:root {
  --paper: #f1eee7;
  --paper-light: #faf8f3;
  --paper-blue: #e6edf2;
  --ink: #13191f;
  --ink-soft: #46515b;
  --night: #07111c;
  --night-soft: #0c1d2d;
  --white: #f9fbfc;
  --white-soft: #aebbc6;
  --blue: #087ee8;
  --blue-bright: #58baff;
  --neo: #a8d729;
  --line: rgba(19, 25, 31, 0.18);
  --line-dark: rgba(230, 242, 251, 0.19);
  --shadow: 0 2.5rem 5rem rgba(4, 15, 25, 0.2);
  --container: 80rem;
  --reading: 67ch;
  --serif: "DM Serif Display", Georgia, serif;
  --sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "DM Mono", "SFMono-Regular", Consolas, monospace;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 5.5rem; }

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.72;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.menu-open { overflow: hidden; }
img { display: block; max-width: 100%; }
.book-image { display: block; width: 100%; max-width: 100%; height: auto; object-fit: contain; object-position: center; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 4px; }
::selection { background: var(--blue); color: #fff; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 1rem;
  left: 1rem;
  padding: 0.75rem 1rem;
  transform: translateY(-180%);
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
  transition: transform 160ms ease;
}

.skip-link:focus { transform: translateY(0); }
.container { width: min(calc(100% - 3rem), var(--container)); margin-inline: auto; }
.narrow { max-width: 69rem; }
.section { position: relative; padding-block: clamp(5.5rem, 10vw, 10rem); }
.section--light { background: var(--paper-light); color: var(--ink); }
.section--deep { background: var(--night); color: var(--white); }

.section-kicker,
.eyebrow {
  margin: 0 0 1.3rem;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  line-height: 1.4;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }
h1, h2 { font-family: var(--serif); font-weight: 400; letter-spacing: -0.035em; }
h1 { max-width: 9ch; margin-bottom: 1.25rem; font-size: clamp(4rem, 9vw, 8.4rem); line-height: 0.82; }
h1 em { display: block; color: var(--blue-bright); font-weight: 400; }
h2 { max-width: 18ch; margin-bottom: 2.2rem; font-size: clamp(2.5rem, 5vw, 5.25rem); line-height: 0.98; }
h3 { margin-bottom: 0.75rem; font-size: 1.2rem; line-height: 1.3; }
.prose { max-width: var(--reading); color: var(--ink-soft); }
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--ink); }

.two-columns { column-count: 2; column-gap: clamp(2.5rem, 7vw, 6rem); column-rule: 1px solid var(--line); }
.two-columns p { break-inside: avoid; }
.two-columns p:first-child::first-letter {
  float: left;
  margin: 0.08em 0.12em 0 0;
  color: var(--blue);
  font-family: var(--serif);
  font-size: 5.7rem;
  line-height: 0.68;
}

.section-heading { max-width: 57rem; margin-bottom: clamp(3.5rem, 7vw, 6.5rem); }
.section-heading--center { margin-inline: auto; text-align: center; }
.section-heading--center h2 { margin-inline: auto; }
.section-heading--center > p:last-child { max-width: 58ch; margin-inline: auto; color: var(--ink-soft); }
.button-row { display: flex; flex-wrap: wrap; gap: 0.75rem; align-items: center; }
.button-row--center { justify-content: center; }

.button {
  display: inline-flex;
  min-height: 3.25rem;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--blue);
  border-radius: 0;
  padding: 0.85rem 1.5rem;
  background: var(--blue);
  color: #fff;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  text-transform: uppercase;
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease, transform 180ms ease;
}

.button::after { margin-left: 1rem; content: "↗"; font-size: 0.9rem; }
.button:hover { border-color: #006dcf; background: #006dcf; transform: translateY(-2px); }
.button--ghost { border-color: rgba(255, 255, 255, 0.35); background: transparent; color: var(--white); }
.button--ghost:hover { border-color: var(--white); background: var(--white); color: var(--night); }
.button--small { min-height: 2.7rem; padding: 0.7rem 1rem; font-size: 0.62rem; }

.site-header {
  position: fixed;
  z-index: 100;
  inset: 0 0 auto;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  color: var(--white);
  transition: background-color 180ms ease, border-color 180ms ease, color 180ms ease;
}

.site-header.is-scrolled {
  border-color: var(--line);
  background: rgba(241, 238, 231, 0.95);
  color: var(--ink);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
}

.nav-shell { display: flex; min-height: 5rem; align-items: center; justify-content: space-between; gap: 2rem; }
.brand { display: flex; align-items: baseline; gap: 0.8rem; text-decoration: none; }
.brand__title { font-family: var(--serif); font-size: 1.25rem; line-height: 1; }
.brand__edition { font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.14em; opacity: 0.62; text-transform: uppercase; }
.primary-nav { display: flex; align-items: center; gap: clamp(1rem, 2vw, 2rem); }
.primary-nav > a { position: relative; font-family: var(--mono); font-size: 0.64rem; letter-spacing: 0.09em; text-decoration: none; text-transform: uppercase; }
.primary-nav > a::after { position: absolute; right: 0; bottom: -0.35rem; left: 0; height: 1px; background: currentColor; content: ""; transform: scaleX(0); transform-origin: right; transition: transform 180ms ease; }
.primary-nav > a:hover::after { transform: scaleX(1); transform-origin: left; }

.menu-toggle {
  position: relative;
  display: none;
  width: 3rem;
  height: 3rem;
  align-items: center;
  justify-content: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  background: transparent;
  color: inherit;
  cursor: pointer;
}

.menu-toggle span[aria-hidden] { position: absolute; width: 1.15rem; height: 1px; background: currentColor; transition: transform 180ms ease; }
.menu-toggle span[aria-hidden]:last-child { transform: translateY(0.35rem); }
.menu-toggle[aria-expanded="true"] span[aria-hidden]:first-of-type { transform: rotate(45deg); }
.menu-toggle[aria-expanded="true"] span[aria-hidden]:last-child { transform: rotate(-45deg); }

.hero {
  position: relative;
  display: grid;
  min-height: 100svh;
  align-items: center;
  overflow: hidden;
  padding-block: 9rem 6rem;
  background: var(--night);
  color: var(--white);
}

.hero::after {
  position: absolute;
  right: -6vw;
  bottom: -10vw;
  width: 35vw;
  min-width: 22rem;
  border: 1px solid rgba(88, 186, 255, 0.2);
  border-radius: 50%;
  aspect-ratio: 1;
  content: "";
  box-shadow: 0 0 0 5vw rgba(88, 186, 255, 0.025), 0 0 0 10vw rgba(88, 186, 255, 0.02);
}

.hero-grid, .final-cta__grid { position: absolute; inset: 0; background-image: linear-gradient(90deg, transparent calc(50% - 0.5px), rgba(255, 255, 255, 0.08) 50%, transparent calc(50% + 0.5px)); background-size: 25% 100%; pointer-events: none; }
.hero-layout { position: relative; z-index: 2; display: grid; align-items: center; gap: clamp(3rem, 7vw, 8rem); grid-template-columns: minmax(0, 1.05fr) minmax(20rem, 0.78fr); }
.hero-copy { position: relative; }
.hero-meta { display: flex; justify-content: space-between; gap: 1rem; max-width: 43rem; margin-bottom: clamp(2rem, 4vw, 4rem); border-top: 1px solid rgba(255, 255, 255, 0.28); padding-top: 0.85rem; }
.hero-meta p { margin: 0; color: var(--white-soft); font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.14em; text-transform: uppercase; }
.hero-meta .eyebrow { color: var(--blue-bright); }
.hero-subtitle { margin-bottom: 1.8rem; color: var(--white); font-family: var(--serif); font-size: clamp(1.35rem, 2.2vw, 2rem); font-style: italic; line-height: 1.2; }
.hero-intro { max-width: 62ch; margin-bottom: 2.5rem; padding-left: clamp(1rem, 3vw, 2rem); border-left: 1px solid rgba(88, 186, 255, 0.65); color: var(--white-soft); font-size: clamp(0.95rem, 1.15vw, 1.08rem); }
.hero-intro p:last-child { margin-bottom: 0; }
.hero-book { position: relative; width: min(100%, 31rem); margin: 0 auto; }
.hero-book__issue { position: absolute; z-index: -1; top: -3.5rem; right: -1rem; color: transparent; font-family: var(--serif); font-size: clamp(9rem, 17vw, 15rem); line-height: 1; -webkit-text-stroke: 1px rgba(88, 186, 255, 0.26); }
.hero-book__halo { position: absolute; inset: 12% 5%; background: rgba(0, 116, 235, 0.3); filter: blur(5rem); }
.hero-book img { position: relative; width: 100%; height: auto; filter: drop-shadow(0 2.8rem 3.2rem rgba(0, 0, 0, 0.48)); transform: rotate(1.5deg); }
.hero-book figcaption { position: absolute; right: -1.5rem; bottom: 1rem; border-top: 1px solid rgba(255, 255, 255, 0.45); padding-top: 0.7rem; color: var(--white-soft); font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.12em; text-transform: uppercase; }
.hero-book figcaption span { color: var(--neo); font-weight: 700; }
.scroll-cue { position: absolute; bottom: 1.5rem; left: 50%; z-index: 3; display: flex; align-items: center; gap: 0.7rem; color: var(--white-soft); font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.14em; text-decoration: none; text-transform: uppercase; transform: translateX(-50%); }

#punto-partida::before { position: absolute; top: clamp(2rem, 5vw, 4rem); right: max(1.5rem, calc((100% - var(--container)) / 2)); color: transparent; content: "01"; font-family: var(--serif); font-size: clamp(5rem, 12vw, 11rem); line-height: 1; -webkit-text-stroke: 1px rgba(19, 25, 31, 0.11); }
.campaign-section { overflow: hidden; background: var(--night); color: var(--white); }
.campaign-section::before { position: absolute; top: -7rem; left: -7rem; width: 25rem; border: 1px solid rgba(88, 186, 255, 0.14); border-radius: 50%; aspect-ratio: 1; box-shadow: 0 0 0 5rem rgba(88, 186, 255, 0.02); content: ""; }
.campaign-heading { position: relative; display: grid; align-items: end; gap: clamp(2rem, 8vw, 8rem); margin-bottom: clamp(3rem, 7vw, 6rem); grid-template-columns: minmax(0, 1.25fr) minmax(17rem, 0.6fr); }
.campaign-heading .section-kicker { color: var(--blue-bright); }
.campaign-heading h2 { max-width: 17ch; margin-bottom: 0; }
.campaign-heading > p { margin-bottom: 0.4rem; padding-top: 1rem; border-top: 1px solid var(--line-dark); color: var(--white-soft); }
.campaign-sequence { position: relative; display: grid; gap: clamp(1rem, 2vw, 1.75rem); margin: 0; padding: 0; grid-template-columns: repeat(3, minmax(0, 1fr)); list-style: none; }
.campaign-sequence li { min-width: 0; }
.campaign-sequence figure { margin: 0; }
.campaign-sequence img { width: 100%; height: auto; border: 1px solid rgba(88, 186, 255, 0.18); background: #020a13; box-shadow: 0 2rem 5rem rgba(0, 0, 0, 0.28); }
.campaign-sequence figcaption { display: flex; justify-content: space-between; gap: 1rem; margin-top: 1rem; color: var(--white-soft); font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.11em; text-transform: uppercase; }
.campaign-sequence figcaption span { color: var(--blue-bright); }
.method-section { background: var(--paper-blue); color: var(--ink); }
.method-layout { display: grid; align-items: center; gap: clamp(3.5rem, 9vw, 9rem); grid-template-columns: minmax(18rem, 0.65fr) minmax(0, 1.1fr); }
.method-mark { position: relative; overflow: hidden; border-radius: 50%; aspect-ratio: 1; background: var(--paper-light); box-shadow: inset 0 0 0 1px var(--line); }
.method-mark::before, .method-mark::after { position: absolute; border: 1px solid rgba(8, 126, 232, 0.18); border-radius: 50%; content: ""; inset: 9%; }
.method-mark::after { inset: 22%; }
.method-mark img { position: relative; z-index: 1; width: 100%; height: 100%; object-fit: contain; mix-blend-mode: multiply; transform: scale(1.14); }
.statement { position: relative; max-width: 72rem; margin: clamp(5rem, 11vw, 10rem) auto 0; padding: 3rem 0 0 16%; border-top: 1px solid var(--line); }
.statement::before { position: absolute; top: 2rem; left: 0; color: var(--blue); content: "“"; font-family: var(--serif); font-size: 7rem; line-height: 1; }
.statement p { margin: 0; color: var(--ink); font-family: var(--serif); font-size: clamp(2rem, 4vw, 4.2rem); font-style: italic; line-height: 1.08; }

.axes-section .section-kicker, .origin-section .section-kicker, .final-cta .section-kicker { color: var(--blue-bright); }
.axis-list { display: grid; margin: 0; padding: 0; border-top: 1px solid var(--line-dark); list-style: none; }
.axis-list li { display: grid; min-height: 10rem; align-items: center; gap: 2rem; border-bottom: 1px solid var(--line-dark); grid-template-columns: 5rem minmax(0, 1fr); transition: padding-left 220ms ease, background-color 220ms ease; }
.axis-list li:hover { padding-left: 1rem; background: rgba(88, 186, 255, 0.035); }
.axis-list li > span { color: var(--blue-bright); font-family: var(--mono); font-size: 0.68rem; }
.axis-list h3 { margin-bottom: 0.35rem; font-family: var(--serif); font-size: clamp(1.9rem, 3vw, 2.8rem); font-weight: 400; }
.axis-list p { max-width: 61ch; margin-bottom: 0; color: var(--white-soft); }

.book-section { overflow: hidden; background: var(--paper); color: var(--ink); }
.book-section::before { position: absolute; top: 6%; left: -5vw; color: rgba(8, 126, 232, 0.055); content: "LIBRO"; font-family: var(--serif); font-size: clamp(7rem, 20vw, 18rem); line-height: 1; writing-mode: vertical-rl; }
.book-story { position: relative; display: grid; align-items: center; gap: clamp(3rem, 8vw, 8rem); grid-template-columns: minmax(22rem, 0.9fr) minmax(0, 1fr); }
.book-composition { position: relative; min-height: 48rem; }
.book-composition img { position: absolute; width: min(78%, 27rem); height: auto; filter: drop-shadow(0 2rem 2.5rem rgba(4, 15, 25, 0.28)); }
.book-composition__front { z-index: 2; top: 0; left: 0; transform: rotate(-2deg); }
.book-composition__back { right: 0; bottom: 0; transform: rotate(3deg); }
.book-copy .prose { margin-bottom: 2rem; }
.check-list { display: grid; gap: 0; margin: 0 0 2.5rem; padding: 0; border-top: 1px solid var(--line); list-style: none; }
.check-list li { position: relative; padding: 0.8rem 0 0.8rem 2rem; border-bottom: 1px solid var(--line); color: var(--ink-soft); }
.check-list li::before { position: absolute; left: 0; color: var(--blue); content: "↳"; font-family: var(--mono); }

.book-gallery-section { border-top: 1px solid var(--line); }
.book-gallery { display: grid; max-width: 58rem; margin-inline: auto; gap: clamp(2rem, 6vw, 5rem); grid-template-columns: repeat(2, minmax(0, 1fr)); }
.book-gallery figure { margin: 0; }
.book-gallery figure:nth-child(2) { margin-top: clamp(2rem, 8vw, 7rem); }
.book-gallery img { width: 100%; height: auto; border: 1px solid rgba(19, 25, 31, 0.1); box-shadow: var(--shadow); }
.book-gallery figcaption { display: flex; align-items: center; gap: 0.8rem; margin-top: 1rem; color: var(--ink-soft); font-family: var(--mono); font-size: 0.64rem; letter-spacing: 0.14em; text-transform: uppercase; }
.book-gallery figcaption::before { width: 2rem; height: 1px; background: var(--blue); content: ""; }

.editions-section { overflow: hidden; background: var(--night); color: var(--white); }
.editions-section::before { position: absolute; right: -10rem; bottom: -14rem; width: 34rem; border: 1px solid rgba(88, 186, 255, 0.14); border-radius: 50%; aspect-ratio: 1; box-shadow: 0 0 0 7rem rgba(88, 186, 255, 0.02); content: ""; }
.editions-heading { position: relative; display: grid; align-items: end; gap: clamp(2rem, 8vw, 8rem); margin-bottom: clamp(3.5rem, 7vw, 6rem); grid-template-columns: minmax(0, 1.2fr) minmax(17rem, 0.6fr); }
.editions-heading .section-kicker { color: var(--blue-bright); }
.editions-heading h2 { margin-bottom: 0; }
.editions-heading > p { margin-bottom: 0.3rem; padding-top: 1rem; border-top: 1px solid var(--line-dark); color: var(--white-soft); }
.edition-grid { position: relative; display: grid; border-top: 1px solid var(--line-dark); border-left: 1px solid var(--line-dark); grid-template-columns: repeat(3, minmax(0, 1fr)); }
.edition-card { display: flex; min-width: 0; min-height: 39rem; flex-direction: column; padding: clamp(1.7rem, 3vw, 3rem); border-right: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); background: rgba(255, 255, 255, 0.018); }
.edition-card--featured { background: rgba(8, 126, 232, 0.1); }
.edition-card__meta { display: flex; justify-content: space-between; gap: 1rem; margin-bottom: clamp(3rem, 6vw, 5rem); color: var(--white-soft); font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.12em; text-transform: uppercase; }
.edition-card__meta span:first-child { color: var(--blue-bright); }
.edition-card h3 { margin-bottom: 0.4rem; font-family: var(--serif); font-size: clamp(2.3rem, 4vw, 3.5rem); font-weight: 400; }
.edition-price { margin-bottom: 2rem; color: var(--white); font-family: var(--serif); font-size: clamp(2rem, 3.2vw, 3rem); line-height: 1; }
.edition-price span { margin-right: 0.45rem; color: var(--blue-bright); font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.12em; vertical-align: middle; }
.edition-description { min-height: 6rem; color: var(--white-soft); }
.edition-card ul { display: grid; gap: 0.65rem; margin: 0 0 2rem; padding: 1.5rem 0 0; border-top: 1px solid var(--line-dark); color: var(--white-soft); font-size: 0.86rem; list-style: none; }
.edition-card li::before { margin-right: 0.7rem; color: var(--blue-bright); content: "↳"; font-family: var(--mono); }
.edition-card .button { width: 100%; margin-top: auto; }
.edition-card cite { font-style: normal; }
.editions-note { position: relative; max-width: 60rem; margin: 2rem 0 0 auto; padding-top: 1rem; border-top: 1px solid var(--line-dark); color: var(--white-soft); font-size: 0.78rem; }
.editions-note span { margin-right: 1rem; color: var(--blue-bright); font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.12em; text-transform: uppercase; }

.chapter-preview { overflow: hidden; background: var(--paper-blue); }
.chapter-preview::before {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, transparent calc(50% - 0.5px), rgba(19, 25, 31, 0.055) 50%, transparent calc(50% + 0.5px));
  background-size: 25% 100%;
  content: "";
  pointer-events: none;
}
.preview-layout { position: relative; display: grid; align-items: start; gap: clamp(3rem, 8vw, 8rem); grid-template-columns: minmax(18rem, 0.7fr) minmax(0, 1fr); }
.preview-heading { position: sticky; top: 7rem; }
.preview-number { margin: 0 0 -0.22em; color: transparent; font-family: var(--serif); font-size: clamp(8rem, 16vw, 14rem); line-height: 0.75; -webkit-text-stroke: 1px rgba(8, 126, 232, 0.3); }
.preview-heading h2 { max-width: 11ch; font-size: clamp(2.8rem, 5vw, 5.5rem); }
.preview-lead { max-width: 43ch; margin-bottom: 2.5rem; color: var(--ink-soft); }
.reading-key { max-width: 31rem; padding: 1.5rem 0 0 1.5rem; border-top: 1px solid var(--blue); border-left: 1px solid var(--blue); }
.reading-key p { margin-bottom: 0; color: var(--ink-soft); font-size: 0.88rem; }
.reading-key .reading-key__label { margin-bottom: 0.7rem; color: var(--blue); font-family: var(--mono); font-size: 0.62rem; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; }
.preview-paper { position: relative; padding: clamp(2.5rem, 6vw, 5.5rem); background: var(--paper-light); box-shadow: 0 2.5rem 6rem rgba(4, 15, 25, 0.15); }
.preview-paper::before { position: absolute; top: 0; left: clamp(2.5rem, 6vw, 5.5rem); width: 4rem; height: 0.3rem; background: var(--blue); content: ""; }
.preview-paper > p { color: #303b45; font-family: var(--serif); font-size: clamp(1.22rem, 1.8vw, 1.55rem); line-height: 1.62; }
.preview-paper > p:first-child::first-letter { float: left; margin: 0.08em 0.12em 0 0; color: var(--blue); font-size: 5.6rem; line-height: 0.68; }
.preview-paper footer { display: flex; justify-content: space-between; gap: 1rem; margin-top: 3rem; padding-top: 1.2rem; border-top: 1px solid var(--line); }
.preview-paper footer p { margin: 0; color: var(--ink-soft); font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.1em; text-transform: uppercase; }
.preview-paper cite { font-style: normal; }

.applications-section { background: var(--night-soft); color: var(--white); }
.application-grid { display: grid; border-top: 1px solid var(--line-dark); border-left: 1px solid var(--line-dark); grid-template-columns: repeat(2, minmax(0, 1fr)); }
.application-grid article { min-height: 19rem; padding: clamp(2rem, 4vw, 3.5rem); border-right: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); transition: background-color 220ms ease; }
.application-grid article:hover { background: rgba(88, 186, 255, 0.055); }
.application-grid article > span { display: block; margin-bottom: 4rem; color: var(--blue-bright); font-family: var(--mono); font-size: 0.64rem; }
.application-grid h3 { font-family: var(--serif); font-size: clamp(2rem, 3vw, 2.8rem); font-weight: 400; }
.application-grid p { max-width: 44ch; margin-bottom: 0; color: var(--white-soft); }

.author-section { background: var(--paper-light); color: var(--ink); }
.author-layout { display: grid; align-items: start; gap: clamp(3.5rem, 9vw, 9rem); grid-template-columns: minmax(18rem, 0.68fr) minmax(0, 1.1fr); }
.author-portrait { position: sticky; top: 7rem; margin: 0; }
.author-portrait::before { position: absolute; z-index: -1; top: -1.25rem; right: 1.25rem; bottom: 1.25rem; left: -1.25rem; border: 1px solid var(--blue); content: ""; }
.author-portrait img { width: 100%; height: auto; aspect-ratio: 4 / 5; filter: saturate(0.75) contrast(1.04); object-fit: cover; object-position: center top; }
.author-portrait figcaption { margin-top: 1rem; color: var(--ink-soft); font-family: var(--mono); font-size: 0.64rem; letter-spacing: 0.14em; text-transform: uppercase; }
.author-copy h2 { margin-bottom: 1rem; }
.author-role { max-width: 46ch; margin-bottom: 2.5rem; color: var(--blue); font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; }
.author-copy blockquote { position: relative; margin: 3.5rem 0 0; padding: 2.5rem 0 0; border-top: 1px solid var(--line); color: var(--ink); font-family: var(--serif); font-size: clamp(1.65rem, 3vw, 2.6rem); font-style: italic; line-height: 1.28; }

.origin-section { background: var(--night); color: var(--white); }
.origin-section .prose { color: var(--white-soft); }
.origin-layout { display: grid; align-items: start; gap: clamp(2rem, 8vw, 8rem); grid-template-columns: 13rem minmax(0, 1fr); }
.origin-index { position: sticky; top: 7rem; color: transparent; font-family: var(--serif); font-size: clamp(8rem, 17vw, 14rem); line-height: 0.75; -webkit-text-stroke: 1px rgba(88, 186, 255, 0.43); }

.final-cta { position: relative; overflow: hidden; padding-block: clamp(7rem, 13vw, 12rem); background: var(--blue); color: #fff; }
.final-cta__grid { background-image: linear-gradient(90deg, transparent calc(50% - 0.5px), rgba(255, 255, 255, 0.16) 50%, transparent calc(50% + 0.5px)); }
.final-cta::before { position: absolute; top: 50%; left: 50%; color: rgba(255, 255, 255, 0.08); content: "IH"; font-family: var(--serif); font-size: min(55vw, 48rem); line-height: 0.7; transform: translate(-50%, -50%); }
.final-cta__inner { position: relative; max-width: 59rem; text-align: center; }
.final-cta h2 { max-width: 14ch; margin-inline: auto; }
.final-cta__inner > p:not(.section-kicker, .purchase-note) { max-width: 62ch; margin-inline: auto; color: rgba(255, 255, 255, 0.82); }
.final-cta .button-row { margin-top: 2.5rem; }
.final-cta .button { border-color: var(--night); background: var(--night); }
.final-cta .button:hover { border-color: #fff; background: #fff; color: var(--blue); }
.final-cta .button--ghost { border-color: rgba(255, 255, 255, 0.58); background: transparent; }
.purchase-note { margin: 1.4rem auto 0; color: rgba(255, 255, 255, 0.66); font-size: 0.75rem; }

.site-footer { padding-block: 4.5rem 2rem; border-top: 1px solid var(--line-dark); background: var(--night); color: var(--white); }
.footer-layout { display: grid; align-items: start; gap: 2rem; grid-template-columns: 1.2fr 1fr auto; }
.footer-title { margin-bottom: 0.25rem; font-family: var(--serif); font-size: 1.7rem; }
.footer-title + p { color: var(--white-soft); font-size: 0.84rem; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 1rem 1.5rem; }
.site-footer nav a { color: var(--white-soft); font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.1em; text-decoration: none; text-transform: uppercase; }
.site-footer nav a:hover { color: var(--blue-bright); }
.footer-editorial { color: var(--white-soft); font-size: 0.8rem; text-transform: uppercase; }
.footer-editorial span { color: var(--neo); font-weight: 700; }
.footer-legal { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--line-dark); }
.footer-legal p { margin: 0; color: #728494; font-size: 0.72rem; }

.purchase-dialog { width: min(calc(100% - 2rem), 34rem); border: 1px solid var(--line); border-radius: 0; padding: clamp(2rem, 5vw, 3rem); background: var(--paper-light); color: var(--ink); box-shadow: var(--shadow); }
.purchase-dialog::backdrop { background: rgba(4, 12, 19, 0.82); -webkit-backdrop-filter: blur(5px); backdrop-filter: blur(5px); }
.purchase-dialog h2 { margin-bottom: 1.25rem; font-size: clamp(2rem, 5vw, 3.2rem); }
.purchase-dialog > p:not(.section-kicker) { color: var(--ink-soft); }
.dialog-close { position: absolute; top: 1rem; right: 1rem; width: 2.5rem; height: 2.5rem; border: 1px solid var(--line); border-radius: 50%; background: transparent; color: var(--ink); cursor: pointer; font-size: 1.5rem; }
.reveal { opacity: 0; transform: translateY(1.25rem); transition: opacity 600ms ease, transform 600ms ease; }
.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 960px) {
  .menu-toggle { display: inline-flex; }
  .primary-nav { position: fixed; inset: 5rem 0 auto; display: grid; max-height: calc(100svh - 5rem); align-items: stretch; gap: 0; overflow-y: auto; border-bottom: 1px solid var(--line); padding: 1rem 1.5rem 1.5rem; background: rgba(241, 238, 231, 0.99); color: var(--ink); transform: translateY(-130%); transition: transform 220ms ease; }
  .primary-nav.is-open { transform: translateY(0); }
  .primary-nav > a { padding: 1rem 0.25rem; border-bottom: 1px solid var(--line); font-size: 0.72rem; }
  .primary-nav .button { margin-top: 1rem; }
  .hero-layout { grid-template-columns: minmax(0, 1fr) minmax(17rem, 0.72fr); }
  .book-story { grid-template-columns: 1fr; }
  .edition-grid { grid-template-columns: 1fr; }
  .edition-card { min-height: auto; }
  .edition-description { min-height: 0; }
  .book-composition { width: min(100%, 43rem); min-height: 43rem; margin-inline: auto; }
  .author-layout { grid-template-columns: minmax(15rem, 0.65fr) 1fr; }
}

@media (max-width: 767px) {
  .container { width: min(calc(100% - 1.5rem), var(--container)); }
  .nav-shell { min-height: 4.75rem; }
  .brand__edition { display: none; }
  .brand__title { font-size: 1.08rem; }
  .primary-nav { inset: 4.75rem 0 auto; max-height: calc(100svh - 4.75rem); }
  .hero { min-height: auto; padding-block: 7.5rem 5rem; }
  .hero-layout { gap: 4rem; grid-template-columns: 1fr; }
  .hero-meta { margin-bottom: 2.5rem; }
  .hero-meta p:last-child { display: none; }
  h1 { font-size: clamp(3.8rem, 19vw, 6rem); }
  h2 { font-size: clamp(2.5rem, 12vw, 3.8rem); }
  .button-row { align-items: stretch; flex-direction: column; }
  .button-row .button { width: 100%; }
  .hero-book { width: min(90vw, 28rem); }
  .hero-book figcaption { right: 0; }
  .scroll-cue { display: none; }
  .two-columns { column-count: 1; column-rule: 0; }
  .campaign-heading { align-items: start; grid-template-columns: 1fr; }
  .editions-heading { align-items: start; grid-template-columns: 1fr; }
  .campaign-heading > p { max-width: 38rem; }
  .campaign-sequence { display: flex; width: calc(100% + 0.75rem); overflow-x: auto; padding: 0 0.75rem 1.5rem 0; scroll-padding-inline: 0.75rem; scroll-snap-type: x mandatory; scrollbar-width: thin; }
  .campaign-sequence li { width: min(78vw, 25rem); flex: 0 0 min(78vw, 25rem); scroll-snap-align: start; }
  .method-layout, .author-layout, .origin-layout, .preview-layout { grid-template-columns: 1fr; }
  .method-mark { width: min(82vw, 25rem); margin-inline: auto; }
  .statement { padding-left: 4rem; }
  .statement::before { font-size: 5rem; }
  .axis-list li { min-height: 0; align-items: start; gap: 1rem; padding-block: 2rem; grid-template-columns: 2.5rem minmax(0, 1fr); }
  .book-composition { display: grid; min-height: 0; gap: 1.5rem; }
  .book-composition img { position: static; width: min(92vw, 30rem); margin-inline: auto; }
  .book-composition__front, .book-composition__back { transform: none; }
  .book-gallery { grid-template-columns: 1fr; }
  .book-gallery figure { width: min(100%, 30rem); margin-inline: auto; }
  .book-gallery figure:nth-child(2) { margin-top: 0; }
  .preview-heading { position: static; }
  .preview-number { font-size: 7rem; }
  .preview-paper footer { align-items: flex-start; flex-direction: column; }
  .application-grid { grid-template-columns: 1fr; }
  .application-grid article { min-height: auto; }
  .application-grid article > span { margin-bottom: 2rem; }
  .author-portrait { position: static; width: min(100%, 28rem); margin-inline: auto; }
  .origin-index { position: static; font-size: 7rem; }
  .footer-layout { grid-template-columns: 1fr; }
}

@media (max-width: 420px) {
  .section { padding-block: 4.75rem; }
  .hero-book figcaption { position: static; margin-top: 0.75rem; text-align: center; }
  .statement { padding-left: 0; }
  .statement::before { position: static; display: block; height: 3.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
  .reveal { opacity: 1; transform: none; }
}