/* =========================================================
   STANDO — King Design
   Sistema visual derivado del manual de identidad:
   70% neutros · 20% Azul Petróleo · 10% Lime KING
   ========================================================= */

:root {
  /* Color de marca */
  --lienzo: #f8f7f2;        /* neutro principal (70%) */
  --blanco: #ffffff;
  --petroleo: #0b4550;      /* estructura (20%) */
  --petroleo-hondo: #072f37;
  --lime: #e6ff2a;          /* señal (10%) */
  --grafito: #898a8e;

  /* Derivados funcionales (texto y líneas con contraste AA) */
  --tinta: #0b4550;
  --texto: #2f4a50;
  --texto-suave: #5a6b6f;
  --linea: #d9dcd6;
  --linea-oscura: rgba(248, 247, 242, 0.18);
  --texto-claro: #f8f7f2;
  --texto-claro-suave: #b9cbcd;
  --error: #b42318;

  /* Tipografía: Gotham Black → Montserrat 900, Adobe Arabic → Crimson Pro, Open Sans */
  --f-display: "Montserrat", "Gotham", system-ui, sans-serif;
  --f-serif: "Crimson Pro", "Adobe Arabic", Georgia, serif;
  --f-texto: "Open Sans", system-ui, sans-serif;

  /* Escala tipográfica (razón 1.25, fluida) */
  --t-xs: 0.8125rem;
  --t-sm: 0.9375rem;
  --t-base: 1.0625rem;
  --t-md: 1.25rem;
  --t-lg: clamp(1.5rem, 1.2rem + 1vw, 1.875rem);
  --t-xl: clamp(2rem, 1.4rem + 2.2vw, 3rem);
  --t-2xl: clamp(2.6rem, 1.6rem + 4vw, 4.75rem);
  --t-hero: clamp(3rem, 1.4rem + 5.2vw, 6.25rem);

  /* Espaciado (ritmo de 8) */
  --s-1: 0.5rem;
  --s-2: 1rem;
  --s-3: 1.5rem;
  --s-4: 2rem;
  --s-5: 3rem;
  --s-6: 4.5rem;
  --s-7: clamp(4.5rem, 3rem + 6vw, 8.5rem);

  /* La "tesela" STANDO: radio grande en tres esquinas, una esquina recta,
     como las letras D y O del logotipo. */
  --r: 28px;
  --r-sm: 14px;
  --tesela: var(--r) var(--r) var(--r) 0;
  --tesela-sm: var(--r-sm) var(--r-sm) var(--r-sm) 0;

  --ancho: 1240px;
  --gutter: clamp(1rem, 0.5rem + 2.5vw, 2.5rem);
  --header-h: 76px;

  --ease: cubic-bezier(0.2, 0.7, 0.1, 1);
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1rem);
}

body {
  margin: 0;
  background: var(--lienzo);
  color: var(--texto);
  font-family: var(--f-texto);
  font-size: var(--t-base);
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

[hidden] { display: none !important; }

img, svg { display: block; max-width: 100%; }
img { height: auto; }

a { color: inherit; }

button, input, select, textarea { font: inherit; color: inherit; }

:focus-visible {
  outline: 3px solid var(--lime);
  outline-offset: 3px;
  box-shadow: 0 0 0 6px var(--petroleo);
  border-radius: 4px;
}

.nw { white-space: nowrap; }

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

.saltar {
  position: absolute;
  left: var(--gutter);
  top: -100px;
  z-index: 100;
  padding: 0.75rem 1.25rem;
  background: var(--lime);
  color: var(--petroleo);
  font-weight: 700;
  border-radius: var(--tesela-sm);
}
.saltar:focus { top: 0.75rem; }

.contenedor {
  width: 100%;
  max-width: var(--ancho);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- Tipografía ---------- */

.display {
  font-family: var(--f-display);
  font-weight: 900;
  letter-spacing: -0.035em;
  line-height: 0.94;
  color: var(--tinta);
  margin: 0;
}

/* Firma tipográfica del manual: palabra en Gotham + palabra en serif desplazada
   ("Key Visual", "Redes Sociales", "Merch Publicitario"). */
.firma {
  display: inline-grid;
  margin: 0;
  color: var(--tinta);
  line-height: 0.9;
}
.firma__a {
  font-family: var(--f-display);
  font-weight: 900;
  font-size: var(--t-2xl);
  letter-spacing: -0.035em;
}
.firma__b {
  font-family: var(--f-serif);
  font-weight: 500;
  font-size: calc(var(--t-2xl) * 0.82);
  letter-spacing: -0.01em;
  padding-left: 0.9em;
  margin-top: -0.06em;
}
.oscuro .firma { color: var(--texto-claro); }

.lead {
  font-size: var(--t-md);
  line-height: 1.6;
  max-width: 34em;
  color: var(--texto);
}

p { margin: 0 0 1em; max-width: 65ch; }

/* ---------- Botones ---------- */

.btn {
  --btn-bg: var(--lime);
  --btn-fg: var(--petroleo);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  min-height: 52px;
  padding: 0.85rem 1.6rem;
  border: 2px solid var(--btn-bg);
  border-radius: var(--tesela-sm);
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-family: var(--f-display);
  font-weight: 800;
  font-size: 0.98rem;
  letter-spacing: -0.005em;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.18s var(--ease), background-color 0.18s, color 0.18s, border-color 0.18s;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--petroleo { --btn-bg: var(--petroleo); --btn-fg: var(--texto-claro); }
.btn--petroleo:hover { --btn-bg: var(--petroleo-hondo); }

.btn--linea {
  background: transparent;
  color: var(--petroleo);
  border-color: var(--petroleo);
}
.btn--linea:hover { background: var(--petroleo); color: var(--texto-claro); }

.oscuro .btn--linea { color: var(--texto-claro); border-color: rgba(248, 247, 242, 0.5); }
.oscuro .btn--linea:hover { background: var(--texto-claro); color: var(--petroleo); border-color: var(--texto-claro); }

.btn[disabled] { opacity: 0.55; cursor: not-allowed; transform: none; }

/* ---------- Header ---------- */

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(248, 247, 242, 0.88);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s;
}
.header.con-borde { border-bottom-color: var(--linea); }

.header__fila {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-3);
  height: var(--header-h);
}

.marca { display: inline-flex; align-items: center; gap: 0.75rem; text-decoration: none; }
.marca svg { width: 92px; height: auto; }
.marca__sub {
  font-family: var(--f-serif);
  font-size: 1.05rem;
  color: var(--petroleo);
  line-height: 1;
  padding-left: 0.75rem;
  border-left: 1px solid var(--linea);
}

.logo .l-top { fill: var(--petroleo); }
.logo .l-bot { fill: var(--petroleo); }
.logo--claro .l-top { fill: var(--texto-claro); }
.logo--claro .l-bot { fill: var(--lime); }

.nav { display: flex; align-items: center; gap: var(--s-4); }
.nav__links { display: flex; gap: var(--s-3); list-style: none; margin: 0; padding: 0; }
.nav__links a {
  font-weight: 600;
  font-size: var(--t-sm);
  text-decoration: none;
  color: var(--tinta);
  padding: 0.5rem 0;
  background: linear-gradient(var(--petroleo), var(--petroleo)) left bottom / 0 2px no-repeat;
  transition: background-size 0.25s var(--ease);
}
.nav__links a:hover { background-size: 100% 2px; }

.nav__toggle {
  display: none;
  width: 48px; height: 48px;
  border: 1.5px solid var(--petroleo);
  border-radius: var(--tesela-sm);
  background: transparent;
  cursor: pointer;
  align-items: center; justify-content: center;
}
.nav__toggle span,
.nav__toggle span::before,
.nav__toggle span::after {
  content: ""; display: block;
  width: 20px; height: 2px;
  background: var(--petroleo);
  position: relative;
  transition: transform 0.2s;
}
.nav__toggle span::before { position: absolute; top: -6px; }
.nav__toggle span::after { position: absolute; top: 6px; }
.nav__toggle[aria-expanded="true"] span { background: transparent; }
.nav__toggle[aria-expanded="true"] span::before { transform: translateY(6px) rotate(45deg); }
.nav__toggle[aria-expanded="true"] span::after { transform: translateY(-6px) rotate(-45deg); }

/* ---------- Hero ---------- */

.hero {
  position: relative;
  padding-block: clamp(2.5rem, 1rem + 5vw, 5.5rem) var(--s-7);
  overflow: hidden;
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: clamp(2rem, 1rem + 4vw, 5rem);
  align-items: center;
}

.hero__titulo {
  font-size: var(--t-hero);
  margin-bottom: var(--s-4);
}
.hero__titulo .linea { display: block; }
.hero__titulo .cuadro {
  display: inline-block;
  width: 0.34em; height: 0.3em;
  margin-left: 0.08em;
  background: var(--lime);
  border-radius: 0.06em;
  vertical-align: 0.62em;
}

.hero__texto { margin-bottom: var(--s-4); }

.hero__acciones { display: flex; flex-wrap: wrap; gap: var(--s-2); margin-bottom: var(--s-4); }

.garantias {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-1) var(--s-4);
  list-style: none;
  margin: 0;
  padding: var(--s-3) 0 0;
  border-top: 1px solid var(--linea);
  font-size: var(--t-sm);
  color: var(--texto-suave);
}
.garantias li { display: flex; align-items: center; gap: 0.55rem; }
.garantias li::before {
  content: "";
  width: 9px; height: 8px;
  background: var(--petroleo);
  border-radius: 2px;
  flex: none;
}

/* Marcos concéntricos (pág. 13 del manual) con líneas de construcción */
.escena {
  position: relative;
  aspect-ratio: 1 / 1.02;
  isolation: isolate;
}
.escena__marco {
  position: absolute;
  border-radius: 46px 46px 46px 0;
  background: var(--petroleo);
}
.escena__marco--1 { inset: 0; opacity: 0.1; }
.escena__marco--2 { inset: 5.5%; opacity: 0.16; }
.escena__marco--3 { inset: 11%; opacity: 1; overflow: hidden; }
.escena__marco--3 img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.escena__marco--3::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(200deg, rgba(11, 69, 80, 0) 45%, rgba(11, 69, 80, 0.45));
}

.escena__linea {
  position: absolute;
  background: var(--petroleo);
  opacity: 0.55;
  z-index: 2;
}
.escena__linea--h { height: 1px; left: -12%; right: 30%; top: 22%; transform-origin: left; }
.escena__linea--v { width: 1px; top: -6%; bottom: 18%; right: 8%; transform-origin: top; }

.escena__plano {
  position: absolute;
  z-index: 3;
  right: -4%;
  bottom: 3%;
  width: 46%;
  padding: 0.75rem;
  background: rgba(248, 247, 242, 0.94);
  border: 1px solid var(--linea);
  border-radius: var(--tesela);
  box-shadow: 0 24px 50px -24px rgba(7, 47, 55, 0.45);
}
.escena__plano figcaption {
  font-size: var(--t-xs);
  color: var(--texto-suave);
  padding: 0.25rem 0.4rem 0;
  line-height: 1.4;
}

.iso polygon { stroke: var(--petroleo); stroke-width: 1.3; stroke-linejoin: round; }
.iso .f-top { fill: var(--blanco); }
.iso .f-r { fill: #e9eeee; }
.iso .f-l { fill: #d5e0e1; }
.iso .f-screen { fill: var(--petroleo); }
.iso .f-lime,
.iso .f-lime-top { fill: var(--lime); }

/* Coreografía única de carga: los marcos se construyen hacia afuera */
@media (prefers-reduced-motion: no-preference) {
  .js .escena__marco--3 { animation: marco 0.9s var(--ease) both; }
  .js .escena__marco--2 { animation: marco 0.9s 0.12s var(--ease) both; }
  .js .escena__marco--1 { animation: marco 0.9s 0.24s var(--ease) both; }
  .js .escena__linea--h { animation: trazo-h 1s 0.55s var(--ease) both; }
  .js .escena__linea--v { animation: trazo-v 1s 0.65s var(--ease) both; }
  .js .escena__plano { animation: plano 0.8s 0.85s var(--ease) both; }
  .js .iso polygon { animation: dibujo 1.4s 0.9s ease-out both; stroke-dasharray: 600; }
}
@keyframes marco { from { transform: scale(0.92); opacity: 0; } }
@keyframes trazo-h { from { transform: scaleX(0); } }
@keyframes trazo-v { from { transform: scaleY(0); } }
@keyframes plano { from { transform: translateY(18px); opacity: 0; } }
@keyframes dibujo { from { stroke-dashoffset: 600; fill-opacity: 0; } 60% { fill-opacity: 0; } }

/* ---------- Secciones ---------- */

.seccion { padding-block: var(--s-7); }

.oscuro {
  background: var(--petroleo);
  color: var(--texto-claro-suave);
}
.oscuro .display { color: var(--texto-claro); }
.oscuro .lead { color: var(--texto-claro-suave); }

.cabecera {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--s-4) var(--s-6);
  align-items: end;
  margin-bottom: var(--s-6);
}
.cabecera p { margin: 0; }

/* Manifiesto */
.manifiesto { position: relative; overflow: hidden; }
.manifiesto__patron {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 316 146'%3E%3Cg fill='%23f8f7f2' fill-rule='evenodd'%3E%3Cpath d='M0 0H158V70A74 74 0 0 1 84 144H0ZM33 33H121V70A40 40 0 0 1 81 110H33Z'/%3E%3Cpath d='M187 0H305V104A40 40 0 0 1 265 144H187A40 40 0 0 1 147 104V40A40 40 0 0 1 187 0ZM188 33H264A8 8 0 0 1 272 41V102A8 8 0 0 1 264 110H188A8 8 0 0 1 180 102V41A8 8 0 0 1 188 33Z' transform='translate(11 0)'/%3E%3C/g%3E%3C/svg%3E");
  background-size: 190px auto;
}
.manifiesto .contenedor { position: relative; }
.manifiesto__frase {
  font-size: var(--t-2xl);
  max-width: 13em;
  margin-bottom: var(--s-5);
}
.manifiesto__cuerpo {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--s-5);
  margin-bottom: var(--s-6);
}
.manifiesto__cuerpo p { font-size: var(--t-md); color: var(--texto-claro-suave); }
.manifiesto__cuerpo p strong { color: var(--texto-claro); font-weight: 600; }

/* La ecuación de marca: IDEA + ESTRUCTURA + EXPERIENCIA + VERSATILIDAD = STANDO */
.ecuacion {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr)) auto;
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--linea-oscura);
}
.ecuacion li {
  position: relative;
  padding: var(--s-4) var(--s-3) 0 0;
}
.ecuacion li + li { padding-left: var(--s-3); border-left: 1px solid var(--linea-oscura); }
.ecuacion li:not(:last-child)::after {
  content: "+";
  position: absolute;
  right: -0.42em;
  top: -0.68em;
  z-index: 1;
  font-family: var(--f-display);
  font-weight: 900;
  font-size: 1.5rem;
  color: var(--lime);
  background: var(--petroleo);
  padding-inline: 0.15em;
  line-height: 1.2;
}
.ecuacion li:nth-last-child(2)::after { content: "="; }
.ecuacion svg { width: 46px; height: 46px; margin-bottom: var(--s-2); color: var(--texto-claro); }
.ecuacion h3 {
  font-family: var(--f-serif);
  font-weight: 600;
  font-size: var(--t-lg);
  color: var(--texto-claro);
  margin: 0 0 0.35rem;
  line-height: 1.1;
}
.ecuacion p { font-size: var(--t-sm); margin: 0; color: var(--texto-claro-suave); }
.ecuacion__total { display: flex; align-items: center; }
.ecuacion__total svg { width: 120px; height: auto; margin: 0; }

/* ---------- Páginas internas ---------- */

.pagina {
  padding-block: clamp(3rem, 2rem + 4vw, 6rem) clamp(2.5rem, 1.5rem + 3vw, 4.5rem);
  border-bottom: 1px solid var(--linea);
}
.pagina__fila {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: var(--s-4) var(--s-6);
  align-items: end;
}
.pagina__fila .lead { margin: 0; }
.firma--h1 .firma__a { font-size: clamp(2.8rem, 1.4rem + 4.4vw, 5.5rem); }
.firma--h1 .firma__b { font-size: clamp(2.2rem, 1.1rem + 3.4vw, 4.25rem); white-space: nowrap; }
.cotizar .firma--h1 .firma__a { font-size: var(--t-2xl); }
.cotizar .firma--h1 .firma__b { font-size: calc(var(--t-2xl) * 0.82); }

.indice { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: var(--s-3); }
.indice a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.4rem 0.95rem;
  border: 1.5px solid #c4d2d4;
  border-radius: 12px 12px 12px 0;
  font-size: var(--t-sm);
  font-weight: 600;
  color: var(--petroleo);
  text-decoration: none;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}
.indice a:hover { background: var(--petroleo); border-color: var(--petroleo); color: var(--texto-claro); }

/* ---------- Inicio: resumen de servicios ---------- */

.resumen__lista {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--linea);
  border-bottom: 1px solid var(--linea);
}
.resumen__lista li + li { border-left: 1px solid var(--linea); }
.resumen__lista a {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  height: 100%;
  padding: var(--s-4) var(--s-3);
  color: var(--texto);
  text-decoration: none;
  transition: background-color 0.2s;
}
.resumen__lista a:hover { background: var(--blanco); }
.resumen__lista svg { width: 44px; height: 44px; color: var(--petroleo); margin-bottom: var(--s-1); }
.resumen__lista h3 {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: var(--t-md);
  letter-spacing: -0.015em;
  line-height: 1.15;
  color: var(--tinta);
  margin: 0;
}
.resumen__lista p { margin: 0; font-size: var(--t-sm); }
.resumen__mas {
  margin-top: auto;
  padding-top: var(--s-2);
  font-size: var(--t-sm);
  font-weight: 700;
  color: var(--petroleo);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 5px;
}

/* Inicio: manifiesto corto */
.manifiesto-corto { padding-block: var(--s-6); }
.manifiesto-corto__fila {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
  gap: var(--s-5);
  align-items: end;
}
.manifiesto-corto .manifiesto__frase { margin: 0; font-size: var(--t-xl); max-width: 15em; }
.manifiesto-corto p { font-size: var(--t-md); color: var(--texto-claro-suave); }

/* Inicio: arranque rápido del cotizador */
.inicio-rapido { background: var(--lime); color: var(--petroleo); padding-block: var(--s-6); }
.inicio-rapido__fila {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: var(--s-5);
  align-items: center;
}
.inicio-rapido .display { font-size: var(--t-xl); margin-bottom: var(--s-2); }
.inicio-rapido p { margin: 0; color: var(--petroleo); }

.chips-enlace { display: flex; flex-wrap: wrap; gap: 0.6rem; list-style: none; margin: 0; padding: 0; }
.chips-enlace a {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 52px;
  padding: 0.8rem 1.2rem;
  background: var(--petroleo);
  color: var(--texto-claro);
  border-radius: 14px 14px 14px 0;
  text-decoration: none;
  font-family: var(--f-display);
  font-weight: 800;
  font-size: 0.98rem;
  transition: transform 0.18s var(--ease), background-color 0.18s;
}
.chips-enlace a::before { content: ""; width: 8px; height: 7px; background: var(--lime); border-radius: 2px; }
.chips-enlace a:hover { transform: translateY(-2px); background: var(--petroleo-hondo); }

/* ---------- Servicios: detalle ---------- */

.detalles .contenedor { display: grid; gap: var(--s-7); }
.detalle {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2rem, 1rem + 4vw, 5rem);
  align-items: center;
  scroll-margin-top: calc(var(--header-h) + 1.5rem);
}
.detalle:nth-child(even) .detalle__media { order: 2; }
.detalle__media {
  margin: 0;
  overflow: hidden;
  aspect-ratio: 6 / 5;
  border-radius: var(--tesela);
  background: #dfe5e5;
}
.detalle__media img { width: 100%; height: 100%; object-fit: cover; }
.detalle__media--plano {
  display: grid;
  place-items: center;
  padding: clamp(1.5rem, 1rem + 3vw, 3.5rem);
  background: var(--blanco);
  border: 1px solid var(--linea);
}
.detalle__media--plano svg { width: 100%; height: 100%; }
.detalle__texto h2 {
  font-family: var(--f-display);
  font-weight: 900;
  font-size: var(--t-xl);
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--tinta);
  margin: 0 0 var(--s-3);
}
.detalle__texto .lead { margin-bottom: var(--s-4); }
.detalle__listas {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-4);
  padding-top: var(--s-3);
  margin-bottom: var(--s-4);
  border-top: 1px solid var(--linea);
}
.detalle__listas h3 {
  font-family: var(--f-serif);
  font-weight: 600;
  font-size: 1.3rem;
  color: var(--tinta);
  margin: 0 0 var(--s-1);
}

.lista { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.5rem; font-size: var(--t-sm); }
.lista li { position: relative; padding-left: 1.25rem; }
.lista li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.62em;
  width: 8px; height: 7px;
  border-radius: 2px;
  background: var(--grafito);
}
.lista--check li::before { background: var(--petroleo); }

.iso .f-piso { fill: #eef1ef; stroke-opacity: 0.5; }
.iso .f-vidrio { fill: var(--blanco); fill-opacity: 0.35; }

/* Servicios: formatos en planta */
.plantas { background: var(--blanco); scroll-margin-top: var(--header-h); }
.plantas__lista {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--s-4);
  list-style: none;
  margin: 0;
  padding: 0;
}
.planta { display: flex; flex-direction: column; gap: 0.4rem; }
.planta svg {
  width: 100%;
  max-width: 220px;
  aspect-ratio: 1;
  margin-bottom: var(--s-2);
  padding: 14px;
  background: var(--lienzo);
  border-radius: var(--tesela);
}
.p-borde { fill: none; stroke: var(--petroleo); stroke-width: 1.5; stroke-dasharray: 5 4; }
.p-muro { fill: none; stroke: var(--petroleo); stroke-width: 7; stroke-linecap: round; stroke-linejoin: round; }
.p-nucleo { fill: var(--lime); stroke: var(--petroleo); stroke-width: 1.5; }
.p-flujo { stroke: var(--grafito); stroke-width: 2; stroke-linecap: round; }
.planta h3 {
  font-family: var(--f-display);
  font-weight: 900;
  font-size: var(--t-lg);
  letter-spacing: -0.02em;
  line-height: 1.1;
  color: var(--tinta);
  margin: 0;
}
.planta p { font-size: var(--t-sm); margin: 0; }
.planta .planta__frentes { font-family: var(--f-serif); font-size: 1.2rem; color: var(--petroleo); }
.planta a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: auto;
  padding-top: var(--s-1);
  font-weight: 700;
  font-size: var(--t-sm);
  color: var(--petroleo);
  text-underline-offset: 4px;
}

/* ---------- Proceso: etapas (secuencia real, por eso va numerada) ---------- */

.etapas { list-style: none; margin: 0; padding: 0; counter-reset: etapa; border-top: 2px solid var(--petroleo); }
.etapa {
  counter-increment: etapa;
  display: grid;
  grid-template-columns: 80px minmax(0, 1.1fr) minmax(0, 1fr);
  gap: var(--s-4);
  padding-block: var(--s-5);
  border-bottom: 1px solid var(--linea);
}
.etapa::before {
  content: counter(etapa);
  width: 56px; height: 56px;
  display: grid; place-items: center;
  background: var(--petroleo);
  color: var(--lime);
  font-family: var(--f-display);
  font-weight: 900;
  font-size: 1.4rem;
  border-radius: 16px 16px 16px 0;
}
.etapa h2 {
  font-family: var(--f-display);
  font-weight: 900;
  font-size: var(--t-lg);
  letter-spacing: -0.025em;
  line-height: 1.1;
  color: var(--tinta);
  margin: 0 0 var(--s-2);
}
.etapa__cuerpo p { margin: 0; }
.etapa__datos { margin: 0; display: grid; gap: var(--s-2); }
.etapa__datos div {
  padding: var(--s-2) var(--s-3);
  background: var(--blanco);
  border: 1px solid var(--linea);
  border-radius: var(--tesela-sm);
}
.etapa__datos dt { font-family: var(--f-serif); font-weight: 600; font-size: 1.15rem; color: var(--tinta); }
.etapa__datos dd { margin: 0.15rem 0 0; font-size: var(--t-sm); }

/* Proceso: planificador de cronograma */
.planificador__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2rem, 1rem + 4vw, 5rem);
  align-items: start;
}
.planificador .lead { margin-top: var(--s-3); }
.planificador__form { margin-top: var(--s-4); }
.planificador .etiqueta { color: var(--texto-claro); }
.planificador__fila { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.planificador__fila .control { flex: 1 1 220px; }
.error-campo--claro { color: #ffb4a8; }

.cronograma {
  min-height: 260px;
  padding: clamp(1.5rem, 1rem + 2vw, 2.5rem);
  background: var(--lienzo);
  color: var(--texto);
  border-radius: 34px 34px 34px 0;
}
.cronograma__vacio { margin: 0; color: var(--texto-suave); }
.cronograma__aviso {
  padding: 0.75rem 1rem;
  background: #fff8d6;
  border-radius: 12px;
  font-size: var(--t-sm);
  color: #5c4a00;
}
.cronograma__lista {
  list-style: none;
  margin: 0 0 var(--s-4) 6px;
  padding: 0;
  border-left: 2px solid var(--petroleo);
}
.cronograma__lista li { position: relative; display: grid; gap: 0.1rem; padding: 0 0 var(--s-3) var(--s-3); }
.cronograma__lista li:last-child { padding-bottom: 0; }
.cronograma__lista li::before {
  content: "";
  position: absolute;
  left: -7px; top: 0.3em;
  width: 12px; height: 11px;
  background: var(--petroleo);
  border-radius: 3px 3px 3px 0;
}
.cronograma__lista li.final::before { background: var(--lime); box-shadow: 0 0 0 2px var(--petroleo); }
.cronograma__lista li.pasado { opacity: 0.55; }
.cronograma__lista time { display: block; font-size: var(--t-xs); font-weight: 700; color: var(--petroleo); }
.cronograma__lista time::first-letter { text-transform: uppercase; }
.cronograma__lista strong { font-family: var(--f-display); font-weight: 800; color: var(--tinta); }
.cronograma__lista span { font-size: var(--t-sm); }

/* ---------- Estudio ---------- */

.principios__lista {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--s-4);
  list-style: none;
  margin: 0;
  padding: 0;
}
.principios__lista li { padding-top: var(--s-3); border-top: 2px solid var(--petroleo); }
.principios__lista h3 {
  font-family: var(--f-serif);
  font-weight: 600;
  font-size: var(--t-xl);
  line-height: 1;
  color: var(--tinta);
  margin: 0 0 var(--s-2);
}
.principios__lista p { margin: 0; }

.estudio-proceso { background: var(--blanco); }
.estudio-proceso__fila {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(2rem, 1rem + 4vw, 5rem);
  align-items: center;
}
.estudio-proceso__plano {
  margin: 0;
  padding: clamp(1rem, 0.5rem + 2vw, 2rem);
  background: var(--lienzo);
  border-radius: var(--tesela);
}
.estudio-proceso .lead { margin: var(--s-3) 0 var(--s-4); }

/* ---------- Cotizador ---------- */

.cotizar { position: relative; overflow: hidden; }
.cotizar__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(2rem, 1rem + 4vw, 5rem);
  align-items: start;
}
.cotizar__lado { position: sticky; top: calc(var(--header-h) + 2rem); }
.cotizar__lado .lead { margin-top: var(--s-3); }

.siguiente {
  list-style: none;
  margin: var(--s-4) 0;
  padding: 0;
  display: grid;
  gap: var(--s-2);
  counter-reset: sig;
}
.siguiente li {
  counter-increment: sig;
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 0.9rem;
  align-items: start;
  color: var(--texto-claro-suave);
  font-size: var(--t-sm);
}
.siguiente li::before {
  content: counter(sig);
  width: 34px; height: 34px;
  display: grid; place-items: center;
  border: 1px solid var(--linea-oscura);
  border-radius: 10px 10px 10px 0;
  font-family: var(--f-display);
  font-weight: 800;
  color: var(--lime);
}
.siguiente strong { display: block; color: var(--texto-claro); font-weight: 600; }

.contacto-directo {
  display: grid;
  gap: 0.6rem;
  padding-top: var(--s-3);
  border-top: 1px solid var(--linea-oscura);
  font-size: var(--t-sm);
}
.contacto-directo a {
  display: inline-flex; align-items: center; gap: 0.6rem;
  color: var(--texto-claro);
  text-decoration: none;
  font-weight: 600;
  min-height: 44px;
}
.contacto-directo a:hover { text-decoration: underline; text-underline-offset: 4px; }
.contacto-directo svg { width: 20px; height: 20px; color: var(--lime); flex: none; }

/* Formulario */
.form {
  background: var(--lienzo);
  color: var(--texto);
  border-radius: 34px 34px 34px 0;
  padding: clamp(1.5rem, 1rem + 2.5vw, 3rem);
  box-shadow: 0 40px 80px -40px rgba(0, 0, 0, 0.5);
}

.progreso { margin-bottom: var(--s-4); }
.progreso ol {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  list-style: none;
  margin: 0; padding: 0;
}
.progreso li {
  font-size: var(--t-xs);
  font-weight: 600;
  color: var(--texto-suave);
  padding-top: 0.7rem;
  border-top: 4px solid var(--linea);
  transition: border-color 0.3s, color 0.3s;
}
.progreso li[aria-current="step"] { color: var(--tinta); border-top-color: var(--petroleo); }
.progreso li.hecho { color: var(--tinta); border-top-color: var(--petroleo); }
.progreso li span { color: var(--texto-suave); font-weight: 400; }

.paso-form { border: 0; margin: 0; padding: 0; min-width: 0; }
.paso-form[hidden] { display: none; }
.paso-form legend {
  font-family: var(--f-display);
  font-weight: 900;
  font-size: var(--t-lg);
  letter-spacing: -0.025em;
  line-height: 1.15;
  color: var(--tinta);
  padding: 0;
  margin-bottom: 0.35rem;
}
.paso-form__ayuda { font-size: var(--t-sm); color: var(--texto-suave); margin-bottom: var(--s-3); }

.campo { margin-bottom: var(--s-3); }
.campos-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 var(--s-2); }

.etiqueta {
  display: block;
  font-weight: 600;
  font-size: var(--t-sm);
  color: var(--tinta);
  margin-bottom: 0.45rem;
}
.etiqueta .opcional { font-weight: 400; color: var(--texto-suave); }

.control {
  width: 100%;
  min-height: 52px;
  padding: 0.8rem 1rem;
  background: var(--blanco);
  border: 1.5px solid #c9cfcc;
  border-radius: 12px;
  font-size: 1rem;
  color: var(--tinta);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.control::placeholder { color: #8a9597; }
.control:hover { border-color: #9fb0b2; }
.control:focus { outline: none; border-color: var(--petroleo); box-shadow: 0 0 0 4px rgba(11, 69, 80, 0.14); }
textarea.control { min-height: 110px; resize: vertical; }
select.control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='9' viewBox='0 0 14 9'%3E%3Cpath d='M1 1l6 6 6-6' stroke='%230b4550' stroke-width='2' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.75rem;
}
.control[aria-invalid="true"] { border-color: var(--error); }
.ayuda { display: block; font-size: var(--t-xs); color: var(--texto-suave); margin-top: 0.4rem; }
.error-campo {
  display: flex; gap: 0.4rem; align-items: center;
  font-size: var(--t-xs);
  font-weight: 600;
  color: var(--error);
  margin-top: 0.4rem;
}
.error-campo[hidden] { display: none; }

/* Opciones tipo chip (radio) */
.opciones { border: 0; padding: 0; margin: 0 0 var(--s-3); min-width: 0; }
.opciones > legend {
  font-family: var(--f-texto);
  font-weight: 600;
  font-size: var(--t-sm);
  color: var(--tinta);
  margin-bottom: 0.55rem;
  padding: 0;
}
.chips { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.chip span {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;
  padding: 0.55rem 1rem;
  border: 1.5px solid #c9cfcc;
  border-radius: 12px 12px 12px 0;
  background: var(--blanco);
  font-size: var(--t-sm);
  font-weight: 600;
  color: var(--tinta);
  transition: border-color 0.15s, background-color 0.15s;
  cursor: pointer;
}
.chip:hover span { border-color: var(--petroleo); }
.chip input:checked + span {
  background: var(--petroleo);
  border-color: var(--petroleo);
  color: var(--texto-claro);
}
.chip input:checked + span::before {
  content: "";
  width: 8px; height: 7px;
  background: var(--lime);
  border-radius: 2px;
}
.chip input:focus-visible + span { outline: 3px solid var(--petroleo); outline-offset: 2px; }
.opciones[aria-invalid="true"] .chip span { border-color: var(--error); }
.opciones > legend .opcional { font-weight: 400; color: var(--texto-suave); }

.check {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 0.75rem;
  align-items: start;
  font-size: var(--t-sm);
  margin-bottom: var(--s-2);
  cursor: pointer;
}
.check input {
  width: 22px; height: 22px;
  margin: 0.15rem 0 0;
  accent-color: var(--petroleo);
  cursor: pointer;
}
.check a { color: var(--petroleo); font-weight: 600; }

.trampa { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.form__nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--s-2);
  margin-top: var(--s-4);
  padding-top: var(--s-3);
  border-top: 1px solid var(--linea);
}
.form__nav .btn--linea { border-color: #c9cfcc; color: var(--petroleo); background: transparent; }
.form__nav .btn--linea:hover { border-color: var(--petroleo); background: var(--petroleo); color: var(--texto-claro); }
.form__nav .btn:only-child { margin-left: auto; }

.resumen-errores {
  border: 1.5px solid var(--error);
  background: #fdf0ef;
  border-radius: 12px;
  padding: 0.85rem 1rem;
  margin-bottom: var(--s-3);
  font-size: var(--t-sm);
  color: #7a1810;
}
.resumen-errores[hidden] { display: none; }
.resumen-errores ul { margin: 0.35rem 0 0; padding-left: 1.2rem; }
.resumen-errores a { color: #7a1810; font-weight: 600; }

.form__exito { text-align: left; }
.form__exito[hidden] { display: none; }
.form__exito .sello {
  width: 64px; height: 64px;
  display: grid; place-items: center;
  background: var(--lime);
  border-radius: 18px 18px 18px 0;
  margin-bottom: var(--s-3);
}
.form__exito .sello svg { width: 30px; height: 30px; color: var(--petroleo); }
.form__exito h3 {
  font-family: var(--f-display);
  font-weight: 900;
  font-size: var(--t-xl);
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--tinta);
  margin: 0 0 var(--s-2);
}
.form__exito .codigo {
  display: inline-block;
  font-weight: 700;
  color: var(--petroleo);
  background: #eef3f3;
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
}

.spinner {
  width: 18px; height: 18px;
  border: 2.5px solid rgba(11, 69, 80, 0.25);
  border-top-color: var(--petroleo);
  border-radius: 50%;
  animation: giro 0.7s linear infinite;
}
@keyframes giro { to { transform: rotate(360deg); } }

/* ---------- FAQ ---------- */

.faq__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: var(--s-6);
  align-items: start;
}
.faq__lista { border-top: 1px solid var(--linea); }
.faq details { border-bottom: 1px solid var(--linea); }
.faq summary {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--s-2);
  padding: var(--s-3) 0;
  min-height: 44px;
  cursor: pointer;
  list-style: none;
  font-family: var(--f-display);
  font-weight: 800;
  font-size: var(--t-md);
  letter-spacing: -0.015em;
  color: var(--tinta);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "";
  flex: none;
  width: 28px; height: 28px;
  border-radius: 9px 9px 9px 0;
  background: #eef3f3 url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M6 0v12M0 6h12' stroke='%230b4550' stroke-width='2'/%3E%3C/svg%3E") center no-repeat;
  transition: transform 0.25s var(--ease), background-color 0.2s;
}
.faq details[open] summary::after { transform: rotate(45deg); background-color: var(--lime); }
.faq details p { padding-bottom: var(--s-3); margin: 0; }

/* ---------- Cierre y footer ---------- */

.cierre {
  background: var(--lime);
  color: var(--petroleo);
  padding-block: var(--s-6);
}
.cierre__fila {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--s-4);
  flex-wrap: wrap;
}
.cierre .display { font-size: var(--t-xl); max-width: 16em; }

.footer {
  background: var(--petroleo-hondo);
  color: var(--texto-claro-suave);
  padding-block: var(--s-6) var(--s-4);
  font-size: var(--t-sm);
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: var(--s-4);
  padding-bottom: var(--s-5);
  border-bottom: 1px solid var(--linea-oscura);
}
.footer .logo { width: 130px; margin-bottom: var(--s-2); }
.footer h2 {
  font-family: var(--f-serif);
  font-weight: 600;
  font-size: 1.2rem;
  color: var(--texto-claro);
  margin: 0 0 var(--s-2);
}
.footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.35rem; }
.footer a { text-decoration: none; display: inline-block; padding-block: 0.2rem; }
.footer a:hover { color: var(--texto-claro); text-decoration: underline; text-underline-offset: 4px; }
.footer__legal {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--s-2);
  padding-top: var(--s-3);
  font-size: var(--t-xs);
}

/* Botón flotante de WhatsApp */
.flotante {
  position: fixed;
  right: max(16px, env(safe-area-inset-right));
  bottom: max(16px, env(safe-area-inset-bottom));
  z-index: 40;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 52px;
  padding: 0.7rem 1.1rem 0.7rem 0.9rem;
  background: var(--petroleo);
  color: var(--texto-claro);
  border-radius: 18px 18px 18px 0;
  text-decoration: none;
  font-weight: 700;
  font-size: var(--t-sm);
  box-shadow: 0 16px 36px -14px rgba(7, 47, 55, 0.7);
  transition: transform 0.2s var(--ease);
}
.flotante:hover { transform: translateY(-2px); }
.flotante svg { width: 22px; height: 22px; color: var(--lime); }

/* Avisos del modo demo */
.aviso-demo {
  margin-top: var(--s-2);
  font-size: var(--t-xs);
  color: var(--texto-suave);
  background: #fff8d6;
  border-radius: 8px;
  padding: 0.5rem 0.75rem;
}

/* ---------- Responsive ---------- */

@media (max-width: 1080px) {
  .resumen__lista { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .resumen__lista li:nth-child(3) { border-left: 0; }
  .resumen__lista li:nth-child(n+3) { border-top: 1px solid var(--linea); }
  .plantas__lista { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: var(--s-5); }
  .etapa { grid-template-columns: 64px minmax(0, 1fr); }
  .etapa__datos { grid-column: 2; grid-template-columns: 1fr 1fr; }
  .ecuacion { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ecuacion li:nth-child(3) { border-left: 0; padding-left: 0; }
  .ecuacion li:nth-child(n+3) { margin-top: var(--s-4); border-top: 1px solid var(--linea-oscura); }
  .ecuacion li:nth-child(2)::after { display: none; }
  .ecuacion__total { grid-column: 1 / -1; padding-top: var(--s-4) !important; border-left: 0 !important; padding-left: 0 !important; }
}

@media (max-width: 900px) {
  :root { --header-h: 66px; }
  .nav__toggle { display: inline-flex; }
  .nav__panel {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    background: var(--lienzo);
    border-bottom: 1px solid var(--linea);
    padding: var(--s-3) var(--gutter) var(--s-4);
    display: none;
  }
  .nav__panel.abierto { display: block; }
  .nav__links { flex-direction: column; gap: 0; margin-bottom: var(--s-3); }
  .nav__links a { display: block; padding: 0.85rem 0; font-size: var(--t-md); border-bottom: 1px solid var(--linea); background: none; }
  .nav__panel .btn { width: 100%; }
  .marca__sub { display: none; }

  .hero__grid,
  .cabecera,
  .cotizar__grid,
  .faq__grid,
  .manifiesto__cuerpo,
  .pagina__fila,
  .detalle,
  .planificador__grid,
  .estudio-proceso__fila,
  .manifiesto-corto__fila,
  .inicio-rapido__fila,
  .principios__lista { grid-template-columns: minmax(0, 1fr); }
  .detalle:nth-child(even) .detalle__media { order: 0; }
  .detalles .contenedor { gap: var(--s-6); }
  .cabecera { gap: var(--s-3); margin-bottom: var(--s-5); }
  .escena { max-width: 560px; width: 100%; margin-inline: auto; }
  .escena__plano { right: 0; }
  .cotizar__lado { position: static; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__grid > :first-child { grid-column: 1 / -1; }
  .faq__grid { gap: var(--s-4); }
}

@media (min-width: 901px) {
  .nav__panel { display: flex; align-items: center; gap: var(--s-4); }
}

@media (max-width: 640px) {
  .campos-2 { grid-template-columns: 1fr; }
  .resumen__lista { grid-template-columns: minmax(0, 1fr); }
  .resumen__lista li + li { border-left: 0; border-top: 1px solid var(--linea); }
  .resumen__lista a { padding-inline: 0; }
  .plantas__lista,
  .detalle__listas { grid-template-columns: minmax(0, 1fr); }
  .etapa { grid-template-columns: minmax(0, 1fr); gap: var(--s-2); }
  .etapa__datos { grid-column: 1; grid-template-columns: minmax(0, 1fr); }
  .chips-enlace a { flex: 1 1 100%; }
  .ecuacion { grid-template-columns: minmax(0, 1fr); }
  .ecuacion li,
  .ecuacion li + li { border-left: 0; padding-left: 0; }
  .ecuacion li:nth-child(n+2) { margin-top: var(--s-3); border-top: 1px solid var(--linea-oscura); }
  .ecuacion li::after { display: none; }
  .hero__acciones .btn { flex: 1 1 100%; }
  .flotante span { display: none; }
  .flotante { padding: 0.75rem; }
  .form__nav { flex-wrap: wrap-reverse; }
  .form__nav .btn { flex: 1 1 100%; }
  .progreso li span { display: none; }
  .escena__plano { width: 44%; padding: 0.4rem; right: -2%; bottom: 2%; }
  .escena__plano figcaption { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
}