:root{
  --bg:#faf9f7; /* claro, tipo mármol */
  --card:#ffffff;
  --accent:#b11217; /* rojo portada */
  --gold:#e6b22a; /* dorado tipográfico */
  --muted:#6b6b6b;
  --glass: rgba(0,0,0,0.04);
}
*{box-sizing:border-box}
.html,body{height:100%;margin:0;font-family:Inter,system-ui,-apple-system,'Segoe UI',Roboto,'Helvetica Neue',Arial; background: #f6f6f5; color:#0b1220}
.container{max-width:1100px;margin:0 auto;padding:1.5rem}
.site-header{position:static;z-index:30;background:#fff;border-bottom:1px solid rgba(11,18,32,0.08)}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:1.25rem 0}
.brand{display:inline-flex;align-items:center;gap:0.85rem;font-size:1.75rem;margin:0;font-weight:800;letter-spacing:0.6px;color:var(--accent);text-transform:uppercase;line-height:1.05;padding:0.8rem 1rem;background:linear-gradient(90deg, rgba(177,18,23,0.12), rgba(255,255,255,0));border-radius:999px;border:1px solid rgba(177,18,23,0.14);box-shadow:0 14px 35px rgba(11,18,32,0.08)}
.brand::before{content:'LIBRO';display:inline-flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:12px;background:var(--accent);color:white;font-size:0.72rem;font-weight:800;text-transform:uppercase;letter-spacing:0.14em}
.nav .cta{background:transparent;border:1px solid rgba(11,18,32,0.06);padding:0.45rem 0.8rem;border-radius:8px;color:var(--muted);text-decoration:none}
.hero{padding:2.75rem 0}
.hero-grid{display:grid;grid-template-columns:1fr 380px;gap:1.5rem;align-items:center}
.hero-text{max-width:660px}
.eyebrow{color:var(--muted);margin:0 0 0.5rem;font-weight:700;letter-spacing:0.06em;text-transform:none;font-size:1.8rem;line-height:1.2}
.title{font-size:1.95rem;line-height:1.15;margin:0 0 1rem;color:var(--accent);font-weight:800;letter-spacing:-0.03em}
.lead{color:#222;margin:0 0 1rem;font-size:0.82rem;line-height:1.55;max-width:680px;opacity:0.82}
.features{list-style:none;padding:0;margin:0 0 1rem}
.features li{margin:0.4rem 0;color:#333}
.summary{color:var(--muted);margin-bottom:1.25rem}
.buy-btn{display:inline-block;background:linear-gradient(90deg,var(--accent),#8a0f14);color:white;padding:0.7rem 1rem;border-radius:12px;text-decoration:none;font-weight:700;font-size:0.95rem;box-shadow:0 8px 20px rgba(177,18,23,0.18)}
.buy-btn:hover{transform:translateY(-2px);filter:brightness(1.03)}
#paquete0_whatsapp{background:#25D366;box-shadow:0 8px 20px rgba(37,211,102,0.2);}
#paquete0_whatsapp:hover{filter:brightness(1.08)}

.hero-card{display:flex;justify-content:center}
.book-mockup{width:280px;height:auto;background:transparent;border-radius:8px;box-shadow:0 12px 30px rgba(11,18,32,0.06);position:relative;overflow:hidden;padding:0}
.book-mockup .cover-img{display:block;width:100%;height:auto;border-radius:6px}
.book-title{font-size:1.05rem;margin:0 0 0.6rem}
.book-author{margin:0;color:var(--muted);font-size:0.9rem}

.about,.author{padding:1.25rem 0}
.about h3,.author h3{margin:0 0 0.4rem;color:#111}
.about p, .author p{margin:0 0 0.6rem}
.site-footer{padding:1rem 0;color:var(--muted)}

/* Paquetes */
.packages h3{margin:0 0 0.75rem;color:var(--accent)}
.packages-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1rem;margin-bottom:1.5rem;grid-auto-rows:1fr}
.package-card{background:var(--card);padding:1rem;border-radius:10px;box-shadow:0 8px 20px rgba(11,18,32,0.04);display:flex;flex-direction:column;align-items:center;text-align:center;justify-content:flex-start;min-height:420px;height:100%}
.package-img{width:100%;height:240px;object-fit:contain;border-radius:6px;margin-bottom:0.75rem;background:linear-gradient(180deg,#fafafa,#f2f2f2);padding:8px}
.package-card h4{margin:0 0 0.5rem;color:var(--accent)}
.package-title-placeholder{visibility:hidden;min-height:2.1rem;display:block;margin:0 0 0.5rem;font-size:1.3rem;line-height:1.15;}
.package-desc{color:var(--muted);font-size:0.95rem;margin-bottom:0.75rem}
.package-price{font-weight:800;color:#111;margin-bottom:0.6rem}
.package-card .buy-btn{width:auto;max-width:100%;padding:0.6rem 1rem;border-radius:8px;min-width:180px;margin-top:auto}

/* Payment option radios */
.payment-options{display:flex;gap:0.6rem;align-items:center;justify-content:center;margin-bottom:0.6rem}
.payment-options input{position:absolute;opacity:0;width:1px;height:1px;margin:0;clip:rect(0 0 0 0);}
.payment-chip{display:inline-flex;align-items:center;gap:0.6rem;background:var(--glass);padding:0.45rem 0.8rem;border-radius:10px;font-weight:700;color:var(--muted);font-size:0.95rem;border:1px solid rgba(11,18,32,0.04);cursor:pointer;transition:all .14s ease}
.payment-chip svg{flex:0 0 auto;color:var(--accent);opacity:0.95}
.payment-chip span{display:inline-block}
.payment-chip:hover{transform:translateY(-3px);filter:brightness(1.02)}
.payment-options input:checked + .payment-chip{background:linear-gradient(90deg,var(--accent),#8a0f14);color:white;border-color:transparent;box-shadow:0 8px 18px rgba(177,18,23,0.14)}

/* Estado deshabilitado para botones de compra */
.buy-btn.disabled{opacity:0.6;pointer-events:none;filter:grayscale(0.06);cursor:not-allowed}

.payment-hint{color:var(--muted);background:transparent;padding:0.25rem 0.4rem;border-radius:4px;font-weight:600;font-size:0.88rem;text-align:center;margin-bottom:0.6rem}
.payment-hint.alert{color:var(--accent);background:rgba(177,18,23,0.06);padding:0.35rem 0.6rem;border-radius:6px;font-weight:700;font-size:0.92rem}

@media (max-width:900px){
  .packages-grid{grid-template-columns:1fr;}
  .package-img{height:280px}

  .package-card{min-height:520px}
}

@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr;}
  .hero{padding:1.75rem 0}
  .book-mockup{width:210px;height:300px;margin:0 auto}
  .container{padding:0.75rem}
}