/* =========================================================
   AIROS · Construcciones y Proyectos
   Dirección: "De la base a la llave" — la obra va en blanco y
   negro y la casa se gana el color. Firma: extrusión gris.
   ========================================================= */

:root {
  /* Color (manual de marca, lámina 07) */
  --negro: #0B0B0C;
  --grafito: #2A2A2B;
  --hormigon: #8E8E8A;
  --cemento: #C9C8C3;
  --cal: #F4F4F2;
  --ladrillo: #D2603F;      /* 5,1:1 sobre negro; texto negro encima */
  --ladrillo-hondo: #A8432A;/* 5,5:1 sobre cal */
  --cta: var(--cal);
  --cta-texto: var(--negro);
  --extrusion: var(--hormigon);

  /* Tipografía */
  --f-display: 'Archivo', 'Arial Black', sans-serif;
  --f-texto: 'Atkinson Hyperlegible Next', 'Segoe UI', sans-serif;
  --f-tecnica: 'Saira', 'Segoe UI', sans-serif;
  --t-hero: clamp(2.3rem, 5.6vw, 5.6rem);
  --t-titulo: clamp(2.1rem, 5.2vw, 4.4rem);
  --t-frase: clamp(2.2rem, 5.6vw, 5rem);
  --t-cuerpo: clamp(1.0625rem, 1.2vw, 1.25rem);

  /* Espacio y forma */
  --gutter: clamp(16px, 4vw, 64px);
  --seccion: clamp(88px, 13vw, 180px);
  --max: 1320px;
  --radio: 0;
  --sombra: 6px 6px 0 var(--extrusion);

  /* Movimiento */
  --ease: cubic-bezier(.2, .7, .1, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--negro); color: var(--cal);
  font-family: var(--f-texto); font-size: var(--t-cuerpo); line-height: 1.6;
  overflow-x: clip;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
h1, h2, h3, p { margin: 0; }
:focus-visible { outline: 3px solid var(--ladrillo); outline-offset: 3px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.saltar { position: absolute; left: 12px; top: -60px; z-index: 100; background: var(--cal); color: var(--negro); padding: 10px 14px; font-weight: 700; }
.saltar:focus { top: 12px; }
.envoltura { width: 100%; max-width: var(--max); margin-inline: auto; padding-inline: var(--gutter); }

/* ---------- Piezas comunes ---------- */
.etiqueta {
  display: inline-block; font-family: var(--f-tecnica); font-weight: 600;
  font-size: .8rem; letter-spacing: .16em; text-transform: uppercase; color: var(--hormigon);
}
.etiqueta--ladrillo { color: var(--ladrillo); }
.titulo {
  font-family: var(--f-display); font-weight: 800; font-stretch: 125%;
  font-size: var(--t-titulo); line-height: .98; letter-spacing: -.01em; text-transform: uppercase;
  margin-top: 14px;
}
.titulo .linea { padding-bottom: .12em; margin-bottom: -.12em; }
.titulo--largo { font-size: clamp(1.9rem, 3.6vw, 3.2rem); line-height: 1.02; margin-top: 0; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .6em;
  min-height: 56px; padding: 0 26px; border: 0; cursor: pointer; text-decoration: none;
  font-family: var(--f-display); font-weight: 800; font-stretch: 112%; font-size: 1rem;
  letter-spacing: .02em; text-transform: uppercase; border-radius: var(--radio);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), background-color .25s;
}
.btn--cal { background: var(--cta); color: var(--cta-texto); box-shadow: var(--sombra); }
.btn--negro { background: var(--negro); color: var(--cal); box-shadow: 6px 6px 0 var(--hormigon); }
.btn--ladrillo { background: var(--ladrillo); color: var(--negro); box-shadow: 6px 6px 0 var(--ladrillo-hondo); }
.btn--cal:hover, .btn--negro:hover, .btn--ladrillo:hover { transform: translate(3px, 3px); box-shadow: 3px 3px 0 var(--extrusion); }
.btn--ladrillo:hover { box-shadow: 3px 3px 0 var(--ladrillo-hondo); }
.btn--cal:active, .btn--negro:active, .btn--ladrillo:active { transform: translate(6px, 6px); box-shadow: 0 0 0 transparent; }
.btn--linea {
  background: transparent; color: var(--cal); border: 2px solid var(--cal);
  font-family: var(--f-tecnica); font-weight: 600; font-stretch: 100%; font-size: .9rem; letter-spacing: .12em;
}
.btn--linea:hover { background: var(--cal); color: var(--negro); }
.btn--chico { min-height: 44px; padding: 0 18px; font-size: .85rem; box-shadow: 4px 4px 0 var(--extrusion); }

/* Estados iniciales de animación: solo con JS */
.js [data-reveal] { opacity: 0; transform: translateY(26px); }

/* ---------- Cabecera ---------- */
.cab {
  position: fixed; inset: 0 0 auto; z-index: 50; display: flex; align-items: center; gap: 28px;
  padding: max(14px, env(safe-area-inset-top)) var(--gutter) 14px;
  transition: background-color .35s, border-color .35s; border-bottom: 1px solid transparent;
}
.cab.is-solida { background: rgba(11, 11, 12, .94); border-color: var(--grafito); }
.cab__logo img { width: auto; height: 34px; }
.cab__nav { display: flex; gap: 26px; margin-left: auto; }
.cab__nav a {
  font-family: var(--f-tecnica); font-weight: 600; font-size: .8rem; letter-spacing: .14em;
  text-transform: uppercase; text-decoration: none; color: var(--cemento); padding: 12px 0; white-space: nowrap;
}
.cab .btn--chico { white-space: nowrap; }
.cab__nav a:hover { color: var(--cal); }
@media (max-width: 1080px) {
  .cab__nav { display: none; }
  .cab .btn--chico { margin-left: auto; }
}
@media (max-width: 420px) {
  .cab__logo img { height: 28px; }
  .cab .btn--chico { padding: 0 12px; font-size: .74rem; }
}

/* ---------- Hero ---------- */
.hero { position: relative; height: var(--hero-h, 100svh); background: var(--negro); }
.hero__pin { position: sticky; top: 0; height: 100svh; overflow: hidden; }
.hero__cuadros, .hero__video { position: absolute; inset: 0; filter: grayscale(var(--gris, 1)) contrast(calc(1 + var(--gris, 1) * .18)); }
.hero__cuadro, .hero__video video, .hero__video canvas { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero__cuadro + .hero__cuadro { opacity: 0; }
.hero__video { opacity: 0; transition: opacity .4s; }
.hero__video.is-listo { opacity: 1; }
.hero__velo {
  position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(90deg, rgba(11,11,12,.78) 0%, rgba(11,11,12,.35) 42%, rgba(11,11,12,0) 70%),
    linear-gradient(0deg, rgba(11,11,12,.6) 0%, rgba(11,11,12,0) 30%);
}
.hero__grano {
  position: absolute; inset: -50%; pointer-events: none; opacity: .06; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.hero__texto {
  position: absolute; left: var(--gutter); top: 50%; transform: translateY(-50%);
  max-width: min(860px, calc(100% - 2 * var(--gutter) - 150px)); display: flex; flex-direction: column; gap: 20px;
}
.js .hero__texto:not(.hero__texto--intro) { opacity: 0; visibility: hidden; }
.no-js .hero__texto:not(.hero__texto--intro), .no-js .hero__cota { display: none; }
.hero__titulo {
  font-family: var(--f-display); font-weight: 800; font-stretch: 125%; font-size: var(--t-hero);
  line-height: .95; letter-spacing: -.015em; text-transform: uppercase;
  text-shadow: 0 2px 30px rgba(0,0,0,.35);
}
.hero__titulo .linea { padding-bottom: .1em; margin-bottom: -.1em; }
.hero__bajada { max-width: 500px; color: var(--cemento); font-size: clamp(1.05rem, 1.3vw, 1.25rem); }
.hero__frase {
  font-family: var(--f-display); font-weight: 800; font-stretch: 125%; font-size: var(--t-frase);
  line-height: .96; text-transform: uppercase; text-shadow: 0 2px 30px rgba(0,0,0,.35);
}
.hero__texto > .btn { align-self: flex-start; }
.hero__acciones { display: flex; flex-wrap: wrap; gap: 16px 18px; margin-top: 6px; }
.hero .etiqueta { color: var(--cal); background: var(--negro); padding: 6px 10px; align-self: flex-start; }

/* Cota de avance: la línea de plano que mide cuánto se construyó */
.hero__cota {
  position: absolute; right: var(--gutter); top: 50%; transform: translateY(-50%);
  display: flex; gap: 14px; align-items: stretch; height: min(46vh, 380px);
}
.hero__cota-linea { position: relative; width: 1px; background: rgba(244,244,242,.25); }
.hero__cota-linea::before, .hero__cota-linea::after { content: ''; position: absolute; left: -5px; width: 11px; height: 1px; background: var(--cal); }
.hero__cota-linea::before { top: 0; } .hero__cota-linea::after { bottom: 0; }
.hero__cota-avance { position: absolute; left: -1px; top: 0; width: 3px; height: 100%; background: var(--ladrillo); transform-origin: top; transform: scaleY(var(--avance, 0)); }
.hero__etapas { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; justify-content: space-between; }
.hero__etapas li {
  font-family: var(--f-tecnica); font-weight: 600; font-size: .72rem; letter-spacing: .16em; text-transform: uppercase;
  color: rgba(244,244,242,.55); transition: color .3s;
}
.hero__etapas li.is-on { color: var(--cal); }
.hero__pista {
  position: absolute; left: 50%; bottom: max(26px, env(safe-area-inset-bottom)); transform: translateX(-50%);
  font-family: var(--f-tecnica); font-weight: 600; font-size: .75rem; letter-spacing: .18em; text-transform: uppercase; color: var(--cemento);
}
.hero__pista::after { content: ''; display: block; width: 1px; height: 34px; margin: 10px auto 0; background: var(--cemento); animation: pista 1.8s var(--ease) infinite; transform-origin: top; }
@keyframes pista { 0% { transform: scaleY(0); } 60% { transform: scaleY(1); opacity: 1; } 100% { transform: scaleY(1); opacity: 0; } }

@media (max-width: 860px) {
  /* En celular la casa es muy ancha para un recorte vertical: el video va en un bloque 4:3 arriba y el texto debajo */
  .hero__cuadros, .hero__video { inset: auto 0 auto 0; top: calc(64px + env(safe-area-inset-top)); height: 75vw; }
  .hero__velo { background: linear-gradient(180deg, rgba(11,11,12,0) 0, rgba(11,11,12,0) calc(64px + 60vw), var(--negro) calc(64px + 75vw)); }
  .hero__texto { top: calc(64px + env(safe-area-inset-top) + 75vw + 22px); right: var(--gutter); max-width: none; bottom: auto; transform: none; gap: 14px; }
  .hero__titulo { font-size: clamp(2rem, 10.4vw, 3.4rem); font-stretch: 110%; }
  .hero__frase { font-size: clamp(1.7rem, 8.2vw, 3rem); font-stretch: 108%; overflow-wrap: anywhere; }
  .hero__bajada { font-size: 1rem; }
  .hero__etapas li:not(.is-on) { opacity: 0; }
  .hero__cota { display: none; }
  .hero__etapas li { font-size: .62rem; }
  .hero__pista { display: none; }
  .hero__acciones .btn { flex: 1 1 100%; }
}

/* ---------- El enemigo ---------- */
.enemigo { padding: var(--seccion) 0; background: var(--negro); border-top: 1px solid var(--grafito); }
.enemigo__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px 64px; align-items: end; }
.enemigo__texto { display: flex; flex-direction: column; gap: 20px; color: var(--cemento); font-size: clamp(1.1rem, 1.5vw, 1.4rem); }
.enemigo__giro { color: var(--cal); font-weight: 700; }
.pilares { list-style: none; margin-top: clamp(56px, 8vw, 110px); display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; }
.pilar { padding: 30px 28px 6px 0; border-top: 1px solid var(--grafito); position: relative; }
.pilar + .pilar { padding-left: 28px; border-left: 1px solid var(--grafito); }
.pilar svg { width: 34px; height: 34px; fill: none; stroke: var(--cal); stroke-width: 2; stroke-linecap: square; margin-bottom: 22px; }
.pilar:last-child svg { stroke: var(--ladrillo); }
.pilar h3 { font-family: var(--f-display); font-weight: 800; font-stretch: 112%; font-size: 1.15rem; text-transform: uppercase; line-height: 1.15; margin-bottom: 10px; }
.pilar p { color: var(--cemento); font-size: 1rem; }
@media (max-width: 960px) {
  .enemigo__grid { grid-template-columns: 1fr; }
  .pilares { grid-template-columns: 1fr 1fr; }
  .pilar:nth-child(3) { border-left: 0; padding-left: 0; }
}
@media (max-width: 560px) {
  .pilares { grid-template-columns: 1fr; }
  .pilar + .pilar { border-left: 0; padding-left: 0; }
  .pilar { display: grid; grid-template-columns: 34px 1fr; column-gap: 18px; padding-bottom: 24px; }
  .pilar svg { grid-row: span 2; margin: 2px 0 0; }
}

/* ---------- Construir ---------- */
.construir { padding: var(--seccion) 0; background: var(--cal); color: var(--negro); }
.construir .etiqueta { color: var(--ladrillo-hondo); }
.construir__grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(40px, 6vw, 96px); align-items: start; }
.construir__intro { display: flex; flex-direction: column; gap: 22px; }
.construir__intro > p { color: var(--grafito); max-width: 520px; }
.construir__precio { color: var(--ladrillo-hondo); font-weight: 700; } /* naranja oscuro: 5,5:1 sobre Cal */
.construir__foto { margin: 12px 0 0; position: relative; box-shadow: 10px 10px 0 var(--cemento); }
.construir__foto img { aspect-ratio: 16 / 10; object-fit: cover; width: 100%; }
.construir__foto figcaption { position: absolute; left: 0; bottom: 0; background: var(--negro); color: var(--cal); padding: 8px 12px; font-family: var(--f-tecnica); font-weight: 600; font-size: .75rem; letter-spacing: .14em; text-transform: uppercase; }

.armador { background: #FFFFFF; border: 1px solid var(--cemento); padding: clamp(22px, 3vw, 40px); display: flex; flex-direction: column; gap: 22px; position: relative; }
.armador::before { content: ''; position: absolute; inset: 0; transform: translate(10px, 10px); background: var(--negro); z-index: -1; }
.armador fieldset { border: 0; margin: 0; padding: 0; }
.armador legend, .campo label { font-family: var(--f-tecnica); font-weight: 600; font-size: .8rem; letter-spacing: .14em; text-transform: uppercase; margin-bottom: 10px; display: block; padding: 0; }
.opciones { display: flex; flex-wrap: wrap; gap: 8px; }
.opciones label { position: relative; cursor: pointer; }
.opciones input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.opciones span {
  display: inline-flex; align-items: center; min-height: 46px; padding: 0 16px; border: 2px solid var(--negro);
  font-weight: 700; font-size: 1rem; transition: background-color .2s, color .2s;
}
.opciones input:checked + span { background: var(--negro); color: var(--cal); }
.opciones input:focus-visible + span { outline: 3px solid var(--ladrillo); outline-offset: 2px; }
.campo input {
  width: 100%; min-height: 50px; padding: 0 14px; border: 2px solid var(--negro); background: var(--cal);
  font: inherit; font-size: 1rem; color: var(--negro); border-radius: 0;
}
.campo input::placeholder { color: #6b6b68; }
.armador__vista { background: var(--cal); border-left: 4px solid var(--ladrillo-hondo); padding: 14px 16px; font-size: .98rem; color: var(--grafito); }
.armador .btn { width: 100%; }
.armador .btn[disabled] { opacity: .6; cursor: progress; }
.campo--sub { margin-top: -8px; padding-left: 14px; border-left: 2px solid var(--negro); }
.campo--sub[hidden] { display: none; }
.campo__unidad { position: relative; max-width: 220px; }
.campo__unidad input { padding-right: 46px; }
.campo__unidad span { position: absolute; right: 14px; top: 50%; transform: translateY(-50%); font-weight: 700; color: var(--grafito); }
.campo__ayuda { margin: -4px 0 10px; font-size: .9rem; color: #55554f; }
.opciones--horas span { min-height: 44px; padding: 0 12px; font-size: .95rem; }
.campo--rango label { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.campo--rango output { white-space: nowrap; font-family: var(--f-display); font-weight: 800; font-stretch: 112%; font-size: 1.25rem; letter-spacing: 0; text-transform: none; color: var(--ladrillo-hondo); }
.campo--rango input[type="range"] {
  -webkit-appearance: none; appearance: none; width: 100%; height: 44px; min-height: 0; margin: 0; padding: 0; border: 0; background: transparent; cursor: pointer;
  --lleno: 25%;
}
.campo--rango input[type="range"]::-webkit-slider-runnable-track { height: 8px; background: linear-gradient(90deg, var(--negro) var(--lleno), var(--cemento) var(--lleno)); }
.campo--rango input[type="range"]::-moz-range-track { height: 8px; background: var(--cemento); }
.campo--rango input[type="range"]::-moz-range-progress { height: 8px; background: var(--negro); }
.campo--rango input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 26px; height: 26px; margin-top: -9px; background: var(--cal); border: 3px solid var(--negro); box-shadow: 3px 3px 0 var(--hormigon); }
.campo--rango input[type="range"]::-moz-range-thumb { width: 22px; height: 22px; border-radius: 0; background: var(--cal); border: 3px solid var(--negro); box-shadow: 3px 3px 0 var(--hormigon); }
.campo--rango input[type="range"]:focus-visible { outline: 3px solid var(--ladrillo); outline-offset: 2px; }
.rango__marcas { display: flex; justify-content: space-between; font-family: var(--f-tecnica); font-weight: 600; font-size: .75rem; letter-spacing: .08em; color: #55554f; }
.campo--trampa { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.campo input[aria-invalid="true"] { border-color: var(--ladrillo-hondo); }
.armador__error { background: #FBE9E4; color: var(--ladrillo-hondo); border-left: 4px solid var(--ladrillo-hondo); padding: 12px 14px; font-weight: 700; font-size: .98rem; }
#cotizar { scroll-margin-top: 90px; }
.armador__nota { font-size: .88rem; color: #55554f; text-align: center; }
@media (max-width: 960px) { .construir__grid { grid-template-columns: 1fr; } }

/* ---------- Proceso ---------- */
.proceso { padding: var(--seccion) 0; position: relative; background: var(--negro); }
.proceso .titulo { margin-bottom: clamp(48px, 7vw, 90px); }
.etapas { list-style: none; margin-bottom: 0; display: flex; flex-direction: column; position: relative; }
.etapa { display: grid; grid-template-columns: minmax(120px, 280px) 1fr; gap: 24px 48px; padding: clamp(26px, 3.5vw, 44px) 0; border-top: 1px solid var(--grafito); align-items: baseline; }
.etapa__n { font-family: var(--f-display); font-weight: 800; font-stretch: 125%; font-size: clamp(3rem, 7vw, 6rem); line-height: .85; color: transparent; -webkit-text-stroke: 1.5px var(--hormigon); }
.etapa h3 { font-family: var(--f-display); font-weight: 800; font-stretch: 112%; font-size: clamp(1.3rem, 2.2vw, 1.9rem); text-transform: uppercase; margin-bottom: 8px; }
.etapa p { color: var(--cemento); max-width: 620px; }
.etapa__n { transition: color .6s var(--ease), text-shadow .6s var(--ease); }
.etapa__n.is-llena, .etapa:last-child .etapa__n { color: var(--cal); -webkit-text-stroke: 0; text-shadow: 5px 5px 0 var(--hormigon); }
.no-js .etapa__n { color: var(--cal); }
.proceso__cota { position: absolute; right: var(--gutter); top: var(--seccion); bottom: var(--seccion); width: 10px; height: calc(100% - 2 * var(--seccion)); }
.proceso__cota path { stroke: var(--ladrillo); stroke-width: 2; fill: none; vector-effect: non-scaling-stroke; }
@media (max-width: 640px) {
  .etapa { grid-template-columns: 1fr; gap: 10px; }
  .proceso__cota { display: none; }
}

/* ---------- Rescate ---------- */
.rescate { position: relative; padding: var(--seccion) 0; background: var(--negro); overflow: hidden; border-top: 6px solid var(--ladrillo); }
.rescate__fondo { position: absolute; inset: 0; }
.rescate__fondo img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(1) contrast(1.3) brightness(.32); }
.rescate__grid { position: relative; display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(40px, 6vw, 96px); align-items: center; }
.rescate__intro { display: flex; flex-direction: column; gap: 22px; align-items: flex-start; }
.rescate__intro p { color: var(--cemento); max-width: 540px; }
.titulo--rescate em { font-style: normal; color: var(--ladrillo); }
.rescate__pasos { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 14px; }
.rescate__pasos li { display: grid; grid-template-columns: 48px 1fr; gap: 18px; background: rgba(11,11,12,.86); border: 1px solid var(--grafito); padding: 22px 24px; }
.rescate__pasos li > span { width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; background: var(--ladrillo); color: var(--negro); font-family: var(--f-display); font-weight: 800; font-size: 1.3rem; box-shadow: 4px 4px 0 var(--ladrillo-hondo); }
.rescate__pasos h3 { font-family: var(--f-display); font-weight: 800; font-stretch: 112%; font-size: 1.1rem; text-transform: uppercase; margin-bottom: 6px; }
.rescate__pasos p { color: var(--cemento); font-size: 1rem; }
@media (max-width: 960px) { .rescate__grid { grid-template-columns: 1fr; } }

/* ---------- Obra en curso ---------- */
.obra { padding: var(--seccion) 0; background: var(--cal); color: var(--negro); }
.obra .etiqueta { color: var(--ladrillo-hondo); }
.obra__cabeza { display: grid; grid-template-columns: 1.2fr 1fr; gap: 32px 64px; align-items: end; margin-bottom: clamp(40px, 5vw, 64px); }
.obra__cabeza > p { color: var(--grafito); }
.comparar { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: var(--grafito); box-shadow: 12px 12px 0 var(--negro); }
.comparar > img, .comparar__antes img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.comparar__antes { position: absolute; inset: 0; clip-path: inset(0 calc(100% - var(--pos)) 0 0); }
.comparar__antes img { filter: grayscale(1) contrast(1.2); }
.comparar__linea { position: absolute; top: 0; bottom: 0; left: var(--pos); width: 4px; margin-left: -2px; background: var(--cal); pointer-events: none; }
.comparar__linea::after { content: '↔'; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 52px; height: 52px; display: flex; align-items: center; justify-content: center; background: var(--cal); color: var(--negro); font-weight: 700; font-size: 1.3rem; box-shadow: 4px 4px 0 var(--hormigon); }
.comparar__tag { position: absolute; top: 16px; padding: 6px 10px; font-family: var(--f-tecnica); font-weight: 600; font-size: .75rem; letter-spacing: .14em; text-transform: uppercase; pointer-events: none; }
.comparar__tag--antes { left: 16px; background: var(--negro); color: var(--cal); }
.comparar__tag--despues { right: 16px; background: var(--cal); color: var(--negro); }
.comparar__rango { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; cursor: ew-resize; margin: 0; }
.comparar__rango:focus-visible + * , .comparar:focus-within { outline: 3px solid var(--ladrillo); outline-offset: 4px; }
.galeria { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 40px; }
.galeria figure { margin: 0; }
.galeria img { aspect-ratio: 4 / 3; object-fit: cover; width: 100%; filter: grayscale(1) contrast(1.2); }
.galeria figcaption { font-family: var(--f-tecnica); font-weight: 600; font-size: .75rem; letter-spacing: .14em; text-transform: uppercase; margin-top: 10px; color: var(--grafito); }
.obra__fecha { margin-top: 26px; font-size: .9rem; color: #55554f; }
@media (max-width: 860px) {
  .obra__cabeza { grid-template-columns: 1fr; }
  .galeria { grid-template-columns: 1fr; }
  .comparar { aspect-ratio: 4 / 3; box-shadow: 8px 8px 0 var(--negro); }
}

/* ---------- Confianza ---------- */
.confianza { padding: calc(var(--seccion) * .7) 0; background: var(--grafito); }
.confianza__grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px 64px; align-items: center; }
.marcador { margin: 0; background: #FFE45C; color: var(--negro); padding: 28px; font-weight: 700; font-size: 1.15rem; }
.credenciales { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 18px; }
.credenciales li { display: flex; flex-direction: column; gap: 4px; padding-bottom: 18px; border-bottom: 1px solid #3a3a3b; font-weight: 700; background: none; }
.credenciales li { color: #FFE45C; }
@media (max-width: 860px) { .confianza__grid { grid-template-columns: 1fr; } }

/* ---------- Preguntas ---------- */
.preguntas { padding: var(--seccion) 0; background: var(--negro); }
.preguntas__grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 40px 80px; align-items: start; }
.acordeon details { border-top: 1px solid var(--grafito); }
.acordeon details:last-child { border-bottom: 1px solid var(--grafito); }
.acordeon summary {
  list-style: none; cursor: pointer; padding: 24px 44px 24px 0; position: relative; min-height: 44px;
  font-family: var(--f-display); font-weight: 700; font-stretch: 110%; font-size: clamp(1.05rem, 1.6vw, 1.3rem);
}
.acordeon summary::-webkit-details-marker { display: none; }
.acordeon summary::after { content: '+'; position: absolute; right: 4px; top: 50%; transform: translateY(-50%); font-size: 1.8rem; font-weight: 400; color: var(--hormigon); transition: transform .3s var(--ease); }
.acordeon details[open] summary::after { transform: translateY(-50%) rotate(45deg); color: var(--ladrillo); }
.acordeon p { padding: 0 0 26px; color: var(--cemento); max-width: 640px; }
@media (max-width: 860px) { .preguntas__grid { grid-template-columns: 1fr; } }

/* ---------- Contacto ---------- */
.contacto { padding: var(--seccion) 0; background: var(--negro); border-top: 1px solid var(--grafito);
  background-image: linear-gradient(#18181a 1px, transparent 1px), linear-gradient(90deg, #18181a 1px, transparent 1px); background-size: 72px 72px; }
.contacto__grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px 96px; align-items: center; }
.contacto__logo { width: min(380px, 70%); }
.contacto__texto { display: flex; flex-direction: column; gap: 24px; }
.contacto__texto > p { color: var(--cemento); max-width: 560px; }
.contacto__acciones { display: flex; flex-wrap: wrap; gap: 18px; }
.contacto__datos { display: grid; grid-template-columns: minmax(0, 320px); gap: 18px; margin: 12px 0 0; }
.contacto__datos div { border-top: 1px solid var(--grafito); padding-top: 12px; }
.contacto__datos dt { font-family: var(--f-tecnica); font-weight: 600; font-size: .75rem; letter-spacing: .14em; text-transform: uppercase; color: var(--hormigon); }
.contacto__datos dd { margin: 4px 0 0; color: #FFE45C; font-weight: 700; font-size: 1rem; }
@media (max-width: 860px) {
  .contacto__grid { grid-template-columns: 1fr; }
  .contacto__logo { width: 220px; }
  .contacto__datos { grid-template-columns: 1fr; }
  .contacto__acciones .btn { flex: 1 1 100%; }
}

/* ---------- Pie y barra fija ---------- */
.pie { padding: 36px 0 calc(36px + 72px); background: var(--negro); border-top: 1px solid var(--grafito); color: var(--hormigon); font-size: .9rem; }
.pie__grid { display: flex; flex-wrap: wrap; gap: 16px 32px; align-items: center; }
.pie img { width: 46px; }
.barra {
  position: fixed; left: 12px; right: 12px; bottom: max(12px, env(safe-area-inset-bottom)); z-index: 40;
  display: none; align-items: center; justify-content: center; gap: .6em; min-height: 56px;
  background: var(--cal); color: var(--negro); text-decoration: none; box-shadow: 5px 5px 0 var(--hormigon);
  font-family: var(--f-display); font-weight: 800; font-stretch: 112%; text-transform: uppercase;
  transition: transform .35s var(--ease), opacity .35s;
}
.barra.is-oculta { transform: translateY(140%); opacity: 0; pointer-events: none; }
@media (max-width: 860px) { .barra { display: flex; } }
@media (min-width: 861px) { .pie { padding-bottom: 36px; } }

/* ---------- Cuadrícula de plano en toda la página ---------- */
/* Misma trama de 72 px que el contacto, centrada para que las líneas sigan de una sección a otra */
.enemigo, .proceso, .preguntas, .contacto, .pie, .construir, .obra, .confianza {
  --plano-linea: #18181a;
  background-image: linear-gradient(var(--plano-linea) 1px, transparent 1px), linear-gradient(90deg, var(--plano-linea) 1px, transparent 1px);
  background-size: 72px 72px;
  background-position: center top;
}
.construir, .obra { --plano-linea: #E3E3DE; }
.confianza { --plano-linea: #333335; }

/* ---------- Menos movimiento ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
}