:root{
  --teal:#0e4b4f; --teal-2:#13666b; --ink:#16232b; --muted:#56656b;
  --hl:#ffd43b; --coral:#ef6f53; --paper:#fffdf6; --grid:#e9eef0;
  --card:#fff; --line:#dfe6e8; --r:14px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;font-family:"Atkinson Hyperlegible",system-ui,sans-serif;font-size:18px;line-height:1.6;color:var(--ink);background:var(--paper);padding-bottom:64px}
@media (min-width:821px){body{padding-bottom:0}}
a{color:var(--teal-2)}
h1,h2,h3{font-family:"Bricolage Grotesque",system-ui,sans-serif;line-height:1.1;margin:0 0 .5em;color:var(--ink);letter-spacing:-.01em}
h1{font-size:clamp(2.1rem,5.2vw,3.6rem);font-weight:800}
h2{font-size:clamp(1.6rem,3.4vw,2.4rem);font-weight:800}
h3{font-size:1.2rem;font-weight:600}
.wrap{max-width:1100px;margin:0 auto;padding:0 20px}
.narrow{max-width:760px}
.center{text-align:center}
.skip{position:absolute;left:-999px}.skip:focus{left:10px;top:10px;background:#fff;padding:8px;z-index:99}

/* papel cuadriculado */
.hero,.sec-paper{background-color:var(--paper);background-image:linear-gradient(var(--grid) 1px,transparent 1px),linear-gradient(90deg,var(--grid) 1px,transparent 1px);background-size:28px 28px}

/* header */
.top{position:sticky;top:0;z-index:40;background:rgba(255,253,246,.94);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;gap:20px;min-height:66px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-family:"Bricolage Grotesque",sans-serif;font-weight:800;line-height:1.05;font-size:1.05rem}
.brand small{display:block;font-weight:600;font-size:.78rem;color:var(--muted)}
.logo{width:40px;height:40px;flex:none}
.nav{display:flex;gap:4px;margin-left:auto}
.nav a{text-decoration:none;color:var(--ink);padding:8px 10px;border-radius:8px;font-size:.95rem}
.nav a:hover{background:var(--grid)}
.top-tem,.nav-toggle,.nav-btn,.nav-res{display:none}
@media (max-width:980px){
  .top-in{gap:10px;position:relative}
  .top-tem{display:inline-block;margin-left:auto;font-weight:700;text-decoration:none;color:var(--teal);border:2px solid var(--teal);border-radius:10px;padding:6px 12px;font-size:.92rem}
  .nav-btn{display:flex;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;cursor:pointer;border-radius:10px;align-items:center}
  .nav-btn span{width:22px;height:2.5px;background:var(--ink);border-radius:2px;transition:.2s}
  .nav-toggle:checked + .nav-btn span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
  .nav-toggle:checked + .nav-btn span:nth-child(2){opacity:0}
  .nav-toggle:checked + .nav-btn span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}
  .nav{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:0;margin:0;background:var(--paper);border-bottom:1px solid var(--line);box-shadow:0 10px 20px rgba(0,0,0,.08);padding:6px 20px 14px}
  .nav-toggle:checked ~ .nav{display:flex}
  .nav a{padding:12px 4px;border-bottom:1px solid var(--line);border-radius:0;font-size:1.02rem}
  .nav a.nav-res{display:block;border:0;margin-top:10px;background:var(--coral);color:#fff;text-align:center;border-radius:12px;font-weight:700}
  .top .top-cta{display:none}
}
@media (max-width:380px){.brand small{display:none}.top-tem{padding:5px 9px}}

/* botones */
.btn{display:inline-block;background:var(--coral);color:#fff;font-weight:700;text-decoration:none;padding:14px 24px;border-radius:12px;box-shadow:0 3px 0 #c9513a;transition:transform .1s}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:translateY(2px);box-shadow:0 1px 0 #c9513a}
.btn-sm{padding:9px 16px;font-size:.95rem}
.btn-block{display:block;text-align:center}
.btn-light{background:var(--hl);color:var(--ink);box-shadow:0 3px 0 #d9b21f}
.btn-outline{background:transparent;color:#fff;border:2px solid #fff;box-shadow:none}
.link-arrow{font-weight:700;text-decoration:none;color:var(--teal-2)}
.link-arrow:hover{text-decoration:underline}

/* hero */
.hero{padding:70px 0 64px;border-bottom:1px solid var(--line)}
.hero-txt{max-width:820px}
.pill{display:inline-block;background:#fff;border:1.5px solid var(--teal);color:var(--teal);border-radius:999px;padding:6px 14px;font-size:.9rem;margin:0 0 20px}
.hl{background:linear-gradient(transparent 55%,var(--hl) 55%);padding:0 .1em}
.under{color:var(--coral);text-decoration:underline;text-decoration-thickness:.12em;text-underline-offset:.12em}
.lead{font-size:1.2rem;color:var(--muted);max-width:680px}
.actions{display:flex;gap:20px;align-items:center;flex-wrap:wrap;margin:26px 0}
.actions-center{justify-content:center}
.trust{list-style:none;display:flex;flex-wrap:wrap;gap:8px 22px;padding:0;margin:0;color:var(--muted);font-size:.95rem}
.trust li::before{content:"✓ ";color:var(--teal);font-weight:700}

/* secciones */
.sec{padding:72px 0}
.h-center{text-align:center;max-width:780px;margin-left:auto;margin-right:auto}
.kicker{text-transform:uppercase;letter-spacing:.1em;font-size:.8rem;font-weight:700;color:var(--coral);margin:0 0 8px;text-align:inherit}
.sec-paper .kicker,#metodo .kicker{text-align:center}
#sobre-mi .kicker{text-align:left}
.kicker a{color:inherit}

.pains{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:32px}
@media (max-width:900px){.pains{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.pains{grid-template-columns:1fr}}
.pain{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.pain span{font-size:1.6rem}
.pain p{margin:.4em 0 0}
.relief{text-align:center;font-size:1.25rem;max-width:720px;margin:36px auto 0}

.problem{text-align:center;font-size:1.15rem;font-style:italic;max-width:640px;margin:0 auto 28px;background:#fff;border-left:5px solid var(--hl);padding:14px 18px;border-radius:8px}
.compare{display:grid;grid-template-columns:1fr 1.25fr;gap:20px;align-items:stretch}
@media (max-width:820px){.compare{grid-template-columns:1fr}}
.side{background:#fff;border-radius:var(--r);padding:24px;border:1px solid var(--line)}
.side-new{border:2px solid var(--teal);box-shadow:6px 6px 0 var(--teal)}
.side-tag{display:inline-block;font-weight:700;font-size:.85rem;background:var(--grid);padding:4px 12px;border-radius:999px;margin:0 0 14px}
.tag-new{background:var(--teal);color:#fff}
.algebra{font-family:ui-monospace,Menlo,monospace;font-size:1.05rem;background:var(--paper);border-radius:8px;padding:12px 16px}
.algebra p{margin:.3em 0}
.side-note{color:var(--muted);font-size:.98rem;margin-bottom:0}
.side svg{width:100%;height:auto;display:block;margin:6px 0}
.b1{fill:var(--teal)} .b2{fill:#fff;stroke:var(--coral);stroke-width:2;stroke-dasharray:5 4}
.brace{fill:none;stroke:var(--ink);stroke-width:1.6}
.lbl{font:700 14px "Atkinson Hyperlegible",sans-serif;fill:var(--ink)}
.b2+.lbl,.lbl{fill:var(--ink)}
.hand{font:600 19px "Caveat",cursive;fill:var(--coral)}
.hl-text{fill:var(--teal)}

.cpa{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:28px}
@media (max-width:700px){.cpa{grid-template-columns:1fr}}
.cpa div{background:#fff;border-radius:var(--r);padding:18px 20px;border:1px solid var(--line)}
.cpa b,.steps3 b{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--hl);font-family:"Bricolage Grotesque",system-ui,sans-serif;font-weight:800;margin-bottom:8px}
.cpa p{margin:0;color:var(--muted)}

.why{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:32px}
@media (max-width:820px){.why{grid-template-columns:1fr}}
.why article{border-top:4px solid var(--teal);padding-top:16px}
.why article:nth-child(2){border-color:var(--coral)}
.why article:nth-child(3){border-color:var(--hl)}

/* oferta */
.sec-teal{background:var(--teal);color:#e8f2f2}
.sec-teal h2{color:#fff}
.kicker-light{color:var(--hl)}
.hl-dark{color:var(--hl)}
.offer{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center}
@media (max-width:820px){.offer{grid-template-columns:1fr}}
.ticks{list-style:none;padding:0}
.ticks li{padding-left:30px;position:relative;margin:10px 0}
.ticks li::before{content:"✓";position:absolute;left:0;color:var(--hl);font-weight:700}
.ticks strong{color:#fff}
.price-card{background:#fff;color:var(--ink);border-radius:20px;padding:30px;box-shadow:8px 8px 0 var(--hl)}
.price-name{font-weight:700;margin:0;color:var(--teal)}
.price{margin:4px 0 0;font-family:"Bricolage Grotesque",system-ui,sans-serif;font-weight:800;font-size:3.6rem;line-height:1}
.price-sub{color:var(--muted);margin:6px 0 20px}
.price-help{font-size:.88rem;color:var(--muted);margin:14px 0 0}
.steps3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:40px}
@media (max-width:700px){.steps3{grid-template-columns:1fr}}
.steps3 div{background:var(--teal-2);border-radius:var(--r);padding:18px 20px}
.steps3 b{color:var(--ink)}
.steps3 p{margin:0}
.steps3 strong{color:#fff}

.cont{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:28px 0}
@media (max-width:720px){.cont{grid-template-columns:1fr}}
.cont article{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px}
.meta{font-size:.92rem;color:var(--teal);font-weight:700;margin-bottom:0}

.about{display:grid;grid-template-columns:260px 1fr;gap:40px;align-items:center}
@media (max-width:720px){.about{grid-template-columns:1fr}}
.photo{width:100%;max-width:260px;aspect-ratio:1;border-radius:24px;object-fit:cover;box-shadow:8px 8px 0 var(--coral)}
.photo-ph{display:grid;place-items:center;background:var(--teal);color:var(--hl);font:800 6rem "Bricolage Grotesque",system-ui,sans-serif,system-ui,sans-serif}

.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:28px}
@media (max-width:900px){.quotes{grid-template-columns:1fr}}
blockquote{margin:0;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px;position:relative}
blockquote::before{content:"“";position:absolute;top:-18px;left:18px;font:800 4rem/1 "Bricolage Grotesque",system-ui,sans-serif;color:var(--hl)}
blockquote p{margin-top:8px}
blockquote cite{font-style:normal;font-weight:700;color:var(--teal)}

details{background:#fff;border:1px solid var(--line);border-radius:12px;margin:10px 0;padding:0 20px}
summary{cursor:pointer;font-weight:700;padding:16px 0;list-style:none;position:relative;padding-right:30px}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:0;top:12px;font-size:1.5rem;color:var(--coral)}
details[open] summary::after{content:"−"}
details p{margin-top:0}

.final{background:var(--coral);color:#fff;padding:72px 0;text-align:center}
.final h2{color:#fff}
.final p{max-width:620px;margin:0 auto}
.final .btn-light{box-shadow:0 3px 0 #b38f0c}
.mail-plain a{color:#fff}

.posts{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:20px}
@media (max-width:900px){.posts{grid-template-columns:1fr}}
.post{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px}
.post time{font-size:.85rem;color:var(--muted)}
.post h3 a{color:var(--ink);text-decoration:none}
.prose h2{font-size:1.5rem;margin-top:1.6em}
.prose li{margin:.4em 0}
.inline-cta{margin-top:40px;background:#fff;border:2px solid var(--teal);border-radius:var(--r);padding:22px}

.foot{background:var(--ink);color:#b9c6cb;padding:44px 0 18px}
.foot a{color:#fff}
.foot-in{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:28px}
@media (max-width:720px){.foot-in{grid-template-columns:1fr}}
.brand-foot{color:#fff}.brand-foot small{color:#b9c6cb}
.brand-foot .logo rect:first-child,.brand-foot .logo rect:nth-child(2){fill:#5fb3b8}
.foot-h{color:#fff;font-weight:700;text-transform:uppercase;letter-spacing:.08em;font-size:.85rem;margin-bottom:6px}
.legal{border-top:1px solid #2c3a42;margin-top:28px;padding-top:14px;font-size:.88rem}

.sticky-cta{position:fixed;left:12px;right:12px;bottom:12px;z-index:60;background:var(--coral);color:#fff;text-align:center;font-weight:700;text-decoration:none;padding:14px;border-radius:14px;box-shadow:0 6px 20px rgba(0,0,0,.2)}
@media (min-width:821px){.sticky-cta{display:none}}
.price-lead{margin:6px 0 12px;color:var(--muted);font-size:.95rem}
.ptable{width:100%;border-collapse:collapse;margin-bottom:18px}
.ptable td{padding:10px 4px;border-bottom:1px dashed var(--line)}
.ptable td:last-child{text-align:right}
.ptable strong{font-family:"Bricolage Grotesque",system-ui,sans-serif;font-size:1.4rem}
.ptable small{color:var(--muted)}
.ptable .best td{background:#fff7d1}
.ptable .best td:first-child{border-radius:8px 0 0 8px;padding-left:10px}
.ptable .best td:last-child{border-radius:0 8px 8px 0;padding-right:10px}
.small-note{color:var(--muted);font-size:.95rem}
.lead-c{color:var(--muted);max-width:640px}
.howon{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:28px}
@media (max-width:820px){.howon{grid-template-columns:1fr}}
.howon article{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px}
.howon-ic{width:52px;height:52px;border-radius:12px;background:var(--teal);display:grid;place-items:center;margin-bottom:12px}
.howon-ic svg{width:30px;height:30px;fill:none;stroke:#fff;stroke-width:2.4;stroke-linecap:round;stroke-linejoin:round}
.howon article:nth-child(3) .howon-ic{background:var(--coral)}
.howon p{margin:0;color:var(--muted)}
.needs{margin:22px auto 0;max-width:760px;background:#fff;border:2px solid var(--teal);border-radius:var(--r);padding:22px 26px}
.needs-h{font-family:"Bricolage Grotesque",system-ui,sans-serif;font-weight:800;font-size:1.2rem;margin:0 0 8px}
.needs ul{margin:0;padding-left:20px}
.needs li{margin:4px 0}
.needs-note{margin:12px 0 0;color:var(--muted);font-size:.95rem}
.contact-head{padding:56px 0 24px}
.form-sec{padding-top:24px}
.form-frame{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:6px 6px 0 var(--teal)}
.form-frame iframe{display:block;width:100%;height:2350px;border:0}
@media (max-width:640px){.form-frame iframe{height:2750px}}
.form-alt{text-align:center;color:var(--muted);font-size:.95rem;margin-top:18px}
.cursos{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;margin:30px 0 18px}
@media (max-width:900px){.cursos{grid-template-columns:repeat(2,1fr)}}
@media (max-width:480px){.cursos{grid-template-columns:1fr}}
.curso-card{display:flex;flex-direction:column;gap:6px;padding:22px;border-radius:var(--r);text-decoration:none;border:1px solid var(--line);background:#fff}
.curso-card.on{background:var(--teal);border-color:var(--teal);box-shadow:5px 5px 0 var(--hl)}
.curso-card.on:hover{transform:translateY(-2px)}
.curso-n{font-family:"Bricolage Grotesque",system-ui,sans-serif;font-weight:800;font-size:1.5rem;color:var(--ink)}
.curso-card.on .curso-n{color:#fff}
.curso-s{font-size:.92rem;color:var(--muted)}
.curso-card.on .curso-s{color:var(--hl);font-weight:700}
.curso-card.off{opacity:.7}
.temas{display:flex;flex-direction:column;gap:14px}
.tema{display:grid;grid-template-columns:auto 1fr auto;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:18px 20px}
.tema-num{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;background:var(--hl);font-family:"Bricolage Grotesque",system-ui,sans-serif;font-weight:800;font-size:1.2rem}
.tema h3{margin:0 0 4px}
.tema p{margin:0;color:var(--muted);font-size:.97rem}
@media (max-width:640px){.tema{grid-template-columns:auto 1fr}.tema-btn{grid-column:1/-1;text-align:center}}
.wrap.narrow > .kicker{text-align:left}
.form-sel{background:#fff7d1;border:1px solid var(--hl);border-radius:12px;padding:12px 16px;margin:0 0 16px;font-weight:700}
.only-eso{display:inline-block;background:#fff;border-left:4px solid var(--coral);border-radius:8px;padding:8px 14px;margin:14px 0 0;font-size:.95rem;color:var(--ink)}
.only-eso.center{display:block;width:fit-content;margin:12px auto 0}

/* ===== Móvil: menos aire y menos scroll ===== */
@media (max-width:640px){
  body{font-size:16.5px;line-height:1.55}
  h1{font-size:1.95rem}
  h2{font-size:1.45rem;margin-bottom:.4em}
  h3{font-size:1.08rem}
  .sec,.final,.cta{padding:36px 0}
  .hero{padding:24px 0 28px}
  .page-head,.contact-head{padding:28px 0 12px}
  .form-sec{padding-top:8px}
  .pill{margin-bottom:12px;font-size:.82rem}
  .lead{font-size:1.02rem}
  .actions{margin:18px 0;gap:12px}
  .kicker{margin-bottom:4px}
  /* situaciones: tarjetas compactas con icono en línea */
  .pains{gap:10px;margin-top:18px}
  .pain{display:flex;gap:12px;align-items:flex-start;padding:14px 16px}
  .pain span{font-size:1.3rem;line-height:1.4}
  .pain p{margin:0}
  .relief{font-size:1.05rem;margin-top:20px}
  /* método */
  .problem{margin-bottom:16px;padding:10px 14px;font-size:1rem}
  .compare{gap:14px}
  .side{padding:16px}
  .side-tag{margin-bottom:10px}
  .cpa,.steps3,.why,.howon,.cont,.quotes,.posts{gap:10px;margin-top:16px}
  .cpa div,.steps3 div{display:grid;grid-template-columns:auto 1fr;column-gap:12px;align-items:center;padding:12px 14px}
  .cpa b,.steps3 b{margin:0;grid-row:span 2}
  .cpa h3{margin:0}
  .why article{padding-top:10px}
  .why p{margin:.3em 0 0}
  /* oferta */
  .offer{gap:20px}
  .ticks li{margin:6px 0}
  .price-card{padding:20px}
  .price-sub{margin-bottom:12px}
  /* online */
  .howon article{display:grid;grid-template-columns:auto 1fr;column-gap:12px;padding:14px 16px}
  .howon-ic{width:42px;height:42px;margin:0;grid-row:span 2}
  .howon-ic svg{width:24px;height:24px}
  .howon h3{margin:0 0 2px}
  .needs{padding:16px 18px;margin-top:14px}
  .cont article{padding:16px}
  .meta{margin-top:6px}
  /* testimonios y FAQ */
  blockquote{padding:18px 16px 14px}
  blockquote::before{font-size:3rem;top:-14px}
  details{padding:0 14px}
  summary{padding:12px 28px 12px 0}
  /* temarios */
  .cursos{gap:10px;margin:18px 0 12px}
  .curso-card{padding:14px 16px}
  .curso-n{font-size:1.25rem}
  .temas{gap:10px}
  .tema{gap:10px 12px;padding:14px}
  .tema-num{width:36px;height:36px;font-size:1rem}
  .trust{gap:4px 16px;font-size:.9rem}
  .only-eso{margin-top:10px}
  .foot{padding:30px 0 80px}
  .foot-in{gap:16px}
}