/* =========================================================
   Coding for Engineers — Curso de Ingeniería Computacional
   Hoja de estilos
   ========================================================= */

:root{
  --bg:#0d1117; --bg-elev:#161b22; --bg-elev2:#1c2434; --bg-codigo:#0a0e16;
  --borde:#2a3343; --borde-suave:#222a38;
  --texto:#e6edf3; --texto-suave:#9aa7b8; --texto-tenue:#6b7888;
  --acento:#4cc9f0; --acento-osc:#2f97c7; --acento2:#f4a261; --acento2-osc:#d4843f;
  --exito:#5bd99a; --exito-osc:#39a36e; --error:#f0707f; --aviso:#f4c95d;
  --sombra:0 8px 28px rgba(0,0,0,.45);
  --fuente:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:"SF Mono","JetBrains Mono","Fira Code",Menlo,Consolas,"Courier New",monospace;
  --r:10px; --ancho-lateral:300px;
}
[data-tema="claro"]{
  --bg:#f4f6f9; --bg-elev:#ffffff; --bg-elev2:#eef1f6; --bg-codigo:#1c2330;
  --borde:#d6dde6; --borde-suave:#e4e9ef;
  --texto:#1a2230; --texto-suave:#55606f; --texto-tenue:#8893a2;
  --acento:#0c7ca6; --acento-osc:#0a6488; --acento2:#c2710c; --acento2-osc:#a05f0a;
  --exito:#1f8f5c; --exito-osc:#16744a; --error:#c63f4e; --aviso:#b9821b;
  --sombra:0 8px 24px rgba(20,30,50,.12);
}

*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:var(--fuente); background:var(--bg); color:var(--texto);
  line-height:1.65; -webkit-font-smoothing:antialiased; font-size:16px;
}
a{color:var(--acento);text-decoration:none}
a:hover{text-decoration:underline}

/* ---------- Barra superior ---------- */
.barra-superior{
  position:sticky;top:0;z-index:40; height:60px;
  display:flex;align-items:center;gap:14px; padding:0 16px;
  background:var(--bg-elev); border-bottom:1px solid var(--borde);
}
.marca{display:flex;align-items:center;gap:10px;color:var(--texto)}
.marca:hover{text-decoration:none}
.marca-logo{display:flex}
.marca-texto{display:flex;flex-direction:column;line-height:1.15}
.marca-texto strong{font-size:.98rem;letter-spacing:.2px}
.marca-texto small{font-size:.7rem;color:var(--texto-suave);letter-spacing:.5px;text-transform:uppercase}
.barra-progreso-global{margin-left:auto;display:flex;align-items:center;gap:8px;min-width:130px}
.barra-progreso-pista{flex:1;height:7px;background:var(--bg-elev2);border-radius:99px;overflow:hidden}
.barra-progreso-relleno{height:100%;width:0;background:linear-gradient(90deg,var(--acento),var(--exito));border-radius:99px;transition:width .5s ease}
.barra-progreso-num{font-size:.78rem;color:var(--texto-suave);font-variant-numeric:tabular-nums;min-width:34px;text-align:right}
.btn-icono{
  background:var(--bg-elev2);border:1px solid var(--borde);color:var(--texto);
  width:38px;height:38px;border-radius:8px;cursor:pointer;font-size:1.05rem;
  display:flex;align-items:center;justify-content:center;transition:.15s;
}
.btn-icono:hover{border-color:var(--acento);color:var(--acento)}
.btn-idioma{font-size:.74rem;font-weight:700;letter-spacing:.5px}
#btn-menu{display:none}

/* ---------- Disposición ---------- */
.disposicion{display:flex;min-height:calc(100vh - 60px)}
.lateral{
  width:var(--ancho-lateral);flex-shrink:0;
  background:var(--bg-elev);border-right:1px solid var(--borde);
  height:calc(100vh - 60px);position:sticky;top:60px;overflow-y:auto;
}
.principal{flex:1;min-width:0;display:flex;flex-direction:column}
.vista{flex:1;max-width:880px;width:100%;margin:0 auto;padding:38px 42px 60px}
.velo-lateral{display:none}

/* ---------- Navegación del curso ---------- */
.nav-curso{padding:14px 10px 40px}
.nav-enlace-fijo{
  display:flex;align-items:center;gap:9px;padding:9px 12px;border-radius:8px;
  color:var(--texto-suave);font-size:.9rem;font-weight:500;cursor:pointer;
}
.nav-enlace-fijo:hover{background:var(--bg-elev2);color:var(--texto);text-decoration:none}
.nav-enlace-fijo.activo{background:var(--bg-elev2);color:var(--acento)}
.nav-enlace-fijo .ico{font-size:1rem;width:20px;text-align:center}
.nav-sep{height:1px;background:var(--borde-suave);margin:12px 8px}
.nav-rotulo{font-size:.7rem;text-transform:uppercase;letter-spacing:.8px;color:var(--texto-tenue);padding:6px 14px 4px}

.modulo-nav{margin:2px 0}
.modulo-cab{
  display:flex;align-items:center;gap:9px;padding:9px 12px;border-radius:8px;cursor:pointer;
  user-select:none;transition:.12s;
}
.modulo-cab:hover{background:var(--bg-elev2)}
.modulo-num{
  flex-shrink:0;width:24px;height:24px;border-radius:6px;font-size:.78rem;font-weight:700;
  display:flex;align-items:center;justify-content:center;
  background:var(--bg-elev2);color:var(--texto-suave);border:1px solid var(--borde);
}
.modulo-nav.disponible .modulo-num{background:rgba(76,201,240,.14);color:var(--acento);border-color:transparent}
.modulo-nav.completo .modulo-num{background:var(--exito);color:#062;border-color:transparent}
.modulo-tit{flex:1;font-size:.86rem;font-weight:600;line-height:1.3}
.modulo-flecha{color:var(--texto-tenue);font-size:.7rem;transition:transform .2s}
.modulo-nav.abierto .modulo-flecha{transform:rotate(90deg)}
.modulo-lecciones{display:none;padding:2px 0 6px 4px;margin-left:23px;border-left:1px solid var(--borde-suave)}
.modulo-nav.abierto .modulo-lecciones{display:block}

.leccion-nav{
  display:flex;align-items:center;gap:8px;padding:7px 10px 7px 12px;border-radius:7px;
  cursor:pointer;font-size:.82rem;color:var(--texto-suave);
}
.leccion-nav:hover{background:var(--bg-elev2);color:var(--texto);text-decoration:none}
.leccion-nav.activo{background:rgba(76,201,240,.12);color:var(--acento);font-weight:600}
.leccion-marca{
  flex-shrink:0;width:16px;height:16px;border-radius:50%;border:1.6px solid var(--borde);
  display:flex;align-items:center;justify-content:center;font-size:.62rem;
}
.leccion-nav.hecha .leccion-marca{background:var(--exito);border-color:var(--exito);color:#052}
.leccion-nav .leccion-tit{flex:1;line-height:1.3}
.candado{font-size:.72rem;opacity:.6}
.leccion-nav.bloqueada,.modulo-cab.bloqueada{opacity:.55;cursor:default}
.leccion-nav.bloqueada:hover{background:none;color:var(--texto-suave)}

/* ---------- Tipografía de contenido ---------- */
.vista h1{font-size:1.92rem;line-height:1.2;margin-bottom:6px;letter-spacing:-.4px}
.vista h2{font-size:1.34rem;margin:34px 0 12px;letter-spacing:-.2px;
  padding-bottom:7px;border-bottom:1px solid var(--borde-suave)}
.vista h3{font-size:1.08rem;margin:24px 0 8px;color:var(--texto)}
.vista p{margin:12px 0}
.vista ul,.vista ol{margin:12px 0 12px 24px}
.vista li{margin:6px 0}
.vista strong{color:var(--texto);font-weight:700}
.vista em{color:var(--acento)}
code:not(pre code){
  font-family:var(--mono);font-size:.86em;background:var(--bg-elev2);
  padding:.12em .42em;border-radius:5px;border:1px solid var(--borde-suave);
  color:var(--acento);white-space:nowrap;
}
[data-tema="claro"] code:not(pre code){color:var(--acento-osc)}

/* ---------- Migas / cabecera de lección ---------- */
.migas{font-size:.78rem;color:var(--texto-tenue);margin-bottom:14px;letter-spacing:.3px}
.migas a{color:var(--texto-suave)}
.cab-leccion{
  display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center;
  margin:14px 0 6px;font-size:.8rem;color:var(--texto-suave);
}
.etiqueta{
  display:inline-flex;align-items:center;gap:6px;font-size:.74rem;font-weight:600;
  padding:3px 10px;border-radius:99px;background:var(--bg-elev2);border:1px solid var(--borde);
}
.etiqueta.cap{color:var(--acento);border-color:rgba(76,201,240,.3)}
.etiqueta.dur{color:var(--texto-suave)}
.subtitulo{font-size:1.05rem;color:var(--texto-suave);margin:4px 0 0;font-weight:400}

/* ---------- Bloques de código ---------- */
.bloque-codigo{margin:18px 0;border:1px solid var(--borde);border-radius:var(--r);overflow:hidden;background:var(--bg-codigo)}
.codigo-cab{
  display:flex;align-items:center;gap:8px;padding:7px 12px;
  background:rgba(255,255,255,.03);border-bottom:1px solid var(--borde);
  font-size:.72rem;color:var(--texto-tenue);font-family:var(--mono)}
.codigo-puntos{display:flex;gap:5px}
.codigo-puntos i{width:9px;height:9px;border-radius:50%;display:block}
.codigo-puntos i:nth-child(1){background:#ff5f57}
.codigo-puntos i:nth-child(2){background:#febc2e}
.codigo-puntos i:nth-child(3){background:#28c840}
.codigo-titulo{margin-left:4px}
.btn-copiar{
  margin-left:auto;background:var(--bg-elev2);border:1px solid var(--borde);
  color:var(--texto-suave);font-size:.7rem;padding:3px 9px;border-radius:6px;cursor:pointer;
  font-family:var(--fuente);
}
.btn-copiar:hover{color:var(--acento);border-color:var(--acento)}
.btn-copiar.ok{color:var(--exito);border-color:var(--exito)}
pre{margin:0;padding:14px 16px;overflow-x:auto}
pre code{font-family:var(--mono);font-size:.83rem;line-height:1.6;color:#cdd6e4;white-space:pre}
[data-tema="claro"] pre code{color:#dde3ec}
/* resaltado de sintaxis */
.cs-kw{color:#ff9d6b;font-weight:600}
.cs-tipo{color:#6fd0f0}
.cs-str{color:#9bd98a}
.cs-com{color:#6b7888;font-style:italic}
.cs-num{color:#f0c674}
.cs-fn{color:#d9b3f0}

/* ---------- Llamadas / callouts ---------- */
.nota{
  margin:18px 0;padding:14px 16px 14px 18px;border-radius:var(--r);
  background:var(--bg-elev);border:1px solid var(--borde);border-left:4px solid var(--texto-tenue);
}
.nota-tit{font-weight:700;font-size:.92rem;margin-bottom:5px;display:flex;align-items:center;gap:8px}
.nota p:first-child{margin-top:0}
.nota p:last-child{margin-bottom:0}
.nota.clave{border-left-color:var(--acento);background:rgba(76,201,240,.07)}
.nota.clave .nota-tit{color:var(--acento)}
.nota.info{border-left-color:var(--texto-suave)}
.nota.aviso{border-left-color:var(--aviso);background:rgba(244,201,93,.07)}
.nota.aviso .nota-tit{color:var(--aviso)}
.nota.historia{border-left-color:var(--acento2);background:rgba(244,162,97,.06)}
.nota.historia .nota-tit{color:var(--acento2)}

.puente{
  margin:22px 0;padding:16px 18px;border-radius:var(--r);
  background:linear-gradient(135deg,rgba(244,162,97,.1),rgba(244,162,97,.03));
  border:1px solid rgba(244,162,97,.32);
}
.puente-tit{
  display:flex;align-items:center;gap:8px;font-weight:700;color:var(--acento2);
  font-size:.82rem;text-transform:uppercase;letter-spacing:.6px;margin-bottom:6px}
.puente p:last-child{margin-bottom:0}

.cita{
  margin:18px 0;padding:6px 0 6px 20px;border-left:3px solid var(--acento);
  font-style:italic;color:var(--texto-suave)}
.cita .autor{display:block;font-style:normal;font-size:.8rem;color:var(--texto-tenue);margin-top:6px}

.resumen{
  margin:22px 0;padding:16px 18px;border-radius:var(--r);
  background:var(--bg-elev);border:1px solid var(--borde)}
.resumen-tit{font-weight:700;color:var(--acento);margin-bottom:8px;display:flex;align-items:center;gap:8px}
.resumen ul{margin:6px 0 0 20px}

/* ---------- Objetivos ---------- */
.objetivos{
  margin:18px 0;padding:16px 18px;border-radius:var(--r);
  background:var(--bg-elev);border:1px dashed var(--borde)}
.objetivos-tit{font-weight:700;margin-bottom:8px;display:flex;align-items:center;gap:8px}
.objetivos ul{list-style:none;margin:0}
.objetivos li{padding-left:24px;position:relative;margin:6px 0}
.objetivos li::before{content:"▸";position:absolute;left:4px;color:var(--acento)}

/* ---------- Ejercicios ---------- */
.ejercicio{
  margin:18px 0;border:1px solid var(--borde);border-radius:var(--r);overflow:hidden;
  background:var(--bg-elev)}
.ejercicio-cab{
  padding:12px 16px;background:rgba(244,162,97,.08);
  display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.ejercicio-cab .num{
  width:26px;height:26px;border-radius:7px;background:var(--acento2);color:#3a2207;
  font-weight:800;font-size:.82rem;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.ejercicio-cab .tit{font-weight:700;font-size:.95rem;flex:1;min-width:160px}
.nivel{font-size:.68rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px;
  padding:2px 8px;border-radius:99px}
.nivel.basico{background:rgba(91,217,154,.16);color:var(--exito)}
.nivel.medio{background:rgba(244,201,93,.16);color:var(--aviso)}
.nivel.reto{background:rgba(240,112,127,.16);color:var(--error)}
.ejercicio-cuerpo{padding:14px 16px}
.ejercicio-cuerpo p:first-child{margin-top:0}
details{margin:10px 0 0;border:1px solid var(--borde-suave);border-radius:8px;background:var(--bg-codigo)}
[data-tema="claro"] details{background:var(--bg-elev2)}
details summary{
  cursor:pointer;padding:9px 13px;font-size:.85rem;font-weight:600;color:var(--acento);
  list-style:none}
details summary::-webkit-details-marker{display:none}
details summary::before{content:"▸ ";font-size:.8em}
details[open] summary::before{content:"▾ "}
details .det-cuerpo{padding:0 13px 12px}
details .det-cuerpo p:first-child{margin-top:8px}

/* ---------- Tarjeta de proyecto ---------- */
.proyecto{
  margin:26px 0;border:1px solid rgba(76,201,240,.3);border-radius:14px;overflow:hidden;
  background:linear-gradient(160deg,rgba(76,201,240,.08),transparent 60%)}
.proyecto-cab{padding:18px 20px 6px}
.proyecto-cab .kicker{
  font-size:.74rem;font-weight:700;text-transform:uppercase;letter-spacing:.8px;color:var(--acento)}
.proyecto-cab h2{border:none;margin:6px 0 0;padding:0;font-size:1.3rem}
.proyecto-cuerpo{padding:6px 20px 20px}
.pasos{counter-reset:paso;list-style:none;margin:14px 0 0!important}
.pasos li{
  counter-increment:paso;position:relative;padding:10px 0 10px 44px;
  border-top:1px solid var(--borde-suave)}
.pasos li::before{
  content:counter(paso);position:absolute;left:0;top:9px;
  width:28px;height:28px;border-radius:8px;background:var(--bg-elev2);border:1px solid var(--borde);
  color:var(--acento);font-weight:800;font-size:.85rem;
  display:flex;align-items:center;justify-content:center}
.entregable{
  margin-top:14px;padding:12px 14px;border-radius:8px;
  background:var(--bg-elev);border:1px solid var(--borde);font-size:.9rem}

/* ---------- Cuestionario ---------- */
.quiz-pregunta{
  margin:18px 0;border:1px solid var(--borde);border-radius:var(--r);
  background:var(--bg-elev);padding:16px 18px}
.quiz-pregunta .pnum{font-size:.74rem;font-weight:700;color:var(--texto-tenue);letter-spacing:.5px}
.quiz-pregunta .ptexto{font-weight:600;margin:4px 0 12px}
.quiz-ops{display:flex;flex-direction:column;gap:8px}
.quiz-op{
  display:flex;align-items:flex-start;gap:10px;padding:10px 13px;border-radius:8px;
  border:1px solid var(--borde);background:var(--bg-codigo);cursor:pointer;transition:.12s;
  font-size:.92rem}
[data-tema="claro"] .quiz-op{background:var(--bg-elev2)}
.quiz-op:hover{border-color:var(--acento)}
.quiz-op .letra{
  flex-shrink:0;width:22px;height:22px;border-radius:6px;border:1px solid var(--borde);
  display:flex;align-items:center;justify-content:center;font-size:.78rem;font-weight:700;
  color:var(--texto-suave)}
.quiz-op.elegida{border-color:var(--acento)}
.quiz-op.elegida .letra{background:var(--acento);color:#04222e;border-color:var(--acento)}
.quiz-op.correcta{border-color:var(--exito);background:rgba(91,217,154,.1)}
.quiz-op.correcta .letra{background:var(--exito);color:#052;border-color:var(--exito)}
.quiz-op.incorrecta{border-color:var(--error);background:rgba(240,112,127,.1)}
.quiz-op.incorrecta .letra{background:var(--error);color:#330;border-color:var(--error)}
.quiz-op.bloqueada{cursor:default}
.quiz-exp{
  margin-top:10px;padding:10px 13px;border-radius:8px;font-size:.87rem;
  background:var(--bg-codigo);border-left:3px solid var(--acento);display:none}
[data-tema="claro"] .quiz-exp{background:var(--bg-elev2)}
.quiz-pregunta.respondida .quiz-exp{display:block}
.quiz-resultado{
  margin:24px 0;padding:22px;border-radius:14px;text-align:center;
  border:1px solid var(--borde);background:var(--bg-elev)}
.quiz-resultado .marca-grande{font-size:2.6rem;font-weight:800;font-variant-numeric:tabular-nums}
.quiz-resultado .marca-grande.bien{color:var(--exito)}
.quiz-resultado .marca-grande.regular{color:var(--aviso)}
.quiz-resultado .marca-grande.mal{color:var(--error)}

/* ---------- Botones ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;cursor:pointer;
  font-family:var(--fuente);font-size:.9rem;font-weight:600;
  padding:10px 18px;border-radius:9px;border:1px solid var(--borde);
  background:var(--bg-elev2);color:var(--texto);transition:.15s}
.btn:hover{border-color:var(--acento);text-decoration:none}
.btn.primario{background:var(--acento);color:#04222e;border-color:var(--acento)}
.btn.primario:hover{background:var(--acento-osc);border-color:var(--acento-osc);color:#04222e}
.btn.exito{background:var(--exito);color:#052;border-color:var(--exito)}
.btn.exito:hover{background:var(--exito-osc);border-color:var(--exito-osc)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.barra-acciones{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  margin-top:38px;padding-top:22px;border-top:1px solid var(--borde)}

/* ---------- Inicio / portada ---------- */
.hero{
  text-align:center;padding:30px 10px 14px}
.hero .voxel-deco{margin:0 auto 18px;display:block}
.hero h1{font-size:2.3rem;border:none;letter-spacing:-.6px}
.hero .lema{font-size:1.12rem;color:var(--texto-suave);max-width:560px;margin:10px auto 0}
.hero .para-quien{
  display:inline-block;margin-top:18px;padding:7px 16px;border-radius:99px;
  background:rgba(244,162,97,.12);border:1px solid rgba(244,162,97,.3);
  color:var(--acento2);font-size:.86rem;font-weight:600}
.rejilla{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));margin:22px 0}
.tarjeta{
  padding:16px 18px;border:1px solid var(--borde);border-radius:var(--r);background:var(--bg-elev)}
.tarjeta .ico{font-size:1.5rem}
.tarjeta h3{margin:8px 0 4px;font-size:1rem}
.tarjeta p{font-size:.88rem;color:var(--texto-suave);margin:0}

.modulo-tarjeta{
  display:flex;gap:14px;padding:16px 18px;margin:12px 0;
  border:1px solid var(--borde);border-radius:var(--r);background:var(--bg-elev);
  cursor:pointer;transition:.15s;text-align:left;width:100%;color:var(--texto);font-family:var(--fuente)}
.modulo-tarjeta:hover{border-color:var(--acento);transform:translateY(-1px);text-decoration:none}
.modulo-tarjeta.bloq{opacity:.62;cursor:default}
.modulo-tarjeta.bloq:hover{transform:none;border-color:var(--borde)}
.mt-num{
  flex-shrink:0;width:46px;height:46px;border-radius:11px;font-size:1.15rem;font-weight:800;
  display:flex;align-items:center;justify-content:center;
  background:var(--bg-elev2);color:var(--acento);border:1px solid var(--borde)}
.modulo-tarjeta.completo .mt-num{background:var(--exito);color:#052;border-color:transparent}
.mt-cuerpo{flex:1;min-width:0}
.mt-cuerpo h3{margin:0;font-size:1.02rem}
.mt-cuerpo .mt-lema{font-size:.82rem;color:var(--acento2);font-weight:600;margin:1px 0 4px}
.mt-cuerpo p{margin:0;font-size:.87rem;color:var(--texto-suave)}
.mt-meta{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px;font-size:.74rem;color:var(--texto-tenue)}
.mt-estado{
  flex-shrink:0;align-self:flex-start;font-size:.68rem;font-weight:700;text-transform:uppercase;
  letter-spacing:.5px;padding:3px 9px;border-radius:99px}
.mt-estado.list{background:rgba(91,217,154,.16);color:var(--exito)}
.mt-estado.prox{background:var(--bg-elev2);color:var(--texto-tenue)}

/* ---------- Glosario ---------- */
.glos-buscar{
  width:100%;padding:11px 14px;border-radius:9px;border:1px solid var(--borde);
  background:var(--bg-elev);color:var(--texto);font-family:var(--fuente);font-size:.95rem;margin:8px 0 18px}
.glos-buscar:focus{outline:none;border-color:var(--acento)}
.glos-item{
  margin:10px 0;padding:14px 16px;border:1px solid var(--borde);border-radius:var(--r);
  background:var(--bg-elev)}
.glos-item .termino{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.glos-item .en{font-weight:700;font-size:1rem;color:var(--acento)}
.glos-item .es{font-size:.9rem;color:var(--texto-suave)}
.glos-item .es::before{content:"· ES: ";color:var(--texto-tenue);font-size:.8rem}
.glos-item .def{margin-top:5px;font-size:.9rem}
.glos-item .modtag{font-size:.7rem;color:var(--texto-tenue);margin-top:6px;display:block}

/* ---------- Conceptos de ingeniería ---------- */
.ing-grupo{margin:30px 0 6px}
.ing-grupo-tit{
  display:flex;align-items:center;gap:10px;font-size:1.18rem;font-weight:700;
  padding-bottom:8px;border-bottom:1px solid var(--borde-suave);letter-spacing:-.2px}
.ing-concepto{
  margin:10px 0;padding:14px 16px;border:1px solid var(--borde);
  border-radius:var(--r);background:var(--bg-elev)}
.ing-concepto .ic-term{display:flex;align-items:baseline;gap:9px;flex-wrap:wrap}
.ing-concepto .ic-es{font-weight:700;font-size:1rem;color:var(--acento2)}
.ing-concepto .ic-en{font-size:.82rem;color:var(--texto-tenue);font-style:italic}
.ing-concepto .ic-def{margin-top:6px;font-size:.92rem}
.ing-concepto .ic-donde{
  font-size:.74rem;color:var(--texto-tenue);margin-top:8px;display:block}

/* ---------- Ruta SoloLattices ---------- */
.linea-tiempo{position:relative;margin:24px 0;padding-left:30px}
.linea-tiempo::before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;background:var(--borde)}
.hito{position:relative;margin:0 0 22px}
.hito::before{
  content:"";position:absolute;left:-28px;top:3px;width:18px;height:18px;border-radius:50%;
  background:var(--bg);border:3px solid var(--acento2)}
.hito.hecho::before{background:var(--exito);border-color:var(--exito)}
.hito h3{margin:0 0 3px;font-size:1.02rem}
.hito .hito-mod{font-size:.74rem;color:var(--acento2);font-weight:700;text-transform:uppercase;letter-spacing:.5px}
.hito p{margin:5px 0 0;font-size:.9rem;color:var(--texto-suave)}

/* ---------- Estado vacío / próximamente ---------- */
.proximo{
  text-align:center;padding:50px 20px;color:var(--texto-suave)}
.proximo .ico{font-size:3rem;display:block;margin-bottom:10px}

/* ---------- Vídeos ---------- */
.video-bloque{
  margin:20px 0;border:1px solid var(--borde);border-radius:var(--r);
  overflow:hidden;background:var(--bg-elev)}
.video-marco{
  position:relative;aspect-ratio:16/9;background:#05070c;cursor:pointer;overflow:hidden}
.video-thumb{width:100%;height:100%;object-fit:cover;display:block;opacity:.82;transition:.2s}
.video-marco:hover .video-thumb{opacity:1;transform:scale(1.03)}
.video-play{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:62px;height:62px;border-radius:50%;border:none;cursor:pointer;
  background:rgba(244,162,97,.95);color:#3a2207;font-size:1.35rem;padding-left:5px;
  display:flex;align-items:center;justify-content:center;transition:.15s;
  box-shadow:0 6px 20px rgba(0,0,0,.45)}
.video-marco:hover .video-play{background:var(--acento2);transform:translate(-50%,-50%) scale(1.08)}
.video-marco.activo{cursor:default}
.video-marco iframe{width:100%;height:100%;border:0;display:block}
.video-marco .video-cargando{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  color:var(--texto-suave);font-size:.85rem}
.video-info{padding:12px 15px}
.video-tit{font-weight:700;font-size:.95rem;line-height:1.35}
.video-meta{
  display:flex;flex-wrap:wrap;gap:7px 12px;align-items:center;margin-top:6px;
  font-size:.76rem;color:var(--texto-tenue)}
.vid-idioma{font-weight:700;padding:2px 8px;border-radius:99px;font-size:.67rem;letter-spacing:.3px}
.vid-idioma.es{background:rgba(91,217,154,.16);color:var(--exito)}
.vid-idioma.en{background:rgba(76,201,240,.16);color:var(--acento)}
.video-nota{
  margin-top:8px;font-size:.86rem;color:var(--texto-suave);
  border-top:1px solid var(--borde-suave);padding-top:8px}

/* ---------- Barras de progreso reutilizables ---------- */
.bprog{height:8px;background:var(--bg-elev2);border-radius:99px;overflow:hidden}
.bprog-relleno{height:100%;width:0;border-radius:99px;
  background:linear-gradient(90deg,var(--acento),var(--exito));transition:width .6s ease}
.bprog.grande{height:12px}

/* ---------- Panel de gamificación ---------- */
.panel-juego{
  display:flex;gap:18px;flex-wrap:wrap;margin:14px 0;padding:18px;
  border:1px solid var(--borde);border-radius:14px;
  background:linear-gradient(135deg,rgba(76,201,240,.09),rgba(244,162,97,.05))}
.pj-nivel{flex:1;min-width:240px}
.pj-nivel-info{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:8px;gap:10px}
.pj-nivel-nom{font-weight:800;font-size:1.1rem}
.pj-xp{font-weight:700;color:var(--acento);font-variant-numeric:tabular-nums;white-space:nowrap}
.pj-nivel-sig{margin-top:8px;font-size:.82rem;color:var(--texto-suave)}
.pj-stats{display:flex;gap:10px}
.pj-stat{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  min-width:80px;padding:10px;border-radius:10px;background:var(--bg-elev);border:1px solid var(--borde)}
.pj-num{font-size:1.2rem;font-weight:800;color:var(--acento2);font-variant-numeric:tabular-nums}
.pj-lab{font-size:.66rem;color:var(--texto-tenue);text-transform:uppercase;letter-spacing:.5px}

.insignias-fila{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:14px 0}
.insignia{
  width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  background:var(--bg-elev);border:1px solid var(--borde);font-size:1.15rem}
.insignia.bloqueada{opacity:.4;filter:grayscale(1)}
.insignias-ver{font-size:.82rem;font-weight:600;margin-left:6px}

/* progreso en tarjetas de módulo */
.mt-progreso{display:flex;align-items:center;gap:10px;margin-top:10px}
.mt-progreso .bprog{flex:1}
.mt-progreso-txt{font-size:.74rem;color:var(--texto-tenue);font-variant-numeric:tabular-nums;flex-shrink:0}
.modulo-progreso{
  margin:16px 0;padding:14px 16px;border:1px solid var(--borde);border-radius:var(--r);background:var(--bg-elev)}
.mp-cab{display:flex;justify-content:space-between;gap:10px;font-size:.82rem;
  color:var(--texto-suave);margin-bottom:8px;font-weight:600}

/* ---------- Niveles y logros ---------- */
.niveles-fila{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0}
.nivel-item{
  flex:1;min-width:120px;padding:10px 12px;border-radius:10px;border:1px solid var(--borde);
  background:var(--bg-elev);display:flex;flex-direction:column;gap:2px;opacity:.5}
.nivel-item.alcanzado{opacity:1}
.nivel-item.actual{border-color:var(--acento);background:rgba(76,201,240,.08)}
.nivel-n{font-size:.68rem;color:var(--texto-tenue);font-weight:700}
.nivel-nom{font-weight:700;font-size:.88rem;line-height:1.25}
.nivel-xp{font-size:.74rem;color:var(--texto-suave)}
.logros-rejilla{display:grid;gap:12px;grid-template-columns:repeat(auto-fill,minmax(255px,1fr));margin:14px 0}
.logro-card{
  display:flex;gap:12px;padding:14px;border:1px solid var(--borde);border-radius:var(--r);
  background:var(--bg-elev);align-items:flex-start}
.logro-card.bloqueado{opacity:.6}
.logro-ico{
  font-size:1.7rem;flex-shrink:0;width:46px;height:46px;border-radius:11px;
  display:flex;align-items:center;justify-content:center;background:var(--bg-elev2)}
.logro-card:not(.bloqueado) .logro-ico{
  background:linear-gradient(135deg,rgba(244,162,97,.28),rgba(76,201,240,.22))}
.logro-tit{font-weight:700;font-size:.95rem}
.logro-desc{font-size:.82rem;color:var(--texto-suave);margin:2px 0 5px}
.logro-meta{font-size:.72rem;color:var(--texto-tenue);font-weight:700}
.logro-card:not(.bloqueado) .logro-meta{color:var(--exito)}

/* ---------- Avisos de toast (logros) ---------- */
#toast-cap{position:fixed;right:18px;bottom:18px;z-index:60;display:flex;flex-direction:column;gap:10px}
.toast{
  display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:12px;max-width:340px;
  background:var(--bg-elev);border:1px solid var(--acento2);box-shadow:var(--sombra);
  transform:translateX(130%);transition:transform .45s cubic-bezier(.2,.85,.25,1)}
.toast.visible{transform:translateX(0)}
.toast-ico{font-size:1.9rem;flex-shrink:0}
.toast-tit{font-size:.7rem;font-weight:700;color:var(--acento2);text-transform:uppercase;letter-spacing:.6px}
.toast-nom{font-weight:700;font-size:.92rem;margin-top:2px}
.toast-xp{color:var(--acento);font-size:.82rem}

/* ---------- Errores típicos ---------- */
.errores-bloque{
  margin:22px 0;padding:14px 18px;border-radius:var(--r);
  background:rgba(240,112,127,.07);border:1px solid rgba(240,112,127,.28);
  border-left:4px solid var(--error)}
.errores-tit{font-weight:700;color:var(--error);margin-bottom:4px}
.errores-bloque ul{margin:6px 0 0 20px}
.errores-bloque li{margin:7px 0}
.nota.error{border-left-color:var(--error);background:rgba(240,112,127,.07)}
.nota.error .nota-tit{color:var(--error)}

/* ---------- Autoevaluación de repaso ---------- */
.repaso{margin:14px 0}
.repaso-q{
  margin:14px 0;padding:14px 16px;border:1px solid var(--borde);
  border-radius:var(--r);background:var(--bg-elev)}
.repaso-p{font-weight:600;margin-bottom:10px;display:flex;gap:9px;align-items:baseline}
.repaso-qn{
  flex-shrink:0;width:22px;height:22px;border-radius:6px;background:var(--bg-elev2);
  color:var(--acento);font-size:.76rem;font-weight:800;
  display:inline-flex;align-items:center;justify-content:center}
.repaso-ops{display:flex;flex-direction:column;gap:8px}
.repaso-op{
  display:flex;align-items:flex-start;gap:10px;padding:9px 12px;border-radius:8px;
  border:1px solid var(--borde);background:var(--bg-codigo);cursor:pointer;font-size:.9rem;
  font-family:var(--fuente);color:var(--texto);text-align:left;transition:.12s}
[data-tema="claro"] .repaso-op{background:var(--bg-elev2)}
.repaso-op:hover{border-color:var(--acento)}
.repaso-op .letra{
  flex-shrink:0;width:21px;height:21px;border-radius:6px;border:1px solid var(--borde);
  display:flex;align-items:center;justify-content:center;font-size:.74rem;font-weight:700;color:var(--texto-suave)}
.repaso-q.resuelta .repaso-op{cursor:default}
.repaso-op.ok{border-color:var(--exito);background:rgba(91,217,154,.13)}
.repaso-op.ok .letra{background:var(--exito);color:#052;border-color:var(--exito)}
.repaso-op.mal{border-color:var(--error);background:rgba(240,112,127,.13)}
.repaso-op.mal .letra{background:var(--error);color:#330;border-color:var(--error)}
.repaso-exp{
  display:none;margin-top:10px;padding:10px 12px;border-radius:8px;font-size:.86rem;
  background:var(--bg-codigo);border-left:3px solid var(--acento)}
[data-tema="claro"] .repaso-exp{background:var(--bg-elev2)}
.repaso-q.resuelta .repaso-exp{display:block}
.repaso-q.acierto .repaso-exp{border-left-color:var(--exito)}
.repaso-q.fallo .repaso-exp{border-left-color:var(--error)}

/* ---------- Notas personales ---------- */
.notas-area{
  width:100%;min-height:120px;padding:12px 14px;border-radius:var(--r);
  border:1px solid var(--borde);background:var(--bg-elev);color:var(--texto);
  font-family:var(--fuente);font-size:.92rem;line-height:1.6;resize:vertical}
.notas-area:focus{outline:none;border-color:var(--acento)}
.notas-estado{font-size:.76rem;color:var(--exito);margin-top:5px;height:16px;font-weight:600}

/* ---------- Prompts de IA ---------- */
.prompt-bloque{
  margin:14px 0;border:1px solid var(--borde);border-radius:var(--r);overflow:hidden;
  background:linear-gradient(135deg,rgba(199,155,224,.09),transparent)}
.prompt-cab{
  display:flex;align-items:center;justify-content:space-between;padding:8px 13px;
  background:rgba(255,255,255,.03);border-bottom:1px solid var(--borde);
  font-size:.78rem;font-weight:700;color:#c79be0}
.prompt-texto{
  padding:13px 15px;font-family:var(--mono);font-size:.82rem;line-height:1.65;
  white-space:pre-wrap;color:var(--texto-suave)}

/* ---------- Botón Probar / chuleta ---------- */
.btn-probar{
  background:var(--acento2);border:1px solid var(--acento2);color:#3a2207;
  font-size:.7rem;font-weight:700;padding:3px 9px;border-radius:6px;cursor:pointer;
  font-family:var(--fuente);white-space:nowrap}
.btn-probar:hover{background:var(--acento2-osc);border-color:var(--acento2-osc)}
.codigo-cab .btn-probar{margin-left:auto}
.codigo-cab .btn-copiar{margin-left:6px}
.chuleta-q{font-weight:600;margin:18px 0 -6px;color:var(--texto-suave);font-size:.92rem}

/* ---------- Empieza aquí (portada) ---------- */
.empieza-aqui{
  display:flex;align-items:center;gap:14px;margin:16px 0;padding:16px 18px;
  border-radius:14px;text-decoration:none;color:var(--texto);
  background:linear-gradient(135deg,rgba(244,162,97,.16),rgba(76,201,240,.08));
  border:1px solid rgba(244,162,97,.4);transition:.15s}
.empieza-aqui:hover{transform:translateY(-1px);border-color:var(--acento2);text-decoration:none}
.ea-ico{font-size:2rem;flex-shrink:0}
.ea-texto{flex:1;font-size:.9rem;color:var(--texto-suave);display:flex;flex-direction:column;gap:2px}
.ea-texto strong{color:var(--acento2);font-size:1rem}
.ea-flecha{font-size:1.4rem;color:var(--acento2);flex-shrink:0}

/* ---------- Prepara tu ordenador: checklist ---------- */
.setup-paso{
  margin:12px 0;border:1px solid var(--borde);border-radius:var(--r);
  background:var(--bg-elev);overflow:hidden}
.setup-paso.hecho{border-color:var(--exito)}
.setup-cab{display:flex;align-items:center;gap:11px;padding:12px 16px;cursor:pointer;user-select:none}
.setup-cab:hover{background:var(--bg-elev2)}
.setup-check{
  flex-shrink:0;width:24px;height:24px;border-radius:7px;border:2px solid var(--borde);
  display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:800;color:#052}
.setup-paso.hecho .setup-check{background:var(--exito);border-color:var(--exito)}
.setup-num{
  font-size:.7rem;font-weight:700;color:var(--texto-tenue);text-transform:uppercase;
  letter-spacing:.5px;flex-shrink:0}
.setup-tit{font-weight:700;font-size:.98rem}
.setup-paso.hecho .setup-tit{color:var(--texto-suave)}
.setup-cuerpo{padding:0 16px 14px 51px}
.setup-cuerpo p:first-child{margin-top:2px}
.setup-cuerpo pre{
  margin:10px 0;border:1px solid var(--borde);border-radius:8px;background:var(--bg-codigo)}
.setup-aparte{
  font-size:.85rem;color:var(--texto-suave);background:var(--bg-elev2);
  border-radius:8px;padding:9px 12px;margin-top:10px}

/* ---------- Terminal de práctica ---------- */
.term{
  margin:14px 0;border:1px solid var(--borde);border-radius:var(--r);overflow:hidden;
  background:#0a0e16;font-family:var(--mono)}
.term-barra{
  display:flex;align-items:center;gap:9px;padding:7px 12px;background:rgba(255,255,255,.04);
  border-bottom:1px solid var(--borde);font-size:.73rem;color:var(--texto-tenue)}
.term-salida{
  padding:12px 14px;min-height:120px;max-height:300px;overflow-y:auto;
  font-size:.83rem;line-height:1.6;color:#cdd6e4;white-space:pre-wrap;word-break:break-word}
.term-tenue{color:#6b7888;font-style:italic}
.term-eco{color:#e6edf3}
.term-ok{color:#5bd99a}
.term-err{color:#f0707f}
.term-linea{
  display:flex;align-items:center;padding:8px 14px;border-top:1px solid var(--borde);
  background:rgba(255,255,255,.02)}
.term-prompt{color:#5bd99a;font-size:.83rem;white-space:pre;flex-shrink:0}
.term-input{
  flex:1;background:none;border:none;outline:none;color:#e6edf3;
  font-family:var(--mono);font-size:.83rem;padding:2px 0;min-width:0}
.term-input::placeholder{color:#4a5568}

/* ---------- Diseñador de perfiles NACA ---------- */
.airfoil{
  margin:20px 0;border:1px solid var(--borde);border-radius:14px;overflow:hidden;
  background:linear-gradient(160deg,rgba(76,201,240,.09),transparent 62%)}
.airfoil-cab{
  padding:12px 16px;font-weight:700;font-size:.95rem;
  border-bottom:1px solid var(--borde-suave);background:rgba(255,255,255,.03)}
.airfoil-lienzo{padding:10px 14px 0}
#airfoil-svg{width:100%;height:auto;display:block}
.af-cuerda{stroke:var(--texto-tenue);stroke-width:1;stroke-dasharray:4 4}
.af-perfil{fill:rgba(76,201,240,.30);stroke:var(--acento);stroke-width:2;stroke-linejoin:round}
.af-camber{fill:none;stroke:var(--acento2);stroke-width:1.6;stroke-dasharray:5 4}
.af-punto{fill:var(--acento2)}
.af-etiq{fill:var(--texto-tenue);font-size:11px;font-family:var(--fuente)}
.airfoil-panel{
  display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;padding:6px 16px 10px}
.airfoil-codigo{font-family:var(--mono);font-weight:800;font-size:1.15rem;color:var(--acento)}
.airfoil-desc{font-size:.85rem;color:var(--texto-suave)}
.airfoil-controles{padding:4px 16px 14px;display:grid;gap:13px}
.af-ctrl label{
  display:flex;justify-content:space-between;font-size:.82rem;font-weight:600;
  color:var(--texto-suave);margin-bottom:5px}
.af-ctrl output{color:var(--acento);font-family:var(--mono);font-weight:700}
.af-ctrl input[type=range]{width:100%;accent-color:var(--acento);cursor:pointer}
.airfoil-pie{
  padding:10px 16px;border-top:1px solid var(--borde-suave);
  font-size:.82rem;color:var(--texto-tenue);font-style:italic}

/* ---------- Diploma ---------- */
.diploma{margin:18px 0;display:flex;justify-content:center}
.dip-marco{
  width:100%;max-width:620px;padding:34px 38px;text-align:center;
  background:var(--bg-elev);border:2px solid var(--acento2);border-radius:8px;
  box-shadow:0 0 0 6px var(--bg-elev), 0 0 0 7px var(--borde), var(--sombra)}
.dip-logo{display:flex;justify-content:center;margin-bottom:2px}
.dip-logo svg{width:58px;height:58px}
.dip-kicker{
  font-size:.74rem;text-transform:uppercase;letter-spacing:2.5px;
  color:var(--acento2);font-weight:700}
.dip-curso{font-size:1.95rem;font-weight:800;letter-spacing:-.5px;margin:6px 0 0}
.dip-sub{font-size:.95rem;color:var(--texto-suave);margin-bottom:14px}
.dip-texto{font-size:.9rem;color:var(--texto-suave);margin:8px 0;line-height:1.6}
.dip-nombre{
  font-size:1.7rem;font-weight:800;color:var(--acento);
  padding:6px 0;margin:6px 0;border-bottom:2px solid var(--borde);min-height:2.2rem}
.dip-modulos{
  font-size:.78rem;color:var(--texto-tenue);margin:16px 0 0;line-height:1.9;
  border-top:1px solid var(--borde-suave);padding-top:14px}
.dip-pie{
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;
  margin-top:16px;font-size:.73rem;color:var(--texto-tenue)}

/* ---------- Impresión (diploma) ---------- */
@media print{
  .barra-superior, .lateral, .velo-lateral, .pie, .migas, #toast-cap,
  #dip-nombre, .barra-acciones, .vista > h1, .vista > .subtitulo { display:none !important; }
  .disposicion, .principal { display:block; }
  .vista { max-width:100%; margin:0; padding:0; }
  .dip-marco{
    box-shadow:none; background:#fff; color:#1a2230;
    border-color:#c2710c; max-width:100%; }
  .dip-curso{ color:#1a2230; }
  .dip-nombre{ color:#0c7ca6; border-color:#d6dde6; }
  .dip-texto, .dip-sub, .dip-kicker { color:#55606f; }
}

/* ---------- Pantalla de acceso (perfiles) ---------- */
body.con-gate{ overflow:hidden; }
.gate{
  position:fixed; inset:0; z-index:1000;
  background:var(--bg);
  display:flex; align-items:center; justify-content:center;
  padding:32px 20px; overflow-y:auto;
}
.gate-matrix{
  position:absolute; inset:0; z-index:0;
  pointer-events:none; opacity:.55;
  /* Rain only on the right third, fading out toward the centre. */
  -webkit-mask-image:linear-gradient(90deg, transparent 0%, transparent 54%, #000 80%, #000 100%);
  mask-image:linear-gradient(90deg, transparent 0%, transparent 54%, #000 80%, #000 100%);
}
.gate-codigo{
  position:absolute; top:0; bottom:0; left:0; width:46%;
  z-index:0; overflow:hidden; pointer-events:none;
  opacity:.34;
  /* Code lines fade to black toward the centre and at top/bottom. */
  -webkit-mask-image:linear-gradient(90deg, #000 0%, #000 42%, transparent 96%);
  mask-image:linear-gradient(90deg, #000 0%, #000 42%, transparent 96%);
}
.gate-codigo pre{
  margin:0; padding:24px 28px;
  font-family:'JetBrains Mono', ui-monospace, monospace;
  font-size:.78rem; line-height:1.75;
  color:var(--acento);
  white-space:pre; text-align:left;
}
.gate-cursor{
  display:inline-block;
  width:.62em; height:1.05em;
  margin-left:1px; vertical-align:text-bottom;
  background:var(--acento);
  box-shadow:0 0 8px var(--acento);
}
.gate-tarjeta{
  position:relative; z-index:1;
  width:100%; max-width:460px;
  background:var(--bg-elev); border:1px solid var(--borde);
  border-radius:16px; box-shadow:var(--sombra);
  padding:38px 34px; text-align:center;
}
.gate-idioma{ position:absolute; top:14px; right:14px; display:flex; gap:4px; }
.gate-idioma-btn{
  background:var(--bg-elev2); border:1px solid var(--borde); color:var(--texto-suave);
  font-size:.72rem; font-weight:700; letter-spacing:.5px; padding:4px 9px;
  border-radius:6px; cursor:pointer; transition:.15s;
}
.gate-idioma-btn:hover{ border-color:var(--acento); color:var(--acento); }
.gate-idioma-btn.sel{ background:var(--acento); color:#fff; border-color:var(--acento); }
.gate-logo{ display:flex; justify-content:center; margin-bottom:4px; }
.gate-logo svg{ width:54px; height:54px; }
.gate-titulo{ font-size:1.5rem; margin:8px 0 2px; }
.gate-lema{
  font-size:.72rem; text-transform:uppercase; letter-spacing:1.2px;
  color:var(--texto-tenue); margin:0 0 20px;
}
.gate-sub{ color:var(--texto-suave); font-size:.95rem; margin:0 0 22px; line-height:1.5; }
.gate-perfiles{ display:flex; flex-direction:column; gap:10px; }
.gate-perfil{
  display:flex; align-items:center; gap:14px;
  width:100%; padding:13px 16px; text-align:left;
  background:var(--bg-elev2); border:1px solid var(--borde);
  border-radius:var(--r); cursor:pointer; color:var(--texto);
  font-size:.98rem; font-weight:600; font-family:var(--fuente);
  transition:border-color .15s, transform .05s;
}
.gate-perfil:hover{ border-color:var(--acento); }
.gate-perfil:active{ transform:scale(.99); }
.gate-perfil-av{
  font-size:1.45rem; width:42px; height:42px; flex-shrink:0;
  display:flex; align-items:center; justify-content:center;
  background:var(--bg); border-radius:50%;
}
.gate-perfil-nuevo{
  background:transparent; border-style:dashed;
  color:var(--texto-suave); font-weight:500;
}
.gate-perfil-nuevo:hover{ color:var(--acento); }
.gate-campo{
  display:block; text-align:left; font-size:.8rem; font-weight:600;
  color:var(--texto-suave); margin:16px 0 7px;
}
.gate-input{
  width:100%; box-sizing:border-box; padding:11px 14px;
  background:var(--bg-elev2); border:1px solid var(--borde);
  border-radius:var(--r); color:var(--texto); font-size:1rem; font-family:var(--fuente);
}
.gate-input:focus{ outline:none; border-color:var(--acento); }
.gate-input.error{ border-color:var(--error); }
.gate-avatares{ display:flex; flex-wrap:wrap; gap:8px; }
.gate-av{
  width:42px; height:42px; font-size:1.3rem; cursor:pointer;
  background:var(--bg-elev2); border:1.6px solid var(--borde); border-radius:10px;
  display:flex; align-items:center; justify-content:center; transition:border-color .12s;
}
.gate-av:hover{ border-color:var(--acento); }
.gate-av.sel{ border-color:var(--acento); background:rgba(76,201,240,.14); }
.gate-entrar{ width:100%; margin-top:20px; justify-content:center; }
.gate-pie{ margin-top:18px; }
.gate-enlace{
  background:none; border:none; cursor:pointer; padding:4px;
  color:var(--texto-suave); font-size:.85rem; font-family:var(--fuente);
  text-decoration:underline; text-underline-offset:3px;
}
.gate-enlace:hover{ color:var(--acento); }
.gate-aviso{
  display:flex; gap:12px; align-items:flex-start; text-align:left;
  background:var(--bg-elev2); border:1px solid var(--borde);
  border-radius:var(--r); padding:14px 16px; margin:4px 0 14px; line-height:1.55;
}
.gate-aviso p{ margin:0; font-size:.93rem; }
.gate-aviso-ico{ font-size:1.6rem; line-height:1; flex-shrink:0; }
.gate-aviso-ok{ border-color:var(--acento); }
.gate-error{
  color:var(--error); font-size:.88rem; text-align:left; margin:10px 0 0;
}
.perfil-editar{ margin:6px 0 4px; }
.perfil-ok{ color:var(--exito); }
.perfil-err{ color:var(--error); }

/* ---------- Panel de administración ---------- */
.admin-cargando{ color:var(--texto-suave); padding:18px 0; }
.admin-aviso{
  background:var(--bg-elev2); border:1px solid var(--borde); border-radius:var(--r);
  padding:18px 20px; color:var(--texto-suave); line-height:1.5;
}
.admin-resumen{
  display:grid; grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:14px; margin:18px 0;
}
.admin-tarjeta{
  background:var(--bg-elev); border:1px solid var(--borde); border-radius:var(--r);
  padding:16px 18px; text-align:center;
}
.admin-num{ font-size:1.9rem; font-weight:700; color:var(--acento); line-height:1.1; }
.admin-et{ font-size:.82rem; color:var(--texto-suave); margin-top:4px; }
.admin-barra-acc{ margin:6px 0 14px; }
.admin-tabla-env{ overflow-x:auto; border:1px solid var(--borde); border-radius:var(--r); }
.admin-tabla{ width:100%; border-collapse:collapse; font-size:.9rem; }
.admin-tabla th{
  text-align:left; padding:11px 14px; background:var(--bg-elev2);
  color:var(--texto-suave); font-size:.76rem; text-transform:uppercase;
  letter-spacing:.4px; border-bottom:1px solid var(--borde); white-space:nowrap;
}
.admin-tabla td{
  padding:11px 14px; border-bottom:1px solid var(--borde-suave); vertical-align:middle;
}
.admin-tabla tr:last-child td{ border-bottom:none; }
.admin-alumno{ display:flex; align-items:center; gap:10px; }
.admin-av{
  font-size:1.2rem; width:34px; height:34px; flex-shrink:0;
  display:flex; align-items:center; justify-content:center;
  background:var(--bg-elev2); border-radius:50%;
}
.admin-alumno-txt{ display:flex; flex-direction:column; min-width:0; }
.admin-alumno-nom{ font-weight:600; color:var(--texto); }
.admin-alumno-em{ font-size:.76rem; color:var(--texto-tenue); }
.admin-prog{ min-width:160px; }
.admin-prog-txt{ font-size:.78rem; color:var(--texto-suave); font-variant-numeric:tabular-nums; }
.bprog-admin{ margin-bottom:5px; }
.admin-xp{ font-weight:700; color:var(--acento); font-variant-numeric:tabular-nums; }
.admin-fecha{ color:var(--texto-suave); font-size:.84rem; white-space:nowrap; }

/* ---------- Perfil (barra lateral + página) ---------- */
.perfil-chip{
  display:flex; align-items:center; gap:11px;
  margin:2px 8px 10px; padding:10px 12px;
  background:var(--bg-elev2); border:1px solid var(--borde);
  border-radius:var(--r); cursor:pointer; transition:border-color .15s;
}
.perfil-chip:hover, .perfil-chip.activo{ border-color:var(--acento); }
.perfil-chip-av{
  font-size:1.2rem; width:38px; height:38px; flex-shrink:0;
  display:flex; align-items:center; justify-content:center;
  background:var(--bg); border-radius:50%;
}
.perfil-chip-info{ display:flex; flex-direction:column; min-width:0; }
.perfil-chip-nom{
  font-size:.92rem; font-weight:700; color:var(--texto);
  white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
}
.perfil-chip-meta{ font-size:.72rem; color:var(--texto-tenue); }
.perfil-cabecera{
  display:flex; align-items:center; gap:16px;
  margin:6px 0 4px; padding:16px 18px;
  background:var(--bg-elev); border:1px solid var(--borde); border-radius:var(--r);
}
.perfil-cab-av{
  font-size:2rem; width:64px; height:64px; flex-shrink:0;
  display:flex; align-items:center; justify-content:center;
  background:var(--bg-elev2); border-radius:50%;
}
.perfil-cab-nom{ font-size:1.3rem; font-weight:700; color:var(--texto); }
.perfil-cab-meta{ font-size:.85rem; color:var(--texto-suave); margin-top:2px; }
.perfil-nota{ font-size:.82rem; color:var(--texto-tenue); margin-top:10px; }

/* ---------- Responsivo ---------- */
@media(max-width:1040px){
  .vista{padding:30px 26px 56px}
}
@media(max-width:820px){
  #btn-menu{display:flex}
  .lateral{
    position:fixed;top:60px;left:0;z-index:35;transform:translateX(-100%);
    transition:transform .25s ease;box-shadow:var(--sombra)}
  .lateral.abierta{transform:translateX(0)}
  .velo-lateral.visible{
    display:block;position:fixed;inset:60px 0 0;background:rgba(0,0,0,.5);z-index:34}
  .marca-texto small{display:none}
  .vista{padding:24px 18px 50px}
  .vista h1{font-size:1.6rem}
  .hero h1{font-size:1.8rem}
}
@media(max-width:480px){
  .barra-progreso-global{min-width:90px}
  .cab-leccion{font-size:.74rem}
}