/* =====================================================================
   Tokens
   ===================================================================== */
:root {
  --fondo: #f5f6f8;
  --superficie: #ffffff;
  --superficie-2: #f0f2f5;
  --texto: #18202c;
  --suave: #5a6576;
  --borde: #e2e6ec;
  --borde-fuerte: #cfd5de;
  --acento: #2459d6;
  --acento-texto: #ffffff;
  --acento-suave: #e8eefc;
  --ok: #157a3a;
  --ok-suave: #e5f5ea;
  --fallo: #b8261d;
  --fallo-suave: #fcebe9;
  --aviso: #8f5300;
  --aviso-suave: #fff3df;
  --info: #1f5fae;
  --info-suave: #e7f0fb;
  --codigo-fondo: #f3f5f8;
  --sombra: 0 1px 2px rgba(16, 24, 40, .05), 0 1px 3px rgba(16, 24, 40, .06);
  --sombra-alta: 0 10px 30px rgba(16, 24, 40, .12);
  --lad-hilo: #8a94a3;
  --lad-on: #16a34a;
  --lampara: #f59e0b;
  --radio: 12px;
  --cab-alto: 60px;
  --side-ancho: 288px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --fondo: #0e131a;
    --superficie: #151b24;
    --superficie-2: #1c2430;
    --texto: #e5e9ef;
    --suave: #98a3b3;
    --borde: #27303c;
    --borde-fuerte: #364252;
    --acento: #6f9cff;
    --acento-texto: #0b1220;
    --acento-suave: #1a2742;
    --ok: #4cc77a;
    --ok-suave: #11291b;
    --fallo: #ff8078;
    --fallo-suave: #341614;
    --aviso: #f2b04f;
    --aviso-suave: #33240e;
    --info: #79aef5;
    --info-suave: #142236;
    --codigo-fondo: #10161e;
    --sombra: 0 1px 2px rgba(0, 0, 0, .3);
    --sombra-alta: 0 10px 30px rgba(0, 0, 0, .45);
    --lad-hilo: #5f6b7c;
    --lad-on: #4ade80;
    --lampara: #fbbf24;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --fondo: #0e131a;
  --superficie: #151b24;
  --superficie-2: #1c2430;
  --texto: #e5e9ef;
  --suave: #98a3b3;
  --borde: #27303c;
  --borde-fuerte: #364252;
  --acento: #6f9cff;
  --acento-texto: #0b1220;
  --acento-suave: #1a2742;
  --ok: #4cc77a;
  --ok-suave: #11291b;
  --fallo: #ff8078;
  --fallo-suave: #341614;
  --aviso: #f2b04f;
  --aviso-suave: #33240e;
  --info: #79aef5;
  --info-suave: #142236;
  --codigo-fondo: #10161e;
  --sombra: 0 1px 2px rgba(0, 0, 0, .3);
  --sombra-alta: 0 10px 30px rgba(0, 0, 0, .45);
  --lad-hilo: #5f6b7c;
  --lad-on: #4ade80;
  --lampara: #fbbf24;
  color-scheme: dark;
}

/* =====================================================================
   Base
   ===================================================================== */
* { box-sizing: border-box; }
html { scroll-padding-top: calc(var(--cab-alto) + 16px); }
body {
  margin: 0;
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  color: var(--texto);
  background: var(--fondo);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--acento); }
code, kbd, pre, textarea { font-family: ui-monospace, "Cascadia Code", Consolas, "SF Mono", monospace; }
h1, h2, h3 { line-height: 1.25; letter-spacing: -.01em; }
h1 { font-size: clamp(26px, 4vw, 36px); margin: 0 0 10px; }
h2 { font-size: 22px; margin: 0 0 14px; }
h3 { font-size: 17px; margin: 0 0 6px; }
:focus-visible { outline: 2px solid var(--acento); outline-offset: 2px; border-radius: 4px; }
.oculto { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.suave { color: var(--suave); }
.peq-txt { font-size: 14px; }
.ok-txt { color: var(--ok); font-weight: 600; }
.fallo-txt { color: var(--fallo); font-weight: 700; }
.vacio { color: var(--suave); padding: 24px 0; }
kbd {
  font-size: 12px;
  padding: 1px 6px;
  border: 1px solid var(--borde-fuerte);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: var(--superficie);
}

.saltar {
  position: absolute; left: 12px; top: -48px; z-index: 100;
  background: var(--acento); color: var(--acento-texto); padding: 8px 12px; border-radius: 8px;
}
.saltar:focus { top: 8px; }

/* =====================================================================
   Cabecera
   ===================================================================== */
.top {
  position: sticky; top: 0; z-index: 30;
  height: var(--cab-alto);
  display: flex; align-items: center; gap: 16px;
  padding: 0 16px;
  background: color-mix(in srgb, var(--superficie) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--borde);
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; color: var(--texto); text-decoration: none; white-space: nowrap;
  min-width: calc(var(--side-ancho) - 32px);
}
.logo-marca {
  display: grid; place-items: center; width: 30px; height: 30px; border-radius: 8px;
  background: var(--acento); color: var(--acento-texto);
}
.logo-sub { font-weight: 500; color: var(--suave); }

.buscador { position: relative; flex: 1; max-width: 520px; }
.buscador input {
  width: 100%; height: 38px; padding: 0 36px 0 36px;
  font: inherit; font-size: 15px; color: var(--texto);
  background: var(--superficie-2); border: 1px solid var(--borde); border-radius: 10px;
}
.buscador input:focus { outline: none; border-color: var(--acento); background: var(--superficie); box-shadow: 0 0 0 3px var(--acento-suave); }
.buscador .lupa { position: absolute; left: 11px; top: 11px; color: var(--suave); }
.buscador .atajo { position: absolute; right: 9px; top: 9px; color: var(--suave); }
.buscador input:focus ~ .atajo { display: none; }
.resultados-busqueda {
  position: absolute; top: 46px; left: 0; right: 0; z-index: 40;
  list-style: none; margin: 0; padding: 6px;
  max-height: 70vh; overflow: auto;
  background: var(--superficie); border: 1px solid var(--borde); border-radius: 12px; box-shadow: var(--sombra-alta);
}
.resultados-busqueda a {
  display: block; padding: 8px 10px; border-radius: 8px; color: var(--texto); text-decoration: none;
}
.resultados-busqueda li[aria-selected="true"] a, .resultados-busqueda a:hover { background: var(--acento-suave); }
.res-tipo { display: block; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--acento); }
.res-frag { display: block; font-size: 13px; color: var(--suave); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.resultados-busqueda mark { background: color-mix(in srgb, var(--lampara) 35%, transparent); color: inherit; border-radius: 2px; }
.res-vacio { padding: 12px; color: var(--suave); }

.top-acciones { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.icono-btn {
  display: grid; place-items: center; width: 38px; height: 38px;
  background: transparent; border: 1px solid transparent; border-radius: 10px; color: var(--texto); cursor: pointer;
}
.icono-btn:hover { background: var(--superficie-2); border-color: var(--borde); }
#btn-tema .luna { display: none; }
:root[data-theme="dark"] #btn-tema .sol { display: none; }
:root[data-theme="dark"] #btn-tema .luna { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) #btn-tema .sol { display: none; }
  :root:not([data-theme="light"]) #btn-tema .luna { display: block; }
}
.progreso-pill {
  display: flex; align-items: center; gap: 8px; height: 38px; padding: 0 12px 0 8px;
  border: 1px solid var(--borde); border-radius: 999px; color: var(--texto); text-decoration: none;
  font-size: 14px; font-weight: 600; font-variant-numeric: tabular-nums;
}
.progreso-pill:hover { background: var(--superficie-2); }
.anillo {
  --p: 0;
  display: inline-grid; place-items: center;
  width: 22px; height: 22px; border-radius: 50%;
  background: conic-gradient(var(--ok) calc(var(--p) * 1%), var(--borde) 0);
  -webkit-mask: radial-gradient(circle, transparent 54%, #000 56%);
  mask: radial-gradient(circle, transparent 54%, #000 56%);
}
.anillo.grande {
  width: 140px; height: 140px; -webkit-mask: none; mask: none; position: relative; flex: none;
}
.anillo.grande::before {
  content: ""; position: absolute; inset: 14px; border-radius: 50%; background: var(--superficie);
}
.anillo.grande span { position: relative; font-size: 28px; font-weight: 800; font-variant-numeric: tabular-nums; }
.solo-movil { display: none; }

/* =====================================================================
   Estructura
   ===================================================================== */
.layout { display: grid; grid-template-columns: var(--side-ancho) minmax(0, 1fr); }
.sidebar {
  position: sticky; top: var(--cab-alto);
  height: calc(100vh - var(--cab-alto));
  overflow-y: auto; padding: 16px 12px 40px;
  border-right: 1px solid var(--borde);
  background: var(--superficie);
  scrollbar-width: thin;
}
.vista { min-width: 0; padding: 28px 40px 64px; outline: none; }
.pagina { max-width: 860px; margin: 0 auto; }
.pagina.ancha { max-width: 1120px; }
.pagina.con-toc { max-width: 1120px; display: grid; grid-template-columns: minmax(0, 1fr) 220px; gap: 48px; }

.pie {
  margin-left: var(--side-ancho);
  padding: 24px 40px 40px;
  border-top: 1px solid var(--borde);
  font-size: 14px; color: var(--suave);
  display: grid; gap: 8px;
}
.pie strong { color: var(--texto); }
.pie-aviso { max-width: 860px; font-size: 13px; }

/* ---------- Barra lateral ---------- */
.side-grupo { display: grid; gap: 2px; margin-bottom: 8px; }
.side-titulo {
  margin: 18px 10px 8px; font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--suave);
}
.side-link {
  display: flex; align-items: center; gap: 10px;
  padding: 7px 10px; border-radius: 8px;
  color: var(--texto); text-decoration: none; font-size: 14.5px; line-height: 1.35;
}
.side-link:hover { background: var(--superficie-2); }
.side-link.activo { background: var(--acento-suave); color: var(--acento); font-weight: 600; }
.side-link svg { flex: none; color: var(--suave); }
.side-link.activo svg { color: var(--acento); }
.side-link .cuenta {
  margin-left: auto; font-size: 12px; padding: 0 7px; border-radius: 999px; background: var(--superficie-2); color: var(--suave);
}
.side-modulo { margin-bottom: 2px; }
.side-modulo summary {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px; border-radius: 8px; cursor: pointer; list-style: none;
  font-size: 14.5px; font-weight: 600;
}
.side-modulo summary::-webkit-details-marker { display: none; }
.side-modulo summary::after {
  content: ""; width: 7px; height: 7px; flex: none; margin-left: 4px;
  border-right: 2px solid var(--suave); border-bottom: 2px solid var(--suave);
  transform: rotate(-45deg); transition: transform .15s;
}
.side-modulo[open] summary::after { transform: rotate(45deg); }
.side-modulo summary:hover { background: var(--superficie-2); }
.side-modulo .num {
  display: grid; place-items: center; flex: none; width: 24px; height: 24px; border-radius: 7px;
  font-size: 12px; background: var(--superficie-2); color: var(--suave); border: 1px solid var(--borde);
}
.side-modulo.actual .num { background: var(--acento); color: var(--acento-texto); border-color: var(--acento); }
.side-modulo .nombre { flex: 1; }
.side-modulo .mini { font-size: 11px; font-weight: 600; color: var(--suave); font-variant-numeric: tabular-nums; }
.side-modulo .mini.completo { color: var(--ok); }
.side-modulo ul { list-style: none; margin: 2px 0 8px 22px; padding: 0 0 0 10px; border-left: 1px solid var(--borde); }
.side-modulo ul .side-link { font-size: 14px; padding: 5px 10px; color: var(--suave); }
.side-modulo ul .side-link:hover { color: var(--texto); }
.side-modulo ul .side-link.activo { color: var(--acento); }
.marca {
  display: grid; place-items: center; flex: none; width: 16px; height: 16px;
  border-radius: 50%; border: 1.5px solid var(--borde-fuerte); color: #fff;
}
.marca.ej { border-radius: 4px; }
.marca.test { border-radius: 4px; transform: rotate(45deg) scale(.85); }
.marca.test svg { transform: rotate(-45deg); }
.marca.hecho { background: var(--ok); border-color: var(--ok); color: var(--superficie); }
.marca svg { width: 10px; height: 10px; }

/* =====================================================================
   Componentes
   ===================================================================== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 40px; padding: 0 18px;
  background: var(--acento); color: var(--acento-texto);
  border: 1px solid var(--acento); border-radius: 10px;
  font: inherit; font-size: 15px; font-weight: 600; text-decoration: none; cursor: pointer;
  transition: filter .15s, background .15s;
}
.btn:hover { filter: brightness(1.07); }
.btn.sec { background: var(--superficie); color: var(--texto); border-color: var(--borde-fuerte); }
.btn.sec:hover { background: var(--superficie-2); filter: none; }
.btn.fantasma { background: transparent; color: var(--acento); border-color: transparent; }
.btn.fantasma:hover { background: var(--acento-suave); filter: none; }
.btn.peligro { background: var(--superficie); color: var(--fallo); border-color: var(--fallo); }
.btn.peligro:hover { background: var(--fallo-suave); filter: none; }
.btn.peq { height: 32px; padding: 0 12px; font-size: 14px; }
.btn:disabled { opacity: .55; cursor: default; filter: none; }

.chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 9px; border-radius: 999px;
  font-size: 12px; font-weight: 600; white-space: nowrap;
  background: var(--superficie-2); color: var(--suave); border: 1px solid var(--borde);
}
.chip.ok { background: var(--ok-suave); color: var(--ok); border-color: transparent; }
.chip.nivel-basico { background: var(--ok-suave); color: var(--ok); border-color: transparent; }
.chip.nivel-intermedio { background: var(--info-suave); color: var(--info); border-color: transparent; }
.chip.nivel-avanzado { background: var(--aviso-suave); color: var(--aviso); border-color: transparent; }

.barra { height: 6px; border-radius: 999px; background: var(--superficie-2); overflow: hidden; }
.barra span { display: block; height: 100%; border-radius: inherit; background: var(--ok); transition: width .4s; }

.migas { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; font-size: 14px; color: var(--suave); margin-bottom: 18px; }
.migas a { color: var(--suave); text-decoration: none; }
.migas a:hover { color: var(--acento); text-decoration: underline; }
.migas .sep { opacity: .5; }

.eyebrow {
  margin: 0 0 8px; font-size: 13px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--acento);
}
.lead { font-size: 18px; color: var(--suave); margin: 0 0 8px; max-width: 680px; }

.card {
  background: var(--superficie); border: 1px solid var(--borde); border-radius: var(--radio);
  padding: 20px; box-shadow: var(--sombra); min-width: 0;
}
.card-cab { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.card-titulo { font-size: 16px; margin: 0 0 10px; }
.card-cab .card-titulo { margin: 0; }

.caja { padding: 12px 14px; border-radius: 10px; margin: 14px 0 0; border: 1px solid transparent; }
.caja.ok { background: var(--ok-suave); color: var(--ok); }
.caja.fallo { background: var(--fallo-suave); color: var(--fallo); }
.caja.error { background: var(--aviso-suave); color: var(--aviso); }
.caja .marcador { margin-top: 10px; }
.caja.fallo .barra span { background: var(--fallo); }

.toast {
  position: fixed; left: 50%; bottom: 24px; z-index: 60;
  transform: translate(-50%, 20px); opacity: 0; pointer-events: none;
  background: var(--texto); color: var(--fondo);
  padding: 10px 16px; border-radius: 10px; font-weight: 600; font-size: 15px;
  box-shadow: var(--sombra-alta); transition: opacity .2s, transform .2s;
}
.toast.visible { opacity: 1; transform: translate(-50%, 0); }

.paginacion { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 40px; }
.pag {
  display: flex; align-items: center; gap: 12px; padding: 14px 16px;
  border: 1px solid var(--borde); border-radius: var(--radio); background: var(--superficie);
  color: var(--texto); text-decoration: none; font-weight: 600; min-width: 0;
}
.pag:hover { border-color: var(--acento); color: var(--acento); }
.pag span { min-width: 0; }
.pag small { display: block; font-size: 12px; font-weight: 500; color: var(--suave); }
.pag.sig { justify-content: flex-end; text-align: right; }
.pag svg { flex: none; }

.segmentado {
  display: inline-flex; padding: 3px; gap: 2px;
  background: var(--superficie-2); border: 1px solid var(--borde); border-radius: 10px;
}
.segmentado button {
  font: inherit; font-size: 14px; padding: 5px 12px; border: 0; border-radius: 7px;
  background: transparent; color: var(--suave); cursor: pointer;
}
.segmentado button[aria-pressed="true"] { background: var(--superficie); color: var(--texto); font-weight: 600; box-shadow: var(--sombra); }
.filtros { display: flex; flex-wrap: wrap; gap: 10px; margin: 18px 0 4px; }

.campo {
  width: 100%; height: 42px; padding: 0 14px;
  font: inherit; color: var(--texto); background: var(--superficie);
  border: 1px solid var(--borde-fuerte); border-radius: 10px;
}
.campo:focus { outline: none; border-color: var(--acento); box-shadow: 0 0 0 3px var(--acento-suave); }

.bloque { margin-top: 40px; }
.bloque-cab { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.bloque-cab h2 { margin: 0; }
.cab-seccion { margin-bottom: 8px; }
.acciones { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }

/* =====================================================================
   Inicio
   ===================================================================== */
.hero {
  display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: 40px; align-items: center;
  padding: 24px 0 8px;
}
.hero h1 { font-size: clamp(30px, 4.4vw, 46px); letter-spacing: -.02em; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.continuar {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  margin-top: 22px; padding: 12px 16px; max-width: 520px;
  border: 1px dashed var(--borde-fuerte); border-radius: var(--radio);
  color: var(--texto); text-decoration: none;
}
.continuar:hover { border-color: var(--acento); }
.continuar-et { width: 100%; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--suave); }
.continuar strong { flex: 1; }
.hero-demo {
  background: var(--superficie); border: 1px solid var(--borde); border-radius: 16px;
  box-shadow: var(--sombra-alta); overflow: hidden;
}
.demo-cab { display: flex; align-items: center; gap: 6px; padding: 10px 14px; border-bottom: 1px solid var(--borde); background: var(--superficie-2); }
.demo-cab span { width: 10px; height: 10px; border-radius: 50%; background: var(--borde-fuerte); }
.demo-cab em { margin-left: 8px; font-style: normal; font-size: 13px; color: var(--suave); font-family: ui-monospace, Consolas, monospace; }
.hero-demo pre { margin: 0; padding: 16px; font-size: 15px; background: var(--codigo-fondo); border-bottom: 1px solid var(--borde); overflow-x: auto; }
.tk-var { color: var(--acento); }
.tk-op { color: var(--aviso); font-weight: 700; }
.demo-ladder { padding: 12px; overflow-x: auto; }
.demo-ladder svg { display: block; margin: 0 auto; max-width: 100%; height: auto; }
.demo-ok { display: flex; align-items: center; gap: 8px; margin: 0 14px 14px; padding: 9px 12px; border-radius: 9px; background: var(--ok-suave); color: var(--ok); font-weight: 600; font-size: 14px; }

.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 36px;
}
.stat {
  padding: 16px; border: 1px solid var(--borde); border-radius: var(--radio); background: var(--superficie);
}
.stat strong { display: block; font-size: 28px; line-height: 1.1; font-variant-numeric: tabular-nums; }
.stat span { color: var(--suave); font-size: 14px; }

.grid-mod { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.tarjeta-mod {
  display: flex; flex-direction: column; gap: 6px;
  padding: 18px; border: 1px solid var(--borde); border-radius: var(--radio);
  background: var(--superficie); color: var(--texto); text-decoration: none; box-shadow: var(--sombra);
  transition: border-color .15s, transform .15s, box-shadow .15s;
}
.tarjeta-mod:hover { border-color: var(--acento); transform: translateY(-2px); box-shadow: var(--sombra-alta); }
.tarjeta-mod p { margin: 0 0 6px; color: var(--suave); font-size: 15px; flex: 1; }
.tarjeta-mod-num {
  font-size: 13px; font-weight: 800; color: var(--acento); font-variant-numeric: tabular-nums; letter-spacing: .04em;
}
.tarjeta-mod-num.grande {
  display: grid; place-items: center; flex: none; width: 64px; height: 64px; border-radius: 16px;
  font-size: 24px; background: var(--acento-suave);
}
.tarjeta-mod-meta { display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: 13px; color: var(--suave); margin-bottom: 8px; }
.tarjeta-mod-meta span { display: inline-flex; align-items: center; gap: 5px; }

.pasos { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.paso { padding: 18px; border-radius: var(--radio); background: var(--superficie-2); }
.paso p { margin: 0; color: var(--suave); font-size: 15px; }
.paso-num {
  display: grid; place-items: center; width: 30px; height: 30px; margin-bottom: 10px;
  border-radius: 50%; background: var(--acento); color: var(--acento-texto); font-weight: 700;
}

.grid-ej { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.tarjeta-ej {
  display: flex; flex-direction: column; gap: 6px;
  padding: 16px; border: 1px solid var(--borde); border-radius: var(--radio);
  background: var(--superficie); color: var(--texto); text-decoration: none;
  transition: border-color .15s, box-shadow .15s;
}
.tarjeta-ej:hover { border-color: var(--acento); box-shadow: var(--sombra-alta); }
.tarjeta-ej.resuelto { border-left: 3px solid var(--ok); }
.tarjeta-ej p { margin: 0; color: var(--suave); font-size: 14px; flex: 1;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.tarjeta-ej-cab { display: flex; gap: 6px; flex-wrap: wrap; }
.tarjeta-ej-pie { display: flex; justify-content: space-between; font-size: 12px; color: var(--suave); margin-top: 6px; }

/* =====================================================================
   Módulo
   ===================================================================== */
.cab-modulo { display: flex; gap: 20px; align-items: flex-start; }
.progreso-linea { display: flex; align-items: center; gap: 12px; margin-top: 12px; max-width: 420px; font-size: 14px; color: var(--suave); }
.progreso-linea .barra { flex: 1; }
.lista-temas { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.fila-tema, .fila-prog {
  display: flex; align-items: center; gap: 14px; padding: 14px 16px;
  border: 1px solid var(--borde); border-radius: var(--radio); background: var(--superficie);
  color: var(--texto); text-decoration: none;
}
.fila-tema:hover, .fila-prog:hover { border-color: var(--acento); }
.fila-num {
  display: grid; place-items: center; flex: none; min-width: 38px; height: 30px; padding: 0 6px; border-radius: 8px;
  background: var(--superficie-2); font-weight: 700; font-size: 14px; color: var(--suave); font-variant-numeric: tabular-nums;
}
.fila-titulo { flex: 1; font-weight: 600; }
.fila-titulo small, .fila-prog-txt small { display: block; font-weight: 400; font-size: 13px; color: var(--suave); }
.tarjeta-test {
  display: flex; align-items: center; gap: 14px; padding: 16px 18px; max-width: 480px;
  border: 1px solid var(--borde); border-radius: var(--radio); background: var(--superficie);
  color: var(--texto); text-decoration: none;
}
.tarjeta-test:hover { border-color: var(--acento); }
.tarjeta-test > svg:first-child { width: 28px; height: 28px; color: var(--acento); }
.tarjeta-test div { flex: 1; }
.tarjeta-test span { display: block; font-size: 14px; color: var(--suave); }

/* =====================================================================
   Apuntes
   ===================================================================== */
.cab-tema { padding-bottom: 18px; margin-bottom: 26px; border-bottom: 1px solid var(--borde); }
.cab-tema .meta { margin: 0; font-size: 14px; color: var(--suave); }
.contenido { font-size: 16.5px; line-height: 1.75; }
.contenido h2 { margin: 36px 0 12px; padding-top: 4px; font-size: 23px; }
.contenido h2:first-child { margin-top: 0; }
.contenido p, .contenido ul, .contenido ol { margin: 0 0 16px; }
.contenido li { margin-bottom: 6px; }
.contenido li::marker { color: var(--acento); }
.contenido :not(pre) > code {
  font-size: .88em; padding: 2px 6px; border-radius: 6px;
  background: var(--codigo-fondo); border: 1px solid var(--borde);
}
pre {
  position: relative; margin: 0 0 18px; padding: 16px 18px;
  font-size: 14.5px; line-height: 1.6;
  background: var(--codigo-fondo); border: 1px solid var(--borde); border-radius: 10px;
  overflow-x: auto;
}
pre code { font-size: inherit; }
.copiar {
  position: absolute; top: 8px; right: 8px;
  display: inline-flex; align-items: center; gap: 5px;
  padding: 4px 9px; font: inherit; font-family: system-ui, sans-serif; font-size: 12px;
  background: var(--superficie); color: var(--suave);
  border: 1px solid var(--borde); border-radius: 7px; cursor: pointer;
  opacity: 0; transition: opacity .15s;
}
pre:hover .copiar, .copiar:focus-visible { opacity: 1; }
@media (hover: none) { .copiar { opacity: 1; } }
.contenido table, .tabla-verdad {
  width: 100%; border-collapse: separate; border-spacing: 0; margin: 0 0 20px;
  font-size: 15px; border: 1px solid var(--borde); border-radius: 10px; overflow: hidden;
}
.contenido th, .contenido td, .tabla-verdad th, .tabla-verdad td {
  padding: 9px 12px; text-align: left; border-bottom: 1px solid var(--borde); vertical-align: top;
}
.contenido th, .tabla-verdad th { background: var(--superficie-2); font-weight: 700; font-size: 14px; }
.contenido tr:last-child td, .tabla-verdad tr:last-child td { border-bottom: 0; }
.contenido td code { white-space: nowrap; }
.contenido { overflow-wrap: anywhere; }
.contenido table { display: block; overflow-x: auto; }
@media (min-width: 700px) { .contenido table { display: table; } }

.nota {
  margin: 0 0 20px; padding: 14px 16px 14px 18px;
  border-radius: 10px; border-left: 4px solid; font-size: 15.5px;
}
.nota.info { background: var(--info-suave); border-color: var(--info); }
.nota.consejo { background: var(--ok-suave); border-color: var(--ok); }
.nota.aviso { background: var(--aviso-suave); border-color: var(--aviso); }
.nota strong:first-child { display: block; margin-bottom: 2px; }

.fin-tema {
  display: flex; flex-wrap: wrap; gap: 10px;
  margin-top: 36px; padding-top: 24px; border-top: 1px solid var(--borde);
}

.toc { position: sticky; top: calc(var(--cab-alto) + 28px); align-self: start; font-size: 14px; }
.toc p { margin: 0 0 10px; font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--suave); }
.toc ul { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--borde); }
.toc button {
  display: block; width: 100%; text-align: left; margin-left: -1px;
  padding: 5px 12px; font: inherit; font-size: 14px; color: var(--suave);
  background: none; border: 0; border-left: 2px solid transparent; cursor: pointer;
}
.toc button:hover { color: var(--texto); }
.toc li.activo button { color: var(--acento); border-left-color: var(--acento); font-weight: 600; }

/* =====================================================================
   Ejercicio
   ===================================================================== */
.cab-ej { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap; margin-bottom: 18px; }
.cab-ej h1 { margin: 0; }
.cab-ej-chips { display: flex; gap: 8px; }
.ej-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr); gap: 16px; align-items: start; }
.enunciado { white-space: pre-line; margin: 0 0 14px; }
.vars { display: grid; grid-template-columns: auto 1fr; gap: 6px 12px; margin: 0 0 16px; padding: 12px; border-radius: 10px; background: var(--superficie-2); font-size: 14px; }
.vars dt { font-weight: 700; color: var(--suave); }
.vars dd { margin: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.vars code { padding: 1px 7px; border-radius: 6px; background: var(--superficie); border: 1px solid var(--borde); }
.pistas ol { margin: 10px 0 0; padding-left: 22px; }
.pistas li { margin-bottom: 6px; padding: 8px 10px; border-radius: 8px; background: var(--aviso-suave); }
.pistas li::marker { color: var(--aviso); font-weight: 700; }
.solucion { margin-top: 14px; }
.solucion p { margin: 0 0 6px; font-size: 14px; }

.teclas { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.tecla {
  padding: 4px 9px; font-family: ui-monospace, Consolas, monospace; font-size: 13px; font-weight: 600;
  border: 1px solid var(--borde); border-radius: 7px; background: var(--superficie-2); color: var(--texto); cursor: pointer;
}
.tecla.var { color: var(--acento); }
.tecla.op { color: var(--aviso); }
.tecla:hover { border-color: var(--acento); }
textarea {
  display: block; width: 100%; min-height: 130px; padding: 14px;
  font-size: 15.5px; line-height: 1.6; color: var(--texto);
  background: var(--codigo-fondo); border: 1px solid var(--borde-fuerte); border-radius: 10px; resize: vertical;
  tab-size: 2;
}
textarea:focus { outline: none; border-color: var(--acento); box-shadow: 0 0 0 3px var(--acento-suave); }
.ayuda { font-size: 13.5px; color: var(--suave); margin: 8px 0 0; }
.ayuda code { font-size: 12.5px; }

.tabla-det { margin-top: 12px; }
.tabla-det summary { cursor: pointer; font-weight: 600; font-size: 14px; color: var(--suave); padding: 4px 0; }
.tabla-scroll { overflow-x: auto; margin-top: 8px; }
.tabla-verdad { font-size: 14px; }
.tabla-verdad th, .tabla-verdad td { text-align: center; padding: 6px 8px; font-variant-numeric: tabular-nums; }
.tabla-verdad tr.fila-fallo td { background: var(--fallo-suave); }
.bit { font-family: ui-monospace, Consolas, monospace; color: var(--suave); }
.bit.uno { color: var(--texto); font-weight: 700; }

.sim { margin-top: 16px; }
.sim-vacio {
  padding: 28px 16px; text-align: center; color: var(--suave);
  border: 1px dashed var(--borde-fuerte); border-radius: 10px;
}
.sim-vacio small { display: block; margin-top: 6px; color: var(--aviso); }
.sim-panel { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin: 12px 0 14px; }
.sim-entradas { display: flex; flex-wrap: wrap; gap: 8px; }
.interruptor {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 12px 7px 8px; border-radius: 10px;
  border: 1px solid var(--borde-fuerte); background: var(--superficie);
  font: inherit; font-size: 14px; color: var(--texto); cursor: pointer;
}
.interruptor:hover { border-color: var(--acento); }
.int-pista { position: relative; width: 34px; height: 20px; border-radius: 999px; background: var(--borde-fuerte); transition: background .15s; }
.int-bola { position: absolute; top: 2px; left: 2px; width: 16px; height: 16px; border-radius: 50%; background: #fff; box-shadow: 0 1px 2px rgba(0,0,0,.3); transition: left .15s; }
.interruptor.on .int-pista { background: var(--lad-on); }
.interruptor.on .int-bola { left: 16px; }
.int-nombre { font-family: ui-monospace, Consolas, monospace; font-weight: 700; }
.int-valor { font-family: ui-monospace, Consolas, monospace; color: var(--suave); }
.sim-flecha { color: var(--suave); }
.sim-salida { display: flex; align-items: center; gap: 10px; font-family: ui-monospace, Consolas, monospace; }
.lampara {
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--superficie-2); border: 2px solid var(--borde-fuerte); transition: all .2s;
}
.lampara.on { background: var(--lampara); border-color: var(--lampara); box-shadow: 0 0 18px var(--lampara); }
.ladder-wrap {
  overflow-x: auto; padding: 12px; border-radius: 10px;
  background: var(--codigo-fondo); border: 1px solid var(--borde);
}
.ladder { display: block; }
.lad-hilo, .lad-barra, .lad-contacto line, .lad-bobina path { stroke: var(--lad-hilo); stroke-width: 2; fill: none; stroke-linecap: round; }
.lad-barra { stroke-width: 3; }
.lad-hilo.on, .lad-barra.on { stroke: var(--lad-on); }
.lad-contacto.cerrado line { stroke: var(--lad-on); }
.lad-bobina.on path { stroke: var(--lad-on); stroke-width: 2.5; }
.lad-texto { fill: var(--texto); font: 600 11.5px ui-monospace, Consolas, monospace; text-anchor: middle; }
.lad-texto.fuerte { fill: var(--acento); font-size: 12.5px; }

/* =====================================================================
   Test
   ===================================================================== */
.test { margin-top: 20px; display: grid; gap: 14px; }
.pregunta {
  margin: 0; padding: 18px; border: 1px solid var(--borde); border-radius: var(--radio); background: var(--superficie);
}
.pregunta legend { display: flex; gap: 10px; float: left; width: 100%; margin-bottom: 12px; font-weight: 600; }
.pregunta legend + * { clear: both; }
.q-num {
  display: grid; place-items: center; flex: none; width: 26px; height: 26px; border-radius: 8px;
  font-size: 13px; background: var(--acento-suave); color: var(--acento);
}
.opcion {
  display: flex; align-items: center; gap: 10px; padding: 9px 12px; margin-top: 6px;
  border: 1px solid var(--borde); border-radius: 9px; cursor: pointer;
}
.opcion:hover { background: var(--superficie-2); }
.opcion input { accent-color: var(--acento); width: 17px; height: 17px; margin: 0; flex: none; }
.opcion.correcta { border-color: var(--ok); background: var(--ok-suave); }
.opcion.erronea { border-color: var(--fallo); background: var(--fallo-suave); }
.pregunta.bien { border-color: var(--ok); }
.pregunta.mal { border-color: var(--fallo); }
.explica { margin: 12px 0 0; font-size: 14.5px; color: var(--suave); }

/* =====================================================================
   Glosario y progreso
   ===================================================================== */
.letra { margin: 28px 0 8px; font-size: 18px; color: var(--acento); }
.glosario { margin: 0; display: grid; grid-template-columns: minmax(160px, 240px) 1fr; border-top: 1px solid var(--borde); }
.glosario dt, .glosario dd { padding: 10px 0; border-bottom: 1px solid var(--borde); margin: 0; }
.glosario dt { font-weight: 700; padding-right: 16px; }
.glosario dd { color: var(--suave); }

.resumen-prog { display: flex; align-items: center; gap: 28px; margin: 24px 0; flex-wrap: wrap; }
.resumen-prog > div:last-child { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; flex: 1; min-width: 260px; }
.lista-prog { display: grid; gap: 8px; }
.fila-prog-txt { flex: 1; min-width: 0; }
.fila-prog-barra { display: flex; align-items: center; gap: 10px; width: 180px; }
.fila-prog-barra .barra { flex: 1; }
.fila-prog-barra em { font-style: normal; font-size: 13px; color: var(--suave); width: 40px; text-align: right; font-variant-numeric: tabular-nums; }

/* =====================================================================
   Responsive
   ===================================================================== */
@media (max-width: 1200px) {
  .pagina.con-toc { grid-template-columns: minmax(0, 1fr); max-width: 860px; }
  .toc { display: none; }
}
@media (max-width: 1000px) {
  .hero { grid-template-columns: 1fr; }
  .ej-grid { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
  :root { --side-ancho: 300px; }
  .solo-movil { display: grid; }
  .logo { min-width: 0; }
  .logo-sub { display: none; }
  .layout { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed; top: var(--cab-alto); left: 0; bottom: 0; z-index: 25;
    width: min(var(--side-ancho), 86vw); height: auto;
    transform: translateX(-100%); transition: transform .2s ease;
    box-shadow: var(--sombra-alta);
  }
  body.menu-abierto .sidebar { transform: none; }
  .velo { position: fixed; inset: var(--cab-alto) 0 0 0; z-index: 20; background: rgba(0, 0, 0, .35); }
  .vista { padding: 22px 16px 48px; }
  .pie { margin-left: 0; padding: 24px 16px 32px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .pasos { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .top { gap: 8px; padding: 0 10px; }
  .logo > span:last-child { display: none; }
  .progreso-pill #texto-progreso { display: none; }
  .progreso-pill { padding: 0 8px; }
  .buscador .atajo { display: none; }
  .paginacion { grid-template-columns: 1fr; }
  .cab-modulo { flex-direction: column; }
  .glosario { grid-template-columns: 1fr; }
  .glosario dt { border-bottom: 0; padding-bottom: 0; }
  .fila-prog { flex-wrap: wrap; }
  .fila-prog-barra { width: 100%; }
  .resumen-prog > div:last-child { grid-template-columns: 1fr; }
  .grid-mod { grid-template-columns: 1fr; }
  .lead { font-size: 17px; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}