:root{
  --ink:#0b1020; --text:#334155; --muted:#64748b; --soft:#94a3b8; --line:#e2e8f0;
  --bg:#ffffff; --band:#f8fafc; --green:#16a34a; --warn:#c2410c;
  --sans:'Inter',system-ui,sans-serif; --serif:'Instrument Serif',Georgia,serif; --mono:'JetBrains Mono',ui-monospace,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--text);background:var(--bg);font-weight:300;line-height:1.6;padding-left:72px}
a{color:inherit}
h1,h2,h3{font-family:var(--sans);color:var(--ink);font-weight:400;letter-spacing:-.02em;line-height:1.05}
h1{font-size:clamp(3.2rem,8vw,6.5rem)}
h2{font-size:clamp(2.2rem,4.5vw,3.4rem);margin-bottom:1.5rem}
h3{font-size:1.35rem;line-height:1.25;margin-bottom:.6rem}
em{font-family:var(--serif);font-style:italic;color:var(--soft);font-weight:400}
.dot{color:var(--green)}
.mono{font-family:var(--mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);display:block}
.green{color:var(--green)} .warn{color:var(--warn)}
.center{text-align:center}
.serif-note{font-family:var(--serif);font-size:1.2rem;color:var(--muted);line-height:1.5}
.narrow{max-width:560px;margin:0 auto 2.5rem}

/* rail */
.rail{position:fixed;inset:0 auto 0 0;width:72px;border-right:1px solid var(--line);background:#fff;display:flex;flex-direction:column;align-items:center;padding:24px 0;z-index:10}
.rail-logo{font-family:var(--serif);font-style:italic;font-size:1.4rem;color:var(--ink);text-decoration:none}
.rail ul{list-style:none;margin-top:60px;display:flex;flex-direction:column;gap:34px}
.rail li a{writing-mode:vertical-rl;transform:rotate(180deg);font-family:var(--mono);font-size:.6rem;letter-spacing:.2em;text-transform:uppercase;color:var(--soft);text-decoration:none}
.rail li a:hover{color:var(--ink)}

/* layout */
section{padding:110px 6vw}
.wrap{max-width:1080px;margin:0 auto}
.wrap-wide{max-width:1400px;margin:0 auto}
.narrow-wrap{max-width:760px}
.band{background:var(--band);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.split-head{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;margin-bottom:48px;flex-wrap:wrap}
.split-head h2{margin:0}
.split-head .serif-note{max-width:400px}

/* buttons */
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:500 .85rem var(--sans);padding:13px 20px;border:1px solid var(--ink);text-decoration:none;cursor:pointer;transition:.2s}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#1e293b}
.btn-line{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-line:hover{border-color:var(--ink)}
.full{width:100%;justify-content:space-between}

/* hero */
.hero{min-height:92vh;display:flex;flex-direction:column;justify-content:center;position:relative;padding-top:80px}
.eyebrow{font-family:var(--mono);font-size:.68rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:28px}
.hero h1 em{color:var(--soft)}
.lead{font-family:var(--serif);font-size:1.45rem;max-width:520px;margin-top:32px;color:var(--muted);line-height:1.5}
.lead strong{color:var(--ink);font-weight:400}
.lead u{text-decoration-color:var(--soft);text-underline-offset:5px}
.stat{margin-top:70px;padding-top:24px;border-top:1px solid var(--line);max-width:420px}
.stat strong{display:block;font-size:2rem;font-weight:400;color:var(--ink);margin:4px 0}
.stat span:last-child{font-size:.85rem;color:var(--muted)}

/* caminos */
.tabs{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line)}
.tab{text-align:left;padding:28px;background:#fff;border:0;cursor:pointer;font:inherit;color:var(--muted);display:flex;flex-direction:column;gap:8px}
.tab strong{font-size:1.25rem;font-weight:400;color:var(--ink)}
.tab span:last-child{font-size:.85rem}
.tab.active{background:var(--ink)}
.tab.active strong{color:#fff}
.tab.active .mono{color:var(--green)}
.tab.active span:last-child{color:var(--soft)}
.track{display:grid;grid-template-columns:1.2fr 1fr;gap:40px;padding:40px;margin-top:32px;background:var(--band);border:1px solid var(--line)}
.track[hidden]{display:none}
.tag{display:inline-block;font-family:var(--mono);font-size:.62rem;letter-spacing:.14em;text-transform:uppercase;color:var(--green);border:1px solid #bbf7d0;background:#f0fdf4;padding:4px 10px;margin-bottom:18px}
.track h3{font-size:1.9rem}
.box{background:#fff;border:1px solid var(--line);padding:26px}
.x{list-style:none;margin-top:14px;display:flex;flex-direction:column;gap:12px;font-size:.9rem}
.x li{padding-left:22px;position:relative}
.x li::before{content:"✕";position:absolute;left:0;color:var(--warn);font-size:.75rem;top:2px}

/* programas */
.filters{display:flex;border:1px solid var(--line);background:#fff;padding:4px;gap:4px}
.filter{font-family:var(--mono);font-size:.68rem;padding:8px 12px;border:0;background:none;cursor:pointer;color:var(--muted)}
.filter.active{background:var(--band);color:var(--ink);font-weight:500}
.cards{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);background:#fff}
.card{padding:30px 26px;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:14px}
.card:last-child{border-right:0}
.card[hidden]{display:none}
.card .mono{display:flex;justify-content:space-between;gap:8px}
.pill{border:1px solid var(--line);padding:2px 8px;font-size:.58rem;color:var(--ink)}
.meta{font-family:var(--mono);font-size:.72rem;color:var(--green)}
.who{font-size:.9rem;flex:1}
.who .mono{margin-bottom:6px}
.price{font-family:var(--mono);font-size:.75rem;color:var(--ink);border-top:1px solid var(--line);padding-top:14px}

/* quiz */
.quiz{max-width:620px;margin:0 auto;text-align:left;background:#fff;border:1px solid var(--line);padding:34px;box-shadow:0 1px 2px rgba(0,0,0,.03)}
.quiz-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}
.bars{display:flex;gap:4px}
.bars i{width:22px;height:3px;background:var(--line)}
.bars i.on{background:var(--green)}
.quiz h3{font-size:1.6rem;margin-bottom:22px}
.options{display:flex;flex-direction:column;gap:10px}
.opt{text-align:left;font:inherit;background:#fff;border:1px solid var(--line);padding:16px 18px;cursor:pointer;display:flex;flex-direction:column;gap:4px;transition:.2s}
.opt:hover{border-color:var(--ink)}
.opt strong{font-weight:400;color:var(--ink)}
.opt span{font-size:.8rem;color:var(--muted)}
.quiz-foot{text-align:right;margin-top:22px}
.result h3{margin-bottom:10px}
.result p{margin-bottom:8px}

/* enfoque */
.enfoque{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;background:var(--band);border-top:1px solid var(--line)}
.enfoque blockquote{font-family:var(--serif);font-size:1.7rem;line-height:1.4;color:var(--ink)}

/* sobre */
.about{display:grid;grid-template-columns:1fr 1fr;padding:0;border-top:1px solid var(--line)}
.about-text{padding:110px 6vw}
.about-text p{margin-bottom:18px;max-width:480px;font-family:var(--serif);font-size:1.15rem;color:var(--muted)}
.about-text strong{color:var(--ink);font-weight:400}
.creds{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:36px;padding-top:24px;border-top:1px solid var(--line)}
.creds dt{font-family:var(--mono);font-size:.6rem;letter-spacing:.14em;text-transform:uppercase;color:var(--soft)}
.creds dd{font-family:var(--mono);font-size:.78rem;color:var(--ink)}
.creds a{color:var(--green);text-decoration:none}
.about-img{background:linear-gradient(180deg,rgba(15,23,42,.05),rgba(15,23,42,.75)),url('flores.jpg') center/cover,#475569;min-height:560px;display:flex;align-items:flex-end;padding:48px}
.about-img .quote{font-family:var(--serif);font-style:italic;font-size:1.45rem;color:#fff;line-height:1.4;max-width:420px;margin:10px 0 22px}
.sign{display:flex;align-items:center;gap:14px;color:#e2e8f0;font-family:var(--mono);font-size:.72rem}
.avatar{width:72px;height:72px;border-radius:50%;border:2px solid #fff;background:#cbd5e1;color:var(--ink);display:grid;place-items:center;font-family:var(--serif);font-size:1.4rem;overflow:hidden;position:relative;flex-shrink:0}
.avatar img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;filter:grayscale(1)}

/* faq */
.faq{margin-top:20px;border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line);padding:20px 0}
.faq summary{cursor:pointer;color:var(--ink);font-weight:400;list-style:none;display:flex;gap:14px;align-items:baseline}
.faq summary::-webkit-details-marker{display:none}
.faq summary .mono{display:inline}
.faq summary::after{content:"+";margin-left:auto;color:var(--soft)}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:12px 0 0 36px;font-family:var(--serif);font-size:1.08rem;color:var(--muted)}

/* form */
.big{font-size:clamp(3rem,7vw,5rem)}
.form{max-width:640px;margin:0 auto;text-align:left;background:#fff;border:1px solid var(--line);padding:34px;display:flex;flex-direction:column;gap:18px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form label{font-family:var(--mono);font-size:.62rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);display:flex;flex-direction:column;gap:8px}
.form input,.form select,.form textarea{font:300 .9rem var(--sans);color:var(--ink);border:1px solid var(--line);padding:12px;background:#fff;text-transform:none;letter-spacing:0}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--ink)}
.form small{text-transform:none;letter-spacing:0;font-family:var(--sans);font-size:.72rem;color:var(--soft)}
.form-foot{display:flex;justify-content:space-between;align-items:center;gap:16px;border-top:1px solid var(--line);padding-top:18px;font-size:.75rem;color:var(--muted)}
.diag-note{font-size:.8rem;background:#f0fdf4;border:1px solid #bbf7d0;padding:10px 12px;color:#166534}
.form-msg{font-size:.85rem;color:var(--ink)}

/* footer */
.foot{padding:60px 6vw;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:flex-end;gap:30px;flex-wrap:wrap;font-size:.85rem;color:var(--muted)}
.foot-logo{font-size:3.5rem;color:var(--ink);letter-spacing:-.04em}
.foot-links{display:flex;gap:24px;font-family:var(--mono);font-size:.7rem;text-transform:uppercase;letter-spacing:.12em}
.foot-links a{text-decoration:none}
.small{font-size:.6rem}

/* responsive */
@media (max-width:1000px){
  .cards{grid-template-columns:1fr 1fr}
  .card:nth-child(2){border-right:0}
  .card{border-bottom:1px solid var(--line)}
}
@media (max-width:760px){
  body{padding-left:0}
  .rail{display:none}
  section{padding:72px 16px}
  .tabs,.track,.enfoque,.about,.row,.cards{grid-template-columns:1fr}
  .track{padding:24px}
  .card{border-right:0}
  .about-text{padding:72px 16px}
  .about-img{min-height:420px;padding:28px}
  .quiz,.form{padding:22px}
  .form-foot{flex-direction:column;align-items:stretch}
  .filters{width:100%;overflow-x:auto}
}

/* v2: fondo hero, CTA mail, ajustes */
.hero{overflow:hidden}
.hero > *:not(.hero-bg){position:relative;z-index:1}
.hero-bg{position:absolute;top:0;right:0;width:48%;height:100%;background:url('hoja.jpg') center/cover no-repeat;opacity:.09;pointer-events:none;
  -webkit-mask-image:linear-gradient(to left,#000 55%,transparent);mask-image:linear-gradient(to left,#000 55%,transparent)}
.card .pill{align-self:flex-start;font-family:var(--mono);font-size:.58rem;letter-spacing:.12em;text-transform:uppercase;margin-top:-6px}
.cta{display:flex;flex-direction:column;align-items:center;gap:18px;margin-top:8px}
.btn-big{font-size:1rem;padding:18px 28px;max-width:100%;text-align:center;word-break:break-word}
.cta-note{max-width:460px;font-size:.85rem;color:var(--muted)}
@media (max-width:760px){
  .hero-bg{width:100%;opacity:.06}
  .hero{min-height:auto;padding-top:64px}
  .btn-big{font-size:.85rem;padding:16px 18px;width:100%}
  .split-head{flex-direction:column;align-items:flex-start;gap:20px}
  .filters{flex-wrap:nowrap}
  .enfoque blockquote{font-size:1.35rem}
  .creds{grid-template-columns:1fr}
}
.about-img .green{color:#86efac}