:root{--primary:#6366F1;--accent:#10B981;--bg:#0B0F19;--card:#151D2A;--border:#232D3F;--text:#F8FAFC;--muted:#94A3B8}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',system-ui,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}
a{color:inherit}
:focus-visible{outline:3px solid #A5B4FC;outline-offset:3px}
.wrap{max-width:1000px;margin:0 auto;padding:0 1.25rem}
section{padding:3.5rem 0}
h2{font-size:1.7rem;margin-bottom:.6rem}
.lead{color:var(--muted);max-width:60ch;margin-bottom:2rem}

/* Barra superior */
.bar{position:sticky;top:0;z-index:5;background:rgba(11,15,25,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}
.bar .wrap{display:flex;justify-content:space-between;align-items:center;height:64px}
.logo{font-family:'Syne',sans-serif;font-weight:800;font-size:1.6rem;letter-spacing:-1px;text-transform:uppercase;background:linear-gradient(135deg,#818CF8,#C084FC);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* Botones */
.btn{display:inline-block;padding:.85rem 1.4rem;border-radius:.75rem;background:var(--border);color:var(--text);font-weight:600;text-decoration:none;text-align:center;transition:background .2s,box-shadow .2s}
.btn:hover{background:#2D3748}
.btn-primary{background:linear-gradient(135deg,#6366F1,#4F46E5);box-shadow:0 4px 14px rgba(99,102,241,.35)}
.btn-primary:hover{background:linear-gradient(135deg,#6366F1,#4F46E5);box-shadow:0 6px 20px rgba(99,102,241,.5)}
.btn-sm{padding:.55rem 1rem;font-size:.9rem}

/* Portada */
.hero{padding:4.5rem 0 3rem;text-align:center}
.hero h1{font-family:'Syne',sans-serif;font-size:clamp(2.2rem,6vw,3.6rem);line-height:1.08;letter-spacing:-1.5px;max-width:18ch;margin:0 auto 1.1rem}
.hero p{color:var(--muted);font-size:1.15rem;max-width:56ch;margin:0 auto 2rem}
.cta{display:flex;gap:.8rem;justify-content:center;flex-wrap:wrap}
.note{color:var(--muted);font-size:.88rem;margin-top:1rem}

/* Pasos */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.25rem;list-style:none;counter-reset:s}
.steps li{counter-increment:s;background:var(--card);border:1px solid var(--border);border-radius:1.1rem;padding:1.5rem}
.steps li::before{content:counter(s);display:inline-grid;place-items:center;width:2rem;height:2rem;border-radius:50%;background:rgba(99,102,241,.2);color:#A5B4FC;font-weight:700;margin-bottom:.8rem}
.steps h3{font-size:1.1rem;margin-bottom:.3rem}
.steps p{color:var(--muted);font-size:.95rem}

/* Planes */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:1.75rem;align-items:stretch}
.card{background:var(--card);border:1px solid var(--border);border-radius:1.25rem;padding:2.2rem 1.8rem;display:flex;flex-direction:column;justify-content:space-between;position:relative}
.card.featured{border:2px solid var(--primary);background:linear-gradient(180deg,rgba(99,102,241,.1),var(--card))}
.badge{position:absolute;top:-14px;right:22px;background:linear-gradient(135deg,#6366F1,#A855F7);font-size:.75rem;font-weight:700;padding:.35rem .9rem;border-radius:1rem;box-shadow:0 4px 12px rgba(99,102,241,.4)}
.plan{font-size:1.5rem;font-weight:700;margin-bottom:.4rem}
.desc{color:var(--muted);font-size:.92rem;margin-bottom:1.4rem;min-height:2.8em}
.price-box{padding-bottom:1.3rem;margin-bottom:1.5rem;border-bottom:1px solid var(--border)}
.price{font-size:2.7rem;font-weight:800;letter-spacing:-1px}
.cur{font-size:1.3rem;font-weight:700;color:var(--primary);margin-right:2px}
.per{color:var(--muted);font-size:.9rem}
.usd{color:var(--accent);font-size:.88rem;font-weight:600;margin-top:.2rem}
.feat{list-style:none;margin-bottom:2rem}
.feat li{display:flex;gap:.7rem;margin-bottom:.8rem;color:#CBD5E1;font-size:.95rem}
.feat li::before{content:"✓";color:var(--accent);font-weight:800;flex:none}
.card .btn{display:block}

/* Materias */
.pills{display:flex;flex-wrap:wrap;gap:.6rem}
.pill{background:rgba(255,255,255,.05);border:1px solid var(--border);padding:.45rem 1rem;border-radius:2rem;font-size:.9rem;color:#E2E8F0}

/* Tutores */
.tutors{background:var(--card);border:1px solid var(--border);border-radius:1.25rem;padding:2.2rem 1.8rem;display:flex;gap:1.5rem;align-items:center;justify-content:space-between;flex-wrap:wrap}
.tutors div{max-width:58ch}
.tutors h2{font-size:1.4rem}
.tutors p{color:var(--muted)}

/* Preguntas */
details{background:var(--card);border:1px solid var(--border);border-radius:.9rem;margin-bottom:.8rem}
summary{cursor:pointer;padding:1.1rem 1.3rem;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:1rem}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:#A5B4FC;font-size:1.3rem;line-height:1}
details[open] summary::after{content:"–"}
details p{padding:0 1.3rem 1.2rem;color:var(--muted);max-width:68ch}

footer{border-top:1px solid var(--border);padding:2rem 0;text-align:center;color:var(--muted);font-size:.88rem}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

.nav{display:flex;gap:1.4rem;align-items:center}
.nav a.l{color:var(--muted);text-decoration:none;font-size:.92rem;font-weight:500}
.nav a.l:hover,.nav a.l[aria-current]{color:var(--text)}
.bar .nav{margin-left:auto;margin-right:1.4rem}
@media (max-width:720px){
  .bar{position:static}
  .bar .wrap{height:auto;flex-wrap:wrap;padding-top:.7rem;padding-bottom:.6rem;row-gap:.5rem}
  .bar .logo{order:1}
  .bar .wrap>.btn{order:2;margin-left:auto}
  .bar .nav{order:3;flex-basis:100%;margin:0;gap:1.3rem;border-top:1px solid var(--border);padding-top:.55rem}
}
.logo{text-decoration:none}
.page{padding:3rem 0 4rem}
.page h1{font-family:'Syne',sans-serif;font-size:clamp(1.9rem,5vw,2.8rem);letter-spacing:-1px;margin-bottom:.6rem}
.page h2{font-size:1.25rem;margin:2.2rem 0 .6rem}
.page p,.page li{color:#CBD5E1;max-width:70ch;margin-bottom:.8rem}
.page ul{padding-left:1.3rem;margin-bottom:.8rem}
.page .updated{color:var(--muted);font-size:.88rem}
.page a{color:#A5B4FC}
.box{background:var(--card);border:1px solid var(--border);border-radius:1rem;padding:1.4rem 1.5rem;margin:1.2rem 0}
.box p:last-child{margin-bottom:0}
.links{display:flex;gap:1.2rem;justify-content:center;flex-wrap:wrap;margin-bottom:.8rem}
.links a{color:var(--muted);text-decoration:none}
.links a:hover{color:var(--text)}
.more{text-align:center;margin-top:1.5rem}
.more a{color:#A5B4FC}

.feat.has-no{margin-bottom:1.1rem}
.noinc{color:var(--muted);font-size:.82rem;font-weight:600;margin-bottom:.6rem}
.feat.no li{color:var(--muted)}
.feat.no li::before{content:"✕";color:#64748B}

[hidden]{display:none!important}
.tpanel{flex-basis:100%;border-top:1px solid var(--border);padding-top:1.4rem}
.tpanel h3{font-size:1.1rem;margin-bottom:.2rem}
.tpanel .hint{color:var(--muted);font-size:.9rem;margin-bottom:1rem}
.tpanel .pills{margin-bottom:1.2rem}
.opt{position:relative;cursor:pointer}
.opt input{position:absolute;opacity:0;inset:0;cursor:pointer}
.opt span{display:inline-block;background:rgba(255,255,255,.05);border:1px solid var(--border);padding:.5rem 1rem;border-radius:2rem;font-size:.9rem;color:#E2E8F0;transition:background .2s,border-color .2s}
.opt input:checked+span{background:rgba(99,102,241,.25);border-color:var(--primary);color:var(--text)}
.opt input:focus-visible+span{outline:3px solid #A5B4FC;outline-offset:3px}
.tutors p a{color:#A5B4FC}
details .ans{padding:0 1.3rem 1.2rem;color:var(--muted)}
details .ans p{padding:0;margin-bottom:.6rem}
details .ans ul{padding-left:1.2rem;margin-bottom:.8rem}
details .ans li{margin-bottom:.3rem;color:var(--muted)}