/* ══════════════════════════════════════════════════
   RUTA EDUCATIVA — SISTEMA DE DISEÑO COMPARTIDO

   Única fuente de verdad para las 15 páginas: tokens, base,
   tipografía, header, footer, FAQ y componentes comunes.
   Las secciones exclusivas de la portada viven en home.css.
══════════════════════════════════════════════════ */

/* ══════════════════════════════════════════════════
   TIPOGRAFÍAS AUTO-ALOJADAS

   Servidas desde el propio dominio: el sitio no hace ninguna
   petición a terceros, y se ahorran dos handshakes TLS en la
   ruta crítica.

   Instrument Sans es variable: un solo archivo cubre 400-600.
   El unicode-range es el original de Google, así que el navegador
   sigue bajando latin-ext solo si la página lo necesita.

   Ambas familias están bajo SIL Open Font License 1.1.
   Para regenerarlas: scratchpad/selfhost.py
══════════════════════════════════════════════════ */
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/ibm-plex-mono-400-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/ibm-plex-mono-400-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("fonts/ibm-plex-mono-500-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("fonts/ibm-plex-mono-500-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Instrument Sans';
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url("fonts/instrument-sans-400-600-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
}
@font-face {
  font-family: 'Instrument Sans';
  font-style: normal;
  font-weight: 400 600;
  font-display: swap;
  src: url("fonts/instrument-sans-400-600-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  color-scheme: light dark;

  /* ── superficies ── */
  --bg:        light-dark(oklch(0.98 0.004 260), oklch(0.17 0.014 260));
  --surface:   light-dark(#fff,                  oklch(0.215 0.016 260));
  --surface-2: light-dark(oklch(0.98 0.004 260), oklch(0.245 0.016 260));
  --header-bg: light-dark(oklch(0.98 0.004 260 / 0.82), oklch(0.17 0.014 260 / 0.82));

  /* ── texto ── */
  --ink:       light-dark(oklch(0.22 0.02 260), oklch(0.96 0.005 260));
  --ink-2:     light-dark(oklch(0.28 0.02 260), oklch(0.90 0.008 260));
  --ink-3:     light-dark(oklch(0.25 0.02 260), oklch(0.93 0.008 260));
  --muted:     light-dark(oklch(0.45 0.02 260), oklch(0.72 0.012 260));
  --muted-2:   light-dark(oklch(0.5 0.02 260),  oklch(0.68 0.012 260));
  /* muted-3 y muted-4 son los grises del texto MÁS pequeño (.eyebrow 11px,
     .label 10px). En claro se oscurecieron hasta pasar 4.5:1 sobre --bg y
     sobre #fff; en oscuro ya pasaban y se dejan como estaban. */
  --muted-3:   light-dark(oklch(0.525 0.02 260), oklch(0.645 0.012 260));
  --muted-4:   light-dark(oklch(0.545 0.02 260), oklch(0.625 0.012 260));

  /* ── marca ── */
  --brand:      light-dark(oklch(0.52 0.16 262), oklch(0.70 0.15 262));
  --brand-dark: light-dark(oklch(0.44 0.16 262), oklch(0.80 0.12 262));
  --brand-soft: light-dark(oklch(0.94 0.02 262), oklch(0.30 0.05 262));
  --brand-halo: light-dark(oklch(0.96 0.03 262), oklch(0.24 0.045 262));
  --brand-ink:  light-dark(oklch(0.42 0.12 262), oklch(0.84 0.10 262));
  --on-brand:   light-dark(#fff, oklch(0.16 0.04 262));

  /* ── líneas ── */
  --line:           light-dark(oklch(0.91 0.008 260), oklch(0.315 0.014 260));
  --line-2:         light-dark(oklch(0.94 0.006 260), oklch(0.275 0.014 260));
  --line-3:         light-dark(oklch(0.96 0.004 260), oklch(0.25 0.012 260));
  --line-4:         light-dark(oklch(0.93 0.006 260), oklch(0.295 0.014 260));
  --line-section:   light-dark(oklch(0.92 0.008 260), oklch(0.27 0.014 260));
  --line-dash:      light-dark(oklch(0.78 0.02 260),  oklch(0.40 0.02 260));
  --line-brand:     light-dark(oklch(0.88 0.03 262),  oklch(0.44 0.07 262));
  --line-brand-on:  light-dark(oklch(0.72 0.1 262),   oklch(0.52 0.11 262));
  --line-on-brand:  light-dark(oklch(0.62 0.13 262),  oklch(0.58 0.12 262));
  --btn-line:       light-dark(oklch(0.89 0.008 260), oklch(0.34 0.014 260));
  --btn-line-hover: light-dark(oklch(0.70 0.02 260),  oklch(0.52 0.02 260));
  --dot:            light-dark(oklch(0.85 0.01 260),  oklch(0.36 0.014 260));

  /* ── estado ── */
  --ok:      light-dark(oklch(0.52 0.11 160), oklch(0.74 0.13 160));
  --ok-soft: light-dark(oklch(0.72 0.13 160), oklch(0.78 0.14 160));
  --ok-bg:   light-dark(oklch(0.93 0.05 160), oklch(0.30 0.06 160));
  --ok-ink:  light-dark(oklch(0.42 0.11 160), oklch(0.84 0.12 160));
  --on-ok:   light-dark(#fff, oklch(0.16 0.03 160));
  --warn:    light-dark(oklch(0.55 0.14 40),  oklch(0.75 0.15 45));
  /* Escala de desempeño tal como la pinta el producto:
     Bajo (rojo) · Básico (ámbar) · Alto (azul de marca) · Superior (verde).
     Cada par ink/bg pasa 4.5:1 en los dos temas. */
  --warn-bg: light-dark(oklch(0.94 0.05 80),  oklch(0.33 0.07 70));
  --warn-ink:light-dark(oklch(0.44 0.13 70),  oklch(0.87 0.10 80));
  --bad:     light-dark(oklch(0.50 0.19 27),  oklch(0.70 0.17 27));
  --bad-bg:  light-dark(oklch(0.94 0.04 27),  oklch(0.32 0.09 27));
  --bad-ink: light-dark(oklch(0.44 0.17 27),  oklch(0.86 0.10 27));

  /* ── bloques de alto contraste (oscuros en ambos temas) ── */
  --dark:        light-dark(oklch(0.22 0.02 260), oklch(0.115 0.012 260));
  --dark-card:   light-dark(oklch(0.27 0.02 260), oklch(0.185 0.014 260));
  --dark-line:   light-dark(oklch(0.34 0.02 260), oklch(0.30 0.02 260));
  --dark-line-2: light-dark(oklch(0.32 0.02 260), oklch(0.26 0.02 260));
  --dark-text:   oklch(0.78 0.01 260);
  --rail-fill:   light-dark(oklch(0.22 0.02 260), oklch(0.90 0.008 260));

  /* ── sombras ── */
  --sh-c:       light-dark(oklch(0.4 0.06 262 / 0.6),  oklch(0.02 0.01 260 / 0.75));
  --sh-c-brand: light-dark(oklch(0.45 0.16 262 / 0.7), oklch(0.30 0.14 262 / 0.6));
  --sh-c-dark:  light-dark(oklch(0.3 0.06 262 / 0.7),  oklch(0.02 0.01 260 / 0.85));

  --sh-sm: 0 20px 40px -30px var(--sh-c);
  --sh-md: 0 30px 55px -40px var(--sh-c);
  --sh-lg: 0 40px 70px -44px var(--sh-c);
  --sh-xl: 0 50px 80px -50px var(--sh-c);
  --sh-dark: 0 30px 60px -34px var(--sh-c-dark);
}

:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"]  { color-scheme: dark; }

/* ══════════════════════════════════════════════════
   BASE
══════════════════════════════════════════════════ */
* { box-sizing: border-box; }
html { overflow-x: clip; }
/* El desplazamiento suave es una animación: solo para quien no pide lo contrario. */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Instrument Sans", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-wrap: pretty;
  overflow-x: clip;
}
a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-dark); }
h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -0.03em; }
p { margin: 0; }
button { font: inherit; }

.page { max-width: 100%; overflow-x: clip; }
.wrap { max-width: 1240px; margin: 0 auto; }
.mono { font-family: 'IBM Plex Mono', monospace; }

.eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-3);
}
.eyebrow--brand { color: var(--brand); }

/* Microetiqueta de las tarjetas y de las capturas de producto.
   Vive aquí y no en home.css porque la usan las 15 páginas. */
.label {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted-3);
}

.h2 {
  font-size: clamp(30px, 4vw, 50px);
  line-height: 1.05;
  letter-spacing: -0.03em;
}
.lead {
  font-size: 17px;
  line-height: 1.6;
  color: var(--muted);
}

section { padding: clamp(70px, 12vh, 140px) clamp(18px, 4vw, 40px); }

.btn {
  display: inline-block;
  font-size: 15px;
  font-weight: 500;
  padding: 15px 24px;
  border-radius: 12px;
  text-align: center;
  white-space: nowrap;
  cursor: pointer;
  transition: background .18s ease, border-color .18s ease, color .18s ease;
}
.btn--primary { background: var(--brand); color: var(--on-brand); border: 1px solid var(--brand); }
.btn--primary:hover { background: var(--brand-dark); border-color: var(--brand-dark); color: var(--on-brand); }
.btn--ghost { background: var(--surface); color: var(--ink-2); border: 1px solid var(--btn-line); }
.btn--ghost:hover { border-color: var(--btn-line-hover); color: var(--ink-2); }

/* Variantes para los bloques que son oscuros en AMBOS temas (.final, .calif).
   Ahí los tokens de superficie no sirven: los colores son literales a propósito. */
.btn--on-dark { background: #fff; color: var(--dark); border: 1px solid #fff; }
.btn--on-dark:hover { background: oklch(0.92 0.01 260); border-color: oklch(0.92 0.01 260); color: var(--dark); }
/* Borde a 0.55 y no más bajo: por debajo de ~0.51 el contorno del botón cae
   por debajo de 3:1 sobre --dark y falla WCAG 1.4.11 (contraste no textual). */
.btn--on-dark-ghost { background: transparent; color: #fff; border: 1px solid oklch(0.55 0.02 260); }
.btn--on-dark-ghost:hover { border-color: oklch(0.72 0.02 260); color: #fff; }
.btn--on-dark:focus-visible,
.btn--on-dark-ghost:focus-visible { outline: 2px solid #fff; outline-offset: 3px; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
}

::selection { background: var(--brand-soft); color: var(--ink); }

@media (prefers-reduced-motion: reduce) { * { animation: none !important; } }

:root.theme-switching,
:root.theme-switching *,
:root.theme-switching *::before,
:root.theme-switching *::after {
  transition: background-color .28s ease, border-color .28s ease,
              color .28s ease, box-shadow .28s ease, fill .28s ease !important;
}
@media (prefers-reduced-motion: reduce) {
  :root.theme-switching, :root.theme-switching * { transition: none !important; }
}

/* ══════════════════════════════════════════════════
   SALTAR AL CONTENIDO
   Primer elemento enfocable de la página. Fuera de la
   pantalla hasta que recibe el foco por teclado.
══════════════════════════════════════════════════ */
/* fixed, no absolute: absolute lo ancla al documento y, con la página
   desplazada, el enlace aparece por encima del viewport y no se ve. */
.skip-link {
  position: fixed;
  left: -9999px;
  top: 0;
  z-index: 100;
  padding: 13px 20px;
  border-radius: 0 0 12px 0;
  background: var(--brand);
  color: var(--on-brand);
  font-size: 15px;
  font-weight: 500;
}
.skip-link:focus {
  left: 0;
  color: var(--on-brand);
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

/* El ancla del skip link recibe el foco por programa: sin anillo visible,
   porque el usuario ya sabe dónde aterrizó. */
main:focus { outline: none; }

/* ══════════════════════════════════════════════════
   HEADER
══════════════════════════════════════════════════ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: var(--header-bg);
  border-bottom: 1px solid var(--line);
}
.site-header__bar {
  max-width: 1240px;
  margin: 0 auto;
  padding: 14px clamp(16px, 4vw, 40px);
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand { display: flex; align-items: center; gap: 10px; color: var(--ink); }
.brand:hover { color: var(--ink); }
.brand span { font-weight: 600; letter-spacing: -0.02em; font-size: 17px; }

.brand__logo { width: 28px; height: 28px; display: block; flex: 0 0 auto; }
@supports ((mask-image: url("../redu.svg")) or (-webkit-mask-image: url("../redu.svg"))) {
  .brand__logo {
    background: var(--ink);
    opacity: .85;
    -webkit-mask: url("../redu.svg") center / contain no-repeat;
    mask: url("../redu.svg") center / contain no-repeat;
  }
}

.site-nav { display: flex; gap: 22px; margin-left: auto; align-items: center; flex-wrap: wrap; justify-content: flex-end; }
.site-nav a { font-size: 14px; color: var(--muted); }
.site-nav a:hover { color: var(--ink); }

/* Sección actual. El subrayado no es decorativo: el color por sí solo no
   puede ser el único indicador (WCAG 1.4.1). */
.site-nav a.is-current {
  color: var(--ink);
  font-weight: 500;
  text-decoration: underline;
  text-decoration-color: var(--brand);
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}
.menu-panel a.is-current {
  color: var(--ink);
  font-weight: 500;
  box-shadow: inset 2px 0 0 var(--brand);
  padding-left: 12px;
}

.header-actions { display: flex; align-items: center; gap: 10px; }

/* Separa la navegación del bloque de acciones. Se oculta junto con
   .site-nav: sin enlaces a la izquierda no separa nada. */
.header-sep { width: 1px; height: 20px; background: var(--line); flex: 0 0 auto; }

.menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 46px;
  height: 44px;
  min-height: 44px;
  border-radius: 12px;
  border: 1px solid var(--btn-line);
  background: var(--surface);
  cursor: pointer;
  flex-direction: column;
}
.menu-btn span { display: block; width: 18px; height: 1.5px; background: var(--ink-2); }

.theme-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 12px;
  border: 1px solid var(--btn-line);
  background: var(--surface);
  color: var(--ink-2);
  cursor: pointer;
  transition: border-color .2s ease, color .2s ease, background .2s ease;
}
.theme-btn:hover { border-color: var(--btn-line-hover); color: var(--ink); }
.theme-btn:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
.theme-btn svg { width: 18px; height: 18px; display: block; }
.theme-btn .i-sun { display: none; }
:root[data-scheme="dark"] .theme-btn .i-sun  { display: block; }
:root[data-scheme="dark"] .theme-btn .i-moon { display: none; }

.menu-panel {
  display: none;
  border-top: 1px solid var(--line);
  background: var(--bg);
  padding: 10px clamp(16px, 4vw, 40px) 20px;
}
.menu-panel a {
  display: block;
  font-size: 16px;
  color: var(--ink-2);
  padding: 13px 4px;
  border-bottom: 1px solid var(--line-2);
}
.menu-panel a:last-child { border-bottom: none; }
.site-header.is-open .menu-panel { display: grid; }

/* ══════════════════════════════════════════════════
   MIGA DE PAN
══════════════════════════════════════════════════ */
.breadcrumb {
  max-width: 1240px;
  margin: 0 auto;
  padding: 20px clamp(18px, 4vw, 40px) 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted-3);
}
.breadcrumb a { color: var(--muted-3); }
.breadcrumb a:hover { color: var(--brand); }
.breadcrumb span[aria-current] { color: var(--muted); }

/* ══════════════════════════════════════════════════
   ARTÍCULO / GUÍA — encabezado
══════════════════════════════════════════════════ */
.article-hero { padding-top: clamp(30px, 6vh, 60px); padding-bottom: clamp(40px, 7vh, 76px); }
.article-hero__inner { max-width: 780px; margin: 0 auto; }
.article-hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.06;
  letter-spacing: -0.03em;
  margin: 16px 0 18px;
  text-wrap: balance;
}
.article-hero .lead { font-size: clamp(17px, 1.6vw, 19px); max-width: 62ch; }
.article-meta { display: flex; flex-wrap: wrap; gap: 10px 18px; margin-top: 22px; font-size: 13px; color: var(--muted-3); }

/* ══════════════════════════════════════════════════
   ARTÍCULO / GUÍA — cuerpo (prosa)
══════════════════════════════════════════════════ */
.article-body { padding-top: 0; padding-bottom: clamp(40px, 7vh, 70px); }
.article-body__inner {
  max-width: 1240px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 260px);
  gap: clamp(30px, 5vw, 64px);
  align-items: start;
}
.prose { max-width: 68ch; }
.prose > * + * { margin-top: 18px; }
.prose h2 {
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--line-section);
}
.prose > h2:first-child { margin-top: 0; padding-top: 0; border-top: none; }
.prose h3 { font-size: 18px; letter-spacing: -0.015em; margin-top: 30px; }
.prose p { font-size: 16px; line-height: 1.7; color: var(--ink-2); }
.prose ul, .prose ol { margin: 0; padding-left: 22px; display: grid; gap: 10px; }
.prose li { font-size: 16px; line-height: 1.6; color: var(--ink-2); }
.prose li::marker { color: var(--muted-3); }
.prose strong { color: var(--ink); font-weight: 600; }
.prose a { text-decoration: underline; text-decoration-color: var(--line-brand-on); text-underline-offset: 3px; }
/* Un botón dentro del texto sigue siendo un botón: el subrayado de los
   enlaces de prosa no debe alcanzarlo. */
.prose a.btn { text-decoration: none; }

.callout {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px 24px;
}
.callout .label { margin-bottom: 8px; }
.callout p { color: var(--ink-2); }

.criteria-list { display: grid; gap: 14px; }
.criteria-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px 20px;
}
.criteria-item .name { font-size: 15px; font-weight: 600; color: var(--ink); margin-bottom: 6px; }
.criteria-item p { font-size: 14px; line-height: 1.6; color: var(--muted); margin: 0; }

.article-cta {
  background: var(--dark);
  color: #fff;
  border-radius: 20px;
  padding: 32px 30px;
  margin-top: 40px;
}
.article-cta .eyebrow { color: oklch(0.75 0.09 262); }
.article-cta h3 { font-size: clamp(20px, 2.4vw, 26px); letter-spacing: -0.02em; margin: 10px 0 10px; color: #fff; }
.article-cta p { color: var(--dark-text); font-size: 14px; line-height: 1.6; margin-bottom: 18px; }

/* ── Barra lateral ── */
.article-aside { display: grid; gap: 20px; align-content: start; position: sticky; top: 90px; }
.aside-card { background: var(--surface); border: 1px solid var(--line); border-radius: 16px; padding: 20px; }
.aside-card .label { margin-bottom: 12px; }
.aside-card nav { display: grid; gap: 9px; }
.aside-card nav a { font-size: 13px; color: var(--muted-2); line-height: 1.4; }
.aside-card nav a:hover { color: var(--brand); }
.related-list { display: grid; gap: 14px; }
.related-list a { display: block; font-size: 13.5px; font-weight: 500; color: var(--ink-2); line-height: 1.4; }
.related-list a:hover { color: var(--brand); }
.related-list p { font-size: 12.5px; color: var(--muted-3); margin-top: 4px; font-weight: 400; }

/* Reutiliza el componente de acordeón del FAQ del home */
.faq .wrap {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.6fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
}
.faq__intro { max-width: 620px; position: sticky; top: 100px; }
.faq__intro h2 { margin: 18px 0 12px; }
.faq__groups { display: grid; gap: 30px; }
.faq__group-title {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted-3);
  margin-bottom: 14px;
}
.faq__list { display: grid; gap: 12px; }

.faq-item {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.faq-item:hover { border-color: var(--btn-line-hover); }
.faq-item[open] { border-color: var(--line-brand); box-shadow: var(--sh-sm); }
.faq-item summary {
  list-style: none;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 17px 20px;
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.45;
  color: var(--ink-2);
  cursor: pointer;
  border-radius: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--ink); }
.faq-item summary:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; }
.faq-item__icon {
  order: -1;
  position: relative;
  width: 28px;
  height: 28px;
  margin-top: -2px;
  border-radius: 50%;
  background: var(--brand-soft);
  flex: 0 0 auto;
  transition: background .2s ease;
}
.faq-item__icon::before, .faq-item__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--brand);
  translate: -50% -50%;
  transition: rotate .2s ease, opacity .2s ease, background .2s ease;
}
.faq-item__icon::before { width: 11px; height: 1.6px; }
.faq-item__icon::after  { width: 1.6px; height: 11px; }
.faq-item[open] summary { color: var(--ink); }
.faq-item[open] .faq-item__icon { background: var(--brand); }
.faq-item[open] .faq-item__icon::before { background: var(--on-brand); }
.faq-item[open] .faq-item__icon::after { rotate: 90deg; opacity: 0; }
.faq-item__body { padding: 0 20px 18px 62px; }
/* Mientras se cierra, el icono y el borde vuelven a su sitio desde el
   primer momento: el atributo [open] no se quita hasta que termina la
   animación de altura, así que este estado cubre ese intervalo. */
.faq-item.is-closing { border-color: var(--line); box-shadow: none; }
.faq-item.is-closing .faq-item__icon { background: var(--brand-soft); }
.faq-item.is-closing .faq-item__icon::before { background: var(--brand); }
.faq-item.is-closing .faq-item__icon::after { rotate: 0deg; opacity: 1; }
.faq-item__body p { font-size: 14px; line-height: 1.6; color: var(--muted); max-width: 60ch; }

/* ── Cierre de la sección ── */
.faq__more {
  background: var(--brand-halo);
  border: 1px solid var(--line-brand);
  border-radius: 16px;
  padding: 26px 24px;
  text-align: center;
}
.faq__more .name { font-size: 18px; font-weight: 600; letter-spacing: -0.01em; color: var(--ink); }
.faq__more p { margin-top: 8px; font-size: 14px; line-height: 1.6; color: var(--muted); }
.faq__more-actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 18px; }
.faq__more-actions .btn { font-size: 14px; padding: 12px 20px; }

@media (max-width: 899px) {
  .faq .wrap { grid-template-columns: 1fr; }
  .faq__intro { position: static; margin-bottom: clamp(22px, 4vh, 38px); }
}
@media (max-width: 639px) {
  .faq-item summary { padding: 15px 16px; gap: 12px; font-size: 15px; }
  .faq-item__body { padding: 0 16px 16px 56px; }
}

/* ══════════════════════════════════════════════════
   FOOTER
══════════════════════════════════════════════════ */
/* ══════════════════════════════════════════════════
   FOOTER
   Bloque de alto contraste: oscuro en AMBOS temas, por lo
   que sus colores internos son literales a propósito.
══════════════════════════════════════════════════ */
.site-footer {
  padding: clamp(46px, 6vw, 72px) clamp(18px, 4vw, 40px) 26px;
  background: var(--dark);
  color: oklch(0.72 0.01 260);
  border-top: 1px solid oklch(0.3 0.02 260);
}
.site-footer__inner { max-width: 1240px; margin: 0 auto; }
:where(.site-footer) a { color: inherit; }
.site-footer a:focus-visible { outline: 2px solid #fff; outline-offset: 3px; border-radius: 8px; }

/* ── Columnas ── */
.footer-main {
  display: grid;
  grid-template-columns: minmax(230px, 1.35fr) repeat(4, minmax(120px, 1fr));
  gap: clamp(28px, 3vw, 40px);
  padding: 0 0 clamp(30px, 4vw, 42px);
}
.footer-brand { max-width: 330px; }
.footer-brand .brandline {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 600;
  font-size: 15.5px;
  letter-spacing: -0.01em;
}
.footer-brand .brandline img { width: 24px; height: 24px; filter: brightness(0) invert(1); opacity: .9; }
.footer-brand p { margin-top: 14px; font-size: 13.5px; line-height: 1.6; color: oklch(0.68 0.012 260); }

.footer-social { display: flex; gap: 10px; margin: 22px 0 0; padding: 0; list-style: none; }
.footer-social a {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 11px;
  border: 1px solid oklch(0.34 0.02 260);
  color: oklch(0.78 0.01 260);
  transition: background .18s ease, border-color .18s ease, color .18s ease;
}
.footer-social a:hover { background: oklch(0.3 0.02 260); border-color: oklch(0.48 0.02 260); color: #fff; }
.footer-social svg { width: 17px; height: 17px; }

.footer-col__title {
  margin: 0 0 15px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: oklch(0.6 0.012 260);
}
.footer-col ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 11px; }
.footer-col li { font-size: 13.5px; line-height: 1.45; }
.footer-col a { color: oklch(0.78 0.01 260); }
.footer-col a:hover { color: #fff; }
.footer-col--contacto .muted { color: oklch(0.6 0.012 260); }

/* ── Barra inferior ── */
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding-top: 24px;
  border-top: 1px solid oklch(0.3 0.02 260);
  font-size: 12.5px;
  color: oklch(0.62 0.012 260);
}
.footer-bottom .by { display: inline-flex; align-items: center; gap: 8px; }
.footer-bottom .by img { height: 15px; filter: brightness(0) invert(1); opacity: .5; }
.footer-bottom .claim {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.footer-bottom .legal-links { display: flex; flex-wrap: wrap; gap: 8px 18px; }
.footer-bottom .legal-links a {
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: oklch(0.4 0.02 260);
}
.footer-bottom .legal-links a:hover { color: #fff; text-decoration-color: currentColor; }

@media (max-width: 1099px) {
  .footer-main { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .footer-brand { grid-column: 1 / -1; max-width: 560px; }
}
@media (max-width: 639px) {
  .footer-main { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 30px 18px; }
  .footer-social a { width: 44px; height: 44px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* ══════════════════════════════════════════════════
   GUÍAS (tarjetas de enlace — home y 404)
══════════════════════════════════════════════════ */
.guias__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
  gap: 16px;
}
.guia-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 22px;
  color: var(--ink);
  transition: border-color .2s ease, transform .2s ease;
}
.guia-card:hover { border-color: var(--btn-line-hover); color: var(--ink); transform: translateY(-2px); }
.guia-card .name { font-size: 15px; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 6px; }
.guia-card p { font-size: 13.5px; color: var(--muted-2); line-height: 1.5; }

/* Variante de los índices (hubs): la tarjeta lleva etiqueta de categoría
   encima y el título pesa más. Sustituye a los style="" que repetían
   font-size:17px y margin-bottom:8px en cada tarjeta. */
.guia-card--labeled .label { margin-bottom: 8px; }
.guia-card--labeled .name { font-size: 17px; }

/* ══════════════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════════════ */
@media (max-width: 999px) {
  .site-nav, .header-sep { display: none; }
  .menu-btn { display: flex; }
  .header-actions { margin-left: auto; }
  .article-body__inner { grid-template-columns: 1fr; }
  .article-aside { position: static; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
}

@media (max-width: 639px) {
  .theme-btn { width: 46px; height: 44px; }
  button { min-height: 44px; }
}