/* ============================================================
   Constructora 4M SpA — hoja de estilos
   Paleta tomada del logotipo: naranja #F26A21 / grafito #2E353C
   ============================================================ */

:root{
  --naranja:#F26A21;
  --naranja-osc:#D4551A;
  --grafito:#2E353C;
  --grafito-2:#3A424B;
  --tinta:#1B2126;
  --gris:#5C666F;
  --gris-claro:#E7EAED;
  --hueso:#F6F7F8;
  --blanco:#FFFFFF;

  --radio:14px;
  --sombra:0 18px 45px rgba(27,33,38,.10);
  --sombra-fuerte:0 24px 60px rgba(27,33,38,.22);
  --ancho:1160px;
  --titulo:'Barlow Condensed',ui-sans-serif,system-ui,sans-serif;
  --texto:'Inter',ui-sans-serif,system-ui,-apple-system,'Segoe UI',sans-serif;
}

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

/* El atributo hidden debe ganar siempre: sin esto, reglas como .field{display:grid}
   lo anulan y el elemento sigue visible. */
[hidden]{display:none!important}

html{scroll-behavior:smooth;scroll-padding-top:82px}

body{
  margin:0;
  font-family:var(--texto);
  font-size:16.5px;
  line-height:1.7;
  color:var(--gris);
  background:var(--blanco);
  -webkit-font-smoothing:antialiased;
}

img{max-width:100%;display:block}

h1,h2,h3{
  font-family:var(--titulo);
  color:var(--tinta);
  line-height:1.08;
  letter-spacing:.01em;
  margin:0 0 .5em;
  text-transform:uppercase;
}

h1{font-size:clamp(2.6rem,6vw,4.4rem)}
h2{font-size:clamp(2rem,4vw,3rem)}
h3{font-size:1.25rem;text-transform:none;letter-spacing:0;font-family:var(--texto);font-weight:700}

p{margin:0 0 1.1em}

a{color:var(--naranja-osc);text-decoration:none}
a:hover{text-decoration:underline}

.wrap{width:min(100% - 2.5rem,var(--ancho));margin-inline:auto}

.skip-link{
  position:absolute;left:-9999px;top:0;background:var(--naranja);color:#fff;
  padding:.7rem 1.1rem;z-index:200;border-radius:0 0 8px 0;
}
.skip-link:focus{left:0}

:focus-visible{outline:3px solid var(--naranja);outline-offset:3px}

/* ---------- Botones ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  background:var(--naranja);color:#fff;font-weight:600;font-size:.95rem;
  padding:.95rem 1.8rem;border:2px solid var(--naranja);border-radius:999px;
  cursor:pointer;transition:.25s ease;text-decoration:none;
}
.btn:hover{background:var(--naranja-osc);border-color:var(--naranja-osc);text-decoration:none;transform:translateY(-2px)}
.btn--ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn--ghost:hover{background:#fff;color:var(--tinta);border-color:#fff}
.btn--sm{padding:.6rem 1.3rem;font-size:.88rem}

/* ---------- Navegación ---------- */
.nav{
  position:fixed;inset:0 0 auto 0;z-index:100;
  background:rgba(46,53,60,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(255,255,255,.08);
  transition:background .3s ease,box-shadow .3s ease;
}
.nav.is-scrolled{background:rgba(27,33,38,.98);box-shadow:0 6px 24px rgba(0,0,0,.25)}

.nav__inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;height:76px}

.brand{display:flex;align-items:center;gap:.75rem;color:#fff;text-decoration:none}
.brand img{width:46px;height:46px;object-fit:cover;border-radius:50%;background:#fff}
.brand span{display:flex;flex-direction:column;line-height:1.15}
.brand strong{font-family:var(--titulo);font-size:1.3rem;letter-spacing:.03em;text-transform:uppercase}
.brand small{font-size:.72rem;color:rgba(255,255,255,.6);letter-spacing:.08em;text-transform:uppercase}

.nav__links{display:flex;align-items:center;gap:1.6rem}
.nav__links a{color:rgba(255,255,255,.82);font-size:.92rem;font-weight:500}
.nav__links a:hover{color:#fff;text-decoration:none}
.nav__links a.btn{color:#fff}

.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;padding:.6rem;cursor:pointer}
.burger span{width:26px;height:2px;background:#fff;transition:.25s ease}
.burger.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.is-open span:nth-child(2){opacity:0}
.burger.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{position:relative;color:#fff;padding:180px 0 110px;overflow:hidden;background:var(--grafito)}
.hero__bg{position:absolute;inset:0;z-index:0;isolation:isolate;overflow:hidden;background:var(--grafito)}
.hero__bg img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;
  opacity:.30;filter:grayscale(.35);z-index:0;
}
.hero__bg::before{
  content:"";position:absolute;inset:0;z-index:1;
  background:
    radial-gradient(900px 520px at 78% 18%,rgba(242,106,33,.30),transparent 62%),
    linear-gradient(150deg,rgba(36,42,48,.86) 0%,rgba(46,53,60,.80) 48%,rgba(27,33,38,.94) 100%);
}
.hero__bg::after{
  content:"";position:absolute;inset:0;opacity:.35;z-index:2;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(circle at 30% 40%,#000,transparent 75%);
}

.hero__inner{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:3.5rem;align-items:center}

.eyebrow{
  font-size:.78rem;font-weight:700;letter-spacing:.22em;text-transform:uppercase;
  color:var(--naranja);margin:0 0 1rem;
}

.hero h1{color:#fff;margin-bottom:1rem}
.hero h1 span{color:var(--naranja)}
.hero .lead{font-size:1.15rem;color:rgba(255,255,255,.8);max-width:52ch}

.hero__cta{display:flex;flex-wrap:wrap;gap:.9rem;margin:2rem 0 2.6rem}

.hero__stats{list-style:none;display:flex;flex-wrap:wrap;gap:2.4rem;margin:0;padding:1.8rem 0 0;border-top:1px solid rgba(255,255,255,.15)}
.hero__stats li{display:flex;flex-direction:column;max-width:15ch}
.hero__stats strong{font-family:var(--titulo);font-size:2.4rem;color:var(--naranja);line-height:1}
.hero__stats span{font-size:.85rem;color:rgba(255,255,255,.65)}

.hero__logo{display:flex;justify-content:center}
.hero__logo img{
  width:min(100%,380px);border-radius:24px;
  box-shadow:var(--sombra-fuerte);
}

/* ---------- Pilares ---------- */
.pillars{margin-top:-60px;position:relative;z-index:5;padding-bottom:4rem}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:1.5rem}

.card{
  background:#fff;border:1px solid var(--gris-claro);border-radius:var(--radio);
  padding:2rem 1.8rem;box-shadow:var(--sombra);transition:.28s ease;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--sombra-fuerte);border-color:rgba(242,106,33,.4)}
.card__icon{
  width:56px;height:56px;display:grid;place-items:center;border-radius:14px;
  background:rgba(242,106,33,.12);margin-bottom:1.1rem;
}
.card__icon svg{
  width:28px;height:28px;fill:none;stroke:var(--naranja);
  stroke-width:2;stroke-linecap:round;stroke-linejoin:round;
}
.card p{margin:0}

/* ---------- Secciones ---------- */
.section{padding:5.5rem 0}
.section__lead{max-width:70ch;font-size:1.05rem;margin-bottom:2.5rem}
.section--muted{background:var(--hueso)}
.section--dark{background:var(--grafito);color:rgba(255,255,255,.78)}
.section--dark h2,.section--dark h3{color:#fff}

.two-col{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:start}

/* Misión / Visión */
.mv{display:grid;gap:1.2rem}
.mv__box{background:var(--hueso);border-left:4px solid var(--gris-claro);border-radius:0 var(--radio) var(--radio) 0;padding:1.6rem 1.8rem}
.mv__box h3{font-family:var(--titulo);text-transform:uppercase;letter-spacing:.06em;font-size:1.4rem}
.mv__box p{margin:0;font-size:.98rem}
.mv__box--accent{border-left-color:var(--naranja);background:rgba(242,106,33,.07)}

/* Equipamiento */
.equip{padding-bottom:2.5rem}
.equip__img{width:100%;max-width:960px;margin:1.5rem auto 0}

/* Foto real de equipamiento ya instalado.
   La altura se fija explícitamente: la foto original es vertical (1100x1467) y
   sin tope se estira a todo el ancho de la sección. */
.equip__real{
  display:grid;grid-template-columns:minmax(0,420px) minmax(0,1fr);
  gap:2rem;align-items:center;max-width:900px;margin:3rem auto 0;
}
.equip__real img{
  width:100%;height:300px;object-fit:cover;object-position:center 55%;
  border-radius:var(--radio);box-shadow:var(--sombra-fuerte);
}
.equip__real figcaption{
  display:flex;flex-direction:column;align-items:flex-start;
  font-size:.95rem;color:rgba(255,255,255,.74);line-height:1.65;
}

/* Planos y diagramas */
.plano{margin:0 0 3rem;padding:0}
.plano img{width:100%;border-radius:var(--radio);border:1px solid rgba(255,255,255,.12)}
.plano figcaption{
  margin-top:.9rem;font-size:.85rem;color:rgba(255,255,255,.55);
  padding-left:1rem;border-left:3px solid var(--naranja);
}
.plano--light{margin:0}
.plano--light img{border-color:var(--gris-claro);box-shadow:var(--sombra);background:#fff}
.plano--light figcaption{color:var(--gris)}

.diagrama{
  width:100%;max-width:820px;margin:0 auto 3rem;display:block;
  border:1px solid var(--gris-claro);border-radius:var(--radio);box-shadow:var(--sombra);
}

/* Servicios */
.services{gap:1.4rem}
.svc{
  background:var(--grafito-2);border:1px solid rgba(255,255,255,.09);
  border-radius:var(--radio);padding:2rem 1.7rem;transition:.28s ease;
}
.svc:hover{transform:translateY(-6px);border-color:var(--naranja);background:#434C56}
.svc__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:.9rem}
.svc__ico{
  width:34px;height:34px;fill:none;stroke:var(--naranja);
  stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round;
}
.svc__num{font-family:var(--titulo);font-size:2.1rem;color:rgba(255,255,255,.22);line-height:1}
.svc p{margin:0;font-size:.95rem;color:rgba(255,255,255,.72)}

/* Listas con ticks */
.listbox{background:#fff;border:1px solid var(--gris-claro);border-radius:var(--radio);padding:2rem 1.9rem;box-shadow:var(--sombra)}
.listbox h3{margin-bottom:1.1rem}
.ticks{list-style:none;margin:0;padding:0;display:grid;gap:.85rem}
.ticks li{position:relative;padding-left:2rem;font-size:.98rem}
.ticks li::before{
  content:"";position:absolute;left:0;top:.45em;width:1.1rem;height:1.1rem;border-radius:50%;
  background:rgba(242,106,33,.15);
}
.ticks li::after{
  content:"";position:absolute;left:.36rem;top:.62em;width:.32rem;height:.6rem;
  border:solid var(--naranja);border-width:0 2px 2px 0;transform:rotate(45deg);
}

/* Galería de recintos */
/* 6 columnas: fila 1 = dos piezas de 3; fila 2 = tres piezas de 2. Calce exacto. */
.galeria{display:grid;grid-template-columns:repeat(6,1fr);gap:1.3rem}
.gal{margin:0;position:relative;border-radius:var(--radio);overflow:hidden;box-shadow:var(--sombra);grid-column:span 2}
.gal--wide{grid-column:span 3}
.gal img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease;display:block}
.gal img{height:240px}
.gal--wide img{height:330px}
.gal:hover img{transform:scale(1.05)}
.gal figcaption{
  position:absolute;inset:auto 0 0 0;padding:2rem 1.3rem .95rem;
  background:linear-gradient(transparent,rgba(20,25,29,.94));
  display:flex;flex-direction:column;gap:.15rem;align-items:flex-start;
}
.gal figcaption strong{color:#fff;font-size:1.02rem;font-weight:700}
.gal figcaption span{color:rgba(255,255,255,.72);font-size:.83rem}

/* Distintivo de obra real, para no confundirla con las imágenes referenciales */
.gal__tag,.obra__tag{
  align-self:flex-start;background:var(--naranja);color:#fff;
  font-size:.66rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  padding:.28rem .6rem;border-radius:4px;margin-bottom:.45rem;
}
.nota-img{margin:1.4rem 0 0;font-size:.82rem;color:var(--gris);line-height:1.6}
.nota-img strong{color:var(--tinta)}

/* Fotografías de obra (sección de blindaje) */
.obra{margin:0}
.obra img{width:100%;border-radius:var(--radio);box-shadow:var(--sombra);display:block}
.obra figcaption{
  display:flex;flex-direction:column;margin-top:.8rem;font-size:.85rem;color:var(--gris);
  padding-left:1rem;border-left:3px solid var(--naranja);
}
.obra .obra__tag{display:inline-block;width:fit-content}

/* Metodología: foto + diagrama */
.metodo-split{display:grid;grid-template-columns:.85fr 1.15fr;gap:1.6rem;align-items:center;margin-bottom:3rem}
.metodo-split__foto{
  width:100%;height:100%;min-height:300px;object-fit:cover;
  border-radius:var(--radio);box-shadow:var(--sombra);
}
.metodo-split__diag{
  width:100%;border:1px solid var(--gris-claro);border-radius:var(--radio);
  box-shadow:var(--sombra);background:#fff;
}

/* Blindaje: fotos de obra + corte constructivo */
.blind-stack{display:grid;gap:1.6rem}
.blind-stack .obra img{max-height:230px;object-fit:cover}

/* Socio fundador */
.founder{display:grid;grid-template-columns:.9fr 1.1fr;gap:3rem;align-items:start}
.founder__cols{display:grid;gap:1.4rem}
.founder__foto{
  /* height:auto es imprescindible: sin él, el atributo height del <img> fija la
     altura y aspect-ratio queda anulado (la imagen sale estirada). */
  width:100%;max-width:340px;height:auto;aspect-ratio:1;object-fit:cover;object-position:center 22%;
  border-radius:var(--radio);margin-bottom:1.5rem;box-shadow:var(--sombra);
  border-bottom:5px solid var(--naranja);
}
.founder__role{color:var(--naranja-osc);font-weight:600;margin-top:-.4em}
.founder__id h2{margin-bottom:.25em}

/* Propuesta de valor */
.value{list-style:none;counter-reset:v;margin:0;padding:0;display:grid;gap:1.1rem}
.value li{
  counter-increment:v;position:relative;padding:1.5rem 1.8rem 1.5rem 5.2rem;
  background:var(--hueso);border-radius:var(--radio);border:1px solid transparent;transition:.25s ease;
}
.value li:hover{border-color:rgba(242,106,33,.35);background:#fff;box-shadow:var(--sombra)}
.value li::before{
  content:counter(v,decimal-leading-zero);
  position:absolute;left:1.6rem;top:1.35rem;
  font-family:var(--titulo);font-size:1.9rem;color:var(--naranja);line-height:1;
}
.value h3{margin-bottom:.3em}
.value p{margin:0}

/* Por qué elegirnos */
.why p{
  margin:0;padding:1.5rem 1.7rem;border-left:3px solid var(--naranja);
  background:rgba(255,255,255,.04);border-radius:0 var(--radio) var(--radio) 0;
}
.why--full{grid-column:1 / -1}

/* Contacto */
.section--contact{background:var(--hueso)}
.contact-list{list-style:none;margin:2rem 0 0;padding:0;display:grid;gap:1.1rem}
.contact-list li{display:flex;flex-direction:column;padding-bottom:1rem;border-bottom:1px solid var(--gris-claro)}
.contact-list span{font-size:.75rem;letter-spacing:.16em;text-transform:uppercase;color:var(--gris)}
.contact-list strong,.contact-list a{font-size:1.05rem;color:var(--tinta);font-weight:600}
.contact-list a:hover{color:var(--naranja-osc)}

.form{background:#fff;border:1px solid var(--gris-claro);border-radius:var(--radio);padding:2.2rem;box-shadow:var(--sombra);display:grid;gap:1.1rem}
.field{display:grid;gap:.4rem}
.field label{font-size:.82rem;font-weight:600;color:var(--tinta);letter-spacing:.02em}
.field input,.field select,.field textarea{
  font:inherit;font-size:.95rem;color:var(--tinta);
  padding:.8rem .95rem;border:1px solid var(--gris-claro);border-radius:10px;
  background:var(--hueso);transition:.2s ease;width:100%;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--naranja);background:#fff;box-shadow:0 0 0 3px rgba(242,106,33,.15);
}
.field textarea{resize:vertical}
.field--verificacion input{max-width:130px;font-size:1.05rem;font-weight:600;text-align:center}
.field.has-error input,.field.has-error textarea{border-color:#D93025;background:#FDF3F2}
.form__note{font-size:.8rem;color:var(--gris);margin:0;text-align:center}

.form__estado{margin:0;padding:.85rem 1rem;border-radius:10px;font-size:.9rem;font-weight:500}
.form__estado--ok{background:#E8F5EC;color:#1B6B36;border:1px solid #BFE3CB}
.form__estado--error{background:#FDF3F2;color:#A32A1E;border:1px solid #F3CFCB}
.form__estado--aviso{background:#FFF4EC;color:#9A4A15;border:1px solid #FAD9C2}

.btn:disabled{opacity:.65;cursor:progress;transform:none}

/* Honeypot antispam: fuera de pantalla en vez de display:none, porque varios
   bots ignoran los campos ocultos con display:none. */
.trampa{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}

/* ---------- Pie ---------- */
.footer{background:var(--tinta);color:rgba(255,255,255,.62);padding:3.5rem 0 1.5rem;font-size:.92rem}
.footer__inner{display:flex;flex-wrap:wrap;gap:2rem;justify-content:space-between;align-items:center}
.footer__brand{display:flex;align-items:center;gap:1rem}
.footer__brand img{width:58px;height:58px;border-radius:50%;object-fit:cover;background:#fff}
.footer__brand strong{color:#fff;font-family:var(--titulo);font-size:1.35rem;letter-spacing:.03em;text-transform:uppercase}
.footer__brand p{margin:.2em 0 0;font-size:.85rem}
.footer__links{display:flex;flex-wrap:wrap;gap:1.4rem}
.footer__links a{color:rgba(255,255,255,.7)}
.footer__links a:hover{color:var(--naranja)}
.footer__legal{margin-top:2.5rem;padding-top:1.3rem;border-top:1px solid rgba(255,255,255,.1);font-size:.8rem}
.footer__legal p{margin:0}

/* ---------- WhatsApp flotante ---------- */
.wa{
  position:fixed;right:20px;bottom:20px;z-index:90;
  width:56px;height:56px;border-radius:50%;display:grid;place-items:center;
  background:#25D366;box-shadow:0 10px 26px rgba(0,0,0,.28);transition:.25s ease;
}
.wa:hover{transform:scale(1.08)}
.wa svg{width:30px;height:30px;fill:#fff}

/* ---------- Animación de entrada ---------- */
/* El contenido es visible por defecto. La animación solo se aplica cuando el
   script de <head> confirma soporte, para que un fallo nunca oculte una sección. */
.js-anim .reveal{opacity:0;transform:translateY(26px);transition:opacity .6s ease,transform .6s ease}
.js-anim .reveal.is-visible{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .js-anim .reveal{opacity:1;transform:none;transition:none}
  *{animation:none!important}
}

/* ---------- Responsive ---------- */
@media (max-width:960px){
  .hero{padding:150px 0 80px}
  .hero__inner,.two-col,.founder{grid-template-columns:1fr}
  .hero__logo{order:-1}
  .hero__logo img{width:min(70%,280px)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .pillars{margin-top:-40px}
  .metodo-split{grid-template-columns:1fr}
  .metodo-split__foto{min-height:220px;max-height:280px}
  /* Tablet: 2 columnas. Con 4 piezas la grilla cierra exacta. */
  .galeria{grid-template-columns:repeat(2,1fr)}
  .gal,.gal--wide{grid-column:span 1}
  .gal img,.gal--wide img{height:250px}
  .equip__real{grid-template-columns:1fr;gap:1.2rem}
}

@media (max-width:760px){
  .nav__links{
    position:fixed;inset:76px 0 auto 0;flex-direction:column;align-items:stretch;
    gap:0;background:var(--tinta);padding:.5rem 1.25rem 1.5rem;
    transform:translateY(-130%);transition:transform .3s ease;
    box-shadow:0 20px 40px rgba(0,0,0,.35);
  }
  .nav__links.is-open{transform:translateY(0)}
  .nav__links a{padding:.95rem 0;border-bottom:1px solid rgba(255,255,255,.08)}
  .nav__links a.btn{margin-top:1rem;border-bottom:0;justify-content:center}
  .burger{display:flex}
  .brand small{display:none}
  .brand strong{font-size:1.15rem}
  .brand img{width:40px;height:40px}
  .hero{padding:130px 0 64px}
  .hero__logo img{width:min(52%,190px)}
  .hero__cta{margin:1.6rem 0 2rem}
  .hero__cta .btn{flex:1 1 auto;justify-content:center}
  .hero__stats{gap:1.2rem 2rem}
  .hero__stats strong{font-size:2rem}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .galeria{grid-template-columns:1fr}
  .gal,.gal--wide,.gal:last-child{grid-column:1 / -1}
  .gal img,.gal--wide img{height:215px}
  .section{padding:3.8rem 0}
  .hero__stats{gap:1.6rem}
  .form{padding:1.6rem}
  .footer__inner{flex-direction:column;align-items:flex-start}
}