/* SERO · El Primer Capítulo
   El mismo sistema editorial de El Archivo (papel, tinta y el rojo de SERO como
   puntuación), escrito primero para el teléfono. */

:root {
  color-scheme: only light;
  --paper: #f4f1ea;
  --paper-deep: #ebe6da;
  --paper-shade: #e0d9c9;
  --ink: #0e0e0f;
  --ink-soft: #3a3935;
  --muted: #77736a;
  --rule: #d6cfbf;
  --red: #ff2d2d;
  --red-ink: #d42020;
  --red-wash: #fff4f1;
  --green: #008a4a;
  --night: #0c0c0d;
  --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: 1200px;
  --gutter: clamp(18px, 4.6vw, 56px);
  --nav-h: 58px;
  --radius: 22px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 14px); -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif-text);
  font-size: 18px;
  line-height: 1.6;
  font-optical-sizing: auto;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
}
/* Grano de papel solo en pantallas grandes: en teléfonos modestos no cuesta ni un cuadro. */
@media (hover: hover) and (pointer: fine) {
  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, svg, canvas { 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; }
button { font: inherit; color: inherit; }
code { font-family: var(--mono); font-size: 0.8em; overflow-wrap: anywhere; }

.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; }

/* Estados del capítulo: cada pieza declara en qué estados existe. */
body[data-estado="cargando"] [data-solo]:not([data-solo~="cargando"]),
body[data-estado="preparando"] [data-solo]:not([data-solo~="preparando"]),
body[data-estado="abierto"] [data-solo]:not([data-solo~="abierto"]),
body[data-estado="cerrado"] [data-solo]:not([data-solo~="cerrado"]) { display: none !important; }
[hidden] { display: none !important; }

/* ── Tipografía ──────────────────────────────────────────────────────── */
.kicker {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0;
}
.kicker b { color: var(--red); font-weight: 500; }
.prose p { margin: 0 0 18px; max-width: 36em; }
.hero h1, .edicion, .entry h2, .card h3, .quote, .cuenta-pagos, .porahora { text-wrap: balance; }
.prose p.big { font-size: 20px; line-height: 1.5; color: var(--ink-soft); }

/* ── Botones ─────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 46px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-decoration: none;
  white-space: nowrap;
  padding: 12px 20px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-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); }
.btn:disabled { opacity: 0.55; cursor: wait; }
.enlace {
  background: none;
  border: 0;
  padding: 6px 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.25em;
  cursor: pointer;
}
.enlace:hover { color: var(--red-ink); }

/* ── Navegación ──────────────────────────────────────────────────────── */
.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) 90%, 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: 24px; width: 100%; }
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; min-width: 0; }
.brand img { width: 24px; height: 25px; flex: none; }
.brand span { font-family: var(--mono); font-size: 11px; letter-spacing: 0.2em; white-space: nowrap; }
.nav ul { list-style: none; display: none; gap: 18px; margin: 0 0 0 auto; padding: 0; }
.nav ul a { font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.04em; text-decoration: none; color: var(--ink-soft); white-space: nowrap; }
.nav ul a:hover, .nav ul a.active { color: var(--red-ink); }
.nav .btn { margin-left: auto; min-height: 38px; padding: 8px 14px; font-size: 11.5px; }

/* ── Portada ─────────────────────────────────────────────────────────── */
/* El sello de cierre entra desde fuera de escala: nunca debe abrir un desplazamiento horizontal. */
.hero, .cierre { overflow-x: hidden; overflow-x: clip; }
.hero { padding: calc(var(--nav-h) + 34px) 0 56px; border-bottom: 1px solid var(--rule); }
.hero > .wrap { display: grid; gap: 40px; }
.marca {
  margin: 20px 0 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--red-ink);
}
.titular { position: relative; }
.hero h1 {
  font-family: var(--serif-display);
  font-weight: 500;
  font-size: clamp(52px, 15.2vw, 118px);
  line-height: 0.9;
  letter-spacing: -0.018em;
  margin: 0 0 18px;
}
.hero h1 em { font-style: italic; font-weight: 400; }
.estampa {
  position: absolute;
  right: 2%;
  top: 8%;
  font-family: var(--mono);
  font-size: clamp(13px, 3.4vw, 18px);
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--red);
  border: 3px solid var(--red);
  padding: 6px 8px 6px 12px;
  transform: rotate(-9deg);
  mix-blend-mode: multiply;
  animation: estampar 0.9s var(--ease) 0.5s both;
}
.edicion {
  font-family: var(--serif-display);
  font-style: italic;
  font-size: clamp(21px, 5.6vw, 28px);
  line-height: 1.25;
  color: var(--ink-soft);
  margin: 0 0 22px;
}
.edicion::before { content: ""; display: inline-block; width: 26px; height: 2px; background: var(--red); vertical-align: middle; margin: 0 12px 5px 0; }
.lede { font-size: 19px; line-height: 1.55; color: var(--ink-soft); max-width: 34em; margin: 0 0 26px; }
.capitular::first-letter {
  font-family: var(--serif-display);
  float: left;
  font-size: 4.2em;
  line-height: 0.8;
  padding: 0.07em 0.09em 0 0;
  color: var(--red);
  font-weight: 500;
}

.aviso, .cuenta { padding: 14px 18px; margin: 0 0 24px; }
.aviso { border: 1px solid var(--ink); background: var(--paper-deep); }
.aviso p, .cuenta p { margin: 0; font-size: 17px; }
.cuenta { border: 1px solid var(--red); background: var(--red-wash); }
.cuenta .cuenta-pagos { font-family: var(--serif-display); font-size: 25px; line-height: 1.2; font-weight: 500; font-variant-numeric: lining-nums; }
.cuenta .cuenta-tiempo { margin-top: 4px; color: var(--ink-soft); }
.cuenta .cuenta-tiempo:empty { display: none; }

.marcador {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--ink);
  margin: 0 0 26px;
}
.marcador > div { padding: 14px 8px 12px 0; min-width: 0; }
.marcador > div + div { padding-left: 14px; border-left: 1px solid var(--rule); }
.marcador strong {
  display: block;
  font-family: var(--serif-display);
  font-weight: 500;
  font-size: clamp(26px, 7.4vw, 46px);
  line-height: 1;
  font-variant-numeric: lining-nums tabular-nums;
  white-space: nowrap;
}
.marcador span { display: block; margin-top: 7px; font-family: var(--mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); line-height: 1.35; }
.barra { grid-column: 1 / -1; position: relative; height: 3px; margin: 0; background: var(--paper-shade); overflow: hidden; }
.barra i { position: absolute; inset: 0 auto 0 0; width: 0; background: var(--red); transition: width 1.4s var(--ease); }

.actions { display: flex; flex-wrap: wrap; gap: 12px; }
.actions .btn { flex: 1 1 auto; }
.compartir { margin: 14px 0 0; color: var(--muted); }

/* La lámina: esquinas suaves, aparece revelándose y respira despacio. */
.lamina { margin: 0; animation: aparecer 1.3s var(--ease) 0.15s both; }
.lamina .marco {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  isolation: isolate;
  background: var(--paper-deep);
  box-shadow: 0 1px 0 var(--rule), 0 22px 48px -28px rgba(14, 14, 15, 0.55);
  transition: transform 0.7s var(--ease), box-shadow 0.7s ease;
}
.lamina .marco::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(105deg, transparent 38%, rgba(255, 255, 255, 0.28) 50%, transparent 62%);
  transform: translateX(-120%);
  animation: brillo 2.4s var(--ease) 1.1s both;
}
.lamina img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transform-origin: 58% 62%;
  animation: respirar 26s ease-in-out 1.4s infinite alternate;
}
.lamina:hover .marco { transform: translateY(-6px); box-shadow: 0 1px 0 var(--rule), 0 32px 56px -26px rgba(14, 14, 15, 0.6); }
.lamina figcaption { margin-top: 12px; font-family: var(--serif-display); font-style: italic; font-size: 17px; line-height: 1.4; color: var(--muted); }
.lamina figcaption b { font-family: var(--mono); font-style: normal; font-size: 10.5px; letter-spacing: 0.18em; color: var(--red-ink); margin-right: 10px; font-weight: 500; }

@keyframes aparecer { from { opacity: 0; transform: translateY(18px) scale(0.985); } to { opacity: 1; transform: none; } }
@keyframes respirar { from { transform: scale(1.01); } to { transform: scale(1.075) translate(-1.1%, -0.8%); } }
@keyframes brillo { to { transform: translateX(120%); } }
@keyframes estampar {
  0% { opacity: 0; transform: rotate(-14deg) scale(1.5); }
  55% { opacity: 1; transform: rotate(-7deg) scale(0.95); }
  100% { opacity: 1; transform: rotate(-9deg) scale(1); }
}

/* ── Secciones ───────────────────────────────────────────────────────── */
/* Las secciones se numeran solas: al cerrar, el colofón ocupa el lugar de «Cómo se escribe». */
main { counter-reset: entrada; }
.entry:not(.cierre) { counter-increment: entrada; }
.entry { padding: 72px 0; border-bottom: 1px solid var(--rule); }
.entry-head { display: grid; gap: 16px; margin-bottom: 36px; }
.entry-num { font-family: var(--serif-display); font-size: 58px; line-height: 0.8; color: var(--red); font-weight: 400; }
.entry-num::before { content: counter(entrada, upper-roman); }
.entry-num small { display: block; margin-top: 14px; 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(38px, 9.6vw, 64px); line-height: 1.04; letter-spacing: -0.01em; margin: 10px 0 18px; max-width: 16em; }
.entry h2 em { font-style: italic; }
.entry-body > .col { min-width: 0; }

.card { border-top: 1px solid var(--ink); padding-top: 20px; }
.card h3 { font-family: var(--serif-display); font-weight: 600; font-size: 27px; line-height: 1.15; margin: 10px 0 10px; }
.card p { margin: 0; color: var(--ink-soft); font-size: 17.5px; }
.card .kicker { color: var(--red-ink); }
.card.alerta { border-top-color: var(--red); }
.grid-3, .pasos { display: grid; gap: 34px; }
.pasos { list-style: none; margin: 0; padding: 0; }
.nota { margin: 34px 0 0; font-size: 17px; color: var(--ink-soft); }

/* ── Registro ────────────────────────────────────────────────────────── */
.registro-form { border: 1px solid var(--ink); background: var(--paper-deep); padding: 22px 18px 20px; max-width: 760px; }
.registro-form label { display: block; font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); margin-bottom: 8px; }
.campo { display: flex; gap: 10px; align-items: center; border-bottom: 1.5px solid var(--ink); }
.campo:focus-within { border-bottom-color: var(--red); }
.campo input {
  flex: 1;
  min-width: 0;
  font-family: var(--mono);
  font-size: 16px;
  padding: 14px 0 12px;
  border: 0;
  background: transparent;
  color: var(--ink);
  outline: none;
  border-radius: 0;
}
.campo input::placeholder { color: var(--muted); }
.campo input:disabled { opacity: 0.5; }
.pegar {
  flex: none;
  min-height: 36px;
  padding: 0 14px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1px solid var(--ink);
  background: transparent;
  cursor: pointer;
}
.pegar:hover { background: var(--ink); color: var(--paper); }
.previa { min-height: 1.5em; margin: 8px 0 0; font-family: var(--mono); font-size: 12.5px; color: var(--green); letter-spacing: 0.02em; }
.ayuda { margin: 4px 0 18px; font-size: 15.5px; color: var(--muted); line-height: 1.45; }
.aviso-form { color: var(--ink); }
.enviar { width: 100%; }
.respuesta { margin: 16px 0 0; font-size: 17px; line-height: 1.5; min-height: 1.5em; }
.respuesta:empty { margin: 0; min-height: 0; }
.respuesta.error { color: var(--red-ink); }
.respuesta.bien { color: var(--green); }
.respuesta.trabajando { color: var(--ink-soft); }
.respuesta.trabajando::after { content: ""; display: inline-block; width: 1.2em; text-align: left; animation: puntos 1.2s steps(4, end) infinite; }
@keyframes puntos { 0% { content: ""; } 25% { content: "."; } 50% { content: ".."; } 75%, 100% { content: "..."; } }

.tarjeta {
  position: relative;
  max-width: 760px;
  margin-top: 26px;
  padding: 30px 22px 24px;
  background: var(--paper);
  border: 1px solid var(--ink);
  overflow: hidden;
}
.tarjeta::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 5px; background: var(--red); }
.tarjeta.entra { animation: tarjeta 0.8s var(--ease) both; }
.tarjeta-sello { position: absolute; right: 20px; top: 24px; width: 40px; height: 42px; color: var(--red); }
.tarjeta .kicker { color: var(--red-ink); padding-right: 52px; }
.tarjeta-wallet { margin: 16px 0 6px; font-family: var(--mono); font-size: clamp(22px, 6.4vw, 32px); letter-spacing: 0.02em; }
.tarjeta-cifras { margin: 0; font-family: var(--serif-display); font-size: clamp(26px, 7vw, 36px); font-weight: 500; line-height: 1.15; font-variant-numeric: lining-nums; }
.tarjeta-orden { margin: 8px 0 0; font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em; color: var(--muted); }
.tarjeta-nota { margin: 16px 0 0; font-size: 17px; color: var(--ink-soft); }
.tarjeta-nota a { color: var(--green); }
.tarjeta-acciones { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.tarjeta-acciones .btn { flex: 1 1 auto; }
@keyframes tarjeta { from { opacity: 0; transform: translateY(14px) scale(0.98); } to { opacity: 1; transform: none; } }

/* ── El fondo: la página de mil casillas ────────────────────────────── */
.fondo-grid { display: grid; gap: 34px; }
.pagina-marco { position: relative; }
.pagina { width: 100%; height: auto; touch-action: manipulation; }
.pagina-tip {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 3;
  pointer-events: none;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  padding: 5px 8px;
  white-space: nowrap;
  transform: translate(-50%, calc(-100% - 8px));
  opacity: 0;
  transition: opacity 0.15s ease;
}
.leyenda { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 14px 0 0; font-family: var(--mono); font-size: 11px; letter-spacing: 0.04em; color: var(--muted); }
.leyenda i { display: inline-block; width: 9px; height: 9px; margin-right: 7px; vertical-align: -1px; }
.l-tinta { background: var(--ink); }
.l-rojo { background: var(--red); }
.l-vacia { background: var(--paper-shade); }
.cifra-fondo { border-top: 1px solid var(--ink); padding-top: 18px; }
.cifra { margin: 10px 0 4px; font-family: var(--serif-display); font-weight: 500; font-size: clamp(58px, 17vw, 92px); line-height: 0.92; font-variant-numeric: lining-nums tabular-nums; white-space: nowrap; }
.cifra small { font-family: var(--mono); font-size: 13px; letter-spacing: 0.14em; margin-left: 10px; color: var(--muted); vertical-align: 0.5em; }
.cifra-fondo .de { margin: 0 0 16px; font-family: var(--serif-display); font-style: italic; font-size: 21px; color: var(--muted); }
.cifra-fondo .ejemplo { margin: 0; font-size: 16.5px; color: var(--ink-soft); }

/* ── Autores: el anillo ─────────────────────────────────────────────── */
.autores-grid { display: grid; gap: 36px; }
.anillo { position: relative; width: min(300px, 78vw); margin: 0 auto; }
.anillo svg { width: 100%; height: auto; overflow: visible; }
.anillo svg circle { transition: stroke-width 0.2s ease, opacity 0.2s ease; }
.anillo svg .parte { cursor: pointer; }
.anillo svg.enfoque .parte { opacity: 0.35; }
.anillo svg.enfoque .parte.activa { opacity: 1; stroke-width: 34; }
.anillo figcaption { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; pointer-events: none; padding: 0 22%; }
.anillo figcaption strong { font-family: var(--serif-display); font-weight: 500; font-size: 46px; line-height: 1; font-variant-numeric: lining-nums; }
.anillo figcaption span { margin-top: 6px; font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); line-height: 1.4; }
.anillo figcaption strong.wallet { font-family: var(--mono); font-size: 17px; letter-spacing: 0.02em; }
.vacio { margin: 0 0 12px; font-size: 18px; color: var(--muted); font-style: italic; }
.lista-autores { list-style: none; margin: 0; padding: 0; }
.lista-autores li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: baseline;
  padding: 9px 6px;
  border-bottom: 1px solid var(--rule);
  transition: background 0.2s ease;
}
.lista-autores li.activo { background: var(--paper-deep); }
.lista-autores .r { font-family: var(--mono); font-size: 11px; color: var(--muted); }
.lista-autores .w { font-family: var(--mono); font-size: 15px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lista-autores .n { font-family: var(--serif-display); font-size: 20px; font-weight: 500; text-align: right; white-space: nowrap; font-variant-numeric: lining-nums tabular-nums; }
.lista-autores .s { grid-column: 2; margin-top: -6px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.04em; color: var(--muted); }
.lista-autores .e { grid-column: 2 / -1; font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; color: var(--green); }
.lista-autores li.tu .w { color: var(--red-ink); }
.lista-autores li.tu .w::after { content: "tú"; margin-left: 8px; padding: 1px 6px; font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase; color: #fff; background: var(--red); vertical-align: 1px; }
.todos { margin-top: 14px; }
.todos summary, details.reglamento summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--red-ink);
  padding: 8px 0;
}
.todos summary::-webkit-details-marker, details.reglamento summary::-webkit-details-marker { display: none; }
.todos summary::before, details.reglamento summary::before { content: "＋ "; }
.todos[open] summary::before, details.reglamento[open] summary::before { content: "－ "; }
.lista-completa { max-height: 380px; overflow: auto; overscroll-behavior: contain; border-top: 1px solid var(--ink); }
.ultimo { margin: 16px 0 0; font-family: var(--mono); font-size: 12px; letter-spacing: 0.04em; color: var(--muted); }
.ultimo:empty { display: none; }

/* ── Juego limpio ────────────────────────────────────────────────────── */
.noche { margin-top: 56px; background: var(--night); color: var(--night-text); padding: 40px 24px 36px; }
.quote { font-family: var(--serif-display); font-style: italic; font-size: clamp(32px, 7.6vw, 50px); line-height: 1.15; margin: 0 0 18px; }
.quote em { color: var(--red); }
.noche p { margin: 0; max-width: 34em; font-size: 18px; color: #d9d3c6; }

/* ── Reglamento ──────────────────────────────────────────────────────── */
.facts { display: grid; grid-template-columns: 1fr; gap: 4px 0; margin: 0 0 32px; font-size: 17.5px; max-width: 900px; }
.facts dt { font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); padding-top: 12px; }
.facts dd { margin: 0; padding-bottom: 10px; border-bottom: 1px solid var(--rule); overflow-wrap: anywhere; }
details.reglamento { border-top: 1px solid var(--ink); padding-top: 8px; }
.bilingual { display: grid; gap: 40px; margin-top: 20px; }
.bilingual > div > .kicker { display: block; margin-bottom: 14px; padding-bottom: 10px; border-bottom: 1px solid var(--ink); }
.bilingual h3 { font-family: var(--serif-display); font-size: 27px; font-weight: 600; line-height: 1.2; margin: 18px 0 4px; }
.bilingual h4 { font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--red-ink); font-weight: 500; margin: 22px 0 6px; }
.bilingual p { margin: 0 0 12px; font-size: 16px; line-height: 1.6; }
.bilingual [lang="es"] p { color: var(--ink-soft); }
.bilingual .ouverture { font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.02em; color: var(--muted); }
.firma-legal { margin-top: 24px !important; font-family: var(--serif-display); font-style: italic; font-size: 19px !important; }

/* ── Colofón del cierre ─────────────────────────────────────────────── */
.cierre { text-align: center; background: var(--paper-deep); }
.sello-fin { width: 84px; height: 88px; margin: 0 auto 22px; color: var(--red); animation: sellar 1.1s var(--ease) 0.2s both; }
.fin { font-family: var(--serif-display); font-weight: 500; letter-spacing: 0.3em; text-transform: uppercase; font-size: clamp(22px, 5.6vw, 36px); line-height: 1.2; margin: 0 auto 12px; max-width: none; padding-left: 0.3em; }
.imprenta { font-family: var(--serif-display); font-style: italic; font-size: 21px; line-height: 1.4; font-variant-numeric: lining-nums; color: var(--ink-soft); max-width: 30em; margin: 0 auto 40px; }
.cierre .kicker { margin-bottom: 14px; }
.firmas { font-family: var(--mono); font-size: 12.5px; line-height: 2.1; letter-spacing: 0.02em; color: var(--ink-soft); max-width: 62em; margin: 0 auto 36px; text-align: center; }
.firmas span { white-space: nowrap; }
.firmas .tu { color: var(--red-ink); }
.firmas .ok::after { content: " ✓"; color: var(--green); }
.entrega p { margin: 0 auto 8px; max-width: 36em; font-size: 17px; }
.entrega .sello-texto { font-family: var(--mono); font-size: 12px; letter-spacing: 0.03em; color: var(--muted); }
.porahora { margin: 44px 0 0; font-family: var(--serif-display); font-style: italic; font-size: clamp(26px, 6vw, 38px); }
.porahora em { color: var(--red); }
@keyframes sellar {
  0% { opacity: 0; transform: scale(2.1) rotate(-24deg); }
  60% { opacity: 1; transform: scale(0.92) rotate(3deg); }
  100% { opacity: 1; transform: none; }
}
body.visto .estampa, body.visto .sello-fin { animation: none; }

/* ── Pie ─────────────────────────────────────────────────────────────── */
.colophon { padding: 64px 0 56px; }
.colophon .seal { width: 40px; height: 42px; margin-bottom: 18px; }
.colophon .grid-3 p { margin: 5px 0; font-size: 15px; color: var(--ink-soft); }
.colophon .fine { margin: 44px 0 0; padding-top: 20px; border-top: 1px solid var(--rule); font-family: var(--mono); font-size: 11px; letter-spacing: 0.06em; color: var(--muted); line-height: 1.8; }

/* ── Avisos flotantes ────────────────────────────────────────────────── */
.toast {
  position: fixed;
  left: 50%;
  bottom: calc(18px + env(safe-area-inset-bottom));
  z-index: 120;
  transform: translateX(-50%);
  max-width: calc(100vw - 32px);
  margin: 0;
  padding: 10px 16px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  text-align: center;
}
.demo {
  position: fixed;
  left: 50%;
  top: calc(var(--nav-h) + 8px);
  z-index: 60;
  transform: translateX(-50%);
  margin: 0;
  padding: 6px 12px;
  background: var(--red);
  color: #fff;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  white-space: nowrap;
}

/* ── Aparición al desplazarse ───────────────────────────────────────── */
.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; }
  .lamina, .lamina img, .lamina .marco::after, .estampa, .sello-fin, .tarjeta.entra { animation: none !important; }
  .lamina .marco::after { display: none; }
  .lamina:hover .marco { transform: none; }
  .barra i { transition: none; }
}

/* ── Pantallas medianas ──────────────────────────────────────────────── */
@media (min-width: 700px) {
  .grid-3, .pasos { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; }
  .registro-form { padding: 32px 34px 30px; }
  .enviar { width: auto; min-width: 240px; }
  .tarjeta { padding: 36px 36px 30px; }
  .tarjeta-acciones .btn { flex: 0 0 auto; }
  .actions .btn { flex: 0 0 auto; }
  .facts { grid-template-columns: max-content minmax(0, 1fr); gap: 0 32px; }
  .facts dt { padding: 14px 0 12px; border-bottom: 1px solid var(--rule); }
  .facts dd { padding: 12px 0; }
  .noche { padding: 56px 56px 50px; }
  .colophon .grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px; }
}

/* ── Escritorio ──────────────────────────────────────────────────────── */
@media (min-width: 960px) {
  body { font-size: 19px; }
  .hero { min-height: 100svh; display: flex; align-items: center; padding: calc(var(--nav-h) + 40px) 0 64px; }
  .hero > .wrap { width: 100%; grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr); gap: 64px; align-items: center; }
  .lede { font-size: 20px; }
  .entry { padding: 120px 0; }
  .entry-head, .entry-body { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 48px; }
  .entry-head { margin-bottom: 60px; }
  .entry-body > .col { grid-column: 2; }
  .entry-num { font-size: 84px; }
  .fondo-grid { grid-template-columns: minmax(0, 1fr) 250px; gap: 48px; align-items: start; }
  .autores-grid { grid-template-columns: 300px minmax(0, 1fr); gap: 56px; align-items: start; }
  .anillo { margin: 0; }
  .bilingual { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 56px; }
  .cierre .wrap { max-width: 980px; }
}
@media (min-width: 1180px) {
  .nav ul { display: flex; }
  .nav .btn { margin-left: 6px; }
}