:root{
  --red:#D71920;
  --black:#1B1B1B;
  --gray:#F5F5F5;
  --white:#fff;
  --muted:#6f6f6f;
  --radius:22px;
  --shadow:0 24px 70px rgba(0,0,0,.13);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:Inter,Poppins,sans-serif;color:var(--black);background:var(--white);line-height:1.6}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.container{width:min(1180px,92%);margin:auto}

.site-header{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  z-index:99;
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(14px);
  box-shadow:0 6px 30px rgba(0,0,0,.08);
}
.nav{height:78px;display:flex;align-items:center;justify-content:space-between}
.logo img{height:50px;object-fit:contain}
.nav-links{display:flex;align-items:center;gap:26px;font-weight:700;font-size:.95rem}
.nav-phone{background:var(--red);color:#fff;padding:12px 18px;border-radius:999px}
.menu-toggle{display:none;background:none;border:0;font-size:2rem}

.video-banner-fester{
  position:relative;
  width:100%;
  min-height:520px;
  height:72vh;
  margin-top:78px;
  overflow:hidden;
  background:#111;
}
.video-banner-fester video{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.video-banner-fester::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg, rgba(0,0,0,.62), rgba(0,0,0,.18) 55%, rgba(0,0,0,.42));
  z-index:1;
  pointer-events:none;
}
.video-banner-content{
  position:absolute;
  z-index:2;
  left:50%;
  bottom:44px;
  transform:translateX(-50%);
  width:min(1180px,92%);
  color:#fff;
}
.video-banner-content span{
  display:inline-block;
  background:var(--red);
  color:#fff;
  padding:10px 18px;
  border-radius:999px;
  font-weight:900;
  text-transform:uppercase;
  letter-spacing:.06em;
  font-size:.82rem;
  margin-bottom:14px;
}
.video-banner-content h2{
  max-width:850px;
  color:#fff;
  font-family:Montserrat,Poppins,sans-serif;
  font-size:clamp(2rem,4.5vw,4.6rem);
  line-height:1.05;
  font-weight:900;
  text-shadow:0 14px 40px rgba(0,0,0,.5);
}

.hero{
  position:relative;
  display:flex;
  align-items:center;
  padding:95px 0 85px;
  background:linear-gradient(90deg,rgba(0,0,0,.78),rgba(0,0,0,.44)),url('assets/img/impermeabilizacion-prefabricada-fester-queretaro.jpg') center/cover no-repeat;
  color:#fff;
}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:42px;align-items:center}
.eyebrow{
  display:inline-flex;
  background:rgba(215,25,32,.12);
  color:var(--red);
  font-weight:900;
  text-transform:uppercase;
  letter-spacing:.08em;
  font-size:.78rem;
  padding:9px 14px;
  border-radius:999px;
  margin-bottom:18px;
}
.hero .eyebrow{background:rgba(255,255,255,.16);color:#fff}
h1,h2,h3{font-family:Montserrat,Poppins,sans-serif;line-height:1.08}
h1{font-size:clamp(2.6rem,6vw,5.6rem);font-weight:900;max-width:860px}
.hero p{font-size:1.18rem;max-width:720px;margin:22px 0;color:rgba(17, 17, 17,)}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin:28px 0}
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;padding:15px 24px;font-weight:900;transition:.25s ease;border:2px solid transparent}
.btn-primary{background:var(--red);color:#fff}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 16px 35px rgba(215,25,32,.35)}
.btn-secondary{border-color:#fff;color:#fff}
.btn-secondary:hover{background:#fff;color:var(--black)}
.btn-light{background:#fff;color:var(--red)}
.btn-dark{background:var(--black);color:#fff}
.trust-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}
.trust-row span{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.2);padding:9px 12px;border-radius:999px;font-weight:700}
.hero-card{background:rgba(255,255,255,.95);color:var(--black);padding:34px;border-radius:var(--radius);box-shadow:var(--shadow)}
.hero-card h2{font-size:2rem;color:var(--red)}
.hero-card ul{margin-left:18px;margin-top:18px;font-weight:700}

.section{padding:95px 0}
.section:nth-child(even){background:var(--gray)}
.section-heading{text-align:center;max-width:850px;margin:0 auto 48px}
.section-heading h2{font-size:clamp(2rem,3.5vw,3.5rem)}
.section-heading p{margin-top:16px;color:var(--muted);font-size:1.08rem}

.problem-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:24px;
  margin-top:50px;
}
.problem-card{
  background:#fff;
  border-radius:18px;
  overflow:hidden;
  box-shadow:0 10px 30px rgba(0,0,0,.08);
  transition:.35s ease;
  border:1px solid rgba(0,0,0,.05);
}
.problem-card:hover{
  transform:translateY(-8px);
  box-shadow:0 20px 40px rgba(0,0,0,.12);
}
.problem-card img{
  width:100%;
  height:240px;
  object-fit:cover;
  display:block;
}
.problem-content{
  padding:24px;
}
.problem-content h3{
  color:var(--red);
  margin-bottom:12px;
  font-size:1.2rem;
  font-weight:800;
}
.problem-content p{
  color:#555;
  line-height:1.6;
}

.product-grid,.benefit-grid{display:grid;gap:18px}
.product-grid{grid-template-columns:repeat(4,1fr)}
.product-card,.benefit{
  background:#fff;
  border-radius:var(--radius);
  padding:24px;
  box-shadow:0 16px 40px rgba(0,0,0,.08);
  border:1px solid rgba(0,0,0,.05);
  transition:.25s ease;
}
.product-card:hover,.service-card:hover,.store-card:hover{transform:translateY(-7px);box-shadow:var(--shadow)}
.product-card span{font-weight:900;color:var(--red);font-size:2rem;opacity:.35}
.product-card h3{font-size:1.25rem;margin:10px 0}

.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.service-card{
  background:#fff;
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:0 18px 50px rgba(0,0,0,.09);
  border:1px solid rgba(0,0,0,.05);
  transition:.25s ease;
}
.service-card img{height:220px;width:100%;object-fit:cover}
.service-card div{padding:22px}
.service-card h3{font-size:1.15rem;color:var(--red);margin-bottom:8px}

.benefit-grid{grid-template-columns:repeat(4,1fr)}
.benefit{font-weight:900}

.store-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.store-card{
  background:#fff;
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:0 18px 50px rgba(0,0,0,.10);
  border:1px solid rgba(0,0,0,.06);
  transition:.25s ease;
}
.store-card img{width:100%;height:315px;object-fit:cover;object-position:center}
.store-card div{padding:22px}
.store-card h3{color:var(--red);margin-bottom:8px}
.store-card p{color:var(--muted);margin-bottom:16px}
.store-card a{display:inline-flex;font-weight:900;color:var(--red)}

.testimonial-slider{max-width:780px;margin:auto;position:relative}
.testimonial{display:none;background:#fff;border-radius:var(--radius);padding:36px;text-align:center;box-shadow:var(--shadow);font-size:1.2rem;font-weight:600}
.testimonial.active{display:block}
.stars{color:var(--red);font-size:1.5rem;margin-bottom:14px}
.faq-list{max-width:900px;margin:auto;display:grid;gap:14px}
details{background:#fff;border-radius:18px;padding:20px 24px;box-shadow:0 14px 35px rgba(0,0,0,.07)}
summary{font-weight:900;cursor:pointer;font-size:1.05rem}
details p{margin-top:12px;color:var(--muted)}

.final-cta{background:linear-gradient(135deg,#D71920,#9e1015);color:#fff;text-align:center;padding:90px 0}
.final-cta h2{font-size:clamp(2rem,4vw,4rem)}
.final-cta p{max-width:780px;margin:18px auto 0;font-size:1.15rem}
.center{justify-content:center}
.footer{background:#111;color:#fff;padding:42px 0}
.footer-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;color:rgba(255,255,255,.82)}

.reveal{opacity:0;transform:translateY(22px);transition:all .75s ease}
.reveal.visible{opacity:1;transform:none}

@media(max-width:980px){
  .menu-toggle{display:block}
  .nav-links{
    position:absolute;
    top:78px;
    left:0;
    background:#fff;
    flex-direction:column;
    align-items:flex-start;
    padding:24px;
    width:100%;
    display:none;
    box-shadow:0 16px 35px rgba(0,0,0,.12);
  }
  .nav-links.active{display:flex}
  .hero-grid{grid-template-columns:1fr}
  .product-grid,.benefit-grid,.service-grid,.store-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .video-banner-fester{
    margin-top:70px;
    height:58vh;
    min-height:360px;
  }
  .video-banner-content{bottom:28px}
  .video-banner-content h2{font-size:2.15rem}
}
@media(max-width:620px){
  .nav{height:70px}
  .logo img{height:42px}
  .product-grid,.benefit-grid,.service-grid,.store-grid,.footer-grid{grid-template-columns:1fr}
  .service-card img{height:235px}
  .store-card img{height:360px}
  .btn{width:100%}
}