/* ==========================================================================
   El arte de preguntar — David Luquin (Espasa)
   Sitio de marketing · estático. Rojo #E30713 dominante, negro y blanco.
   Tokens compilados del Design System oficial del libro.
   ========================================================================== */

/* ------------------------------------------------------------------ TOKENS */
:root {
  /* Brand */
  --red:        #E30713;
  --red-strong: #B60310;
  --red-deep:   #8E020C;
  --black:      #121110;
  --ink:        #1B1815;
  --ink-soft:   #4E4842;
  --ink-faint:  #857D74;
  --white:      #FFFFFF;
  --paper:      #FFFFFF;
  --on-red:     #FFFFFF;
  --on-black:   #FBF8F3;
  --line:       #E6DCCD;
  --line-ink:   #2E2A25;

  /* Type */
  --font-display: "Bodoni Moda", Georgia, "Times New Roman", serif;
  --font-serif:   "Spectral", Georgia, "Times New Roman", serif;
  --font-sans:    "Instrument Sans", ui-sans-serif, system-ui, sans-serif;
  --tracking-label: 0.14em;
  --tracking-tight: -0.02em;

  /* Layout */
  --container: 1180px;
  --gutter: clamp(1.25rem, 5vw, 4rem);
  --radius-md: 6px;
  --radius-lg: 12px;
  --radius-xl: 20px;
  --radius-pill: 999px;

  /* Motion */
  --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur-fast: 140ms;
  --dur-base: 240ms;

  /* Shadows */
  --shadow-md: 0 8px 24px rgba(20, 15, 12, 0.18);
  --shadow-lg: 0 24px 60px rgba(20, 15, 12, 0.30);

  --header-h: 68px;
}

/* ------------------------------------------------------------------- RESET */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; scroll-padding-top: var(--header-h); }
body {
  margin: 0;
  font-family: var(--font-serif);
  color: var(--ink);
  background: var(--black);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 700; line-height: 1.08; margin: 0; letter-spacing: var(--tracking-tight); }
p { margin: 0; }
::selection { background: var(--red); color: #fff; }

/* Scrollbar */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--black); }
::-webkit-scrollbar-thumb { background: var(--red-deep); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: var(--red); }

/* --------------------------------------------------------------- HELPERS */
.wrap { max-width: var(--container); margin: 0 auto; padding-left: var(--gutter); padding-right: var(--gutter); }
.eyebrow {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  display: inline-block;
}
.section { position: relative; overflow: hidden; }
.section-pad { padding-block: clamp(56px, 9vw, 118px); }

/* Big "?" watermark */
.qmark-bg {
  position: absolute;
  pointer-events: none;
  z-index: 0;
  user-select: none;
}
.section > .wrap { position: relative; z-index: 1; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  font-family: var(--font-sans); font-weight: 600; font-size: .95rem;
  padding: .85rem 1.6rem; border-radius: var(--radius-pill);
  border: 1.5px solid transparent; transition: background var(--dur-fast) var(--ease-out),
    color var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out), transform var(--dur-fast);
  will-change: transform;
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--red); color: #fff; }
.btn--primary:hover { background: var(--red-strong); }
.btn--onred { background: #fff; color: var(--red-deep); }
.btn--onred:hover { background: var(--black); color: #fff; }
.btn--onblack { background: var(--red); color: #fff; }
.btn--onblack:hover { background: #fff; color: var(--black); }
.btn--ghost-light { background: transparent; color: #fff; border-color: rgba(255,255,255,.55); }
.btn--ghost-light:hover { background: #fff; color: var(--red-deep); border-color: #fff; }
.btn--ghost-dark { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn--ghost-dark:hover { background: var(--ink); color: #fff; }
.btn--lg { padding: 1rem 2rem; font-size: 1rem; }

/* =====================================================================
   HEADER
   ===================================================================== */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  height: var(--header-h);
  display: flex; align-items: center;
  transition: background var(--dur-base) var(--ease-out), box-shadow var(--dur-base), border-color var(--dur-base);
  border-bottom: 1px solid transparent;
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.site-header.scrolled { background: var(--red); border-bottom-color: var(--red-deep); box-shadow: 0 6px 24px rgba(0,0,0,.25); }
.brand { display: flex; align-items: center; gap: .6rem; }
.brand img { height: 30px; width: auto; }
.nav { display: flex; align-items: center; gap: 1.9rem; }
.nav a {
  font-family: var(--font-sans); font-size: .9rem; font-weight: 500; color: #fff;
  transition: opacity var(--dur-fast); position: relative;
}
.nav a::after { content: ""; position: absolute; left: 0; bottom: -6px; height: 2px; width: 0; background: #fff; transition: width var(--dur-fast) var(--ease-out); }
.nav a:hover::after { width: 100%; }
.header-cta { display: flex; align-items: center; gap: 1rem; }
.header-cta .btn { padding: .55rem 1.2rem; font-size: .85rem; }
.nav-toggle { display: none; background: none; border: none; padding: 6px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: #fff; margin: 5px 0; transition: transform var(--dur-fast), opacity var(--dur-fast); }

/* Mobile drawer */
.drawer-backdrop { position: fixed; inset: 0; z-index: 55; background: rgba(18,17,16,.55); backdrop-filter: blur(4px); opacity: 0; visibility: hidden; transition: opacity var(--dur-base); }
.drawer-backdrop.open { opacity: 1; visibility: visible; }
.drawer {
  position: fixed; top: 0; right: 0; z-index: 56; height: 100%; width: min(82vw, 340px);
  background: var(--red); padding: calc(var(--header-h) + 12px) 32px 32px;
  transform: translateX(100%); visibility: hidden;
  transition: transform var(--dur-base) var(--ease-out), visibility var(--dur-base);
  display: flex; flex-direction: column; gap: 1.25rem;
}
.drawer.open { transform: translateX(0); visibility: visible; }
.drawer a:not(.btn) { font-family: var(--font-display); font-size: 1.6rem; color: #fff; font-weight: 700; }
.drawer .btn { margin-top: 1rem; }
.drawer-close { position: absolute; top: 20px; right: 24px; background: none; border: none; color: #fff; font-size: 30px; line-height: 1; }

/* =====================================================================
   HERO — full red field
   ===================================================================== */
.hero { background: var(--red); color: #fff; padding-top: calc(var(--header-h) + clamp(28px, 5vw, 72px)); padding-bottom: clamp(40px, 6vw, 90px); }
.hero .wrap { display: grid; grid-template-columns: 1.08fr .92fr; gap: clamp(28px, 5vw, 72px); align-items: center; }
.hero__qmark { top: -6%; left: 48%; width: min(58vw, 720px); opacity: .12; }
.hero .eyebrow { color: #fff; }
.hero__wordmark { width: min(100%, 470px); margin: 20px 0 0; }
.hero__title-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.hero__lead {
  font-family: var(--font-serif); font-size: clamp(1.15rem, 2.1vw, 1.45rem); line-height: 1.5;
  color: rgba(255,255,255,.92); max-width: 34ch; margin-top: 1.6rem; font-weight: 300;
}
.hero__cta { display: flex; gap: .8rem; margin-top: 2rem; flex-wrap: wrap; }
.hero__meta { display: flex; gap: 1.7rem; margin-top: 2.4rem; font-family: var(--font-sans); font-size: .82rem; color: rgba(255,255,255,.9); flex-wrap: wrap; }
.hero__meta strong { color: #fff; font-weight: 700; }
.hero__figure { position: relative; display: flex; justify-content: center; align-items: center; }
.hero__figure img {
  position: relative; z-index: 1; width: min(94%, 460px);
  filter: drop-shadow(0 30px 55px rgba(0,0,0,.45));
}
.hero__figure .qmark-float { position: absolute; right: 2%; bottom: -8%; width: 110px; opacity: .9; z-index: 0; }

/* =====================================================================
   PREGUNTAS — black field
   ===================================================================== */
.preguntas { background: var(--black); color: var(--on-black); }
.preguntas__qmark { top: 50%; left: -8%; width: min(70vw, 900px); transform: translateY(-50%); opacity: .06; }
.preguntas .eyebrow { color: var(--red); }
.preguntas__intro { max-width: 30ch; }
.preguntas h2 { font-size: clamp(2rem, 4vw, 3.25rem); color: #fff; margin-top: .8rem; }
.preguntas__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0; margin-top: clamp(32px, 4vw, 56px); border-top: 1px solid var(--line-ink); }
.pregunta {
  padding: clamp(28px, 3.4vw, 46px) clamp(20px, 2.5vw, 40px) clamp(28px, 3.4vw, 46px) 0;
  border-bottom: 1px solid var(--line-ink); position: relative;
  display: flex; gap: 1.1rem; align-items: flex-start;
}
.pregunta:nth-child(odd) { border-right: 1px solid var(--line-ink); padding-right: clamp(28px, 3vw, 52px); }
.pregunta:nth-child(even) { padding-left: clamp(20px, 2.5vw, 40px); }
.pregunta__n { font-family: var(--font-sans); font-size: .8rem; font-weight: 600; color: var(--red); padding-top: .55rem; }
.pregunta p {
  font-family: var(--font-display); font-weight: 400; font-size: clamp(1.35rem, 2.5vw, 2rem);
  line-height: 1.18; color: #fff;
}
.pregunta:hover p { color: #fff; }

/* =====================================================================
   SINOPSIS — white field
   ===================================================================== */
.sinopsis { background: #fff; color: var(--ink); }
.sinopsis__qmark { top: -12%; right: -6%; width: min(46vw, 520px); opacity: .05; }
.sinopsis .wrap { display: grid; grid-template-columns: .85fr 1.15fr; gap: clamp(32px, 5vw, 80px); align-items: start; }
.sinopsis .eyebrow { color: var(--red); }
.sinopsis h2 { font-size: clamp(2.1rem, 4vw, 3.4rem); margin: .7rem 0 0; }
.sinopsis__body p { font-family: var(--font-serif); font-size: clamp(1.05rem, 1.5vw, 1.2rem); line-height: 1.7; color: var(--ink-soft); }
.sinopsis__body p + p { margin-top: 1.1rem; }
.pullquote {
  margin: 2rem 0 0; background: var(--red); color: #fff; border-radius: var(--radius-lg);
  padding: clamp(28px, 3.5vw, 44px); position: relative; overflow: hidden;
}
.pullquote__mark { position: absolute; right: -4%; bottom: -30%; width: 55%; opacity: .14; pointer-events: none; }
.pullquote p { font-family: var(--font-display); font-weight: 400; font-size: clamp(1.4rem, 2.4vw, 2rem); line-height: 1.22; position: relative; color: #fff; }
.sinopsis__cta { margin-top: 1.6rem; }
.sinopsis__facts { margin-top: 1.6rem; display: flex; gap: 1.6rem; flex-wrap: wrap; font-family: var(--font-sans); font-size: .82rem; color: var(--ink-faint); }
.sinopsis__facts strong { color: var(--ink); }

/* =====================================================================
   PRÁCTICAS — red field, white QR cards
   ===================================================================== */
.practicas { background: var(--red); color: #fff; }
.practicas__qmark { bottom: -14%; right: -6%; width: min(52vw, 620px); opacity: .10; }
.practicas__head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; flex-wrap: wrap; margin-bottom: clamp(32px, 4vw, 54px); }
.practicas .eyebrow { color: #fff; }
.practicas h2 { font-size: clamp(2.1rem, 4vw, 3.4rem); color: #fff; margin-top: .7rem; max-width: 16ch; }
.practicas__intro { font-family: var(--font-serif); font-size: 1.05rem; color: #fff; max-width: 36ch; }
.chapters { display: grid; gap: 18px; }
.chapter {
  background: #fff; color: var(--ink); border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-md);
}
.chapter__head { display: flex; align-items: baseline; gap: .9rem; padding: clamp(20px, 2.4vw, 30px) clamp(20px, 2.4vw, 32px) 0; }
.chapter__num { font-family: var(--font-display); font-weight: 700; font-size: 1.6rem; color: var(--red); line-height: 1; }
.chapter__title { font-family: var(--font-display); font-weight: 700; font-size: clamp(1.25rem, 2vw, 1.6rem); color: var(--ink); }
.chapter__practices { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 14px; padding: clamp(16px, 2vw, 24px) clamp(20px, 2.4vw, 32px) clamp(22px, 2.4vw, 30px); }
.practice { text-align: center; }
.practice__qr {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-md);
  padding: 8px; width: 100%; aspect-ratio: 1 / 1; cursor: zoom-in;
  transition: border-color var(--dur-fast), transform var(--dur-fast);
}
.practice__qr:hover { border-color: var(--red); transform: translateY(-2px); }
.practice__qr img { width: 100%; height: 100%; object-fit: contain; }
.practice__name { display: block; margin-top: .6rem; font-family: var(--font-sans); font-size: .82rem; font-weight: 500; color: var(--ink-soft); line-height: 1.3; }
.practicas__note { margin-top: 1.6rem; font-family: var(--font-sans); font-size: .85rem; color: rgba(255,255,255,.8); display: flex; align-items: center; gap: .5rem; }

/* =====================================================================
   AUTOR — white field
   ===================================================================== */
.autor { background: #fff; color: var(--ink); }
.autor .wrap { display: grid; grid-template-columns: .82fr 1.18fr; gap: clamp(32px, 5vw, 76px); align-items: center; }
.autor__figure { position: relative; }
.autor__figure::before { content: ""; position: absolute; inset: 16px -16px -16px 16px; background: var(--red); border-radius: var(--radius-lg); }
.autor__figure img { position: relative; width: 100%; border-radius: var(--radius-lg); box-shadow: var(--shadow-md); }
.autor .eyebrow { color: var(--red); }
.autor h2 { font-size: clamp(2rem, 3.6vw, 3rem); margin: .6rem 0 0; }
.autor__body p { font-family: var(--font-serif); font-size: 1.05rem; line-height: 1.68; color: var(--ink-soft); margin-top: 1rem; }
.autor__body p em { color: var(--ink); font-style: italic; }
.autor__quote { margin: 1.6rem 0 0; padding-left: 1.25rem; border-left: 3px solid var(--red); font-family: var(--font-display); font-style: italic; font-size: 1.4rem; color: var(--ink); }
.autor__cta { margin-top: 1.8rem; }

/* =====================================================================
   COMPRAR — black field
   ===================================================================== */
.comprar { background: var(--black); color: #fff; text-align: center; }
.comprar__qmark { top: 50%; left: 50%; transform: translate(-50%, -50%); width: min(60vw, 640px); opacity: .06; }
.comprar .eyebrow { color: var(--red); }
.comprar h2 { font-size: clamp(2.2rem, 4.5vw, 3.6rem); color: #fff; margin: .7rem auto 0; max-width: 18ch; }
.comprar__tag { font-family: var(--font-serif); color: rgba(255,255,255,.82); margin: 1rem auto 0; max-width: 42ch; font-size: 1.08rem; }
.stores { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 14px; margin-top: 2.2rem; }
.store {
  display: inline-flex; align-items: center; justify-content: center;
  background: #fff; padding: .8rem 1.5rem; border-radius: var(--radius-pill);
  box-shadow: 0 2px 10px rgba(0,0,0,.16);
  transition: transform var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast);
}
.store:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.store:active { transform: translateY(-1px); }
.store__logo { height: 26px; width: auto; display: block; }
.comprar__isbn { margin-top: 1.8rem; font-family: var(--font-sans); font-size: .78rem; letter-spacing: .05em; color: rgba(255,255,255,.55); }

/* =====================================================================
   FOOTER
   ===================================================================== */
.site-footer { background: #0B0A0A; color: rgba(255,255,255,.72); border-top: 1px solid var(--line-ink); }
.site-footer .wrap { padding-block: clamp(40px, 6vw, 72px); display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; }
.footer__brand img { height: 36px; margin-bottom: 1rem; }
.footer__brand p { font-family: var(--font-serif); font-size: .95rem; max-width: 34ch; color: rgba(255,255,255,.6); }
.footer__col h3 { font-family: var(--font-sans); font-size: .75rem; font-weight: 600; text-transform: uppercase; letter-spacing: var(--tracking-label); color: rgba(255,255,255,.72); margin-bottom: 1rem; }
.footer__col a { display: block; font-family: var(--font-sans); font-size: .92rem; color: rgba(255,255,255,.8); padding: .28rem 0; transition: color var(--dur-fast); }
.footer__col a:hover { color: var(--red); }
.footer__espasa { display: flex; align-items: center; gap: .6rem; margin-top: 1.4rem; }
.footer__espasa img { height: 34px; opacity: .85; filter: brightness(0) invert(1); }
.footer__bottom { border-top: 1px solid var(--line-ink); }
.footer__bottom .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-block: 20px; font-family: var(--font-sans); font-size: .78rem; color: rgba(255,255,255,.45); }

/* =====================================================================
   LIGHTBOX (QR zoom) + EXCERPT MODAL
   ===================================================================== */
.overlay { position: fixed; inset: 0; z-index: 80; background: rgba(10,9,9,.82); backdrop-filter: blur(6px); display: flex; align-items: center; justify-content: center; padding: 24px; opacity: 0; visibility: hidden; transition: opacity var(--dur-base); }
.overlay.open { opacity: 1; visibility: visible; }
.lightbox__inner { background: #fff; border-radius: var(--radius-lg); padding: 22px; max-width: 420px; width: 100%; text-align: center; box-shadow: var(--shadow-lg); }
.lightbox__inner img { width: 100%; border-radius: var(--radius-md); }
.lightbox__inner .cap { font-family: var(--font-sans); font-weight: 600; color: var(--ink); margin-top: 14px; font-size: 1rem; }
.lightbox__inner .sub { font-family: var(--font-sans); font-size: .82rem; color: var(--ink-faint); margin-top: 4px; }
.modal { background: #fff; border-radius: var(--radius-lg); max-width: 620px; width: 100%; padding: clamp(28px, 4vw, 48px); max-height: 86vh; overflow: auto; box-shadow: var(--shadow-lg); }
.modal__top { display: flex; justify-content: space-between; align-items: center; }
.modal .eyebrow { color: var(--red); }
.modal h3 { font-size: clamp(1.6rem, 3vw, 2rem); margin: .5rem 0 0; }
.modal__rule { height: 1px; background: var(--line); margin: 1.2rem 0; position: relative; }
.modal__rule::after { content: "?"; position: absolute; left: 50%; top: 50%; transform: translate(-50%,-50%); background: #fff; padding: 0 12px; font-family: var(--font-display); color: var(--red); font-size: 1.3rem; }
.modal p { font-family: var(--font-serif); font-size: 1.08rem; line-height: 1.72; color: var(--ink-soft); }
.modal p + p { margin-top: 1rem; }
.modal__close, .lightbox__close { background: none; border: none; font-size: 26px; line-height: 1; color: var(--ink-soft); }
.modal__cta { margin-top: 1.6rem; }

/* =====================================================================
   RESPONSIVE
   ===================================================================== */
@media (max-width: 900px) {
  :root { --header-h: 60px; }
  .nav, .header-cta .btn { display: none; }
  .nav-toggle { display: block; }
  .hero .wrap, .sinopsis .wrap, .autor .wrap { grid-template-columns: 1fr; }
  .hero__figure { order: -1; margin-bottom: 8px; }
  .hero__figure img { width: min(70%, 320px); }
  .site-footer .wrap { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 620px) {
  .preguntas__grid { grid-template-columns: 1fr; }
  .pregunta, .pregunta:nth-child(odd), .pregunta:nth-child(even) { border-right: none; padding-left: 0; padding-right: 0; }
  .chapter__practices { grid-template-columns: 1fr 1fr; }
  .hero__cta .btn, .sinopsis__cta .btn, .autor__cta .btn { width: 100%; }
  .hero__cta, .sinopsis__cta { width: 100%; }
}

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s var(--ease-out), transform .6s var(--ease-out); }
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
  /* Nunca ocultar contenido si no hay animación */
  .reveal { opacity: 1; transform: none; }
}

/* =====================================================================
   PÁGINA CONFERENCIAS  (reutiliza tokens, hero rojo y patrón tarjeta)
   ===================================================================== */

/* Nav: estado activo (subrayado permanente) */
.nav a[aria-current="page"]::after { width: 100%; }
.drawer a[aria-current="page"] { color: #fff; text-decoration: underline; text-underline-offset: 6px; }

/* Cabecera de página — mismo lenguaje que el hero del libro (rojo pleno) */
.page-hero { background: var(--red); color: #fff;
  padding-top: calc(var(--header-h) + clamp(40px, 7vw, 96px));
  padding-bottom: clamp(40px, 7vw, 90px); }
.page-hero .eyebrow { color: #fff; }
.page-hero h1 { font-size: clamp(2.8rem, 7.5vw, 5.5rem); color: #fff; margin-top: 18px; }
.page-hero__lead { font-family: var(--font-serif); font-weight: 300;
  font-size: clamp(1.15rem, 2.1vw, 1.45rem); line-height: 1.5;
  color: rgba(255,255,255,.92); max-width: 40ch; margin-top: 1.4rem; }
.page-hero__qmark { top: -8%; right: -6%; width: min(52vw, 620px); opacity: .12; }

/* Umbrella "Conferencias" — campo rojo, tarjetas blancas (como Prácticas) */
.keynotes { background: var(--red); color: #fff; }
.keynotes__qmark { bottom: -14%; left: -6%; width: min(50vw, 600px); opacity: .10; }
.keynotes__head { max-width: 42ch; margin-bottom: clamp(28px, 4vw, 48px); }
.keynotes .eyebrow { color: #fff; }
.keynotes h2 { color: #fff; font-size: clamp(2rem, 4vw, 3rem); margin-top: .6rem; }

.keynote-list { display: grid; gap: clamp(20px, 3vw, 32px); }
@media (min-width: 860px) { .keynote-list { grid-template-columns: 1fr 1fr; align-items: start; } }
.keynote { background: #fff; color: var(--ink); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md); overflow: hidden; }
.keynote__body { padding: clamp(26px, 3.4vw, 48px); display: flex; flex-direction: column; }
.keynote__hook, .keynote__text { max-width: 64ch; }
.keynote__badge { align-self: flex-start; display: inline-block; margin-bottom: 1rem;
  font-family: var(--font-sans); font-size: .7rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: var(--tracking-label); color: #fff; background: var(--red);
  padding: .34rem .74rem; border-radius: var(--radius-pill); }
.keynote__head { display: flex; align-items: baseline; gap: .85rem; }
.keynote__num { font-family: var(--font-display); font-weight: 700; font-size: 2.4rem; color: var(--red); line-height: 1; }
.keynote__title { font-family: var(--font-display); font-weight: 700; font-size: clamp(1.5rem, 2.4vw, 2rem); color: var(--ink); }
.keynote__hook { font-family: var(--font-display); font-weight: 400; font-style: italic;
  font-size: clamp(1.2rem, 1.9vw, 1.5rem); line-height: 1.25; color: var(--ink); margin-top: 1rem; }
.keynote__text { margin-top: 1.1rem; }
.keynote__text p { font-family: var(--font-serif); font-size: 1.02rem; line-height: 1.65; color: var(--ink-soft); }
.keynote__text p + p { margin-top: .9rem; }
.keynote__foot { margin-top: auto; padding-top: 1.5rem; }
.keynote__meta { font-family: var(--font-sans); font-size: .8rem; color: var(--ink-faint); letter-spacing: .02em; }
.keynote__cta { margin-top: 1rem; display: flex; gap: 1.1rem; align-items: center; flex-wrap: wrap; }
.keynote__booklink { font-family: var(--font-sans); font-size: .9rem; font-weight: 600; color: var(--red-deep); transition: color var(--dur-fast); }
.keynote__booklink:hover { color: var(--red); text-decoration: underline; text-underline-offset: 4px; }

/* Reel / vídeo (placeholder) — campo negro */
.reel { background: var(--black); color: #fff; text-align: center; }
.reel .eyebrow { color: var(--red); }
.reel h2 { color: #fff; font-size: clamp(1.8rem, 3.5vw, 2.6rem); margin: .6rem auto 0; max-width: 24ch; }
.reel__frame { margin: clamp(24px, 4vw, 40px) auto 0; max-width: 900px; aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--line-ink); }
.reel__frame img { width: 100%; height: 100%; object-fit: cover; }

/* Testimonios + logos (placeholder) — campo blanco */
.testimonios { background: #fff; color: var(--ink); }
.testimonios .eyebrow { color: var(--red); }
.testimonios h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); margin-top: .6rem; }
.testimonios__note { font-family: var(--font-sans); font-size: .85rem; color: var(--ink-faint); margin-top: .8rem; }
.testi-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; margin-top: clamp(24px, 4vw, 40px); }
.testi { border: 1px dashed var(--line); border-radius: var(--radius-lg); padding: clamp(20px, 2.4vw, 28px); background: #fff; }
.testi__ph { font-family: var(--font-sans); font-size: .7rem; text-transform: uppercase; letter-spacing: var(--tracking-label); color: var(--ink-faint); }
.testi__body { font-family: var(--font-serif); font-style: italic; color: var(--ink-faint); margin-top: .7rem; font-size: 1.02rem; }
.logos { margin-top: clamp(28px, 4vw, 44px); }
.logos__ph-label { font-family: var(--font-sans); font-size: .7rem; text-transform: uppercase; letter-spacing: var(--tracking-label); color: var(--ink-faint); }
.logos__row { display: flex; flex-wrap: wrap; gap: 16px; margin-top: .9rem; }
.logo-ph { width: 130px; height: 52px; border: 1px dashed var(--line); border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center; font-family: var(--font-sans); font-size: .7rem; color: var(--ink-faint); }

/* Banda de contacto final — rojo */
.contact { background: var(--red); color: #fff; text-align: center; }
.contact__qmark { top: 50%; left: 50%; transform: translate(-50%, -50%); width: min(58vw, 620px); opacity: .10; }
.contact h2 { color: #fff; font-size: clamp(2rem, 4.2vw, 3.2rem); max-width: 20ch; margin: 0 auto; }
.contact p { font-family: var(--font-serif); color: rgba(255,255,255,.92); margin: 1rem auto 0; max-width: 46ch; font-size: 1.08rem; }
.contact__cta { margin-top: 1.9rem; }

@media (max-width: 620px) {
  .keynote__cta .btn { width: 100%; }
  .keynote__cta { width: 100%; }
}

/* =====================================================================
   MÓDULOS DE MARKETING (contenido real del libro)
   ===================================================================== */

/* ---- Ideas que se subrayan (frases-imán) — campo rojo ---- */
.ideas { background: var(--red); color: #fff; }
.ideas__qmark { top: -10%; right: -6%; width: min(48vw, 560px); opacity: .10; }
.ideas .eyebrow { color: #fff; }
.ideas h2 { color: #fff; font-size: clamp(2rem, 4vw, 3.2rem); margin-top: .6rem; max-width: 18ch; }
.ideas__grid { margin-top: clamp(28px, 4vw, 52px); column-count: 2; column-gap: clamp(28px, 4vw, 60px); }
.frase { break-inside: avoid; padding: clamp(18px, 2vw, 24px) 0; border-top: 1px solid rgba(255,255,255,.28); }
.frase:first-child { border-top: none; padding-top: 0; }
.frase p { font-family: var(--font-display); font-weight: 400; font-size: clamp(1.3rem, 2.1vw, 1.85rem); line-height: 1.2; color: #fff; }
.frase cite { display: block; margin-top: .6rem; font-family: var(--font-sans); font-size: .72rem; font-style: normal; letter-spacing: .04em; color: rgba(255,255,255,.72); text-transform: uppercase; }

/* ---- Qué aprenderás (por capítulo) + cuña IA — campo negro ---- */
.aprenderas { background: var(--black); color: var(--on-black); }
.aprenderas__qmark { bottom: -12%; left: -7%; width: min(56vw, 660px); opacity: .05; }
.aprenderas .eyebrow { color: var(--red); }
.aprenderas h2 { color: #fff; font-size: clamp(2rem, 4vw, 3.2rem); margin-top: .6rem; max-width: 20ch; }
.aprenderas__grid { margin-top: clamp(28px, 4vw, 48px); display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line-ink); }
.learn { display: flex; gap: 1rem; align-items: flex-start; padding: clamp(18px, 2vw, 26px) 0; border-bottom: 1px solid var(--line-ink); }
.learn:nth-child(odd) { border-right: 1px solid var(--line-ink); padding-right: clamp(24px, 3vw, 48px); }
.learn:nth-child(even) { padding-left: clamp(24px, 3vw, 48px); }
.learn__n { font-family: var(--font-display); font-weight: 700; color: var(--red); font-size: 1.35rem; line-height: 1.05; min-width: 2.2ch; }
.learn__t { font-family: var(--font-display); font-weight: 700; color: #fff; font-size: 1.05rem; line-height: 1.15; margin-bottom: .3rem; }
.learn__b { font-family: var(--font-serif); color: rgba(255,255,255,.72); font-size: .95rem; line-height: 1.5; }
.wedge { margin-top: clamp(28px, 4vw, 44px); background: var(--red); border-radius: var(--radius-lg); padding: clamp(24px, 3.2vw, 42px); position: relative; overflow: hidden; }
.wedge__mark { position: absolute; right: -3%; bottom: -34%; width: 46%; opacity: .14; pointer-events: none; }
.wedge .eyebrow { color: #fff; }
.wedge p { font-family: var(--font-display); font-weight: 400; color: #fff; font-size: clamp(1.3rem, 2.2vw, 1.9rem); line-height: 1.25; margin-top: .6rem; position: relative; max-width: 30ch; }
.wedge cite { display: block; margin-top: .8rem; font-family: var(--font-sans); font-size: .72rem; font-style: normal; letter-spacing: .04em; color: rgba(255,255,255,.85); text-transform: uppercase; position: relative; }

/* ---- Qué te llevas (marcos con nombre) — campo blanco ---- */
.metodos { background: #fff; color: var(--ink); }
.metodos__qmark { top: -12%; right: -6%; width: min(42vw, 480px); opacity: .05; }
.metodos .eyebrow { color: var(--red); }
.metodos h2 { font-size: clamp(2rem, 4vw, 3.2rem); margin-top: .6rem; max-width: 20ch; }
.metodos__intro { font-family: var(--font-serif); color: var(--ink-soft); font-size: 1.05rem; max-width: 52ch; margin-top: 1rem; }
.metodos__grid { margin-top: clamp(28px, 4vw, 48px); display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.metodo { border: 1px solid var(--line); border-radius: var(--radius-lg); padding: clamp(22px, 2.6vw, 34px); background: #fff;
  transition: box-shadow var(--dur-fast), transform var(--dur-fast); }
.metodo:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.metodo__name { font-family: var(--font-display); font-weight: 700; color: var(--red); font-size: clamp(1.7rem, 2.8vw, 2.3rem); line-height: 1.05; letter-spacing: .01em; }
.metodo__name--sm { font-size: clamp(1.3rem, 2vw, 1.65rem); }
.metodo__use { font-family: var(--font-sans); font-size: .74rem; font-weight: 600; text-transform: uppercase; letter-spacing: var(--tracking-label); color: var(--ink-faint); margin-top: .5rem; }
.metodo__steps { margin-top: 1.1rem; display: flex; flex-direction: column; gap: .55rem; }
.metodo__step { font-family: var(--font-serif); color: var(--ink-soft); font-size: 1rem; line-height: 1.4; }
.metodo__step b { color: var(--red); font-weight: 700; }

@media (max-width: 760px) {
  .metodos__grid { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .ideas__grid { column-count: 1; }
  .aprenderas__grid { grid-template-columns: 1fr; }
  .learn:nth-child(odd) { border-right: none; padding-right: 0; }
  .learn:nth-child(even) { padding-left: 0; }
}