/* Subpáginas (unidades, subtemas, actividades). Usa los tokens de styles.css. */

.primary-nav a[aria-current="page"] { color: var(--blue); }

/* Encabezado de página */
.page-hero { padding-top: clamp(3rem, 6vw, 5rem); padding-bottom: clamp(1.8rem, 3.5vw, 2.6rem); }
.crumbs { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; margin: 0 0 1.5rem; font-size: .75rem; color: var(--muted); }
.crumbs a { color: var(--blue); font-weight: 700; }
.crumbs a:hover { text-decoration: underline; }
.crumbs [aria-hidden] { opacity: .6; }
.page-hero .eyebrow { flex-wrap: wrap; }
.page-hero h1 { max-width: 860px; margin: 0; font: 700 clamp(2.1rem, 4.4vw, 3.5rem)/1.12 var(--display); letter-spacing: -.06em; }
.page-hero .hero-lead { max-width: 640px; margin-top: 1.1rem; }

/* Contenedor de subpáginas: más ancho que la portada; el texto conserva su medida de lectura (ver .prose) */
:root { --shell-w: 1320px; --measure: 56rem; --toc-offset: 140px; }
@media (min-width: 821px) {
  .nav-wrap, .section-shell, .footer-inner, .footer-bottom, .toc-bar-inner, .toc-panel-inner { width: min(var(--shell-w), calc(100% - 48px)); }
}
html:has(.toc-bar) { scroll-padding-top: var(--toc-offset); }

/* Diseño documento: una columna (el índice vive en el encabezado). Solo la página de unidad conserva lateral. */
.doc-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: clamp(2rem, 5vw, 4.5rem); align-items: start; padding-bottom: clamp(3rem, 6vw, 5rem); }
.doc-layout-wide { grid-template-columns: minmax(0, 1fr); }
.doc-aside { position: sticky; top: 104px; display: grid; gap: 1rem; }
.aside-card { padding: 1.25rem 1.3rem; background: var(--white); border: 1px solid var(--line); border-radius: 12px; box-shadow: 0 10px 35px rgba(25,47,77,.04); }
.aside-card h2 { margin: 0 0 .8rem; color: var(--blue); font: 800 .66rem var(--sans); letter-spacing: .16em; text-transform: uppercase; }
.res-link { display: flex; justify-content: space-between; align-items: baseline; gap: .8rem; padding: .6rem 0; border-top: 1px solid #f0f2f6; color: var(--ink); font-size: .82rem; font-weight: 700; }
.res-link:first-of-type { border-top: 0; }
.res-link span:last-child { color: var(--blue); transition: transform .2s; }
.res-link:hover { color: var(--blue); }
.res-link:hover span:last-child { transform: translate(3px, -3px); }
.aside-card .profile-detail:first-of-type { padding-top: 0; }
.aside-card .profile-detail:last-of-type { border-bottom: 0; }

/* Índice «En esta página»: barra bajo el encabezado + panel desplegable (assets/js/toc.js) */
.toc-bar { border-top: 1px solid rgba(226,231,239,.8); }
.toc-bar-inner { min-height: 44px; display: flex; align-items: center; gap: 1rem; }
.toc-toggle { display: inline-flex; align-items: center; gap: .6rem; min-height: 36px; padding: .3rem .8rem; background: var(--white); border: 1px solid #d4dce7; border-radius: 99px; color: var(--navy); font: 800 .72rem var(--sans); letter-spacing: .02em; cursor: pointer; transition: border-color .2s, background .2s; }
.toc-toggle:hover, .toc-bar.is-open .toc-toggle { border-color: var(--blue); background: var(--blue-soft); }
.toc-toggle:focus-visible { outline: 3px solid #77a9d8; outline-offset: 2px; }
.toc-count { padding: .08rem .45rem; border-radius: 99px; background: var(--blue-soft); color: var(--blue); font: 800 .65rem var(--display); }
.toc-chev { flex: none; width: 7px; height: 7px; margin: -3px .1rem 0; border-right: 2px solid var(--blue); border-bottom: 2px solid var(--blue); transform: rotate(45deg); transition: transform .2s; }
.toc-bar.is-open .toc-chev { margin-top: 3px; transform: rotate(-135deg); }
.toc-current { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--ink-soft); font-size: .76rem; font-weight: 600; }
.toc-current:empty { display: none; }
/* El panel cuelga del encabezado (sticky), a todo el ancho, sin recortes por overflow */
.toc-panel { position: absolute; top: 100%; left: 0; right: 0; max-height: calc(100vh - 150px); max-height: calc(100dvh - 150px); overflow-y: auto; overscroll-behavior: contain; padding: 1.1rem 0 1.4rem; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 22px 30px rgba(25,47,77,.1); }
.toc-panel[hidden] { display: none; }
.toc-panel ol { margin: 0; padding: 0; list-style: none; counter-reset: toc; column-width: 19rem; column-gap: 2.5rem; }
.toc-panel li { counter-increment: toc; break-inside: avoid; }
.toc-panel a { display: grid; grid-template-columns: 1.9rem 1fr; align-items: baseline; min-height: 40px; padding: .5rem .5rem .5rem 0; border-radius: 6px; color: var(--ink-soft); font-size: .84rem; line-height: 1.45; overflow-wrap: anywhere; }
.toc-panel a::before { content: counter(toc, decimal-leading-zero); color: #a0aaba; font: 800 .66rem var(--display); }
.toc-panel a:hover, .toc-panel a[aria-current="location"] { color: var(--blue); }
.toc-panel a[aria-current="location"] { font-weight: 700; }
@media (prefers-reduced-motion: reduce) { .toc-chev { transition: none; } }

/* Enlaces de recurso sobre el documento */
.doc-links { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem .9rem; margin-bottom: clamp(1.4rem, 3vw, 2rem); }
.doc-links-title { color: var(--blue); font: 800 .66rem var(--sans); letter-spacing: .16em; text-transform: uppercase; }
.doc-links .res-link { display: inline-flex; padding: .45rem .8rem; background: var(--white); border: 1px solid var(--line); border-radius: 8px; font-size: .8rem; }

/* Texto largo */
.prose { min-width: 0; color: #2a3a52; font-size: 1rem; line-height: 1.85; }
.prose > :first-child { margin-top: 0; }
/* Medida de lectura: el texto no se estira; tablas, código, diagramas y laboratorios usan el ancho del contenedor */
.prose > :is(p, ul, ol, h2, h3, h4, h5, hr, blockquote, .callout) { max-width: var(--measure); }
.prose h2 { margin: 3rem 0 .9rem; padding-top: 2rem; border-top: 1px solid var(--line); color: var(--ink); font: 700 clamp(1.45rem, 2.6vw, 1.85rem)/1.25 var(--display); letter-spacing: -.045em; }
.prose > h2:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
.prose h3 { margin: 2rem 0 .6rem; color: var(--ink); font: 700 1.15rem/1.35 var(--display); letter-spacing: -.03em; }
.prose h4 { margin: 1.6rem 0 .4rem; font: 700 1rem var(--display); }
.prose p { margin: 0 0 1.1rem; }
.prose ul, .prose ol { margin: 0 0 1.2rem; padding-left: 1.4rem; }
.prose li { margin: .3rem 0; }
.prose li::marker { color: var(--blue); }
.prose strong { color: var(--ink); }
.prose a { color: var(--blue); font-weight: 600; text-decoration: underline; text-underline-offset: 3px; text-decoration-color: #b9cfe6; }
.prose a:hover { text-decoration-color: var(--blue); }
.prose hr { margin: 2.4rem 0; border: 0; border-top: 1px solid var(--line); }
.prose hr + h2 { margin-top: 0; padding-top: 0; border-top: 0; }
.prose code { padding: .12em .38em; border-radius: 5px; background: #eef2f7; color: var(--navy); font: 500 .86em "JetBrains Mono", ui-monospace, Consolas, monospace; }
.prose pre { width: fit-content; min-width: min(100%, 36rem); margin: 1.3rem 0; padding: 1.05rem 1.2rem; overflow-x: auto; background: #f3f6fa; border: 1px solid var(--line); border-radius: 10px; font-size: .84rem; line-height: 1.65; }
.prose pre code { padding: 0; background: transparent; color: inherit; font-size: inherit; }
.prose pre code.hljs { padding: 0; background: transparent; }
.prose pre.mermaid { display: grid; place-items: center; background: var(--white); }
.table-wrap { margin: 1.4rem 0; overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; background: var(--white); }
.prose table { width: 100%; border-collapse: collapse; font-size: .86rem; line-height: 1.55; }
.prose th { padding: .65rem .9rem; background: #eef2f7; color: var(--ink); text-align: left; font: 800 .68rem var(--sans); letter-spacing: .09em; text-transform: uppercase; white-space: nowrap; }
.prose td { padding: .65rem .9rem; border-top: 1px solid var(--line); vertical-align: top; }
.prose td code, .prose th code { white-space: nowrap; }
.callout { margin: 1.4rem 0; padding: .9rem 1.2rem; border-left: 3px solid var(--blue); border-radius: 0 10px 10px 0; background: var(--blue-soft); }
.callout p { margin: 0; font-size: .93rem; line-height: 1.7; }
.callout p + p { margin-top: .6rem; }
.callout-warn { border-left-color: #c9a45a; background: #f7f0e1; }
.callout-tip { border-left-color: #6b9a86; background: #e8f1ec; }
.callout-note { border-left-color: #8a96a8; background: #eef1f5; }
.prose blockquote:not(.callout) { margin: 1.3rem 0; padding-left: 1.1rem; border-left: 3px solid var(--line); color: var(--ink-soft); }
.prose img { max-width: 100%; height: auto; border-radius: 10px; }
/* Desbordes en móvil: nada de texto largo o URLs debe generar scroll horizontal de página */
.prose { overflow-wrap: break-word; }
.prose :is(p, li, td, th, h1, h2, h3, h4, blockquote, .callout) { overflow-wrap: break-word; }
.prose a { overflow-wrap: anywhere; }
.prose code:not(pre code) { overflow-wrap: anywhere; }
.prose pre { max-width: 100%; box-sizing: border-box; }
.prose pre.mermaid { overflow-x: auto; }
.prose .katex-display, .prose svg, .prose video, .prose iframe { max-width: 100%; }
.prose :is(h2, h3, h4)[id] { scroll-margin-top: .75rem; }

/* Página de unidad */
.unit-main { min-width: 0; }
.list-title { margin: 2.6rem 0 1rem; font: 700 1.5rem var(--display); letter-spacing: -.045em; }
.topic-group { margin: 1.8rem 0 .2rem; color: var(--blue); font: 800 .68rem var(--sans); letter-spacing: .16em; text-transform: uppercase; }
.topic-list { border-top: 1px solid var(--line); }
.topic-list .topic-group + .topic { border-top: 0; }
.topic { display: grid; grid-template-columns: 58px minmax(0, 1fr) auto; gap: 1.1rem; padding: 1.35rem .4rem; border-bottom: 1px solid var(--line); transition: background .2s; }
.topic:hover { background: rgba(255,255,255,.7); }
.topic-num { color: var(--blue); font: 800 .85rem var(--display); padding-top: .2rem; }
.topic-main { display: grid; gap: .3rem; }
.topic-main b { font: 700 1.08rem var(--display); letter-spacing: -.03em; }
.topic-main > span { color: var(--ink-soft); font-size: .85rem; }
.chips { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .4rem; }
.chips span { padding: .22rem .5rem; border-radius: 5px; background: #f1f4f8; color: #5d6c80; font-size: .65rem; font-weight: 700; }
.topic-side { display: flex; align-items: flex-start; gap: .9rem; }
.topic-arrow { color: var(--blue); transition: transform .2s; }
.topic:hover .topic-arrow { transform: translate(3px, -3px); }
.unit-closing { margin-top: 3rem; }
.unit-main .large-copy { max-width: 680px; }

/* Navegación entre temas */
.tema-nav { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; padding-bottom: clamp(3.5rem, 7vw, 6rem); }
.tn-link { display: grid; gap: .25rem; padding: 1.1rem 1.25rem; background: var(--white); border: 1px solid var(--line); border-radius: 12px; transition: transform .2s, box-shadow .2s; }
.tn-link:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.tn-link b { font: 700 .95rem/1.35 var(--display); letter-spacing: -.02em; }
.tn-dir { color: var(--blue); font: 800 .64rem var(--sans); letter-spacing: .13em; text-transform: uppercase; }
.tn-up { text-align: center; }
.tn-next { text-align: right; }

@media (max-width: 960px) {
  .doc-layout { grid-template-columns: 1fr; }
  .doc-aside { position: static; order: -1; min-width: 0; }
  :root { --toc-offset: 124px; }
  .aside-card { min-width: 0; max-width: 100%; }
  .res-link span:first-child { min-width: 0; overflow-wrap: anywhere; }
}
@media (max-width: 700px) {
  .tema-nav { grid-template-columns: 1fr; }
  .tn-up, .tn-next { text-align: left; }
  .topic { grid-template-columns: 44px minmax(0, 1fr); }
  .topic-side { grid-column: 2; }
  .prose { font-size: .96rem; }
  .page-hero h1 { overflow-wrap: anywhere; hyphens: auto; }
  .tn-link b, .topic-main b { overflow-wrap: anywhere; }
}
@media (max-width: 480px) {
  .aside-card { padding: 1rem; }
  .prose pre { padding: .85rem .9rem; }
}

.prose code, .prose pre { font-variant-ligatures: none !important; font-feature-settings: "liga" 0, "calt" 0 !important; }