:root{
  --primario:#1B3A5C;--secundario:#2E7D32;--acento:#E8A317;
  --fondo:#FFFFFF;--fondo-alt:#F5F5F5;--texto:#1A1A1A;--suave:#566170;--linea:#E5E7EB;
  --cta:#2E7D32;--cta-hover:#1B5E20;--cta-texto:#FFFFFF;--titulo:#1B3A5C;--tarjeta:#FFFFFF;--enlace:#1B3A5C;
  --fuente:-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;
  --nav-alto:72px;
}
@media (prefers-color-scheme:dark){
  :root:not([data-tema="claro"]){--fondo:#111827;--fondo-alt:#1F2937;--texto:#F3F4F6;--suave:#A3AEBD;--linea:#374151;--titulo:#DCE7F5;--tarjeta:#1F2937;--cta:#43A047;--cta-hover:#2E7D32;--enlace:#9CC3F0}
}
:root[data-tema="oscuro"]{--fondo:#111827;--fondo-alt:#1F2937;--texto:#F3F4F6;--suave:#A3AEBD;--linea:#374151;--titulo:#DCE7F5;--tarjeta:#1F2937;--cta:#43A047;--cta-hover:#2E7D32;--enlace:#9CC3F0}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:var(--nav-alto)}
body{margin:0;font-family:var(--fuente);font-size:16px;line-height:1.6;color:var(--texto);background:var(--fondo)}
img{max-width:100%;height:auto;display:block}
h1,h2,h3{color:var(--titulo);line-height:1.2;margin:0 0 12px}
h1{font-size:clamp(2rem,5vw,3.25rem);font-weight:700}
h2{font-size:clamp(1.6rem,3.5vw,2.25rem);font-weight:700;text-align:center;margin-bottom:32px}
h3{font-size:1.15rem;font-weight:700}
p{margin:0 0 16px}
a{color:var(--enlace)}
:focus-visible{outline:3px solid var(--acento);outline-offset:2px}
.contenedor{max-width:1200px;margin:0 auto;padding:0 24px}
.angosto{max-width:800px}
.seccion{padding:48px 0}
.alt{background:var(--fondo-alt)}
.saltar{position:absolute;left:-999px;top:8px;background:var(--primario);color:#fff;padding:8px 16px;border-radius:8px;z-index:100}
.saltar:focus{left:8px}

/* botones */
.btn-primario,.btn-blanco,.btn-acceder{display:inline-block;text-decoration:none;font-weight:600;border-radius:8px;transition:background .2s}
.btn-primario{background:var(--cta);color:#fff;padding:14px 32px}
.btn-primario:hover{background:var(--cta-hover)}
.btn-blanco{background:#fff;color:var(--primario);padding:14px 32px}
.btn-blanco:hover{background:#E8EEF5}
.btn-acceder{border:2px solid var(--enlace);color:var(--enlace);padding:8px 18px}
.btn-acceder:hover{background:var(--enlace);color:var(--fondo)}
.enlace-sec{font-weight:600;padding:14px 8px}

/* navbar */
.navbar{position:fixed;top:0;left:0;right:0;height:var(--nav-alto);background:var(--fondo);border-bottom:1px solid transparent;z-index:50;transition:height .2s,box-shadow .2s,border-color .2s}
.navbar.scrolled{height:56px;box-shadow:0 2px 8px rgba(0,0,0,.08);border-color:var(--linea)}
.nav-interior{height:100%;display:flex;align-items:center;gap:24px}
.marca{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700;font-size:1.25rem;color:var(--titulo)}
.nav-links{display:flex;gap:28px;margin:0 auto}
.nav-links a{text-decoration:none;color:var(--texto);font-weight:500}
.nav-links a:hover{color:var(--secundario)}
.nav-acciones{display:flex;align-items:center;gap:12px;margin-left:auto}
.btn-tema{background:none;border:1px solid var(--linea);color:var(--suave);border-radius:8px;padding:6px 12px;font:inherit;font-size:.85rem;cursor:pointer}
.nav-toggle{display:none;background:none;border:0;width:44px;height:44px;cursor:pointer;flex-direction:column;justify-content:center;gap:5px;align-items:center}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--texto)}
main{padding-top:var(--nav-alto)}

/* hero */
.hero{padding-top:48px}
.hero-grid{display:grid;grid-template-columns:45fr 55fr;gap:48px;align-items:center}
.subtitulo{font-size:1.15rem;color:var(--suave);max-width:34em}
.hero-botones{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin:24px 0 12px}
.microcopy{font-size:.9rem;color:var(--suave);margin:0}
.marco{border:1px solid var(--linea);border-radius:12px;overflow:hidden;background:var(--tarjeta);box-shadow:0 12px 32px rgba(27,58,92,.15)}
.marco-barra{display:flex;gap:6px;padding:10px 12px;background:var(--fondo-alt);border-bottom:1px solid var(--linea)}
.marco-barra i{width:10px;height:10px;border-radius:50%;background:#C4C9D0}

/* confianza */
.confianza{background:var(--fondo-alt);padding:32px 0}
.confianza-titulo{text-align:center;font-weight:600;color:var(--titulo);margin-bottom:20px}
.indicadores{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:16px;text-align:center}
.indicadores strong{display:block;color:var(--titulo)}
.indicadores span{font-size:.9rem;color:var(--suave)}

/* problemas */
.grid-problemas{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tarjeta{background:var(--tarjeta);border:1px solid var(--linea);border-radius:12px;padding:24px;transition:box-shadow .2s,transform .2s}
.tarjeta:hover{box-shadow:0 8px 20px rgba(0,0,0,.1);transform:translateY(-2px)}
.tarjeta p{margin:0;color:var(--suave)}

/* tabs */
.tabs{display:flex;gap:4px;overflow-x:auto;border-bottom:1px solid var(--linea);margin-bottom:32px}
.tabs button{background:none;border:0;border-bottom:3px solid transparent;padding:12px 18px;font:inherit;font-weight:600;color:var(--suave);cursor:pointer;white-space:nowrap}
.tabs button[aria-selected="true"]{color:var(--titulo);border-bottom-color:var(--enlace)}
.panel{display:grid;grid-template-columns:40fr 60fr;gap:40px;align-items:center;animation:aparecer .25s}
.panel[hidden]{display:none}
.panel ul{padding-left:20px;margin:0;color:var(--suave)}
.nota{text-align:center;font-size:.85rem;color:var(--suave);margin:24px 0 0}
@keyframes aparecer{from{opacity:0}to{opacity:1}}

/* prueba */
.prueba{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.prueba h2{text-align:left}
.pasos{margin:0;padding-left:24px;display:grid;gap:12px}

/* precios */
.sub{text-align:center;color:var(--suave);margin-top:-16px;margin-bottom:32px}
.plan{max-width:520px;margin:0 auto;background:var(--tarjeta);border:2px solid var(--secundario);border-radius:12px;padding:32px;text-align:center}
.precio{font-size:1.75rem;font-weight:700;color:var(--titulo);margin-bottom:16px}
.check{list-style:none;padding:0;margin:0 0 24px;text-align:left;display:grid;gap:10px}
.check li{padding-left:28px;position:relative}
.check li::before{content:"";position:absolute;left:4px;top:.45em;width:12px;height:7px;border-left:3px solid var(--secundario);border-bottom:3px solid var(--secundario);transform:rotate(-45deg)}

/* faq */
details{border:1px solid var(--linea);border-radius:8px;margin-bottom:12px;background:var(--tarjeta)}
summary{cursor:pointer;padding:16px 20px;font-weight:600;color:var(--titulo);list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-size:1.4rem;line-height:1}
details[open] summary::after{content:"\2212"}
details p{padding:0 20px;margin:0 0 16px;color:var(--suave)}

/* cta final y pie */
.cta-final{background:var(--primario);color:#fff;text-align:center;padding:64px 0}
.cta-final h2{color:#fff;margin-bottom:12px}
.cta-final .microcopy{color:#C9D6E6;margin-top:16px}
.pie{background:#111827;color:#C9D1DC;padding:48px 0 24px}
.pie-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px}
.pie-marca{color:#fff;font-size:1.25rem}
.pie h3{color:#fff;font-size:.95rem;margin-bottom:8px}
.pie a,.pie span{display:block;color:#C9D1DC;text-decoration:none;padding:4px 0}
.pie a:hover{color:#fff;text-decoration:underline}
.copy{text-align:center;font-size:.85rem;margin:32px 0 0;color:#9AA5B4}

/* legales */
.legal{padding:48px 0;max-width:800px}
.legal h1{font-size:2rem}
.legal h2{text-align:left;font-size:1.25rem;margin:32px 0 8px}
.aviso-legal{background:var(--fondo-alt);border-left:4px solid var(--acento);padding:12px 16px;border-radius:4px;color:var(--texto)}

/* aparición */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .5s,transform .5s}
.reveal.visible{opacity:1;transform:none}

@media (max-width:960px){
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:0;background:var(--fondo);border-bottom:1px solid var(--linea);margin:0;padding:8px 24px 16px}
  .nav-links.abierto{display:flex}
  .nav-links a{padding:12px 0}
  .nav-toggle{display:flex}
  .hero-grid,.panel,.prueba{grid-template-columns:1fr;gap:24px}
  .grid-problemas{grid-template-columns:repeat(2,1fr)}
  .indicadores{grid-template-columns:repeat(2,1fr)}
  .pie-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:600px){
  .seccion{padding:40px 0}
  .grid-problemas{grid-template-columns:1fr}
  .btn-tema{display:none}
  .pie-grid{grid-template-columns:1fr}
  .hero-botones .btn-primario{width:100%;text-align:center}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
  .reveal{opacity:1;transform:none}
}