/* ==========================================================
   Prof. Celso Sánchez Ramírez — celsosanchezramirez.com
   Sistema de diseño · tema mixto (base clara + bloques oscuros)
   ========================================================== */

:root{
  --accent:#084197;
  --accent-2:#5a89cb;
  --accent-soft:#e6eef9;
  --accent-light:#8fb4ea;
  --ink:#0b1630;
  --ink-2:#132349;
  --text:#1f2a3d;
  --muted:#5b6579;
  --base:#f5f7fb;
  --white:#ffffff;
  --line:#e2e7f0;
  --line-dark:rgba(255,255,255,.12);
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 12px 40px rgba(11,22,48,.09);
  --shadow-lg:0 26px 60px rgba(11,22,48,.16);
  --container:1250px;
  --gap:28px;
  --font-title:"Geist",system-ui,sans-serif;
  --font-body:"Source Sans 3","Geist",system-ui,sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;overflow-x:hidden}
body{margin:0;overflow-x:hidden;font-family:var(--font-body);font-size:1.075rem;line-height:1.65;color:var(--text);background:var(--white)}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration:none}
h1,h2,h3,h4,h5{font-family:var(--font-title);color:var(--ink);line-height:1.15;margin:0 0 .6em;font-weight:700;letter-spacing:-.015em}
h1{font-size:clamp(2.1rem,4.4vw,3.6rem);letter-spacing:-.025em}
h2{font-size:clamp(1.7rem,3vw,2.5rem);letter-spacing:-.02em}
h3{font-size:1.28rem}
h4{font-size:1.08rem}
p{margin:0 0 1em}
ul{margin:0;padding:0;list-style:none}
strong{font-weight:600}
em{font-style:italic}

.container{width:100%;max-width:var(--container);margin-inline:auto;padding-inline:24px}
.section{padding-block:clamp(64px,8vw,104px)}
.section--base{background:var(--base)}
.section-head{max-width:720px;margin-bottom:clamp(36px,5vw,56px)}
.section-head--center{margin-inline:auto;text-align:center}
.section-head p{color:var(--muted);font-size:1.12rem}
.lead{font-size:1.2rem;color:var(--muted)}

/* Eyebrow: solo texto */
.eyebrow{display:block;font-family:var(--font-title);font-size:.78rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);margin:0 0 12px}
.hero .eyebrow,.page-hero .eyebrow,.cta .eyebrow,.section--dark .eyebrow{color:var(--accent-light)}

/* Texto claro sobre fondos oscuros (regla obligatoria, incluye títulos) */
.hero,.page-hero,.cta,.section--dark,.site-footer{color:#fff}
.hero h1,.hero h2,.hero h3,.hero h4,
.page-hero h1,.page-hero h2,.page-hero h3,.page-hero h4,
.cta h1,.cta h2,.cta h3,.cta h4,
.section--dark h1,.section--dark h2,.section--dark h3,.section--dark h4,
.site-footer h4{color:#fff}
.hero p,.page-hero p,.cta p,.section--dark p{color:rgba(255,255,255,.8)}

/* ---------- Botones ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:13px 24px;border-radius:999px;font-family:var(--font-title);font-weight:600;font-size:.95rem;line-height:1;border:1.5px solid transparent;cursor:pointer;transition:transform .25s var(--ease),background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);white-space:nowrap}
.btn svg{width:18px;height:18px;flex:none}
.btn--primary{background:var(--accent);color:#fff!important;box-shadow:0 8px 22px rgba(8,65,151,.28)}
.btn--primary:hover{background:#0a4fb6;transform:translateY(-2px);box-shadow:0 12px 28px rgba(8,65,151,.34)}
.btn--ghost{background:transparent;color:var(--ink);border-color:rgba(11,22,48,.22)}
.btn--ghost:hover{border-color:var(--ink);transform:translateY(-2px)}
.hero .btn--ghost,.page-hero .btn--ghost,.cta .btn--ghost,.section--dark .btn--ghost{color:#fff;border-color:rgba(255,255,255,.45)}
.hero .btn--ghost:hover,.cta .btn--ghost:hover,.section--dark .btn--ghost:hover{border-color:#fff;background:rgba(255,255,255,.08)}
.btn--white{background:#fff;color:var(--accent)!important}
.btn--white:hover{background:#eef3fb;transform:translateY(-2px)}
.link-arrow{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-title);font-weight:600;font-size:.95rem;color:var(--accent)}
.link-arrow svg{width:16px;height:16px;transition:transform .25s var(--ease)}
.link-arrow:hover svg{transform:translateX(4px)}

/* ---------- Header ---------- */
.site-header{position:fixed;inset:0 0 auto 0;z-index:90;transition:background .3s var(--ease),box-shadow .3s var(--ease),padding .3s var(--ease)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;gap:24px;padding-block:16px}
.brand img{height:54px;width:auto}
.brand .logo-dark{display:none}
.site-header.is-scrolled{background:rgba(255,255,255,.94);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:0 4px 24px rgba(11,22,48,.08)}
.site-header.is-scrolled .container{padding-block:10px}
.site-header.is-scrolled .brand img{height:46px}
.site-header.is-scrolled .brand .logo-light{display:none}
.site-header.is-scrolled .brand .logo-dark{display:block}
.nav{display:flex;align-items:center;gap:6px}
.nav__list{display:flex;align-items:center;gap:2px}
.nav__list a{display:block;padding:9px 13px;border-radius:999px;font-family:var(--font-title);font-weight:500;font-size:.92rem;color:rgba(255,255,255,.88);transition:color .2s,background .2s}
.nav__list a:hover{background:rgba(255,255,255,.1);color:#fff}
.nav__list a.is-active{color:#fff;background:rgba(255,255,255,.14)}
.site-header.is-scrolled .nav__list a{color:var(--text)}
.site-header.is-scrolled .nav__list a:hover{background:var(--accent-soft);color:var(--accent)}
.site-header.is-scrolled .nav__list a.is-active{background:var(--accent-soft);color:var(--accent)}
.nav__cta{margin-left:10px}
.nav__cta-mobile{display:none}
.burger{display:none;width:44px;height:44px;border:0;background:transparent;border-radius:12px;cursor:pointer;padding:10px;flex-direction:column;justify-content:center;gap:5px}
.burger span{display:block;height:2px;width:100%;background:#fff;border-radius:2px;transition:transform .3s var(--ease),opacity .3s}
.site-header.is-scrolled .burger span,.site-header.is-open .burger span{background:var(--ink)}
.burger.is-active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.is-active span:nth-child(2){opacity:0}
.burger.is-active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-backdrop{position:fixed;inset:0;background:rgba(11,22,48,.55);opacity:0;visibility:hidden;transition:opacity .3s;z-index:70}
.nav-backdrop.is-open{opacity:1;visibility:visible}

/* ---------- Hero ---------- */
.hero{position:relative;isolation:isolate;background:var(--ink);overflow:hidden;min-height:min(92vh,880px);display:flex;align-items:center;padding:150px 0 90px}
.hero__bg{position:absolute;inset:0;z-index:-2}
.hero__bg img{width:100%;height:100%;object-fit:cover;object-position:center}
.hero::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(100deg,rgba(11,22,48,.92) 0%,rgba(11,22,48,.78) 45%,rgba(11,22,48,.35) 100%)}
.hero__grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero .eyebrow{margin-bottom:7px}
.hero h1{margin-top:15px;margin-bottom:22px;max-width:14ch}
.hero h1 em{font-style:normal;color:var(--accent-light)}
.hero p{font-size:1.2rem;max-width:52ch;margin-bottom:32px}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px}
.hero__portrait{position:relative;justify-self:end;width:min(100%,420px)}
.hero__portrait img{width:100%;aspect-ratio:3/4;object-fit:cover;object-position:top;border-radius:28px;box-shadow:var(--shadow-lg)}
.hero__portrait::before{content:"";position:absolute;inset:-18px 18px 18px -18px;border:1.5px solid rgba(255,255,255,.22);border-radius:32px;z-index:-1}
.hero__badge{position:absolute;left:-28px;bottom:36px;background:#fff;color:var(--ink);border-radius:16px;padding:14px 18px;box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:12px;max-width:300px}
.hero__badge svg{width:26px;height:26px;color:var(--accent);flex:none}
.hero__badge strong{display:block;font-family:var(--font-title);font-size:.95rem;line-height:1.2}
.hero__badge span{font-size:.82rem;color:var(--muted)}
.hero__scroll{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:rgba(255,255,255,.55);display:flex;flex-direction:column;align-items:center;gap:8px}
.hero__scroll::after{content:"";width:1px;height:34px;background:linear-gradient(rgba(255,255,255,.6),transparent)}

/* ---------- Page hero (interior) ---------- */
.page-hero{position:relative;isolation:isolate;background:var(--ink);overflow:hidden;padding:170px 0 90px}
.page-hero__bg{position:absolute;inset:0;z-index:-2}
.page-hero__bg img{width:100%;height:100%;object-fit:cover}
.page-hero::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,rgba(11,22,48,.86) 0%,rgba(11,22,48,.72) 100%)}
.page-hero .eyebrow{margin-bottom:7px}
.page-hero h1{margin-top:15px;max-width:16ch;margin-bottom:16px}
.page-hero p{font-size:1.18rem;max-width:58ch;margin:0}

/* ---------- Secciones oscuras con foto ---------- */
.section--dark{position:relative;isolation:isolate;background:var(--ink);overflow:hidden}
.section--dark .section__bg{position:absolute;inset:0;z-index:-2}
.section--dark .section__bg img{width:100%;height:100%;object-fit:cover}
.section--dark::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,rgba(11,22,48,.9) 0%,rgba(11,22,48,.88) 100%)}
.section--plano::after{display:none}
.section--dark .section-head p{color:rgba(255,255,255,.75)}

/* ---------- Intro (home) ---------- */
.intro__grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.intro__media{position:relative}
.intro__media img{border-radius:var(--radius);aspect-ratio:4/3;object-fit:cover;box-shadow:var(--shadow)}
.intro__media .media-tag{position:absolute;right:-16px;bottom:-20px;background:var(--accent);color:#fff;padding:16px 20px;border-radius:14px;font-family:var(--font-title);font-weight:600;font-size:.92rem;line-height:1.3;box-shadow:var(--shadow-lg);max-width:230px}
.intro__media .media-tag small{display:block;font-weight:400;opacity:.8;font-size:.8rem;margin-top:2px}
.credentials{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:28px}
.credential{display:flex;gap:12px;align-items:flex-start;padding:16px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--white)}
.credential svg{width:22px;height:22px;color:var(--accent);flex:none;margin-top:2px}
.credential strong{display:block;font-family:var(--font-title);font-size:.95rem;color:var(--ink)}
.credential span{font-size:.88rem;color:var(--muted)}

/* ---------- Tarjetas de pilares ---------- */
.pillars{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.pillar{background:var(--white);border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);transition:transform .3s var(--ease),box-shadow .3s var(--ease)}
.pillar:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.pillar img{aspect-ratio:4/3;object-fit:cover;width:100%}
.pillar__body{padding:20px 20px 24px}
.pillar__n{font-family:var(--font-title);font-size:.78rem;font-weight:600;letter-spacing:.12em;color:var(--accent-2)}
.pillar h3{font-size:1.12rem;margin:6px 0 8px}
.pillar p{font-size:.94rem;color:var(--muted);margin:0}
.section--dark .pillar{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.12)}
.section--dark .pillar h3{color:#fff}
.section--dark .pillar p{color:rgba(255,255,255,.72)}

/* ---------- Grilla de tarjetas genéricas ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--gap)}
.cards--2{grid-template-columns:repeat(2,1fr)}
.cards--4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px;transition:transform .3s var(--ease),box-shadow .3s var(--ease);display:flex;flex-direction:column}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.card__icon{width:52px;height:52px;border-radius:14px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;margin-bottom:20px}
.card__icon svg{width:26px;height:26px}
.card h3{margin-bottom:10px}
.card p{color:var(--muted);margin:0;font-size:1rem}
.card .link-arrow{margin-top:auto;padding-top:18px}
.section--dark .card{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.12);backdrop-filter:blur(6px)}
.section--dark .card__icon{background:rgba(255,255,255,.1);color:var(--accent-light)}
.section--dark .card p{color:rgba(255,255,255,.74)}

/* ---------- Media + texto ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.split--reverse .split__media{order:2}
.split__media img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;aspect-ratio:4/3;object-fit:cover}
.split__media--portrait img{aspect-ratio:3/4;max-width:460px;margin-inline:auto}
.checklist li{position:relative;padding-left:34px;margin-bottom:12px}
.checklist li::before{content:"";position:absolute;left:0;top:5px;width:20px;height:20px;border-radius:50%;background:var(--accent-soft)}
.checklist li::after{content:"";position:absolute;left:7px;top:9px;width:6px;height:10px;border:solid var(--accent);border-width:0 2px 2px 0;transform:rotate(45deg)}
.section--dark .checklist li::before{background:rgba(255,255,255,.14)}
.section--dark .checklist li::after{border-color:var(--accent-light)}

/* ---------- Pasos / proceso ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;counter-reset:step}
.step{position:relative;padding:28px 24px 26px;border-radius:var(--radius);background:var(--white);border:1px solid var(--line)}
.step__n{font-family:var(--font-title);font-size:2.2rem;font-weight:800;color:var(--accent-soft);line-height:1;margin-bottom:14px;letter-spacing:-.04em}
.step h3{font-size:1.12rem;margin-bottom:8px}
.step p{font-size:.96rem;color:var(--muted);margin:0}
.section--dark .step{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.12)}
.section--dark .step__n{color:rgba(255,255,255,.2)}
.section--dark .step p{color:rgba(255,255,255,.74)}

/* ---------- Galería ---------- */
.gallery{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:220px;gap:16px}
.gallery figure{margin:0;border-radius:var(--radius-sm);overflow:hidden;position:relative}
.gallery img{width:100%;height:100%;object-fit:cover;transition:transform .6s var(--ease)}
.gallery figure:hover img{transform:scale(1.05)}
.gallery figure:nth-child(1){grid-column:span 2;grid-row:span 2}
.gallery figcaption{position:absolute;inset:auto 0 0 0;padding:28px 16px 14px;font-size:.85rem;color:#fff;background:linear-gradient(transparent,rgba(11,22,48,.8))}

/* ---------- Cita ---------- */
.quote{text-align:center;max-width:820px;margin-inline:auto}
.quote blockquote{margin:0;font-family:var(--font-title);font-size:clamp(1.4rem,2.6vw,2.05rem);font-weight:500;line-height:1.35;letter-spacing:-.015em;color:#fff}
.quote cite{display:block;margin-top:22px;font-style:normal;font-size:.9rem;letter-spacing:.1em;text-transform:uppercase;color:var(--accent-light)}
.quote__mark{width:44px;height:44px;margin:0 auto 22px;color:var(--accent-light);opacity:.85}

/* ---------- Libro ---------- */
.book{display:grid;grid-template-columns:.9fr 1.1fr;gap:64px;align-items:center}
.book__cover{position:relative}
.book__cover img{border-radius:var(--radius);box-shadow:var(--shadow-lg);aspect-ratio:3/4;object-fit:cover;object-position:center;max-width:460px;margin-inline:auto}
.book__meta{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 26px}
.tag{display:inline-flex;align-items:center;gap:6px;padding:7px 13px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-family:var(--font-title);font-size:.82rem;font-weight:600}
.tag svg{width:14px;height:14px}

/* ---------- Bloque de recursos (Contenido gratuito) ---------- */
.channel{display:grid;grid-template-columns:1fr 1fr;gap:var(--gap)}
.channel__card{border-radius:var(--radius);padding:36px 34px;background:var(--white);border:1px solid var(--line);display:flex;flex-direction:column;gap:14px}
.channel__card--accent{background:var(--accent);border-color:var(--accent)}
.channel__card--accent h3,.channel__card--accent p{color:#fff}
.channel__card--accent p{opacity:.85}
.channel__card .card__icon{margin-bottom:6px}
.channel__card--accent .card__icon{background:rgba(255,255,255,.14);color:#fff}
.channel__card .btn{align-self:flex-start;margin-top:auto}
.topics{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.topic{display:flex;gap:14px;align-items:flex-start;padding:22px;border-radius:var(--radius-sm);background:var(--white);border:1px solid var(--line)}
.topic svg{width:24px;height:24px;color:var(--accent);flex:none;margin-top:2px}
.topic strong{display:block;font-family:var(--font-title);color:var(--ink);margin-bottom:4px}
.topic span{font-size:.94rem;color:var(--muted)}

/* ---------- Newsletter ---------- */
.newsletter{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;padding:clamp(32px,4vw,56px);border-radius:var(--radius);background:var(--accent-soft);border:1px solid #d5e2f5}
.newsletter h2{margin-bottom:10px}
.newsletter p{color:var(--muted);margin:0}
.newsletter__actions{display:flex;flex-direction:column;gap:12px;align-items:flex-start}
.newsletter__actions small{color:var(--muted);font-size:.88rem}

/* ---------- Próximamente (Cursos) ---------- */
.soon{max-width:760px;margin-inline:auto;text-align:center}
.soon__badge{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-family:var(--font-title);font-weight:600;font-size:.85rem;margin-bottom:22px}
.soon__badge i{width:8px;height:8px;border-radius:50%;background:var(--accent);display:inline-block}

/* ---------- Contacto ---------- */
.contact{display:grid;grid-template-columns:.85fr 1.15fr;gap:56px;align-items:start}
.contact-list li{margin-bottom:18px}
.contact-list a,.contact-list span.item{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-size:1.02rem}
.contact-list a:hover{color:var(--accent)}
.contact-list svg{width:20px;height:20px;flex:none;color:var(--accent)}
.contact-list small{display:block;font-size:.8rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:6px;font-family:var(--font-title)}
.social{display:flex;gap:10px;margin-top:24px}
.social a{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--accent-soft);color:var(--accent);transition:background .2s,color .2s,transform .2s}
.social a:hover{background:var(--accent);color:#fff;transform:translateY(-2px)}
.social svg{width:20px;height:20px}
.form{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(24px,3vw,38px);box-shadow:var(--shadow)}
.form__grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form__grid .field--full{grid-column:1/-1}
.field label{display:block;font-family:var(--font-title);font-size:.85rem;font-weight:600;color:var(--ink);margin-bottom:6px}
.field input,.field textarea{width:100%;font:inherit;font-size:1rem;padding:12px 14px;border:1.5px solid var(--line);border-radius:10px;background:#fbfcfe;color:var(--text);transition:border-color .2s,box-shadow .2s}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--accent-2);box-shadow:0 0 0 4px rgba(90,137,203,.18)}
.field textarea{min-height:140px;resize:vertical}
.form .btn{margin-top:20px}
.form-alert{display:none;padding:14px 16px;border-radius:10px;margin-bottom:18px;font-size:.98rem}
.form-alert.is-ok{display:block;background:#e7f6ec;color:#1c6b3a;border:1px solid #bfe5cc}
.form-alert.is-err{display:block;background:#fdecec;color:#a12626;border:1px solid #f3c2c2}

/* ---------- CTA ---------- */
.cta{position:relative;isolation:isolate;background:var(--ink);overflow:hidden;padding:clamp(72px,9vw,120px) 0}
.cta__bg{position:absolute;inset:0;z-index:-2}
.cta__bg img{width:100%;height:100%;object-fit:cover}
.cta::after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,rgba(11,22,48,.68),rgba(11,22,48,.6))}
.cta__inner{max-width:760px;margin-inline:auto;text-align:center}
.cta h2{font-size:clamp(1.9rem,3.4vw,2.8rem);margin-bottom:14px}
.cta p{font-size:1.15rem;margin-bottom:30px}
.cta__actions{display:flex;justify-content:center;flex-wrap:wrap;gap:14px}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);padding-block:clamp(52px,6vw,74px) 30px}
.footer-grid{display:grid;grid-template-columns:1.3fr 1.2fr 1fr 1.2fr;gap:40px}
.footer-brand img{height:56px;width:auto;margin-bottom:18px}
.footer-brand p{color:rgba(255,255,255,.66);font-size:.98rem;max-width:34ch;margin:0}
.site-footer h4{font-size:.82rem;letter-spacing:.12em;text-transform:uppercase;margin-bottom:18px;color:rgba(255,255,255,.9)}
.footer-links--nav{display:grid;grid-template-columns:1fr 1fr;grid-template-rows:repeat(4,auto);grid-auto-flow:column;column-gap:24px}
.footer-links li{margin-bottom:10px}
.footer-links a{color:rgba(255,255,255,.7);font-size:.98rem;transition:color .2s}
.footer-links a:hover{color:#fff}
.footer-contact li{margin-bottom:12px}
.footer-contact a,.footer-contact span{display:inline-flex;align-items:center;gap:10px;color:rgba(255,255,255,.7);font-size:.96rem;transition:color .2s}
.footer-contact a:hover{color:#fff}
.footer-contact svg{width:18px;height:18px;flex:none;color:var(--accent-light)}
.footer-credit{margin-top:40px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);text-align:center;font-size:.8rem;color:rgba(255,255,255,.6)}
.footer-credit a{color:inherit;text-decoration:none;transition:color .22s var(--ease)}
.footer-credit a:hover{color:rgba(255,255,255,.92)}

/* ---------- Animaciones ---------- */
.js .reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease);animation:reveal-failsafe 0s linear 3s forwards}
@keyframes reveal-failsafe{to{opacity:1;transform:none}}
.reveal.is-visible{opacity:1;transform:none;animation:none}
.reveal[data-delay="1"]{transition-delay:.1s}
.reveal[data-delay="2"]{transition-delay:.2s}
.reveal[data-delay="3"]{transition-delay:.3s}
.reveal[data-delay="4"]{transition-delay:.4s}
.reveal[data-delay="5"]{transition-delay:.5s}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  *,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important}
  html{scroll-behavior:auto}
}

/* ---------- Responsive ---------- */
@media (max-width:1100px){
  .pillars{grid-template-columns:repeat(3,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:1024px){
  .hero__grid{grid-template-columns:1fr 1fr;gap:32px}
  .cards{grid-template-columns:repeat(2,1fr)}
  .cards--4{grid-template-columns:repeat(2,1fr)}
  .split,.intro__grid,.book{gap:40px}
  .gallery{grid-template-columns:repeat(3,1fr)}
  .topics{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:880px){
  .burger{display:flex}
  .nav{position:fixed;top:0;right:0;bottom:0;width:min(84vw,360px);background:#fff;flex-direction:column;align-items:stretch;padding:96px 26px 32px;transform:translateX(100%);visibility:hidden;transition:transform .4s var(--ease),visibility 0s .4s;box-shadow:-20px 0 60px rgba(11,22,48,.2);overflow-y:auto}
  .nav.is-open{transform:none;visibility:visible;transition:transform .4s var(--ease),visibility 0s}
  .nav__list{flex-direction:column;align-items:stretch;gap:4px}
  .nav__list a{color:var(--text)!important;font-size:1.08rem;padding:12px 14px;border-radius:12px}
  .nav__list a.is-active{background:var(--accent-soft);color:var(--accent)!important}
  .nav__cta{display:none}
  .nav__cta-mobile{display:inline-flex;margin-top:18px}
  .site-header.is-open{background:transparent}
  .hero{min-height:auto;padding:130px 0 70px}
  .hero__grid{grid-template-columns:1fr}
  .hero__portrait{justify-self:start;width:min(100%,340px)}
  .hero__badge{left:auto;right:-10px}
  .hero__scroll{display:none}
  .intro__grid,.split,.book,.contact,.newsletter,.channel{grid-template-columns:1fr}
  .split--reverse .split__media{order:0}
  .pillars{grid-template-columns:repeat(2,1fr)}
  .page-hero{padding:140px 0 64px}
  .gallery{grid-template-columns:repeat(2,1fr);grid-auto-rows:180px}
  .gallery figure:nth-child(1){grid-column:span 2;grid-row:span 1}
}
@media (max-width:560px){
  body{font-size:1rem}
  h1{font-size:clamp(1.9rem,8vw,2.4rem)}
  h2{font-size:clamp(1.5rem,6vw,1.9rem)}
  .section{padding-block:56px}
  .brand img{height:44px}
  .site-header.is-scrolled .brand img{height:40px}
  .btn{padding:12px 20px;font-size:.9rem}
  .hero h1{max-width:none}
  .hero__badge{position:static;margin-top:16px;max-width:none}
  .hero__portrait::before{display:none}
  .cards,.cards--2,.cards--4,.pillars,.steps,.topics{grid-template-columns:1fr}
  .credentials{grid-template-columns:1fr}
  .form__grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:30px}
  .gallery{grid-template-columns:1fr 1fr;grid-auto-rows:150px}
  .intro__media .media-tag{position:static;margin-top:14px;max-width:none}
}