*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  color:#1f2937;background:#f8fafc;line-height:1.55;
}
a{color:var(--principal);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.muted{color:#6b7280}
.mini{font-size:.86rem}
.center{text-align:center}
h1,h2,h3{line-height:1.2;margin:0 0 .4rem}

.topbar{background:#fff;border-bottom:1px solid #e5e7eb;position:sticky;top:0;z-index:10}
.topbar-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-weight:800;font-size:1.05rem;display:flex;align-items:center;gap:.5rem;color:#111}
.brand:hover{text-decoration:none}
.brand-dot{width:14px;height:14px;border-radius:4px;background:linear-gradient(135deg,var(--principal),var(--acento));display:inline-block}
.nav a{margin-left:1rem;font-weight:600;color:#374151}

.hero{background:linear-gradient(180deg,#ffffff, #f1f5f9);border-bottom:1px solid #e5e7eb;padding:56px 0}
.hero h1{font-size:2.1rem;font-weight:800;letter-spacing:-.02em}
.hero-compact{padding:40px 0}
.lead{font-size:1.05rem;color:#475569;max-width:70ch}

.seccion{padding:36px 0}
.sec-title{font-size:1.35rem;font-weight:800;margin-bottom:1rem}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:20px}
.card{background:#fff;border:1px solid #e5e7eb;border-radius:16px;padding:20px;display:flex;flex-direction:column;gap:.6rem;box-shadow:0 1px 2px rgba(15,23,42,.04)}
.card-pack{border-color:var(--acento)}
.card-top h3{font-size:1.15rem;margin-bottom:.15rem}
.card .sub{color:#64748b;font-size:.92rem;margin:0}
.card .desc{color:#475569;font-size:.95rem;margin:.2rem 0 0}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:1rem;padding-top:.6rem}
.precio{font-weight:800;font-size:1.2rem;color:#111}
.tag{display:inline-block;font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em;background:#fff7ed;color:#b45309;border:1px solid #fed7aa;border-radius:999px;padding:.18rem .55rem;margin-bottom:.5rem}
.tag.ok{background:#ecfdf5;color:#047857;border-color:#a7f3d0}

.btn{display:inline-block;border:none;border-radius:10px;padding:.62rem 1rem;font-weight:700;font-size:.95rem;cursor:pointer;transition:.15s;text-align:center}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-lg{padding:.85rem 1.35rem;font-size:1.02rem}
.btn-sm{padding:.4rem .75rem;font-size:.85rem}
.btn-principal{background:var(--principal);color:#fff}
.btn-principal:hover{filter:brightness(1.08)}
.btn-secundario{background:#fff;color:#111;border:1.5px solid #cbd5e1}
.btn-secundario:hover{border-color:var(--principal);color:var(--principal)}

.cta-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:1.4rem;align-items:center}
.cta-row form{margin:0}
.compra-form{display:flex;flex-wrap:wrap;gap:10px;align-items:center}
.compra-form input[type=email]{padding:.72rem .9rem;border:1.5px solid #cbd5e1;border-radius:10px;font-size:.95rem;min-width:270px;font-family:inherit}
.compra-form input[type=email]:focus{outline:none;border-color:var(--principal)}

.lecciones{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:2px}
.lecciones li{display:flex;align-items:center;gap:.9rem;background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:.85rem 1rem}
.lecciones .num{flex:0 0 28px;height:28px;border-radius:8px;background:#f1f5f9;color:#334155;font-weight:700;font-size:.85rem;display:flex;align-items:center;justify-content:center}
.lect-titulo{font-weight:600}
.lect-body{display:flex;align-items:center;justify-content:space-between;gap:1rem;width:100%}
.leccion-video{align-items:flex-start}
.badge{font-size:.7rem;font-weight:700;background:var(--acento);color:#fff;border-radius:999px;padding:.15rem .5rem;margin-left:.5rem}
.dur{margin-left:auto;color:#94a3b8;font-size:.85rem}

.footer{border-top:1px solid #e5e7eb;background:#fff;margin-top:40px;padding:24px 0;color:#475569;font-size:.9rem}

/* player */
.player-wrap{background:#000;border-radius:14px;overflow:hidden;margin:1rem 0;aspect-ratio:16/9}
.player-wrap video{width:100%;height:100%;display:block}

/* admin */
.admin-head{display:flex;align-items:center;justify-content:space-between;gap:1rem}
.admin-card{background:#fff;border:1px solid #e5e7eb;border-radius:14px;padding:16px;margin-bottom:16px}
.admin-inline{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.admin-inline input[type=text],.admin-inline input[type=number]{padding:.5rem .6rem;border:1.5px solid #cbd5e1;border-radius:8px;font-family:inherit}
.admin-inline input[type=text]{min-width:200px}
.tabla{width:100%;border-collapse:collapse;background:#fff;border:1px solid #e5e7eb;border-radius:12px;overflow:hidden;font-size:.92rem;margin-bottom:20px}
.tabla th,.tabla td{text-align:left;padding:.55rem .7rem;border-bottom:1px solid #f1f5f9}
.tabla th{background:#f8fafc;font-weight:700}
.err{color:#b91c1c;font-weight:600}