:root{
  --bg:#080d0e;--bg-2:#0d1416;--bg-3:#121b1d;--surface:#0f1719;
  --line:rgba(79,183,179,.16);--line-2:rgba(255,255,255,.07);
  --ink:#f3f7f7;--muted:#9fb3b3;--muted-2:#6c7f7f;
  --accent:#4fb7b3;--accent-2:#8ed9d6;--accent-ink:#06201f;
  --r:18px;--maxw:1120px;
  --glow:0 0 0 1px rgba(79,183,179,.25),0 18px 60px -18px rgba(79,183,179,.45);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:var(--bg);color:var(--ink);font-family:Poppins,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;line-height:1.55;overflow-x:hidden}
body::before{content:"";position:fixed;inset:0;pointer-events:none;z-index:-1;
  background:radial-gradient(70% 45% at 50% 100%,rgba(79,183,179,.22),transparent 70%),radial-gradient(60% 30% at 50% 0%,rgba(79,183,179,.08),transparent 70%)}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
.hl{color:var(--accent)}
.wrap{max-width:640px;margin:0 auto;padding:0 22px}
section{padding:56px 0;scroll-margin-top:40px}

/* NAV */
.nav{position:sticky;top:0;z-index:40;background:rgba(8,13,14,.78);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line-2)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:56px;max-width:var(--maxw)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.06em;font-size:15px}
.brand img{filter:drop-shadow(0 0 8px rgba(88,205,240,.55))}
.brand img{width:30px;height:30px}
.pill{border:1px solid var(--line-2);border-radius:999px;padding:8px 16px;font-size:12.5px;font-weight:600;background:rgba(255,255,255,.03)}

/* BOTONES */
.btn{display:flex;align-items:center;justify-content:center;gap:12px;width:100%;padding:19px 24px;border-radius:999px;border:0;cursor:pointer;
  background:var(--accent);color:var(--accent-ink);font:800 15px/1 Poppins,sans-serif;letter-spacing:.02em;text-transform:uppercase;box-shadow:var(--glow);transition:transform .15s,filter .15s}
.btn:hover{transform:translateY(-1px);filter:brightness(1.08)}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
.btn-ghost{background:rgba(255,255,255,.02);color:var(--ink);border:1px solid var(--line-2);box-shadow:none}

/* HERO */
.hero{text-align:center;padding-top:34px}
.hero h1{font-size:clamp(30px,8.4vw,52px);line-height:1.12;font-weight:800;letter-spacing:-.02em}
.hero .sub{color:var(--muted);font-size:16.5px;margin:18px auto 26px;max-width:460px}
.video{display:block;position:relative;border-radius:var(--r);overflow:hidden;border:1px solid var(--line);aspect-ratio:16/9;margin-bottom:26px;cursor:pointer;background:var(--bg-3)}
.video img{width:100%;height:100%;object-fit:cover;filter:brightness(.72)}
.play{position:absolute;inset:0;margin:auto;width:72px;height:72px;border-radius:50%;background:var(--accent);display:grid;place-items:center;box-shadow:0 0 0 12px rgba(79,183,179,.18)}
.play::after{content:"";border-left:20px solid var(--accent-ink);border-top:12px solid transparent;border-bottom:12px solid transparent;margin-left:5px}

/* HISTORIA */
h2{font-size:clamp(26px,7vw,40px);line-height:1.15;font-weight:800;letter-spacing:-.02em;text-align:center}
.lead{color:var(--muted);text-align:center;margin-top:14px;font-size:16.5px}
.story p{color:var(--muted);font-size:16.5px;text-align:center;margin-top:16px}
.story p b{color:var(--ink)}
.ba{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:30px 0}
.ba figure{position:relative;border-radius:var(--r);overflow:hidden;border:1px solid var(--line);aspect-ratio:9/14}
.ba img{width:100%;height:100%;object-fit:cover}
.ba figcaption{position:absolute;left:12px;bottom:12px;padding:7px 14px;border-radius:999px;background:rgba(8,13,14,.8);font-size:12px;font-weight:700;letter-spacing:.14em}
.ba figure:last-child figcaption{color:var(--accent-2)}

/* PROGRESIÓN (estilo Carlos) */
.timeline{display:grid;gap:12px;margin-top:30px}
.month{background:linear-gradient(180deg,var(--bg-3),var(--surface));border:1px solid var(--line);border-radius:var(--r);padding:24px;text-align:center}
.month .tag{font-size:12px;font-weight:700;letter-spacing:.22em;color:var(--accent)}
.month .num{font-size:clamp(24px,7vw,32px);line-height:1.2;font-weight:800;margin:6px 0 2px}
.month p{color:var(--muted);font-size:14.5px}
.month.now{box-shadow:var(--glow);border-color:rgba(79,183,179,.45)}
.quote{color:var(--muted);font-style:italic;text-align:center;margin-top:24px;font-size:15.5px}
.quote b{color:var(--ink);font-style:normal}

/* PRUEBA */
.proof{background:linear-gradient(180deg,var(--bg-3),var(--surface));border:1px solid var(--line);border-radius:24px;padding:22px;margin-top:22px;text-align:center}
.proof img{border-radius:14px;margin:0 auto}
.proof .big{font-size:clamp(40px,12vw,56px);font-weight:800;color:var(--accent);margin-top:20px;line-height:1}
.proof .what{font-weight:600;font-size:18px;margin-top:8px}
.proof .src{color:var(--muted-2);font-size:13.5px;margin-top:8px}

/* COMPARATIVA */
.vs{display:grid;gap:12px;margin-top:28px}
.vs .card{border-radius:var(--r);padding:22px;border:1px solid var(--line-2);background:var(--surface)}
.vs .card.good{border-color:rgba(79,183,179,.45);box-shadow:var(--glow)}
.vs h3{font-size:15px;letter-spacing:.12em;text-transform:uppercase;margin-bottom:12px}
.vs li{list-style:none;color:var(--muted);padding:6px 0 6px 28px;position:relative}
.vs .bad li::before{content:"✕";position:absolute;left:4px;color:#e57373}
.vs .good li::before{content:"✓";position:absolute;left:4px;color:var(--accent)}

/* ALUMNOS */
.students{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:28px}
.student{border-radius:var(--r);overflow:hidden;border:1px solid var(--line);background:var(--surface)}
.student .media{aspect-ratio:3/4;background:var(--bg-3) center/cover}
.student .info{padding:14px}
.student .res{font-weight:700;font-size:15px;line-height:1.3}
.student .name{color:var(--muted);font-size:13px;margin-top:6px}

/* FORMULARIO POR PASOS */
.form-card{background:linear-gradient(180deg,var(--bg-3),var(--surface));border:1px solid var(--line);border-radius:24px;padding:28px 22px;margin-top:28px;position:relative;overflow:hidden}
.bar{position:absolute;top:0;left:0;height:4px;background:var(--accent);transition:width .35s}
.count{font-size:12px;font-weight:700;letter-spacing:.2em;color:var(--muted-2)}
.step{display:none}.step.on{display:block;animation:in .3s ease}
@keyframes in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.step h3{font-size:22px;font-weight:800;margin-top:10px;line-height:1.25}
.step .hint{color:var(--muted);font-size:14.5px;margin:4px 0 18px}
.field{width:100%;background:transparent;border:0;border-bottom:1px solid var(--line-2);color:var(--ink);font:400 18px Poppins,sans-serif;padding:12px 2px;outline:none}
.field:focus{border-color:var(--accent)}
.phone{display:flex;gap:10px}
.phone select{background:var(--bg-2);color:var(--ink);border:1px solid var(--line-2);border-radius:12px;padding:0 10px;font:500 15px Poppins,sans-serif}
.opts{display:grid;gap:10px}
.opt{text-align:left;padding:15px 16px;border-radius:14px;border:1px solid var(--line-2);background:rgba(255,255,255,.02);color:var(--ink);font:500 15px Poppins,sans-serif;cursor:pointer;transition:.15s}
.opt:hover{border-color:var(--line)}
.opt.sel{border-color:var(--accent);background:rgba(79,183,179,.1)}
.consent{display:flex;gap:10px;align-items:flex-start;margin-top:18px;color:var(--muted);font-size:12.5px;line-height:1.45}
.consent input{margin-top:3px;accent-color:var(--accent);width:16px;height:16px;flex:none}
.consent a{color:var(--accent-2);text-decoration:underline}
.actions{display:flex;align-items:center;justify-content:space-between;margin-top:24px;gap:12px}
.back{background:none;border:0;color:var(--muted-2);font:500 14px Poppins,sans-serif;cursor:pointer}
.actions .btn{width:auto;padding:16px 28px;font-size:14px}
.err{color:#ef9a9a;font-size:13px;margin-top:10px;min-height:18px}

/* FINAL */
.final{text-align:center}
.faq{margin-top:26px;display:grid;gap:10px}
.faq details{background:var(--surface);border:1px solid var(--line-2);border-radius:16px;padding:18px 20px}
.faq summary{list-style:none;cursor:pointer;font-weight:600;display:flex;justify-content:space-between;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";flex:none;width:26px;height:26px;border-radius:50%;border:1.5px solid var(--accent);color:var(--accent);display:grid;place-items:center;font-weight:500;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{color:var(--muted);margin-top:12px;font-size:15px}
footer{padding:40px 0 120px;text-align:center;color:var(--muted-2);font-size:13px}
footer a{margin:0 6px}
footer .disc{max-width:520px;margin:14px auto 0;font-size:11.5px;line-height:1.5}

/* BARRA FIJA MÓVIL */
.sticky{position:fixed;left:0;right:0;bottom:0;z-index:50;padding:12px 18px calc(12px + env(safe-area-inset-bottom));background:rgba(8,13,14,.92);backdrop-filter:blur(12px);border-top:1px solid var(--line-2);display:flex;align-items:center;justify-content:space-between;gap:12px;transform:translateY(110%);transition:transform .3s}
.sticky.show{transform:none}
.sticky span{font-weight:700;font-size:15px;line-height:1.25}
.sticky .btn{width:auto;padding:14px 22px;font-size:13px}

/* ÉXITO */
.success{display:none;padding:40px 0 80px;text-align:center}
.success.on{display:block}
.success .yt{aspect-ratio:16/9;border-radius:var(--r);overflow:hidden;border:1px solid var(--line);margin:24px 0}
.success .yt iframe{width:100%;height:100%;border:0}
.calendly-inline-widget{border-radius:var(--r);overflow:hidden;margin-top:18px}

/* REVEAL */
.rv{opacity:0;transform:translateY(16px);transition:opacity .6s,transform .6s}
.rv.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.rv{opacity:1;transform:none}html{scroll-behavior:auto}}

/* BIO /insta */
.bio{text-align:center;padding:40px 0 60px}
.bio .logo{width:52px;margin:0 auto 26px;filter:drop-shadow(0 0 12px rgba(88,205,240,.6))}
.avatar{width:150px;height:150px;border-radius:50%;margin:0 auto;padding:5px;background:linear-gradient(var(--bg),var(--bg)) padding-box,linear-gradient(140deg,var(--accent),rgba(79,183,179,.15)) border-box;border:3px solid transparent;box-shadow:0 0 50px -10px rgba(79,183,179,.5)}
.avatar img{width:100%;height:100%;border-radius:50%;object-fit:cover}
.bio h1{font-size:28px;font-weight:800;margin-top:22px}
.bio .handle{color:var(--accent);font-weight:600;font-size:15px}
.bio .desc{color:var(--muted);font-size:16.5px;margin:16px auto 26px;max-width:380px}
.bio .desc b{color:var(--ink)}
.bio .btn{margin-bottom:12px}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:28px 0 40px}
.stats b{display:block;font-size:24px;font-weight:800;color:var(--accent)}
.stats span{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted-2);line-height:1.35;display:block}
.eyebrow{font-size:13px;font-weight:700;letter-spacing:.2em;color:var(--muted-2);text-transform:uppercase}

/* Barra de lectura, etiquetas y confianza (estilo Carlos) */
.nav{position:sticky}
.progress{position:absolute;left:0;bottom:-1px;height:2px;width:0;background:var(--accent);box-shadow:0 0 12px var(--accent);transition:width .1s linear}
.kicker{display:table;margin:0 auto 16px;padding:7px 16px;border-radius:999px;border:1px solid rgba(79,183,179,.35);background:rgba(79,183,179,.08);color:var(--accent);font-size:12px;font-weight:700;letter-spacing:.18em;text-transform:uppercase}
.trust{color:var(--muted-2);font-size:13px;margin-top:14px;text-align:center}

/* Trabajar conmigo */
.perks{display:grid;gap:12px;margin-top:28px}
.perk{display:flex;gap:16px;align-items:flex-start;background:linear-gradient(180deg,var(--bg-3),var(--surface));border:1px solid var(--line);border-radius:var(--r);padding:20px}
.perk .ico{flex:none;width:46px;height:46px;border-radius:14px;display:grid;place-items:center;font-size:22px;background:rgba(79,183,179,.1);border:1px solid rgba(79,183,179,.3)}
.perk h3{font-size:16.5px;font-weight:700;margin-bottom:4px}
.perk p{color:var(--muted);font-size:14.5px;line-height:1.5}
@media (min-width:720px){.perks{grid-template-columns:1fr 1fr}.work .wrap{max-width:820px}}