:root{--pa-primary-dark: #216577;--pa-primary: #358CA4;--pa-accent: #63B3D9;--pa-bg: #F5F7F8;--pa-surface: #FFFFFF;--pa-text: #0F172A;--pa-muted: #475569;--pa-border: #E5E7EB;--pa-radius: 14px;--pa-shadow: 0 8px 24px rgba(0,0,0,.08);--primary: var(--pa-primary);--secondary: #10B981;--bg: var(--pa-bg);--text: var(--pa-text);--muted: var(--pa-muted);--brand-blue: var(--pa-primary-dark);--brand-blue-hover: #1e4e58;--pa-accent-yellow: #F59E0B;--pa-accent-yellow-tint: #FEF3C7;--pa-accent-pink: #EC4899;--pa-accent-pink-tint: #FCE7F3;--pa-hero-bg: linear-gradient(180deg, rgba(53,140,164,.06), rgba(255,255,255,0));--hero-grad-start: #2563EB;--hero-grad-end: #22D3EE}*{box-sizing:border-box}html{scroll-behavior:smooth}html,body{margin:0;padding:0;background:var(--pa-bg);color:var(--pa-text);font-family:Inter,system-ui,Segoe UI,Roboto,Arial,sans-serif}.container{max-width:1100px;margin:0 auto;padding:0 1rem}:root{--brand-cyan:#2475EB;--brand-cyan-d:#1d5fd1}.brand{display:inline-flex;align-items:center;gap:.55rem;text-decoration:none}.brand-mark{display:inline-flex;align-items:center;justify-content:center;min-width:28px;height:28px;padding:0 6px;border-radius:999px;font-weight:800;color:#fff;background:linear-gradient(180deg,#22d3ee,#2563eb);box-shadow:0 4px 12px #2563eb40}.brand-text{display:inline-flex;align-items:center;height:28px;line-height:1;font-size:clamp(1.05rem,1.2vw + .6rem,1.35rem);font-weight:600;color:var(--brand-cyan);text-shadow:0 1px 0 rgba(255,255,255,.65),0 1px 8px rgba(2,6,23,.06)}.brand:hover .brand-text{color:var(--brand-cyan-d)}@media(max-width:420px){.brand-mark{min-width:24px;height:24px;font-size:.9rem}.brand-text{height:24px}}.site-header{background:var(--pa-surface);border-bottom:1px solid var(--pa-border);position:sticky;top:0;z-index:10}.nav{display:flex;align-items:center;justify-content:space-between;height:64px}.brand{color:var(--brand-blue);font-family:Montserrat,Inter,system-ui,sans-serif;font-weight:700;letter-spacing:.2px;text-decoration:none}.brand:hover{color:var(--brand-blue-hover)}.menu{list-style:none;display:flex;align-items:center;gap:.75rem;margin:0;padding:0}.menu>li{display:flex;align-items:center}.menu a{display:inline-flex;align-items:center;text-decoration:none;color:var(--pa-text);padding:.5rem .75rem;border-radius:.5rem}.menu a.active,.menu a:hover{background:#eaf6fb;color:var(--pa-primary-dark)}.btn-login{padding:.5rem .75rem;border:1px solid var(--pa-border);border-radius:.5rem;background:#f9fafb;font-weight:700}.btn-login[disabled]{opacity:.6;cursor:not-allowed}.hero{background:transparent;padding:2rem 0;border-bottom:none}.hero-card{background:var(--pa-surface);border:1px solid var(--pa-border);border-radius:var(--pa-radius);box-shadow:var(--pa-shadow);padding:1.25rem}.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:1.75rem;align-items:center}.hero-card{position:relative;overflow:clip}.hero-card:after{content:"";position:absolute;inset:0 0 auto;height:4px;background:linear-gradient(90deg,var(--hero-grad-start),var(--hero-grad-end))}.hero-card:before{content:"";position:absolute;inset:0;background:radial-gradient(900px 300px at 85% -10%,rgba(34,211,238,.14),transparent 60%),radial-gradient(700px 260px at -10% 110%,rgba(37,99,235,.12),transparent 60%);pointer-events:none;z-index:0}.hero-grid{position:relative;z-index:1}.hero-copy h1{font-family:Montserrat,Inter,sans-serif;font-weight:800;font-size:clamp(2rem,3vw,2.6rem);line-height:1.15;margin:.25rem 0 .75rem;letter-spacing:.2px}.hero .sub{color:var(--pa-muted);margin:.25rem 0 1rem;max-width:56ch}.hero-eyebrow{display:flex;gap:.5rem;flex-wrap:wrap;margin:0 0 .5rem}.chip{display:inline-flex;align-items:center;gap:.35rem;padding:.35rem .6rem;border-radius:999px;font-size:.85rem;font-weight:600;border:1px solid transparent}.chip--yellow{background:var(--pa-accent-yellow-tint);border-color:var(--pa-accent-yellow);color:#7c2d12}.chip--pink{background:var(--pa-accent-pink-tint);border-color:var(--pa-accent-pink);color:#831843}.hero-ctas{display:flex;gap:.75rem;flex-wrap:wrap;margin:.5rem 0 0}.badges{list-style:none;padding:0;margin:1rem 0 0;display:flex;gap:.5rem;flex-wrap:wrap}.badges li{background:#ecfeff;color:#055160;border:1px solid #b6eef7;padding:.35rem .6rem;border-radius:999px;font-size:.85rem;font-weight:600}.hero-img{width:100%;max-width:520px;justify-self:end;border-radius:1rem;box-shadow:var(--pa-shadow);border:1px solid var(--pa-border)}.h-underline{position:relative;display:inline-block;padding-bottom:.2rem}.h-underline:after{content:"";position:absolute;left:0;bottom:0;width:48px;height:3px;border-radius:2px;background:var(--pa-accent-pink)}@media(min-width:900px){.hero-card{padding:1.75rem}}@media(max-width:900px){.hero-grid{grid-template-columns:1fr}.hero-img{justify-self:center}}.btn{background:var(--pa-primary);color:#fff;border:1px solid transparent;padding:.75rem 1rem;border-radius:calc(var(--pa-radius) - 4px);font-weight:600;display:inline-flex;align-items:center;justify-content:center;gap:.5rem;white-space:nowrap;cursor:pointer}.btn:hover{filter:brightness(.96)}.btn:focus-visible{outline:3px solid rgba(53,140,164,.35);outline-offset:2px}.btn-primary{background:var(--pa-primary);color:#fff}.btn-accent{background-image:linear-gradient(180deg,var(--hero-grad-end),var(--hero-grad-start));color:#fff;border:1px solid rgba(0,0,0,.04);box-shadow:0 6px 14px #2563eb29}.btn-accent:hover{filter:none;transform:translateY(-1px)}.btn-accent:active{transform:translateY(0);box-shadow:0 3px 8px #2563eb29}.btn-whatsapp{background:#25d366;color:#fff}.btn-ghost{background:transparent;color:var(--pa-primary);border:1px solid var(--pa-primary)}.btn-ghost:hover{background:#eaf6fb}.btn-light{background:#ecfeff;color:#055160;border:1px solid #b6eef7}.card,.value-card{background:var(--pa-surface);border:1px solid var(--pa-border);border-radius:var(--pa-radius);padding:1rem;box-shadow:var(--pa-shadow)}.value-grid{display:grid;gap:1rem;grid-template-columns:repeat(4,1fr);padding:1.5rem 0}.value-card h3{margin:.25rem 0 .5rem}.value-card p{color:var(--pa-muted);margin:0 0 .5rem}.value-card a{color:var(--pa-primary-dark);text-decoration:none;font-weight:600}.value-card a:hover{text-decoration:underline}@media(max-width:1000px){.value-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:600px){.value-grid{grid-template-columns:1fr}}.demo{padding:1.5rem 0}.demo-form{display:flex;gap:.75rem;flex-wrap:wrap;align-items:end;margin:.5rem 0 1rem}.demo-form label{display:flex;flex-direction:column;gap:.35rem;color:var(--pa-muted);font-size:.95rem}.demo-form select{min-width:180px;padding:.55rem .6rem;border:1px solid var(--pa-border);border-radius:.5rem;background:#fff;color:var(--pa-text)}.demo-result .exercise{border:1px dashed var(--pa-border);border-radius:.75rem;padding:1rem;background:#fff}.personas{display:grid;gap:1rem;grid-template-columns:repeat(3,1fr);padding:1rem 0}.persona{background:var(--pa-surface);border:1px solid var(--pa-border);border-radius:var(--pa-radius);padding:1rem;box-shadow:var(--pa-shadow)}.persona p{color:var(--pa-muted)}@media(max-width:900px){.personas{grid-template-columns:1fr}}.catalog{padding:1.5rem 0}.catalog h2{margin:0 0 .75rem}.catalog .grid{display:grid;gap:1rem;grid-template-columns:repeat(3,1fr)}.catalog .card h4{margin:.25rem 0}.catalog .card p{color:var(--pa-muted);margin:0 0 .5rem}.catalog .card a{color:var(--pa-primary-dark);text-decoration:none;font-weight:600}.catalog .card a:hover{text-decoration:underline}@media(max-width:1000px){.catalog .grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:600px){.catalog .grid{grid-template-columns:1fr}}.classes-brief{padding:1.5rem 0}.ticks{list-style:none;padding-left:0;margin:.5rem 0 1rem}.ticks li{position:relative;padding-left:1.4rem;margin:.35rem 0}.ticks li:before{content:"✓";position:absolute;left:0;top:0;color:var(--pa-primary-dark);font-weight:800}.cta-row{display:flex;gap:.75rem;flex-wrap:wrap}.changelog .log{margin:.5rem 0 0}.changelog .log li{margin:.25rem 0}.testimonials blockquote{background:#fff;border-left:4px solid var(--pa-primary);padding:1rem;margin:.75rem 0;border-radius:.5rem;box-shadow:var(--pa-shadow)}.resources .grid{display:grid;gap:1rem;grid-template-columns:repeat(3,1fr)}@media(max-width:900px){.resources .grid{grid-template-columns:1fr}}.double-cta{display:grid;gap:1rem;grid-template-columns:repeat(2,1fr);padding:2rem 0}.double-cta>div{background:#fff;border:1px solid var(--pa-border);border-radius:var(--pa-radius);padding:1rem;box-shadow:var(--pa-shadow)}@media(max-width:900px){.double-cta{grid-template-columns:1fr}}.filters{display:flex;gap:1rem;flex-wrap:wrap;margin:.25rem 0 1rem}.filters label{display:flex;flex-direction:column;font-size:.9rem;color:var(--pa-muted)}.filters select{min-width:180px;padding:.5rem;border:1px solid var(--pa-border);border-radius:.5rem;background:#fff;color:var(--pa-text)}.actions{display:flex;gap:.75rem;margin:.5rem 0 1rem}.math-block{margin:1rem 0}.chart{background:#fff;border:1px dashed var(--pa-border);border-radius:.5rem;padding:.5rem}.answer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:1rem;align-items:start;justify-items:start}.chart-wrap{align-self:start;min-height:260px}@media(max-width:900px){.answer-grid{grid-template-columns:1fr}}.mjx-container{text-align:left!important}.mathjax{text-align:left}.site-footer{margin-top:2rem;padding:1.25rem 0;border-top:1px solid var(--pa-border);background:var(--pa-surface)}.footer-grid{display:flex;justify-content:space-between;align-items:center;gap:1rem}.site-footer a{text-decoration:none;color:var(--pa-primary-dark)}.site-footer a:hover{text-decoration:underline}.socials{display:flex;gap:.75rem}.socials a{display:inline-flex;padding:.25rem;border-radius:.5rem;color:var(--pa-text);opacity:.85}.socials a:hover{opacity:1;background:#f3f4f6}.socials svg{width:22px;height:22px;display:block}.socials a.linkedin:hover{color:#0a66c2}.socials a.instagram:hover{color:#e4405f}.socials a.whatsapp:hover{color:#25d366}#inicio,#ejercicios,#clases{scroll-margin-top:80px}