/* ==========================================================================
   Hoja de estilos principal
   1. Tokens de diseño (colores, tipografía, espaciado, radios, sombras)
   2. Base y utilidades
   3. Estructura: cabecera, navegación, buscador, pie
   4. Componentes: botones, tarjetas, avisos, migas de pan
   5. Páginas: inicio, listados, artículos
   6. Herramientas: zona de archivos, formularios, resultados
   7. Movimiento reducido e impresión
   Enfoque «mobile first»: los estilos base son para móvil y las consultas
   min-width añaden la reorganización para pantallas mayores.
   ========================================================================== */

/* 1. Tokens ------------------------------------------------------------- */
:root {
  color-scheme: light;
  --c-bg: #f8fafc;
  --c-surface: #ffffff;
  --c-surface-2: #f1f5f9;
  --c-border: #e2e8f0;
  --c-border-strong: #cbd5e1;
  --c-text: #0f172a;
  --c-text-muted: #475569;
  --c-accent: #0a6a70;
  --c-accent-hover: #075459;
  --c-accent-soft: #e2f1f1;
  --c-on-accent: #ffffff;
  --c-focus: #0a6a70;
  --c-info-bg: #e8f0fb;
  --c-info-border: #9db8e0;
  --c-info-text: #1d3f72;
  --c-warn-bg: #fdf3e1;
  --c-warn-border: #e2b25f;
  --c-warn-text: #6b4100;
  --c-danger-bg: #fdecea;
  --c-danger-border: #eba59e;
  --c-danger-text: #9c1c12;
  --c-success-bg: #e6f5ec;
  --c-success-border: #8fcca6;
  --c-success-text: #145c33;
  --c-checker-a: #ffffff;
  --c-checker-b: #e3e7ec;

  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --font-mono: ui-monospace, "Cascadia Mono", "Segoe UI Mono", Consolas, "Liberation Mono", monospace;
  --fs-sm: 0.875rem;
  --fs-base: 1.0625rem;
  --fs-lg: 1.1875rem;
  --fs-h3: 1.1875rem;
  --fs-h2: clamp(1.375rem, 1.2rem + 0.8vw, 1.75rem);
  --fs-h1: clamp(1.875rem, 1.45rem + 1.9vw, 2.75rem);
  --lh-tight: 1.2;
  --lh-base: 1.6;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4.5rem;

  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgb(16 24 40 / 0.06);
  --shadow: 0 1px 3px rgb(16 24 40 / 0.08), 0 4px 12px rgb(16 24 40 / 0.05);
  --shadow-lg: 0 8px 28px rgb(16 24 40 / 0.14);

  --container: 72rem;
  --container-narrow: 46rem;
  --gutter: 1rem;
  --header-h: 3.75rem;
  --transition: 150ms ease;
}

/* Tema oscuro: por preferencia del sistema o elegido manualmente. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --c-bg: #111827;
    --c-surface: #1f2937;
    --c-surface-2: #273449;
    --c-border: #374151;
    --c-border-strong: #4b5563;
    --c-text: #f3f4f6;
    --c-text-muted: #a8b3c2;
    --c-accent: #5ccac5;
    --c-accent-hover: #86dbd7;
    --c-accent-soft: #15302f;
    --c-on-accent: #04201f;
    --c-focus: #7fdcd8;
    --c-info-bg: #142338;
    --c-info-border: #34557f;
    --c-info-text: #b9d0f0;
    --c-warn-bg: #2b2111;
    --c-warn-border: #7a5a22;
    --c-warn-text: #f1d39b;
    --c-danger-bg: #2f1715;
    --c-danger-border: #823530;
    --c-danger-text: #f6b8b1;
    --c-success-bg: #12271b;
    --c-success-border: #2f6a46;
    --c-success-text: #a6e2bd;
    --c-checker-a: #2b3749;
    --c-checker-b: #1f2937;
    --shadow-sm: 0 1px 2px rgb(0 0 0 / 0.4);
    --shadow: 0 1px 3px rgb(0 0 0 / 0.4), 0 4px 12px rgb(0 0 0 / 0.25);
    --shadow-lg: 0 8px 28px rgb(0 0 0 / 0.5);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --c-bg: #111827;
  --c-surface: #1f2937;
  --c-surface-2: #273449;
  --c-border: #374151;
  --c-border-strong: #4b5563;
  --c-text: #f3f4f6;
  --c-text-muted: #a8b3c2;
  --c-accent: #5ccac5;
  --c-accent-hover: #86dbd7;
  --c-accent-soft: #15302f;
  --c-on-accent: #04201f;
  --c-focus: #7fdcd8;
  --c-info-bg: #142338;
  --c-info-border: #34557f;
  --c-info-text: #b9d0f0;
  --c-warn-bg: #2b2111;
  --c-warn-border: #7a5a22;
  --c-warn-text: #f1d39b;
  --c-danger-bg: #2f1715;
  --c-danger-border: #823530;
  --c-danger-text: #f6b8b1;
  --c-success-bg: #12271b;
  --c-success-border: #2f6a46;
  --c-success-text: #a6e2bd;
  --c-checker-a: #2b3749;
  --c-checker-b: #1f2937;
  --shadow-sm: 0 1px 2px rgb(0 0 0 / 0.4);
  --shadow: 0 1px 3px rgb(0 0 0 / 0.4), 0 4px 12px rgb(0 0 0 / 0.25);
  --shadow-lg: 0 8px 28px rgb(0 0 0 / 0.5);
}

/* Color de cada sección (Herramientas, Guías, Aprende, Diagnóstico, Recursos). --c-section es el color de
   marca para iconos y detalles; --c-accent, la variante legible para texto y botones (WCAG AA:
   ≥ 4,5:1 sobre el fondo y las tarjetas en cada tema). Se aplica a la página entera con
   <html data-section> o a un bloque concreto, como las tarjetas de la portada. */
[data-section="herramientas"] { --c-section: #3b82f6; --c-accent: #2563eb; --c-accent-hover: #1d4ed8; --c-accent-soft: #dbeafe; --c-on-accent: #ffffff; --c-focus: #2563eb; }
[data-section="articulos"] { --c-section: #14b8a6; --c-accent: #0f766e; --c-accent-hover: #115e59; --c-accent-soft: #ccfbf1; --c-on-accent: #ffffff; --c-focus: #0f766e; }
[data-section="aprende"] { --c-section: #a78bfa; --c-accent: #7c3aed; --c-accent-hover: #6d28d9; --c-accent-soft: #ede9fe; --c-on-accent: #ffffff; --c-focus: #7c3aed; }
[data-section="diagnostico"] { --c-section: #f59e0b; --c-accent: #b45309; --c-accent-hover: #92400e; --c-accent-soft: #fef3c7; --c-on-accent: #ffffff; --c-focus: #b45309; }
[data-section="recursos"] { --c-section: #f43f5e; --c-accent: #be123c; --c-accent-hover: #9f1239; --c-accent-soft: #ffe4e6; --c-on-accent: #ffffff; --c-focus: #be123c; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"])[data-section="herramientas"], :root:not([data-theme="light"]) [data-section="herramientas"] { --c-accent: #60a5fa; --c-accent-hover: #93c5fd; --c-accent-soft: #172a4a; --c-on-accent: #0b1220; --c-focus: #93c5fd; }
  :root:not([data-theme="light"])[data-section="articulos"], :root:not([data-theme="light"]) [data-section="articulos"] { --c-accent: #2dd4bf; --c-accent-hover: #5eead4; --c-accent-soft: #123534; --c-on-accent: #0b1220; --c-focus: #5eead4; }
  :root:not([data-theme="light"])[data-section="aprende"], :root:not([data-theme="light"]) [data-section="aprende"] { --c-accent: #a78bfa; --c-accent-hover: #c4b5fd; --c-accent-soft: #2a2350; --c-on-accent: #0b1220; --c-focus: #c4b5fd; }
  :root:not([data-theme="light"])[data-section="diagnostico"], :root:not([data-theme="light"]) [data-section="diagnostico"] { --c-accent: #f59e0b; --c-accent-hover: #fbbf24; --c-accent-soft: #3a2a10; --c-on-accent: #0b1220; --c-focus: #fbbf24; }
  :root:not([data-theme="light"])[data-section="recursos"], :root:not([data-theme="light"]) [data-section="recursos"] { --c-accent: #fb7185; --c-accent-hover: #fda4af; --c-accent-soft: #3b1820; --c-on-accent: #0b1220; --c-focus: #fda4af; }
}
:root[data-theme="dark"][data-section="herramientas"], :root[data-theme="dark"] [data-section="herramientas"] { --c-accent: #60a5fa; --c-accent-hover: #93c5fd; --c-accent-soft: #172a4a; --c-on-accent: #0b1220; --c-focus: #93c5fd; }
:root[data-theme="dark"][data-section="articulos"], :root[data-theme="dark"] [data-section="articulos"] { --c-accent: #2dd4bf; --c-accent-hover: #5eead4; --c-accent-soft: #123534; --c-on-accent: #0b1220; --c-focus: #5eead4; }
:root[data-theme="dark"][data-section="aprende"], :root[data-theme="dark"] [data-section="aprende"] { --c-accent: #a78bfa; --c-accent-hover: #c4b5fd; --c-accent-soft: #2a2350; --c-on-accent: #0b1220; --c-focus: #c4b5fd; }
:root[data-theme="dark"][data-section="diagnostico"], :root[data-theme="dark"] [data-section="diagnostico"] { --c-accent: #f59e0b; --c-accent-hover: #fbbf24; --c-accent-soft: #3a2a10; --c-on-accent: #0b1220; --c-focus: #fbbf24; }
:root[data-theme="dark"][data-section="recursos"], :root[data-theme="dark"] [data-section="recursos"] { --c-accent: #fb7185; --c-accent-hover: #fda4af; --c-accent-soft: #3b1820; --c-on-accent: #0b1220; --c-focus: #fda4af; }

/* 2. Base ---------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; scroll-padding-top: calc(var(--header-h) + var(--space-4)); }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  overflow-wrap: break-word;
}
main { flex: 1 0 auto; outline: none; }
img, svg, canvas { display: block; max-width: 100%; }
img { height: auto; }
h1, h2, h3, h4 { line-height: var(--lh-tight); letter-spacing: -0.01em; margin: 0 0 var(--space-3); text-wrap: balance; }
h1 { font-size: var(--fs-h1); font-weight: 750; }
h2 { font-size: var(--fs-h2); font-weight: 700; }
h3 { font-size: var(--fs-h3); font-weight: 650; }
p { margin: 0 0 var(--space-4); }
a { color: var(--c-accent); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { color: var(--c-accent-hover); text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--c-focus); outline-offset: 2px; border-radius: 3px; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
code, kbd { font-family: var(--font-mono); font-size: 0.92em; }
code { background: var(--c-surface-2); padding: 0.1em 0.35em; border-radius: 4px; }
kbd { border: 1px solid var(--c-border-strong); border-bottom-width: 2px; border-radius: 4px; padding: 0.05em 0.4em; background: var(--c-surface); }
hr { border: 0; border-top: 1px solid var(--c-border); margin: var(--space-6) 0; }
[hidden] { display: none !important; }

.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.container--narrow { max-width: calc(var(--container-narrow) + 2 * var(--gutter)); }
.visually-hidden {
  position: absolute !important; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: var(--space-4); top: -100px; z-index: 100;
  background: var(--c-accent); color: var(--c-on-accent); padding: var(--space-2) var(--space-4); border-radius: var(--radius-sm);
  font-weight: 600; text-decoration: none;
}
.skip-link:focus { top: var(--space-2); color: var(--c-on-accent); }
.icon { width: 1.25em; height: 1.25em; flex: none; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.eyebrow, .card__eyebrow { font-size: var(--fs-sm); font-weight: 600; color: var(--c-text-muted); margin: 0 0 var(--space-2); letter-spacing: 0.01em; }
.eyebrow a { color: inherit; text-decoration: none; }
.eyebrow a:hover { color: var(--c-accent); text-decoration: underline; }
.lead { font-size: var(--fs-lg); color: var(--c-text-muted); max-width: 44rem; }
.placeholder { background: var(--c-warn-bg); color: var(--c-warn-text); border: 1px dashed var(--c-warn-border); padding: 0 0.3em; border-radius: 4px; font-weight: 600; }
.section { padding-block: var(--space-7); }
.section--alt { background: var(--c-surface); border-block: 1px solid var(--c-border); }
.section__head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: var(--space-2) var(--space-5); margin-bottom: var(--space-5); }
.section__head h2 { margin: 0; }
.section__head p { margin: 0; color: var(--c-text-muted); }
.section__link { display: inline-flex; align-items: center; gap: var(--space-1); font-weight: 600; text-decoration: none; }
.section__link:hover { text-decoration: underline; }

/* 3. Cabecera -------------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--c-surface) 92%, transparent);
  border-bottom: 1px solid var(--c-border);
  backdrop-filter: saturate(1.4) blur(8px);
}
@supports not (background: color-mix(in srgb, red 50%, transparent)) {
  .site-header { background: var(--c-surface); }
}
.site-header__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas: "brand actions" "search search" "nav nav";
  align-items: center;
  column-gap: var(--space-3);
  min-height: var(--header-h);
}
.brand { grid-area: brand; display: inline-flex; align-items: center; gap: var(--space-2); color: var(--c-text); text-decoration: none; font-weight: 750; font-size: 1.125rem; letter-spacing: -0.015em; padding-block: var(--space-2); width: max-content; }
.brand:hover { color: var(--c-text); }
.brand__mark { width: 30px; height: 30px; }
/* El logotipo mantiene el color de la marca en todas las secciones. */
.brand__mark rect { fill: #0a6a70; }
.brand__mark path { fill: none; stroke: #ffffff; stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.site-header__search { grid-area: search; padding-bottom: var(--space-3); }
.site-header__actions { grid-area: actions; display: flex; gap: var(--space-1); }
.icon-btn {
  display: inline-grid; place-items: center; width: 44px; height: 44px; padding: 0;
  border: 1px solid transparent; border-radius: var(--radius-sm); background: transparent; color: var(--c-text);
  transition: background var(--transition), border-color var(--transition);
}
.icon-btn:hover { background: var(--c-surface-2); border-color: var(--c-border); }
.icon-btn .icon { width: 22px; height: 22px; }
.theme-toggle .icon--sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon--sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon--moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon--sun { display: block; }
  :root:not([data-theme="light"]) .theme-toggle .icon--moon { display: none; }
}
/* Sin JavaScript el selector de tema y el botón de menú no funcionarían: se ocultan. */
:root:not(.js) .theme-toggle, :root:not(.js) .nav-toggle { display: none; }
.nav-toggle .icon--close { display: none; }
.nav-toggle[aria-expanded="true"] .icon--menu { display: none; }
.nav-toggle[aria-expanded="true"] .icon--close { display: block; }

/* Marca con lema (el lema solo cabe a partir de tableta). */
.brand__text { display: grid; line-height: 1.15; }
.brand__tagline { display: none; font-size: 0.75rem; font-weight: 550; letter-spacing: 0; color: var(--c-text-muted); }
@media (min-width: 560px) { .brand__tagline { display: block; } }

/* Menú principal: una fila propia bajo el logotipo y el buscador, con el icono de cada sección en su
   color. La sección actual se marca con una barra de su color. */
.site-nav__list { list-style: none; margin: 0; padding: 0; }
.site-nav__item { position: relative; }
.site-nav__link {
  display: flex; align-items: center; gap: var(--space-2); padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm); color: var(--c-text); text-decoration: none; font-weight: 600;
}
.site-nav__link:hover { color: var(--c-text); background: var(--c-surface-2); }
.site-nav__icon {
  display: inline-grid; place-items: center; width: 28px; height: 28px; flex: none; border-radius: 8px;
  background: color-mix(in srgb, var(--c-section) 16%, transparent); color: var(--c-accent);
}
.site-nav__icon .icon { width: 18px; height: 18px; }
.site-nav__link[aria-current="page"] { color: var(--c-accent-hover); background: var(--c-accent-soft); }
.site-nav__link[aria-current="page"] .site-nav__icon { background: var(--c-section); color: #ffffff; }
.site-nav__text, .site-nav__panel { display: none; }

/* Hasta 1000 px: botón de menú (con JavaScript; sin él, el menú se muestra siempre) y las secciones
   como fichas con su descripción, de una en una en el móvil y de dos en dos en tableta. */
@media (max-width: 999.98px) {
  .site-header__inner { padding-top: var(--space-2); row-gap: var(--space-2); }
  .site-header__search { padding-bottom: var(--space-4); }
  :root.js .site-nav { display: none; }
  :root.js .site-nav.is-open { display: block; }
  .site-nav { border-top: 1px solid var(--c-border); max-height: calc(100dvh - 8rem); overflow-y: auto; overscroll-behavior: contain; }
  .site-nav__list { display: grid; gap: var(--space-2); padding: var(--space-3) 0 var(--space-4); }
  .site-nav__item {
    padding: var(--space-2) var(--space-3); border: 1px solid var(--c-border); border-left: 4px solid var(--c-section);
    border-radius: var(--radius); background: var(--c-surface);
  }
  .site-nav__item:has([aria-current]) { background: var(--c-accent-soft); }
  .site-nav__link { gap: var(--space-3); padding: 0; font-size: var(--fs-lg); }
  .site-nav__link:hover, .site-nav__link[aria-current="page"] { background: none; }
  .site-nav__icon { width: 40px; height: 40px; border-radius: var(--radius); }
  .site-nav__icon .icon { width: 22px; height: 22px; }
  /* Toda la ficha es clicable: el enlace la cubre entera (su foco se dibuja en la ficha). */
  .site-nav__link::after { content: ""; position: absolute; inset: 0; border-radius: var(--radius); }
  .site-nav__link:focus-visible { outline: none; }
  .site-nav__link:focus-visible::after { outline: 3px solid var(--c-focus); outline-offset: 2px; }
  .site-nav__text { display: block; margin: 0; padding-left: calc(40px + var(--space-3)); font-size: var(--fs-sm); color: var(--c-text-muted); }
}
@media (min-width: 640px) and (max-width: 999.98px) { .site-nav__list { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

@media (min-width: 1000px) {
  .site-header__inner { grid-template-columns: auto minmax(0, 1fr) auto; grid-template-areas: "brand search actions"; column-gap: var(--space-6); padding-block: var(--space-1); }
  .site-header__search { padding-bottom: 0; justify-self: center; width: min(100%, 34rem); }
  .nav-toggle { display: none; }
  .site-nav { border-top: 1px solid var(--c-border); }
  .site-nav__list { display: flex; gap: var(--space-1); justify-content: space-between; }
  .site-nav__link { position: relative; padding-block: 0.55rem; font-size: 0.9688rem; }
  .site-nav__link::after {
    content: ""; position: absolute; left: var(--space-3); right: var(--space-3); bottom: -1px; height: 3px;
    border-radius: 3px 3px 0 0; background: var(--c-section); opacity: 0; transform: scaleX(var(--nav-bar-scale, 0.3));
    transition: opacity 200ms ease, transform 250ms ease;
  }
  .site-nav__link:hover::after, .site-nav__link[aria-current="page"]::after { opacity: 1; --nav-bar-scale: 1; }
  .site-nav__link[aria-current="page"] { background: none; }
}
@media (min-width: 1200px) { .site-nav__list { justify-content: flex-start; gap: var(--space-2); } }

/* Panel de cada sección al pasar el ratón (solo con ratón: en pantallas táctiles el primer toque
   abriría el panel en vez de seguir el enlace). Oculto con visibility, así no recibe el foco. */
@media (min-width: 1000px) and (hover: hover) and (pointer: fine) {
  .site-nav__panel {
    display: block; position: absolute; top: calc(100% + 1px); left: 0; z-index: 70; width: 23rem;
    padding: var(--space-4); border: 1px solid var(--c-border); border-top: 3px solid var(--c-section);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg); background: var(--c-surface); box-shadow: var(--shadow-lg);
    visibility: hidden; opacity: 0; transform: translateY(var(--panel-shift, -6px));
    transition: opacity 180ms ease, transform 220ms ease, visibility 0s linear 220ms;
  }
  .site-nav__item:nth-last-child(-n+3) .site-nav__panel { left: auto; right: 0; }
  .site-nav__item:hover .site-nav__panel {
    visibility: visible; opacity: 1; transform: none;
    transition: opacity 180ms ease 120ms, transform 220ms ease 120ms, visibility 0s linear 120ms;
  }
  .site-nav__panel-title { margin: 0; font-weight: 750; font-size: var(--fs-lg); color: var(--c-accent); }
  .site-nav__panel-text { margin: 0 0 var(--space-3); font-size: var(--fs-sm); color: var(--c-text-muted); }
  .site-nav__sub { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
  .site-nav__sub a {
    display: flex; align-items: center; gap: var(--space-2); padding: 0.4rem var(--space-2); border-radius: var(--radius-sm);
    color: var(--c-text); text-decoration: none; font-size: var(--fs-sm); font-weight: 550;
    transition: background 150ms ease, color 150ms ease;
  }
  .site-nav__sub a:hover { background: var(--c-accent-soft); color: var(--c-accent-hover); }
  .site-nav__sub .icon { width: 16px; height: 16px; flex: none; color: var(--c-accent); }
}

/* Buscador */
.search { position: relative; display: flex; gap: var(--space-2); }
.search__field { position: relative; flex: 1; min-width: 0; }
.search__icon {
  position: absolute; left: 0.85rem; top: 50%; translate: 0 -50%; color: var(--c-text-muted); pointer-events: none;
  transition: color 0.2s ease, scale 0.25s cubic-bezier(.34, 1.56, .64, 1);
}
.search__input {
  width: 100%; min-height: 44px; padding: 0.55rem 2.6rem 0.55rem 2.6rem;
  border: 1px solid var(--c-border); border-radius: 999px;
  background: color-mix(in srgb, var(--c-surface-2) 70%, var(--c-surface));
  box-shadow: inset 0 1px 2px rgb(16 24 40 / 0.06);
  appearance: none; transition: border-color 0.2s ease, background-color 0.2s ease, box-shadow 0.25s ease;
}
.search__input:hover { border-color: var(--c-border-strong); background: var(--c-surface); }
.search__input::placeholder { color: var(--c-text-muted); opacity: 1; }
.search__input:focus-visible {
  outline: 2px solid transparent; border-color: var(--c-accent); background: var(--c-surface);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--c-focus) 28%, transparent), 0 8px 24px -12px color-mix(in srgb, var(--c-accent) 60%, transparent);
}
.search__field:focus-within .search__icon { color: var(--c-accent); scale: var(--pop, 1.08); }
.search__input::-webkit-search-cancel-button { cursor: pointer; }
/* Atajo de teclado «/»: solo en escritorio y mientras el campo está vacío y sin foco. */
.search__kbd {
  position: absolute; right: 0.7rem; top: 50%; translate: 0 -50%; display: none;
  min-width: 1.6rem; padding: 0.05rem 0.4rem; border: 1px solid var(--c-border-strong); border-bottom-width: 2px;
  border-radius: var(--radius-sm); background: var(--c-surface); color: var(--c-text-muted);
  font: 600 0.8rem/1.4 var(--font-mono, ui-monospace, monospace); text-align: center; pointer-events: none;
  transition: opacity 0.2s ease;
}
@media (hover: hover) and (pointer: fine) { .search__kbd { display: block; } }
.search__input:focus ~ .search__kbd, .search__input:not(:placeholder-shown) ~ .search__kbd { opacity: 0; }
.search--hero .search__input, .search--page .search__input {
  min-height: 56px; font-size: var(--fs-lg); padding-left: 3rem; background: var(--c-surface);
  border-color: var(--c-border-strong); box-shadow: var(--shadow);
}
.search--hero .search__input:focus-visible, .search--page .search__input:focus-visible {
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--c-focus) 26%, transparent), var(--shadow-lg);
}
.search--hero .search__icon, .search--page .search__icon { left: 1rem; width: 1.4em; height: 1.4em; }
.search--hero .search__submit, .search--page .search__submit { border-radius: 999px; padding-inline: var(--space-5); }
.search__panel {
  position: absolute; z-index: 60; top: calc(100% + 8px); left: 0; right: 0;
  background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); padding: var(--space-2); max-height: min(70vh, 28rem); overflow-y: auto;
  animation: search-panel-in 0.18s ease-out both;
}
@keyframes search-panel-in { from { opacity: 0; translate: 0 var(--drop, -8px); } }
.search__results { list-style: none; margin: 0; padding: 0; }
.search__option {
  display: block; padding: var(--space-2) var(--space-3); border-radius: var(--radius);
  border-left: 3px solid transparent; color: var(--c-text); text-decoration: none; cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}
.search__option:hover, .search__option[aria-selected="true"] { background: var(--c-accent-soft); border-left-color: var(--c-accent); color: var(--c-text); }
.search__option-title { display: block; font-weight: 600; line-height: 1.35; }
.search__option-meta { display: block; font-size: var(--fs-sm); color: var(--c-text-muted); }
.search__message { margin: var(--space-2) var(--space-3); font-size: var(--fs-sm); color: var(--c-text-muted); }
.search__all { display: block; margin-top: var(--space-1); padding: var(--space-2) var(--space-3); font-size: var(--fs-sm); font-weight: 600; border-top: 1px solid var(--c-border); }
mark.hl { background: color-mix(in srgb, var(--c-accent) 22%, transparent); color: inherit; border-radius: 2px; padding: 0; }

/* Pie */
.site-footer { margin-top: var(--space-8); background: var(--c-surface); border-top: 1px solid var(--c-border); font-size: 0.9375rem; }
.footer-grid { display: grid; gap: var(--space-6); padding-block: var(--space-7) var(--space-6); grid-template-columns: 1fr; }
.footer-about p { color: var(--c-text-muted); max-width: 28rem; }
.footer-note { display: flex; gap: var(--space-2); align-items: flex-start; }
.footer-note .icon { margin-top: 0.2em; color: var(--c-accent); }
.footer-nav h2 { font-size: 0.9375rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--c-text-muted); margin-bottom: var(--space-3); }
.footer-nav ul { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-1); }
.footer-nav a, .link-btn { color: var(--c-text); text-decoration: none; display: inline-block; padding-block: 0.3rem; }
.footer-nav a:hover, .link-btn:hover { color: var(--c-accent); text-decoration: underline; }
.link-btn { background: none; border: 0; padding-inline: 0; text-align: left; }
.footer-bottom { border-top: 1px solid var(--c-border); padding-block: var(--space-4); color: var(--c-text-muted); font-size: var(--fs-sm); }
.footer-bottom p { margin: 0; }
@media (min-width: 640px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1000px) { .footer-grid { grid-template-columns: 1.6fr 1fr 1fr 1fr 1fr; } }

/* 4. Componentes ---------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  min-height: 44px; padding: 0.55rem 1.1rem; border-radius: var(--radius);
  border: 1px solid var(--c-border-strong); background: var(--c-surface); color: var(--c-text);
  font-weight: 600; line-height: 1.2; text-decoration: none; white-space: nowrap;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.btn:hover { background: var(--c-surface-2); color: var(--c-text); text-decoration: none; }
.btn--primary { background: var(--c-accent); border-color: var(--c-accent); color: var(--c-on-accent); }
.btn--primary:hover { background: var(--c-accent-hover); border-color: var(--c-accent-hover); color: var(--c-on-accent); }
.btn--ghost { border-color: transparent; background: transparent; }
.btn--ghost:hover { background: var(--c-surface-2); }
.btn--sm { min-height: 36px; padding: 0.35rem 0.75rem; font-size: var(--fs-sm); }
.btn--icon { padding: 0; width: 40px; min-height: 40px; }
.btn[disabled], .btn[aria-disabled="true"] { opacity: 0.55; cursor: not-allowed; }
.btn.is-busy { position: relative; color: transparent !important; pointer-events: none; }
.btn.is-busy::after {
  content: ""; position: absolute; width: 1.1rem; height: 1.1rem; border-radius: 50%;
  border: 2px solid var(--c-on-accent); border-right-color: transparent; animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.card-grid { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-4); grid-template-columns: 1fr; }
@media (min-width: 640px) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .card-grid--tools, .card-grid--categories { grid-template-columns: repeat(3, 1fr); } }
.card {
  position: relative; display: flex; flex-direction: column; gap: var(--space-2);
  background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius-lg);
  padding: var(--space-5); box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.card:hover { border-color: var(--c-border-strong); box-shadow: var(--shadow); }
.card:focus-within { border-color: var(--c-accent); }
.card__title { margin: 0; font-size: var(--fs-h3); }
.card__link { color: var(--c-text); text-decoration: none; }
.card__link:hover { color: var(--c-accent); }
/* Toda la tarjeta es clicable, pero el enlace real (y su foco) es el título. */
.card__link::after { content: ""; position: absolute; inset: 0; border-radius: inherit; }
.card__link:focus-visible { outline: none; }
.card__link:focus-visible::after { outline: 3px solid var(--c-focus); outline-offset: 2px; }
.card__text { color: var(--c-text-muted); margin: 0; }
.card__eyebrow { margin: 0; }
.card__icon, .category-card__icon, .page-hero__icon {
  display: inline-grid; place-items: center; width: 44px; height: 44px; flex: none;
  border-radius: var(--radius); background: var(--c-accent-soft); color: var(--c-accent);
}
.card__icon .icon, .category-card__icon .icon { width: 24px; height: 24px; }
.tool-card { flex-direction: row; align-items: flex-start; gap: var(--space-4); }
.card__body { display: grid; gap: var(--space-1); }
.card__more { margin-top: auto; padding-top: var(--space-2); display: inline-flex; align-items: center; gap: var(--space-1); font-weight: 600; color: var(--c-accent); font-size: var(--fs-sm); }
.category-card__count { margin: auto 0 0; font-size: var(--fs-sm); color: var(--c-text-muted); font-weight: 600; }

.notice { display: flex; gap: var(--space-3); padding: var(--space-4); border: 1px solid; border-radius: var(--radius); margin-block: var(--space-4); }
.notice p:last-child { margin-bottom: 0; }
.notice__icon { margin-top: 0.15em; }
.notice__title { font-weight: 700; margin-bottom: var(--space-1); }
.notice--info { background: var(--c-info-bg); border-color: var(--c-info-border); color: var(--c-info-text); }
.notice--warning { background: var(--c-warn-bg); border-color: var(--c-warn-border); color: var(--c-warn-text); }
.notice a { color: inherit; font-weight: 600; }

.breadcrumbs { padding-top: var(--space-4); font-size: var(--fs-sm); }
.breadcrumbs ol { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--space-1); color: var(--c-text-muted); }
.breadcrumbs li:not(:last-child)::after { content: "/"; margin-left: var(--space-1); color: var(--c-border-strong); }
.breadcrumbs a { color: var(--c-text-muted); padding-block: 0.4rem; display: inline-block; }
.breadcrumbs a:hover { color: var(--c-accent); }
.breadcrumbs [aria-current] { color: var(--c-text); }

.related { margin-top: var(--space-7); padding: var(--space-5); background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius-lg); }
.related h2 { font-size: var(--fs-h3); }
.related__list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-2); }
.related__list a { display: flex; flex-wrap: wrap; align-items: baseline; gap: var(--space-1) var(--space-3); padding: var(--space-2) 0; font-weight: 600; }
.related__type { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--c-text-muted); background: var(--c-surface-2); padding: 0.1rem 0.45rem; border-radius: 4px; }

.ad-slot { margin-block: var(--space-7); padding-top: var(--space-2); border-top: 1px solid var(--c-border); min-height: 120px; }
.ad-slot__label { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--c-text-muted); margin-bottom: var(--space-2); }
.affiliate-link__tag { display: inline-block; margin-left: 0.4em; font-size: 0.75rem; font-weight: 600; color: var(--c-text-muted); border: 1px solid var(--c-border); border-radius: 4px; padding: 0 0.35em; vertical-align: 0.1em; }

/* 5. Páginas --------------------------------------------------------------- */
.hero { padding-block: var(--space-7) var(--space-6); }
.hero h1 { max-width: 20ch; }
.hero .hero__title { max-width: 16ch; }
.hero .lead { margin-bottom: var(--space-5); }
.hero .search { max-width: 40rem; }
.hero__shortcuts { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); margin: var(--space-4) 0 0; padding: 0; list-style: none; }
.hero__shortcuts-label { font-size: var(--fs-sm); color: var(--c-text-muted); margin-right: var(--space-1); }
.chip { display: inline-flex; align-items: center; gap: var(--space-2); min-height: 40px; padding: 0.3rem 0.85rem; border: 1px solid var(--c-border); border-radius: 999px; background: var(--c-surface); color: var(--c-text); text-decoration: none; font-size: var(--fs-sm); font-weight: 600; }
.chip:hover { border-color: var(--c-accent); color: var(--c-accent); }
.chip .icon { width: 1.1em; height: 1.1em; color: var(--c-accent); }
@media (min-width: 900px) { .hero { padding-block: var(--space-8) var(--space-7); } }

.steps { list-style: none; counter-reset: step; margin: 0; padding: 0; display: grid; gap: var(--space-5); }
.steps li { counter-increment: step; position: relative; padding-left: 3.25rem; }
.steps li::before {
  content: counter(step); position: absolute; left: 0; top: -0.1rem; width: 2.25rem; height: 2.25rem; display: grid; place-items: center;
  border-radius: 50%; background: var(--c-accent-soft); color: var(--c-accent); font-weight: 700;
}
.steps h3 { margin-bottom: var(--space-1); }
.steps p { margin: 0; color: var(--c-text-muted); }
.features { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-4); }
.features li { display: flex; gap: var(--space-3); }
.features .icon { color: var(--c-accent); margin-top: 0.2em; width: 1.4em; height: 1.4em; }
.features strong { display: block; }
.features span { color: var(--c-text-muted); }
.split { display: grid; gap: var(--space-7); }
@media (min-width: 900px) { .split { grid-template-columns: 1fr 1fr; } .steps { gap: var(--space-5); } }

.page-hero { padding-block: var(--space-5) var(--space-5); }
.page-hero__inner { display: flex; gap: var(--space-4); align-items: flex-start; }
.page-hero__icon { width: 52px; height: 52px; margin-top: 0.35rem; }
.page-hero__icon .icon { width: 28px; height: 28px; }
.page-hero .lead { margin-bottom: var(--space-3); }
.trust-list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-5); font-size: var(--fs-sm); color: var(--c-text-muted); font-weight: 600; }
.trust-list li { display: inline-flex; align-items: center; gap: var(--space-1); }
.trust-list .icon { color: var(--c-success-text); }
@media (max-width: 559.98px) { .page-hero__icon { display: none; } }

.hub-section { padding-top: var(--space-6); }
.hub-section > h2 { display: flex; align-items: center; gap: var(--space-2); }
.hub-section > h2 .icon { color: var(--c-accent); }
.hub-section > p { color: var(--c-text-muted); max-width: 44rem; }

/* Artículos */
.article__header { padding-block: var(--space-5) var(--space-3); }
.article-meta { font-size: var(--fs-sm); color: var(--c-text-muted); margin: 0; }
.prose { font-size: var(--fs-base); }
.prose > * + h2 { margin-top: var(--space-7); }
.prose > * + h3 { margin-top: var(--space-5); }
.prose ul, .prose ol { padding-left: 1.4rem; margin: 0 0 var(--space-4); }
.prose li + li { margin-top: var(--space-2); }
.prose blockquote { margin: var(--space-5) 0; padding: var(--space-3) var(--space-4); border-left: 4px solid var(--c-accent); background: var(--c-surface); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.prose blockquote p:last-child { margin: 0; }
.prose pre { background: var(--c-surface-2); border: 1px solid var(--c-border); border-radius: var(--radius); padding: var(--space-4); overflow-x: auto; font-size: 0.9rem; line-height: 1.5; }
.prose pre code { background: none; padding: 0; }
.table-wrap { overflow-x: auto; margin: 0 0 var(--space-5); border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface); }
.prose table, .data-table { width: 100%; border-collapse: collapse; font-size: 0.9375rem; }
.prose th, .prose td, .data-table th, .data-table td { text-align: left; padding: 0.6rem 0.85rem; border-bottom: 1px solid var(--c-border); vertical-align: top; }
.prose thead th, .data-table thead th { background: var(--c-surface-2); font-weight: 650; white-space: nowrap; }
.prose tbody tr:last-child td, .data-table tbody tr:last-child td { border-bottom: 0; }
.num { font-variant-numeric: tabular-nums; white-space: nowrap; }
.prose .formula { display: block; font-family: var(--font-mono); background: var(--c-surface); border: 1px solid var(--c-border); border-left: 4px solid var(--c-accent); padding: var(--space-3) var(--space-4); border-radius: var(--radius-sm); margin-bottom: var(--space-4); overflow-x: auto; white-space: nowrap; }
.sources { margin-top: var(--space-7); font-size: 0.9375rem; }
.sources h2 { font-size: var(--fs-h3); }
.sources ul { padding-left: 1.2rem; }
.sources li + li { margin-top: var(--space-2); }
.sources__publisher { color: var(--c-text-muted); }
.legal-note { font-size: var(--fs-sm); color: var(--c-text-muted); }

/* Página 404 y búsqueda */
.error-page { padding-block: var(--space-8) var(--space-6); }
.error-page__code { font-size: var(--fs-sm); font-weight: 700; color: var(--c-accent); letter-spacing: 0.08em; text-transform: uppercase; }
.search-page__results { list-style: none; margin: var(--space-5) 0 0; padding: 0; display: grid; gap: var(--space-3); }
.search-page__results .card { padding: var(--space-4) var(--space-5); }
.search-page__status { margin-top: var(--space-4); color: var(--c-text-muted); }

/* 6. Herramientas ------------------------------------------------------------ */
.tool-shell { margin-bottom: var(--space-6); }
.tool-panel {
  background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius-lg);
  box-shadow: var(--shadow); padding: var(--space-4);
}
@media (min-width: 640px) { .tool-panel { padding: var(--space-6); } }
.tool-panel > * + * { margin-top: var(--space-5); }
.tool-grid { display: grid; gap: var(--space-5); grid-template-columns: minmax(0, 1fr); }
@media (min-width: 900px) { .tool-grid--2 { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: start; } }
.panel-title { font-size: var(--fs-h3); margin-bottom: var(--space-3); display: flex; align-items: center; gap: var(--space-2); }
.panel-title .icon { color: var(--c-accent); flex: none; }

.dropzone {
  position: relative; display: grid; place-items: center; text-align: center; gap: var(--space-2);
  padding: var(--space-6) var(--space-4); min-height: 13rem;
  border: 2px dashed var(--c-border-strong); border-radius: var(--radius-lg); background: var(--c-surface-2);
  transition: border-color var(--transition), background var(--transition);
}
.dropzone.is-dragover { border-color: var(--c-accent); background: var(--c-accent-soft); }
.dropzone:focus-within { border-color: var(--c-accent); }
.dropzone__icon { width: 2.5rem; height: 2.5rem; color: var(--c-accent); }
.dropzone__title { font-weight: 700; font-size: var(--fs-lg); margin: 0; }
.dropzone__hint { margin: 0; color: var(--c-text-muted); font-size: var(--fs-sm); }
.dropzone__input { position: absolute; width: 1px; height: 1px; opacity: 0; overflow: hidden; }
.dropzone__input:focus-visible + .btn { outline: 3px solid var(--c-focus); outline-offset: 2px; }
.dropzone--compact { min-height: auto; padding: var(--space-4); grid-template-columns: auto; }

.file-info { display: flex; gap: var(--space-4); align-items: center; padding: var(--space-3) var(--space-4); border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface-2); }
.file-info__name { font-weight: 650; margin: 0; overflow-wrap: anywhere; }
.file-info__meta { margin: 0; color: var(--c-text-muted); font-size: var(--fs-sm); }
.file-info__body { min-width: 0; flex: 1; }

.field { display: grid; gap: var(--space-1); }
.field + .field, .field + fieldset, fieldset + .field { margin-top: var(--space-4); }
.field label, .field__label, legend { font-weight: 650; }
.field__hint { font-size: var(--fs-sm); color: var(--c-text-muted); margin: 0; }
.field__error { font-size: var(--fs-sm); color: var(--c-danger-text); font-weight: 600; margin: 0; }
.input, .select {
  width: 100%; min-height: 44px; padding: 0.5rem 0.75rem; border: 1px solid var(--c-border-strong);
  border-radius: var(--radius-sm); background: var(--c-surface);
}
.input:focus-visible, .select:focus-visible { outline: 3px solid var(--c-focus); outline-offset: 0; border-color: var(--c-accent); }
.input[aria-invalid="true"] { border-color: var(--c-danger-text); box-shadow: 0 0 0 1px var(--c-danger-text); }
.input--num { font-variant-numeric: tabular-nums; }
.input--lg { font-size: 1.25rem; min-height: 52px; }
.select { appearance: auto; }
.input-group { display: flex; gap: var(--space-2); align-items: stretch; }
.input-group > * { min-width: 0; }
.input-group .input { flex: 1; }
.input-group .select { flex: 0 1 11rem; width: auto; }
fieldset { border: 0; margin: 0; padding: 0; min-width: 0; }
legend { padding: 0; margin-bottom: var(--space-2); }
.segmented { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.segmented label { position: relative; }
.segmented input { position: absolute; opacity: 0; width: 1px; height: 1px; }
.segmented span {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0.45rem 1rem;
  border: 1px solid var(--c-border-strong); border-radius: var(--radius-sm); background: var(--c-surface);
  font-weight: 600; cursor: pointer; transition: background var(--transition), border-color var(--transition);
}
.segmented span:hover { border-color: var(--c-accent); }
.segmented input:checked + span { background: var(--c-accent); border-color: var(--c-accent); color: var(--c-on-accent); }
.segmented input:focus-visible + span { outline: 3px solid var(--c-focus); outline-offset: 2px; }
.segmented input:disabled + span { opacity: 0.5; cursor: not-allowed; }
.check { display: flex; gap: var(--space-2); align-items: flex-start; font-weight: 600; cursor: pointer; }
.check input { width: 1.2rem; height: 1.2rem; margin: 0.2rem 0 0; accent-color: var(--c-accent); flex: none; }
.range-row { display: flex; align-items: center; gap: var(--space-3); }
.range-row input[type="range"] { flex: 1; accent-color: var(--c-accent); min-height: 44px; }
.range-row output { min-width: 3.2ch; text-align: right; font-weight: 700; font-variant-numeric: tabular-nums; }
.color-input { width: 52px; height: 44px; padding: 2px; border: 1px solid var(--c-border-strong); border-radius: var(--radius-sm); background: var(--c-surface); }
.dims { display: grid; grid-template-columns: 1fr auto 1fr; gap: var(--space-2); align-items: end; }
.dims__x { padding-bottom: 0.65rem; color: var(--c-text-muted); font-weight: 700; }
.quick-actions { display: flex; flex-wrap: wrap; gap: var(--space-2); }

.actions { display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: center; }
.status { margin: 0; font-size: var(--fs-sm); color: var(--c-text-muted); min-height: 1.5em; }
.alert { display: flex; gap: var(--space-3); padding: var(--space-3) var(--space-4); border-radius: var(--radius); border: 1px solid; font-weight: 550; }
.alert p { margin: 0; }
.alert--error { background: var(--c-danger-bg); border-color: var(--c-danger-border); color: var(--c-danger-text); }
.alert--warning { background: var(--c-warn-bg); border-color: var(--c-warn-border); color: var(--c-warn-text); }
.alert--success { background: var(--c-success-bg); border-color: var(--c-success-border); color: var(--c-success-text); }
.alert .icon { margin-top: 0.15em; }
.alert ul { margin: var(--space-1) 0 0; padding-left: 1.2rem; }

.preview { display: grid; gap: var(--space-2); margin: 0; }
.preview__frame {
  display: grid; place-items: center; min-height: 10rem; max-height: 26rem; overflow: hidden;
  border: 1px solid var(--c-border); border-radius: var(--radius);
  background-color: var(--c-checker-a);
  background-image: conic-gradient(var(--c-checker-b) 25%, transparent 0 50%, var(--c-checker-b) 0 75%, transparent 0);
  background-size: 20px 20px;
}
.preview__frame img { max-height: 26rem; width: auto; object-fit: contain; }
.preview figcaption { font-size: var(--fs-sm); color: var(--c-text-muted); }

.result { border: 1px solid var(--c-success-border); background: var(--c-surface); border-radius: var(--radius-lg); padding: var(--space-4); }
@media (min-width: 640px) { .result { padding: var(--space-5); } }
.result__title { display: flex; align-items: center; gap: var(--space-2); font-size: var(--fs-h3); color: var(--c-success-text); }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr)); gap: var(--space-3); margin: 0 0 var(--space-4); }
.stat { background: var(--c-surface-2); border-radius: var(--radius); padding: var(--space-3) var(--space-4); }
.stat dt { font-size: var(--fs-sm); color: var(--c-text-muted); font-weight: 600; }
.stat dd { margin: 0; font-size: 1.25rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat--good dd { color: var(--c-success-text); }
.stat--bad dd { color: var(--c-danger-text); }

.big-result { background: var(--c-accent-soft); border-radius: var(--radius-lg); padding: var(--space-5); text-align: center; }
.big-result__label { margin: 0 0 var(--space-1); font-weight: 600; color: var(--c-text-muted); }
.big-result__value { margin: 0; font-size: clamp(2rem, 1.5rem + 2.5vw, 3rem); font-weight: 750; color: var(--c-accent); font-variant-numeric: tabular-nums; line-height: 1.15; word-break: break-all; }
.big-result__detail { margin: var(--space-2) 0 0; color: var(--c-text-muted); font-family: var(--font-mono); font-size: 0.9375rem; word-break: break-word; }
.calc-grid { display: grid; gap: var(--space-5); }
@media (min-width: 760px) { .calc-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.calc-card { border: 1px solid var(--c-border); border-radius: var(--radius-lg); padding: var(--space-4); }
.calc-card legend { font-size: var(--fs-h3); }
.compare-verdict { font-weight: 650; text-align: center; margin: 0; }

.file-list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-2); counter-reset: file; }
.file-list__item {
  counter-increment: file; display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: var(--space-3); align-items: center;
  padding: var(--space-3); border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface);
}
.file-list__item::before { content: counter(file); width: 2rem; height: 2rem; display: grid; place-items: center; border-radius: 50%; background: var(--c-surface-2); font-weight: 700; font-size: var(--fs-sm); }
.file-list__item.is-error { border-color: var(--c-danger-border); background: var(--c-danger-bg); }
.file-list__name { margin: 0; font-weight: 650; overflow-wrap: anywhere; }
.file-list__meta { margin: 0; font-size: var(--fs-sm); color: var(--c-text-muted); }
.file-list__item.is-error .file-list__meta { color: var(--c-danger-text); }
.file-list__actions { display: flex; gap: var(--space-1); }
.download-list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-2); }
.download-list li { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: var(--space-2); padding: var(--space-2) var(--space-3); border: 1px solid var(--c-border); border-radius: var(--radius); }
.download-list .meta { font-size: var(--fs-sm); color: var(--c-text-muted); }
.page-summary { font-size: var(--fs-sm); color: var(--c-text-muted); margin: 0; }

.tool-content { padding-top: var(--space-5); }
.tool-content h2 { margin-top: var(--space-6); }
.tool-content h2:first-child { margin-top: 0; }

/* 7. Movimiento reducido e impresión ---------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  /* Con «reducir movimiento» no se anulan todas las animaciones: se quita el movimiento (desplazar,
     girar, escalar) y se conservan los fundidos y los cambios de color, que no marean. Cada animación
     con movimiento lo toma de variables (--rise, --lift…) que aquí valen 0; ver la sección 24. */
  html { scroll-behavior: auto !important; }
  .btn.is-busy::after { animation: none; border-right-color: var(--c-on-accent); opacity: 0.6; }
  .page-card__thumb img, .level-meter__bar { transition: none; }
}
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
@media print {
  .site-header, .site-footer, .skip-link, .ad-slot, .tool-shell, .related { display: none !important; }
  body { background: #fff; color: #000; }
  a { color: #000; }
}

/* Ajustes de formularios y tabla de equivalencias */
.check + .check { margin-top: var(--space-2); }
fieldset > .check { padding-block: 0.35rem; }
.equivalences { margin-top: var(--space-5); }
.equivalences summary { cursor: pointer; font-weight: 650; color: var(--c-accent); padding-block: var(--space-2); width: max-content; max-width: 100%; }
.equivalences .table-wrap { margin-top: var(--space-3); }
.tool-panel > .check { margin-top: var(--space-4); }
.big-result + .actions, .field + .actions, fieldset + .actions, .field + .field, .actions + .field { margin-top: var(--space-4); }
.calc-card[hidden] { display: none; }
/* Los títulos de resultado reciben el foco para que los lectores de pantalla los anuncien; no necesitan contorno. */
[data-result-title]:focus { outline: none; }

/* 8. Herramientas añadidas en octubre de 2026 ---------------------------------- */
.mono { font-family: var(--font-mono); }
.btn[aria-pressed="true"] { background: var(--c-accent-soft); border-color: var(--c-accent); color: var(--c-text); }

/* Listas con miniatura (imágenes a PDF) */
.file-list--thumbs .file-list__item { grid-template-columns: auto auto minmax(0, 1fr) auto; }
.file-list__thumb { width: 3.25rem; height: 3.25rem; object-fit: cover; border-radius: var(--radius-sm); border: 1px solid var(--c-border); background: var(--c-surface-2); }
/* Varias imágenes a la vez en el conversor, el compresor y el redimensionador */
.batch-list { max-height: 28rem; overflow-y: auto; align-content: start; padding-right: var(--space-1); }
.result [data-result-list] { margin-bottom: var(--space-4); }
@media (max-width: 599.98px) {
  .result [data-result-list] .file-list__item { grid-template-columns: auto minmax(0, 1fr); }
  .result [data-result-list] .file-list__actions { grid-column: 2; }
}
@media (max-width: 479.98px) {
  .file-list--thumbs .file-list__item { grid-template-columns: auto minmax(0, 1fr); }
  .file-list--thumbs .file-list__item::before { display: none; }
  .file-list--thumbs .file-list__actions { grid-column: 1 / -1; justify-content: flex-end; }
}

/* Cuadrícula de páginas (ordenar PDF, PDF a imágenes) */
.page-grid { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-3); grid-template-columns: repeat(auto-fill, minmax(9.5rem, 1fr)); }
.page-card { display: grid; gap: var(--space-2); align-content: start; padding: var(--space-2); border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface); }
.page-card__thumb { position: relative; display: grid; place-items: center; aspect-ratio: 1; overflow: hidden; border-radius: var(--radius-sm); background: var(--c-surface-2); }
.page-card__thumb img { position: absolute; inset: 0; margin: auto; max-width: 100%; max-height: 100%; box-shadow: var(--shadow-sm); background: #fff; transition: transform var(--transition); }
.page-card__thumb[data-rotation="90"] img { transform: rotate(90deg); }
.page-card__thumb[data-rotation="180"] img { transform: rotate(180deg); }
.page-card__thumb[data-rotation="270"] img { transform: rotate(270deg); }
.page-card__placeholder { font-size: 1.5rem; font-weight: 700; color: var(--c-text-muted); }
.page-card__label { margin: 0; font-size: var(--fs-sm); font-weight: 650; text-align: center; }
.page-card__actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 2px; }
.page-card__actions .btn--icon { min-width: 36px; min-height: 36px; padding: 0.3rem; }
.page-card__actions .icon--up, .page-card__actions .icon--down { transform: rotate(-90deg); }
.page-card.is-deleted .page-card__thumb { opacity: 0.35; }
.page-card.is-deleted .page-card__label { text-decoration: line-through; color: var(--c-danger-text); }
.page-card .check { justify-content: center; font-size: var(--fs-sm); }
/* Arrastrar páginas: el asa (seis puntos) también sirve en pantallas táctiles. */
.page-card { position: relative; }
.page-grid:not(.is-sorting) .page-card { cursor: grab; }
.page-card__grip { position: absolute; top: 4px; left: 4px; z-index: 1; width: 28px; height: 28px; border-radius: var(--radius-sm); touch-action: none; cursor: grab;
  box-sizing: border-box; padding: 5px 6px; background: radial-gradient(circle, var(--c-text-muted) 1.6px, transparent 2px) 0 0 / 8px 6px repeat content-box; }
.page-grid.is-sorting, .page-grid.is-sorting * { cursor: grabbing; user-select: none; }
.page-card.is-dragging { opacity: 0.6; outline: 2px dashed var(--c-accent); outline-offset: 2px; }
.page-card .btn { cursor: pointer; }

/* Separación entre grupos de botones y resultados */
.actions + .quick-actions, .quick-actions + .actions { margin-top: var(--space-3); }
.actions + .stats, .actions + .actions { margin-top: var(--space-3); }
.file-info + .actions, .actions + .page-summary, .page-summary + .page-grid, .page-grid + .actions,
.field__hint + .actions, .actions + .file-list, .file-list + .page-summary, .page-summary + .tool-grid, .tool-grid + .actions { margin-top: var(--space-4); }

/* Barra de progreso */
.progress { width: 100%; height: 0.75rem; accent-color: var(--c-accent); }

/* Teclado */
.kb-capture { display: block; width: 100%; padding: var(--space-4); border: 2px dashed var(--c-border-strong); border-radius: var(--radius-lg); background: var(--c-surface-2); color: var(--c-text); text-align: center; font-weight: 650; cursor: pointer; }
.kb-capture:focus-visible, .kb-capture.is-active { outline: none; border-style: solid; border-color: var(--c-accent); background: var(--c-accent-soft); }
.kb-wrap { overflow-x: auto; padding-bottom: var(--space-2); }
.kb { display: flex; gap: 0.9rem; width: max-content; font-size: 0.75rem; }
.kb__block { display: grid; gap: 0.25rem; align-content: start; }
.kb__row { display: flex; gap: 0.25rem; }
.kb__row--gap { margin-bottom: 0.5rem; }
.kb__key {
  display: grid; place-items: center; flex: none; width: 2.4rem; height: 2.4rem; padding: 0 0.15rem; border: 1px solid var(--c-border-strong);
  border-radius: 5px; background: var(--c-surface); color: var(--c-text); font-weight: 600; line-height: 1.1; text-align: center; white-space: nowrap; overflow: hidden;
}
.kb__key--spacer { visibility: hidden; }
.kb__key--small { font-size: 0.6rem; white-space: normal; line-height: 1.05; }
.kb__key--w125 { width: 3.05rem; }
.kb__key--w15 { width: 3.7rem; }
.kb__key--w175 { width: 4.35rem; }
.kb__key--w2 { width: 5.05rem; }
.kb__key--w225 { width: 5.7rem; }
.kb__key--w275 { width: 7rem; }
.kb__key--w625 { width: 15.95rem; }
.kb__key--tall { height: 5.05rem; }
.kb__key.is-tested { background: var(--c-success-bg); border-color: var(--c-success-border); color: var(--c-success-text); }
.kb__key.is-down { background: var(--c-accent); border-color: var(--c-accent); color: var(--c-on-accent); }
.key-log { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--space-2); min-height: 2.25rem; }
.key-log li { padding: 0.2rem 0.55rem; border-radius: var(--radius-sm); background: var(--c-surface-2); font-family: var(--font-mono); font-size: var(--fs-sm); }

/* Ratón */
.test-area { display: grid; place-items: center; min-height: 14rem; padding: var(--space-4); border: 2px dashed var(--c-border-strong); border-radius: var(--radius-lg); background: var(--c-surface-2); text-align: center; touch-action: none; user-select: none; }
.test-area:focus-visible { outline: 3px solid var(--c-focus); outline-offset: 2px; }
.test-area p { margin: 0; }
.mouse-buttons { display: grid; gap: var(--space-3); grid-template-columns: repeat(auto-fit, minmax(8.5rem, 1fr)); margin: 0; }
.mouse-button { padding: var(--space-3); border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface); }
.mouse-button dt { font-weight: 650; }
.mouse-button dd { margin: 0; font-size: var(--fs-sm); color: var(--c-text-muted); }
.mouse-button dd strong { font-size: 1.25rem; color: var(--c-text); font-variant-numeric: tabular-nums; }
.mouse-button.is-down { border-color: var(--c-accent); background: var(--c-accent-soft); }
.mouse-button.is-warning { border-color: var(--c-danger-border); background: var(--c-danger-bg); }
.mouse-button.is-warning dd { color: var(--c-danger-text); }

/* Prueba de monitor a pantalla completa */
.screen-test { position: fixed; inset: 0; z-index: 1000; display: grid; place-items: end center; padding: var(--space-6); cursor: none; }
.screen-test[hidden] { display: none; }
.screen-test__hint { margin: 0; padding: var(--space-2) var(--space-4); border-radius: var(--radius); background: rgb(0 0 0 / 0.7); color: #fff; font-size: var(--fs-sm); transition: opacity 600ms ease; }
.screen-test__hint.is-faded { opacity: 0; }
.swatch--black { background: #000; }
.swatch--white { background: #fff; }
.swatch--red { background: #f00; }
.swatch--green { background: #0f0; }
.swatch--blue { background: #00f; }
.swatch--gray { background: #808080; }
.swatch--gradient { background: linear-gradient(90deg, #000, #fff); }
.swatch-btn__chip { width: 1.1rem; height: 1.1rem; border-radius: 4px; border: 1px solid var(--c-border-strong); }

/* Medidor de nivel de audio */
.level-meter { position: relative; height: 1.25rem; border-radius: 999px; background: var(--c-surface-2); border: 1px solid var(--c-border); overflow: hidden; }
.level-meter__bar { position: absolute; inset: 0; transform-origin: left center; transform: scaleX(0); background: var(--c-accent); }
.audio-player { width: 100%; }

/* Contraseñas y hashes */
.secret-output { display: block; width: 100%; padding: var(--space-4); border: 1px solid var(--c-border-strong); border-radius: var(--radius); background: var(--c-surface-2); font-family: var(--font-mono); font-size: clamp(1rem, 0.9rem + 0.8vw, 1.375rem); overflow-wrap: anywhere; word-break: break-all; min-height: 3.5rem; margin: 0; }
.strength { display: grid; grid-template-columns: repeat(4, 1fr); gap: 4px; }
.strength span { height: 0.4rem; border-radius: 999px; background: var(--c-surface-2); border: 1px solid var(--c-border); }
.strength[data-level="1"] span:nth-child(-n+1) { background: var(--c-danger-text); }
.strength[data-level="2"] span:nth-child(-n+2) { background: var(--c-warn-border); }
.strength[data-level="3"] span:nth-child(-n+3) { background: var(--c-success-border); }
.strength[data-level="4"] span { background: var(--c-success-text); }
.secret-list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-2); }
.secret-list li { display: flex; gap: var(--space-2); align-items: center; justify-content: space-between; padding: var(--space-2) var(--space-3); border: 1px solid var(--c-border); border-radius: var(--radius); }
.secret-list code { overflow-wrap: anywhere; word-break: break-all; min-width: 0; }
.hash-results { display: grid; gap: var(--space-3); margin: 0; }
.hash-results > div { padding: var(--space-3); border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface-2); }
.hash-results dt { font-weight: 650; display: flex; justify-content: space-between; align-items: center; gap: var(--space-2); flex-wrap: wrap; }
.hash-results dd { margin: var(--space-1) 0 0; font-family: var(--font-mono); overflow-wrap: anywhere; word-break: break-all; }

/* Metadatos */
.meta-list { display: grid; gap: var(--space-1) var(--space-4); grid-template-columns: minmax(0, max-content) minmax(0, 1fr); margin: 0; font-size: 0.9375rem; }
.meta-list dt { font-weight: 650; }
.meta-list dd { margin: 0; overflow-wrap: anywhere; }
.meta-cards { display: grid; gap: var(--space-3); }
.meta-card { display: grid; gap: var(--space-3); padding: var(--space-4); border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface); }
.meta-card__head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: var(--space-2); }
.meta-card__name { margin: 0; font-weight: 650; overflow-wrap: anywhere; }
.meta-card__tags { display: flex; flex-wrap: wrap; gap: var(--space-1); margin: 0; padding: 0; list-style: none; }
.meta-card__tags li { padding: 0.1rem 0.55rem; border-radius: 999px; font-size: var(--fs-sm); font-weight: 600; background: var(--c-warn-bg); color: var(--c-warn-text); border: 1px solid var(--c-warn-border); }
.meta-card__tags li.is-kept { background: var(--c-success-bg); color: var(--c-success-text); border-color: var(--c-success-border); }
.meta-card p { margin: 0; }

/* 9. Herramientas añadidas el 21 de octubre de 2026 ---------------------------- */
/* Separación uniforme entre bloques dentro de las zonas de trabajo y tarjetas de cálculo. */
[data-workspace] > * + *, [data-panel] > * + *, .calc-card > * + * { margin-top: var(--space-4); }
.tool-grid + .stats, .field + .stats { margin-top: var(--space-4); }
/* Recorte */
.crop-wrap { display: grid; place-items: center; padding: var(--space-3); border: 1px solid var(--c-border); border-radius: var(--radius); background-color: var(--c-checker-a); background-image: conic-gradient(var(--c-checker-b) 25%, transparent 0 50%, var(--c-checker-b) 0 75%, transparent 0); background-size: 20px 20px; }
.crop-stage { position: relative; display: inline-block; max-width: 100%; overflow: hidden; touch-action: none; user-select: none; line-height: 0; }
.crop-stage canvas { display: block; max-width: 100%; max-height: 65vh; width: auto; height: auto; }
.crop-box { position: absolute; outline: 2px solid #fff; box-shadow: 0 0 0 9999px rgb(0 0 0 / 0.45); cursor: move; }
.crop-box:focus-visible { outline: 3px solid var(--c-focus); }
/* Los tiradores quedan dentro del recuadro para poder agarrarlos aunque el recorte toque el borde de la imagen. */
.crop-handle { position: absolute; width: 20px; height: 20px; border-radius: 4px; background: #fff; border: 2px solid #0a6a70; }
.crop-handle--nw { left: -2px; top: -2px; cursor: nwse-resize; }
.crop-handle--ne { right: -2px; top: -2px; cursor: nesw-resize; }
.crop-handle--sw { left: -2px; bottom: -2px; cursor: nesw-resize; }
.crop-handle--se { right: -2px; bottom: -2px; cursor: nwse-resize; }
.crop-fields { display: grid; gap: var(--space-3); grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (min-width: 640px) { .crop-fields { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
.crop-fields .field + .field { margin-top: 0; }

/* Vista previa de iconos */
.icon-previews { display: flex; flex-wrap: wrap; gap: var(--space-4); align-items: flex-end; margin: 0; }
.icon-previews figure { margin: 0; display: grid; gap: var(--space-1); justify-items: center; font-size: var(--fs-sm); color: var(--c-text-muted); }
.icon-previews img { background-color: var(--c-checker-a); background-image: conic-gradient(var(--c-checker-b) 25%, transparent 0 50%, var(--c-checker-b) 0 75%, transparent 0); background-size: 8px 8px; border: 1px solid var(--c-border); }

/* Vista previa de páginas (marca de agua, numeración, firma) */
.page-preview-wrap { display: grid; place-items: center; padding: var(--space-3); border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface-2); }
.page-preview { position: relative; display: inline-block; max-width: 100%; line-height: 0; box-shadow: var(--shadow); }
.page-preview canvas { display: block; max-width: 100%; max-height: 75vh; width: auto; height: auto; background: #fff; }
.page-nav { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); }
.sig-overlay { position: absolute; cursor: move; outline: 2px dashed #0a6a70; outline-offset: 2px; touch-action: none; }
.sig-overlay:focus-visible { outline: 3px solid var(--c-focus); }
.sig-overlay img { display: block; width: 100%; height: 100%; pointer-events: none; }
.sig-overlay--placed { outline-style: solid; outline-color: var(--c-success-border); cursor: default; }
.sig-pad { display: block; width: 100%; max-width: 40rem; aspect-ratio: 5 / 2; border: 2px dashed var(--c-border-strong); border-radius: var(--radius); background: #fff; touch-action: none; cursor: crosshair; }
.sig-preview { display: grid; place-items: center; min-height: 5rem; max-width: 40rem; padding: var(--space-3); border: 1px solid var(--c-border); border-radius: var(--radius); background: #fff; }
.sig-preview img { max-width: 100%; max-height: 8rem; }

/* Filas de aparatos (consumo eléctrico) */
.device-rows { display: grid; gap: var(--space-3); margin: 0; padding: 0; list-style: none; }
.device-row { display: grid; gap: var(--space-2); grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); align-items: end; padding: var(--space-3); border: 1px solid var(--c-border); border-radius: var(--radius); }
.device-row .field + .field { margin-top: 0; }
.device-row__name { grid-column: 1 / -1; }
@media (min-width: 760px) {
  .device-row { grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) minmax(0, 1fr) auto; padding: var(--space-2) var(--space-3); }
  .device-row__name { grid-column: auto; }
}

/* Cámara */
.video-frame { display: grid; place-items: center; aspect-ratio: 16 / 9; overflow: hidden; border-radius: var(--radius); background: #000; }
.video-frame video { width: 100%; height: 100%; object-fit: contain; }
.video-frame.is-mirrored video { transform: scaleX(-1); }

/* Mandos */
.pad-sticks { display: flex; flex-wrap: wrap; gap: var(--space-5); }
.pad-stick { display: grid; gap: var(--space-2); justify-items: center; margin: 0; }
.stick { position: relative; width: 9rem; height: 9rem; border-radius: 50%; border: 2px solid var(--c-border-strong); background: var(--c-surface-2); }
.stick__zone { position: absolute; left: 42.5%; top: 42.5%; width: 15%; height: 15%; border-radius: 50%; border: 1px dashed var(--c-text-muted); }
.stick__dot { position: absolute; left: 50%; top: 50%; width: 1.25rem; height: 1.25rem; margin: -0.625rem 0 0 -0.625rem; border-radius: 50%; background: var(--c-accent); }
.stick.is-pressed { border-color: var(--c-accent); }
.pad-stick figcaption { font-size: var(--fs-sm); font-weight: 650; text-align: center; font-variant-numeric: tabular-nums; }
.pad-buttons { display: grid; gap: var(--space-2); grid-template-columns: repeat(auto-fill, minmax(8rem, 1fr)); margin: 0; padding: 0; list-style: none; }
.pad-buttons li { display: flex; justify-content: space-between; gap: var(--space-2); padding: var(--space-2) var(--space-3); border: 1px solid var(--c-border); border-radius: var(--radius-sm); font-size: var(--fs-sm); font-weight: 600; }
.pad-buttons li.is-down { background: var(--c-accent); border-color: var(--c-accent); color: var(--c-on-accent); }
.pad-buttons li.is-tested:not(.is-down) { background: var(--c-success-bg); border-color: var(--c-success-border); color: var(--c-success-text); }

/* Código QR */
.qr-output { display: grid; place-items: center; gap: var(--space-2); padding: var(--space-4); border: 1px solid var(--c-border); border-radius: var(--radius); background: #fff; color: #17202b; }
.qr-output canvas { width: min(100%, 18rem); height: auto; image-rendering: pixelated; }
.qr-output p { margin: 0; font-size: var(--fs-sm); text-align: center; overflow-wrap: anywhere; }

/* 10. Herramientas añadidas el 22 de octubre de 2026 ---------------------------- */
/* Ocultar datos en una imagen */
.redact-stage { cursor: crosshair; }
.redact-zone { position: absolute; outline: 2px dashed #fff; box-shadow: 0 0 0 1px #0a6a70, inset 0 0 0 1px #0a6a70; cursor: move; }
.redact-zone:focus-visible { outline: 3px solid var(--c-focus); }
.redact-zone__remove { position: absolute; top: -2px; right: -2px; width: 24px; height: 24px; display: grid; place-items: center; padding: 0; border: 2px solid #0a6a70; border-radius: 4px; background: #fff; color: #17202b; font-size: 1rem; font-weight: 700; line-height: 1; cursor: pointer; }
.redact-zone__remove:focus-visible { outline: 3px solid var(--c-focus); }
.redact-zone .crop-handle--se { right: -2px; bottom: -2px; }

/* Escanear documentos */
.scan-editor { display: grid; gap: var(--space-4); }
@media (min-width: 900px) { .scan-editor { grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); align-items: start; } }
.scan-stage canvas { max-height: 70vh; }
.scan-handle { position: absolute; width: 28px; height: 28px; margin: -14px 0 0 -14px; padding: 0; border: 3px solid #0a6a70; border-radius: 50%; background: rgb(255 255 255 / 0.85); cursor: grab; touch-action: none; }
.scan-handle:focus-visible { outline: 3px solid var(--c-focus); outline-offset: 2px; }
.scan-result { margin: 0; display: grid; gap: var(--space-2); justify-items: center; padding: var(--space-3); border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface-2); }
.scan-result canvas { display: block; max-width: 100%; max-height: 60vh; background: #fff; box-shadow: var(--shadow); }
.scan-result figcaption { font-size: var(--fs-sm); color: var(--c-text-muted); }
.file-list__item.is-current { border-color: var(--c-accent); box-shadow: inset 0 0 0 1px var(--c-accent); }
.file-list__actions .btn--sm { white-space: nowrap; }

/* Extraer texto */
.text-output { width: 100%; min-height: 16rem; font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: var(--fs-sm); line-height: 1.5; resize: vertical; }

/* Frecuencia de refresco */
.motion-strip { display: block; width: 100%; height: 6rem; border-radius: var(--radius); }

/* Pantalla táctil */
.touch-area { position: relative; }
.touch-area canvas { display: block; width: 100%; height: min(60vh, 32rem); border: 1px solid var(--c-border); border-radius: var(--radius); touch-action: none; user-select: none; -webkit-user-select: none; -webkit-touch-callout: none; }
.touch-area.is-fullscreen { background: #fff; }
.touch-area.is-fullscreen canvas { width: 100vw; height: 100vh; border: 0; border-radius: 0; }
.touch-area__exit { position: absolute; top: var(--space-3); right: var(--space-3); }

/* Información del equipo */
.info-groups { display: grid; gap: var(--space-5); }
@media (min-width: 900px) { .info-groups { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.info-list { margin: 0; display: grid; gap: 0; border: 1px solid var(--c-border); border-radius: var(--radius); }
.info-list > div { display: grid; gap: var(--space-1); padding: var(--space-2) var(--space-3); border-top: 1px solid var(--c-border); }
.info-list > div:first-child { border-top: 0; }
@media (min-width: 480px) { .info-list > div { grid-template-columns: minmax(0, 2fr) minmax(0, 3fr); gap: var(--space-3); } }
.info-list dt { font-weight: 650; }
.info-list dd { margin: 0; overflow-wrap: anywhere; }
.info-list__note { display: block; font-size: var(--fs-sm); color: var(--c-text-muted); }

/* Comprobador de contraseñas (cinco niveles) */
.strength--5 { grid-template-columns: repeat(5, 1fr); }
.strength--5[data-level="0"] span:nth-child(-n+1) { background: var(--c-danger-text); }
.strength--5[data-level="1"] span:nth-child(-n+2) { background: var(--c-danger-text); }
.strength--5[data-level="2"] span:nth-child(-n+3) { background: var(--c-warn-border); }
.strength--5[data-level="3"] span:nth-child(-n+4) { background: var(--c-success-border); }
.strength--5[data-level="4"] span { background: var(--c-success-text); }

/* 11. Cuarta tanda de herramientas (texto, color, subredes, códigos de barras, tests, grabador y audio) */
.text-area { min-height: 12rem; resize: vertical; line-height: 1.5; }
.select--auto { width: auto; min-width: 12rem; }
.check-row { display: flex; flex-wrap: wrap; gap: var(--space-2) var(--space-5); }
.check-row .check + .check { margin-top: 0; }
.mode-panel[hidden] { display: none; }
.stats--live .stat dd { font-size: 1.5rem; }

/* Contador de palabras */
.word-freq { display: grid; gap: var(--space-1); margin: var(--space-3) 0 0; padding-left: 1.5rem; }
.word-freq li { display: flex; justify-content: space-between; gap: var(--space-3); max-width: 24rem; }
.word-freq__count { color: var(--c-text-muted); font-variant-numeric: tabular-nums; }
.data-table tr.is-over td { color: var(--c-danger-text); font-weight: 650; }

/* Comparar textos */
.diff-result > * + * { margin-top: var(--space-4); }
.diff-legend { display: flex; gap: var(--space-4); font-size: var(--fs-sm); font-weight: 650; }
.diff-legend__del { color: var(--c-danger-text); }
.diff-legend__ins { color: var(--c-success-text); }
.diff-view { max-height: 70vh; overflow: auto; border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface); font-family: var(--font-mono); font-size: var(--fs-sm); line-height: 1.55; }
.diff-row { display: grid; grid-template-columns: 3.2rem 3.2rem 1.4rem minmax(0, 1fr); }
.diff-row__no { padding: 0 var(--space-2); text-align: right; color: var(--c-text-muted); user-select: none; border-right: 1px solid var(--c-border); font-variant-numeric: tabular-nums; }
.diff-row__sign { text-align: center; user-select: none; font-weight: 700; }
.diff-row__text { padding-right: var(--space-3); white-space: pre-wrap; overflow-wrap: anywhere; min-width: 0; }
.diff-row--delete { background: var(--c-danger-bg); color: var(--c-danger-text); }
.diff-row--insert { background: var(--c-success-bg); color: var(--c-success-text); }
.diff-row del, .diff-row ins { border-radius: 3px; padding: 0 1px; color: inherit; }
.diff-row del { background: var(--c-danger-border); text-decoration: line-through; text-decoration-thickness: 1px; }
.diff-row ins { background: var(--c-success-border); text-decoration: none; }
.diff-row--gap { display: block; padding: var(--space-1) var(--space-3); color: var(--c-text-muted); background: var(--c-surface-2); text-align: center; font-family: var(--font-sans); }
@media (max-width: 479.98px) { .diff-row { grid-template-columns: 2.4rem 2.4rem 1.2rem minmax(0, 1fr); } }

/* Selector de colores */
.color-row { display: flex; gap: var(--space-3); align-items: flex-start; }
.color-row__field { flex: 1; min-width: 0; }
.color-input--lg { width: 64px; height: 64px; flex: none; margin-top: 1.6rem; }
.color-formats { display: grid; gap: var(--space-1); margin: 0; }
.color-formats > div { display: grid; grid-template-columns: 3.5rem minmax(0, 1fr); gap: var(--space-2); align-items: center; }
.color-formats dt { font-weight: 650; font-size: var(--fs-sm); color: var(--c-text-muted); }
.color-formats dd { margin: 0; display: flex; align-items: center; justify-content: space-between; gap: var(--space-2); min-width: 0; }
.color-formats dd .mono { overflow-wrap: anywhere; min-width: 0; }
.contrast > * + * { margin-top: var(--space-4); }
.contrast__grid { display: grid; gap: var(--space-4); }
@media (min-width: 760px) { .contrast__grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); } }
.contrast-preview { --preview-fg: #0a6a70; --preview-bg: #fff; display: grid; gap: var(--space-3); align-content: center; padding: var(--space-5); border: 1px solid var(--c-border); border-radius: var(--radius-lg); color: var(--preview-fg); background: var(--preview-bg); }
.contrast-preview p { margin: 0; }
.contrast-preview__large { font-size: 1.5rem; font-weight: 700; }
.contrast-preview__ui { display: flex; align-items: center; gap: var(--space-3); }
.contrast-preview__btn { display: inline-block; padding: 0.4rem 1rem; border: 2px solid var(--preview-fg); border-radius: var(--radius-sm); font-weight: 650; }
.wcag-list { list-style: none; margin: var(--space-3) 0 0; padding: 0; display: grid; gap: var(--space-1); }
.wcag-list li { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: var(--space-2); align-items: center; padding: var(--space-2) var(--space-3); border-radius: var(--radius-sm); }
.wcag-list li.is-pass { background: var(--c-success-bg); color: var(--c-success-text); }
.wcag-list li.is-fail { background: var(--c-danger-bg); color: var(--c-danger-text); }
.alert .suggestion { display: flex; align-items: center; gap: var(--space-2); margin-top: var(--space-2); }
.swatch-dot { --dot: #000; width: 1.5rem; height: 1.5rem; border-radius: 50%; background: var(--dot); border: 1px solid var(--c-border-strong); }
.pick-canvas canvas { display: block; max-width: 100%; height: auto; cursor: crosshair; border: 1px solid var(--c-border); border-radius: var(--radius); }
.equivalences > * + * { margin-top: var(--space-3); }

/* Subredes */
.subnet-table th { width: 40%; text-align: left; font-weight: 650; }
.vlsm-list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-2); }
.vlsm-row { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) auto; gap: var(--space-2); align-items: end; }
.vlsm-row .field + .field { margin-top: 0; }

/* Códigos de barras */
.preview__frame--plain { background: #fff; padding: var(--space-4); }
.barcode-preview img { max-width: 100%; height: auto; image-rendering: pixelated; }

/* Clics por segundo y tiempo de reacción */
.click-area, .reaction-area {
  display: grid; place-items: center; align-content: center; gap: var(--space-2); width: 100%; min-height: 16rem;
  padding: var(--space-5); border: 2px dashed var(--c-border-strong); border-radius: var(--radius-lg);
  background: var(--c-surface-2); color: var(--c-text); text-align: center; cursor: pointer;
  touch-action: manipulation; user-select: none; -webkit-user-select: none; -webkit-tap-highlight-color: transparent;
}
.click-area:focus-visible, .reaction-area:focus-visible { outline: 3px solid var(--c-focus); outline-offset: 2px; }
.click-area__title, .reaction-area__title { font-size: clamp(1.5rem, 1.2rem + 1.5vw, 2.25rem); font-weight: 750; }
.click-area__hint, .reaction-area__hint { color: var(--c-text-muted); max-width: 32rem; }
.click-area.is-running { border-style: solid; border-color: var(--c-accent); background: var(--c-accent-soft); }
.click-area.is-done { border-style: solid; }
.reaction-area[data-state="waiting"] { background: #b3261e; border-color: #b3261e; color: #fff; }
.reaction-area[data-state="go"] { background: #1a7f37; border-color: #1a7f37; color: #fff; }
.reaction-area[data-state="waiting"] .reaction-area__hint, .reaction-area[data-state="go"] .reaction-area__hint { color: #fff; }
.attempts { display: flex; flex-wrap: wrap; gap: var(--space-2); margin: 0; padding: 0; list-style: none; }
.attempts li { padding: var(--space-1) var(--space-3); border-radius: 999px; background: var(--c-surface-2); border: 1px solid var(--c-border); font-variant-numeric: tabular-nums; }
.attempts .attempts__item--bad { background: var(--c-danger-bg); color: var(--c-danger-text); border-color: var(--c-danger-border); }

/* Grabador de pantalla */
.recorder-bar { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-3); padding: var(--space-3) var(--space-4); border: 1px solid var(--c-danger-border); border-radius: var(--radius); background: var(--c-danger-bg); }
.recorder-bar[hidden] { display: none; }
.recorder-bar__dot { width: 0.85rem; height: 0.85rem; border-radius: 50%; background: #d1242f; }
.recorder-bar__time { font-size: 1.375rem; font-weight: 750; font-variant-numeric: tabular-nums; }
.recorder-bar__size { flex: 1; color: var(--c-text-muted); font-variant-numeric: tabular-nums; }
.recorder-video { display: block; width: 100%; max-height: 65vh; border-radius: var(--radius); background: #000; }
@media (prefers-reduced-motion: no-preference) {
  .recorder-bar__dot { animation: rec-blink 1.2s steps(2, start) infinite; }
}
@keyframes rec-blink { to { visibility: hidden; } }

/* Recortar audio */
.waveform { border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface-2); padding: var(--space-2); }
.waveform__canvas { display: block; width: 100%; height: 9rem; cursor: pointer; touch-action: none; }
.field input[type="range"] { width: 100%; accent-color: var(--c-accent); min-height: 44px; }

/* 12. Diagnóstico guiado, rutas de aprendizaje y cuestionarios ------------------ */
.hub-note { margin: var(--space-6) 0; }
.icon--flip { transform: scaleX(-1); }

/* Diagnóstico */
.diag__bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--space-3); }
.diag__bar[hidden] { display: none; }
.diag__step { margin: 0; font-weight: 700; color: var(--c-text-muted); }
.diag__path { margin: 0; padding: var(--space-3) var(--space-4) var(--space-3) var(--space-6); border-radius: var(--radius); background: var(--c-surface-2); font-size: var(--fs-sm); display: grid; gap: var(--space-1); }
.diag__path-q { color: var(--c-text-muted); }
.diag-node { scroll-margin-top: calc(var(--header-h) + var(--space-4)); }
.diag-node:focus { outline: none; }
.diag:not(.is-enhanced) .diag-node + .diag-node { border-top: 1px solid var(--c-border); padding-top: var(--space-5); }
.diag-node > * + * { margin-top: var(--space-3); }
.diag-node__title { font-size: var(--fs-h2); line-height: var(--lh-tight); margin: 0; }
.diag-node__kicker { display: flex; align-items: center; gap: var(--space-2); margin: 0; font-weight: 700; color: var(--c-success-text); }
.diag-options { list-style: none; margin: var(--space-4) 0 0; padding: 0; display: grid; gap: var(--space-2); }
.diag-option {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); min-height: 52px;
  padding: var(--space-3) var(--space-4); border: 1px solid var(--c-border-strong); border-radius: var(--radius);
  background: var(--c-surface); color: var(--c-text); font-weight: 600; text-decoration: none;
  transition: border-color var(--transition), background var(--transition);
}
.diag-option:hover { border-color: var(--c-accent); background: var(--c-accent-soft); }
.diag-option .icon { flex: none; color: var(--c-accent); }
.diag-steps { padding-left: 1.4rem; display: grid; gap: var(--space-2); }
.diag-node__more { font-size: var(--fs-h3); margin-top: var(--space-5); }
.diag-node__restart { font-size: var(--fs-sm); }

/* Rutas */
.route { margin-top: var(--space-6); margin-bottom: var(--space-6); }
.route > * + * { margin-top: var(--space-5); }
.route__progress { display: grid; gap: var(--space-2); padding: var(--space-4); border: 1px solid var(--c-border); border-radius: var(--radius-lg); background: var(--c-surface); }
.route__progress[hidden] { display: none; }
.route__progress p { margin: 0; font-weight: 700; }
.route__progress .link-btn { justify-self: start; font-size: var(--fs-sm); }
.route-steps { list-style: none; margin: 0; padding: 0; counter-reset: step; display: grid; gap: var(--space-3); }
.route-step {
  counter-increment: step; display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: var(--space-3); align-items: center;
  padding: var(--space-4); border: 1px solid var(--c-border); border-radius: var(--radius-lg); background: var(--c-surface);
}
.route-step::before {
  content: counter(step); display: grid; place-items: center; width: 2.25rem; height: 2.25rem; border-radius: 50%;
  background: var(--c-accent-soft); color: var(--c-accent); font-weight: 750;
}
.route-step.is-done { border-color: var(--c-success-border); }
.route-step.is-done::before { content: "✓"; background: var(--c-success-bg); color: var(--c-success-text); }
.route-step__kind { margin: 0; font-size: var(--fs-sm); color: var(--c-text-muted); font-weight: 600; }
.route-step__title { margin: 0; font-size: var(--fs-h3); line-height: var(--lh-tight); }
.route-step__note { margin: var(--space-1) 0 0; color: var(--c-text-muted); }
.route-step__done[hidden] { display: none; }
@media (max-width: 559.98px) {
  .route-step { grid-template-columns: auto minmax(0, 1fr); }
  .route-step__done { grid-column: 2; }
}
.route__quiz { padding: var(--space-5); border-radius: var(--radius-lg); background: var(--c-accent-soft); }
.route__quiz .btn { white-space: normal; text-align: center; max-width: 100%; }
.route__quiz h2 { display: flex; align-items: center; gap: var(--space-2); font-size: var(--fs-h3); margin: 0 0 var(--space-2); }

/* Cuestionarios */
.quiz > * + * { margin-top: var(--space-4); }
.quiz__progress { margin: 0; font-weight: 700; color: var(--c-text-muted); }
.quiz:not(.is-enhanced) .quiz-q + .quiz-q { border-top: 1px solid var(--c-border); padding-top: var(--space-5); }
.quiz-q__title { font-size: var(--fs-lg); font-weight: 700; line-height: 1.4; margin-bottom: var(--space-3); }
.quiz-options { display: grid; gap: var(--space-2); }
.quiz-option {
  display: flex; gap: var(--space-3); align-items: flex-start; padding: var(--space-3) var(--space-4);
  border: 1px solid var(--c-border-strong); border-radius: var(--radius); background: var(--c-surface); cursor: pointer; font-weight: 600;
}
.quiz-option:hover { border-color: var(--c-accent); }
.quiz-option input { width: 1.15rem; height: 1.15rem; margin-top: 0.2rem; accent-color: var(--c-accent); flex: none; }
.quiz-option:has(input:checked) { border-color: var(--c-accent); background: var(--c-accent-soft); }
.quiz-option:has(input:focus-visible) { outline: 3px solid var(--c-focus); outline-offset: 2px; }
.quiz-option.is-correct, .quiz-option.is-correct:has(input:checked) { border-color: var(--c-success-border); background: var(--c-success-bg); color: var(--c-success-text); }
.quiz-option.is-wrong, .quiz-option.is-wrong:has(input:checked) { border-color: var(--c-danger-border); background: var(--c-danger-bg); color: var(--c-danger-text); }
.quiz-option:has(input:disabled) { cursor: default; }
.quiz-feedback { margin-top: var(--space-3); padding: var(--space-3) var(--space-4); border-radius: var(--radius); border: 1px solid var(--c-danger-border); background: var(--c-danger-bg); }
.quiz-feedback.is-ok { border-color: var(--c-success-border); background: var(--c-success-bg); }
.quiz-feedback p { margin: 0; }
.quiz-feedback p + p { margin-top: var(--space-2); }
.quiz-feedback__verdict { font-weight: 750; }
.quiz-result > * + * { margin-top: var(--space-4); }
.quiz-result:focus { outline: none; }
.quiz-result__score { text-align: left; }
.quiz-outcome h3 { font-size: var(--fs-h3); margin: 0 0 var(--space-2); }
.quiz-tips { padding-left: 1.2rem; display: grid; gap: var(--space-2); }
.quiz-solutions { margin-bottom: var(--space-5); }
.quiz-solutions[hidden] { display: none; }
.quiz-solutions ol { padding-left: 1.4rem; display: grid; gap: var(--space-2); }

/* 13. Quinta tanda: vídeo, documentos e IA (22 de octubre de 2026) ------------- */
.preview__frame--media { background: #000; background-image: none; padding: 0; min-height: 0; }
.preview__frame--media video, .preview__frame--media img { display: block; width: 100%; max-height: 26rem; object-fit: contain; }
.preview__frame--media audio { width: 100%; margin: var(--space-3); }
[data-result-preview]:empty { display: none; }
.result [data-result-preview] { margin-block: var(--space-4); }
.compare { margin-top: var(--space-4); }
.compare__frames { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2); }
.compare__frames canvas { width: 100%; height: auto; border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface-2); }
.inpaint-stage { position: relative; margin-top: var(--space-4); touch-action: none; cursor: crosshair; user-select: none; line-height: 0; }
.inpaint-stage canvas { display: block; width: 100%; height: auto; border-radius: var(--radius); }
.inpaint-mask { position: absolute; inset: 0; opacity: 0.5; pointer-events: none; }
.audio-player { width: 100%; margin-block: var(--space-3); }
.stem-list { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--space-3); }
.stem-list__item { display: grid; gap: var(--space-2); align-items: center; padding: var(--space-3); border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface-2); }
.stem-list__item audio { width: 100%; }
.stem-list__name { margin: 0; font-weight: 700; }
@media (min-width: 720px) { .stem-list__item { grid-template-columns: 12rem 1fr auto; } }
.translate-langs { display: grid; grid-template-columns: 1fr auto 1fr; gap: var(--space-3); align-items: end; }
.translate-langs .field { margin: 0; }
.translate-langs .btn--icon { margin-bottom: 2px; }

/* 14. Portada: las cuatro secciones, cada una con su color ---------------------- */
.sections-home { padding-top: var(--space-2); }
.section-cards { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-4); }
/* Siete secciones: de dos en dos con la última a lo ancho y, en pantallas grandes, tres arriba y
   cuatro abajo (rejilla de 12 columnas). */
@media (min-width: 720px) { .section-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 720px) and (max-width: 1099.98px) { .section-card:last-child:nth-child(odd) { grid-column: 1 / -1; } }
@media (min-width: 1100px) {
  .section-cards { grid-template-columns: repeat(12, minmax(0, 1fr)); }
  .section-card { grid-column: span 4; }
  .section-card:nth-child(n+4) { grid-column: span 3; }
}
.section-card {
  display: flex; flex-direction: column; gap: var(--space-3); padding: var(--space-5);
  background: var(--c-surface); border: 1px solid var(--c-border); border-top: 4px solid var(--c-section);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}
.section-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.section-card__icon {
  display: inline-grid; place-items: center; width: 64px; height: 64px; border-radius: var(--radius-lg);
  background: var(--c-section); color: #ffffff;
}
.section-card__icon .icon { width: 30px; height: 30px; }
.section-card__title { margin: var(--space-1) 0 0; font-size: clamp(1.375rem, 1.2rem + 0.6vw, 1.625rem); }
.section-card__title a { color: var(--c-text); text-decoration: none; }
.section-card__title a:hover { color: var(--c-accent); }
.section-card__count { margin: 0; font-size: var(--fs-sm); font-weight: 700; color: var(--c-accent); }
.section-card__text { margin: 0; color: var(--c-text-muted); }
.section-card__links { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--space-2); }
.section-card__links a {
  display: inline-block; padding: 0.3rem 0.65rem; border-radius: 999px; font-size: var(--fs-sm); font-weight: 600;
  background: var(--c-accent-soft); color: var(--c-text); text-decoration: none;
}
.section-card__links a:hover { color: var(--c-accent); text-decoration: underline; }
.section-card__cta { margin-top: auto; align-self: flex-start; white-space: normal; text-align: left; }
@media (prefers-reduced-motion: reduce) { .section-card:hover { transform: none; } }

/* 15. Aviso de cookies ----------------------------------------------------------- */
.cookie-banner {
  position: fixed; inset: auto 0 0 0; z-index: 50; background: var(--c-surface);
  border-top: 1px solid var(--c-border-strong); box-shadow: 0 -6px 24px rgb(16 24 40 / 0.14);
  padding-block: var(--space-4);
}
.cookie-banner[hidden] { display: none; }
.cookie-banner__inner { display: grid; gap: var(--space-3); align-items: center; }
.cookie-banner__title { font-size: var(--fs-lg); margin: 0 0 var(--space-1); }
.cookie-banner p { margin: 0; font-size: var(--fs-sm); color: var(--c-text-muted); }
.cookie-banner a { color: var(--c-accent); font-weight: 600; }
/* «Rechazar» y «Aceptar» con el mismo aspecto: rechazar debe ser tan fácil como aceptar (AEPD). */
.cookie-banner__actions { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.cookie-banner__actions .btn { flex: 1 1 8rem; justify-content: center; }
@media (min-width: 800px) {
  .cookie-banner__inner { grid-template-columns: 1fr auto; gap: var(--space-5); }
  .cookie-banner__actions .btn { flex: 0 0 9rem; }
}

/* 16. Botón de tema: borde fino visible (≥ 3:1 con el fondo) y fondo oscuro translúcido. */
.theme-toggle { border-color: #8391a7; background: rgb(15 23 42 / 0.07); }
.theme-toggle:hover { border-color: #64748b; background: rgb(15 23 42 / 0.12); }
:root[data-theme="dark"] .theme-toggle { border-color: #7d8899; background: rgb(0 0 0 / 0.28); }
:root[data-theme="dark"] .theme-toggle:hover { border-color: #a8b3c2; background: rgb(0 0 0 / 0.4); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle { border-color: #7d8899; background: rgb(0 0 0 / 0.28); }
  :root:not([data-theme="light"]) .theme-toggle:hover { border-color: #a8b3c2; background: rgb(0 0 0 / 0.4); }
}

/* 17. «Tus herramientas más usadas» */
.chip--more { border-style: dashed; color: var(--c-accent); }
.chip--more .icon { color: currentColor; }
.most-used__actions { margin-top: var(--space-5); }
.most-used__about { margin-top: var(--space-7); max-width: var(--container-narrow); }

/* 18. Diálogo de confirmación de descargas grandes (móviles y ahorro de datos) */
.confirm-dialog { max-width: min(30rem, calc(100vw - 2rem)); padding: var(--space-5); border: 1px solid var(--c-border); border-radius: var(--radius-lg); background: var(--c-surface); color: var(--c-text); box-shadow: var(--shadow-lg); }
.confirm-dialog::backdrop { background: rgb(15 23 42 / 0.55); }
.confirm-dialog__body { display: flex; gap: var(--space-3); align-items: flex-start; }
.confirm-dialog__body > .icon { width: 28px; height: 28px; flex: none; color: var(--c-accent); }
.confirm-dialog__title { font-size: var(--fs-h3); margin: 0 0 var(--space-2); }
.confirm-dialog p { margin: 0; color: var(--c-text-muted); }
.confirm-dialog__actions { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-5); }

/* 19. Portada: título grande con degradado, fondo con los colores de las secciones y demostración */
.hero {
  --hero-blue: #2563eb; --hero-teal: #0f766e; --hero-violet: #7c3aed; --hero-amber: #b45309; --hero-rose: #be123c;
  --hero-glow: 0.09;
  --hero-extend: 0rem; /* cuánto continúa la luz por debajo de la portada */
  /* Sin isolation: así el desplegable del buscador (z-index 60) queda por encima de las tarjetas de
     secciones, y la luz (z-index -1) sigue por debajo de todo, sobre el fondo del body. */
  position: relative; overflow: hidden;
}
/* Las luces se colocan respecto a la altura de la portada (100% - --hero-extend), así conservan
   su tamaño y su sitio aunque la capa se alargue por debajo. */
.hero::before {
  content: ""; position: absolute; inset: 0 0 calc(-1 * var(--hero-extend)); z-index: -1; pointer-events: none;
  --h: calc(100% - var(--hero-extend));
  background:
    radial-gradient(38rem 26rem at 8% 0%, rgb(59 130 246 / var(--hero-glow)), transparent 70%),
    radial-gradient(30rem 22rem at 55% calc(var(--h) * 0.1), rgb(20 184 166 / var(--hero-glow)), transparent 70%),
    radial-gradient(34rem 24rem at 95% calc(var(--h) * 0.35), rgb(167 139 250 / var(--hero-glow)), transparent 70%),
    radial-gradient(30rem 20rem at 70% var(--h), rgb(245 158 11 / calc(var(--hero-glow) * 0.8)), transparent 70%),
    radial-gradient(28rem 20rem at 20% var(--h), rgb(244 63 94 / calc(var(--hero-glow) * 0.7)), transparent 70%);
}
/* Donde se puede recortar solo en horizontal, la luz naranja del borde inferior no se corta: sigue
   por debajo de la portada (la luz se apaga antes de 16rem) y se ve en los huecos entre las
   tarjetas de secciones, que van en una capa superior. */
@supports (overflow: clip) {
  .hero { overflow: visible; overflow-x: clip; --hero-extend: 16rem; }
}
.sections-home { position: relative; z-index: 1; }
:root[data-theme="dark"] .hero { --hero-blue: #60a5fa; --hero-teal: #2dd4bf; --hero-violet: #a78bfa; --hero-amber: #f59e0b; --hero-rose: #fb7185; --hero-glow: 0.14; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .hero { --hero-blue: #60a5fa; --hero-teal: #2dd4bf; --hero-violet: #a78bfa; --hero-amber: #f59e0b; --hero-rose: #fb7185; --hero-glow: 0.14; }
}
.hero__grid { display: grid; gap: var(--space-6); align-items: center; }
@media (min-width: 1000px) { .hero__grid { grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); gap: var(--space-7); } }
.hero__title {
  max-width: 16ch; font-size: clamp(2.25rem, 1.55rem + 3.1vw, 3.75rem); line-height: 1.05;
  letter-spacing: -0.03em; font-weight: 800; margin-bottom: var(--space-4);
}
.hero__accent { display: block; color: var(--hero-teal); }
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .hero__accent {
    background: linear-gradient(90deg, var(--hero-blue), var(--hero-teal) 30%, var(--hero-violet) 55%, var(--hero-amber) 80%, var(--hero-rose));
    -webkit-background-clip: text; background-clip: text; color: transparent;
    /* El degradado solo se pinta dentro de la caja de la línea: con el interlineado ajustado del
       titular, los rasgos que bajan (g, j, p, y) se cortaban. Se amplía la caja sin mover nada. */
    padding-bottom: 0.3em; margin-bottom: -0.3em;
  }
}

/* Demostración animada */
.hero-demo {
  position: relative; background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); padding: var(--space-5); display: grid; gap: var(--space-4);
}
.hero-demo__scene { margin: 0; display: grid; gap: var(--space-4); }
.hero-demo__scene[hidden] { display: none; }
.hero-demo figcaption { display: grid; gap: var(--space-2); justify-items: start; }
.hero-demo__title { margin: 0; font-size: var(--fs-lg); font-weight: 750; }
.hero-demo__text { margin: 0; color: var(--c-text-muted); font-size: var(--fs-sm); }
.demo-art {
  height: 12rem; border-radius: var(--radius); background: var(--c-surface-2); border: 1px solid var(--c-border);
  display: grid; place-items: center; overflow: hidden;
}
.hero-demo__controls { display: flex; align-items: center; gap: var(--space-3); }
.hero-demo__controls[hidden] { display: none; }
.hero-demo__pause .icon--play, .hero-demo.is-paused .hero-demo__pause .icon--pause { display: none; }
.hero-demo.is-paused .hero-demo__pause .icon--play { display: block; }
.hero-demo__dots { display: flex; gap: var(--space-1); }
.hero-demo__dot { width: 44px; height: 44px; border: 0; background: none; padding: 0; display: grid; place-items: center; cursor: pointer; }
.hero-demo__dot::before { content: ""; width: 10px; height: 10px; border-radius: 50%; background: var(--c-border-strong); transition: width var(--transition), background var(--transition); }
.hero-demo__dot[aria-pressed="true"]::before { width: 26px; border-radius: 999px; background: var(--c-accent); }
.hero-demo__dot:focus-visible { outline: 3px solid var(--c-focus); outline-offset: -6px; border-radius: var(--radius-sm); }

/* Escena 1: quitar el fondo (el fondo se desvanece y aparece la cuadrícula de transparencia) */
.demo-cutout {
  position: relative; width: 11rem; height: 9rem; border-radius: var(--radius);
  background-color: var(--c-checker-a);
  background-image: conic-gradient(var(--c-checker-b) 25%, transparent 0 50%, var(--c-checker-b) 0 75%, transparent 0);
  background-size: 16px 16px; overflow: hidden;
}
.demo-cutout__bg { position: absolute; inset: 0; background: linear-gradient(160deg, #7dd3fc, #34d399 60%, #15803d); }
.demo-cutout__subject { position: absolute; inset: 0; width: 100%; height: 100%; fill: #b45309; }
.is-active .demo-cutout__bg { animation: demo-fade-out 6s ease-in-out both; }
.is-active .demo-cutout__subject { animation: demo-pop 6s ease-in-out both; }

/* Escena 2: comprimir PDF (el tamaño baja y la barra se llena) */
.demo-pdf { display: grid; justify-items: center; gap: var(--space-2); width: 12rem; }
.demo-pdf__doc { width: 3.6rem; height: 4.5rem; fill: var(--c-surface); stroke: #dc2626; stroke-width: 3; }
.demo-pdf__doc .demo-pdf__fold { fill: none; }
.demo-pdf__doc text { fill: #dc2626; stroke: none; font: 800 15px var(--font-sans); }
.demo-pdf__sizes { position: relative; height: 1.6rem; width: 100%; text-align: center; font-weight: 800; font-size: 1.25rem; font-variant-numeric: tabular-nums; }
.demo-pdf__sizes span { position: absolute; inset: 0; }
.demo-pdf__after { color: #15803d; opacity: 0; }
.demo-pdf__bar { width: 100%; height: 8px; border-radius: 999px; background: var(--c-border); overflow: hidden; }
.demo-pdf__bar span { display: block; height: 100%; width: 100%; background: linear-gradient(90deg, #3b82f6, #14b8a6); transform-origin: left; transform: scaleX(0); }
.is-active .demo-pdf__bar span { animation: demo-grow 6s ease-in-out both; }
.is-active .demo-pdf__before { animation: demo-fade-out 6s ease-in-out both; }
.is-active .demo-pdf__after { animation: demo-fade-in 6s ease-in-out both; }

/* Escena 3: transcribir (las barras de la onda se mueven y aparece el texto) */
.demo-voice { display: grid; gap: var(--space-3); justify-items: center; padding-inline: var(--space-4); }
.demo-voice__wave { display: flex; align-items: center; gap: 4px; height: 4rem; }
.demo-voice__wave span { width: 6px; height: 30%; border-radius: 3px; background: #7c3aed; }
.demo-voice__wave span:nth-child(3n) { height: 70%; }
.demo-voice__wave span:nth-child(4n + 1) { height: 50%; }
.demo-voice__wave span:nth-child(5n + 2) { height: 90%; }
.demo-voice__text { margin: 0; font-size: var(--fs-sm); font-weight: 600; text-align: center; clip-path: inset(0 100% 0 0); }
.is-active .demo-voice__wave span { animation: demo-wave 0.9s ease-in-out infinite alternate; }
.is-active .demo-voice__wave span:nth-child(2n) { animation-delay: -0.3s; }
.is-active .demo-voice__wave span:nth-child(3n) { animation-delay: -0.6s; }
.is-active .demo-voice__text { animation: demo-type 6s steps(28, end) both; }

/* Escena 4: HEIC a JPG (el archivo cambia de extensión) */
.demo-heic { display: flex; align-items: center; gap: var(--space-3); flex-wrap: wrap; justify-content: center; padding: var(--space-3); }
.demo-heic__file { padding: 0.5rem 0.75rem; border-radius: var(--radius-sm); background: var(--c-surface); border: 1px solid var(--c-border-strong); font-family: var(--font-mono); font-size: var(--fs-sm); }
.demo-heic__file b { color: #b45309; }
.demo-heic__file--to b { color: #15803d; }
.demo-heic__arrow { width: 22px; height: 22px; color: var(--c-text-muted); }
.is-active .demo-heic__file--from { animation: demo-fade-half 6s ease-in-out both; }
.is-active .demo-heic__file--to { animation: demo-slide-in 6s ease-in-out both; }

@keyframes demo-fade-out { 0%, 30% { opacity: 1; } 55%, 100% { opacity: 0; } }
@keyframes demo-fade-in { 0%, 30% { opacity: 0; } 55%, 100% { opacity: 1; } }
@keyframes demo-fade-half { 0%, 35% { opacity: 1; } 60%, 100% { opacity: 0.45; } }
@keyframes demo-pop { 0%, 40% { transform: scale(1); } 55% { transform: scale(1.06); } 70%, 100% { transform: scale(1); } }
@keyframes demo-grow { 0%, 15% { transform: scaleX(0); } 60%, 100% { transform: scaleX(1); } }
@keyframes demo-wave { from { transform: scaleY(0.4); } to { transform: scaleY(1); } }
@keyframes demo-type { 0%, 25% { clip-path: inset(0 100% 0 0); } 80%, 100% { clip-path: inset(0 0 0 0); } }
@keyframes demo-slide-in { 0%, 30% { opacity: 0; transform: translateX(-12px); } 55%, 100% { opacity: 1; transform: none; } }
.hero-demo.is-paused .is-active * { animation-play-state: paused; }

/* Con «reducir movimiento», la demostración sigue animada pero solo con fundidos: nada se mueve,
   crece ni se escribe letra a letra; cada cambio aparece o desaparece suavemente. */
@media (prefers-reduced-motion: reduce) {
  .is-active .demo-cutout__subject { animation: none; }
  .demo-pdf__bar span { transform: none; }
  .is-active .demo-pdf__bar span { animation: demo-fade-in 6s ease-in-out both; }
  .is-active .demo-voice__wave span { animation: demo-pulse 1.4s ease-in-out infinite alternate; }
  .demo-voice__text { clip-path: none; }
  .is-active .demo-voice__text { animation: demo-fade-in 6s ease-in-out both; }
  .is-active .demo-heic__file--to { animation: demo-fade-in 6s ease-in-out both; }
}
@keyframes demo-pulse { from { opacity: 0.35; } to { opacity: 1; } }

/* 20. Herramientas de la sexta tanda */
.tool-divider { display: flex; align-items: center; gap: var(--space-3); margin: var(--space-4) 0; color: var(--c-text-muted); font-size: var(--fs-sm); }
.tool-divider::before, .tool-divider::after { content: ""; flex: 1; height: 1px; background: var(--c-border); }
.qr-camera { position: relative; margin-top: var(--space-3); border-radius: var(--radius); overflow: hidden; background: #000; max-width: 32rem; }
.qr-camera[hidden] { display: none; }
.qr-camera video { display: block; width: 100%; height: auto; }
.qr-camera__frame { position: absolute; inset: 18%; border: 3px solid rgb(255 255 255 / 0.85); border-radius: var(--radius); box-shadow: 0 0 0 999px rgb(0 0 0 / 0.25); }
.qr-camera__stop { position: absolute; bottom: var(--space-3); left: 50%; transform: translateX(-50%); }
.stats--wide { grid-template-columns: 1fr; }
.qr-value { overflow-wrap: anywhere; white-space: pre-wrap; }
.result__title--bad { color: var(--c-danger-text); }
.result__title--warn { color: var(--c-warn-text); }
.signal-list { list-style: none; margin: 0 0 var(--space-4); padding: 0; display: grid; gap: var(--space-2); }
.signal { display: flex; gap: var(--space-2); align-items: flex-start; padding: var(--space-3); border-radius: var(--radius); border: 1px solid; }
.signal .icon { flex: none; margin-top: 0.15em; }
.signal--ok { background: var(--c-success-bg); border-color: var(--c-success-border); color: var(--c-success-text); }
.signal--warn { background: var(--c-warn-bg); border-color: var(--c-warn-border); color: var(--c-warn-text); }
.signal--bad { background: var(--c-danger-bg); border-color: var(--c-danger-border); color: var(--c-danger-text); }
.hop-list { margin: 0; padding-left: 1.4rem; display: grid; gap: var(--space-2); }
.hop__main { margin: 0; font-family: var(--font-mono); font-size: var(--fs-sm); overflow-wrap: anywhere; }
.hop__meta { margin: 0; font-size: var(--fs-sm); color: var(--c-text-muted); }
.regex-input__row { display: flex; align-items: center; gap: var(--space-1); }
.regex-input__row .input { flex: 1; min-width: 0; }
.regex-input__row .regex-input__flags { flex: 0 0 5.5rem; }
.regex-input__slash { font-family: var(--font-mono); font-size: 1.4rem; color: var(--c-text-muted); }
.regex-out { margin-top: var(--space-4); }
.regex-out__title { font-size: var(--fs-h3); }
.regex-highlight { margin: 0 0 var(--space-4); padding: var(--space-3); border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface-2); white-space: pre-wrap; overflow-wrap: anywhere; font-family: var(--font-mono); font-size: var(--fs-sm); max-height: 22rem; overflow: auto; }
.regex-mark { background: #fde68a; color: #1f2937; border-radius: 3px; padding: 0 1px; }
.regex-mark--alt { background: #bfdbfe; }
.regex-table td { vertical-align: top; overflow-wrap: anywhere; }
.regex-explain { padding-left: 1.4rem; display: grid; gap: var(--space-1); }
.regex-explain__item code { font-weight: 700; }
.regex-explain__item[data-depth="1"] { margin-left: 1rem; }
.regex-explain__item[data-depth="2"] { margin-left: 2rem; }
.regex-explain__item[data-depth="3"], .regex-explain__item[data-depth="4"] { margin-left: 3rem; }
.unix-now { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); margin-bottom: var(--space-4); color: var(--c-text-muted); }
.stat__note { display: block; font-weight: 400; margin: var(--space-1) 0 0; font-size: 0.8rem; color: var(--c-text-muted); }
.palette { list-style: none; margin: var(--space-3) 0; padding: 0; display: grid; gap: var(--space-2); }
.palette__item { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); }
.palette__chip { display: inline-grid; place-items: center; min-width: 5.5rem; height: 2.5rem; border-radius: var(--radius-sm); border: 1px solid var(--c-border); background: var(--swatch); color: var(--swatch-text); font-weight: 700; font-size: var(--fs-sm); }
.recorder { display: grid; justify-items: center; gap: var(--space-3); padding: var(--space-5) var(--space-3); text-align: center; }
.recorder__time { font-size: clamp(2.5rem, 2rem + 2vw, 3.5rem); font-weight: 750; margin: 0; font-variant-numeric: tabular-nums; }
.recorder .level-meter { width: min(100%, 24rem); height: 12px; border-radius: 999px; background: var(--c-surface-2); border: 1px solid var(--c-border); overflow: hidden; }
.recorder .level-meter span { display: block; height: 100%; width: 100%; background: linear-gradient(90deg, #16a34a, #eab308 70%, #dc2626); transform-origin: left; transform: scaleX(var(--level, 0)); transition: transform 80ms linear; }
.recorder__actions { justify-content: center; }
.btn--lg { min-height: 52px; padding-inline: 1.4rem; font-size: var(--fs-lg); }
.pdf-form { display: grid; gap: var(--space-2) var(--space-4); margin-block: var(--space-4); }
@media (min-width: 720px) { .pdf-form { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.pdf-form .field { margin: 0; }
.pdf-form__check small { color: var(--c-text-muted); }
.image-grid { list-style: none; margin: var(--space-4) 0 0; padding: 0; display: grid; gap: var(--space-3); grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr)); }
.image-grid__item { display: grid; gap: var(--space-2); align-content: start; padding: var(--space-2); border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface-2); }
.image-grid__item img, .image-grid__placeholder { width: 100%; height: 8rem; object-fit: contain; background: var(--c-surface); border-radius: var(--radius-sm); }
.image-grid__placeholder { display: grid; place-items: center; color: var(--c-text-muted); font-size: var(--fs-sm); }
.image-grid__meta { margin: 0; font-size: 0.8rem; color: var(--c-text-muted); }
.compare-slot__title { font-size: var(--fs-lg); margin: 0 0 var(--space-2); }
.compare-slot__file { margin: var(--space-2) 0 0; font-size: var(--fs-sm); color: var(--c-text-muted); overflow-wrap: anywhere; }

/* Página «Instalar como aplicación» */
.install-quick { display: grid; justify-items: start; gap: var(--space-2); padding: var(--space-4); margin-block: var(--space-4); border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface); }
.install-quick p { margin: 0; }
.install-device { padding: var(--space-1) var(--space-4); margin-block: var(--space-4); border: 1px solid transparent; border-radius: var(--radius); }
.install-device.is-current { border-color: var(--c-accent); background: var(--c-surface); }
.install-device__mine { display: inline-block; margin: 0 0 var(--space-2); padding: 0.1rem 0.6rem; border-radius: 999px; font-size: var(--fs-sm); font-weight: 700; color: var(--c-surface); background: var(--c-accent); }

/* 21. Herramientas de la séptima tanda */
@media (min-width: 720px) { .tool-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); align-items: start; } }
.quality-badge { display: inline-block; padding: 0.05rem 0.5rem; border: 1px solid; border-radius: 999px; font-size: var(--fs-sm); font-weight: 700; }
.quality-badge--good { background: var(--c-success-bg); border-color: var(--c-success-border); color: var(--c-success-text); }
.quality-badge--warn { background: var(--c-warn-bg); border-color: var(--c-warn-border); color: var(--c-warn-text); }
.quality-badge--bad { background: var(--c-danger-bg); border-color: var(--c-danger-border); color: var(--c-danger-text); }
.panel-title + .tool-grid { margin-top: var(--space-3); }
.result + .panel-title { margin-top: var(--space-6); }
.check-list { display: grid; gap: var(--space-2); }
/* Escribir sobre un PDF */
.write-stage canvas { cursor: crosshair; }
.write-item { position: absolute; cursor: move; touch-action: none; line-height: 0; outline: 1px dashed rgb(10 106 112 / 0.6); outline-offset: 1px; }
.write-item:focus-visible { outline: 3px solid var(--c-focus); }
.write-item--text { line-height: 1.2; white-space: pre; font-family: Helvetica, Arial, "Liberation Sans", sans-serif; }
.write-item img { display: block; width: 100%; height: 100%; pointer-events: none; }
.write-item svg { display: block; pointer-events: none; }
/* Cambio de tema: el icono nuevo entra girando, igual de claro a oscuro que de oscuro a claro. */
.theme-toggle.is-switching .icon { animation: theme-icon-in 380ms cubic-bezier(0.2, 0.8, 0.2, 1); }
@keyframes theme-icon-in { from { opacity: 0; transform: rotate(-90deg) scale(0.5); } to { opacity: 1; transform: none; } }

/* 22. Ilustraciones de guías y rutas (SVG generado al compilar; colores del tema) */
.fig-figure { margin: var(--space-6) 0; }
.fig-figure .fig { display: block; width: 100%; height: auto; font-family: inherit; }
/* En pantallas estrechas, la ilustración conserva un tamaño legible y se desplaza en horizontal. */
.fig-scroll {
  overflow-x: auto; border-radius: 18px; padding: 5px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--c-section, var(--c-accent)) 35%, transparent), transparent 45%, color-mix(in srgb, var(--c-accent) 25%, transparent));
  box-shadow: 0 12px 32px -18px color-mix(in srgb, var(--c-accent) 55%, transparent), var(--shadow-sm);
  transition: box-shadow 0.3s ease, translate 0.3s var(--ease-out, ease);
}
.fig-scroll:hover { box-shadow: 0 18px 40px -18px color-mix(in srgb, var(--c-accent) 70%, transparent), var(--shadow); translate: 0 calc(var(--lift, -4px) / 2); }
.fig-scroll:focus-visible { outline: 3px solid var(--c-focus); outline-offset: 2px; }
.fig-figure .fig--narrow { max-width: 348px; margin-inline: auto; }
@media (max-width: 599px) { .fig-figure .fig:not(.fig--narrow) { min-width: 520px; } }
.fig-figure figcaption {
  display: flex; gap: var(--space-2); align-items: baseline; justify-content: center;
  margin-top: var(--space-3); font-size: var(--fs-sm); color: var(--c-text-muted); text-align: center;
}
.fig-figure figcaption::before {
  content: ""; flex: none; width: 0.55em; height: 0.55em; border-radius: 50%;
  background: linear-gradient(135deg, var(--c-section, var(--c-accent)), var(--c-accent));
}
/* Fondo: degradado y dos luces difusas que respiran (sin trama: el contenido se lee mejor). */
.fig-bg-a { stop-color: var(--c-surface); }
.fig-bg-b { stop-color: color-mix(in srgb, var(--c-accent-soft) 55%, var(--c-surface-2)); }
.fig-glow-a { stop-color: var(--c-section, var(--c-accent)); stop-opacity: 0.22; }
.fig-glow-b { stop-color: var(--c-section, var(--c-accent)); stop-opacity: 0; }
.fig-glow { animation: fig-breathe 6s ease-in-out infinite alternate; }
.fig-glow--2 { animation-delay: -3s; }
@keyframes fig-breathe { from { opacity: 0.55; } to { opacity: 1; } }
.fig-frame { fill: none; stroke: var(--c-border); }
/* Degradados de acento, tarjetas, barra de ventana y teclas. */
.fig-ac-a { stop-color: var(--c-accent); }
.fig-ac-b { stop-color: var(--c-accent-hover); }
.fig-cardg-a { stop-color: var(--c-surface); }
.fig-cardg-b { stop-color: color-mix(in srgb, var(--c-surface-2) 55%, var(--c-surface)); }
.fig-barg-a { stop-color: var(--c-surface); }
.fig-barg-b { stop-color: var(--c-surface-2); }
.fig-keyg-a { stop-color: var(--c-surface); }
.fig-keyg-b { stop-color: var(--c-surface-2); }
/* Etiqueta del tipo de ilustración. */
.fig-badge { fill: var(--c-accent-soft); stroke: color-mix(in srgb, var(--c-accent) 35%, transparent); }
.fig-badge-icon { fill: none; stroke: var(--c-accent); stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.fig-badge-text { fill: var(--c-accent); font-weight: 750; letter-spacing: 0.06em; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .fig-badge-text { fill: var(--c-text); } }
:root[data-theme="dark"] .fig-badge-text { fill: var(--c-text); }
.fig-card, .fig-row { stroke: var(--c-border); filter: drop-shadow(0 2px 3px rgb(16 24 40 / 0.07)) drop-shadow(0 6px 12px rgb(16 24 40 / 0.05)); }
.fig-row { fill: var(--c-surface); }
.fig-card--hl, .fig-row--hl { stroke: var(--c-accent); stroke-width: 2; }
.fig-row--hl { fill: var(--c-accent-soft); }
.fig-halo { fill: none; stroke: var(--c-accent); stroke-width: 6; opacity: 0.18; animation: fig-halo 2.4s ease-in-out infinite alternate; }
@keyframes fig-halo { from { opacity: 0.08; } to { opacity: 0.32; } }
.fig-ring { fill: none; stroke: color-mix(in srgb, var(--c-accent) 25%, transparent); stroke-width: 3; }
.fig-icon-bg { fill: var(--c-accent-soft); }
.fig-icon-bg--hl { stroke: var(--c-accent); stroke-width: 1.5; }
.fig-window { fill: var(--c-bg); stroke: var(--c-border-strong); filter: drop-shadow(0 10px 18px rgb(16 24 40 / 0.12)); }
.fig-notch { fill: var(--c-text); opacity: 0.85; }
.fig-sep { fill: none; stroke: var(--c-border); }
.fig-shine { fill: none; stroke: rgb(255 255 255 / 0.45); stroke-width: 1.5; stroke-linecap: round; }
.fig-title, .fig-text { fill: var(--c-text); }
.fig-title { font-weight: 750; }
.fig-strong { font-weight: 700; }
.fig-muted { fill: var(--c-text-muted); }
.fig-muted-fill { fill: var(--c-border-strong); }
.fig-accent { fill: var(--c-accent); }
.fig-on-accent { fill: var(--c-on-accent); }
.fig-icon { fill: none; stroke: var(--c-accent); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.fig-arrow { fill: none; stroke: var(--c-text-muted); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.fig-arrow--soft { stroke: color-mix(in srgb, var(--c-text-muted) 60%, transparent); stroke-dasharray: 3 4; }
/* Trazo que recorre las flechas: con «reducir movimiento» se queda quieto. */
.fig-flowline { fill: none; stroke: var(--c-accent); stroke-width: 2; stroke-linecap: round; stroke-dasharray: 3 9; animation: fig-flow 1.2s linear infinite; }
@keyframes fig-flow { to { stroke-dashoffset: -12; } }
.fig-dot { fill: var(--c-accent); opacity: 0.7; }
.fig-ok-bg { fill: var(--c-success-bg); stroke: var(--c-success-border); }
.fig-ok-mark { fill: none; stroke: var(--c-success-text); stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.fig-bad-bg { fill: var(--c-danger-bg); stroke: var(--c-danger-border); }
.fig-bad-mark { fill: none; stroke: var(--c-danger-text); stroke-width: 2.4; stroke-linecap: round; }
.fig-check { stroke: var(--c-border); fill: var(--c-surface); }
.fig-check--ok { fill: color-mix(in srgb, var(--c-success-bg) 55%, var(--c-surface)); }
.fig-check--bad { fill: color-mix(in srgb, var(--c-danger-bg) 55%, var(--c-surface)); }
.fig-check-bar--ok { fill: var(--c-success-border); }
.fig-check-bar--bad { fill: var(--c-danger-border); }
.fig-check-bar--neutral { fill: var(--c-accent); opacity: 0.6; }
.fig-track { fill: color-mix(in srgb, var(--c-border) 55%, transparent); }
.fig-bar { fill: color-mix(in srgb, var(--c-text-muted) 55%, var(--c-surface)); }
.fig-toggle-off { fill: var(--c-border-strong); }
.fig-knob { fill: #fff; filter: drop-shadow(0 1px 1.5px rgb(0 0 0 / 0.3)); }
.fig-pointer { fill: var(--c-text); stroke: var(--c-surface); stroke-width: 1.5; stroke-linejoin: round; }
.fig-ripple { fill: var(--c-accent); opacity: 0; transform-box: fill-box; transform-origin: center; animation: fig-ripple 2.2s ease-out infinite; }
@keyframes fig-ripple { 0% { opacity: 0.45; scale: calc(1 - 0.5 * var(--fig-m, 1)); } 70%, 100% { opacity: 0; scale: calc(1 + 0.5 * var(--fig-m, 1)); } }
.fig-key { fill: var(--c-border-strong); }
.fig-key-top { stroke: var(--c-border); }
.fig-plus { fill: var(--c-surface); stroke: var(--c-border); }
.fig-layer { stroke: var(--c-border); }
.fig-layer-edge { fill: var(--c-border-strong); opacity: 0.6; }
.fig-layer--0 { fill: var(--c-surface); }
.fig-layer--1 { fill: color-mix(in srgb, var(--c-accent-soft) 70%, var(--c-surface)); }
.fig-layer--2 { fill: var(--c-surface-2); }
.fig-layer--hl { fill: var(--c-accent-soft); stroke: var(--c-accent); stroke-width: 2; }
.fig-layer-tab { opacity: 0.45; }
.fig-layer-tab--hl { opacity: 1; }
.fig-term { fill: #0f172a; stroke: #334155; filter: drop-shadow(0 10px 18px rgb(2 6 23 / 0.28)); }
.fig-term-bar { fill: #1e293b; }
.fig-term-text { fill: #e2e8f0; }
.fig-term-muted { fill: #94a3b8; }
.fig-term-prompt { fill: #5ccac5; }
/* Cursor que parpadea unas veces (no indefinidamente) y se queda visible. */
.fig-cursor { fill: #5ccac5; animation: fig-blink 1s steps(1) 5; }
@keyframes fig-blink { 50% { opacity: 0; } }
/* Aparición escalonada al llegar a la ilustración: cada grupo tiene su turno. */
@supports (animation-timeline: view()) {
  :root:not([data-tool-slug]) .fig-figure { view-timeline: --fig block; }
  :root:not([data-tool-slug]) .fig-item { animation: fig-in linear both; animation-timeline: --fig; transform-box: fill-box; transform-origin: center; }
  /* Rangos cortos y en píxeles: cada grupo está del todo visible poco después de asomar, también en
     las ilustraciones altas (con porcentajes se quedaban a media opacidad mientras se leían). */
  .fig-d0 { animation-range: entry 0px entry 140px; }
  .fig-d1 { animation-range: entry 20px entry 160px; }
  .fig-d2 { animation-range: entry 40px entry 180px; }
  .fig-d3 { animation-range: entry 60px entry 200px; }
  .fig-d4 { animation-range: entry 80px entry 220px; }
  .fig-d5 { animation-range: entry 100px entry 240px; }
  .fig-d6 { animation-range: entry 120px entry 260px; }
  .fig-d7 { animation-range: entry 140px entry 280px; }
  .fig-d8, .fig-d9, .fig-d10, .fig-d11, .fig-d12 { animation-range: entry 160px entry 300px; }
  :root:not([data-tool-slug]) .fig-grow { animation: fig-grow linear both; animation-timeline: --fig; animation-range: entry 80px entry 320px; transform-box: fill-box; transform-origin: left center; }
}
@keyframes fig-in { from { opacity: 0; translate: 0 calc(var(--rise, 22px) * 0.6); scale: calc(1 - 0.06 * var(--fig-m, 1)); } }
@keyframes fig-grow { from { scale: calc(1 - var(--fig-m, 1)) 1; opacity: 0.3; } }
@media (prefers-reduced-motion: reduce) {
  :root { --fig-m: 0; }
  .fig-flowline { animation: none; }
}

/* 23. Categorías de herramientas: una tarjeta y un color por categoría */
[data-cat="imagenes"] { --cat: #be185d; --cat-soft: #fce7f3; }
[data-cat="pdf"] { --cat: #b91c1c; --cat-soft: #fee2e2; }
[data-cat="texto"] { --cat: #6d28d9; --cat-soft: #ede9fe; }
[data-cat="calculadoras"] { --cat: #1d4ed8; --cat-soft: #dbeafe; }
[data-cat="diagnostico"] { --cat: #0e7490; --cat-soft: #cffafe; }
[data-cat="multimedia"] { --cat: #c2410c; --cat-soft: #ffedd5; }
[data-cat="seguridad"] { --cat: #15803d; --cat-soft: #dcfce7; }
[data-cat="habilidad"] { --cat: #a16207; --cat-soft: #fef9c3; }
:root[data-theme="dark"] [data-cat="imagenes"] { --cat: #f472b6; --cat-soft: rgb(244 114 182 / 0.14); }
:root[data-theme="dark"] [data-cat="pdf"] { --cat: #f87171; --cat-soft: rgb(248 113 113 / 0.14); }
:root[data-theme="dark"] [data-cat="texto"] { --cat: #a78bfa; --cat-soft: rgb(167 139 250 / 0.14); }
:root[data-theme="dark"] [data-cat="calculadoras"] { --cat: #60a5fa; --cat-soft: rgb(96 165 250 / 0.14); }
:root[data-theme="dark"] [data-cat="diagnostico"] { --cat: #22d3ee; --cat-soft: rgb(34 211 238 / 0.14); }
:root[data-theme="dark"] [data-cat="multimedia"] { --cat: #fb923c; --cat-soft: rgb(251 146 60 / 0.14); }
:root[data-theme="dark"] [data-cat="seguridad"] { --cat: #4ade80; --cat-soft: rgb(74 222 128 / 0.14); }
:root[data-theme="dark"] [data-cat="habilidad"] { --cat: #facc15; --cat-soft: rgb(250 204 21 / 0.14); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) [data-cat="imagenes"] { --cat: #f472b6; --cat-soft: rgb(244 114 182 / 0.14); }
  :root:not([data-theme="light"]) [data-cat="pdf"] { --cat: #f87171; --cat-soft: rgb(248 113 113 / 0.14); }
  :root:not([data-theme="light"]) [data-cat="texto"] { --cat: #a78bfa; --cat-soft: rgb(167 139 250 / 0.14); }
  :root:not([data-theme="light"]) [data-cat="calculadoras"] { --cat: #60a5fa; --cat-soft: rgb(96 165 250 / 0.14); }
  :root:not([data-theme="light"]) [data-cat="diagnostico"] { --cat: #22d3ee; --cat-soft: rgb(34 211 238 / 0.14); }
  :root:not([data-theme="light"]) [data-cat="multimedia"] { --cat: #fb923c; --cat-soft: rgb(251 146 60 / 0.14); }
  :root:not([data-theme="light"]) [data-cat="seguridad"] { --cat: #4ade80; --cat-soft: rgb(74 222 128 / 0.14); }
  :root:not([data-theme="light"]) [data-cat="habilidad"] { --cat: #facc15; --cat-soft: rgb(250 204 21 / 0.14); }
}
.tool-cats { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-4); }
@media (min-width: 640px) { .tool-cats { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1000px) { .tool-cats { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
.tool-cat {
  position: relative; display: flex; flex-direction: column; gap: var(--space-2); padding: var(--space-5);
  background: var(--c-surface); border: 1px solid var(--c-border); border-top: 4px solid var(--cat);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); transition: box-shadow var(--transition), transform var(--transition);
}
.tool-cat:hover, .tool-cat:focus-within { box-shadow: var(--shadow); transform: translateY(-2px); }
.tool-cat:target { outline: 3px solid var(--cat); outline-offset: 3px; }
.tool-cat__icon { display: inline-grid; place-items: center; width: 56px; height: 56px; border-radius: var(--radius-lg); background: var(--cat-soft); color: var(--cat); }
.tool-cat__icon .icon { width: 28px; height: 28px; }
.tool-cat__title { margin: var(--space-1) 0 0; font-size: 1.375rem; }
.tool-cat__title a { color: var(--c-text); text-decoration: none; }
.tool-cat__title a:hover { color: var(--cat); }
.tool-cat__count { margin: 0; font-size: var(--fs-sm); font-weight: 700; color: var(--cat); }
.tool-cat__text { margin: 0; color: var(--c-text-muted); }
.tool-cat__examples { margin: auto 0 0; padding: var(--space-2) 0 0; list-style: none; display: flex; flex-wrap: wrap; gap: var(--space-1); }
.tool-cat__examples li { padding: 0.15rem 0.6rem; border-radius: 999px; background: var(--cat-soft); font-size: var(--fs-sm); }
.tool-cats__more { margin-top: var(--space-5); text-align: center; }
.tool-cat-hero { display: flex; gap: var(--space-4); align-items: flex-start; }
.tool-cat-hero .tool-cat__icon { flex: none; width: 64px; height: 64px; }
[data-cat] .card-grid--tools .card__icon { background: var(--cat-soft); color: var(--cat); }
.tool-cat-nav { margin-top: var(--space-7); }
.tool-cat-nav ul { list-style: none; margin: var(--space-3) 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--space-2); }
.tool-cat-nav a { display: inline-flex; align-items: center; gap: var(--space-2); padding: var(--space-2) var(--space-3); border: 1px solid var(--c-border); border-left: 4px solid var(--cat); border-radius: var(--radius); color: var(--c-text); text-decoration: none; font-weight: 600; background: var(--c-surface); }
.tool-cat-nav a:hover { border-color: var(--cat); }
.tool-cat-nav .icon { color: var(--cat); }
@media (prefers-reduced-motion: reduce) { .tool-cat:hover, .tool-cat:focus-within { transform: none; } }

/* 24. Habilidad y reflejos: mecanografía, puntería, memoria y lectura */
.typing-box { display: grid; gap: var(--space-3); }
.typing-words {
  margin: 0; height: calc(3 * 2.2em + 2 * var(--space-3)); overflow: hidden; padding: var(--space-3) var(--space-4);
  font-family: var(--font-mono); font-size: clamp(1.15rem, 1rem + 0.6vw, 1.5rem);
  line-height: 2.2; color: var(--c-text-muted); background: var(--c-surface-2); border: 1px solid var(--c-border);
  border-radius: var(--radius); cursor: text; user-select: none; -webkit-user-select: none; scroll-behavior: auto;
}
.tw { border-radius: 4px; padding: 0.05em 0.1em; }
.tw.is-current { color: var(--c-text); background: var(--c-accent-soft); }
.tw.is-ok { color: var(--c-success-text); }
.tw.is-bad { color: var(--c-danger-text); text-decoration: underline wavy; text-underline-offset: 0.2em; }
.tl--ok { color: var(--c-success-text); }
.tl--bad { color: var(--c-danger-text); background: var(--c-danger-bg); border-radius: 2px; }
.tl--extra { color: var(--c-danger-text); text-decoration: line-through; }
.typing-input {
  width: 100%; min-height: 52px; padding: var(--space-2) var(--space-4); font-size: var(--fs-lg);
  font-family: var(--font-mono);
  border: 1px solid var(--c-border-strong); border-radius: var(--radius); background: var(--c-surface); color: var(--c-text);
}
.typing-input:focus-visible { outline: 3px solid var(--c-focus); outline-offset: 0; border-color: var(--c-accent); }
.typing-next { margin: var(--space-3) 0 var(--space-2); font-weight: 600; min-height: 1.5em; }
.kb { --kb-gap: clamp(3px, 1vw, 6px); display: grid; gap: var(--kb-gap); justify-content: center; user-select: none; -webkit-user-select: none; }
.kb-row { display: flex; gap: var(--kb-gap); justify-content: center; }
.kb-row:nth-child(2) { margin-left: clamp(0.6rem, 2.5vw, 1.2rem); }
.kb-row:nth-child(3) { margin-left: clamp(1.4rem, 6vw, 2.6rem); }
.kb-key {
  display: grid; place-items: center; width: clamp(1.3rem, 6vw, 2.6rem); height: clamp(1.9rem, 8vw, 2.6rem);
  border: 1px solid var(--c-border); border-bottom-width: 3px; border-radius: 6px; background: var(--c-surface);
  color: var(--c-text-muted); font-weight: 700; font-size: var(--fs-sm); opacity: 0.45;
}
.kb-key.is-active { opacity: 1; color: var(--c-text); }
.kb-key--home { text-decoration: underline; text-underline-offset: 0.25em; }
.kb-key--space { width: min(18rem, 60vw); }
.kb-key.is-next { background: var(--c-accent); border-color: var(--c-accent); color: var(--c-on-accent); opacity: 1; }
.kb.is-wrong .kb-key.is-next { background: var(--c-danger-border); border-color: var(--c-danger-border); }
.aim-area {
  position: relative; display: grid; place-items: center; height: clamp(18rem, 55vh, 28rem); overflow: hidden;
  border: 2px dashed var(--c-border-strong); border-radius: var(--radius-lg); background: var(--c-surface-2);
  touch-action: manipulation; user-select: none; -webkit-user-select: none; -webkit-tap-highlight-color: transparent;
}
.aim-area.is-running { border-style: solid; border-color: var(--c-accent); cursor: crosshair; }
.aim-start[hidden] { display: none; }
.aim-target {
  position: absolute; padding: 0; border: 0; border-radius: 50%; cursor: crosshair;
  background: radial-gradient(circle, #fff 0 18%, #d1242f 19% 42%, #fff 43% 62%, #d1242f 63%);
  box-shadow: 0 0 0 2px #7f1d1d;
}
.aim-target:focus-visible { outline: 3px solid var(--c-focus); outline-offset: 3px; }
.aim-target[hidden] { display: none; }
.memory-phase { min-height: 1.5em; margin: 0 0 var(--space-3); font-weight: 600; text-align: center; }
.memory-grid + .actions { justify-content: center; }
.memory-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-3); width: min(100%, 22rem); margin: 0 auto var(--space-4); }
.memory-cell {
  aspect-ratio: 1; border: 2px solid var(--c-border-strong); border-radius: var(--radius); background: var(--c-surface-2);
  cursor: pointer; transition: background 120ms ease, transform 120ms ease; touch-action: manipulation;
}
.memory-cell:disabled { cursor: default; }
.memory-cell:focus-visible { outline: 3px solid var(--c-focus); outline-offset: 2px; }
.memory-cell.is-lit { background: var(--c-accent); border-color: var(--c-accent); transform: scale(0.96); }
.memory-cell.is-wrong { background: var(--c-danger-border); border-color: var(--c-danger-border); }
.reading-text { padding: var(--space-5); border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface); max-width: 42rem; margin: 0 auto var(--space-4); }
.reading-text:focus { outline: none; }
.reading-text__title { margin-top: 0; }
.reading-q { margin-bottom: var(--space-4); }
.reading-q legend { font-weight: 700; margin-bottom: var(--space-2); }
.reading-q .check { font-weight: 400; margin-top: var(--space-2); }
@media (prefers-reduced-motion: reduce) { .memory-cell { transition: none; } .memory-cell.is-lit { transform: none; } }
/* Test de mecanografía sobre texto: se escribe encima del texto, sin barra visible */
.typing-progress { display: flex; align-items: center; gap: var(--space-3); margin: 0 0 var(--space-2); font-size: var(--fs-sm); font-weight: 600; color: var(--c-text-muted); }
.typing-progress progress { flex: 1; height: 0.6rem; accent-color: var(--c-accent); }
.typing-text-box { position: relative; border: 2px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface-2); cursor: text; }
.typing-text-box.is-active { border-color: var(--c-accent); }
.typing-text {
  /* Sin relleno propio: la zona que se desplaza mide exactamente 4 líneas y nunca muestra medias líneas. */
  margin: var(--space-4) var(--space-5); height: calc(4 * 1.9em); overflow: hidden; padding: 0;
  font-family: var(--font-mono); font-size: clamp(1.05rem, 0.95rem + 0.5vw, 1.35rem); line-height: 1.9;
  color: var(--c-text-muted); white-space: pre-wrap; overflow-wrap: break-word; user-select: none; -webkit-user-select: none;
}
.tc.is-ok { color: var(--c-success-text); }
.tc.is-bad { color: var(--c-danger-text); background: var(--c-danger-bg); border-radius: 2px; }
.tc.is-caret { color: var(--c-text); box-shadow: inset 0 -3px 0 var(--c-accent); }
.typing-text-box.is-active .tc.is-caret { animation: typing-caret 1s steps(1) infinite; }
@keyframes typing-caret { 50% { box-shadow: inset 0 -3px 0 transparent; } }
.typing-overlay {
  position: absolute; inset: 0; display: grid; place-items: center; margin: 0; padding: var(--space-4); text-align: center;
  font-weight: 700; font-size: var(--fs-lg); color: var(--c-text); background: color-mix(in srgb, var(--c-surface) 82%, transparent);
  border-radius: var(--radius); pointer-events: none;
}
.typing-overlay[hidden] { display: none; }
/* El campo que recibe las pulsaciones no se ve, pero puede tener el foco (y abre el teclado del móvil). */
.typing-capture { position: absolute; left: 0; top: 0; width: 1px; height: 1px; padding: 0; border: 0; opacity: 0; font-size: 16px; caret-color: transparent; }
.typing-actions { justify-content: center; margin-top: var(--space-4); }
.typing-actions [hidden] { display: none; }
@media (prefers-reduced-motion: reduce) { .typing-text-box.is-active .tc.is-caret { animation: none; } }

/* 25. Recursos: diccionario, códigos de error, comandos y atajos */
.list-filter { max-width: 34rem; margin-bottom: var(--space-5); display: grid; gap: var(--space-2); }
.list-filter .field__hint:empty { display: none; }
.res-group { margin-block: var(--space-6); }
.res-group__title { font-size: var(--fs-h3); margin: 0 0 var(--space-3); padding-bottom: var(--space-2); border-bottom: 2px solid var(--c-accent-soft); }
.res-group__intro { margin: 0 0 var(--space-3); color: var(--c-text-muted); max-width: 70ch; }
.res-list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-2); }
@media (min-width: 800px) { .res-list { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.res-item { padding: var(--space-3) var(--space-4); border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface); }
.res-item__title { font-weight: 700; overflow-wrap: anywhere; }
.res-item__title code { font-weight: 700; }
.res-item__text { margin: var(--space-1) 0 0; font-size: var(--fs-sm); color: var(--c-text-muted); }
.res-item__meta { margin: var(--space-1) 0 0; font-size: var(--fs-sm); }
.err-code { display: block; font-family: var(--font-mono); font-size: 0.55em; color: var(--c-accent); letter-spacing: 0.02em; }
.article__header h1 code { font-size: 0.85em; overflow-wrap: anywhere; }
.cmd-facts { display: grid; gap: var(--space-2); margin: 0 0 var(--space-5); padding: var(--space-4); border: 1px solid var(--c-border); border-radius: var(--radius); background: var(--c-surface-2); }
.cmd-facts div { display: grid; gap: var(--space-1); }
@media (min-width: 640px) { .cmd-facts div { grid-template-columns: 11rem minmax(0, 1fr); } }
.cmd-facts dt { font-weight: 700; }
.cmd-facts dd { margin: 0; }
.cmd-risk--alto { color: var(--c-danger-text); font-weight: 650; }
.cmd-example { margin-block: var(--space-4); }
.cmd-example p { margin-top: var(--space-2); }
.cmd-example__code { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); padding: var(--space-3); border-radius: var(--radius); background: var(--c-surface-2); border: 1px solid var(--c-border); }
.cmd-example__code code { flex: 1 1 14rem; overflow-wrap: anywhere; font-size: 0.95rem; }
.shortcuts-tools { display: flex; flex-wrap: wrap; align-items: end; gap: var(--space-3); justify-content: space-between; }
.shortcuts-tools .list-filter { flex: 1 1 18rem; margin-bottom: 0; }
.shortcuts-tools .btn { margin-bottom: var(--space-5); }
.shortcuts { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); }
.shortcuts th, .shortcuts td { text-align: left; padding: var(--space-2) var(--space-3); border-bottom: 1px solid var(--c-border); vertical-align: top; overflow-wrap: anywhere; }
.shortcuts th { font-size: var(--fs-sm); color: var(--c-text-muted); }
.shortcuts__keys { width: 40%; }
@media (max-width: 479.98px) { .shortcuts th, .shortcuts td { padding: var(--space-2); } .shortcuts__keys { width: 45%; } }
@media print {
  .list-filter, .shortcuts-tools, .breadcrumbs, .sources { display: none !important; }
  .shortcuts-group { break-inside: avoid; margin-block: 0.6rem; }
  .shortcuts th, .shortcuts td { padding: 0.2rem 0.4rem; }
  .shortcuts-page .lead { font-size: 1rem; }
}

/* 26. Programación e Inteligencia artificial: colores, categorías de guías y páginas de sección ---- */
[data-section="programacion"] { --c-section: #84cc16; --c-accent: #4d7c0f; --c-accent-hover: #3f6212; --c-accent-soft: #ecfccb; --c-on-accent: #ffffff; --c-focus: #4d7c0f; }
[data-section="ia"] { --c-section: #d946ef; --c-accent: #a21caf; --c-accent-hover: #86198f; --c-accent-soft: #fae8ff; --c-on-accent: #ffffff; --c-focus: #a21caf; }
:root[data-theme="dark"][data-section="programacion"], :root[data-theme="dark"] [data-section="programacion"] { --c-accent: #a3e635; --c-accent-hover: #bef264; --c-accent-soft: #233016; --c-on-accent: #0b1220; --c-focus: #bef264; }
:root[data-theme="dark"][data-section="ia"], :root[data-theme="dark"] [data-section="ia"] { --c-accent: #e879f9; --c-accent-hover: #f0abfc; --c-accent-soft: #3a1840; --c-on-accent: #0b1220; --c-focus: #f0abfc; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"])[data-section="programacion"], :root:not([data-theme="light"]) [data-section="programacion"] { --c-accent: #a3e635; --c-accent-hover: #bef264; --c-accent-soft: #233016; --c-on-accent: #0b1220; --c-focus: #bef264; }
  :root:not([data-theme="light"])[data-section="ia"], :root:not([data-theme="light"]) [data-section="ia"] { --c-accent: #e879f9; --c-accent-hover: #f0abfc; --c-accent-soft: #3a1840; --c-on-accent: #0b1220; --c-focus: #f0abfc; }
}

/* Categorías de guías: mismo diseño de tarjeta que las de herramientas, con su propio color. */
[data-cat="basicos"] { --cat: #6d28d9; --cat-soft: #ede9fe; }
[data-cat="hardware"] { --cat: #1d4ed8; --cat-soft: #dbeafe; }
[data-cat="windows"] { --cat: #0e7490; --cat-soft: #cffafe; }
[data-cat="redes"] { --cat: #0f766e; --cat-soft: #ccfbf1; }
[data-cat="ciberseguridad"] { --cat: #15803d; --cat-soft: #dcfce7; }
[data-cat="movil"] { --cat: #be185d; --cat-soft: #fce7f3; }
[data-cat="documentos"] { --cat: #b91c1c; --cat-soft: #fee2e2; }
[data-cat="gaming"] { --cat: #c2410c; --cat-soft: #ffedd5; }
[data-cat="programacion"] { --cat: #4d7c0f; --cat-soft: #ecfccb; }
[data-cat="ia"] { --cat: #a21caf; --cat-soft: #fae8ff; }
:root[data-theme="dark"] [data-cat="basicos"] { --cat: #a78bfa; --cat-soft: rgb(167 139 250 / 0.14); }
:root[data-theme="dark"] [data-cat="hardware"] { --cat: #60a5fa; --cat-soft: rgb(96 165 250 / 0.14); }
:root[data-theme="dark"] [data-cat="windows"] { --cat: #22d3ee; --cat-soft: rgb(34 211 238 / 0.14); }
:root[data-theme="dark"] [data-cat="redes"] { --cat: #2dd4bf; --cat-soft: rgb(45 212 191 / 0.14); }
:root[data-theme="dark"] [data-cat="ciberseguridad"] { --cat: #4ade80; --cat-soft: rgb(74 222 128 / 0.14); }
:root[data-theme="dark"] [data-cat="movil"] { --cat: #f472b6; --cat-soft: rgb(244 114 182 / 0.14); }
:root[data-theme="dark"] [data-cat="documentos"] { --cat: #f87171; --cat-soft: rgb(248 113 113 / 0.14); }
:root[data-theme="dark"] [data-cat="gaming"] { --cat: #fb923c; --cat-soft: rgb(251 146 60 / 0.14); }
:root[data-theme="dark"] [data-cat="programacion"] { --cat: #a3e635; --cat-soft: rgb(163 230 53 / 0.14); }
:root[data-theme="dark"] [data-cat="ia"] { --cat: #e879f9; --cat-soft: rgb(232 121 249 / 0.14); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) [data-cat="basicos"] { --cat: #a78bfa; --cat-soft: rgb(167 139 250 / 0.14); }
  :root:not([data-theme="light"]) [data-cat="hardware"] { --cat: #60a5fa; --cat-soft: rgb(96 165 250 / 0.14); }
  :root:not([data-theme="light"]) [data-cat="windows"] { --cat: #22d3ee; --cat-soft: rgb(34 211 238 / 0.14); }
  :root:not([data-theme="light"]) [data-cat="redes"] { --cat: #2dd4bf; --cat-soft: rgb(45 212 191 / 0.14); }
  :root:not([data-theme="light"]) [data-cat="ciberseguridad"] { --cat: #4ade80; --cat-soft: rgb(74 222 128 / 0.14); }
  :root:not([data-theme="light"]) [data-cat="movil"] { --cat: #f472b6; --cat-soft: rgb(244 114 182 / 0.14); }
  :root:not([data-theme="light"]) [data-cat="documentos"] { --cat: #f87171; --cat-soft: rgb(248 113 113 / 0.14); }
  :root:not([data-theme="light"]) [data-cat="gaming"] { --cat: #fb923c; --cat-soft: rgb(251 146 60 / 0.14); }
  :root:not([data-theme="light"]) [data-cat="programacion"] { --cat: #a3e635; --cat-soft: rgb(163 230 53 / 0.14); }
  :root:not([data-theme="light"]) [data-cat="ia"] { --cat: #e879f9; --cat-soft: rgb(232 121 249 / 0.14); }
}
[data-cat] .card-grid--articles .article-card { border-top: 3px solid var(--cat); }

/* Página de sección (Programación, IA): cabecera, saltos a cada nivel y el camino numerado. */
.topic-hero { display: flex; gap: var(--space-5); align-items: flex-start; }
.topic-hero__icon {
  display: inline-grid; place-items: center; width: 72px; height: 72px; flex: none; border-radius: 20px;
  background: var(--c-section); color: #ffffff; box-shadow: 0 10px 30px color-mix(in srgb, var(--c-section) 35%, transparent);
}
.topic-hero__icon .icon { width: 36px; height: 36px; }
.topic-hero__stats { list-style: none; margin: var(--space-3) 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--space-2); }
.topic-hero__stats li { padding: 0.3rem 0.8rem; border-radius: 999px; background: var(--c-accent-soft); font-size: var(--fs-sm); }
.topic-hero__stats strong { color: var(--c-accent-hover); font-size: 1rem; }
@media (max-width: 559.98px) { .topic-hero { flex-direction: column; gap: var(--space-3); } }
.topic-levels-nav ol { list-style: none; margin: 0 0 var(--space-6); padding: 0; display: flex; flex-wrap: wrap; gap: var(--space-2); }
.topic-levels-nav a {
  display: inline-flex; align-items: center; gap: var(--space-2); padding: 0.45rem 0.9rem 0.45rem 0.45rem; border-radius: 999px;
  border: 1px solid var(--c-border); background: var(--c-surface); color: var(--c-text); font-weight: 650; text-decoration: none;
  transition: border-color 200ms ease, background-color 200ms ease;
}
.topic-levels-nav a:hover { border-color: var(--c-accent); background: var(--c-accent-soft); }
.topic-levels-nav span { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--c-section); color: #ffffff; font-size: var(--fs-sm); }
.topic-level { margin-bottom: var(--space-7); scroll-margin-top: 8rem; }
.topic-level__head { display: flex; flex-wrap: wrap; align-items: baseline; gap: var(--space-1) var(--space-4); margin-bottom: var(--space-4); }
.topic-level__head h2 { margin: 0; }
.topic-level__head p { margin: 0; color: var(--c-text-muted); }
/* El camino: una línea vertical del color de la sección que une los números. */
.topic-path { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-3); position: relative; }
.topic-path::before {
  content: ""; position: absolute; left: 21px; top: 22px; bottom: 22px; width: 3px; border-radius: 3px;
  background: linear-gradient(var(--c-section), color-mix(in srgb, var(--c-section) 20%, transparent));
}
.topic-path__item {
  position: relative; display: flex; gap: var(--space-4); align-items: flex-start; padding: var(--space-3) var(--space-4) var(--space-3) 0;
  border-radius: var(--radius-lg); transition: background-color 200ms ease;
}
.topic-path__item:hover { background: color-mix(in srgb, var(--c-accent-soft) 70%, transparent); }
.topic-path__num {
  position: relative; display: inline-grid; place-items: center; width: 44px; height: 44px; flex: none; border-radius: 50%;
  background: var(--c-surface); border: 3px solid var(--c-section); color: var(--c-accent-hover); font-weight: 800;
  transition: background-color 200ms ease, color 200ms ease, scale 250ms var(--ease-out);
}
.topic-path__item:hover .topic-path__num { background: var(--c-section); color: #ffffff; scale: var(--pop, 1.08); }
.topic-path__body { display: grid; gap: var(--space-1); padding-top: 0.45rem; }
.topic-path__title { margin: 0; font-size: var(--fs-lg); }
.topic-path__note { margin: 0; color: var(--c-text-muted); }
.chip-list { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--space-2); }

/* Portada: los colores de Programación (lima) e IA (fucsia) se suman a la luz y al degradado. */
.hero { --hero-lime: #4d7c0f; --hero-fuchsia: #a21caf; }
:root[data-theme="dark"] .hero { --hero-lime: #a3e635; --hero-fuchsia: #e879f9; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .hero { --hero-lime: #a3e635; --hero-fuchsia: #e879f9; } }
.hero::before {
  background:
    radial-gradient(38rem 26rem at 8% 0%, rgb(59 130 246 / var(--hero-glow)), transparent 70%),
    radial-gradient(30rem 22rem at 55% calc(var(--h) * 0.1), rgb(20 184 166 / var(--hero-glow)), transparent 70%),
    radial-gradient(34rem 24rem at 95% calc(var(--h) * 0.35), rgb(167 139 250 / var(--hero-glow)), transparent 70%),
    radial-gradient(26rem 20rem at 38% calc(var(--h) * 0.6), rgb(217 70 239 / calc(var(--hero-glow) * 0.6)), transparent 70%),
    radial-gradient(30rem 20rem at 70% var(--h), rgb(245 158 11 / calc(var(--hero-glow) * 0.8)), transparent 70%),
    radial-gradient(28rem 20rem at 20% var(--h), rgb(244 63 94 / calc(var(--hero-glow) * 0.7)), transparent 70%),
    radial-gradient(26rem 18rem at 92% calc(var(--h) * 0.85), rgb(132 204 22 / calc(var(--hero-glow) * 0.7)), transparent 70%);
}
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .hero__accent {
    background-image: linear-gradient(90deg, var(--hero-blue), var(--hero-teal) 16%, var(--hero-lime) 32%, var(--hero-violet) 48%, var(--hero-fuchsia) 64%, var(--hero-rose) 80%, var(--hero-amber), var(--hero-blue));
    background-size: 200% 100%;
  }
}

/* 27. Animaciones ---------------------------------------------------------------------------------
   Todas usan opacidad, color o sombra, y el movimiento sale de estas variables. Con «reducir
   movimiento» (Windows: Configuración > Accesibilidad > Efectos visuales) las variables valen 0, así
   que las mismas animaciones siguen viéndose como fundidos y cambios de color, sin desplazamientos. */
:root { --rise: 22px; --lift: -4px; --pop: 1.08; --nudge: 4px; --drop: -8px; --ease-out: cubic-bezier(0.2, 0.8, 0.2, 1); }
@media (prefers-reduced-motion: reduce) {
  :root { --rise: 0px; --lift: 0px; --pop: 1; --nudge: 0px; --drop: 0px; --panel-shift: 0px; }
  .site-nav__link::after { transform: none; }
  .theme-toggle.is-switching .icon { animation-name: fade-in; }
}
@keyframes fade-in { from { opacity: 0; } }
@keyframes reveal-up { from { opacity: 0; translate: 0 var(--rise); } }
@keyframes glow-breathe { 0%, 100% { opacity: 1; } 50% { opacity: 0.55; } }
@keyframes glow-drift { 0%, 100% { translate: 0 0; } 50% { translate: 0 calc(var(--rise) * -0.8); } }
@keyframes gradient-flow { to { background-position: 200% 0; } }
@keyframes header-shadow { to { box-shadow: 0 6px 24px rgb(16 24 40 / 0.12); border-bottom-color: transparent; } }
@keyframes read-progress { from { transform: scaleX(0); } to { transform: scaleX(1); } }

/* Entre páginas: fundido suave al navegar, con la cabecera fija en su sitio (navegadores compatibles). */
@view-transition { navigation: auto; }
.site-header { view-transition-name: site-header; }
::view-transition-old(root) { animation: 160ms ease both reverse fade-in; }
::view-transition-new(root) { animation: 260ms ease both fade-in; }

/* Al cargar: la cabecera de cada página y la portada aparecen escalonadas. */
.page-hero > *, .article__header > *, .hero__main > *, .hero-demo, .breadcrumbs {
  animation: reveal-up 600ms var(--ease-out) both;
}
.page-hero > :nth-child(2), .article__header > :nth-child(2), .hero__main > :nth-child(2) { animation-delay: 80ms; }
.page-hero > :nth-child(3), .article__header > :nth-child(3), .hero__main > :nth-child(3) { animation-delay: 160ms; }
.page-hero > :nth-child(n+4), .article__header > :nth-child(n+4), .hero__main > :nth-child(n+4), .hero-demo { animation-delay: 240ms; }
.section-card { animation: reveal-up 700ms var(--ease-out) both; }
.section-card:nth-child(2) { animation-delay: 70ms; }
.section-card:nth-child(3) { animation-delay: 140ms; }
.section-card:nth-child(4) { animation-delay: 210ms; }
.section-card:nth-child(5) { animation-delay: 280ms; }
.section-card:nth-child(6) { animation-delay: 350ms; }
.section-card:nth-child(7) { animation-delay: 420ms; }

/* La luz de la portada «respira» (opacidad) y, si se permite el movimiento, flota despacio; el titular
   recorre los colores de todas las secciones. */
.hero::before { animation: glow-breathe 9s ease-in-out infinite, glow-drift 14s ease-in-out infinite; }
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  @media (prefers-reduced-motion: no-preference) { .hero__accent { animation: gradient-flow 12s linear infinite; } }
}

/* Al desplazarte, el contenido aparece al entrar en pantalla (animación ligada al scroll, sin
   JavaScript; donde no hay soporte, todo se ve directamente). */
/* En las páginas de herramientas no: ahí nada interactivo debe moverse mientras se usa. */
@supports (animation-timeline: view()) {
  :root:not([data-tool-slug]) :is(.card, .tool-cat, .topic-path__item, .fig-figure, .route-step, .prose > h2, .prose > .table-wrap,
  .sources, .related, .hub-section > h2, .footer-nav, .footer-about, .section__head, .steps > li, .features > li) {
    animation: reveal-up linear both; animation-timeline: view(); animation-range: entry 0% entry 55%;
  }
  .section-card { animation-timeline: auto; }
  /* Las ilustraciones (a veces muy altas) terminan de aparecer enseguida. */
  :root:not([data-tool-slug]) .fig-figure { animation-range: entry 0px entry 160px; }
  /* La sombra de la cabecera aparece al bajar los primeros píxeles. */
  .site-header { animation: header-shadow linear both; animation-timeline: scroll(root); animation-range: 0 120px; }
}

/* Barra de lectura en las guías, ligada al desplazamiento (la mueve el usuario, así que se mantiene). */
.read-progress { position: absolute; left: 0; right: 0; bottom: -1px; height: 3px; background: var(--c-section); transform-origin: left; transform: scaleX(0); pointer-events: none; }
@supports (animation-timeline: scroll()) {
  .read-progress { animation: read-progress linear both; animation-timeline: scroll(root); }
}
@supports not (animation-timeline: scroll()) { .read-progress { display: none; } }

/* Interacciones: las tarjetas se elevan, sus iconos crecen y las flechas avanzan. Con «reducir
   movimiento» quedan la sombra, el borde y el color. */
.card, .tool-cat, .section-card {
  transition: box-shadow 250ms ease, border-color 250ms ease, translate 300ms var(--ease-out), background-color 250ms ease;
}
.card:hover, .tool-cat:hover, .section-card:hover { translate: 0 var(--lift); transform: none; }
.card__icon, .tool-cat__icon, .section-card__icon, .site-nav__icon {
  transition: scale 300ms var(--ease-out), background-color 250ms ease, color 250ms ease, box-shadow 250ms ease;
}
.card:hover .card__icon, .tool-cat:hover .tool-cat__icon, .section-card:hover .section-card__icon, .site-nav__link:hover .site-nav__icon {
  scale: var(--pop);
}
.card:hover .card__icon { background: var(--c-accent); color: var(--c-on-accent); }
[data-cat] .card:hover .card__icon, .tool-cat:hover .tool-cat__icon { background: var(--cat); color: #ffffff; }
.section-card:hover .section-card__icon { box-shadow: 0 0 0 6px color-mix(in srgb, var(--c-section) 22%, transparent); }
.site-nav__link:hover .site-nav__icon { background: var(--c-section); color: #ffffff; }
.card__more .icon, .section__link .icon, .btn .icon--arrow-right, .chip--more .icon { transition: translate 250ms var(--ease-out); }
.card:hover .card__more .icon, .section__link:hover .icon, .btn:hover .icon--arrow-right, .chip--more:hover .icon { translate: var(--nudge) 0; }
.btn { transition: background-color 200ms ease, border-color 200ms ease, color 200ms ease, box-shadow 200ms ease, scale 150ms ease; }
.btn--primary:hover { box-shadow: 0 6px 18px color-mix(in srgb, var(--c-accent) 30%, transparent); }
.btn:active:not([disabled]) { scale: calc(1 - (var(--pop) - 1) * 0.4); }
.chip { transition: border-color 200ms ease, background-color 200ms ease, color 200ms ease, translate 250ms var(--ease-out); }
.chip:hover { border-color: var(--c-accent); background: var(--c-accent-soft); translate: 0 calc(var(--lift) / 2); }
.section-card__links a, .related__list a, .footer-nav a, .breadcrumbs a { transition: color 200ms ease, background-color 200ms ease; }

/* Luz que sigue al ratón en las tarjetas grandes (la posición la pone ui/motion.js). */
.section-card, .tool-cat { position: relative; isolation: isolate; }
.section-card::after, .tool-cat::after {
  content: ""; position: absolute; inset: 0; z-index: -1; border-radius: inherit; pointer-events: none; opacity: 0;
  background: radial-gradient(22rem circle at var(--mx, 50%) var(--my, 0%), color-mix(in srgb, var(--c-section, var(--cat)) 14%, transparent), transparent 60%);
  transition: opacity 300ms ease;
}
.tool-cat::after { background: radial-gradient(22rem circle at var(--mx, 50%) var(--my, 0%), color-mix(in srgb, var(--cat) 14%, transparent), transparent 60%); }
.section-card:hover::after, .tool-cat:hover::after { opacity: 1; }

/* Menú móvil: se despliega con un fundido (y desde arriba si se permite el movimiento). */
@media (max-width: 999.98px) {
  .site-nav.is-open .site-nav__item { animation: reveal-up 380ms var(--ease-out) both; }
  .site-nav.is-open .site-nav__item:nth-child(2) { animation-delay: 30ms; }
  .site-nav.is-open .site-nav__item:nth-child(3) { animation-delay: 60ms; }
  .site-nav.is-open .site-nav__item:nth-child(4) { animation-delay: 90ms; }
  .site-nav.is-open .site-nav__item:nth-child(5) { animation-delay: 120ms; }
  .site-nav.is-open .site-nav__item:nth-child(6) { animation-delay: 150ms; }
  .site-nav.is-open .site-nav__item:nth-child(7) { animation-delay: 180ms; }
}
@media (min-width: 1000px) { :root { --header-h: 6.75rem; } }

/* La línea de colores de todas las secciones en lo alto de la cabecera. */
.site-header::before {
  content: ""; display: block; height: 3px;
  background: linear-gradient(90deg, #3b82f6, #14b8a6, #84cc16, #a78bfa, #d946ef, #f43f5e, #f59e0b, #3b82f6);
  background-size: 200% 100%;
}
@media (prefers-reduced-motion: no-preference) { .site-header::before { animation: gradient-flow 16s linear infinite; } }

/* El cambio de tema claro/oscuro se funde en lugar de saltar. */
.site-header, .site-footer, .card, .tool-cat, .section-card, .hero-demo { transition-property: background-color, color, border-color, box-shadow, translate; transition-duration: 300ms; }
.card, .tool-cat, .section-card { transition-timing-function: ease, ease, ease, ease, var(--ease-out); }

@media print { .read-progress, .site-header::before { display: none; } }

/* 28. Fotos de las guías y las rutas (dominio público, alojadas en la propia web) -------------------- */
.photo { margin: var(--space-6) 0; }
.photo img {
  display: block; width: 100%; height: auto; aspect-ratio: 3 / 2; object-fit: cover; border-radius: var(--radius-lg);
  background: var(--c-surface-2); box-shadow: var(--shadow);
}
.photo figcaption { margin-top: var(--space-2); font-size: 0.75rem; text-align: right; }
.photo figcaption a { color: var(--c-text-muted); text-decoration: none; }
.photo figcaption a:hover { color: var(--c-accent); text-decoration: underline; }
/* La primera foto de cada guía, como portada apaisada bajo el título. */
.photo--cover { margin: var(--space-2) 0 var(--space-5); }
.photo--cover img { aspect-ratio: 21 / 9; }
/* Las rutas: tres fotos en fila (una sola columna en el móvil). */
/* Zoom suave al pasar el ratón (con «reducir movimiento», solo se aclara un poco). */
.photo { overflow: visible; }
.photo img { transition: scale 600ms var(--ease-out), filter 400ms ease; }
.photo:hover img { scale: calc(1 + (var(--pop) - 1) * 0.25); filter: saturate(1.08) brightness(1.03); }
@supports (animation-timeline: view()) {
  :root:not([data-tool-slug]) .photo { animation: reveal-up linear both; animation-timeline: view(); animation-range: entry 0% entry 55%; }
  .photo--cover { animation: reveal-up 700ms var(--ease-out) both; animation-timeline: auto; }
}

/* 29. Programación: un color por lenguaje, tarjetas, lecciones y ejercicios --------------------------
   --lang es el color vivo (decoración); --lang-l y --lang-d, los tonos para texto y botones en tema
   claro y oscuro, con contraste suficiente sobre las superficies. */
[data-lang="javascript"] { --lang: #eab308; --lang-l: #854d0e; --lang-d: #fde047; }
[data-lang="sql"] { --lang: #10b981; --lang-l: #047857; --lang-d: #6ee7b7; }
[data-lang="html-css"] { --lang: #f97316; --lang-l: #c2410c; --lang-d: #fdba74; }
[data-lang="python"] { --lang: #3b82f6; --lang-l: #1d4ed8; --lang-d: #93c5fd; }
[data-lang="bash"] { --lang: #84cc16; --lang-l: #3f6212; --lang-d: #bef264; }
[data-lang="typescript"] { --lang: #6366f1; --lang-l: #4338ca; --lang-d: #a5b4fc; }
[data-lang="java"] { --lang: #ef4444; --lang-l: #b91c1c; --lang-d: #fca5a5; }
[data-lang="csharp"] { --lang: #8b5cf6; --lang-l: #6d28d9; --lang-d: #c4b5fd; }
[data-lang="powershell"] { --lang: #0ea5e9; --lang-l: #0369a1; --lang-d: #7dd3fc; }
[data-lang="cpp"] { --lang: #14b8a6; --lang-l: #0f766e; --lang-d: #5eead4; }
[data-lang="c"] { --lang: #64748b; --lang-l: #334155; --lang-d: #cbd5e1; }
[data-lang="rust"] { --lang: #d97706; --lang-l: #92400e; --lang-d: #fcd34d; }
[data-lang="php"] { --lang: #d946ef; --lang-l: #a21caf; --lang-d: #f0abfc; }
[data-lang="go"] { --lang: #06b6d4; --lang-l: #0e7490; --lang-d: #67e8f9; }
[data-lang="kotlin"] { --lang: #ec4899; --lang-l: #be185d; --lang-d: #f9a8d4; }
[data-lang] {
  --c-section: var(--lang); --c-accent: var(--lang-l); --c-accent-hover: color-mix(in srgb, var(--lang-l) 82%, #000);
  --c-accent-soft: color-mix(in srgb, var(--lang) 12%, #ffffff); --c-on-accent: #ffffff; --c-focus: var(--lang-l);
}
:root[data-theme="dark"] [data-lang] {
  --c-accent: var(--lang-d); --c-accent-hover: color-mix(in srgb, var(--lang-d) 75%, #ffffff);
  --c-accent-soft: color-mix(in srgb, var(--lang) 16%, #1f2937); --c-on-accent: #0b1220; --c-focus: var(--lang-d);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) [data-lang] {
    --c-accent: var(--lang-d); --c-accent-hover: color-mix(in srgb, var(--lang-d) 75%, #ffffff);
    --c-accent-soft: color-mix(in srgb, var(--lang) 16%, #1f2937); --c-on-accent: #0b1220; --c-focus: var(--lang-d);
  }
}

/* Insignia con las siglas del lenguaje, sobre su color (texto claro u oscuro según el tema). */
.lang-badge {
  position: relative; display: inline-grid; place-items: center; flex: none; width: 52px; height: 52px; border-radius: 16px;
  background: linear-gradient(145deg, var(--c-accent), var(--c-accent-hover));
  color: var(--c-on-accent); font: 800 1.05rem/1 var(--font-mono); letter-spacing: -0.02em;
  box-shadow: 0 8px 22px -8px color-mix(in srgb, var(--lang) 70%, transparent), inset 0 1px 0 rgb(255 255 255 / 0.25);
  overflow: hidden;
}
/* Brillo que cruza la insignia al pasar el ratón. */
.lang-badge::after {
  content: ""; position: absolute; inset: -40% auto -40% -60%; width: 40%; rotate: 20deg;
  background: linear-gradient(90deg, transparent, rgb(255 255 255 / 0.45), transparent); opacity: 0;
}
.lang-badge--xl { width: 88px; height: 88px; border-radius: 26px; font-size: 1.6rem; }
.lang-badge--sm { width: 30px; height: 30px; border-radius: 9px; font-size: 0.7rem; box-shadow: none; }
@keyframes badge-shine { from { opacity: 1; translate: 0 0; } to { opacity: 0; translate: 380% 0; } }

/* Portada de Programación: rejilla de lenguajes. */
.lang-hub { margin-bottom: var(--space-7); }
.lang-hub__head { margin-bottom: var(--space-4); }
.lang-hub__head h2 { display: flex; align-items: center; gap: var(--space-2); margin: 0 0 var(--space-1); }
.lang-hub__head p { margin: 0; color: var(--c-text-muted); max-width: 60ch; }
.lang-hub__head--fund { margin-top: var(--space-2); }
.lang-grid { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-4); grid-template-columns: repeat(auto-fill, minmax(min(100%, 16.5rem), 1fr)); }
.lang-card {
  position: relative; isolation: isolate; display: flex; gap: var(--space-4); align-items: flex-start; padding: var(--space-4) var(--space-4) var(--space-5);
  border: 1px solid var(--c-border); border-radius: var(--radius-lg); background: var(--c-surface); box-shadow: var(--shadow-sm); overflow: hidden;
  transition: box-shadow 250ms ease, border-color 250ms ease, translate 300ms var(--ease-out);
}
/* Franja superior y halo del color del lenguaje. */
.lang-card::before { content: ""; position: absolute; inset: 0 0 auto; height: 4px; background: linear-gradient(90deg, var(--lang), color-mix(in srgb, var(--lang) 35%, transparent)); }
.lang-card::after {
  content: ""; position: absolute; z-index: -1; width: 12rem; height: 12rem; right: -5rem; top: -6rem; border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--lang) 22%, transparent), transparent 70%); opacity: 0.55; transition: opacity 300ms ease, scale 400ms var(--ease-out);
}
.lang-card:hover { translate: 0 var(--lift); border-color: color-mix(in srgb, var(--lang) 55%, var(--c-border)); box-shadow: 0 14px 34px -16px color-mix(in srgb, var(--lang) 60%, transparent), var(--shadow); }
.lang-card:hover::after { opacity: 1; scale: 1.25; }
.lang-card:hover .lang-badge { scale: var(--pop); rotate: -4deg; }
.lang-card:hover .lang-badge::after { animation: badge-shine 700ms ease-out; }
.lang-card .lang-badge { transition: scale 300ms var(--ease-out), rotate 300ms var(--ease-out); }
.lang-card__body { display: grid; gap: var(--space-1); min-width: 0; flex: 1; }
.lang-card__rank { margin: 0; font-size: var(--fs-sm); font-weight: 650; color: var(--c-text-muted); }
.lang-card__rank span { display: inline-block; margin-right: 0.3rem; padding: 0.05rem 0.45rem; border-radius: 999px; background: var(--c-accent-soft); color: var(--c-text); font-weight: 800; }
.lang-card__title { margin: 0; font-size: 1.25rem; }
.lang-card__text { margin: 0; color: var(--c-text-muted); font-size: 0.95rem; }
.lang-card__meta { margin: var(--space-1) 0 0; display: flex; flex-wrap: wrap; gap: var(--space-1) var(--space-3); font-size: var(--fs-sm); font-weight: 600; }
.lang-card__meta [data-lang-done] { color: var(--c-accent); }
.lang-card__bar { position: absolute; left: 0; right: 0; bottom: 0; height: 4px; background: transparent; }
.lang-card__bar span { display: block; height: 100%; width: calc(var(--done, 0) * 100%); background: var(--lang); transition: width 600ms var(--ease-out); }

/* Página de un lenguaje: cabecera, índice lateral y lecciones. */
.lang-hero { display: flex; gap: var(--space-5); align-items: center; padding-block: var(--space-6) var(--space-5); }
.lang-hero__body > * { animation: reveal-up 600ms var(--ease-out) both; }
.lang-hero__body > :nth-child(2) { animation-delay: 80ms; }
.lang-hero__body > :nth-child(n+3) { animation-delay: 160ms; }
.lang-hero .lang-badge--xl { animation: badge-pop 700ms var(--ease-out) both; }
@keyframes badge-pop { from { opacity: 0; scale: calc(1 - (var(--pop) - 1) * 3); rotate: calc((var(--pop) - 1) * -150deg); } }
.lang-hero h1 { margin-bottom: var(--space-2); }
.lang-hero__stats { list-style: none; margin: var(--space-3) 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--space-2); }
.lang-hero__stats li { padding: 0.3rem 0.85rem; border-radius: 999px; background: var(--c-accent-soft); border: 1px solid color-mix(in srgb, var(--lang) 30%, transparent); font-size: var(--fs-sm); }
.lang-hero__stats strong { font-size: 1rem; }
.lang-hero__stats a { margin-left: 1px; color: inherit; text-decoration: none; }
@media (max-width: 559.98px) { .lang-hero { flex-direction: column; align-items: flex-start; gap: var(--space-3); } }

.lang-layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-6); padding-bottom: var(--space-7); }
@media (min-width: 1000px) { .lang-layout { grid-template-columns: 17rem minmax(0, 1fr); align-items: start; } }
.lang-toc__inner { display: grid; gap: var(--space-2); padding: var(--space-4); border: 1px solid var(--c-border); border-radius: var(--radius-lg); background: var(--c-surface); }
@media (min-width: 1000px) { .lang-toc { position: sticky; top: calc(var(--header-h) + var(--space-4)); max-height: calc(100vh - var(--header-h) - var(--space-6)); overflow: auto; } }
@media (max-width: 999.98px) { .lang-toc__list, .lang-toc__level { display: none; } }
.lang-toc__level { margin: var(--space-2) 0 0; font-size: 0.75rem; font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase; color: var(--c-text-muted); }
.lang-toc__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.lang-toc__list a {
  display: flex; gap: var(--space-2); align-items: center; padding: 0.35rem 0.5rem; border-radius: var(--radius-sm);
  color: var(--c-text); text-decoration: none; font-size: 0.92rem; line-height: 1.3; transition: background-color 200ms ease, color 200ms ease;
}
.lang-toc__list a:hover { background: var(--c-accent-soft); }
.lang-toc__list a[aria-current] { background: var(--c-accent-soft); font-weight: 700; box-shadow: inset 3px 0 0 var(--lang); }
.lang-toc__num {
  display: inline-grid; place-items: center; width: 24px; height: 24px; flex: none; border-radius: 50%;
  border: 2px solid color-mix(in srgb, var(--lang) 60%, var(--c-border)); font-size: 0.75rem; font-weight: 800;
  transition: background-color 250ms ease, color 250ms ease, scale 250ms var(--ease-out);
}
.lang-toc__list a.is-done .lang-toc__num { background: var(--c-accent); border-color: var(--c-accent); color: var(--c-on-accent); }
.lang-progress { display: grid; gap: var(--space-2); padding-bottom: var(--space-2); border-bottom: 1px solid var(--c-border); }
.lang-progress__text { margin: 0; font-weight: 650; font-size: var(--fs-sm); }

.lang-intro { padding: var(--space-5); border-radius: var(--radius-lg); background: linear-gradient(135deg, var(--c-accent-soft), var(--c-surface) 70%); border: 1px solid var(--c-border); }
.lang-intro h2 { margin-top: 0; }
.lang-uses { list-style: none; margin: var(--space-3) 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--space-2); }
.lang-uses li { display: inline-flex; align-items: center; gap: var(--space-1); padding: 0.3rem 0.75rem; border-radius: 999px; background: var(--c-surface); border: 1px solid var(--c-border); font-size: var(--fs-sm); font-weight: 600; }
.lang-uses .icon { width: 16px; height: 16px; color: var(--c-accent); }
.lang-start { display: flex; gap: var(--space-2); align-items: flex-start; margin: 0; }
.lang-start .icon { flex: none; margin-top: 0.2rem; color: var(--c-accent); }

.lang-level { display: flex; align-items: center; gap: var(--space-3); margin: var(--space-7) 0 var(--space-4); scroll-margin-top: 8rem; }
.lang-level::after { content: ""; flex: 1; height: 2px; border-radius: 2px; background: linear-gradient(90deg, var(--lang), transparent); }
.lang-level__tag { padding: 0.2rem 0.65rem; border-radius: 999px; background: var(--c-accent); color: var(--c-on-accent); font-size: var(--fs-sm); font-weight: 800; }

/* Cada lección es una tarjeta; al completarla, su número se vuelve una marca de verificación. */
.lesson {
  position: relative; margin-bottom: var(--space-5); padding: var(--space-5); border: 1px solid var(--c-border); border-radius: var(--radius-lg);
  background: var(--c-surface); box-shadow: var(--shadow-sm); scroll-margin-top: 7rem; transition: border-color 300ms ease, box-shadow 300ms ease;
}
.lesson::before { content: ""; position: absolute; left: -1px; top: var(--space-5); bottom: var(--space-5); width: 4px; border-radius: 0 4px 4px 0; background: linear-gradient(var(--lang), color-mix(in srgb, var(--lang) 15%, transparent)); }
.lesson:target { border-color: var(--c-accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--lang) 20%, transparent); }
.lesson.is-done { border-color: color-mix(in srgb, var(--c-success-border) 70%, var(--c-border)); }
.lesson__head { display: flex; gap: var(--space-3); align-items: center; margin-bottom: var(--space-3); }
.lesson__num {
  display: inline-grid; place-items: center; width: 46px; height: 46px; flex: none; border-radius: 14px;
  background: var(--c-accent-soft); border: 2px solid color-mix(in srgb, var(--lang) 55%, transparent); font-weight: 800; font-size: 1.1rem;
}
.lesson__kind { margin: 0; font-size: 0.78rem; font-weight: 800; letter-spacing: 0.06em; text-transform: uppercase; color: var(--c-text-muted); }
.lesson__title { margin: 0; font-size: 1.3rem; }
.lesson__done-mark { margin-left: auto; display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: var(--c-success-bg); color: var(--c-success-text); opacity: 0; scale: 0.5; transition: opacity 300ms ease, scale 400ms var(--ease-out); }
.lesson.is-done .lesson__done-mark { opacity: 1; scale: 1; }
.lesson__text p { margin: 0 0 var(--space-3); }

/* Bloque de código con aspecto de editor (oscuro en los dos temas). */
.code-block { margin: var(--space-4) 0; border-radius: var(--radius); overflow: hidden; background: #0f172a; border: 1px solid #1e293b; box-shadow: 0 10px 24px -14px rgb(2 6 23 / 0.5); }
.code-block__bar { display: flex; align-items: center; gap: var(--space-3); padding: 0.45rem 0.75rem; background: #1e293b; color: #cbd5e1; font-size: 0.8rem; font-weight: 650; }
.code-block__dots { display: inline-flex; gap: 6px; }
.code-block__dots::before { content: ""; width: 10px; height: 10px; border-radius: 50%; background: #f87171; box-shadow: 16px 0 0 #fbbf24, 32px 0 0 #4ade80; margin-right: 32px; }
.code-block__copy {
  margin-left: auto; display: inline-flex; align-items: center; gap: 0.35rem; padding: 0.25rem 0.6rem; border-radius: 6px; cursor: pointer;
  border: 1px solid #475569; background: transparent; color: #e2e8f0; font: inherit; transition: background-color 200ms ease, border-color 200ms ease;
}
.code-block__copy:hover { background: #334155; border-color: #64748b; }
.code-block__copy .icon { width: 15px; height: 15px; }
.code-block pre { margin: 0; padding: var(--space-4); overflow-x: auto; background: none; border: 0; color: #e2e8f0; font-size: 0.9rem; line-height: 1.6; tab-size: 4; }
.code-block code { background: none; padding: 0; color: inherit; font-size: inherit; }
.code-block pre:focus-visible { outline: 3px solid var(--lang-d, #93c5fd); outline-offset: -3px; }

/* Ejercicio: marco punteado del color del lenguaje; acierto en verde y fallo con una sacudida. */
.exercise {
  margin: var(--space-4) 0; padding: var(--space-4); border-radius: var(--radius); border: 2px dashed color-mix(in srgb, var(--lang) 55%, var(--c-border));
  background: color-mix(in srgb, var(--c-accent-soft) 55%, var(--c-surface)); transition: border-color 300ms ease, background-color 300ms ease;
}
.exercise.is-solved { border-style: solid; border-color: var(--c-success-border); background: color-mix(in srgb, var(--c-success-bg) 60%, var(--c-surface)); }
.exercise.is-wrong { animation: shake 400ms ease; }
@keyframes shake { 20%, 60% { translate: calc(var(--nudge) * -1.5) 0; } 40%, 80% { translate: calc(var(--nudge) * 1.5) 0; } }
.exercise__label { display: flex; align-items: center; gap: var(--space-1); margin: 0 0 var(--space-1); font-size: 0.78rem; font-weight: 800; letter-spacing: 0.08em; text-transform: uppercase; }
.exercise__label .icon { width: 16px; height: 16px; color: var(--c-accent); }
.exercise__q { margin: 0 0 var(--space-3); font-weight: 650; }
.exercise__options { display: grid; gap: var(--space-2); }
.exercise__option {
  display: flex; align-items: center; gap: var(--space-3); width: 100%; padding: 0.6rem 0.8rem; border-radius: var(--radius-sm); cursor: pointer;
  border: 1px solid var(--c-border-strong); background: var(--c-surface); color: var(--c-text); font: inherit; text-align: left;
  transition: border-color 200ms ease, background-color 200ms ease, translate 250ms var(--ease-out), box-shadow 200ms ease;
}
.exercise__option:hover:not(:disabled) { border-color: var(--c-accent); translate: calc(var(--nudge) / 2) 0; box-shadow: var(--shadow-sm); }
.exercise__option:disabled { cursor: default; }
.exercise__option:disabled:not(.is-right) { opacity: 0.6; }
.exercise__letter { display: inline-grid; place-items: center; width: 28px; height: 28px; flex: none; border-radius: 8px; background: var(--c-accent-soft); font: 800 0.85rem/1 var(--font-mono); transition: background-color 200ms ease, color 200ms ease; }
.exercise__option.is-right { border-color: var(--c-success-border); background: var(--c-success-bg); color: var(--c-success-text); }
.exercise__option.is-right .exercise__letter { background: var(--c-success-text); color: var(--c-success-bg); animation: pop-in 400ms var(--ease-out); }
.exercise__option.is-wrong { border-color: var(--c-danger-border); background: var(--c-danger-bg); color: var(--c-danger-text); }
@keyframes pop-in { 50% { scale: calc(1 + (var(--pop) - 1) * 3); } }
.exercise__code { margin: 0 0 var(--space-3); padding: var(--space-3) var(--space-4); border-radius: var(--radius-sm); background: #0f172a; color: #e2e8f0; overflow-x: auto; font-size: 0.92rem; line-height: 1.7; }
.exercise__code code { background: none; padding: 0; color: inherit; }
.exercise__input {
  min-width: 3ch; padding: 0.05rem 0.35rem; border: 0; border-bottom: 2px solid var(--lang-d, #93c5fd); border-radius: 4px 4px 0 0;
  background: #1e293b; color: #f8fafc; font: inherit; transition: border-color 200ms ease, background-color 200ms ease;
}
.exercise__input:focus { outline: 2px solid var(--lang-d, #93c5fd); outline-offset: 2px; }
.exercise__input.is-right { border-bottom-color: #4ade80; background: #14532d; }
.exercise__input.is-wrong { border-bottom-color: #f87171; background: #450a0a; }
.exercise__actions { margin-bottom: var(--space-2); }
.exercise__feedback { margin: var(--space-2) 0 0; min-height: 1.5em; font-weight: 700; }
.exercise__feedback.is-ok { color: var(--c-success-text); }
.exercise__feedback.is-bad { color: var(--c-danger-text); }
.exercise__solution { margin-top: var(--space-2); font-size: 0.95rem; }
.exercise__solution summary { cursor: pointer; font-weight: 650; color: var(--c-text-muted); width: fit-content; }
.exercise__solution summary:hover { color: var(--c-accent); }
.exercise__solution p { margin: var(--space-2) 0 0; }

.lesson__foot { display: grid; gap: var(--space-4); margin-top: var(--space-4); padding-top: var(--space-4); border-top: 1px solid var(--c-border); }
@media (min-width: 700px) { .lesson__foot { grid-template-columns: 1fr 1fr; } .lesson__done { grid-column: 1 / -1; } }
.lesson__foot-title { display: flex; align-items: center; gap: var(--space-1); margin: 0 0 var(--space-2); font-size: var(--fs-sm); font-weight: 800; }
.lesson__foot-title .icon { width: 16px; height: 16px; color: var(--c-accent); }
.chip--term { font-size: var(--fs-sm); }
.lesson__guide-list { margin: 0; padding-left: 1.1rem; display: grid; gap: var(--space-1); font-size: 0.95rem; }
.lesson__done { width: fit-content; padding: 0.45rem 0.8rem; border-radius: 999px; border: 1px solid var(--c-border); background: var(--c-surface-2); transition: background-color 200ms ease, border-color 200ms ease; }
.lesson__done:hover { border-color: var(--c-accent); }
.lesson.is-done .lesson__done { background: var(--c-success-bg); border-color: var(--c-success-border); color: var(--c-success-text); }

.lang-end { margin-top: var(--space-7); padding: var(--space-5); border-radius: var(--radius-lg); border: 1px solid var(--c-border); background: linear-gradient(160deg, var(--c-accent-soft), var(--c-surface) 60%); }
.lang-end h2 { display: flex; align-items: center; gap: var(--space-2); margin-top: 0; }
.lang-sources { margin-top: var(--space-5); }
.lang-others { margin-top: var(--space-6); }
.lang-chips { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: var(--space-2); }
.lang-chips a {
  display: inline-flex; align-items: center; gap: var(--space-2); padding: 0.3rem 0.8rem 0.3rem 0.3rem; border-radius: 999px;
  border: 1px solid var(--c-border); background: var(--c-surface); color: var(--c-text); font-weight: 650; text-decoration: none;
  transition: border-color 200ms ease, translate 250ms var(--ease-out), box-shadow 200ms ease;
}
.lang-chips a:hover { border-color: var(--lang); translate: 0 calc(var(--lift) / 2); box-shadow: 0 6px 16px -10px var(--lang); }
@supports (animation-timeline: view()) {
  :root:not([data-tool-slug]) :is(.lesson, .lang-card, .lang-intro) { animation: reveal-up linear both; animation-timeline: view(); animation-range: entry 0px entry 140px; }
}

/* 30. Portada: «Recomendación del día» -------------------------------------------------------------
   Seis tarjetas con el color de su sección, una luz de fondo que flota, un borde de colores que gira
   en la tarjeta principal y entrada escalonada al llegar (con «reducir movimiento», solo fundidos). */
@property --daily-angle { syntax: "<angle>"; inherits: false; initial-value: 0deg; }
.daily { position: relative; isolation: isolate; overflow: hidden; }
.daily__glow {
  position: absolute; z-index: -1; inset: -20% -10% auto; height: 120%; pointer-events: none;
  background:
    radial-gradient(30rem 20rem at 15% 20%, rgb(59 130 246 / 0.12), transparent 70%),
    radial-gradient(26rem 18rem at 85% 10%, rgb(217 70 239 / 0.1), transparent 70%),
    radial-gradient(28rem 20rem at 60% 90%, rgb(132 204 22 / 0.1), transparent 70%);
  animation: glow-breathe 10s ease-in-out infinite, glow-drift 16s ease-in-out infinite;
}
.daily__head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-end; gap: var(--space-3) var(--space-5); margin-bottom: var(--space-5); }
.daily__intro { max-width: 46rem; }
.daily__eyebrow { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); margin: 0 0 var(--space-2); font-size: var(--fs-sm); font-weight: 800; letter-spacing: 0.06em; text-transform: uppercase; }
.daily__spark { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 10px; color: #ffffff; background: linear-gradient(135deg, #2563eb, #a21caf); box-shadow: 0 6px 16px -6px rgb(162 28 175 / 0.6); }
.daily__spark .icon { width: 17px; height: 17px; animation: spark-spin 6s linear infinite; }
@keyframes spark-spin { to { rotate: calc((var(--pop) - 1) * 4500deg); } }
.daily__date { font-weight: 600; letter-spacing: 0; text-transform: none; color: var(--c-text-muted); }
.daily__date:not(:empty)::before { content: "·"; margin-right: var(--space-2); }
@media (max-width: 559.98px) { .daily__date { flex-basis: 100%; } .daily__date:not(:empty)::before { content: none; } }
.daily__title { margin: 0 0 var(--space-2); font-size: clamp(1.6rem, 1.3rem + 1.4vw, 2.3rem); }
.daily__theme { background-image: linear-gradient(transparent 62%, color-mix(in srgb, #a78bfa 35%, transparent) 62%); background-repeat: no-repeat; background-size: 100% 100%; }
.daily__text { margin: 0; color: var(--c-text-muted); font-size: var(--fs-lg); }
.daily__renew { display: inline-flex; align-items: center; gap: var(--space-2); margin: 0; padding: 0.35rem 0.85rem; border-radius: 999px; border: 1px solid var(--c-border); background: var(--c-surface); font-size: var(--fs-sm); font-weight: 650; }
.daily__renew .icon { width: 16px; height: 16px; }

.daily__grid { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-4); grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); }
@media (min-width: 900px) {
  /* Principal a la izquierda (dos filas), cuatro tarjetas en 2 × 2 y el extra como franja final. */
  .daily__grid { grid-template-columns: 1.35fr 1fr 1fr; grid-template-rows: auto auto auto; }
  .daily__grid .daily-card--herramienta { grid-row: span 2; justify-content: center; }
  .daily__grid .daily-card--extra { grid-column: 1 / -1; min-height: 0; display: grid; grid-template-columns: auto auto 1fr auto; grid-template-rows: auto auto; column-gap: var(--space-4); align-items: center; padding-block: var(--space-4); }
  .daily__grid .daily-card--extra .daily-card__icon { grid-row: span 2; }
  .daily__grid .daily-card--extra .daily-card__kind { grid-column: 2; margin: 0; }
  .daily__grid .daily-card--extra .daily-card__title { grid-column: 2; }
  .daily__grid .daily-card--extra .daily-card__text { grid-column: 3; grid-row: 1 / span 2; }
  .daily__grid .daily-card--extra .daily-card__go { grid-column: 4; grid-row: 1 / span 2; margin: 0; align-self: center; }
}
.daily-card {
  position: relative; isolation: isolate; display: flex; flex-direction: column; gap: var(--space-2); min-height: 11rem; padding: var(--space-5);
  border-radius: var(--radius-lg); border: 1px solid var(--c-border); background: var(--c-surface); box-shadow: var(--shadow-sm); overflow: hidden;
  transition: box-shadow 250ms ease, border-color 250ms ease, translate 300ms var(--ease-out), opacity 400ms ease;
}
/* Mancha de color de la sección en la esquina y luz que sigue al ratón (ui/motion.js). */
.daily-card::before {
  content: ""; position: absolute; z-index: -1; width: 14rem; height: 14rem; right: -6rem; top: -7rem; border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--c-section) 26%, transparent), transparent 70%); transition: scale 500ms var(--ease-out), opacity 300ms ease; opacity: 0.7;
}
.daily-card::after {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none; opacity: 0; border-radius: inherit;
  background: radial-gradient(18rem circle at var(--mx, 50%) var(--my, 0%), color-mix(in srgb, var(--c-section) 14%, transparent), transparent 60%);
  transition: opacity 300ms ease;
}
.daily-card:hover { translate: 0 var(--lift); border-color: color-mix(in srgb, var(--c-section) 50%, var(--c-border)); box-shadow: 0 16px 36px -18px color-mix(in srgb, var(--c-section) 65%, transparent), var(--shadow); }
.daily-card:hover::before { scale: 1.3; opacity: 1; }
.daily-card:hover::after { opacity: 1; }
.daily-card__icon {
  display: inline-grid; place-items: center; width: 46px; height: 46px; border-radius: 14px; color: var(--c-on-accent);
  background: linear-gradient(140deg, var(--c-accent), var(--c-accent-hover));
  box-shadow: 0 8px 18px -8px color-mix(in srgb, var(--c-section) 80%, transparent); transition: scale 300ms var(--ease-out), rotate 300ms var(--ease-out);
}
.daily-card:hover .daily-card__icon { scale: var(--pop); rotate: -6deg; }
.daily-card__alt { display: none; }
[data-section="diagnostico"] > .daily-card__icon > [data-alt="diagnostico"], [data-section="recursos"] > .daily-card__icon > [data-alt="recursos"] { display: contents; }
.daily-card__kind { margin: var(--space-1) 0 0; font-size: 0.78rem; font-weight: 800; letter-spacing: 0.07em; text-transform: uppercase; color: var(--c-text-muted); }
.daily-card__title { margin: 0; font-size: 1.15rem; line-height: 1.3; }
.daily-card__text { margin: 0; color: var(--c-text-muted); font-size: 0.95rem; }
.daily-card__go { margin-top: auto; align-self: flex-end; display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; border: 1px solid var(--c-border); color: var(--c-accent); transition: background-color 250ms ease, color 250ms ease, translate 250ms var(--ease-out), border-color 250ms ease; }
.daily-card:hover .daily-card__go { background: var(--c-accent); border-color: var(--c-accent); color: var(--c-on-accent); translate: var(--nudge) 0; }

/* Tarjeta principal: más grande, con un borde de colores que gira despacio. */
.daily-card--herramienta { padding: var(--space-6); }
.daily-card--herramienta .daily-card__icon { width: 64px; height: 64px; border-radius: 20px; margin: 18px 0 14px 18px; }
.daily-card--herramienta .daily-card__icon .icon { width: 30px; height: 30px; }
.daily-card--herramienta .daily-card__title { font-size: 1.5rem; }
.daily-card--herramienta .daily-card__text { font-size: 1.02rem; }
.daily-card--herramienta {
  border: 2px solid transparent;
  background:
    linear-gradient(var(--c-surface), var(--c-surface)) padding-box,
    conic-gradient(from var(--daily-angle), #3b82f6, #14b8a6, #84cc16, #f59e0b, #f43f5e, #d946ef, #3b82f6) border-box;
}
@media (prefers-reduced-motion: no-preference) { .daily-card--herramienta { animation: daily-spin 9s linear infinite; } }
@keyframes daily-spin { to { --daily-angle: 360deg; } }
/* Órbitas decorativas detrás del icono principal. */
.daily-card--herramienta .daily-card__icon { position: relative; }
.daily-card--herramienta .daily-card__icon::before, .daily-card--herramienta .daily-card__icon::after {
  content: ""; position: absolute; inset: -12px; border-radius: 26px; border: 1px dashed color-mix(in srgb, var(--c-section) 55%, transparent); pointer-events: none;
}
.daily-card--herramienta .daily-card__icon::after { inset: -24px; border-radius: 32px; opacity: 0.5; }
@media (prefers-reduced-motion: no-preference) {
  .daily-card--herramienta .daily-card__icon::before { animation: orbit 14s linear infinite; }
  .daily-card--herramienta .daily-card__icon::after { animation: orbit 22s linear infinite reverse; }
}
@keyframes orbit { to { rotate: 360deg; } }

/* Entrada escalonada (solo con JavaScript; sin él, todo se ve desde el principio) y cambio de tema. */
.js .daily.is-armed:not(.is-visible) .daily-card { opacity: 0; translate: 0 var(--rise); }
.daily.is-visible .daily-card { animation: reveal-up 650ms var(--ease-out) both; }
.daily.is-visible .daily-card:nth-child(2) { animation-delay: 80ms; }
.daily.is-visible .daily-card:nth-child(3) { animation-delay: 160ms; }
.daily.is-visible .daily-card:nth-child(4) { animation-delay: 240ms; }
.daily.is-visible .daily-card:nth-child(5) { animation-delay: 320ms; }
.daily.is-visible .daily-card:nth-child(6) { animation-delay: 400ms; }
@media (prefers-reduced-motion: no-preference) { .daily.is-visible .daily-card--herramienta { animation: reveal-up 650ms var(--ease-out) both, daily-spin 9s linear 650ms infinite; } }
.daily.is-swapping .daily-card, .daily.is-swapping .daily__theme, .daily.is-swapping .daily__text { opacity: 0; transition: opacity 200ms ease; }
.daily__theme, .daily__text { transition: opacity 300ms ease; }