:root{--bg:#f7f4ee;--text:#1d1d1f;--muted:#656565;--dark:#151515;--accent:#b5121b;--accent2:#d97706;--green:#25d366;--card:#ffffff;--line:#e4ddd1;--concrete:#b8b4ab}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.55}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.container{width:min(1160px,92vw);margin:0 auto}.site-header{position:sticky;top:0;z-index:50;background:rgba(247,244,238,.95);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);box-shadow:0 8px 30px rgba(36,32,26,.06)}.logo-band{display:flex;align-items:center;justify-content:space-between;gap:26px;padding:18px 0}.logo-link{display:block;min-width:0}.logo-link img{width:min(650px,58vw);height:auto}.header-actions{display:grid;gap:12px;min-width:190px}.quick-btn{display:flex;align-items:center;justify-content:center;gap:10px;border-radius:18px;padding:14px 20px;color:#fff;font-weight:900;font-size:18px;box-shadow:0 12px 28px rgba(0,0,0,.14);transition:.2s transform,.2s filter}.quick-btn:hover{transform:translateY(-1px);filter:brightness(1.05)}.quick-btn.call{background:linear-gradient(135deg,#cf1d29,#8e0f16)}.quick-btn.whats{background:linear-gradient(135deg,#31c95b,#148c35)}.nav-row{border-top:1px solid var(--line);background:rgba(255,255,255,.45)}.nav-wrap{min-height:58px;display:flex;align-items:center;justify-content:center;gap:26px}.links{display:flex;gap:34px;align-items:center;font-weight:900;text-transform:uppercase;letter-spacing:.02em;color:#252525}.links a{position:relative;padding:18px 0}.links a:hover{color:var(--accent)}.links a:after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:3px;background:var(--accent);transform:scaleX(0);transition:.2s}.links a:hover:after{transform:scaleX(1)}.menu-toggle{display:none;border:0;background:var(--dark);color:#fff;border-radius:14px;width:48px;height:44px;font-size:25px;font-weight:900}.hero{min-height:76vh;display:grid;align-items:end;position:relative;isolation:isolate;color:#fff;background:#111;overflow:hidden}.hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.78),rgba(0,0,0,.44),rgba(0,0,0,.18));z-index:-1}.hero img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2}.hero-content{padding:112px 0 76px}.eyebrow{text-transform:uppercase;letter-spacing:.16em;font-weight:900;color:#f7c16c;font-size:13px}.hero h1{font-size:clamp(42px,7vw,86px);line-height:.96;margin:16px 0 18px;max-width:900px}.hero p{font-size:clamp(18px,2.2vw,24px);max-width:720px;color:#f1f1f1;margin:0 0 28px}.actions{display:flex;gap:14px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;padding:14px 22px;font-weight:900;border:1px solid rgba(255,255,255,.24);cursor:pointer}.btn.dark{background:var(--dark);color:#fff}.btn.light{background:#fff;color:#111}.btn.orange{background:var(--accent);color:#fff;border-color:var(--accent)}.btn.green{background:var(--green);color:#fff;border-color:var(--green)}.btn.wide{width:100%;margin-top:16px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:24px;overflow:hidden;transform:translateY(-42px);box-shadow:0 20px 60px rgba(0,0,0,.08)}.stat{background:#fff;padding:26px}.stat strong{font-size:28px}.stat span{display:block;color:var(--muted);font-weight:700}.section{padding:54px 0}.section-head{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:28px}.section h2{font-size:clamp(32px,5vw,58px);line-height:1;margin:0}.section .lead{max-width:630px;color:var(--muted);font-size:18px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.card{background:var(--card);border:1px solid var(--line);border-radius:26px;overflow:hidden;box-shadow:0 12px 40px rgba(36,32,26,.06)}.product img{height:240px;width:100%;object-fit:cover}.product-body{padding:22px}.product h3{margin:0 0 8px;font-size:23px}.product p{margin:0;color:var(--muted)}.calculator-section{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.calc-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:30px;align-items:center}.calc-card{background:var(--bg);border:1px solid var(--line);border-radius:30px;padding:28px;box-shadow:0 12px 40px rgba(36,32,26,.06)}.calc-inputs{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.calc-inputs label{font-weight:900;color:#333}.calc-inputs input{width:100%;margin-top:7px;border:1px solid var(--line);border-radius:16px;padding:14px 15px;font:inherit;background:#fff}.calc-result{margin-top:18px;background:var(--dark);color:#fff;border-radius:22px;padding:22px;display:grid;gap:4px}.calc-result span{text-transform:uppercase;letter-spacing:.12em;color:#ccc;font-size:12px;font-weight:900}.calc-result strong{font-size:44px;line-height:1}.calc-result small{color:#eee;font-size:16px}.features{display:grid;grid-template-columns:1.05fr .95fr;gap:26px;align-items:center}.panel{background:var(--dark);color:#fff;border-radius:32px;padding:36px}.panel h2{color:#fff}.panel p{color:#d5d5d5}.checks{display:grid;gap:14px;margin-top:24px}.check{display:flex;gap:12px;align-items:flex-start;font-weight:800}.check:before{content:"✓";background:var(--accent);color:#fff;width:28px;height:28px;border-radius:50%;display:grid;place-items:center;flex:0 0 28px}.factory{border-radius:32px;overflow:hidden;min-height:410px}.factory img{height:100%;width:100%;object-fit:cover}.gallery{columns:3 260px;column-gap:18px}.gallery a{display:block;break-inside:avoid;margin-bottom:18px;border-radius:22px;overflow:hidden;background:#fff;border:1px solid var(--line);box-shadow:0 10px 30px rgba(0,0,0,.06);cursor:zoom-in}.gallery img{width:100%;height:auto;transition:.35s}.gallery a:hover img{transform:scale(1.04)}.contact{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}.contact-card{background:var(--bg);border:1px solid var(--line);border-radius:30px;padding:32px}.contact-card h3{font-size:34px;margin:0 0 12px}.contact-list{display:grid;gap:12px;margin-top:22px}.contact-list a,.contact-list div{background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px 16px;font-weight:800}.form{display:grid;gap:12px}.form input,.form select,.form textarea{width:100%;border:1px solid var(--line);border-radius:16px;padding:14px 15px;font:inherit;background:#fff}.form textarea{min-height:120px}.footer{background:var(--dark);color:#fff;padding:34px 0}.footer-row{display:flex;justify-content:space-between;gap:20px;align-items:center}.whatsapp{position:fixed;right:18px;bottom:18px;z-index:60;background:#25d366;color:#fff;border-radius:999px;padding:14px 18px;font-weight:900;box-shadow:0 16px 40px rgba(0,0,0,.22)}.lightbox{position:fixed;inset:0;background:rgba(0,0,0,.88);z-index:100;display:none;align-items:center;justify-content:center;padding:54px 18px}.lightbox.open{display:flex}.lightbox img{max-width:min(1100px,96vw);max-height:86vh;border-radius:16px;box-shadow:0 20px 70px rgba(0,0,0,.5)}.lightbox-close{position:fixed;top:18px;right:20px;width:48px;height:48px;border-radius:999px;border:1px solid rgba(255,255,255,.25);background:#fff;color:#111;font-size:34px;line-height:1;cursor:pointer;font-weight:300}.lightbox-close:hover{background:#f1f1f1}@media(max-width:950px){.logo-band{display:grid;gap:14px;padding:12px 0}.logo-link img{width:100%}.header-actions{grid-template-columns:1fr 1fr;min-width:0}.quick-btn{border-radius:14px;font-size:15px;padding:11px 12px}.nav-wrap{justify-content:space-between;min-height:56px}.menu-toggle{display:block}.links{position:absolute;left:4vw;right:4vw;top:100%;display:none;flex-direction:column;gap:0;background:#fff;border:1px solid var(--line);border-radius:22px;padding:10px;box-shadow:0 24px 60px rgba(0,0,0,.18)}.links.open{display:flex}.links a{width:100%;padding:15px 18px;border-radius:14px}.links a:hover{background:var(--bg)}.links a:after{display:none}.hero{min-height:70vh}.hero-content{padding:86px 0 54px}.stats{grid-template-columns:1fr;transform:translateY(-24px)}.grid{grid-template-columns:1fr}.section-head{display:block}.features,.contact-grid,.calc-grid{grid-template-columns:1fr}.calc-inputs{grid-template-columns:1fr}.product img{height:250px}.footer-row{display:block}.btn{width:100%}.actions{gap:10px}.whatsapp{left:18px;text-align:center}.section{padding:42px 0}.calc-result strong{font-size:36px}}@media(max-width:440px){.quick-btn span{font-size:14px}.header-actions{gap:8px}.logo-band{padding:10px 0}.hero h1{font-size:40px}.hero p{font-size:17px}.product img{height:220px}.contact-card{padding:24px}}


/* v4: mobile sticky header + floating call button */
.mobile-menu-toggle{display:none}
.floating-call{position:fixed;right:18px;bottom:76px;z-index:61;width:54px;height:54px;border-radius:999px;background:linear-gradient(135deg,#cf1d29,#8e0f16);color:#fff;display:grid;place-items:center;font-size:25px;font-weight:900;box-shadow:0 16px 40px rgba(0,0,0,.24);border:1px solid rgba(255,255,255,.35)}
.floating-call:hover{filter:brightness(1.06);transform:translateY(-1px)}
@media(max-width:950px){
  .site-header{position:sticky;top:0;z-index:80;background:rgba(247,244,238,.98);box-shadow:0 8px 24px rgba(36,32,26,.12)}
  .logo-band{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:70px;padding:8px 0}
  .logo-link{flex:1 1 auto;min-width:0}
  .logo-link img{width:min(285px,72vw);max-height:58px;object-fit:contain;object-position:left center}
  .header-actions{display:none}
  .mobile-menu-toggle{display:grid;place-items:center;flex:0 0 48px;margin-left:auto}
  .nav-row{border-top:0;background:transparent}
  .nav-wrap{min-height:0;position:static}
  .nav-wrap>.menu-toggle{display:none}
  .links{position:fixed;left:4vw;right:4vw;top:78px;z-index:90;max-height:calc(100vh - 96px);overflow:auto}
  .whatsapp{left:auto;right:18px;bottom:14px;text-align:center;padding:13px 17px}
  .floating-call{right:18px;bottom:74px}
}
@media(max-width:440px){
  .logo-link img{width:min(260px,70vw);max-height:54px}
  .logo-band{min-height:66px}
  .links{top:74px}
  .floating-call{width:52px;height:52px;bottom:72px}
}

/* v4.1: desktop sticky header refinement */
@media (min-width: 951px){
  .logo-band{
    position: relative;
    justify-content: center;
    padding: 14px 0;
  }
  .logo-link{
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
  }
  .logo-link img{
    width: min(460px, 42vw);
    max-height: 82px;
    object-fit: contain;
  }
  .header-actions{
    display: none;
  }
  .nav-row{
    background: rgba(255,255,255,.62);
  }
  .nav-wrap{
    min-height: 54px;
  }
}