/* ==========================================================
   COMERCIALIZADORA DAMINAGE — Hoja de estilos principal
   ========================================================== */

:root{
  --azul-marino:#0a1a33;
  --azul-profundo:#06101f;
  --azul-medio:#12315c;
  --azul-claro:#3b6fb5;
  --vino:#5c1638;
  --negro:#05080f;
  --blanco:#f4f7fb;
  --gris:#a8b6c9;
  --linea:rgba(255,255,255,.10);
  --sombra:0 24px 60px -24px rgba(0,0,0,.85);
  --radio:14px;
  --trans:.4s cubic-bezier(.22,.8,.3,1);
}

*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:86px;}
body{
  font-family:'Inter',system-ui,sans-serif;
  background:var(--negro);
  color:var(--blanco);
  line-height:1.7;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}

.contenedor{width:min(1180px,92%);margin:0 auto;}

h1,h2,h3,.etiqueta{font-family:'Barlow Condensed',sans-serif;letter-spacing:.02em;}
h1{font-size:clamp(2.2rem,5.4vw,4.2rem);line-height:1.05;text-transform:uppercase;}
h1 span{color:var(--azul-claro);}
h2{font-size:clamp(1.7rem,3.6vw,2.8rem);text-transform:uppercase;line-height:1.1;margin-bottom:1rem;}
h3{font-size:1.25rem;text-transform:uppercase;}
p{color:var(--gris);}
.lead{font-size:1.08rem;color:#c8d5e6;}
.centro{text-align:center;margin-inline:auto;max-width:820px;}

.etiqueta{
  display:inline-block;font-size:.85rem;letter-spacing:.28em;text-transform:uppercase;
  color:var(--azul-claro);margin-bottom:.6rem;
}
.sub{margin:1.6rem 0 .8rem;color:var(--blanco);font-size:1.1rem;letter-spacing:.1em;}

/* ============ PANTALLA DE CARGA ============ */
#preloader{
  position:fixed;inset:0;z-index:9999;display:grid;place-items:center;
  background:radial-gradient(circle at 50% 40%,var(--azul-marino),var(--negro) 70%);
  transition:opacity .8s ease,visibility .8s ease;
}
#preloader.oculto{opacity:0;visibility:hidden;}
.preloader-inner{position:relative;display:grid;place-items:center;gap:1.4rem;text-align:center;padding:1rem;}
.ring{
  position:absolute;top:-30px;width:230px;height:230px;border-radius:50%;
  border:2px solid rgba(59,111,181,.25);border-top-color:var(--azul-claro);
  border-right-color:var(--vino);animation:girar 1.4s linear infinite;
}
.preloader-logo{width:min(320px,72vw);animation:latir 2.2s ease-in-out infinite;filter:drop-shadow(0 10px 30px rgba(0,0,0,.6));}
.barra{width:min(280px,64vw);height:3px;background:rgba(255,255,255,.12);border-radius:99px;overflow:hidden;}
.barra span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--vino),var(--azul-claro));animation:cargar 2s ease forwards;}
.preloader-txt{font-family:'Barlow Condensed',sans-serif;letter-spacing:.35em;font-size:.8rem;color:var(--gris);}
@keyframes girar{to{transform:rotate(360deg);}}
@keyframes latir{0%,100%{transform:scale(1);}50%{transform:scale(1.05);}}
@keyframes cargar{to{width:100%;}}

/* ============ HEADER / MENU ============ */
#header{
  position:fixed;top:0;left:0;width:100%;z-index:900;
  background:rgba(5,8,15,.55);backdrop-filter:blur(14px);
  border-bottom:1px solid transparent;transition:var(--trans);
}
#header.solido{background:rgba(6,16,31,.95);border-bottom-color:var(--linea);}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.7rem 0;}
.marca img{height:42px;}
#nav ul{display:flex;flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:.2rem;list-style:none;}
#nav a{
  display:block;padding:.45rem .6rem;font-size:.78rem;letter-spacing:.06em;
  text-transform:uppercase;color:var(--gris);border-radius:8px;transition:var(--trans);
}
#nav a:hover{color:#fff;background:rgba(59,111,181,.18);}
#nav a.activo{color:#fff;box-shadow:inset 0 -2px 0 var(--azul-claro);}
#nav a.cta{background:linear-gradient(135deg,var(--vino),var(--azul-medio));color:#fff;padding:.5rem 1rem;}
#progreso{height:2px;width:0;background:linear-gradient(90deg,var(--vino),var(--azul-claro));transition:width .1s linear;}

.btn-menu{display:none;background:none;border:0;cursor:pointer;padding:.4rem;}
.btn-menu span{display:block;width:26px;height:2px;background:#fff;margin:5px 0;transition:var(--trans);}
.btn-menu.abierto span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.btn-menu.abierto span:nth-child(2){opacity:0;}
.btn-menu.abierto span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* ============ HERO ============ */
.hero{position:relative;min-height:100vh;display:grid;align-items:center;overflow:hidden;padding:7rem 0 4rem;}
.hero-fondo{
  position:absolute;inset:0;
  background:
    radial-gradient(circle at 15% 25%,rgba(92,22,56,.55),transparent 45%),
    radial-gradient(circle at 85% 70%,rgba(18,49,92,.75),transparent 50%),
    linear-gradient(160deg,var(--azul-marino),var(--negro));
  animation:mover 18s ease-in-out infinite alternate;
}
.hero-fondo::after{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(var(--linea) 1px,transparent 1px),linear-gradient(90deg,var(--linea) 1px,transparent 1px);
  background-size:70px 70px;mask-image:radial-gradient(circle at 50% 50%,#000,transparent 75%);
}
@keyframes mover{to{transform:scale(1.12) translateY(-2%);}}
.hero-inner{position:relative;text-align:center;display:grid;justify-items:center;gap:1.4rem;}
.hero-logo{width:min(420px,80vw);margin-bottom:.5rem;}
.hero .lead{max-width:760px;}
.hero-btns{display:flex;flex-wrap:wrap;gap:.8rem;justify-content:center;}
.btn{
  display:inline-block;padding:.85rem 1.8rem;border-radius:99px;font-size:.85rem;
  letter-spacing:.12em;text-transform:uppercase;transition:var(--trans);
}
.btn-primario{background:linear-gradient(135deg,var(--vino),var(--azul-medio));color:#fff;box-shadow:0 14px 34px -14px rgba(59,111,181,.9);}
.btn-primario:hover{transform:translateY(-3px);}
.btn-linea{border:1px solid rgba(255,255,255,.35);color:#fff;}
.btn-linea:hover{background:rgba(255,255,255,.1);transform:translateY(-3px);}
.hero-datos{list-style:none;display:flex;flex-wrap:wrap;justify-content:center;gap:1.6rem 2.6rem;margin-top:1.6rem;}
.hero-datos strong{display:block;font-family:'Barlow Condensed',sans-serif;font-size:2.3rem;color:#fff;line-height:1;}
.hero-datos span{font-size:.78rem;letter-spacing:.18em;text-transform:uppercase;color:var(--gris);}
.scroll-hint{
  position:absolute;bottom:26px;left:50%;translate:-50% 0;width:24px;height:40px;
  border:2px solid rgba(255,255,255,.4);border-radius:14px;
}
.scroll-hint::after{content:"";position:absolute;top:8px;left:50%;translate:-50% 0;width:4px;height:8px;background:#fff;border-radius:4px;animation:bajar 1.6s infinite;}
@keyframes bajar{0%{opacity:0;transform:translate(-50%,0);}40%{opacity:1;}100%{opacity:0;transform:translate(-50%,14px);}}

/* ============ SECCIONES ============ */
.seccion{padding:5.5rem 0;position:relative;}
.seccion.alt{background:linear-gradient(180deg,var(--azul-profundo),#040810);}
.dos-col{display:grid;grid-template-columns:1.05fr .95fr;gap:3rem;align-items:center;}
.dos-col.invertido > *:first-child{order:2;}
.titulo-centro{text-align:center;margin-bottom:2.6rem;}
.lista{list-style:none;display:grid;gap:.8rem;}
.lista li{position:relative;padding-left:1.6rem;color:var(--gris);}
.lista li::before{content:"";position:absolute;left:0;top:.7em;width:8px;height:8px;border-radius:2px;background:linear-gradient(135deg,var(--vino),var(--azul-claro));}

.marco{
  border-radius:var(--radio);overflow:hidden;border:1px solid var(--linea);
  box-shadow:var(--sombra);background:#000;
}
.marco img{width:100%;height:100%;object-fit:cover;transition:transform .8s var(--trans);}
.marco:hover img{transform:scale(1.06);}
.galeria-2{display:grid;gap:1rem;}

.grid-servicios{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.2rem;}
.tarjeta{
  padding:1.7rem;border-radius:var(--radio);border:1px solid var(--linea);
  background:linear-gradient(160deg,rgba(18,49,92,.42),rgba(5,8,15,.7));
  transition:var(--trans);position:relative;overflow:hidden;
}
.tarjeta::before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(92,22,56,.35),transparent 60%);opacity:0;transition:var(--trans);}
.tarjeta:hover{transform:translateY(-8px);border-color:rgba(59,111,181,.6);}
.tarjeta:hover::before{opacity:1;}
.tarjeta h3{margin-bottom:.5rem;position:relative;}
.tarjeta p{position:relative;font-size:.95rem;}
.grid-maquila{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.2rem;}
.tarjeta.img .marco{margin-bottom:1rem;aspect-ratio:16/10;}

.chips{display:flex;flex-wrap:wrap;gap:.5rem;}
.chips span{
  font-size:.74rem;letter-spacing:.05em;padding:.35rem .7rem;border-radius:99px;
  border:1px solid var(--linea);background:rgba(59,111,181,.12);color:#cfdcee;
}
.chips.grandes span{font-size:.9rem;padding:.5rem 1.2rem;text-transform:uppercase;}

.grid-razones{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.2rem;margin-top:1.6rem;}
.razon{display:flex;gap:1rem;padding:1.3rem;border-left:2px solid var(--azul-claro);background:rgba(255,255,255,.03);border-radius:0 var(--radio) var(--radio) 0;transition:var(--trans);}
.razon:hover{background:rgba(59,111,181,.14);transform:translateX(6px);}
.razon span{font-family:'Barlow Condensed',sans-serif;font-size:1.5rem;color:var(--azul-claro);}

/* ============ CONTACTO ============ */
.contacto{background:linear-gradient(160deg,var(--azul-marino),var(--negro));}
.datos-contacto{list-style:none;margin-top:1.2rem;display:grid;gap:.5rem;color:var(--gris);}
.datos-contacto strong{color:#fff;}
.link-contacto{color:var(--azul-claro);transition:var(--trans);border-bottom:1px solid transparent;}
.link-contacto:hover{color:#fff;border-bottom-color:var(--azul-claro);}
.btns-contacto{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:1.4rem;}
.formulario{display:grid;gap:.9rem;padding:1.8rem;border-radius:var(--radio);border:1px solid var(--linea);background:rgba(5,8,15,.6);box-shadow:var(--sombra);}
.formulario label{display:grid;gap:.4rem;font-size:.78rem;letter-spacing:.14em;text-transform:uppercase;color:var(--gris);}
.formulario input,.formulario select,.formulario textarea{
  font-family:inherit;font-size:.95rem;padding:.75rem .9rem;border-radius:10px;
  border:1px solid var(--linea);background:rgba(255,255,255,.05);color:#fff;
  text-transform:none;letter-spacing:normal;transition:var(--trans);
}
.formulario input:focus,.formulario select:focus,.formulario textarea:focus{outline:none;border-color:var(--azul-claro);background:rgba(59,111,181,.12);}
.formulario option{color:#000;}
.formulario button{border:0;cursor:pointer;font-family:inherit;justify-self:start;}
.aviso{font-size:.85rem;color:var(--azul-claro);min-height:1.2em;}

footer{background:#03060c;border-top:1px solid var(--linea);padding:2.2rem 0;}
.pie{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:1rem;}
.pie img{height:38px;}
.pie p{font-size:.82rem;}

#arriba{
  position:fixed;right:18px;bottom:18px;z-index:800;width:44px;height:44px;display:grid;place-items:center;
  border-radius:50%;background:linear-gradient(135deg,var(--vino),var(--azul-medio));color:#fff;
  opacity:0;pointer-events:none;transition:var(--trans);box-shadow:var(--sombra);
}
#arriba.visible{opacity:1;pointer-events:auto;}

/* ============ ANIMACION AL HACER SCROLL ============ */
.anim{opacity:0;transform:translateY(38px);transition:opacity .9s ease,transform .9s cubic-bezier(.22,.8,.3,1);}
.anim.visible{opacity:1;transform:none;}

/* ============ RESPONSIVO ============ */
@media (max-width:980px){
  .dos-col{grid-template-columns:1fr;}
  .dos-col.invertido > *:first-child{order:0;}
  .btn-menu{display:block;}
  #nav{
    position:fixed;inset:64px 0 auto 0;max-height:0;overflow:hidden;
    background:rgba(4,9,18,.98);backdrop-filter:blur(16px);
    border-bottom:1px solid var(--linea);transition:max-height .5s ease;
  }
  #nav.abierto{max-height:80vh;overflow-y:auto;}
  #nav ul{flex-direction:column;align-items:stretch;padding:1rem 6% 1.6rem;gap:.1rem;}
  #nav a{padding:.8rem .4rem;font-size:.9rem;border-bottom:1px solid rgba(255,255,255,.05);}
  #nav a.cta{text-align:center;margin-top:.8rem;border-radius:99px;}
}
@media (max-width:600px){
  .seccion{padding:3.6rem 0;}
  .hero-datos{gap:1.2rem 1.6rem;}
  .hero-datos strong{font-size:1.8rem;}
  .pie{justify-content:center;text-align:center;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .anim{opacity:1;transform:none;}
}