:root{
  --navy:#081a33; --blue:#0e3768; --gold:#c7a24a; --cream:#f7f5ef;
  --white:#ffffff; --ink:#172033; --muted:#687286; --line:#e5e7eb;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Arial,Helvetica,sans-serif;color:var(--ink);background:var(--cream);line-height:1.6}
a{text-decoration:none;color:inherit}
.container{width:min(1120px,92%);margin:auto}
header{background:var(--navy);color:white;position:sticky;top:0;z-index:20;box-shadow:0 2px 12px rgba(0,0,0,.12)}
.nav{display:flex;align-items:center;justify-content:space-between;min-height:72px;gap:20px}
.brand{display:flex;align-items:center;gap:12px;font-weight:700;letter-spacing:.4px}
.logo{width:42px;height:42px;border:1px solid var(--gold);border-radius:50%;display:grid;place-items:center;color:var(--gold);font-family:Georgia,serif;font-weight:700}
nav{display:flex;gap:24px;font-size:.95rem}
nav a:hover{color:var(--gold)}
.lang{border:1px solid rgba(255,255,255,.35);padding:7px 10px;border-radius:999px;font-size:.8rem}
.hero{background:linear-gradient(135deg,var(--navy),var(--blue));color:white;padding:86px 0 76px}
.hero-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:52px;align-items:center}
.eyebrow{color:var(--gold);font-weight:700;letter-spacing:1.5px;text-transform:uppercase;font-size:.78rem}
h1{font-family:Georgia,serif;font-size:clamp(2.5rem,5vw,4.6rem);line-height:1.05;margin:12px 0 20px}
.hero p{font-size:1.15rem;color:#d9e3f0;max-width:680px}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.btn{display:inline-block;padding:12px 18px;border-radius:8px;font-weight:700}
.btn-primary{background:var(--gold);color:#1d1b16}
.btn-secondary{border:1px solid #9bb0c8;color:white}
.hero-card{background:white;color:var(--ink);border-radius:18px;padding:28px;box-shadow:0 20px 50px rgba(0,0,0,.25)}
.hero-card .mini{color:var(--muted);font-size:.88rem}
.hero-card strong{display:block;font-family:Georgia,serif;font-size:1.45rem;margin:8px 0}
section{padding:72px 0}
.section-head{display:flex;justify-content:space-between;gap:20px;align-items:end;margin-bottom:30px}
.section-head h2{font-family:Georgia,serif;font-size:2rem;margin:0}
.section-head p{color:var(--muted);max-width:650px;margin:0}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:white;border:1px solid var(--line);border-radius:14px;padding:24px;box-shadow:0 8px 24px rgba(18,35,60,.05)}
.card h3{font-family:Georgia,serif;margin:10px 0 8px}
.icon{font-size:1.5rem}
.badge{display:inline-block;background:#eef4fb;color:var(--blue);padding:5px 9px;border-radius:999px;font-size:.75rem;font-weight:700}
.product{display:grid;grid-template-columns:.72fr 1.28fr;gap:28px;align-items:stretch}
.cover{min-height:340px;border-radius:16px;background:linear-gradient(160deg,#0a2547,#154e86);color:white;padding:30px;display:flex;flex-direction:column;justify-content:space-between}
.cover .gold{color:var(--gold)}
.product-info{background:white;border-radius:16px;padding:34px;border:1px solid var(--line)}
.product-info h2{font-family:Georgia,serif;font-size:2.2rem;line-height:1.15;margin:10px 0}
.checks{padding-left:20px;color:var(--muted)}
.price{font-size:1.7rem;font-weight:700;margin:20px 0 4px}
.note{font-size:.85rem;color:var(--muted)}
.future{background:#eef2f7}
footer{background:#061426;color:#cbd5e1;padding:42px 0}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:28px}
footer h4{color:white;margin-top:0}
footer a{display:block;margin:7px 0;color:#cbd5e1}
.small{font-size:.82rem;color:#91a0b5;margin-top:30px;border-top:1px solid #21324b;padding-top:20px}
.page-hero{background:var(--navy);color:white;padding:64px 0}
.page-hero h1{font-size:3rem}
.catalog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.product-card{background:white;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.product-thumb{height:170px;background:linear-gradient(145deg,#0a2547,#1b5b96);padding:22px;color:white;display:flex;align-items:end;font-family:Georgia,serif;font-size:1.3rem}
.product-body{padding:22px}
.placeholder{opacity:.72}
@media(max-width:800px){
  .hero-grid,.product,.footer-grid{grid-template-columns:1fr}
  .grid,.catalog-grid{grid-template-columns:1fr}
  nav{display:none}
  .hero{padding:60px 0}
}

/* A Casa do Futuro */
.casa-thumb{display:block;width:100%;height:auto}
.casa-cover{display:block;width:100%;height:auto;border-radius:16px}
.compra-pendente{background:#eef2f7;color:#495568}
[hidden]{display:none!important}

/* Idiomas do e-book Quando a IA Ganha um Corpo */
.language-option{border:1px solid var(--line);color:var(--blue)}
.language-option[aria-current=page]{background:var(--gold);color:var(--ink);border-color:var(--gold)}
a:focus-visible{outline:3px solid var(--gold);outline-offset:4px}

/* Private edition 2.1 */
.private-banner{background:#102a39;color:#fff;text-align:center;padding:12px 18px;font:600 14px/1.5 Arial,sans-serif}button:disabled{cursor:not-allowed;opacity:.65}.edition-switch{margin:18px 0}