:root{
  --bg:#f7f7fb;
  --ink:#0f172a;
  --muted:#64748b;
  --primary:#4f46e5;
  --primary-600:#4338ca;
  --card:#ffffff;
  --accent:#e0e7ff;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background:var(--bg);
  color:var(--ink);
  line-height:1.6;
}
.container{max-width:1100px;margin:0 auto;padding:0 16px}
.header{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 16px;background:#fff;position:sticky;top:0;z-index:10;
  box-shadow:0 2px 10px rgba(0,0,0,.05)
}
.brand{font-weight:800;font-size:22px;color:var(--primary)}
.nav a{margin-left:18px;text-decoration:none;color:var(--ink)}
.nav a:hover{color:var(--primary)}
.hero{background:linear-gradient(135deg,var(--accent),#f5f3ff);padding:56px 0}
.hero-inner{display:grid;grid-template-columns:1.2fr .8fr;gap:24px;align-items:center}
.hero-copy h1{font-size:38px;margin:0 0 10px}
.hero-copy p{color:var(--muted);margin:0 0 18px}
.hero-art{height:220px;border-radius:24px;background:repeating-linear-gradient(45deg,#fff,#fff 10px,#e8ecff 10px,#e8ecff 20px);box-shadow:0 10px 30px rgba(79,70,229,.25)}
.btn{display:inline-block;border:none;border-radius:14px;padding:12px 18px;font-weight:600;text-decoration:none;cursor:pointer}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-600)}
.btn-whatsapp{background:#25d366;color:#fff;border-radius:12px;padding:10px 14px}
.section{padding:48px 0}
.section-alt{background:#fff}
.section-title{text-align:center;font-size:28px;margin:0 0 28px}
.grid{display:grid;gap:18px;grid-template-columns:repeat(1,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(1,minmax(0,1fr))}
.card{background:var(--card);border-radius:18px;padding:18px;box-shadow:0 10px 24px rgba(0,0,0,.06)}
.thumb{height:150px;border-radius:12px;background:#e5e7eb}
.card h3{margin:12px 0 6px}
.muted{color:var(--muted);margin:0 0 12px}
.row{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.price{font-weight:700}
.qty{width:82px;padding:8px;border:1px solid #e2e8f0;border-radius:10px}
.quote{background:#fff;border-radius:16px;padding:18px;box-shadow:0 8px 20px rgba(0,0,0,.05)}
.cite{margin-top:8px;color:var(--muted);font-weight:600}
.contact{text-align:center}
.footer{background:#0b1020;color:#cbd5e1;padding:20px 0}
.foot{display:flex;align-items:center;justify-content:space-between}
.foot-link{color:#cbd5e1;text-decoration:none}
.foot-link:hover{color:#fff}
.whatsapp-fab{position:fixed;right:16px;bottom:16px;background:#25d366;color:#fff;
  width:54px;height:54px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-size:22px;text-decoration:none;box-shadow:0 10px 24px rgba(0,0,0,.2);z-index:20}

@media (min-width:700px){
  .grid{grid-template-columns:repeat(3,minmax(0,1fr))}
  .grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
  .hero-copy h1{font-size:46px}
  .thumb{height:170px}
}