/* ════════════════════════════════════════════════════════════════
   recursos.javierbaz.com.uy — Hoja de estilos compartida del portal
   Usada por: home, índices de módulo (modulo-1..5) y páginas de
   estado (Material en preparación).
   Las páginas de CLASE conservan su CSS propio (simuladores/quiz);
   la sección /ia/ conserva su CSS editorial propio.
   Tema: oscuro por defecto; claro vía html[data-theme="light"]
   (el toggle vive en /js/site.js con clave localStorage "jb-theme").
   ════════════════════════════════════════════════════════════════ */

:root{
  --bg:#0d0f14; --surface:#141720; --surface2:#1c2030; --border:#2d3350;
  --accent:#00e5ff; --accent-soft:rgba(0,229,255,0.08); --accent2:#7c5cfc;
  --green:#2ecc8a; --amber:#f5a623; --red:#f25656; --teal:#1ec8c8;
  --text:#e8ecf4; --text2:#8b93a8; --text3:#555e78;
  --header-bg:#0a0c10; --shadow:0 10px 34px rgba(0,0,0,0.35);
}
html[data-theme="light"]{
  --bg:#f4f6fb; --surface:#ffffff; --surface2:#eef1f8; --border:#d4dbeb;
  --accent:#0099bb; --accent-soft:rgba(0,153,187,0.08);
  --text:#1a1f33; --text2:#50587a; --text3:#8a92ad;
  --shadow:0 10px 30px rgba(26,31,51,0.10);
}

/* ── Base ── */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
html,body{font-size:18px}
html{background:var(--bg);transition:background .3s}
body{font-family:'DM Sans',sans-serif;background:transparent;color:var(--text);
  min-height:100vh;display:flex;flex-direction:column;transition:color .3s;}

/* ── Iluminación de fondo ──────────────────────────────────────
   Tres halos radiales fijos que le sacan al fondo el aspecto de negro
   plano y dan profundidad. Puramente decorativo: va en z-index:-1 (no
   toca el apilado de ningún componente), con pointer-events:none (no
   intercepta un solo clic) y sin una línea de JS. Los colores son los
   de la marca — cyan del acento, violeta del acento2 y verde. */
body::before{
  content:'';position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(1000px 700px at 10% -10%,rgba(0,229,255,.13),transparent 60%),
    radial-gradient(850px 620px at 96% 2%,rgba(124,92,252,.12),transparent 58%),
    radial-gradient(900px 620px at 50% 100%,rgba(46,204,138,.06),transparent 62%);
}
/* En tema claro los mismos halos, muy atenuados: dan calidez sin ensuciar
   el blanco ni bajar el contraste del texto. */
html[data-theme="light"] body::before{
  background:
    radial-gradient(900px 600px at 12% -8%,rgba(0,153,187,.07),transparent 62%),
    radial-gradient(760px 560px at 92% 4%,rgba(124,92,252,.05),transparent 60%),
    radial-gradient(700px 700px at 50% 108%,rgba(46,204,138,.04),transparent 60%);
}
/* En papel no se imprimen: gastan tinta y no aportan nada. */
@media print{ body::before{display:none} }

a{color:var(--accent)}
a:focus-visible,button:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:6px}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  html{scroll-behavior:auto}
}

/* ── Header (siempre oscuro, fijo al hacer scroll) ── */
header.site-head{position:sticky;top:0;z-index:100;
  background:rgba(10,12,16,0.88);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid #2d3350;}
[id]{scroll-margin-top:76px;}
.top-strip{display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:12px 28px;flex-wrap:wrap;max-width:1200px;margin:0 auto;}
.brand-line{font-family:'Space Mono',monospace;font-size:15px;color:#8b93a8;letter-spacing:.4px}
.brand-line a{text-decoration:none;font-weight:700}
.brand-line a .jb-javier{color:#ffffff}
.brand-line a .jb-baz{color:#00e5ff}
.brand-line a:hover .jb-javier{color:#00e5ff}
#themeToggle{background:transparent;border:1px solid #2d3350;color:#e8ecf4;
  font-size:18px;line-height:1;padding:8px 14px;border-radius:999px;
  cursor:pointer;transition:border-color .2s,background .2s;}
#themeToggle:hover{border-color:#00e5ff;background:rgba(0,229,255,0.08)}
.strip-actions{display:flex;align-items:center;gap:10px}
/* mini-nav de secciones del portal (la inyecta /js/site.js en la barra fija) */
.strip-nav{display:flex;align-items:center;gap:4px;font-family:'Space Mono',monospace;
  font-size:12.5px;font-weight:700;letter-spacing:.02em;}
.strip-nav a{color:#8b93a8;text-decoration:none;padding:6px 11px;border-radius:8px;
  border:1px solid transparent;transition:color .2s,border-color .2s,background .2s;white-space:nowrap;}
.strip-nav a:hover{color:#00e5ff}
.strip-nav a.activa{color:#00e5ff;border-color:#2d3350;background:rgba(0,229,255,.06)}
@media (max-width:480px){.strip-nav a{padding:6px 8px;font-size:12px}}
.strip-cta{display:inline-flex;align-items:center;gap:7px;
  font-family:'Space Mono',monospace;font-size:13px;font-weight:700;letter-spacing:.3px;
  color:#063d1e;background:#25d366;border-radius:999px;padding:8px 16px;
  text-decoration:none;white-space:nowrap;transition:transform .2s,box-shadow .2s;}
.strip-cta:hover{transform:translateY(-1px);box-shadow:0 6px 18px rgba(37,211,102,0.35)}
@media (max-width:720px){.strip-cta{display:none}}

/* ── Breadcrumb ── */
.breadcrumb{max-width:1200px;margin:0 auto;width:100%;padding:16px 28px 0;
  font-family:'Space Mono',monospace;font-size:14px;color:var(--text3);}
.breadcrumb a{color:var(--accent);text-decoration:none}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb span{margin:0 8px;color:var(--text3)}

/* ── Hero ── */
/* El hero ocupa la primera pantalla entera: si es un bloque plano, todo el
   sitio se lee como "negro sólido". Lleva sus propios halos y, sobre todo,
   un degradado vertical que lo funde con el fondo del body — así no queda
   el corte duro entre la banda del hero y el resto de la página. */
.hero{background:
    radial-gradient(1100px 520px at 82% -12%, rgba(0,229,255,0.16), transparent 62%),
    radial-gradient(820px 460px at 8% 104%, rgba(124,92,252,0.14), transparent 62%),
    linear-gradient(180deg, #0a0c10 0%, #0b0e16 58%, #0d0f14 100%);
  color:#e8ecf4;padding:50px 28px 54px;}
.hero-inner{max-width:1200px;margin:0 auto}
.chip{display:inline-flex;align-items:center;gap:8px;
  font-family:'Space Mono',monospace;font-size:14px;font-weight:700;
  color:#00e5ff;background:rgba(0,229,255,0.10);border:1px solid rgba(0,229,255,0.35);
  padding:7px 16px;border-radius:999px;margin-bottom:20px;letter-spacing:.4px;}
.hero h1{font-family:'Bricolage Grotesque',sans-serif;font-weight:800;
  font-size:clamp(32px,5vw,48px);line-height:1.12;max-width:840px;}
.hero h1 .cy{color:#00e5ff}
.hero-sub{margin-top:18px;max-width:720px;font-size:19px;font-weight:300;color:#8b93a8;line-height:1.6;}
.hero-sub strong{color:#e8ecf4;font-weight:600}

/* línea estilo terminal */
.term-line{margin-top:30px;font-family:'Space Mono',monospace;font-size:14px;color:#555e78;
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;}
.term-line .prompt{color:#2ecc8a}
.term-line .cursor{display:inline-block;width:9px;height:18px;background:#00e5ff;
  animation:blink 1.1s steps(1) infinite;vertical-align:middle;}
@keyframes blink{50%{opacity:0}}

.hero-stats{margin-top:34px;display:flex;gap:14px;flex-wrap:wrap}
.stat{background:rgba(255,255,255,0.03);border:1px solid #2d3350;border-radius:14px;
  padding:14px 22px;min-width:140px;}
.stat b{display:block;font-family:'Space Mono',monospace;font-size:26px;color:#00e5ff;font-weight:700;}
.stat span{font-size:14px;color:#8b93a8}

/* atajos del hero a las secciones del portal */
.hero-links{margin-top:26px;display:flex;gap:10px;flex-wrap:wrap}
.hero-links a{display:inline-flex;align-items:center;gap:8px;
  font-family:'Space Mono',monospace;font-size:13px;font-weight:700;letter-spacing:.02em;
  color:#c8cfde;background:rgba(255,255,255,0.03);border:1px solid #2d3350;
  border-radius:999px;padding:10px 18px;text-decoration:none;
  transition:color .2s,border-color .2s,transform .2s;}
.hero-links a:hover{color:#00e5ff;border-color:#00e5ff;transform:translateY(-2px)}
.hero-links a.destacado{color:#06262b;background:#00e5ff;border-color:#00e5ff}
.hero-links a.destacado:hover{color:#06262b;transform:translateY(-2px);box-shadow:0 10px 24px rgba(0,229,255,.3)}

/* ── Main ── */
main{flex:1;max-width:1200px;width:100%;margin:0 auto;padding:48px 28px 64px}
.section-label{font-family:'Space Mono',monospace;font-size:14px;font-weight:700;
  color:var(--accent);letter-spacing:1px;margin-bottom:26px;}

/* ── Grid de módulos (home) ── */
.mod-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(340px,1fr));gap:24px}
.mod-card{background:var(--surface);border:1px solid var(--border);border-radius:18px;
  box-shadow:var(--shadow);overflow:hidden;display:flex;flex-direction:column;
  transition:transform .25s,border-color .25s;animation:cardIn .5s both;}
.mod-card:nth-child(2){animation-delay:.06s}
.mod-card:nth-child(3){animation-delay:.12s}
.mod-card:nth-child(4){animation-delay:.18s}
.mod-card:nth-child(5){animation-delay:.24s}
@keyframes cardIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}
.mod-card:hover{transform:translateY(-4px);border-color:var(--accent)}
/* thumbnail "product-shot" del nivel (SVG en /img/cursos/) */
.mod-thumb{display:block;border-bottom:1px solid var(--border);background:#12151d;
  line-height:0;overflow:hidden}
.mod-thumb img{display:block;width:100%;height:auto;transition:transform .45s ease}
.mod-card:hover .mod-thumb img{transform:scale(1.045)}
.mod-head{display:block;text-decoration:none;color:inherit;padding:26px 28px 20px;
  border-bottom:1px solid var(--border);position:relative;}
.mod-head::after{content:'';position:absolute;left:0;top:0;bottom:0;width:4px;
  background:linear-gradient(180deg,var(--accent),var(--accent2));opacity:0;transition:opacity .25s;}
.mod-card:hover .mod-head::after{opacity:1}
.mod-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}
.mod-num{font-family:'Space Mono',monospace;font-size:14px;font-weight:700;color:var(--accent);letter-spacing:1px;}
.mod-count{font-family:'Space Mono',monospace;font-size:13px;color:var(--text3)}
.mod-head h2{font-family:'Bricolage Grotesque',sans-serif;font-weight:700;
  font-size:22px;line-height:1.25;display:flex;align-items:center;gap:10px;}
.mod-head .emoji{font-size:24px}
.mod-desc{margin-top:10px;font-size:15px;color:var(--text2);line-height:1.55}

.class-list{list-style:none;padding:12px 14px 18px;flex:1}
.class-list li{margin:4px 0}
.class-list a{display:flex;align-items:center;gap:14px;text-decoration:none;color:var(--text);
  font-size:17px;padding:10px 14px;border-radius:12px;transition:background .18s,color .18s;}
.class-list a:hover{background:var(--accent-soft);color:var(--accent)}
.cl-num{font-family:'Space Mono',monospace;font-size:13px;font-weight:700;
  color:var(--text3);min-width:30px;text-align:right;transition:color .18s;}
.class-list a:hover .cl-num{color:var(--accent)}
.cl-eval .cl-name{color:var(--amber)}
.cl-eval:hover .cl-name{color:var(--amber)}

/* ── Grid de clases (índices de módulo) ── */
.class-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}
.class-card{background:var(--surface);border:1px solid var(--border);border-radius:18px;
  box-shadow:var(--shadow);padding:24px 26px;text-decoration:none;color:var(--text);
  display:flex;flex-direction:column;gap:10px;transition:transform .25s,border-color .25s;
  position:relative;overflow:hidden;}
.class-card::after{content:'';position:absolute;left:0;top:0;bottom:0;width:4px;
  background:linear-gradient(180deg,var(--accent),var(--accent2));opacity:0;transition:opacity .25s;}
.class-card:hover{transform:translateY(-4px);border-color:var(--accent)}
.class-card:hover::after{opacity:1}
.cc-meta{display:flex;align-items:center;justify-content:space-between;gap:10px}
.cc-num{font-family:'Space Mono',monospace;font-size:13px;font-weight:700;color:var(--accent);letter-spacing:1px;}
.cc-lock{font-size:14px;color:var(--text3)}
.class-card h2{font-family:'Bricolage Grotesque',sans-serif;font-weight:700;font-size:21px;line-height:1.3}
.class-card p{font-size:15px;color:var(--text2);line-height:1.55}
.cc-eval h2{color:var(--amber)}
.back{display:inline-flex;align-items:center;gap:8px;margin-top:36px;
  font-size:16px;color:var(--accent);text-decoration:none;font-weight:600;}
.back:hover{text-decoration:underline}

/* ── Nota / highlight ── */
.highlight{margin-top:42px;background:var(--accent-soft);border-left:4px solid var(--accent);
  border-radius:0 14px 14px 0;padding:20px 26px;font-size:16px;color:var(--text2);line-height:1.6;}
.highlight strong{color:var(--text)}

/* ── Banda sección IA (home) ── */
.ia-band{margin-top:42px;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  background:linear-gradient(135deg,rgba(0,229,255,0.07),rgba(124,92,252,0.09)),var(--surface);
  border:1px solid var(--border);border-radius:18px;padding:28px 30px;box-shadow:var(--shadow);}
.ia-band .ia-txt h2{font-family:'Bricolage Grotesque',sans-serif;font-weight:700;font-size:22px;
  display:flex;align-items:center;gap:10px;margin-bottom:6px;}
.ia-band .ia-txt p{font-size:15px;color:var(--text2);line-height:1.6;max-width:62ch;}
.ia-band .ia-new{font-family:'Space Mono',monospace;font-size:12px;font-weight:700;color:var(--green);
  background:rgba(46,204,138,0.10);border:1px solid rgba(46,204,138,0.4);
  padding:3px 10px;border-radius:999px;letter-spacing:.5px;vertical-align:middle;}
.ia-band .ia-btn{display:inline-block;background:var(--accent);color:#06262b;font-weight:700;
  font-size:16px;padding:13px 26px;border-radius:12px;text-decoration:none;
  transition:transform .2s;white-space:nowrap;}
.ia-band .ia-btn:hover{transform:translateY(-2px)}

/* ── Banda de conversión (contenido de valor → capacitación) ── */
.cta-band{margin-top:42px;display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  background:linear-gradient(135deg,rgba(46,204,138,0.07),rgba(0,229,255,0.06)),var(--surface);
  border:1px solid var(--border);border-radius:18px;padding:28px 30px;box-shadow:var(--shadow);}
.cta-band h2{font-family:'Bricolage Grotesque',sans-serif;font-weight:700;font-size:22px;
  display:flex;align-items:center;gap:10px;margin-bottom:6px;}
.cta-band p{font-size:15px;color:var(--text2);line-height:1.6;max-width:62ch}
.cta-band p a{color:var(--accent);text-decoration:none;font-weight:600}
.cta-band p a:hover{text-decoration:underline}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.btn-wa{display:inline-block;background:#25d366;color:#063d1e;font-weight:700;font-size:16px;
  padding:13px 24px;border-radius:12px;text-decoration:none;transition:transform .2s;white-space:nowrap;}
.btn-wa:hover{transform:translateY(-2px)}
.btn-line{display:inline-block;border:1px solid var(--border);color:var(--text2);font-weight:600;
  font-size:15px;padding:12px 22px;border-radius:12px;text-decoration:none;transition:border-color .2s,color .2s;white-space:nowrap;}
.btn-line:hover{border-color:var(--accent);color:var(--accent)}
.cta-note{font-size:13px;color:var(--text3);flex-basis:100%;font-family:'Space Mono',monospace}

/* ── Footer ── */
footer{background:var(--header-bg);border-top:1px solid #2d3350;color:#8b93a8;
  text-align:center;font-size:15px;padding:24px 20px;}
footer a{color:#00e5ff;text-decoration:none;font-weight:600}
footer a:hover{text-decoration:underline}
.foot-links{margin-top:10px;font-size:14px;color:#555e78}
.foot-links a{font-weight:500;color:#8b93a8}
.foot-links a:hover{color:#00e5ff}

/* ══════════════════ SECCIÓN EXCEL · páginas de clase (lección) ══════════════════ */
.lesson{max-width:820px;margin:0 auto}
.lesson .lead{font-size:19px;color:var(--text2);line-height:1.6;margin-bottom:8px}
.lesson h2{font-family:'Bricolage Grotesque',sans-serif;font-weight:700;font-size:26px;
  margin:38px 0 14px;line-height:1.25}
.lesson h2 .n{color:var(--accent);font-family:'Space Mono',monospace;font-size:18px;margin-right:10px}
.lesson p{font-size:17px;color:var(--text2);line-height:1.7;margin-bottom:16px}
.lesson strong{color:var(--text);font-weight:600}
.lesson ul{margin:0 0 16px 22px;color:var(--text2);line-height:1.7}
.lesson li{margin-bottom:6px}
.lesson code{font-family:'Space Mono',monospace;background:var(--surface2);border:1px solid var(--border);
  border-radius:6px;padding:2px 7px;font-size:15px;color:var(--accent)}

/* mini planilla de ejemplo (4 columnas: índice + A B C) */
.xl{border:1px solid var(--border);border-radius:12px;overflow:hidden;margin:10px 0 22px;
  font-family:'Space Mono',monospace;font-size:14px}
.xl-row{display:grid;grid-template-columns:38px repeat(3,1fr)}
.xl-row>div{padding:9px 12px;border-right:1px solid var(--border);border-bottom:1px solid var(--border)}
.xl-row>div:last-child{border-right:none}
.xl-row:last-child>div{border-bottom:none}
.xl-h{background:var(--surface2);color:var(--text3);text-align:center;font-weight:700}
.xl-i{background:var(--surface2);color:var(--text3);text-align:center}
.xl-c{background:var(--surface);color:var(--text)}
.xl-hl{background:var(--accent-soft);color:var(--accent);font-weight:700}

/* mini-conversación con la IA (el .xl de la ruta de IA) */
.chat{border:1px solid var(--border);border-radius:14px;overflow:hidden;margin:10px 0 22px;background:var(--surface)}
.chat>div{padding:13px 18px;font-size:15.5px;line-height:1.6;border-bottom:1px solid var(--border)}
.chat>div:last-child{border-bottom:none}
.chat .rol{display:block;font-family:'Space Mono',monospace;font-size:10.5px;font-weight:700;
  letter-spacing:.12em;color:var(--text3);margin-bottom:5px;text-transform:uppercase}
.chat .yo{background:var(--accent-soft)}
.chat .yo .rol{color:var(--accent)}
.chat .ia .rol{color:var(--green)}

/* mini-documento de Word (el .xl de la ruta de Word) */
.doc{border:1px solid var(--border);border-radius:12px;overflow:hidden;margin:10px 0 22px;
  background:var(--surface)}
.doc-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:9px 16px;
  background:var(--surface2);border-bottom:1px solid var(--border);
  font-family:'Space Mono',monospace;font-size:11.5px;letter-spacing:.04em;color:var(--text3)}
.doc-bar b{color:var(--accent);font-weight:700}
.doc-page{padding:20px 24px;font-size:15.5px;line-height:1.7;color:var(--text2)}
.doc-h1{font-family:'Bricolage Grotesque',sans-serif;font-size:20px;font-weight:700;
  color:var(--text);line-height:1.3;margin:0 0 6px}
.doc-h2{font-family:'Bricolage Grotesque',sans-serif;font-size:16.5px;font-weight:700;
  color:var(--accent);line-height:1.3;margin:16px 0 6px}
.doc-p{margin:0 0 10px}
.doc-p:last-child{margin-bottom:0}
/* etiqueta del estilo aplicado (p. ej. «Título 1») */
.doc-tag{display:inline-block;font-family:'Space Mono',monospace;font-size:10px;font-weight:700;
  letter-spacing:.06em;color:var(--accent);background:var(--accent-soft);
  border:1px solid var(--border);border-radius:6px;padding:1px 7px;margin-left:8px;
  vertical-align:middle;white-space:nowrap}
/* campo de combinación de correspondencia («Nombre») */
.doc-campo{font-family:'Space Mono',monospace;font-size:13.5px;color:var(--accent2);
  background:rgba(124,92,252,.15);border:1px dashed var(--accent2);border-radius:5px;
  padding:1px 6px;white-space:nowrap}

/* reto para practicar */
.reto{background:linear-gradient(135deg,rgba(245,166,35,.08),transparent),var(--surface);
  border:1px solid var(--border);border-left:4px solid var(--amber);border-radius:0 14px 14px 0;
  padding:20px 24px;margin:26px 0}
.reto h3{font-family:'Bricolage Grotesque',sans-serif;font-size:19px;margin-bottom:8px;color:var(--text);
  display:flex;align-items:center;gap:10px}
.reto p{font-size:16px;color:var(--text2);margin-bottom:8px;line-height:1.6}
.reto p:last-child{margin-bottom:0}

/* concepto clave (reutiliza la idea de .highlight, más compacto) */
.clave{background:var(--accent-soft);border-left:4px solid var(--accent);border-radius:0 12px 12px 0;
  padding:16px 22px;margin:22px 0;font-size:16px;color:var(--text2);line-height:1.6}
.clave b{color:var(--text)}

/* "cuándo NO funciona" — errores típicos de una función (rojo = trampa) */
.ojo{background:linear-gradient(135deg,rgba(255,107,107,.10),transparent),var(--surface);
  border:1px solid var(--border);border-left:4px solid #ff6b6b;border-radius:0 14px 14px 0;
  padding:18px 24px;margin:24px 0;font-size:16px;color:var(--text2);line-height:1.65}
.ojo b{display:block;margin-bottom:6px;color:var(--text);
  font-family:'Bricolage Grotesque',sans-serif;font-size:17px}
.ojo ul{margin:8px 0 0 20px}
.ojo li{margin-bottom:7px}
.ojo li b{display:inline;margin:0;font-family:inherit;font-size:inherit;color:var(--text)}

/* CTA "tentación" — la invitación a contactarte */
.lesson-cta{background:linear-gradient(135deg,rgba(46,204,138,.10),rgba(0,229,255,.06)),var(--surface);
  border:1px solid var(--border);border-radius:16px;padding:28px;margin:36px 0;text-align:center}
.lesson-cta h3{font-family:'Bricolage Grotesque',sans-serif;font-size:23px;margin-bottom:8px}
.lesson-cta p{font-size:16px;color:var(--text2);line-height:1.6;max-width:60ch;margin:0 auto 20px}
.lesson-cta .btn-wa{display:inline-block;background:#25d366;color:#063d1e;font-weight:700;font-size:16px;
  padding:14px 30px;border-radius:12px;text-decoration:none;transition:transform .2s}
.lesson-cta .btn-wa:hover{transform:translateY(-2px)}

/* navegación entre clases */
.lesson-nav{display:flex;justify-content:space-between;gap:16px;margin-top:36px;
  border-top:1px solid var(--border);padding-top:20px;flex-wrap:wrap}
.lesson-nav a{color:var(--accent);text-decoration:none;font-weight:600;font-size:15px}
.lesson-nav a:hover{text-decoration:underline}
.lesson-nav .disabled{color:var(--text3);pointer-events:none}

/* estado "en preparación" en los índices */
.class-card.soon,.mod-card.soon{opacity:.5}
.class-card.soon{pointer-events:none}
.cc-soon{font-size:13px;color:var(--text3)}
.badge-free{font-family:'Space Mono',monospace;font-size:11px;font-weight:700;color:var(--green);
  background:rgba(46,204,138,.10);border:1px solid rgba(46,204,138,.4);padding:3px 9px;
  border-radius:999px;letter-spacing:.5px}

/* ── Responsive ── */
@media (max-width:640px){
  .hero{padding:40px 20px 44px}
  main{padding:36px 18px 52px}
  .top-strip,.breadcrumb{padding-left:18px;padding-right:18px}
  .mod-grid,.class-grid{grid-template-columns:1fr}
  .stat{min-width:120px;padding:12px 16px}
  .lesson h2{font-size:23px}
  .xl{font-size:12.5px}
  .xl-row{grid-template-columns:30px repeat(3,1fr)}
}