/* Ostermann Laboratories · El Archivo de SERO
   Editorial system: paper, ink and SERO red as punctuation. Desktop first. */

:root {
  --paper: #f4f1ea;
  --paper-deep: #ebe6da;
  --ink: #0e0e0f;
  --ink-soft: #3a3935;
  --muted: #77736a;
  --rule: #d6cfbf;
  --red: #ff2d2d;
  --red-ink: #d42020;
  --green: #00a95a;
  --night: #0c0c0d;
  --night-soft: #1a1a1b;
  --night-text: #ece8de;
  --night-muted: #a19c91;

  --serif-display: "Cormorant Garamond", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --serif-text: "Newsreader", "Iowan Old Style", Georgia, serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --page: 1240px;
  --gutter: clamp(20px, 4vw, 56px);
  --nav-h: 64px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 16px); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif-text);
  font-size: 19px;
  line-height: 1.6;
  font-optical-sizing: auto;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
/* Paper grain: a whisper of texture, drawn in CSS so it costs no request. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 100;
  opacity: 0.35;
  background-image: radial-gradient(rgba(14, 14, 15, 0.05) 0.6px, transparent 0.6px);
  background-size: 3px 3px;
  mix-blend-mode: multiply;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--red-ink); }
::selection { background: var(--red); color: #fff; }
:focus-visible { outline: 2px solid var(--red); outline-offset: 3px; }

.wrap { max-width: var(--page); margin: 0 auto; padding: 0 var(--gutter); }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 12px; z-index: 200; background: var(--ink); color: var(--paper); padding: 8px 14px; }

/* ── Typography primitives ─────────────────────────────────────────── */
.kicker {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}
.kicker b { color: var(--red); font-weight: 500; }
.display {
  font-family: var(--serif-display);
  font-weight: 500;
  letter-spacing: -0.01em;
  line-height: 1.02;
}
.spaced { letter-spacing: 0.32em; text-transform: uppercase; }
.lede { font-size: 23px; line-height: 1.5; color: var(--ink-soft); max-width: 34em; }
.mono { font-family: var(--mono); font-size: 0.82em; letter-spacing: 0.01em; }
.red { color: var(--red); }
.dash { display: inline-block; width: 28px; height: 2px; background: var(--red); vertical-align: middle; margin: 0 12px 4px 0; }

/* ── Navigation ───────────────────────────────────────────────────── */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  z-index: 50;
  display: flex;
  align-items: center;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}
.nav.scrolled { border-bottom-color: var(--rule); }
.nav .wrap { display: flex; align-items: center; gap: 28px; width: 100%; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand img { width: 26px; height: 27px; }
.brand span { font-family: var(--mono); font-size: 11px; letter-spacing: 0.22em; }
.nav ul { list-style: none; display: flex; gap: 18px; margin: 0 0 0 auto; padding: 0; }
.nav ul a, .brand span, .btn { white-space: nowrap; }
.nav ul a { font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.04em; text-decoration: none; color: var(--ink-soft); }
.nav ul a:hover, .nav ul a.active { color: var(--red-ink); }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-decoration: none;
  padding: 12px 20px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  transition: background 0.2s ease, color 0.2s ease;
}
.btn:hover { background: var(--red); border-color: var(--red); color: #fff; }
.btn.ghost { background: transparent; color: var(--ink); }
.btn.ghost:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.nav .btn { padding: 9px 16px; font-size: 12px; }

/* ── Hero ─────────────────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  padding-top: var(--nav-h);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  border-bottom: 1px solid var(--rule);
}
.hero-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 64px var(--gutter) 72px max(var(--gutter), calc((100vw - var(--page)) / 2 + var(--gutter)));
}
.hero .title {
  font-family: var(--serif-display);
  font-weight: 500;
  font-size: clamp(38px, 4.5vw, 74px);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  line-height: 1;
  margin: 34px 0 14px;
  margin-right: -0.24em;
  white-space: nowrap;
}
.hero .edition { font-family: var(--serif-display); font-style: italic; font-size: 22px; color: var(--muted); margin: 0 0 36px; }
.hero .claim { font-family: var(--serif-display); font-weight: 400; font-size: clamp(30px, 2.8vw, 42px); line-height: 1.15; margin: 0 0 22px; max-width: 16em; }
.hero .claim em { font-style: italic; }
.hero .lede { font-size: 20px; margin: 0 0 36px; max-width: 30em; }
.hero .actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero .note { margin-top: 30px; font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; color: var(--muted); max-width: 38em; }
.hero-art { position: relative; border-left: 1px solid var(--rule); overflow: hidden; background: var(--paper); }
.hero-art canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-art figcaption {
  position: absolute;
  left: 24px;
  bottom: 22px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
  background: color-mix(in srgb, var(--paper) 85%, transparent);
  padding: 4px 8px;
}

/* ── Sections ─────────────────────────────────────────────────────── */
.entry { padding: 132px 0; border-bottom: 1px solid var(--rule); position: relative; }
.entry-head { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 48px; margin-bottom: 64px; }
.entry-num { font-family: var(--serif-display); font-size: 88px; line-height: 0.8; color: var(--red); font-weight: 400; }
.entry-num small { display: block; margin-top: 18px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.22em; color: var(--muted); text-transform: uppercase; }
.entry h2 { font-family: var(--serif-display); font-weight: 500; font-size: clamp(40px, 4.4vw, 64px); line-height: 1.04; letter-spacing: -0.01em; margin: 10px 0 22px; max-width: 16em; }
.entry h2 em { font-style: italic; }
.entry-body { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 48px; }
.entry-body > .col { grid-column: 2; min-width: 0; }
.prose p { margin: 0 0 20px; max-width: 36em; }
.prose p.big { font-size: 23px; line-height: 1.5; }
.rule { border: 0; border-top: 1px solid var(--rule); margin: 56px 0; }

.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 56px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px; }

.card { border-top: 1px solid var(--ink); padding-top: 22px; }
.card h3 { font-family: var(--serif-display); font-weight: 600; font-size: 28px; line-height: 1.15; margin: 10px 0 12px; }
.card p { margin: 0; color: var(--ink-soft); font-size: 18px; }
.card .kicker { color: var(--red-ink); font-size: 12px; margin: 0; }

/* Plates: images framed like prints in an old encyclopedia. */
.plate { margin: 0; }
.plate .frame { border-radius: 22px; overflow: hidden; box-shadow: 0 1px 0 var(--rule), 0 18px 40px -26px rgba(14, 14, 15, 0.45); transition: transform 0.6s cubic-bezier(.2,.7,.2,1), box-shadow 0.6s ease; }
.plate img { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; filter: saturate(0.92) contrast(1.02); transition: transform 1.1s cubic-bezier(.2,.7,.2,1), filter 0.6s ease; }
.plate:hover .frame { transform: translateY(-6px); box-shadow: 0 1px 0 var(--rule), 0 28px 50px -24px rgba(14, 14, 15, 0.5); }
.plate:hover img { transform: scale(1.045); filter: saturate(1.02) contrast(1.04); }
.plate.wide { max-width: 580px; margin-left: auto; margin-right: auto; }
.plate.wide figcaption { text-align: center; }
.plate figcaption { margin-top: 12px; font-family: var(--serif-display); font-style: italic; font-size: 17px; color: var(--muted); }
.plate figcaption b { font-family: var(--mono); font-style: normal; font-size: 11px; letter-spacing: 0.18em; color: var(--red-ink); margin-right: 10px; font-weight: 500; }

.quote {
  font-family: var(--serif-display);
  font-style: italic;
  font-size: clamp(30px, 3vw, 44px);
  line-height: 1.2;
  margin: 0;
  max-width: 22em;
}
.quote cite { display: block; margin-top: 18px; font-family: var(--mono); font-style: normal; font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); }

/* ── Night entry (El Plan) ────────────────────────────────────────── */
.night { background: var(--night); color: var(--night-text); border-bottom-color: #000; }
.night .kicker, .night .entry-num small, .night .quote cite { color: var(--night-muted); }
.night .card { border-top-color: var(--night-text); }
.night .card p { color: #cfc9bc; }
.night .card .kicker { color: var(--red); }
.night .prose p { color: #d9d3c6; }
.versus { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0; border: 1px solid #2c2c2e; }
.versus > div { padding: 40px 40px 44px; }
.versus > div + div { border-left: 1px solid #2c2c2e; }
.versus h3 { font-family: var(--serif-display); font-size: 34px; font-weight: 500; margin: 12px 0 18px; }
.versus ul { list-style: none; padding: 0; margin: 0; }
.versus li { padding: 12px 0; border-top: 1px solid #2c2c2e; font-size: 18px; color: #d9d3c6; }
.versus .orwell h3 { color: var(--night-muted); text-decoration: line-through; text-decoration-color: var(--red); text-decoration-thickness: 2px; }

/* ── Commerce comparison ──────────────────────────────────────────── */
.ledger { width: 100%; border-collapse: collapse; font-size: 18px; }
.ledger th, .ledger td { text-align: left; padding: 16px 14px; border-bottom: 1px solid var(--rule); vertical-align: top; }
.ledger thead th { font-family: var(--mono); font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; font-weight: 500; color: var(--muted); border-bottom: 1px solid var(--ink); }
.ledger td:first-child { font-family: var(--serif-display); font-size: 22px; font-weight: 600; width: 26%; }
.ledger td.old { color: var(--muted); }
.ledger td.new { color: var(--ink); }
.ledger td.new::before { content: "→ "; color: var(--red); font-family: var(--mono); }

/* ── Library ──────────────────────────────────────────────────────── */
.shelf { --cols: 6; --gap: 22px; display: flex; flex-wrap: wrap; justify-content: center; gap: 30px var(--gap); margin: 8px 0 28px; }
.shelf .book { width: calc((100% - (var(--cols) - 1) * var(--gap)) / var(--cols)); }
.book { margin: 0; text-align: center; }
.book img { width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; box-shadow: 0 1px 0 var(--rule), 0 10px 24px -14px rgba(0, 0, 0, 0.35); transition: transform 0.35s ease, box-shadow 0.35s ease; }
.book:hover img { transform: translateY(-6px) rotate(-1.2deg); box-shadow: 0 1px 0 var(--rule), 0 18px 30px -16px rgba(0, 0, 0, 0.45); }
.book figcaption { margin-top: 12px; font-family: var(--serif-display); font-size: 17px; line-height: 1.25; color: var(--ink); }
.book figcaption i { display: block; font-style: italic; font-size: 15px; color: var(--muted); margin-top: 2px; }
.book figcaption b { display: block; font-family: var(--mono); font-size: 10px; letter-spacing: 0.16em; color: var(--red-ink); font-weight: 500; margin-bottom: 4px; }

.lab { border: 1px solid var(--ink); background: var(--paper-deep); padding: 36px 40px 34px; margin-top: 56px; }
.lab label { display: block; font-family: var(--mono); font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); margin-bottom: 12px; }
.lab input {
  width: 100%;
  font-family: var(--serif-display);
  font-size: 30px;
  font-style: italic;
  padding: 10px 0;
  border: 0;
  border-bottom: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  outline: none;
}
.lab input:focus { border-bottom-color: var(--red); }
.hash { margin: 26px 0 10px; font-family: var(--mono); font-size: 21px; letter-spacing: 0.06em; line-height: 1.7; word-break: break-all; min-height: 3.4em; }
.hash span.changed { color: var(--red); }
.lab .meta { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; color: var(--muted); }
.lab .meta strong { color: var(--ink); font-weight: 500; }

/* ── Footnotes (details) ──────────────────────────────────────────── */
details.foot { margin-top: 16px; border-top: 1px dashed var(--rule); padding-top: 12px; }
details.foot summary { cursor: pointer; font-family: var(--mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--red-ink); list-style: none; }
details.foot summary::-webkit-details-marker { display: none; }
details.foot summary::before { content: "＋ "; }
details.foot[open] summary::before { content: "－ "; }
details.foot p { margin: 12px 0 0; font-size: 16px; color: var(--ink-soft); }
details.foot code { font-family: var(--mono); font-size: 14px; }

/* ── Transparency / register ──────────────────────────────────────── */
.facts { display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 14px 32px; margin: 0; font-size: 18px; }
.facts dt { font-family: var(--mono); font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); padding-top: 5px; }
.facts dd { margin: 0; overflow-wrap: anywhere; }
.facts code, .register code { font-family: var(--mono); font-size: 15px; }
.verified { color: var(--green); font-family: var(--mono); font-size: 12px; letter-spacing: 0.1em; }
.register { width: 100%; border-collapse: collapse; font-size: 17px; }
.register th, .register td { text-align: left; padding: 14px 12px; border-bottom: 1px solid var(--rule); vertical-align: top; }
.register thead th { font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); font-weight: 500; border-bottom: 1px solid var(--ink); }
.register td.h { font-family: var(--mono); font-size: 13px; color: var(--ink-soft); word-break: break-all; }
.register td a { font-family: var(--mono); font-size: 13px; white-space: nowrap; }

/* ── Academic programme ───────────────────────────────────────────── */
.pledge { border: 1px solid var(--red); padding: 30px 34px; background: #fff7f5; }
.pledge h3 { font-family: var(--serif-display); font-size: 28px; margin: 6px 0 12px; font-weight: 600; }
.pledge ul { margin: 0; padding-left: 20px; }
.pledge li { margin: 6px 0; font-size: 18px; }

/* ── Contact ──────────────────────────────────────────────────────── */
.channels { list-style: none; padding: 0; margin: 0; }
.channels li { display: flex; justify-content: space-between; align-items: baseline; gap: 24px; padding: 18px 0; border-bottom: 1px solid var(--rule); }
.channels li span { font-family: var(--mono); font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); }
.channels li a { font-family: var(--serif-display); font-size: 28px; text-decoration: none; }
.channels li a:hover { color: var(--red-ink); }

/* ── Colophon / footer ────────────────────────────────────────────── */
.colophon { padding: 88px 0 72px; }
.colophon .grid-3 p { margin: 6px 0; font-size: 15px; color: var(--ink-soft); }
.colophon .seal { width: 44px; height: 46px; color: var(--ink); margin-bottom: 18px; }
.colophon .fine { margin-top: 56px; padding-top: 22px; border-top: 1px solid var(--rule); font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; color: var(--muted); line-height: 1.8; }

/* ── Legal page ───────────────────────────────────────────────────── */
.doc { padding: 72px 0; border-bottom: 1px solid var(--rule); }
.doc h2 { font-family: var(--serif-display); font-size: 40px; font-weight: 500; margin: 8px 0 8px; line-height: 1.1; }
.doc .sub { font-family: var(--serif-display); font-style: italic; color: var(--muted); font-size: 19px; margin: 0 0 36px; }
.bilingual { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 56px; }
.bilingual > div > .kicker { display: block; margin-bottom: 18px; padding-bottom: 10px; border-bottom: 1px solid var(--ink); }
.bilingual h3 { font-family: var(--serif-display); font-size: 23px; font-weight: 600; margin: 28px 0 8px; line-height: 1.25; }
.bilingual p, .bilingual li { font-size: 17px; line-height: 1.6; }
.bilingual p { margin: 0 0 14px; }
.bilingual [lang="fr"] { color: var(--ink); }
.bilingual [lang="es"] { color: var(--ink-soft); }
.precision { margin-top: 24px; border-left: 3px solid var(--red); padding: 12px 18px; background: var(--paper-deep); font-size: 16px; }
.toc { list-style: none; padding: 0; margin: 0; columns: 2; column-gap: 56px; }
.toc li { padding: 10px 0; border-bottom: 1px solid var(--rule); break-inside: avoid; }
.toc a { text-decoration: none; font-family: var(--serif-display); font-size: 22px; }
.toc a b { font-family: var(--mono); font-size: 12px; color: var(--red-ink); margin-right: 12px; font-weight: 500; }

/* ── Guides: covers on the home entry and on /guias/ ─────────────── */
/* Guides name networks and steps (BEP20, 12 palabras): lining figures so a 0 never reads as an o. */
.guide-card h3, .guide-top h1, .folio h2, .pasos h3, .faq summary, .pager b { font-variant-numeric: lining-nums; }
.guides { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px; }
.guide-card { position: relative; margin: 0; }
.guide-card .cover { border-radius: 22px; overflow: hidden; background: var(--night); box-shadow: 0 1px 0 var(--rule), 0 18px 40px -26px rgba(14, 14, 15, 0.45); transition: transform 0.6s cubic-bezier(.2,.7,.2,1), box-shadow 0.6s ease; }
.guide-card .cover img { width: 100%; height: auto; aspect-ratio: 9 / 16; object-fit: cover; transition: transform 1.1s cubic-bezier(.2,.7,.2,1); }
.guide-card:hover .cover { transform: translateY(-6px); box-shadow: 0 1px 0 var(--rule), 0 28px 50px -24px rgba(14, 14, 15, 0.5); }
.guide-card:hover .cover img { transform: scale(1.03); }
.guide-card .kicker { margin: 20px 0 0; color: var(--red-ink); font-size: 12px; }
.guide-card h3 { font-family: var(--serif-display); font-weight: 600; font-size: 28px; line-height: 1.15; margin: 8px 0 10px; }
.guide-card h3 a { text-decoration: none; }
.guide-card h3 a::after { content: ""; position: absolute; inset: 0; border-radius: 22px; }
.guide-card p { margin: 0; color: var(--ink-soft); font-size: 18px; }
.guide-card .meta { margin-top: 12px; font-family: var(--mono); font-size: 12px; letter-spacing: 0.08em; color: var(--muted); }
.guide-card.here .cover { outline: 2px solid var(--red); outline-offset: 6px; }
.guides-note { margin: 44px 0 0; max-width: 44em; font-size: 17px; color: var(--ink-soft); }
.hero .start { margin: 28px 0 0; font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; color: var(--muted); }
.hero .start a { color: var(--ink); margin: 0 2px; }
.hero .start a:hover { color: var(--red-ink); }
.hero .start b { color: var(--red); font-weight: 500; margin: 0 6px; }

/* ── Guide page ───────────────────────────────────────────────────── */
.guide-top { padding: calc(var(--nav-h) + 72px) 0 80px; border-bottom: 1px solid var(--rule); }
.crumbs { margin: 0 0 30px; font-family: var(--mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.crumbs a { color: var(--ink-soft); text-decoration: none; }
.crumbs a:hover { color: var(--red-ink); }
.crumbs span { color: var(--red); margin: 0 10px; }
.guide-top h1 { font-family: var(--serif-display); font-weight: 500; font-size: clamp(46px, 5.6vw, 88px); line-height: 1.02; letter-spacing: -0.01em; margin: 14px 0 22px; max-width: 12em; }
.guide-top h1 em { font-style: italic; }
.guide-top .facts { margin-top: 36px; max-width: 780px; }
.guide-top .actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 40px; }
.nav ul a[aria-current="page"] { color: var(--red-ink); }

.guide { padding: 96px 0 40px; }
.guide .wrap { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 80px; align-items: start; }
.viewer { position: sticky; top: calc(var(--nav-h) + 28px); width: min(380px, calc((100vh - var(--nav-h) - 132px) * 9 / 16)); }
.strip {
  position: relative;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 100%;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  overscroll-behavior-x: contain;
  scrollbar-width: none;
  border-radius: 22px;
  background: var(--night);
  box-shadow: 0 1px 0 var(--rule), 0 18px 40px -26px rgba(14, 14, 15, 0.45);
}
.strip::-webkit-scrollbar { display: none; }
.strip figure { margin: 0; scroll-snap-align: start; }
.strip img { width: 100%; height: auto; aspect-ratio: 9 / 16; object-fit: cover; }
.viewer-bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 16px; font-family: var(--mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.viewer-bar .arrows { display: flex; gap: 8px; }
.viewer-bar button { width: 42px; height: 42px; border: 1px solid var(--ink); background: transparent; color: var(--ink); font-family: var(--mono); font-size: 15px; cursor: pointer; transition: background 0.2s ease, color 0.2s ease; }
.viewer-bar button:hover:not(:disabled) { background: var(--ink); color: var(--paper); }
.viewer-bar button:disabled { opacity: 0.3; cursor: default; }
.viewer-bar button[hidden] { display: none; }
.viewer-bar strong { color: var(--ink); font-weight: 500; }

.folio { padding: 0 0 64px; margin: 0 0 64px; border-bottom: 1px solid var(--rule); scroll-margin-top: calc(var(--nav-h) + 28px); }
.folio:last-child { border-bottom: 0; margin-bottom: 0; }
.folio > .kicker { display: flex; align-items: center; gap: 14px; margin: 0; }
.folio > .kicker::before { content: ""; width: 28px; height: 2px; background: var(--rule); transition: background 0.4s ease, width 0.4s ease; }
.folio.is-active > .kicker::before { background: var(--red); width: 40px; }
.folio > .kicker a { color: var(--red-ink); text-decoration: none; }
.folio h2 { font-family: var(--serif-display); font-weight: 500; font-size: clamp(34px, 3.2vw, 48px); line-height: 1.06; letter-spacing: -0.01em; margin: 12px 0 18px; max-width: 15em; }
.folio h2 em { font-style: italic; }
.folio > p { margin: 0 0 18px; max-width: 34em; }
.folio > p.big { font-size: 22px; line-height: 1.5; }
.folio .aside { font-size: 17px; color: var(--muted); font-style: italic; }
.folio .facts { margin: 26px 0 8px; }
.folio .pledge { margin-top: 30px; }
.folio .pledge p { margin: 0; }
.pasos { list-style: none; margin: 26px 0 0; padding: 0; }
.pasos li { display: grid; grid-template-columns: 56px minmax(0, 1fr); gap: 18px; padding: 18px 0; border-top: 1px solid var(--rule); scroll-margin-top: calc(var(--nav-h) + 28px); }
.pasos .n { font-family: var(--serif-display); font-size: 44px; line-height: 0.9; color: var(--red); font-variant-numeric: lining-nums; }
.pasos h3 { font-family: var(--serif-display); font-weight: 600; font-size: 25px; line-height: 1.2; margin: 2px 0 6px; }
.pasos p { margin: 0; font-size: 18px; color: var(--ink-soft); }
.yes-no { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 32px; margin-top: 28px; }
.yes-no > div { border-top: 1px solid var(--ink); padding-top: 16px; }
.yes-no .kicker { margin: 0 0 6px; font-size: 12px; }
.yes-no .si .kicker { color: var(--green); }
.yes-no .no .kicker { color: var(--red-ink); }
.yes-no p { margin: 0; font-size: 18px; color: var(--ink-soft); }

.faq { padding: 96px 0; border-top: 1px solid var(--rule); }
.faq details { border-top: 1px solid var(--rule); padding: 20px 0; }
.faq details:last-of-type { border-bottom: 1px solid var(--rule); }
.faq summary { display: flex; justify-content: space-between; align-items: baseline; gap: 24px; cursor: pointer; list-style: none; font-family: var(--serif-display); font-size: 26px; font-weight: 600; line-height: 1.25; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "＋"; flex: none; font-family: var(--mono); font-size: 15px; color: var(--red-ink); }
.faq details[open] summary::after { content: "－"; }
.faq details p { margin: 12px 0 0; max-width: 42em; font-size: 18px; color: var(--ink-soft); }
.pager { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px; padding: 72px 0 96px; border-top: 1px solid var(--rule); }
.pager a { display: block; text-decoration: none; border-top: 1px solid var(--ink); padding-top: 18px; }
.pager a.next { text-align: right; }
.pager span { font-family: var(--mono); font-size: 12px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--red-ink); }
.pager b { display: block; margin-top: 8px; font-family: var(--serif-display); font-size: 30px; font-weight: 500; line-height: 1.15; }

/* ── Reveal on scroll ─────────────────────────────────────────────── */
.reveal { transition: opacity 0.9s ease, transform 0.9s ease; }
.reveal.pending { opacity: 0; transform: translateY(18px); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .reveal.pending { opacity: 1; transform: none; transition: none; }
  .book img, .plate img, .plate .frame, .guide-card .cover, .guide-card .cover img { transition: none; }
  .plate:hover img, .plate:hover .frame, .guide-card:hover .cover, .guide-card:hover .cover img { transform: none; }
}

/* ── Smaller screens: never break, just fold ──────────────────────── */
@media (max-width: 1280px) {
  .nav ul { display: none; }
  .nav .btn { margin-left: auto; }
}
@media (max-width: 1100px) {
  .nav .btn { margin-left: auto; }
  .nav ul a { font-size: 11px; }
  .entry-head, .entry-body { grid-template-columns: 1fr; gap: 20px; }
  .entry-body > .col { grid-column: 1; }
  .guides { gap: 28px; }
  .guide { padding-top: 72px; }
  .guide .wrap { grid-template-columns: minmax(0, 1fr); gap: 56px; }
  .viewer { position: static; width: auto; }
  .strip { grid-auto-columns: min(340px, 76%); gap: 16px; margin: 0 calc(-1 * var(--gutter)); padding: 0 var(--gutter); scroll-padding: 0 var(--gutter); border-radius: 0; background: none; box-shadow: none; }
  .strip figure { border-radius: 18px; overflow: hidden; background: var(--night); box-shadow: 0 1px 0 var(--rule), 0 14px 30px -20px rgba(14, 14, 15, 0.45); }
  .viewer-bar { max-width: 340px; }
}
@media (max-width: 860px) {
  body { font-size: 18px; }
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-text { padding: 56px var(--gutter) 40px; }
  .hero-art { min-height: 62vw; border-left: 0; border-top: 1px solid var(--rule); }
  .hero .title { font-size: clamp(30px, 8.6vw, 60px); letter-spacing: 0.18em; margin-right: -0.18em; }
  .entry { padding: 88px 0; }
  .entry-num { font-size: 64px; }
  .grid-2, .grid-3, .grid-4, .versus, .bilingual { grid-template-columns: 1fr; }
  .versus > div + div { border-left: 0; border-top: 1px solid #2c2c2e; }
  .shelf { --cols: 3; --gap: 16px; }
  .lab { padding: 26px 22px; }
  .hash { font-size: 16px; }
  .ledger td:first-child { width: auto; }
  .ledger thead { display: none; }
  .ledger tr { display: block; padding: 14px 0; border-bottom: 1px solid var(--rule); }
  .ledger td { display: block; border-bottom: 0; padding: 3px 0; }
  .ledger td.old::before { content: "Hoy: "; font-family: var(--mono); font-size: 12px; }
  .ledger, .register { font-size: 16px; }
  .register thead { display: none; }
  .register td { display: block; border-bottom: 0; padding: 4px 0; }
  .register tr { display: block; padding: 12px 0; border-bottom: 1px solid var(--rule); }
  .facts { grid-template-columns: 1fr; gap: 4px 0; }
  .facts dd { margin-bottom: 12px; }
  .toc { columns: 1; }
  .channels li { flex-direction: column; gap: 4px; }
  .brand span { display: none; }
  .guides { grid-template-columns: none; grid-auto-flow: column; grid-auto-columns: 74%; gap: 18px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; margin: 0 calc(-1 * var(--gutter)); padding: 0 var(--gutter) 8px; scroll-padding: 0 var(--gutter); }
  .guides::-webkit-scrollbar { display: none; }
  .guide-card { scroll-snap-align: start; }
  .guide-top { padding: calc(var(--nav-h) + 44px) 0 64px; }
  .strip { grid-auto-columns: 76%; }
  .viewer-bar { max-width: none; }
  .folio { padding-bottom: 48px; margin-bottom: 48px; }
  .folio > p.big { font-size: 20px; }
  .pasos li { grid-template-columns: 42px minmax(0, 1fr); gap: 14px; }
  .pasos .n { font-size: 36px; }
  .pasos h3 { font-size: 23px; }
  .yes-no, .pager { grid-template-columns: 1fr; gap: 28px; }
  .pager a.next { text-align: left; }
  .faq { padding: 72px 0; }
  .faq summary { font-size: 22px; }
}

/* ── Ventana entre sitios: rewards ↔ web ─────────────────────────────── */
/* Un <dialog> nativo: sin JavaScript nunca se abre. En el teléfono sube como hoja
   desde abajo; en pantallas grandes queda al centro. Solo anima transform y opacidad. */
html.con-ventana { overflow: hidden; }
.ventana {
  width: min(460px, calc(100vw - 32px));
  max-width: none;
  max-height: calc(100vh - 32px);
  max-height: calc(100dvh - 32px);
  padding: 0;
  border: 1px solid var(--ink);
  border-top: 5px solid var(--red);
  background: var(--paper);
  color: var(--ink);
  overflow: auto;
  overscroll-behavior: contain;
}
.ventana::backdrop { background: rgba(12, 12, 13, 0.56); }
.ventana[open] { animation: ventana-entra 0.5s cubic-bezier(.2, .7, .2, 1) both; }
.ventana[open]::backdrop { animation: ventana-velo 0.4s ease both; }
.ventana.sale { animation: ventana-sale 0.22s ease both; }
.ventana.sale::backdrop { animation: ventana-velo-sale 0.22s ease both; }
.ventana-cerrar {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 2;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  padding: 0;
  border: 1px solid var(--ink);
  border-radius: 50%;
  background: var(--paper);
  color: var(--ink);
  font: 400 22px/1 var(--mono);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}
.ventana-cerrar:hover { background: var(--ink); color: var(--paper); }
.ventana-cuerpo { padding: 24px 24px 26px; }
.ventana .kicker { padding-right: 44px; }
.ventana h2 {
  font-family: var(--serif-display);
  font-weight: 500;
  font-size: clamp(34px, 9.4vw, 46px);
  line-height: 1.02;
  letter-spacing: -0.01em;
  margin: 10px 0 12px;
  text-wrap: balance;
}
.ventana h2 em { font-style: italic; font-weight: 400; }
.ventana-edicion { margin: 0 0 14px; font-family: var(--serif-display); font-style: italic; font-size: 21px; line-height: 1.3; color: var(--ink-soft); text-wrap: balance; }
.ventana-edicion::before { content: ""; display: inline-block; width: 22px; height: 2px; background: var(--red); vertical-align: middle; margin: 0 10px 5px 0; }
.ventana-texto { margin: 0 0 22px; font-size: 17px; line-height: 1.5; color: var(--ink-soft); text-wrap: pretty; }
.ventana-acciones { display: flex; flex-wrap: wrap; gap: 10px; }
.ventana-acciones .btn { flex: 1 1 auto; justify-content: center; min-height: 46px; font: inherit; font-family: var(--mono); font-size: 13px; letter-spacing: 0.08em; cursor: pointer; }

/* Las tres portadas de las guías, en abanico. */
.ventana-guias { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; padding: 58px 26px 4px; }
.ventana-guias img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  object-position: 50% 100%;
  border-radius: 10px;
  background: var(--night);
  box-shadow: 0 16px 28px -18px rgba(14, 14, 15, 0.7);
  --giro: 0deg;
  --baja: 0px;
  transform: rotate(var(--giro)) translateY(var(--baja));
}
.ventana-guias img:nth-child(1) { --giro: -4deg; --baja: 6px; }
.ventana-guias img:nth-child(3) { --giro: 4deg; --baja: 6px; }
.ventana[open] .ventana-guias img { animation: ventana-portada 0.7s cubic-bezier(.2, .7, .2, 1) both; }
.ventana[open] .ventana-guias img:nth-child(1) { animation-delay: 0.12s; }
.ventana[open] .ventana-guias img:nth-child(2) { animation-delay: 0.2s; }
.ventana[open] .ventana-guias img:nth-child(3) { animation-delay: 0.28s; }

/* La lámina de la dinámica. */
.ventana-lamina { margin: 0; overflow: hidden; background: var(--paper-deep); }
.ventana-lamina img { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }

@keyframes ventana-entra { from { opacity: 0; transform: translateY(18px) scale(0.98); } to { opacity: 1; transform: none; } }
@keyframes ventana-sale { to { opacity: 0; transform: translateY(12px) scale(0.985); } }
@keyframes ventana-velo { from { opacity: 0; } to { opacity: 1; } }
@keyframes ventana-velo-sale { from { opacity: 1; } to { opacity: 0; } }
@keyframes ventana-portada { from { opacity: 0; transform: rotate(0deg) translateY(22px); } to { opacity: 1; transform: rotate(var(--giro)) translateY(var(--baja)); } }

@media (max-width: 559px) {
  .ventana {
    width: 100%;
    margin: auto 0 0;
    max-height: calc(100vh - 24px);
    max-height: calc(100dvh - 24px);
    border-width: 5px 0 0;
    padding-bottom: env(safe-area-inset-bottom);
  }
  .ventana[open] { animation-name: ventana-hoja; }
  .ventana.sale { animation-name: ventana-hoja-sale; }
  .ventana-cuerpo { padding: 22px 20px 22px; }
  .ventana-guias { padding: 56px 22px 2px; }
}
@keyframes ventana-hoja { from { transform: translateY(100%); } to { transform: none; } }
@keyframes ventana-hoja-sale { to { transform: translateY(100%); } }

@media (prefers-reduced-motion: reduce) {
  .ventana[open], .ventana[open]::backdrop, .ventana.sale, .ventana.sale::backdrop, .ventana[open] .ventana-guias img { animation: none !important; }
}

/* Entrada I: «Efectivo, pero digital» dentro de la noche del Plan. */
.plan-efectivo { margin-bottom: 40px; scroll-margin-top: calc(var(--nav-h) + 24px); }
.night .facts dt { color: var(--night-muted); }
.night .facts dd { color: var(--night-text); }
.night .plate figcaption { color: var(--night-muted); }
.night .plate figcaption b { color: var(--red); }
.night .plate .frame { box-shadow: 0 18px 40px -26px rgba(0, 0, 0, 0.8); }
.night .card a:hover, .night .prose a:hover { color: var(--red); }