(--line); padding: 22px; margin-top: 14px; }
.info-box p { font-family: var(--font-mono); font-size: 12.5px; color: var(--ink-soft); line-height: 1.9; }
.warn-box { background: var(--accent-dim); border: 1px solid var(--accent-bdr); padding: 22px; margin-top: 14px; }
.warn-box p { font-family: var(--font-mono); font-size: 12.5px; color: var(--ink-soft); line-height: 1.8; }

/* ---------- Página placeholder de colección "próximamente" ---------- */
.placeholder-hero { padding: 96px 0 80px; text-align: left; border-bottom: 1px solid var(--line); }
.placeholder-hero .status-box { display: inline-flex; align-items: center; gap: 12px; background: var(--surface); border: 1px solid var(--accent-bdr); padding: 14px 22px; margin-top: 32px; }
.placeholder-hero .status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }
.placeholder-hero .status-text { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.10em; text-transform: uppercase; color: var(--accent); }

/* ---------- Footer ---------- */
.site-footer { padding: 48px 0 56px; border-top: 1px solid var(--line); background: var(--surface); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 24px; }
.footer-logo { font-family: var(--font-disp); font-size: 15px; font-weight: 600; color: var(--ink); text-decoration: none; }
.footer-logo span { color: var(--accent); }
.footer-links { display: flex; gap: 24px; list-style: none; flex-wrap: wrap; }
.footer-links a { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-soft); text-decoration: none; }
.footer-links a:hover { color: var(--accent); }
.footer-copy { font-family: var(--font-mono); font-size: 11px; color: var(--ink-faint); }

/* ---------- Bilingüismo (mecanismo original mantenido) ---------- */
[data-es] { display: none; }
body.lang-es [data-en] { display: none; }
body.lang-es [data-es] { display: revert; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .two-col, .two-col.even { grid-template-columns: 1fr; gap: 32px; }
  .book-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  :root { --gutter: 20px; }
  .nav-links { display: none; }
  .nav-burger { display: block; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: absolute; top: 64px; left: 0; right: 0;
    background: var(--bg); border-bottom: 1px solid var(--line);
    padding: 16px var(--gutter); gap: 18px;
  }
  .page-head { padding: 52px 0 40px; }
  .section { padding: 56px 0; }
  .book-grid { grid-template-columns: 1fr; }
  .matrix-row { grid-template-columns: 44px 1fr 100px; }
  .matrix-cell:nth-child(3) { display: none; }
  .matrix-row.header .matrix-cell:nth-child(3) { display: none; }
  .coll-card { grid-template-columns: 1fr; }
  .coll-card .card-arrow { display: none; }
  .split-lists { grid-template-columns: 1fr; }
  .cta-banner { grid-template-columns: 1fr; padding: 28px; }
  .stats-row { gap: 28px; }
  .loop-step { min-width: calc(50% - 1px); border-right: 1px solid var(--line) !important; border-bottom: none; }
  .loop-step:nth-child(odd) { border-right: none !important; }
}
@media (max-width: 480px) {
  .nav-logo { font-size: 15px; }
  .lang-toggle button { padding: 6px 9px; font-size: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}