/* ===== AGTQBERTEK — estilos ===== */
:root{
  --bg:#eaf4ff; --ink:#102a43; --dark:#0b3d91; --dark2:#1558a7;
  --brand:#ff6347; --brand2:#ff6347; --muted:#64748b; --white:#fff;
  --r:18px; --shadow:0 20px 50px rgba(0,0,0,.18);
  --font:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{font-family:var(--font);background:var(--bg);color:var(--ink);line-height:1.65;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit}
.container{width:min(1140px,92%);margin-inline:auto}
.narrow{width:min(780px,92%)}
.center{text-align:center;margin-bottom:2.5rem}
.muted{color:var(--muted)}
.skip{position:absolute;left:-999px;top:0;background:var(--brand);color:#fff;padding:.6rem 1rem;z-index:999}
.skip:focus{left:0}
:focus-visible{outline:3px solid var(--brand2);outline-offset:3px}

/* Header */
.header{position:fixed;inset:0 0 auto 0;z-index:50;transition:background .3s,box-shadow .3s}
.header.scrolled{background:rgba(11,61,145,.94);backdrop-filter:blur(10px);box-shadow:0 4px 20px rgba(11,61,145,.35)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;text-decoration:none}
.logo img{width:auto;height:52px;object-fit:contain;border-radius:6px}
.menu{display:flex;align-items:center;gap:1.6rem}
.menu a{color:#e9e9ec;text-decoration:none;font-size:.95rem;position:relative}
.menu a:not(.btn)::after{content:"";position:absolute;left:0;bottom:-4px;width:0;height:2px;background:var(--brand2);transition:width .25s}
.menu a:not(.btn):hover::after{width:100%}
.burger{display:none;background:none;border:0;width:44px;height:44px;cursor:pointer;flex-direction:column;justify-content:center;gap:6px;align-items:center}
.burger span{display:block;width:26px;height:2px;background:#fff;transition:transform .3s,opacity .3s}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(8px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-8px) rotate(-45deg)}

/* Botones */
.btn{display:inline-block;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;border:0;padding:.9rem 1.7rem;border-radius:999px;font:600 1rem var(--font);text-decoration:none;cursor:pointer;box-shadow:0 10px 25px rgba(255,99,71,.4);transition:transform .2s,box-shadow .2s}
.btn:hover{transform:translateY(-3px);box-shadow:0 16px 30px rgba(255,99,71,.5)}
.btn-sm{padding:.55rem 1.2rem;font-size:.9rem}
.btn-ghost{background:transparent;box-shadow:none;border:2px solid rgba(255,255,255,.4)}
.btn-ghost:hover{background:rgba(255,255,255,.1);box-shadow:none}

/* Hero 3D */
.hero{position:relative;min-height:100vh;background:radial-gradient(1200px 600px at 75% 40%,#2478d4 0,var(--dark) 60%);color:#fff;display:flex;align-items:center;overflow:hidden;padding:110px 0 70px}
.hero-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:2rem;align-items:center}
.eyebrow{color:var(--brand);font-weight:700;text-transform:uppercase;letter-spacing:.18em;font-size:.8rem;margin-bottom:.8rem}
.hero .eyebrow{color:var(--brand2)}
h1{font-size:clamp(2.2rem,5.4vw,4rem);line-height:1.08;margin-bottom:1.2rem}
h2{font-size:clamp(1.8rem,3.8vw,2.7rem);line-height:1.15;margin-bottom:1rem}
h3{font-size:1.2rem;margin-bottom:.4rem}
.grad{background:linear-gradient(135deg,var(--brand2),#ff6347);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:1.15rem;color:#cfd2d8;max-width:34rem;margin-bottom:2rem}
.cta-row{display:flex;flex-wrap:wrap;gap:1rem}

.scene{position:relative;height:460px;perspective:1100px;display:grid;place-items:center}
.sun{position:absolute;width:300px;height:300px;border-radius:50%;background:radial-gradient(circle,rgba(255,138,61,.55),transparent 70%);filter:blur(10px);animation:pulse 5s ease-in-out infinite}
.roof{--rx:58deg;--rz:-32deg;position:relative;display:grid;grid-template-columns:repeat(9,1fr);gap:4px;width:min(440px,90%);transform-style:preserve-3d;transform:rotateX(var(--rx)) rotateZ(var(--rz));transition:transform .25s ease-out;filter:drop-shadow(0 60px 40px rgba(0,0,0,.55))}
/* Teja termoacústica blanca: paneles con costillas (crestas) */
.tile{aspect-ratio:1/1.25;border-radius:4px 4px 10px 10px;background:
  repeating-linear-gradient(90deg,#f4f6f8 0 6%,#ffffff 6% 9%,#c9d0d8 9% 12%,#e3e8ed 12% 25%);
  box-shadow:inset 0 4px 0 rgba(255,255,255,.9),inset 0 -14px 16px rgba(60,70,85,.28),0 8px 0 #aab3be;transform:translateZ(0);animation:rise .8s both}
/* Cresta alta: costillas más marcadas y sombra más profunda */
.tile.alt{background:
  repeating-linear-gradient(90deg,#eef1f4 0 5%,#ffffff 5% 8%,#9aa5b2 8% 12%,#d9dfe6 12% 33.33%);
  box-shadow:inset 0 4px 0 rgba(255,255,255,.9),inset 0 -18px 20px rgba(40,50,65,.38),0 10px 0 #8d98a6}
@keyframes rise{from{opacity:0;transform:translateZ(120px)}to{opacity:1;transform:translateZ(0)}}
@keyframes pulse{50%{transform:scale(1.15);opacity:.8}}
.scroll-hint{position:absolute;bottom:22px;left:50%;translate:-50% 0;width:26px;height:42px;border:2px solid rgba(255,255,255,.5);border-radius:14px}
.scroll-hint span{position:absolute;left:50%;top:8px;width:4px;height:8px;margin-left:-2px;border-radius:2px;background:#fff;animation:wheel 1.6s infinite}
@keyframes wheel{to{transform:translateY(14px);opacity:0}}

/* Secciones */
.section{padding:96px 0}
.section.dark{background:var(--dark);color:#fff}
.section.dark .eyebrow{color:var(--brand2)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:3rem;align-items:center}
.two p{margin-bottom:1rem}
.checks{list-style:none;display:grid;gap:.6rem;margin-top:1.2rem}
.checks li{padding-left:2rem;position:relative;font-weight:500}
.checks li::before{content:"";position:absolute;left:0;top:.35em;width:1.2rem;height:1.2rem;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand2))}
.checks li::after{content:"";position:absolute;left:.43rem;top:.5em;width:.35rem;height:.65rem;border:solid #fff;border-width:0 2px 2px 0;rotate:45deg;translate:0 -1px}

/* Foto con placeholder */
.photo,.g-item{position:relative;display:block;border-radius:var(--r);overflow:hidden;background:linear-gradient(135deg,#1558a7,#ff6347);aspect-ratio:4/3;box-shadow:var(--shadow)}
.photo img,.g-item img{width:100%;height:100%;object-fit:cover}
.ph-label{position:absolute;inset:0;display:none;place-items:center;text-align:center;padding:1rem;color:#ffd9bf;font-size:.85rem}
.is-missing + .ph-label{display:grid}
img.is-missing{visibility:hidden}

/* Tarjetas 3D */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1.4rem;perspective:1000px}
.card{background:var(--dark2);border:1px solid rgba(255,255,255,.08);border-radius:var(--r);padding:1.8rem;box-shadow:var(--shadow);transition:box-shadow .3s}
.card:hover{box-shadow:0 25px 60px rgba(255,99,71,.25)}
.card p{color:#b9bcc4;font-size:.96rem}
.ico{width:54px;height:54px;border-radius:14px;display:grid;place-items:center;margin-bottom:1rem;background:linear-gradient(135deg,var(--brand),var(--brand2))}
.ico svg{width:26px;height:26px;fill:none;stroke:#fff;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
[data-tilt]{transform-style:preserve-3d;will-change:transform}

/* Perfiles de teja */
.profiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.6rem;perspective:1000px}
.profile{padding:2rem}
.wave{width:100%;height:64px;margin-bottom:1.2rem}
.wave path{fill:none;stroke:#fff;stroke-width:3;stroke-linejoin:round;stroke-linecap:round}
.profile ul{list-style:none;margin-top:1rem;display:grid;gap:.45rem;font-size:.92rem;color:#dfe2e8}
.profile li{padding-left:1.3rem;position:relative}
.profile li::before{content:"";position:absolute;left:0;top:.6em;width:.55rem;height:.55rem;border-radius:50%;background:var(--brand2)}
/* Tarjetas sobre fondo claro */
.cards.light .card{background:#fff;border-color:rgba(0,0,0,.06);box-shadow:0 12px 30px rgba(0,0,0,.08)}
.cards.light .card p{color:var(--muted)}
.tag{position:absolute;left:12px;bottom:12px;background:rgba(20,22,26,.8);color:#fff;font-size:.78rem;padding:.25rem .7rem;border-radius:999px;backdrop-filter:blur(4px)}

/* Proceso (sin uso actual; se conserva por si se reactiva) */
.steps{list-style:none;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1.4rem}
.steps li{background:#fff;border-radius:var(--r);padding:1.8rem;box-shadow:0 12px 30px rgba(0,0,0,.08);position:relative}
.steps span{display:grid;place-items:center;width:44px;height:44px;border-radius:50%;background:var(--dark);color:var(--brand2);font-weight:700;margin-bottom:.8rem}
.steps p{color:var(--muted);font-size:.95rem}

/* Galería */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem}
.g-item{border:0;cursor:zoom-in;padding:0;transition:transform .35s,box-shadow .35s}
.g-item img{transition:transform .6s}
.g-item:hover{transform:translateY(-6px) scale(1.01)}
.g-item:hover img{transform:scale(1.08)}
.lightbox{position:fixed;inset:0;z-index:100;background:rgba(0,0,0,.9);display:grid;place-items:center;padding:1rem}
.lightbox[hidden]{display:none}
.lightbox img{max-height:88vh;max-width:96vw;border-radius:12px}
.lb-close{position:absolute;top:14px;right:18px;background:none;border:0;color:#fff;font-size:2.6rem;cursor:pointer;line-height:1}

/* FAQ */
.faq details{background:#fff;border-radius:14px;margin-bottom:.8rem;padding:1.1rem 1.4rem;box-shadow:0 8px 22px rgba(0,0,0,.06)}
.faq summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:1rem}
.faq summary::after{content:"+";color:var(--brand);font-size:1.4rem;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{margin-top:.7rem;color:var(--muted)}

/* Contacto */
.contact-list{list-style:none;display:grid;gap:.5rem;margin-top:1rem}
.contact-list a{color:var(--brand2)}
.form{background:var(--dark2);border-radius:var(--r);padding:2rem;box-shadow:var(--shadow);display:grid;gap:.4rem}
.form label{font-weight:600;font-size:.9rem;margin-top:.6rem}
.form input,.form textarea{width:100%;padding:.85rem 1rem;border-radius:12px;border:1px solid rgba(255,255,255,.15);background:#0f1114;color:#fff;font:inherit}
.form input:focus,.form textarea:focus{border-color:var(--brand2);outline:none;box-shadow:0 0 0 3px rgba(255,138,61,.25)}
.form .btn{margin-top:1rem}
.err{color:#ff8f7a;font-size:.85rem;min-height:1.1em}
.note{font-size:.8rem;color:#9a9ea8;margin-top:.5rem}

.footer{background:#082c5b;color:#dbeafe;text-align:center;padding:1.6rem 0;font-size:.9rem}

/* WhatsApp flotante */
.wa-float{position:fixed;right:18px;bottom:18px;width:60px;height:60px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;z-index:60;box-shadow:0 10px 25px rgba(255,99,71,.5);animation:ring 2.8s infinite}
@keyframes ring{0%,100%{box-shadow:0 10px 25px rgba(255,99,71,.5),0 0 0 0 rgba(255,99,71,.5)}50%{box-shadow:0 10px 25px rgba(255,99,71,.5),0 0 0 16px rgba(255,99,71,0)}}

/* Revelado al hacer scroll */
.reveal{opacity:0;transform:translateY(34px);transition:opacity .8s ease,transform .8s ease}
.reveal.in{opacity:1;transform:none}
.no-js .reveal{opacity:1;transform:none}

/* Responsive */
@media (max-width:900px){
  .hero-grid,.two{grid-template-columns:1fr}
  .scene{height:340px;order:-1}
  .hero{padding-top:90px}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .burger{display:flex}
  .menu{position:fixed;inset:68px 0 auto 0;background:rgba(11,61,145,.98);flex-direction:column;padding:1.6rem 0 2rem;gap:1.2rem;transform:translateY(-130%);transition:transform .35s}
  .menu.open{transform:none}
}
@media (max-width:520px){
  .section{padding:70px 0}
  .gallery{grid-template-columns:1fr}
  .cta-row .btn{width:100%;text-align:center}
}

/* Accesibilidad: menos movimiento */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}