/* CUTD Help page — UI-only restyle to the Classical home theme (tokens from /ui/classical.css).
   Replaces cutd-web's /help.css on this page. Every class that help.js and tocbot toggle keeps its rule:
   .manual-skip-link, .manual-toc-toggle[hidden], .is-enhanced / .is-open, .is-active-link, .is-collapsible / .is-collapsed. */
/* Left-aligned from the same 24px gutter as the home page (Fable judges, 3/3); the text measure is capped, not the page. */
.help-page-content {
  --code-bg: #f3f6f8; --head-bg: #eef2f4;
  flex: 1 0 auto; width: 100%; max-width: 1680px; margin: 0; padding: 14px 24px 24px;
  background: #fff; color: var(--ink); font-family: var(--cutd-font-body);
}
.manual-skip-link { position: fixed; z-index: 10000001; top: -70px; left: 20px; padding: 8px 12px; background: #fff; color: var(--link); }
.manual-skip-link:focus { top: 6px; }
.help-page-content :is(a, button, summary):focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* Breadcrumb: a thin band like the home tool band */
.manual-breadcrumb { display: flex; flex-wrap: wrap; align-items: baseline; gap: 8px; margin: 0 0 16px; padding-bottom: 10px; border-bottom: 1px solid var(--rule); font-size: 13px; line-height: 1.5; color: var(--muted); }
.manual-breadcrumb a { color: var(--link); }
.manual-breadcrumb > span[aria-hidden="true"] { color: var(--faint); }
.manual-breadcrumb [aria-current="page"] { color: var(--ink); }

/* Contents | manual */
.manual-layout { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 0 24px; align-items: start; }
.manual-sidebar { position: sticky; top: 16px; min-width: 0; max-height: calc(100vh - 32px); overflow: auto; scrollbar-width: thin; scrollbar-gutter: stable; }
/* TOC on the home scale (UI review 2026-11-09): label 14px/600 and section heads 14px ink like the CUTD navigation,
   subsections 13.5px muted like the home catalog rows. About 700px tall, so it still fits the sticky box on a 760px-high screen. */
.manual-sidebar > span { display: block; margin: 2px 0 10px; padding-left: 10px; font-size: 14px; font-weight: 600; line-height: 1.5; color: var(--ink); }
.manual-toc-toggle { display: none; }
.manual-toc-toggle[hidden] { display: none; }
.manual-toc { font-size: 14px; line-height: 1.45; color: var(--muted); }
.manual-toc .toc-list { margin: 0; padding: 0; list-style: none; }
.manual-toc .toc-list .toc-list { padding-left: 12px; }
.manual-toc .toc-list .toc-list .toc-link { font-size: 13.5px; }
.manual-toc .toc-list-item { margin: 0; padding: 0; }
.manual-toc > .toc-list > .toc-list-item + .toc-list-item { margin-top: 6px; }
.manual-toc > .toc-list > .toc-list-item > .toc-link { color: var(--ink); }
.manual-toc .toc-link { display: block; padding: 4px 10px; border-radius: 2px; color: var(--muted); text-decoration: none; overflow-wrap: anywhere; }
.manual-toc .toc-link:hover { background: var(--hover); color: var(--ink); text-decoration: none; }
/* Active item: a teal bar and ink weight, no fill (colour round L3, mean 4.33 of 5) */
.manual-toc .is-active-link { box-shadow: inset 3px 0 0 var(--accent); color: var(--ink); font-weight: 600; }
/* Tocbot adds these classes to nested lists when collapseDepth is enabled. */
.manual-toc .is-collapsible { max-height: 1000px; overflow: hidden; transition: max-height .2s ease; }
.manual-toc .is-collapsed { max-height: 0; }

/* Manual text */
.manual-content { min-width: 0; padding-left: 28px; border-left: 1px solid var(--rule-soft); color: var(--ink); font-size: 14.5px; line-height: 1.65; overflow-wrap: anywhere; }
.manual-content > * { max-width: 760px; }
.manual-content :is(h1, h2, h3, h4, h5, h6) { color: var(--ink); font-family: var(--cutd-font-heading); line-height: 1.3; scroll-margin-top: 24px; }
.manual-content h1 { margin: 0 0 8px; font-size: 26px; font-weight: 700; }
.manual-content h2 { margin: 34px 0 12px; padding-bottom: 6px; border-bottom: 1px solid var(--rule); font-size: 19px; font-weight: 650; }
.manual-content h3 { margin: 24px 0 6px; font-size: 16px; font-weight: 650; }
.manual-content :is(h4, h5, h6) { margin: 18px 0 6px; font-size: 15px; font-weight: 650; }
.manual-content p { margin: 0 0 12px; }
.manual-content a { color: var(--link); text-decoration: none; }
.manual-content a:hover { text-decoration: underline; text-underline-offset: 2px; }
.manual-content strong { font-weight: 600; }
.manual-content :is(ul, ol) { margin: 0 0 14px; padding-left: 22px; }
.manual-content li { margin: 4px 0; padding-left: 2px; }
.manual-content li > :is(ul, ol) { margin-top: 4px; margin-bottom: 6px; }
.manual-content li > p { margin-bottom: 6px; }
.manual-content hr { height: 0; margin: 24px 0; border: 0; border-top: 1px solid var(--rule); }
.manual-content .manual-meta { display: flex; flex-wrap: wrap; gap: 4px 14px; margin: 0 0 6px; font-size: 13px; line-height: 1.5; color: var(--muted); }
/* Notice: like the home page's data notice, a teal bar and muted text, no fill */
.manual-content blockquote { margin: 14px 0 18px; padding: 2px 0 2px 12px; border-left: 3px solid var(--accent); color: var(--muted); }
.manual-content blockquote strong { color: var(--ink); }
.manual-content blockquote > :last-child { margin-bottom: 0; }
.manual-content code { padding: 1px 5px; border-radius: 2px; background: var(--code-bg); color: var(--ink); font: 13px/1.5 var(--mono); }
.manual-content pre { max-width: min(760px, 100%); margin: 14px 0 18px; padding: 12px 14px; overflow-x: auto; border: 1px solid var(--rule-soft); border-radius: 2px; background: var(--code-bg); font: 13px/1.6 var(--mono); tab-size: 2; }
.manual-content pre code { padding: 0; border-radius: 0; background: transparent; font: inherit; white-space: pre; overflow-wrap: normal; }
/* Tables: home catalog style. The frame sits on the cells, because the block wrapper (needed for narrow screens) is wider than the table. */
.manual-content table { display: block; width: 100%; max-width: min(760px, 100%); margin: 14px 0 18px; overflow-x: auto; border-collapse: collapse; border-spacing: 0; font-size: 13.5px; line-height: 1.5; }
.manual-content :is(th, td) { min-width: 96px; padding: 5px 10px; border-bottom: 1px solid var(--rule-soft); text-align: left; vertical-align: top; }
.manual-content th { border-top: 1px solid var(--rule); border-bottom-color: var(--rule); background: var(--head-bg); font-size: 12.5px; font-weight: 600; color: var(--muted); }
.manual-content tr > :first-child { border-left: 1px solid var(--rule); }
.manual-content tr > :last-child { border-right: 1px solid var(--rule); }
.manual-content tbody tr:last-child > * { border-bottom-color: var(--rule); }
.manual-content img { display: block; max-width: 100%; height: auto; margin: 22px auto;border: 1px solid var(--rule); border-radius: 2px; }
.manual-content a:has(> img) { display: block; }
.manual-image-link { cursor: zoom-in; }
.manual-content :is(figure, .manual-figure) { margin: 20px 0; }
.manual-content :is(figure, .manual-figure) img { margin-block: 0; }
.manual-content :is(figcaption, .manual-figure-caption) { margin: 0; padding-top: 8px; font-size: 12.5px; line-height: 1.55; color: var(--muted); }
.manual-content details { margin: 14px 0; padding: 10px 14px; border: 1px solid var(--rule); border-radius: 2px; }
.manual-content summary { font-weight: 600; color: var(--ink); cursor: pointer; }
.manual-content details[open] > summary { margin-bottom: 10px; }
.manual-content details > :last-child { margin-bottom: 0; }
.manual-top-link { display: inline-block; margin-top: 24px; font-size: 14px; color: var(--link); }

/* Screenshot preview is in the top layer; it does not replace or navigate away from the manual. */
.manual-lightbox { box-sizing: border-box; width: max-content; max-width: calc(100vw - 48px); max-height: calc(100dvh - 48px); margin: auto; padding: 0; overflow: hidden; border: 1px solid var(--rule, #c9d2d8); border-radius: 6px; background: #fff; color: var(--ink, #25323a); box-shadow: 0 16px 70px #0005; font-family: var(--cutd-font-body, sans-serif); }
.manual-lightbox[open] { display: flex; flex-direction: column; }
.manual-lightbox::backdrop { background: #14242db8; }
.manual-lightbox-heading { display: flex; flex: 0 0 auto; align-items: center; justify-content: space-between; gap: 24px; padding: 10px 14px; border-bottom: 1px solid var(--rule-soft, #e1e6e9); }
.manual-lightbox-heading h2 { margin: 0; font: 600 15px/1.4 var(--cutd-font-heading, sans-serif); }
.manual-lightbox-actions { display: flex; align-items: center; gap: 12px; }
.manual-lightbox button { border: 0; border-radius: 3px; background: transparent; color: var(--link, #28667a); cursor: pointer; font: 13px/1.4 var(--cutd-font-body, sans-serif); }
.manual-lightbox button:hover { background: var(--hover, #edf4f6); }
.manual-lightbox .manual-lightbox-close { width: 32px; height: 32px; padding: 0; font-size: 26px; line-height: 1; color: var(--ink, #25323a); }
.manual-lightbox :is(button, .manual-lightbox-stage):focus-visible { outline: 2px solid var(--accent, #287488); outline-offset: -2px; }
.manual-lightbox-stage { min-width: 0; min-height: 0; overflow: auto; overscroll-behavior: contain; background: #fff; }
.manual-lightbox-stage img { display: block; width: auto; height: auto; max-width: calc(100vw - 50px); max-height: calc(100dvh - 168px); margin: 0 auto; object-fit: contain; }
.manual-lightbox.is-zoomed { width: calc(100vw - 48px); }
.manual-lightbox.is-zoomed .manual-lightbox-stage img { max-width: none; max-height: none; margin: 0; }
.manual-lightbox-caption { flex: 0 0 auto; max-width: min(960px, calc(100vw - 80px)); margin: 0; padding: 10px 14px; border-top: 1px solid var(--rule-soft, #e1e6e9); font-size: 13px; line-height: 1.5; }
@media (max-width: 760px) {
  .manual-lightbox { max-width: calc(100vw - 20px); max-height: calc(100dvh - 20px); }
  .manual-lightbox-heading { gap: 12px; padding: 8px 10px; }
  .manual-lightbox-stage img { max-width: calc(100vw - 22px); max-height: calc(100dvh - 164px); }
  .manual-lightbox.is-zoomed { width: calc(100vw - 20px); }
  .manual-lightbox-caption { max-width: calc(100vw - 44px); padding: 8px 10px; font-size: 12px; }
}

/* Stacked layout from 900px down (tablets too); help.js uses the same 900px query.
   One rule under the header on phones, as on the home page: the breadcrumb loses its own rule. */
@media (max-width: 900px) {
  .manual-breadcrumb { margin-bottom: 12px; padding-bottom: 0; border-bottom: 0; }
  .manual-layout { display: block; }
  .manual-sidebar { position: static; max-height: none; margin-bottom: 18px; padding: 0 0 14px; border-bottom: 1px solid var(--rule); overflow: visible; }
  .manual-sidebar > span { display: none; }
  .manual-toc-toggle { display: flex; align-items: center; justify-content: space-between; gap: 10px; width: 100%; min-height: 36px; padding: 6px 10px; border: 1px solid var(--line); border-radius: 2px; background: #fff; color: var(--ink); font: 600 14px/1.4 var(--cutd-font-body); text-align: left; cursor: pointer; }
  .manual-toc-toggle:hover, .manual-toc-toggle[aria-expanded="true"] { background: var(--hover); }
  .manual-toc-toggle svg { display: block; flex: 0 0 16px; width: 16px; height: 16px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
  .manual-toc-toggle[aria-expanded="true"] svg { transform: rotate(180deg); }
  .manual-sidebar.is-enhanced:not(.is-open) .manual-toc { display: none; }
  .manual-sidebar.is-open .manual-toc { display: block; padding-top: 8px; }   /* full length; the page scrolls, no inner scroll box */
  .manual-toc .toc-link { padding: 8px 10px; }                                /* ~36px touch rows, as tall as the toggle */
  .manual-toc .toc-list .toc-list .toc-link { font-size: 14px; }
  .manual-content { padding-left: 0; border-left: 0; }
  .manual-content h2 { margin-top: 28px; font-size: 18px; }
}
/* phones: same gutters as the home page (classical.css, <=760px) */
@media (max-width: 760px) { .help-page-content { padding: 12px 16px 16px; } }

@media (prefers-reduced-motion: reduce) {
  .manual-toc .is-collapsible { transition: none; }
  .help-page-content *, .help-page-content { scroll-behavior: auto !important; }
}