/* ==========================================================================
   CONSTRUCCIONES M&Q S.A.S. — Design System
   Paleta extraída del logo (dorado / acero / carbón) y de las fotos de obra.
   ========================================================================== */

:root{
  /* superficies */
  --ink:#0C1015;
  --surface:#12171F;
  --surface-2:#1A212C;
  --surface-3:#222B38;

  /* marca */
  --gold:#E9B62C;
  --gold-lt:#F8D66E;
  --gold-dk:#B98A18;
  --orange:#E2652C;     /* chalecos de seguridad */
  --steel:#9CA9B8;
  --steel-dk:#66717F;

  /* texto */
  --tx:#EAEEF3;
  --tx-soft:#A9B4C0;
  --tx-mute:#717D8B;

  --line:rgba(255,255,255,.09);
  --line-2:rgba(255,255,255,.16);

  /* tipografía */
  --f-disp:"Oswald",system-ui,sans-serif;
  --f-body:"Inter",system-ui,-apple-system,sans-serif;

  /* ritmo */
  --r:14px;
  --r-sm:8px;
  --wrap:1240px;
  --pad:clamp(1.25rem,5vw,4rem);
  --sect:clamp(4.5rem,9vw,8rem);

  --sh-1:0 2px 8px rgba(0,0,0,.28);
  --sh-2:0 14px 40px rgba(0,0,0,.42);
  --sh-3:0 30px 80px rgba(0,0,0,.55);
  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:clip}
body{
  margin:0;background:var(--ink);color:var(--tx);
  font-family:var(--f-body);font-size:16.5px;line-height:1.7;
  font-weight:400;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
body.is-locked{overflow:hidden}
img,video{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
::selection{background:var(--gold);color:#171717}

h1,h2,h3,h4,.disp{
  font-family:var(--f-disp);font-weight:600;line-height:1.05;
  letter-spacing:-.005em;text-transform:uppercase;margin:0;
}
h1{font-size:clamp(2.4rem,6.4vw,4.9rem);font-weight:700}
h2{font-size:clamp(1.95rem,4.4vw,3.3rem)}
h3{font-size:clamp(1.1rem,1.9vw,1.36rem);letter-spacing:.01em}
p{margin:0 0 1.05em}
p:last-child{margin-bottom:0}

.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--pad)}
section{position:relative}

/* ── utilidades de marca ───────────────────────────────────────────────── */
.hazard{
  height:6px;width:100%;
  background:repeating-linear-gradient(115deg,var(--gold) 0 16px,#141821 16px 32px);
}
.blueprint::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background:
    linear-gradient(var(--line) 1px,transparent 1px) 0 0/100% 62px,
    linear-gradient(90deg,var(--line) 1px,transparent 1px) 0 0/62px 100%;
  -webkit-mask-image:radial-gradient(ellipse 80% 65% at 50% 40%,#000 30%,transparent 78%);
  mask-image:radial-gradient(ellipse 80% 65% at 50% 40%,#000 30%,transparent 78%);
}
.eyebrow{
  display:inline-flex;align-items:center;gap:.6rem;
  font-family:var(--f-disp);font-size:.8rem;font-weight:500;
  letter-spacing:.24em;text-transform:uppercase;color:var(--gold);margin-bottom:1rem;
}
.eyebrow::before{content:"";width:30px;height:2px;background:var(--gold);flex:none}
.lede{color:var(--tx-soft);font-size:1.06rem;max-width:62ch}

.sect-head{margin-bottom:clamp(2.5rem,5vw,4rem);max-width:64ch}
.sect-head h2 span{color:var(--gold)}
.gold{color:var(--gold)}
.sect-head .lede{margin-top:1.1rem}

/* ── botones ───────────────────────────────────────────────────────────── */
.btn{
  --bg:var(--gold);--fg:#151109;
  position:relative;display:inline-flex;align-items:center;gap:.62rem;
  padding:.95rem 1.6rem;border-radius:var(--r-sm);
  background:var(--bg);color:var(--fg);
  font-family:var(--f-disp);font-weight:600;font-size:.94rem;
  letter-spacing:.09em;text-transform:uppercase;
  transition:transform .35s var(--ease),box-shadow .35s var(--ease),background .3s,color .3s,border-color .3s;
  box-shadow:0 6px 22px rgba(233,182,44,.24);overflow:hidden;
}
.btn svg{width:18px;height:18px;flex:none}
.btn::after{
  content:"";position:absolute;inset:0;transform:translateX(-101%);
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.42),transparent);
}
.btn:hover{transform:translateY(-3px);box-shadow:0 12px 32px rgba(233,182,44,.34)}
.btn:hover::after{animation:sheen .75s var(--ease)}
@keyframes sheen{to{transform:translateX(101%)}}
.btn--ghost{
  --bg:transparent;--fg:var(--tx);
  border:1.5px solid var(--line-2);box-shadow:none;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}
.btn--ghost:hover{--bg:rgba(255,255,255,.06);border-color:var(--gold);--fg:var(--gold);box-shadow:none}
.btn--sm{padding:.7rem 1.15rem;font-size:.83rem}

/* ══════════════════════════════════════════════════════════════════════
   PRECARGA
   ══════════════════════════════════════════════════════════════════════ */
#preload{
  position:fixed;inset:0;z-index:9999;display:grid;place-content:center;justify-items:center;
  gap:1.6rem;background:var(--ink);transition:opacity .6s var(--ease),visibility .6s;
}
#preload.done{opacity:0;visibility:hidden}
#preload::before{
  content:"";position:absolute;inset:0;opacity:.35;
  background:
    linear-gradient(var(--line) 1px,transparent 1px) 0 0/100% 54px,
    linear-gradient(90deg,var(--line) 1px,transparent 1px) 0 0/54px 100%;
  -webkit-mask-image:radial-gradient(circle at 50% 50%,#000,transparent 70%);
  mask-image:radial-gradient(circle at 50% 50%,#000,transparent 70%);
}
.pl-mark{position:relative;width:clamp(190px,34vw,290px)}
/* el logo se "construye" de abajo hacia arriba */
.pl-mark img{
  width:100%;filter:drop-shadow(0 10px 26px rgba(0,0,0,.6));
  clip-path:inset(100% 0 0 0);animation:build 1.5s .15s var(--ease-out) forwards;
}
@keyframes build{to{clip-path:inset(0 0 0 0)}}
.pl-mark::after{
  content:"";position:absolute;left:-4%;right:-4%;height:3px;background:var(--gold);
  box-shadow:0 0 20px 4px rgba(233,182,44,.6);animation:scanline 1.5s .15s var(--ease-out) forwards;
}
@keyframes scanline{0%{bottom:0;opacity:1}92%{opacity:1}100%{bottom:100%;opacity:0}}
.pl-bar{width:min(240px,52vw);height:3px;background:rgba(255,255,255,.1);border-radius:99px;overflow:hidden}
.pl-bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--gold-dk),var(--gold-lt));border-radius:99px}
.pl-pct{font-family:var(--f-disp);font-size:.74rem;letter-spacing:.22em;color:var(--tx-mute)}

/* barra de progreso de scroll */
#sbar{position:fixed;top:0;left:0;height:3px;width:0;z-index:900;
  background:linear-gradient(90deg,var(--gold-dk),var(--gold-lt));box-shadow:0 0 10px rgba(233,182,44,.5)}

/* ══════════════════════════════════════════════════════════════════════
   HEADER
   ══════════════════════════════════════════════════════════════════════ */
#hdr{
  position:fixed;top:0;left:0;right:0;z-index:800;
  transition:background .4s var(--ease),box-shadow .4s,border-color .4s,padding .4s var(--ease);
  border-bottom:1px solid transparent;padding:.55rem 0;
}
#hdr.stuck{background:rgba(12,16,21,.9);-webkit-backdrop-filter:blur(16px) saturate(1.3);
  backdrop-filter:blur(16px) saturate(1.3);border-bottom-color:var(--line);box-shadow:var(--sh-1)}
.hdr-in{display:flex;align-items:center;justify-content:space-between;gap:1.5rem}

/* el logo es un lockup cuadrado (símbolo + nombre): necesita altura para leerse */
.brand{display:flex;align-items:center;flex:none}
.brand img{height:66px;width:auto;transition:height .4s var(--ease)}
#hdr.stuck .brand img{height:52px}
@media(max-width:560px){
  .brand img{height:54px}
  #hdr.stuck .brand img{height:46px}
}
/* doble clase: gana a la media query anterior sin depender del orden */
.brand.brand--ft img{height:clamp(86px,15vw,110px);width:auto}

#nav ul{display:flex;align-items:center;gap:.35rem;list-style:none;margin:0;padding:0}
#nav a{
  position:relative;display:block;padding:.5rem .82rem;border-radius:var(--r-sm);
  font-family:var(--f-disp);font-size:.87rem;font-weight:500;letter-spacing:.1em;
  text-transform:uppercase;color:var(--tx-soft);transition:color .25s;
}
#nav a::after{
  content:"";position:absolute;left:.82rem;right:.82rem;bottom:.28rem;height:2px;
  background:var(--gold);transform:scaleX(0);transform-origin:left;transition:transform .35s var(--ease);
}
#nav a:hover,#nav a.on{color:#fff}
#nav a:hover::after,#nav a.on::after{transform:scaleX(1)}
.hdr-cta{display:flex;align-items:center;gap:.7rem;flex:none}

#burger{display:none;width:44px;height:44px;border-radius:var(--r-sm);border:1px solid var(--line-2);
  place-content:center}
#burger i{display:block;width:20px;height:2px;background:#fff;margin:4px auto;transition:.3s var(--ease)}
#burger.x i:nth-child(1){transform:translateY(6px) rotate(45deg)}
#burger.x i:nth-child(2){opacity:0}
#burger.x i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

@media(max-width:960px){
  #nav{position:fixed;inset:0 0 0 auto;width:min(340px,84vw);background:var(--surface);
    padding:6.5rem 1.6rem 2rem;transform:translateX(102%);transition:transform .45s var(--ease-out);
    box-shadow:var(--sh-3);border-left:1px solid var(--line);overflow-y:auto}
  #nav.open{transform:none}
  #nav ul{flex-direction:column;align-items:stretch;gap:.2rem}
  #nav a{padding:.95rem .5rem;font-size:1.05rem;border-bottom:1px solid var(--line)}
  #nav a::after{display:none}
  #burger{display:grid}
  .hdr-cta .btn{display:none}
}

/* ══════════════════════════════════════════════════════════════════════
   HERO
   ══════════════════════════════════════════════════════════════════════ */
.hero{min-height:100svh;display:grid;align-items:center;overflow:hidden;isolation:isolate}
.hero-media{position:absolute;inset:0;z-index:-2;overflow:hidden}
.hero-media video,.hero-media img{width:100%;height:100%;object-fit:cover;
  transform:scale(1.06);will-change:transform}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(100deg,rgba(10,13,18,.94) 0%,rgba(10,13,18,.78) 42%,rgba(10,13,18,.42) 100%),
    linear-gradient(to top,var(--ink) 2%,transparent 46%);
}
.hero-in{padding-block:9rem 7rem;max-width:60rem}
.hero h1{margin:.2rem 0 1.4rem;text-wrap:balance}
.hero h1 em{font-style:normal;color:var(--gold);position:relative;display:inline-block}
.hero h1 em::after{
  content:"";position:absolute;left:0;bottom:.06em;width:100%;height:.09em;
  background:var(--gold);opacity:.35;
}
.hero .lede{font-size:clamp(1rem,1.6vw,1.14rem);max-width:56ch}
.hero-btns{display:flex;flex-wrap:wrap;gap:.85rem;margin-top:2.1rem}

/* franja de confianza */
.hero-facts{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:1px;margin-top:3.4rem;background:var(--line);
  border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);max-width:44rem;
}
.hero-facts div{background:rgba(18,23,31,.62);padding:1.05rem 1.2rem}
.hero-facts b{display:block;font-family:var(--f-disp);font-size:1.5rem;color:var(--gold);line-height:1}
.hero-facts span{font-size:.79rem;color:var(--tx-mute);letter-spacing:.04em}

.scroll-cue{
  position:absolute;left:50%;bottom:1.6rem;translate:-50% 0;z-index:2;
  display:grid;place-items:center;gap:.5rem;
  font-family:var(--f-disp);font-size:.66rem;letter-spacing:.28em;color:var(--tx-mute);
}
.scroll-cue i{display:block;width:1px;height:42px;background:linear-gradient(var(--gold),transparent);
  animation:cue 1.9s infinite var(--ease)}
@keyframes cue{0%,100%{opacity:.25;transform:scaleY(.55)}50%{opacity:1;transform:scaleY(1)}}

/* ticker */
.ticker{border-block:1px solid var(--line);background:var(--surface);overflow:hidden;padding:.85rem 0;display:flex}
.ticker-run{display:flex;gap:2.6rem;padding-right:2.6rem;flex:none;
  animation:run 32s linear infinite;will-change:transform}
.ticker:hover .ticker-run{animation-play-state:paused}
@keyframes run{to{transform:translateX(-100%)}}
.ticker-run span{
  display:inline-flex;align-items:center;gap:.75rem;flex:none;
  font-family:var(--f-disp);font-size:.93rem;font-weight:500;letter-spacing:.16em;
  text-transform:uppercase;color:var(--tx-mute);white-space:nowrap;
}
.ticker-run span::before{content:"";width:7px;height:7px;background:var(--gold);
  transform:rotate(45deg);flex:none}

/* ══════════════════════════════════════════════════════════════════════
   SERVICIOS
   ══════════════════════════════════════════════════════════════════════ */
#servicios{padding-block:var(--sect);background:var(--ink)}
.svc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.15rem}
.svc{
  position:relative;padding:2rem 1.75rem 1.9rem;border-radius:var(--r);
  background:linear-gradient(165deg,var(--surface-2),var(--surface));
  border:1px solid var(--line);overflow:hidden;
  transition:transform .5s var(--ease),border-color .4s,box-shadow .5s var(--ease);
}
.svc::before{
  content:"";position:absolute;top:0;left:0;width:100%;height:3px;
  background:linear-gradient(90deg,var(--gold),var(--orange));
  transform:scaleX(0);transform-origin:left;transition:transform .5s var(--ease);
}
.svc::after{
  content:"";position:absolute;right:-30%;top:-40%;width:70%;aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle,rgba(233,182,44,.13),transparent 65%);
  opacity:0;transition:opacity .5s;
}
.svc:hover{transform:translateY(-7px);border-color:var(--line-2);box-shadow:var(--sh-2)}
.svc:hover::before{transform:scaleX(1)}
.svc:hover::after{opacity:1}
.svc-ico{
  position:relative;width:54px;height:54px;border-radius:12px;display:grid;place-items:center;
  background:rgba(233,182,44,.1);border:1px solid rgba(233,182,44,.25);
  margin-bottom:1.4rem;transition:background .4s,transform .5s var(--ease);
}
.svc-ico svg{width:27px;height:27px;stroke:var(--gold);fill:none;stroke-width:1.6;
  stroke-linecap:round;stroke-linejoin:round}
.svc:hover .svc-ico{background:rgba(233,182,44,.18);transform:rotate(-6deg) scale(1.06)}
.svc h3{margin-bottom:.65rem;position:relative}
.svc p{color:var(--tx-soft);font-size:.95rem;margin:0;position:relative}
.svc-n{
  position:absolute;right:1.3rem;top:1.1rem;font-family:var(--f-disp);font-size:2.4rem;
  font-weight:700;color:rgba(255,255,255,.045);line-height:1;
}

/* ══════════════════════════════════════════════════════════════════════
   EMPRESA
   ══════════════════════════════════════════════════════════════════════ */
#empresa{padding-block:var(--sect);background:var(--surface);overflow:hidden}
.emp{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(2.2rem,5vw,4.6rem);align-items:center}
@media(max-width:900px){.emp{grid-template-columns:1fr}}
.emp-tx p{color:var(--tx-soft)}
.emp-list{list-style:none;padding:0;margin:1.6rem 0 0;display:grid;gap:.72rem}
.emp-list li{display:flex;gap:.8rem;align-items:flex-start;font-size:.96rem;color:var(--tx-soft)}
.emp-list svg{width:20px;height:20px;flex:none;margin-top:.22rem;stroke:var(--gold);fill:none;stroke-width:2}

.emp-fig{position:relative;isolation:isolate}
.emp-fig img{width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:var(--r);box-shadow:var(--sh-3)}
.emp-fig::before{
  content:"";position:absolute;right:-14px;bottom:-14px;width:58%;height:58%;
  border:2px solid var(--gold);border-radius:var(--r);opacity:.5;z-index:-1;
}
.emp-badge{
  position:absolute;left:-10px;bottom:24px;padding:1rem 1.3rem;border-radius:var(--r-sm);
  background:var(--gold);color:#171208;box-shadow:var(--sh-2);
}
.emp-badge b{display:block;font-family:var(--f-disp);font-size:1.9rem;line-height:1}
.emp-badge span{font-size:.73rem;font-weight:600;letter-spacing:.1em;text-transform:uppercase;opacity:.75}

.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(128px,1fr));gap:1px;
  margin-top:2.6rem;background:var(--line);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.stat{background:var(--surface-2);padding:1.3rem 1.1rem;text-align:center}
.stat b{display:block;font-family:var(--f-disp);font-size:clamp(1.8rem,3.4vw,2.5rem);
  color:var(--gold);line-height:1}
.stat span{font-size:.76rem;color:var(--tx-mute);letter-spacing:.05em}

/* ══════════════════════════════════════════════════════════════════════
   PROCESO
   ══════════════════════════════════════════════════════════════════════ */
#proceso{padding-block:var(--sect);background:var(--ink);overflow:hidden}
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(215px,1fr));gap:1.6rem;position:relative}
.step{position:relative;padding-top:2.9rem}
.step::before{
  content:"";position:absolute;top:19px;left:0;width:100%;height:2px;
  background:repeating-linear-gradient(90deg,var(--line-2) 0 7px,transparent 7px 14px);
}
.step:last-child::before{background:none}
.step b{
  position:absolute;top:0;left:0;width:40px;height:40px;border-radius:50%;
  display:grid;place-items:center;background:var(--surface-2);border:2px solid var(--gold);
  font-family:var(--f-disp);font-size:1rem;color:var(--gold);
}
.step h3{font-size:1.06rem;margin-bottom:.5rem}
.step p{font-size:.92rem;color:var(--tx-mute);margin:0}

/* ══════════════════════════════════════════════════════════════════════
   PROYECTOS — cuadrícula por categoría
   ══════════════════════════════════════════════════════════════════════ */
#proyectos{padding-block:var(--sect);background:var(--surface);overflow:hidden}

.proj-bar{
  display:flex;align-items:center;justify-content:space-between;gap:1.4rem;flex-wrap:wrap;
  padding-bottom:1.5rem;margin-bottom:2rem;border-bottom:1px solid var(--line);
}
.proj-count{
  font-family:var(--f-disp);font-size:.8rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--tx-mute);flex:none;
}

.filters{display:flex;flex-wrap:wrap;gap:.5rem}
.filters button{
  display:inline-flex;align-items:center;gap:.45rem;white-space:nowrap;
  padding:.55rem 1rem;border-radius:99px;border:1px solid var(--line-2);
  font-family:var(--f-disp);font-size:.81rem;font-weight:500;letter-spacing:.07em;
  text-transform:uppercase;color:var(--tx-soft);transition:.3s var(--ease);
}
.filters button:hover{border-color:var(--gold);color:var(--gold)}
.filters button.on{background:var(--gold);border-color:var(--gold);color:#171208}
.filters button i{
  font-style:normal;font-size:.72em;padding:.1em .45em;border-radius:99px;
  background:rgba(255,255,255,.09);opacity:.85;
}
.filters button.on i{background:rgba(0,0,0,.16)}

.proj-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:1.1rem}
.proj{
  position:relative;margin:0;border-radius:var(--r);overflow:hidden;cursor:zoom-in;
  background:var(--surface-3);border:1px solid var(--line);aspect-ratio:4/3;
  opacity:0;transform:translateY(24px) scale(.98);
  transition:opacity .6s var(--ease-out) var(--d,0ms),transform .6s var(--ease-out) var(--d,0ms),
             border-color .35s,box-shadow .45s var(--ease);
}
.proj.in{opacity:1;transform:none}
.proj:hover{border-color:var(--line-2);box-shadow:var(--sh-2)}
.proj img{width:100%;height:100%;object-fit:cover;transition:transform 1s var(--ease-out)}
.proj:hover img{transform:scale(1.06)}
.proj::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(to top,rgba(8,11,15,.9) 0%,rgba(8,11,15,.15) 42%,transparent 68%);
  opacity:.85;transition:opacity .4s;
}
.proj:hover::after{opacity:1}

.proj-tag{
  position:absolute;top:.85rem;left:.85rem;z-index:2;
  padding:.34rem .7rem;border-radius:99px;
  background:rgba(12,16,21,.72);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  border:1px solid rgba(233,182,44,.4);
  font-family:var(--f-disp);font-size:.66rem;font-weight:500;letter-spacing:.14em;
  text-transform:uppercase;color:var(--gold);
  opacity:0;transform:translateY(-6px);transition:.4s var(--ease);
}
.proj:hover .proj-tag{opacity:1;transform:none}

.proj figcaption{
  position:absolute;inset:auto 0 0 0;z-index:2;padding:1.15rem 1.2rem;
  display:flex;align-items:flex-end;justify-content:space-between;gap:.9rem;
}
.proj figcaption b{
  font-family:var(--f-disp);font-size:.92rem;font-weight:500;letter-spacing:.06em;
  text-transform:uppercase;line-height:1.25;color:#fff;
}
.proj-zoom{
  flex:none;width:36px;height:36px;border-radius:50%;display:grid;place-items:center;
  background:var(--gold);opacity:0;transform:scale(.6);transition:.4s var(--ease);
}
.proj-zoom svg{width:17px;height:17px;stroke:#171208;fill:none;stroke-width:2;stroke-linecap:round}
.proj:hover .proj-zoom{opacity:1;transform:none}

@media(max-width:640px){
  .proj-grid{grid-template-columns:1fr;gap:.9rem}
  .proj{aspect-ratio:3/2}
  .proj-tag,.proj-zoom{opacity:1;transform:none}
}


/* lightbox */
#lb{
  position:fixed;inset:0;z-index:950;display:grid;place-items:center;padding:clamp(1rem,4vw,3rem);
  background:rgba(6,8,11,.95);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  opacity:0;visibility:hidden;transition:opacity .4s var(--ease),visibility .4s;
}
#lb.open{opacity:1;visibility:visible}
#lb img{max-width:100%;max-height:80vh;border-radius:var(--r-sm);box-shadow:var(--sh-3);
  transform:scale(.94);transition:transform .5s var(--ease-out)}
#lb.open img{transform:none}
#lb .lb-cap{margin-top:1rem;text-align:center;font-family:var(--f-disp);
  letter-spacing:.16em;text-transform:uppercase;font-size:.85rem;color:var(--tx-soft)}
.lb-btn{position:absolute;width:52px;height:52px;border-radius:50%;display:grid;place-items:center;
  background:rgba(255,255,255,.07);border:1px solid var(--line-2);transition:.3s}
.lb-btn:hover{background:var(--gold)}
.lb-btn svg{width:20px;height:20px;stroke:#fff;fill:none;stroke-width:2;stroke-linecap:round}
.lb-btn:hover svg{stroke:#171208}
#lbX{top:clamp(1rem,3vw,2rem);right:clamp(1rem,3vw,2rem)}
#lbP{left:clamp(.6rem,2vw,2rem);top:50%;translate:0 -50%}
#lbN{right:clamp(.6rem,2vw,2rem);top:50%;translate:0 -50%}

/* ══════════════════════════════════════════════════════════════════════
   CONTACTO
   ══════════════════════════════════════════════════════════════════════ */
#contacto{padding-block:var(--sect);background:var(--ink);overflow:hidden}
.ct{display:grid;grid-template-columns:.95fr 1.05fr;gap:clamp(2rem,4.5vw,4rem)}
@media(max-width:900px){.ct{grid-template-columns:1fr}}
.ct-cards{display:grid;gap:.8rem;margin-top:2rem}
.ct-card{
  display:flex;align-items:center;gap:1.1rem;padding:1.15rem 1.3rem;border-radius:var(--r);
  background:var(--surface-2);border:1px solid var(--line);
  transition:transform .4s var(--ease),border-color .35s,background .35s;
}
.ct-card:hover{transform:translateX(7px);border-color:var(--gold);background:var(--surface-3)}
.ct-card .ic{width:46px;height:46px;border-radius:11px;display:grid;place-items:center;flex:none;
  background:rgba(233,182,44,.11);border:1px solid rgba(233,182,44,.24)}
.ct-card .ic svg{width:22px;height:22px;stroke:var(--gold);fill:none;stroke-width:1.8;
  stroke-linecap:round;stroke-linejoin:round}
.ct-card b{display:block;font-family:var(--f-disp);font-size:.75rem;letter-spacing:.2em;
  text-transform:uppercase;color:var(--tx-mute);font-weight:500}
.ct-card span{font-size:1.02rem;color:var(--tx)}

form{padding:clamp(1.5rem,3vw,2.2rem);border-radius:var(--r);
  background:linear-gradient(165deg,var(--surface-2),var(--surface));border:1px solid var(--line)}
.field{margin-bottom:1rem}
.field label{display:block;font-family:var(--f-disp);font-size:.74rem;letter-spacing:.18em;
  text-transform:uppercase;color:var(--tx-mute);margin-bottom:.45rem}
.field input,.field select,.field textarea{
  width:100%;padding:.85rem 1rem;border-radius:var(--r-sm);background:var(--ink);
  border:1px solid var(--line-2);color:var(--tx);font:inherit;font-size:.97rem;
  transition:border-color .3s,box-shadow .3s;
}
.field textarea{resize:vertical;min-height:112px}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--gold);box-shadow:0 0 0 3px rgba(233,182,44,.14)}
.field select{appearance:none;-webkit-appearance:none;cursor:pointer;
  background-image:linear-gradient(45deg,transparent 50%,var(--steel) 50%),linear-gradient(135deg,var(--steel) 50%,transparent 50%);
  background-position:calc(100% - 20px) 50%,calc(100% - 14px) 50%;
  background-size:6px 6px,6px 6px;background-repeat:no-repeat}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
@media(max-width:520px){.f-row{grid-template-columns:1fr}}
form .btn{width:100%;justify-content:center;margin-top:.4rem}
.f-note{font-size:.79rem;color:var(--tx-mute);text-align:center;margin:.9rem 0 0}

/* ══════════════════════════════════════════════════════════════════════
   FOOTER + FAB
   ══════════════════════════════════════════════════════════════════════ */
footer{background:var(--surface);border-top:1px solid var(--line);padding-block:3.2rem 0}
.ft-top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:2.4rem;padding-bottom:2.6rem}
@media(max-width:760px){.ft-top{grid-template-columns:1fr;gap:1.8rem}}
.ft-top p{color:var(--tx-mute);font-size:.93rem;max-width:36ch;margin-top:1rem}
.ft-h{font-family:var(--f-disp);font-size:.79rem;letter-spacing:.2em;text-transform:uppercase;
  color:var(--gold);margin-bottom:1rem}
.ft-top ul{list-style:none;margin:0;padding:0;display:grid;gap:.55rem}
.ft-top ul a,.ft-top ul li{color:var(--tx-mute);font-size:.93rem;transition:color .25s}
.ft-top ul a:hover{color:var(--gold)}
.ft-bot{border-top:1px solid var(--line);padding-block:1.3rem;display:flex;
  justify-content:space-between;gap:1rem;flex-wrap:wrap;font-size:.82rem;color:var(--tx-mute)}

.fab{
  position:fixed;right:clamp(1rem,3vw,1.8rem);bottom:clamp(1rem,3vw,1.8rem);z-index:700;
  width:58px;height:58px;border-radius:50%;display:grid;place-items:center;
  background:#25D366;box-shadow:0 10px 30px rgba(37,211,102,.4);
  transition:transform .4s var(--ease);
}
.fab svg{width:30px;height:30px;fill:#fff;position:relative;z-index:1}
.fab::after{content:"";position:absolute;inset:0;border-radius:50%;border:2px solid #25D366;
  animation:pulse 2.4s infinite var(--ease)}
@keyframes pulse{0%{transform:scale(1);opacity:.8}100%{transform:scale(1.7);opacity:0}}
.fab:hover{transform:scale(1.09)}

/* ══════════════════════════════════════════════════════════════════════
   REVEALS AL SCROLL (izquierda / derecha / arriba)
   ══════════════════════════════════════════════════════════════════════ */
.rv{opacity:0;transition:opacity .85s var(--ease-out),transform .85s var(--ease-out);will-change:transform,opacity}
.rv-l{transform:translateX(-58px)}
.rv-r{transform:translateX(58px)}
.rv-u{transform:translateY(46px)}
.rv-s{transform:scale(.93)}
.rv.in{opacity:1;transform:none}

@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;
    transition-duration:.01ms !important;scroll-behavior:auto !important}
  .rv{opacity:1;transform:none}
}

/* ══════════════════════════════════════════════════════════════════════
   VARIANTE CLARA — se activa con <html data-theme="light">
   No afecta a la versión oscura: todo cuelga del atributo.
   ══════════════════════════════════════════════════════════════════════ */
:root[data-theme="light"]{
  --ink:#FFFFFF;
  --surface:#F4F6F9;
  --surface-2:#FFFFFF;
  --surface-3:#E9EEF3;

  --tx:#141A22;
  --tx-soft:#4B5663;
  --tx-mute:#6E7885;
  --steel:#6E7885;
  --steel-dk:#8A94A1;

  --line:rgba(18,24,32,.11);
  --line-2:rgba(18,24,32,.20);

  /* dorado oscurecido: el de marca no contrasta como texto sobre blanco */
  --gold-tx:#8F6408;

  --sh-1:0 1px 3px rgba(20,30,45,.09);
  --sh-2:0 10px 30px rgba(20,30,45,.11);
  --sh-3:0 24px 60px rgba(20,30,45,.15);
}

/* ── dorado como texto ── */
[data-theme="light"] .eyebrow,
[data-theme="light"] .sect-head h2 span,
[data-theme="light"] .gold,
[data-theme="light"] .hero h1 em,
[data-theme="light"] .hero-facts b,
[data-theme="light"] .stat b,
[data-theme="light"] .step b,
[data-theme="light"] .ft-h,
[data-theme="light"] .filters button:hover,
[data-theme="light"] .ft-top ul a:hover{color:var(--gold-tx)}
[data-theme="light"] .svc-ico svg,
[data-theme="light"] .emp-list svg,
[data-theme="light"] .ct-card .ic svg{stroke:var(--gold-tx)}

/* ── header ── */
[data-theme="light"] #hdr.stuck{background:rgba(255,255,255,.92)}
[data-theme="light"] #burger i{background:var(--tx)}
[data-theme="light"] #nav a:hover,[data-theme="light"] #nav a.on{color:var(--tx)}
@media(max-width:960px){[data-theme="light"] #nav{background:#fff}}

/* ── hero: velo blanco sobre el video ── */
/* velo suave: deja ver el video y la legibilidad la sostiene el halo del texto */
[data-theme="light"] .hero-media::after{
  background:
    linear-gradient(100deg,rgba(255,255,255,.88) 0%,rgba(255,255,255,.66) 48%,rgba(255,255,255,.26) 100%),
    linear-gradient(to top,#fff 1%,transparent 38%);
}
[data-theme="light"] .hero .eyebrow,
[data-theme="light"] .hero h1,
[data-theme="light"] .hero .lede{text-shadow:0 1px 16px rgba(255,255,255,.92),0 1px 3px rgba(255,255,255,.9)}
[data-theme="light"] .hero h1 em::after{opacity:.28}
[data-theme="light"] .hero-facts div{background:rgba(255,255,255,.88)}
[data-theme="light"] .scroll-cue{color:var(--tx-soft);text-shadow:0 1px 10px rgba(255,255,255,.9)}
[data-theme="light"] .btn--ghost:hover{--bg:rgba(18,24,32,.05)}

/* ── secciones ── */
[data-theme="light"] .svc{background:linear-gradient(165deg,#FFFFFF,#F7F9FB)}
[data-theme="light"] .svc-n{color:rgba(18,24,32,.07)}
[data-theme="light"] .svc-ico{background:rgba(233,182,44,.16);border-color:rgba(233,182,44,.5)}
[data-theme="light"] .hazard{background:repeating-linear-gradient(115deg,var(--gold) 0 16px,#E4E8ED 16px 32px)}
[data-theme="light"] .step b{background:#fff}

/* ── proyectos: las tarjetas conservan el velo oscuro sobre la foto ── */
[data-theme="light"] .filters button i{background:rgba(18,24,32,.08)}
[data-theme="light"] .filters button.on i{background:rgba(0,0,0,.15)}

/* ── lightbox ── */
[data-theme="light"] #lb{background:rgba(255,255,255,.97)}
[data-theme="light"] .lb-btn{background:rgba(18,24,32,.06)}
[data-theme="light"] .lb-btn svg{stroke:var(--tx)}

/* ── formulario ── */
[data-theme="light"] form{background:linear-gradient(165deg,#FFFFFF,#F7F9FB)}
[data-theme="light"] .field input,
[data-theme="light"] .field select,
[data-theme="light"] .field textarea{background:#fff}
[data-theme="light"] .ct-card{background:#fff}
[data-theme="light"] .ct-card:hover{background:#FBFCFD}

/* ── logo sobre placa oscura ──
   El logo es plateado y dorado sobre fondo oscuro: sobre blanco se apaga.
   La placa le devuelve el contraste para el que fue diseñado. */
[data-theme="light"] .brand{
  background:linear-gradient(158deg,#1D2532 0%,#0E131A 100%);
  border:1px solid rgba(233,182,44,.3);
  border-radius:13px;padding:.45rem .85rem;
  box-shadow:0 6px 20px rgba(18,26,40,.2);
  transition:box-shadow .4s var(--ease),padding .4s var(--ease);
}
[data-theme="light"] .brand:hover{box-shadow:0 10px 26px rgba(18,26,40,.28)}
[data-theme="light"] #hdr.stuck .brand{padding:.38rem .7rem}
/* en el footer .brand es hijo de un grid: sin esto la placa ocupa toda la columna */
[data-theme="light"] .brand.brand--ft{
  display:inline-flex;width:-moz-fit-content;width:fit-content;
  border-radius:16px;padding:.85rem 1.1rem;
}

/* ── precarga ── */
[data-theme="light"] .pl-mark{
  background:linear-gradient(158deg,#1D2532 0%,#0E131A 100%);
  border:1px solid rgba(233,182,44,.3);
  border-radius:20px;padding:1.5rem 1.7rem;
  box-shadow:0 20px 50px rgba(18,26,40,.24);
}
[data-theme="light"] .pl-mark img{filter:none}
[data-theme="light"] .pl-bar{background:rgba(18,24,32,.1)}