/* Umbral Taller de Arquitectura — demo
   Paleta "Opción B": hueso 60 · negro 25 · gris ~4 · dorado 8 · terracota 5 */

:root {
  --hueso: #F5F1EA;
  --hueso-2: #ECE6DB;
  --negro: #111111;
  --gris: #8A8580;
  --dorado: #C49D3A;
  --terracota: #A85C32;
  --linea: rgba(17, 17, 17, .14);

  --serif: "Fraunces", Georgia, "Times New Roman", serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;

  --wrap: 1240px;
  --gutter: 32px;
  --nav-h: 76px;
  --ease: cubic-bezier(.2, .7, .2, 1);
}

/* Paleta alterna para el portafolio: gris piedra y verde oliva */
:root[data-palette="piedra"] {
  --hueso: #E9E8E3;
  --hueso-2: #DCDBD4;
  --negro: #1B1D1A;
  --gris: #7E817A;
  --dorado: #7D8450;
  --terracota: #55603A;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--hueso);
  color: var(--negro);
  font: 400 17px/1.7 var(--sans);
  -webkit-font-smoothing: antialiased;
  transition: background .4s;
}
img { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3, h4 { margin: 0; font-weight: 300; font-family: var(--serif); line-height: 1.08; }
p { margin: 0 0 1em; }
button, input, select, textarea { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--dorado); outline-offset: 3px; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 var(--gutter); }

.label {
  font: 500 12px/1.4 var(--sans);
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gris);
}
.label--oro { color: var(--dorado); }
.serif-i { font-family: var(--serif); font-style: italic; font-weight: 400; }

.btn {
  display: inline-flex; align-items: center; gap: .7em;
  padding: 16px 28px;
  border: 1px solid currentColor;
  background: transparent;
  font: 500 12px/1 var(--sans); letter-spacing: .16em; text-transform: uppercase;
  text-decoration: none; cursor: pointer;
  transition: background .3s, color .3s, border-color .3s;
}
.btn::after { content: "→"; font-size: 15px; letter-spacing: 0; transition: transform .3s var(--ease); }
.btn:hover::after { transform: translateX(4px); }
.btn:hover { border-color: var(--dorado); color: var(--dorado); }
.btn--primario { background: var(--terracota); border-color: var(--terracota); color: #fff; }
.btn--primario:hover { background: var(--negro); border-color: var(--negro); color: #fff; }
.on-dark .btn--primario:hover { background: #fff; border-color: #fff; color: var(--negro); }

.link-arrow {
  font: 500 12px/1 var(--sans); letter-spacing: .16em; text-transform: uppercase;
  text-decoration: none; border-bottom: 1px solid var(--dorado); padding-bottom: 6px;
}
.link-arrow:hover { color: var(--dorado); }

/* ---------- Encabezado ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  height: var(--nav-h);
  display: flex; align-items: center;
  background: var(--hueso);
  border-bottom: 1px solid var(--linea);
  transition: background .35s, color .35s, border-color .35s;
}
.nav .wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.nav--hero:not(.is-solid) { background: transparent; color: #fff; border-color: transparent; }
.logo { display: flex; align-items: baseline; gap: 10px; text-decoration: none; }
.logo b { font: 400 26px/1 var(--serif); letter-spacing: -.01em; }
.logo span { font: 500 10px/1 var(--sans); letter-spacing: .2em; text-transform: uppercase; opacity: .7; }
.nav ul { list-style: none; display: flex; gap: 34px; margin: 0; padding: 0; }
.nav ul a {
  font: 500 12px/1 var(--sans); letter-spacing: .14em; text-transform: uppercase;
  text-decoration: none; position: relative; padding: 6px 0;
}
.nav ul a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 0; height: 1px;
  background: var(--dorado); transition: right .35s var(--ease);
}
.nav ul a:hover::after, .nav ul a[aria-current="page"]::after { right: 0; }
.nav-toggle { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 1px; background: currentColor; margin: 6px 0; transition: transform .3s; }

/* ---------- Marcador de imagen (se reemplaza al poner img/<archivo>.jpg) ---------- */
.ph {
  position: relative; overflow: hidden; margin: 0;
  background: var(--hueso-2);
  aspect-ratio: 4 / 3;
}
.ph::before {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(160deg, rgba(255,255,255,.25), transparent 55%),
    repeating-linear-gradient(90deg, transparent 0 79px, rgba(17,17,17,.05) 79px 80px),
    repeating-linear-gradient(0deg, transparent 0 79px, rgba(17,17,17,.05) 79px 80px);
}
.ph--a { background: linear-gradient(135deg, #DCCFB8, #C8B697 60%, #B79F7A); }
.ph--b { background: linear-gradient(135deg, #C98A63, #A85C32 70%, #8D4B28); }
.ph--c { background: linear-gradient(135deg, #3A3532, #24211F 70%, #171514); }
:root[data-palette="piedra"] .ph--a { background: linear-gradient(135deg, #D6D5CC, #BDBCB1); }
:root[data-palette="piedra"] .ph--b { background: linear-gradient(135deg, #8E9468, #66704A); }
.ph figcaption {
  position: absolute; left: 16px; right: 16px; bottom: 14px;
  font: 500 10.5px/1.45 var(--sans); letter-spacing: .08em; text-transform: uppercase;
  color: rgba(17,17,17,.55);
}
.ph--b figcaption, .ph--c figcaption { color: rgba(255,255,255,.6); }
.ph figcaption::before { content: "Imagen IA pendiente — "; color: var(--dorado); }
.ph img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: 1; }
.ph.has-img figcaption { display: none; }

/* ---------- Animaciones (no bloquean la lectura) ---------- */
.rv { opacity: 0; transform: translateY(18px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.rv.is-in { opacity: 1; transform: none; }
.reveal-img { clip-path: inset(0 100% 0 0); transition: clip-path 1.2s var(--ease); }
.reveal-img.is-in { clip-path: inset(0 0 0 0); }
@media (prefers-reduced-motion: reduce) {
  .rv, .reveal-img { opacity: 1; transform: none; clip-path: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 100vh; min-height: 100svh;
  display: flex; align-items: flex-end; color: #fff;
}
.hero > .ph { position: absolute; inset: 0; aspect-ratio: auto; }
.hero > .ph figcaption { bottom: auto; top: calc(var(--nav-h) + 16px); left: auto; right: var(--gutter); max-width: 300px; text-align: right; }
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(180deg, rgba(0,0,0,.35) 0%, rgba(0,0,0,0) 30%, rgba(0,0,0,.15) 55%, rgba(0,0,0,.65) 100%);
}
.hero, .portada { padding-top: calc(var(--nav-h) + 32px); }
.hero__body { position: relative; z-index: 2; padding-bottom: 9vh; width: 100%; }
.hero h1 { font-size: clamp(44px, 7vw, 92px); max-width: 13ch; letter-spacing: -.02em; }
.hero p.lead { max-width: 560px; margin: 28px 0 36px; font-size: 19px; opacity: .92; }
.hero .label { color: rgba(255,255,255,.75); margin-bottom: 22px; display: block; }
.hero .btn { color: #fff; }
.hero .btn:hover { color: var(--dorado); }
.hero__scroll {
  position: absolute; z-index: 2; right: var(--gutter); bottom: 9vh;
  writing-mode: vertical-rl; font: 500 10px/1 var(--sans); letter-spacing: .3em; text-transform: uppercase; opacity: .7;
}

/* ---------- Secciones ---------- */
.section { padding: 140px 0; }
.section--tight { padding: 96px 0; }
.section-head { display: grid; grid-template-columns: 1fr 1.3fr; gap: 64px; align-items: end; margin-bottom: 64px; }
.section-head h2 { font-size: clamp(34px, 4vw, 56px); letter-spacing: -.015em; }
.section-head p { color: #4a4643; font-size: 19px; margin: 0; max-width: 520px; }
.num { font: 400 italic 15px/1 var(--serif); color: var(--dorado); }

.manifiesto { display: grid; grid-template-columns: 220px 1fr; gap: 64px; }
.manifiesto blockquote {
  margin: 0; font: 300 clamp(26px, 3vw, 40px)/1.35 var(--serif); letter-spacing: -.01em;
}
.manifiesto blockquote em { font-style: italic; font-weight: 400; color: var(--dorado); }

/* Tarjetas de obra */
.obras-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 56px 32px; }
.obras-grid--2 { grid-template-columns: repeat(2, 1fr); gap: 56px 40px; }
.obras-grid--2 .obra-card .ph { aspect-ratio: 5 / 4; }
.obras-grid--2 .obra-card h3 { font-size: clamp(30px, 3vw, 40px); }
.obra-card { text-decoration: none; display: block; }
.obra-card .ph { aspect-ratio: 4 / 5; }
.obra-card .ph img, .obra-card .ph::after { transition: transform 1.1s var(--ease); }
.obra-card:hover .ph img { transform: scale(1.04); }
.obra-card__meta { display: flex; justify-content: space-between; gap: 12px; margin: 22px 0 8px; }
.obra-card h3 { font-size: 30px; letter-spacing: -.01em; transition: color .3s; }
.obra-card:hover h3 { color: var(--dorado); }
.obra-card p { color: #4a4643; margin: 10px 0 0; font-size: 16px; }
.obra-card.is-hidden { display: none; }

.filtros { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 56px; }
.filtros button {
  border: 1px solid var(--linea); background: transparent; border-radius: 999px;
  padding: 10px 20px; cursor: pointer;
  font: 500 12px/1 var(--sans); letter-spacing: .14em; text-transform: uppercase;
  transition: background .25s, color .25s, border-color .25s;
}
.filtros button:hover { border-color: var(--dorado); }
.filtros button[aria-pressed="true"] { background: var(--negro); color: var(--hueso); border-color: var(--negro); }

/* Método */
.metodo { display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid var(--negro); }
.paso { padding: 28px 24px 0 0; position: relative; }
.paso + .paso { padding-left: 24px; border-left: 1px solid var(--linea); }
.paso .num { font-size: 44px; display: block; margin-bottom: 26px; }
.paso h3 { font: 400 italic 28px/1.1 var(--serif); margin-bottom: 8px; }
.paso .label { display: block; margin-bottom: 14px; }
.paso p { font-size: 15.5px; color: #4a4643; }

/* Aviso de demo */
.aviso {
  border: 1px solid var(--dorado); padding: 18px 22px;
  font-size: 14px; line-height: 1.6; color: #4a4643; background: rgba(196,157,58,.06);
}
.aviso strong { font-weight: 500; color: var(--negro); }

/* Bloque negro de cierre */
.on-dark { background: var(--negro); color: var(--hueso); }
.cierre { padding: 140px 0; text-align: center; }
.cierre h2 { font: 400 italic clamp(32px, 4.2vw, 60px)/1.15 var(--serif); max-width: 18ch; margin: 0 auto 24px; }
.cierre p { max-width: 520px; margin: 0 auto 40px; color: rgba(245,241,234,.72); font-size: 19px; }

/* ---------- Página de obra ---------- */
.progreso {
  position: fixed; left: 0; top: 0; height: 3px; width: 0; z-index: 60;
  background: var(--dorado); transition: width .1s linear;
}
.capitulo-badge {
  position: fixed; z-index: 45; left: var(--gutter); bottom: 28px;
  display: flex; align-items: center; gap: 12px;
  padding: 10px 16px 10px 12px; background: var(--hueso);
  border: 1px solid var(--linea);
  font: 500 11px/1 var(--sans); letter-spacing: .14em; text-transform: uppercase;
  opacity: 0; transform: translateY(10px); transition: opacity .4s, transform .4s, background .4s, color .4s;
  pointer-events: none;
}
.capitulo-badge.is-on { opacity: 1; transform: none; }
.capitulo-badge b { font: 400 italic 20px/1 var(--serif); color: var(--dorado); letter-spacing: 0; text-transform: none; min-width: 26px; text-align: center; }
.capitulo-badge.is-dark { background: var(--negro); color: var(--hueso); border-color: rgba(255,255,255,.15); }

.portada { position: relative; min-height: 100vh; min-height: 100svh; display: flex; align-items: flex-end; color: #fff; }
.portada > .ph { position: absolute; inset: 0; aspect-ratio: auto; }
.portada > .ph figcaption { bottom: auto; top: calc(var(--nav-h) + 16px); left: auto; right: var(--gutter); max-width: 300px; text-align: right; }
.portada::after { content: ""; position: absolute; inset: 0; z-index: 1; background: linear-gradient(180deg, rgba(0,0,0,.3), transparent 35%, rgba(0,0,0,.7)); }
.portada__body { position: relative; z-index: 2; width: 100%; padding-bottom: 10vh; }
.portada h1 { font-size: clamp(44px, 7.2vw, 88px); font-weight: 300; letter-spacing: -.025em; }
.portada .gancho { font: 400 italic clamp(20px, 2.2vw, 28px)/1.35 var(--serif); max-width: 640px; margin-top: 20px; opacity: .92; }
.portada .label { color: rgba(255,255,255,.75); display: block; margin-bottom: 20px; }

.ficha { border-bottom: 1px solid var(--linea); }
.ficha dl { display: grid; grid-template-columns: repeat(5, auto); justify-content: space-between; gap: 24px; margin: 0; padding: 30px 0; }
.ficha dt { font: 500 11px/1.4 var(--sans); letter-spacing: .16em; text-transform: uppercase; color: var(--gris); margin-bottom: 6px; }
.ficha dd { margin: 0; font: 500 13px/1.5 var(--sans); letter-spacing: .1em; text-transform: uppercase; }

.cap { padding: 130px 0; }
.cap__grid { display: grid; grid-template-columns: 5fr 6fr; gap: 88px; align-items: center; }
.cap--rev .cap__grid { grid-template-columns: 6fr 5fr; }
.cap--rev .cap__texto { order: 2; }
.cap__texto { max-width: 520px; }
.cap__num { display: flex; align-items: center; gap: 14px; margin-bottom: 26px; }
.cap__num .num { font-size: 22px; }
.cap__num::after { content: ""; flex: 0 0 56px; height: 1px; background: var(--dorado); }
.cap h2 { font: 400 italic clamp(28px, 3vw, 40px)/1.12 var(--serif); margin-bottom: 28px; }
.cap p { font-size: 19px; line-height: 1.7; }
.cap .ph { aspect-ratio: 5 / 4; }

.cita { padding: 140px 0; background: var(--hueso-2); }
.cita blockquote { margin: 0 auto; max-width: 1040px; text-align: center; }
.cita q { display: block; font: 400 italic clamp(30px, 4vw, 56px)/1.2 var(--serif); color: var(--terracota); quotes: "“" "”"; }
.cita cite { display: block; margin-top: 32px; font: 500 12px/1 var(--sans); letter-spacing: .16em; text-transform: uppercase; font-style: normal; color: var(--gris); }
.cita cite::before { content: "— "; color: var(--dorado); }

.plano { background: #fff; border: 1px solid var(--linea); padding: 24px; }
.plano svg { width: 100%; height: auto; display: block; }
.plano figcaption { margin-top: 14px; }
.plano .muro { fill: none; stroke: #111; stroke-width: 6; stroke-linecap: square; }
.plano .muro-fino { fill: none; stroke: #111; stroke-width: 2; }
.plano .eje { stroke: var(--gris); stroke-width: 1; stroke-dasharray: 4 5; fill: none; }
.plano .arbol { fill: rgba(125,132,80,.18); stroke: #7D8450; stroke-width: 1.5; }
.plano .patio { fill: rgba(196,157,58,.10); }
.plano .anot { fill: none; stroke: var(--terracota); stroke-width: 1.2; }
.plano .anot-dot { fill: var(--terracota); }
.plano text { font: 500 11px var(--sans); letter-spacing: .08em; text-transform: uppercase; fill: #111; }
.plano text.tag { fill: var(--terracota); }
.plano text.cuarto { fill: var(--gris); font-size: 10px; }

.hoy { padding: 140px 0 120px; }
.hoy .cap__num::after { background: var(--dorado); }
.hoy__head { display: grid; grid-template-columns: 5fr 6fr; gap: 88px; margin-bottom: 72px; align-items: end; }
.hoy__head h2 { font: 400 italic clamp(28px, 3vw, 40px)/1.12 var(--serif); }
.hoy__head p { font-size: 19px; color: rgba(245,241,234,.82); margin: 0; }
.galeria { display: grid; grid-template-columns: repeat(12, 1fr); gap: 16px; }
.galeria .ph { aspect-ratio: auto; min-height: 280px; }
.galeria .ph:nth-child(1) { grid-column: span 7; min-height: 460px; }
.galeria .ph:nth-child(2) { grid-column: span 5; min-height: 460px; }
.galeria .ph:nth-child(3) { grid-column: span 4; }
.galeria .ph:nth-child(4) { grid-column: span 4; }
.galeria .ph:nth-child(5) { grid-column: span 4; }
.galeria .ph:nth-child(6) { grid-column: span 12; min-height: 420px; }
.galeria--4 .ph:nth-child(3) { grid-column: span 5; }
.galeria--4 .ph:nth-child(4) { grid-column: span 7; }

/* Comparador antes / después */
.comparador { padding: 0 0 130px; }
.ba { position: relative; aspect-ratio: 16 / 9; overflow: hidden; user-select: none; touch-action: pan-y; }
.ba .ph { position: absolute; inset: 0; aspect-ratio: auto; }
.ba__antes { z-index: 1; }
.ba__despues { z-index: 2; clip-path: inset(0 0 0 50%); }
.ba__handle {
  position: absolute; top: 0; bottom: 0; left: 50%; width: 2px; background: var(--dorado);
  transform: translateX(-1px); z-index: 3; pointer-events: none;
}
.ba__handle::after {
  content: "‹ ›"; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 52px; height: 52px; border-radius: 50%; background: var(--dorado); color: #fff;
  display: grid; place-items: center; font: 400 20px/1 var(--sans); letter-spacing: 2px;
}
.ba input[type=range] {
  position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; cursor: ew-resize; z-index: 4; margin: 0;
}
.ba__tag { position: absolute; top: 16px; z-index: 3; background: rgba(17,17,17,.75); color: #fff; padding: 8px 12px; font: 500 11px/1 var(--sans); letter-spacing: .14em; text-transform: uppercase; }
.ba__tag--a { left: 16px; }
.ba__tag--d { right: 16px; }
.ba .ph figcaption { bottom: 14px; }
.ba__antes figcaption { right: 52%; }
.ba__despues figcaption { left: 52%; }

.siguiente { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid rgba(255,255,255,.15); }
.siguiente a { display: block; padding: 56px var(--gutter); text-decoration: none; transition: background .3s; }
.siguiente a + a { border-left: 1px solid rgba(255,255,255,.15); text-align: right; }
.siguiente a:hover { background: rgba(255,255,255,.04); }
.siguiente a:hover h3 { color: var(--dorado); }
.siguiente h3 { font-size: clamp(28px, 3vw, 42px); margin-top: 12px; transition: color .3s; }
.siguiente .label { color: rgba(245,241,234,.55); }

/* ---------- Nosotros ---------- */
.page-head { padding: calc(var(--nav-h) + 110px) 0 80px; }
.page-head h1 { font-size: clamp(44px, 6.4vw, 88px); letter-spacing: -.025em; max-width: 15ch; }
.page-head p { font-size: 19px; color: #4a4643; max-width: 600px; margin: 28px 0 0; }
.page-head .label { display: block; margin-bottom: 24px; }

.principios { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0; border-top: 1px solid var(--negro); }
.principio { padding: 40px 48px 40px 0; border-bottom: 1px solid var(--linea); display: grid; grid-template-columns: 60px 1fr; }
.principio:nth-child(even) { padding-left: 48px; padding-right: 0; border-left: 1px solid var(--linea); }
.principio .num { font-size: 26px; }
.principio h3 { font: 400 italic 28px/1.15 var(--serif); margin-bottom: 10px; }
.principio p { color: #4a4643; margin: 0; }

.equipo { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
.persona .ph { aspect-ratio: 3 / 4; filter: grayscale(1); }
.persona h3 { font-size: 26px; margin: 22px 0 6px; }
.persona .label { display: block; margin-bottom: 14px; color: var(--dorado); }
.persona p { color: #4a4643; font-size: 16px; }

.servicios { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--negro); }
.servicios li {
  display: flex; justify-content: space-between; align-items: baseline; gap: 24px;
  padding: 26px 0; border-bottom: 1px solid var(--linea);
  font: 300 clamp(22px, 2.4vw, 32px)/1.2 var(--serif);
  transition: padding .35s var(--ease), color .3s;
}
.servicios li:hover { padding-left: 14px; color: var(--dorado); }
.servicios li .num { font-size: 15px; }

.metodo-largo .paso { padding-bottom: 8px; }

/* ---------- Diario ---------- */
.diario-lista { display: grid; gap: 0; border-top: 1px solid var(--negro); }
.entrada { display: grid; grid-template-columns: 340px 1fr; gap: 56px; padding: 56px 0; border-bottom: 1px solid var(--linea); }
.entrada .ph { aspect-ratio: 4 / 3; }
.entrada h2 { font-size: clamp(28px, 3vw, 40px); letter-spacing: -.01em; margin: 14px 0 22px; }
.entrada__meta { display: flex; gap: 18px; }
.entrada__cuerpo { max-width: 640px; }
.entrada__cuerpo p { font-size: 17.5px; }
.entrada details summary { cursor: pointer; list-style: none; display: inline-block; margin-top: 4px; }
.entrada details summary::-webkit-details-marker { display: none; }
.entrada details[open] summary { display: none; }

/* ---------- Contacto ---------- */
.contacto-grid { display: grid; grid-template-columns: 4fr 7fr; gap: 96px; }
.contacto-datos dl { margin: 0; }
.contacto-datos dt { font: 500 11px/1.4 var(--sans); letter-spacing: .16em; text-transform: uppercase; color: var(--gris); margin-top: 28px; }
.contacto-datos dd { margin: 6px 0 0; font-size: 18px; }
.form { display: grid; grid-template-columns: 1fr 1fr; gap: 34px 32px; }
.campo { display: flex; flex-direction: column; gap: 10px; }
.campo--full { grid-column: 1 / -1; }
.campo label, .campo legend { font: 500 11px/1.4 var(--sans); letter-spacing: .16em; text-transform: uppercase; color: var(--gris); padding: 0; }
.campo input, .campo textarea {
  border: 0; border-bottom: 1px solid var(--negro); background: transparent;
  padding: 10px 0 12px; font-size: 18px; border-radius: 0; outline: none;
  transition: border-color .3s;
}
.campo input:focus, .campo textarea:focus { border-color: var(--dorado); }
.campo textarea { resize: vertical; min-height: 140px; line-height: 1.6; }
fieldset.campo { border: 0; margin: 0; padding: 0; min-width: 0; }
.etapas { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin-top: 6px; }
.etapas label {
  display: flex; align-items: center; gap: 12px; cursor: pointer;
  padding: 16px 18px; border: 1px solid var(--linea);
  font: 400 16px/1.3 var(--sans); letter-spacing: 0; text-transform: none; color: var(--negro);
  transition: border-color .25s, background .25s;
}
.etapas label:hover { border-color: var(--dorado); }
.etapas input { accent-color: var(--terracota); width: 16px; height: 16px; margin: 0; }
.etapas label:has(input:checked) { border-color: var(--negro); background: rgba(255,255,255,.55); }
.form-ok {
  grid-column: 1 / -1; display: none;
  padding: 40px; background: var(--negro); color: var(--hueso);
  font: 400 italic clamp(22px, 2.2vw, 30px)/1.35 var(--serif);
}
.form.is-sent .form-ok { display: block; }
.form.is-sent > :not(.form-ok) { display: none; }
.form-error { color: var(--terracota); font-size: 14px; grid-column: 1 / -1; min-height: 1em; margin: -14px 0 0; }

/* ---------- Pie ---------- */
.footer { padding: 96px 0 40px; }
.footer__top { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 64px; padding-bottom: 64px; border-bottom: 1px solid rgba(255,255,255,.14); }
.footer .logo b { font-size: 34px; }
.footer__lema { font: 400 italic 22px/1.35 var(--serif); color: rgba(245,241,234,.8); margin-top: 22px; max-width: 360px; }
.footer h4 { font: 500 11px/1.4 var(--sans); letter-spacing: .16em; text-transform: uppercase; color: var(--dorado); margin-bottom: 18px; }
.footer ul { list-style: none; margin: 0; padding: 0; }
.footer li { margin-bottom: 8px; }
.footer a { text-decoration: none; color: rgba(245,241,234,.82); }
.footer a:hover { color: var(--dorado); }
.footer__aviso {
  margin-top: 40px; padding: 24px 28px; border: 1px solid rgba(196,157,58,.5);
  display: flex; justify-content: space-between; align-items: center; gap: 32px;
  font-size: 14px; line-height: 1.6; color: rgba(245,241,234,.75);
}
.footer__aviso a { color: var(--dorado); white-space: nowrap; border-bottom: 1px solid currentColor; }
.footer__base { display: flex; justify-content: space-between; gap: 24px; margin-top: 32px; font-size: 13px; color: rgba(245,241,234,.5); }
.paleta-toggle { background: none; border: 1px solid rgba(255,255,255,.2); color: rgba(245,241,234,.75); padding: 8px 14px; border-radius: 999px; cursor: pointer; font: 500 11px/1 var(--sans); letter-spacing: .12em; text-transform: uppercase; display: inline-flex; gap: 8px; align-items: center; }
.paleta-toggle:hover { border-color: var(--dorado); color: var(--dorado); }
.paleta-toggle i { display: inline-block; width: 10px; height: 10px; border-radius: 50%; }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .metodo { grid-template-columns: repeat(3, 1fr); row-gap: 40px; }
  .paso:nth-child(4) { border-left: 0; padding-left: 0; }
  .ficha dl { grid-template-columns: repeat(3, 1fr); }
  .cap__grid, .cap--rev .cap__grid, .hoy__head { gap: 56px; }
}

@media (max-width: 860px) {
  :root { --gutter: 16px; --nav-h: 64px; }
  body { font-size: 17px; }
  .nav-toggle { display: block; }
  .nav ul {
    position: fixed; inset: var(--nav-h) 0 auto 0; flex-direction: column; gap: 0;
    background: var(--hueso); color: var(--negro); border-bottom: 1px solid var(--linea);
    padding: 8px var(--gutter) 20px;
    transform: translateY(-8px); opacity: 0; pointer-events: none; transition: opacity .25s, transform .25s;
  }
  .nav ul a { display: block; padding: 16px 0; font-size: 13px; border-bottom: 1px solid var(--linea); }
  .nav ul a::after { display: none; }
  .nav.is-open ul { opacity: 1; transform: none; pointer-events: auto; }
  .nav.is-open { background: var(--hueso); color: var(--negro); border-color: var(--linea); }
  .nav.is-open .nav-toggle span:first-child { transform: translateY(3.5px) rotate(45deg); }
  .nav.is-open .nav-toggle span:last-child { transform: translateY(-3.5px) rotate(-45deg); }
  .logo span { display: none; }

  .section { padding: 88px 0; }
  .section--tight { padding: 64px 0; }
  .section-head, .manifiesto { grid-template-columns: 1fr; gap: 20px; margin-bottom: 40px; }
  .obras-grid { grid-template-columns: 1fr; gap: 48px; }
  .metodo { grid-template-columns: 1fr; border-top: 0; }
  .paso, .paso + .paso { padding: 24px 0; border-left: 0; border-top: 1px solid var(--linea); display: grid; grid-template-columns: 56px 1fr; column-gap: 8px; }
  .paso .num { font-size: 30px; margin: 0; grid-row: span 3; }
  .hero__scroll { display: none; }

  .ficha dl { grid-template-columns: 1fr 1fr; padding: 24px 0; gap: 18px; }
  .ficha dd { font-size: 12px; }
  .cap { padding: 80px 0; }
  .cap__grid, .cap--rev .cap__grid { grid-template-columns: 1fr; gap: 36px; }
  .cap--rev .cap__texto { order: 0; }
  .cap h2, .hoy__head h2 { font-size: 28px; }
  .cap p, .hoy__head p { font-size: 17px; }
  .cita { padding: 88px 0; }
  .hoy { padding: 88px 0 72px; }
  .hoy__head { grid-template-columns: 1fr; gap: 20px; margin-bottom: 40px; }
  .galeria { grid-template-columns: 1fr; }
  .galeria .ph, .galeria .ph:nth-child(n) { grid-column: auto; min-height: 0; aspect-ratio: 4 / 3; }
  .comparador { padding-bottom: 80px; }
  .ba { aspect-ratio: 4 / 3; }
  .ba .ph figcaption { display: none; }
  .siguiente { grid-template-columns: 1fr; }
  .siguiente a + a { border-left: 0; border-top: 1px solid rgba(255,255,255,.15); text-align: left; }
  .cierre { padding: 96px 0; }
  .capitulo-badge { left: 16px; bottom: 16px; }
  .portada > .ph figcaption, .hero > .ph figcaption { display: none; }

  .page-head { padding: calc(var(--nav-h) + 64px) 0 48px; }
  .principios { grid-template-columns: 1fr; }
  .principio, .principio:nth-child(even) { padding: 28px 0; border-left: 0; grid-template-columns: 48px 1fr; }
  .principio h3 { font-size: 24px; }
  .equipo { grid-template-columns: 1fr; gap: 48px; }
  .entrada { grid-template-columns: 1fr; gap: 24px; padding: 40px 0; }
  .contacto-grid { grid-template-columns: 1fr; gap: 56px; }
  .form { grid-template-columns: 1fr; gap: 28px; }
  .etapas { grid-template-columns: 1fr; }
  .footer__top { grid-template-columns: 1fr; gap: 40px; }
  .footer__aviso { flex-direction: column; align-items: flex-start; gap: 14px; }
  .footer__base { flex-direction: column; }
}