/* ═══════════════════════════════════════════════════════
   INCLUXAT — Sistema visual e-ink con accesibilidad
   ═══════════════════════════════════════════════════════
   Filosofía:
   - Paleta cálida "papel/tinta" que imita pantallas e-ink
   - Filtro CSS multicapa que reduce longitudes de onda azules
   - Tipografía optimizada para lectura sostenida
   - Conformidad WCAG 2.1 AA (contraste mín. 4.5:1)
   - Respeta prefers-contrast, forced-colors y prefers-reduced-motion
   - Optimizado para lectura humana Y consumo por bots (RAG)
   ═══════════════════════════════════════════════════════ */

/* ── Variables ──────────────────────────────────────── */
:root {
  /* Paleta e-ink: evita blanco/negro puros */
  --color-paper:          #d9d4cb;   /* fondo cálido principal */
  --color-paper-alt:      #cec9c0;   /* fondo ligeramente más oscuro */
  --color-paper-raised:   #e2ddd5;   /* tarjetas, citas */
  --color-ink:            #252422;   /* texto principal */
  --color-ink-secondary:  #4a4540;   /* texto secundario */
  --color-ink-muted:      #534e49;   /* metadatos, notas */
  --color-accent:         #5a4530;   /* énfasis, headings de sección */
  --color-border:         #b5b0a8;   /* bordes suaves */
  --color-border-strong:  #8c877f;   /* bordes marcados */
  --color-link:           #3d2e1e;   /* enlaces */
  --color-link-focus-bg:  #f0e8d8;   /* fondo de foco */

  /* Tipografía */
  --font-serif:    Georgia, 'Times New Roman', serif;
  --font-sans:     'Segoe UI', system-ui, -apple-system, Roboto, sans-serif;
  --font-mono:     ui-monospace, SFMono-Regular, Menlo, Consolas, 'Liberation Mono', monospace;
  --font-size-sm:  0.875rem;   /* 14px base */
  --font-size-md:  1rem;       /* 16px */
  --font-size-lg:  1.125rem;   /* 18px — lectura cómoda */
  --font-size-xl:  1.375rem;
  --font-size-2xl: 1.75rem;
  --font-size-3xl: 2.125rem;
  --line-height:   1.75;
  --line-height-heading: 1.25;

  /* Layout */
  --max-width:     70ch;
  --sidebar-width: 220px;
  --gap:           1.5rem;
  --gap-lg:        2.5rem;

  /* Filtro e-ink multicapa:
     sepia(18%)      → tonos cálidos, contrarresta longitudes de onda azul
     saturate(75%)   → desatura ligeramente, acerca a escala de grises
     brightness(96%) → reduce emisión total de fotones
     contrast(94%)   → suaviza extremos sin comerse la jerarquía de grises */
  --eink-filter: sepia(18%) saturate(75%) brightness(96%) contrast(94%);

  /* Transiciones */
  --transition: 200ms ease;
}


/* ── Reset mínimo ───────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  /* Filtro e-ink aplicado a toda la página */
  filter: var(--eink-filter);
  /* Permite que el usuario escale con preferencias de SO */
  font-size: 100%;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  hanging-punctuation: first last;
}

body {
  background-color: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: var(--font-size-lg);
  line-height: var(--line-height);
  min-height: 100vh;
}


/* ── Accesibilidad: skip link ───────────────────────── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 9999;
  padding: 0.5rem 1rem;
  background: var(--color-ink);
  color: var(--color-paper);
  font-size: var(--font-size-md);
  font-weight: 700;
  text-decoration: none;
  border-radius: 0 0 4px 4px;
  transition: top var(--transition);
}
.skip-link:focus {
  top: 0;
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}


/* ── Foco global: visible y accesible ───────────────── */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* Elimina el outline por defecto solo cuando hay foco por ratón */
:focus:not(:focus-visible) {
  outline: none;
}


/* ── Header ─────────────────────────────────────────── */
header[role="banner"] {
  background-color: var(--color-paper-alt);
  border-bottom: 2px solid var(--color-border-strong);
  padding: 1rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 200;
}

.header-inner {
  max-width: calc(var(--sidebar-width) + var(--max-width) + var(--gap) * 3);
  margin: 0 auto;
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

/* Marca "incluxat" */
.brand {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-accent);
  line-height: 1;
}

.brand-sub {
  font-size: var(--font-size-sm);
  color: var(--color-ink-muted);
  font-style: italic;
}

/* Controles de header: idioma + hamburger */
.header-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

/* Selector de idioma */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 0.2rem;
  background-color: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 0.2rem 0.5rem;
}

.lang-btn {
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-ink-muted);
  text-decoration: none;
  padding: 0.15rem 0.4rem;
  border-radius: 12px;
  transition: background-color var(--transition), color var(--transition);
}

.lang-btn:hover {
  color: var(--color-ink);
  background-color: var(--color-border);
}

.lang-btn--active {
  background-color: var(--color-accent);
  color: var(--color-paper-raised);
}

.lang-btn--active:hover {
  background-color: var(--color-accent);
  color: var(--color-paper-raised);
}

.lang-sep {
  color: var(--color-border-strong);
  font-size: var(--font-size-sm);
  user-select: none;
}

/* Botón hamburguesa */
.nav-toggle {
  display: none;   /* visible solo en móvil — ver media query */
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: var(--color-paper);
  border: 1px solid var(--color-border-strong);
  border-radius: 6px;
  cursor: pointer;
  color: var(--color-ink);
  transition: background-color var(--transition);
  flex-shrink: 0;
}

.nav-toggle:hover { background-color: var(--color-border); }

/* Icono hamburguesa / X via CSS */
.nav-toggle__icon,
.nav-toggle__icon::before,
.nav-toggle__icon::after {
  display: block;
  width: 18px;
  height: 2px;
  background-color: var(--color-ink);
  border-radius: 2px;
  transition: transform 200ms ease, opacity 200ms ease;
}

.nav-toggle__icon {
  position: relative;
}

.nav-toggle__icon::before,
.nav-toggle__icon::after {
  content: '';
  position: absolute;
  left: 0;
}

.nav-toggle__icon::before { top: -6px; }
.nav-toggle__icon::after  { top:  6px; }

/* Estado abierto → X */
.nav-toggle--open .nav-toggle__icon {
  background-color: transparent;
}
.nav-toggle--open .nav-toggle__icon::before {
  transform: rotate(45deg) translate(4px, 4px);
}
.nav-toggle--open .nav-toggle__icon::after {
  transform: rotate(-45deg) translate(4px, -4px);
}


/* ── Layout: sidebar + contenido ───────────────────── */
.layout {
  display: flex;
  align-items: flex-start;
  max-width: calc(var(--sidebar-width) + var(--max-width) + var(--gap) * 4);
  margin: 0 auto;
  padding: var(--gap-lg) 1.5rem;
  gap: var(--gap-lg);
}


/* ── Overlay (fondo oscuro cuando TOC móvil está abierto) */
.toc-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(37, 36, 34, 0.5);
  z-index: 299;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}
.toc-overlay--visible {
  display: block;
}

/* ── Tabla de contenidos (TOC) ──────────────────────── */
.toc {
  flex: 0 0 var(--sidebar-width);
  position: sticky;
  top: calc(1rem + 60px); /* debajo del header sticky */
  max-height: calc(100vh - 5rem);
  overflow-y: auto;
  background-color: var(--color-paper-alt);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 1.25rem;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-strong) transparent;
}

/* Cabecera del TOC (con botón cerrar visible solo en móvil) */
.toc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.toc-close {
  display: none;  /* visible solo en móvil */
  background: none;
  border: none;
  font-size: 1.1rem;
  color: var(--color-ink-muted);
  cursor: pointer;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  line-height: 1;
}
.toc-close:hover { background-color: var(--color-border); color: var(--color-ink); }

.toc-title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin-bottom: 0;
}

.toc-list,
.toc-list ol {
  list-style: none;
}

.toc {
  counter-reset: toc-counter;   /* uno solo para los dos bloques del índice */
}

.toc-list > li {
  counter-increment: toc-counter;
  margin-bottom: 0.35rem;
}

.toc-list > li > a::before {
  content: counter(toc-counter) ". ";
  color: var(--color-ink-muted);
  font-size: var(--font-size-sm);
}

.toc-list ol {
  margin-top: 0.25rem;
  margin-left: 1rem;
  padding-left: 0.5rem;
  border-left: 2px solid var(--color-border);
}

.toc-list ol li {
  margin-bottom: 0.2rem;
}

.toc a {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-link);
  text-decoration: none;
  padding: 0.15rem 0.25rem;
  border-radius: 3px;
  transition: background-color var(--transition), color var(--transition);
}

.toc a:hover {
  background-color: var(--color-border);
  color: var(--color-ink);
  text-decoration: underline;
}

.toc a:focus-visible {
  background-color: var(--color-link-focus-bg);
}


/* ── Contenido principal ────────────────────────────── */
main {
  flex: 1 1 var(--max-width);
  min-width: 0;   /* evita overflow en flex */
}


/* ── Bloques: humano vs RAG ─────────────────────────── */
.block {
  border-radius: 8px;
  padding: 1.75rem 2rem;
  margin-bottom: 0;
}

/* Bloque 1: contexto para humanos — tono más cálido/editorial */
.block--human {
  background-color: var(--color-paper-raised);
  border: 1px solid var(--color-border);
  /* Franja lateral sutil de identificación */
  border-left: 4px solid var(--color-border-strong);
}

.block--human .block-badge {
  /* El badge se muestra pero de forma discreta */
}

/* Bloque 2: base de conocimiento — más neutral, estructurado */
.block--rag {
  background-color: transparent;
  border: none;
  padding-left: 0;
  padding-right: 0;
}

/* Badge de identificación de bloque */
.block-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--font-size-sm);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.3rem 0.75rem;
  border-radius: 20px;
  margin-bottom: 1.25rem;
}

.block-badge--human {
  color: var(--color-ink-muted);
  background-color: var(--color-paper-alt);
  border: 1px solid var(--color-border);
}

.block-badge--rag {
  color: var(--color-accent);
  background-color: var(--color-paper-alt);
  border: 1px solid var(--color-border-strong);
}

.block-badge__icon {
  font-style: normal;
  font-size: 0.9em;
}

/* Divisor entre bloques */
.block-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 2.5rem 0;
}

.block-divider__line {
  flex: 1;
  height: 1px;
  background-color: var(--color-border-strong);
  display: block;
}

.block-divider__label {
  flex: 0 0 auto;
  font-size: var(--font-size-sm);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  white-space: nowrap;
  padding: 0.2rem 0.6rem;
  background-color: var(--color-paper-alt);
  border: 1px solid var(--color-border-strong);
  border-radius: 4px;
}

/* Etiquetas de grupo en el TOC */
.toc-group-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  margin: 0.75rem 0 0.35rem;
  display: block;
}

.toc-group-label--human {
  color: var(--color-ink-muted);
  border-left: 2px solid var(--color-border-strong);
  padding-left: 0.4rem;
}

.toc-group-label--rag {
  color: var(--color-accent);
  border-left: 2px solid var(--color-accent);
  padding-left: 0.4rem;
}

/* ── Secciones ──────────────────────────────────────── */
.block--human section + section {
  margin-top: var(--gap-lg);
  padding-top: var(--gap-lg);
  border-top: 1px solid var(--color-border);
}

.block--rag section + section,
.block--rag section + article {
  margin-top: var(--gap-lg);
  padding-top: var(--gap-lg);
  border-top: 1px solid var(--color-border);
}


/* ── Tipografía ─────────────────────────────────────── */
h2 {
  font-family: var(--font-serif);
  font-size: var(--font-size-2xl);
  font-weight: 700;
  line-height: var(--line-height-heading);
  color: var(--color-accent);
  margin-bottom: 1rem;
}

h3 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-ink);
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
}

h4 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-ink-secondary);
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: var(--font-size-sm);
}

p {
  margin-bottom: 0.9rem;
  max-width: var(--max-width);
}

p:last-child { margin-bottom: 0; }

strong { color: var(--color-ink); }

em { font-style: italic; }


/* ── Listas ─────────────────────────────────────────── */
ul, ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
  max-width: var(--max-width);
}

li {
  margin-bottom: 0.4rem;
  line-height: var(--line-height);
}

li:last-child { margin-bottom: 0; }

ul > li::marker {
  color: var(--color-border-strong);
}

ol > li::marker {
  color: var(--color-ink-secondary);
  font-weight: 600;
}


/* ── Notas de sección ───────────────────────────────── */
.section-note {
  font-size: var(--font-size-sm);
  color: var(--color-ink-muted);
  font-style: italic;
  margin-bottom: 1.25rem;
  padding: 0.5rem 0.75rem;
  border-left: 3px solid var(--color-border-strong);
  background-color: var(--color-paper-alt);
  border-radius: 0 4px 4px 0;
}


/* ── Blockquotes (legislación) ──────────────────────── */
blockquote {
  margin: 1.25rem 0;
  padding: 1.25rem 1.5rem;
  background-color: var(--color-paper-raised);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 6px 6px 0;
  max-width: var(--max-width);
}

blockquote p {
  font-size: var(--font-size-md);
  color: var(--color-ink-secondary);
  line-height: 1.8;
  margin-bottom: 0.75rem;
}

blockquote p:last-child { margin-bottom: 0; }


/* ── Listas de definiciones ─────────────────────────── */
dl.definitions {
  display: grid;
  gap: 1rem;
  margin-bottom: 1rem;
}

.definition-item {
  background-color: var(--color-paper-raised);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 1rem 1.25rem;
}

.definition-item dt {
  font-weight: 700;
  color: var(--color-accent);
  font-size: var(--font-size-md);
  margin-bottom: 0.35rem;
}

.definition-item dd {
  margin-left: 0;
  color: var(--color-ink-secondary);
  line-height: 1.65;
}


/* ── Tarjetas de nivel ──────────────────────────────── */
.levels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.level-card {
  background-color: var(--color-paper-raised);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.25rem;
}

.level-card--high {
  border-color: var(--color-border-strong);
  border-width: 2px;
}

.level-label {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-accent);
  margin-top: 0;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.level-card dl {
  display: grid;
  gap: 0.6rem;
}

.level-card dt {
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-ink-muted);
  margin-top: 0.4rem;
}

.level-card dd {
  margin-left: 0;
  font-size: var(--font-size-md);
  color: var(--color-ink-secondary);
  line-height: 1.6;
}

.critical-note {
  margin-top: 0.75rem;
  padding: 0.6rem 0.75rem;
  background-color: var(--color-paper-alt);
  border-left: 3px solid var(--color-border-strong);
  border-radius: 0 4px 4px 0;
  font-size: var(--font-size-sm);
  color: var(--color-ink);
}


/* ── Tarjetas de asignatura ─────────────────────────── */
.subject-card {
  background-color: var(--color-paper-raised);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
}

.subject-card h4 {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-ink);
  text-transform: none;
  letter-spacing: normal;
  margin-top: 0;
  margin-bottom: 0.25rem;
}

.level-ref {
  font-size: var(--font-size-sm);
  color: var(--color-ink-muted);
  font-style: italic;
  margin-bottom: 0.75rem;
}


/* ── Lista de medidas (dl dentro de tarjetas) ────────── */
dl.measure-list {
  display: grid;
  /* fit-content acota el término: sin tope, uno largo se come media columna */
  grid-template-columns: fit-content(20ch) 1fr;
  column-gap: 1rem;
  row-gap: 0.4rem;
  align-items: baseline;
}

dl.measure-list dt {
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-ink-muted);
  white-space: nowrap;
  padding-top: 0.1rem;
}

dl.measure-list dd {
  margin-left: 0;
  font-size: var(--font-size-md);
  color: var(--color-ink-secondary);
  line-height: 1.65;
}


/* ── Tarjetas de perfil ─────────────────────────────── */
.profile-card {
  background-color: var(--color-paper-raised);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
}

.profile-card h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-accent);
  margin-top: 0;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}


/* ── Author card ─────────────────────────────────────── */
.author-card {
  background-color: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  margin: 0.75rem 0 1rem;
}

.author-card p {
  margin-bottom: 0.6rem;
}

.author-links {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
}

.author-links li {
  margin: 0;
}

.author-links a {
  font-size: var(--font-size-md);
  color: var(--color-link);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* Sección versión/fechas */
.version-info {
  font-size: var(--font-size-sm);
  color: var(--color-ink-muted);
  margin-bottom: 0.3rem !important;
}

.version-note {
  font-size: var(--font-size-sm);
  color: var(--color-ink-muted);
  font-style: italic;
}

/* ── Contribuir ──────────────────────────────────────── */
.contribute-list {
  list-style: none;
  padding: 0;
}

.contribute-list li {
  padding: 0.35rem 0;
  padding-left: 1.2rem;
  position: relative;
}

.contribute-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-size: 0.9em;
}

/* ── Barra de descarga ───────────────────────────────── */
.download-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  background-color: var(--color-paper);
  border: 1px solid var(--color-border-strong);
  border-radius: 8px;
  padding: 1rem 1.25rem;
  margin-top: 1.25rem;
}

.download-bar__text {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.download-bar__text strong {
  font-size: var(--font-size-md);
  color: var(--color-ink);
}

.download-bar__text span {
  font-size: var(--font-size-sm);
  color: var(--color-ink-muted);
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 1.1rem;
  background-color: var(--color-accent);
  color: var(--color-paper-raised);
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-decoration: none;
  border-radius: 6px;
  white-space: nowrap;
  transition: filter var(--transition);
  flex-shrink: 0;
}

.btn-download:hover {
  filter: brightness(1.15);
}

.btn-download:focus-visible {
  outline: 3px solid var(--color-ink);
  outline-offset: 3px;
}

/* ── Prompt box (copiar prompt IA) ────────────────────── */
.prompt-howto {
  margin: 1rem 0;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background-color: var(--color-paper);
}

.prompt-howto summary {
  padding: 0.75rem 1rem;
  cursor: pointer;
  font-size: var(--font-size-md);
  list-style: none;
}

.prompt-howto summary::-webkit-details-marker { display: none; }

.prompt-howto summary::before {
  content: '▸ ';
  color: var(--color-accent);
  font-weight: 700;
}

.prompt-howto[open] summary::before {
  content: '▾ ';
}

.prompt-howto ol {
  padding: 0 1.25rem 1rem 2.5rem;
  font-size: var(--font-size-sm);
  line-height: 1.7;
}

/* Los <p> y las cajas que van dentro del desplegable necesitan el mismo
   margen lateral que las listas; sin esto quedan pegados al borde. */
.prompt-howto > p {
  margin: 0 1.25rem 0.85rem;
  font-size: var(--font-size-sm);
  line-height: 1.7;
  max-width: none;
}

.prompt-howto > .prompt-box {
  margin: 0 1.25rem 1.25rem;
}

.prompt-howto ol li { margin-bottom: 0.5rem; }

.prompt-howto ul {
  margin-top: 0.35rem;
  padding-left: 1.25rem;
  list-style: disc;
}

.prompt-box {
  border: 1px solid var(--color-border-strong);
  border-radius: 8px;
  overflow: hidden;
  margin-top: 1rem;
}

.prompt-box__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1rem;
  background-color: var(--color-paper-alt);
  border-bottom: 1px solid var(--color-border);
}

.prompt-box__header strong {
  font-size: var(--font-size-sm);
  color: var(--color-ink);
}

.prompt-box__code {
  margin: 0;
  padding: 1rem 1.25rem;
  background-color: var(--color-paper);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--color-ink-muted);
  white-space: pre-wrap;
  word-wrap: break-word;
  max-height: 20rem;
  overflow-y: auto;
  scrollbar-width: thin;
}

.btn-copy {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.4rem 0.85rem;
  background-color: var(--color-accent);
  color: var(--color-paper-raised);
  font-size: var(--font-size-sm);
  font-weight: 700;
  border: none;
  border-radius: 5px;
  cursor: pointer;
  white-space: nowrap;
  transition: filter var(--transition);
  flex-shrink: 0;
}

.btn-copy:hover {
  filter: brightness(1.15);
}

.btn-copy:focus-visible {
  outline: 3px solid var(--color-ink);
  outline-offset: 3px;
}

.btn-copy--copied {
  background-color: var(--color-ink-muted);
  pointer-events: none;
}

/* ── Footer (mínimo) ─────────────────────────────────── */
footer[role="contentinfo"] {
  background-color: var(--color-paper-alt);
  border-top: 1px solid var(--color-border);
  padding: 0.9rem 1.5rem;
  margin-top: var(--gap-lg);
}

.footer-inner {
  max-width: calc(var(--sidebar-width) + var(--max-width) + var(--gap) * 3);
  margin: 0 auto;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  align-items: center;
}

footer p {
  font-size: var(--font-size-sm);
  color: var(--color-ink-muted);
  max-width: none;
  margin-bottom: 0;
}

footer a {
  color: var(--color-link);
}


/* ═══════════════════════════════════════════════════════
   MEDIA QUERIES DE ACCESIBILIDAD
   ═══════════════════════════════════════════════════════ */

/* ── Mayor contraste (sistema operativo o usuario) ──── */
@media (prefers-contrast: more) {
  :root {
    --color-paper:          #f0ece5;
    --color-paper-alt:      #e5e0d8;
    --color-paper-raised:   #f5f1ea;
    --color-ink:            #0d0b09;
    --color-ink-secondary:  #1a1815;
    --color-ink-muted:      #3a3530;
    --color-accent:         #3d2000;
    --color-border:         #7a7570;
    --color-border-strong:  #4a4540;
    --color-link:           #1a0f00;
  }
  /* Desactiva el filtro para no reducir contraste */
  html { filter: none; }
  .skip-link { outline: 3px solid #000; }
}

/* ── Colores forzados (Windows High Contrast) ────────── */
@media (forced-colors: active) {
  html { filter: none; }
  .level-card,
  .subject-card,
  .profile-card,
  .definition-item {
    border: 2px solid ButtonText;
  }
  blockquote {
    border-left: 4px solid Highlight;
  }
  a { color: LinkText; }
  :focus-visible {
    outline: 3px solid Highlight;
  }
}

/* ── Sin preferencia de movimiento ──────────────────── */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* ── Móvil: nav flotante/colapsable ──────────────────── */
@media (max-width: 899px) {
  /* Mostrar botón hamburguesa */
  .nav-toggle {
    display: flex;
  }

  /* Mostrar botón cerrar en TOC */
  .toc-close {
    display: block;
  }

  /* El TOC se convierte en panel lateral fijo */
  .toc {
    position: fixed;
    top: 0;
    left: 0;
    height: 100dvh;
    width: min(300px, 85vw);
    max-height: none;
    border-radius: 0 8px 8px 0;
    border-left: none;
    z-index: 300;
    transform: translateX(-110%);
    visibility: hidden;
    transition: transform 280ms cubic-bezier(0.4, 0, 0.2, 1),
                visibility 280ms cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 4px 0 16px rgba(37, 36, 34, 0.18);
    overflow-y: auto;
    flex: none;
  }

  /* TOC abierto */
  .toc--open {
    transform: translateX(0);
    visibility: visible;
  }

  /* Layout sin sidebar */
  .layout {
    display: block;
    padding: 1.25rem 1rem;
  }

  .levels-grid {
    grid-template-columns: 1fr;
  }

  dl.measure-list {
    grid-template-columns: 1fr;
    row-gap: 0.15rem;
  }

  dl.measure-list dt {
    margin-top: 0.75rem;
  }

  dl.measure-list dt:first-child {
    margin-top: 0;
  }

  .download-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  .btn-download {
    width: 100%;
    justify-content: center;
  }

  .btn-copy {
    width: 100%;
    justify-content: center;
  }

  .prompt-box__header {
    flex-direction: column;
    gap: 0.5rem;
    align-items: stretch;
  }
}

/* ── Tablet intermedia (sidebar más estrecha) ────────── */
@media (min-width: 900px) and (max-width: 1100px) {
  :root {
    --sidebar-width: 180px;
  }
  .layout {
    padding: 1.5rem 1rem;
    gap: 1.5rem;
  }
}


/* ═══════════════════════════════════════════════════════
   ESTILOS DE IMPRESIÓN
   ═══════════════════════════════════════════════════════ */
@media print {
  /* Elimina el filtro e-ink: en papel no es necesario */
  html { filter: none; }

  :root {
    --color-paper:         #ffffff;
    --color-paper-alt:     #f5f5f5;
    --color-paper-raised:  #f0f0f0;
    --color-ink:           #000000;
    --color-ink-secondary: #1a1a1a;
    --color-ink-muted:     #4a4a4a;
    --color-accent:        #1a1a1a;
    --color-border:        #cccccc;
    --color-border-strong: #888888;
  }

  .toc,
  .skip-link,
  .block--human,
  .block-divider,
  .block-badge,
  .toc-overlay,
  .nav-toggle,
  footer { display: none; }

  .layout {
    display: block;
    padding: 0;
    max-width: 100%;
  }

  main {
    max-width: 100%;
  }

  blockquote,
  .level-card,
  .subject-card,
  .profile-card {
    break-inside: avoid;
  }

  h2, h3, h4 {
    break-after: avoid;
  }
}

/* ── Enlaces a herramientas de IA ────────────────────── */
.ia-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  margin: 0.75rem 0 1.25rem;
}
.ia-links li {
  border: 1px solid var(--color-border-strong);
  border-radius: 5px;
  padding: 0.35rem 0.8rem;
  font-size: var(--font-size-sm);
}
.ia-links a { text-decoration: none; }
.ia-links a:hover { text-decoration: underline; }
.ia-links__pendiente {
  color: var(--color-ink-muted);
  font-style: italic;
}

/* ── Diagrama de flujo del asistente ─────────────────── */
/* Los bordes agrupan: son información, no adorno, así que cumplen 3:1
   como componente de interfaz. Por eso van en ink-muted y no en border. */
.flujo {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 1.5rem 0 2rem;
}

.flujo__paso,
.flujo__rama,
.flujo__banda {
  border: 1px solid var(--color-ink-muted);
  border-radius: 6px;
  padding: 1rem 1.15rem;
  background-color: var(--color-paper-raised);
}

.flujo__paso--filtro { border-left-width: 4px; }

.flujo h4 {
  font-size: var(--font-size-md);
  margin-bottom: 0.5rem;
}
.flujo h5 {
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.1rem;
}
.flujo p { margin-bottom: 0.5rem; max-width: none; }
.flujo ul, .flujo ol { margin: 0 0 0 1.1rem; }
.flujo li { margin-bottom: 0.3rem; }
.flujo li:last-child { margin-bottom: 0; }

/* La flecha es decoración: el orden de lectura ya expresa la secuencia */
.flujo__flecha {
  text-align: center;
  font-size: 1.3rem;
  line-height: 1;
  margin: 0;
  color: var(--color-ink-muted);
}

.flujo__marcos {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 0.75rem;
  margin-top: 0.75rem;
}
.flujo__marco {
  border: 1px solid var(--color-ink-muted);
  border-radius: 5px;
  padding: 0.8rem 1rem;
  background-color: var(--color-paper);
}
.flujo__marco--cerrado { border-style: dashed; }
.flujo__marco-tipo {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 0.4rem !important;
}

.flujo__ramas {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 0.5rem;
}

.flujo__banda {
  border-left: 4px solid var(--color-accent);
  background-color: var(--color-paper-alt);
  margin-top: 0.5rem;
}

@media (forced-colors: active) {
  .flujo__paso, .flujo__rama, .flujo__banda, .flujo__marco { border: 1px solid ButtonText; }
  .flujo__banda { border-left: 4px solid Highlight; }
}