/* viewer.css: the knowledge base viewer in the Carbon Launcher's look (docs/launcher-skin.md): the kit's tokens
   (carbon/carbon-tokens.css, the launcher's export, loaded first) and the shared pieces (carbon.css) do the colours
   and the type; this file lays out the three columns as GitBook had them, the index on the left, the page, and
   "On this page" on the right, and names only --carbon-* tokens, never a colour. On a narrow screen the index folds
   behind the Menu button and "On this page" moves above the page. Inter is the one face, for code too (David,
   2026-10-10), kept in kb-site/vendor/fonts-2 with its licence; the horizontal Carbon logo is the vendored one.
   Nothing is loaded from anywhere else, and nothing here depends on inline styles: the page's rules forbid them. */
@font-face { font-family: 'Inter'; font-style: normal; font-weight: 100 900; font-display: swap; src: url('fonts-2/inter.woff2') format('woff2'); }
@font-face { font-family: 'Inter'; font-style: italic; font-weight: 100 900; font-display: swap; src: url('fonts-2/inter-italic.woff2') format('woff2'); }

:root {
  --side-w: 272px;
  --otp-w: 232px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

body { font-size: 15px; line-height: 1.65; }
.backdrop { display: none; }                               /* the launcher is flat: no glow behind the page */
a { text-decoration: none; }

/* ---- the three columns ------------------------------------------------------------------------------------------ */
.shell { display: grid; grid-template-columns: var(--side-w) minmax(0, 1fr) var(--otp-w); min-height: 100vh; }
body:not(.has-otp) .shell { grid-template-columns: var(--side-w) minmax(0, 1fr); }
body:not(.has-otp) .otp { display: none; }

/* left: the index, in the launcher's nav colour */
.side { position: sticky; top: 0; height: 100vh; overflow-y: auto; overscroll-behavior: contain; padding: 18px 0 32px;
  background: var(--carbon-nav); border-right: 1px solid var(--carbon-stroke);
  scrollbar-width: thin; scrollbar-color: var(--carbon-stroke-strong) transparent; }
.side-brand { display: block; padding: 2px 20px 16px; border-bottom: 1px solid var(--carbon-stroke); }
.side-brand img { display: block; height: 22px; width: auto; }
.side-title { display: block; margin: 16px 20px 10px; font-size: 14px; font-weight: 600; color: var(--carbon-text); }
.side-title:hover { color: var(--carbon-accent-hover); }
.side-note { margin: 8px 20px; font-size: 13px; color: var(--carbon-text-3); }

.kb-index { padding: 0 10px; }
.kb-index details > summary { list-style: none; cursor: pointer; }
.kb-index details > summary::-webkit-details-marker { display: none; }
.kb-group { margin: 0 0 4px; }
.kb-group > summary { display: flex; align-items: center; gap: 8px; padding: 7px 10px; border-radius: var(--carbon-radius-sm);
  font-size: 12px; font-weight: 600; color: var(--carbon-text-2); transition: background 0.1s ease, color 0.1s ease; }
.kb-group > summary::before { content: "▸"; display: inline-block; width: 10px; font-size: 10px; color: var(--carbon-text-3); transition: transform 0.15s ease; }
.kb-group[open] > summary::before { transform: rotate(90deg); color: var(--carbon-accent); }
.kb-group > summary:hover { background: var(--carbon-hover); color: var(--carbon-text); }
.kb-group-body { padding: 2px 0 6px 10px; }

.kb-item, .kb-sub-link { display: block; padding: 6px 10px; font-size: 13px; line-height: 1.4; color: var(--carbon-text-2);
  border-radius: var(--carbon-radius-sm); border-left: 2px solid transparent; transition: background 0.12s ease, color 0.12s ease, border-color 0.12s ease; }
.kb-item { margin-left: 18px; }
.kb-item:hover, .kb-sub-link:hover { background: var(--carbon-hover); color: var(--carbon-text); }
.kb-item.is-active, .kb-sub-link.is-active { background: var(--carbon-accent-soft); color: var(--carbon-accent); border-left-color: var(--carbon-accent); }

.kb-sub { margin: 0; }
.kb-sub > summary { display: flex; align-items: center; }
.kb-sub > summary::before { content: "▸"; flex: 0 0 18px; text-align: center; font-size: 10px; color: var(--carbon-text-3); transition: transform 0.15s ease; }
.kb-sub[open] > summary::before { transform: rotate(90deg); color: var(--carbon-accent); }
.kb-sub-link { flex: 1; min-width: 0; }
.kb-sub-body { margin-left: 18px; padding-left: 0; border-left: 1px solid var(--carbon-stroke); }
.kb-sub-body .kb-item { margin-left: 8px; }
.kb-sub-body .kb-sub > summary::before { flex-basis: 14px; }

/* middle: the page */
.main { min-width: 0; padding: 0 48px 96px; }
.loading { color: var(--carbon-text-3); padding-top: 48px; }
.crumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 8px; max-width: 760px; padding: 20px 0 14px; margin: 0 0 26px;
  border-bottom: 1px solid var(--carbon-stroke); font-size: 12.5px; color: var(--carbon-text-2); }
.crumbs a { color: var(--carbon-text-2); }
.crumbs a:hover { color: var(--carbon-accent-hover); }
.crumbs .sep { color: var(--carbon-text-3); }
.crumbs .current { color: var(--carbon-text); font-weight: 500; }

.md { max-width: 760px; overflow-wrap: anywhere; }
.md.home { max-width: 1040px; padding-top: 36px; }
.md h1, .md h2, .md h3, .md h4, .md h5, .md h6 { line-height: 1.3; letter-spacing: -0.01em; color: var(--carbon-text); scroll-margin-top: 24px; }
.md h1 { font-size: 28px; font-weight: 600; margin: 0 0 16px; }
.md h2 { font-size: 20px; font-weight: 600; margin: 40px 0 12px; }
.md h3 { font-size: 16px; font-weight: 600; margin: 30px 0 10px; }
.md h4, .md h5, .md h6 { font-size: 15px; font-weight: 600; margin: 22px 0 8px; }
.md > :first-child { margin-top: 0; }
.md p, .md ul, .md ol, .md blockquote, .md table, .md pre, .md figure, .md details { margin: 0 0 16px; }
.md p, .md li { color: var(--carbon-text); }
.md a { color: var(--carbon-accent); border-bottom: 1px solid var(--carbon-accent-soft-2); }
.md a:hover { color: var(--carbon-accent-hover); border-bottom-color: currentColor; }
.md ul, .md ol { padding-left: 22px; }
.md li + li { margin-top: 4px; }
.md li::marker { color: var(--carbon-text-3); }
.md strong { font-weight: 600; }
.md code { font-size: 0.9em; }
.md pre { padding: 14px 16px; border-radius: var(--carbon-radius-sm); }
.md pre code { font-size: 13px; line-height: 1.6; font-variant-numeric: var(--carbon-mono-numeric); }
.md blockquote { padding: 2px 0 2px 14px; }
.md table { width: 100%; font-size: 14px; }
.md th, .md td { padding: 8px 12px; }
.md th { background: var(--carbon-layer-alt); }
.md img, .md .md-img { max-width: 100%; height: auto; border-radius: var(--carbon-radius-sm); border: 1px solid var(--carbon-stroke); }
.md figure { margin-left: 0; margin-right: 0; }
.md figcaption { font-size: 13px; color: var(--carbon-text-2); margin-top: 6px; }
.md details { border: 1px solid var(--carbon-stroke); border-radius: var(--carbon-radius-sm); padding: 10px 14px; background: var(--carbon-layer); }
.md summary { cursor: pointer; font-weight: 500; }
.md hr { margin: 36px 0; }
.md .md-hint { border: 1px solid var(--carbon-info-stroke); border-left: 3px solid var(--carbon-accent); background: var(--carbon-info-bg); border-radius: var(--carbon-radius-sm); padding: 12px 16px; margin: 0 0 16px; }
.md .md-hint-warning { border-color: var(--carbon-warn-stroke); border-left-color: var(--carbon-warm); background: var(--carbon-warn-bg); }
.md .md-hint-danger { border-color: color-mix(in srgb, var(--carbon-danger) 35%, transparent); border-left-color: var(--carbon-danger); background: color-mix(in srgb, var(--carbon-danger) 8%, transparent); }
.md .md-hint-success { border-color: color-mix(in srgb, var(--carbon-ok) 35%, transparent); border-left-color: var(--carbon-ok); background: color-mix(in srgb, var(--carbon-ok) 8%, transparent); }
.md .md-hint > :last-child { margin-bottom: 0; }
.md .md-kb-cols { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(0, 1fr); gap: 20px; }
.md .md-kb-col { min-width: 0; }

/* GitBook's cards in a page (the Welcome page's two): the launcher's cards */
.md .kb-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; margin: 8px 0 20px; }
.md .kb-card { position: relative; display: flex; flex-direction: column; gap: 6px; min-height: 104px; padding: 18px 20px 16px;
  background: var(--carbon-layer); border: 1px solid var(--carbon-stroke); border-radius: var(--carbon-radius); box-shadow: var(--carbon-shadow-card);
  transition: border-color 0.18s ease, background 0.18s ease, transform 0.18s ease; }
.md a.kb-card { border-bottom: 1px solid var(--carbon-stroke); }
.md a.kb-card:hover { border-color: var(--carbon-accent-soft-2); background: var(--carbon-layer-alt); transform: translateY(-2px); }
.md .kb-card-title { font-size: 16px; font-weight: 600; color: var(--carbon-text); padding-right: 24px; }
.md .kb-card-desc { font-size: 13.5px; line-height: 1.5; color: var(--carbon-text-2); }
.md .kb-card-go { position: absolute; right: 18px; top: 16px; color: var(--carbon-accent); }
@media (prefers-reduced-motion: reduce) { .md a.kb-card:hover { transform: none; } }

/* the contents (/ without a Welcome page): a card per top section */
.home-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; margin-top: 8px; align-items: start; }
.home-card { padding: 18px 20px 16px; background: var(--carbon-layer); border: 1px solid var(--carbon-stroke); border-radius: var(--carbon-radius); box-shadow: var(--carbon-shadow-card); min-width: 0; }
.md .home-card-title { margin: 0 0 10px; font-size: 13px; font-weight: 600; color: var(--carbon-text); }
.md .home-card-title a { border-bottom: 0; color: var(--carbon-text); }
.md .home-card-title a:hover { color: var(--carbon-accent-hover); }
.toc, .toc ul { list-style: none; padding-left: 0; margin: 0; }
.toc ul { padding-left: 14px; margin: 6px 0 2px; border-left: 1px solid var(--carbon-stroke); }
.toc li { margin: 0 0 8px; }
.md .toc a { border-bottom: 0; font-weight: 500; }
.toc-desc { display: block; font-size: 13px; line-height: 1.5; color: var(--carbon-text-2); margin: 2px 0 0; }

/* below the page: previous and next, then the Markdown */
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; max-width: 760px; margin: 52px 0 0; }
.pager-card { display: flex; flex-direction: column; gap: 4px; padding: 14px 18px; border: 1px solid var(--carbon-stroke); border-radius: var(--carbon-radius);
  background: var(--carbon-layer); transition: border-color 0.15s ease, background 0.15s ease; min-width: 0; }
.pager-card:hover { border-color: var(--carbon-accent-soft-2); background: var(--carbon-layer-alt); }
.pager-next { text-align: right; grid-column: 2; }
.pager-dir { font-size: 12px; color: var(--carbon-text-2); }
.pager-title { font-size: 15px; font-weight: 500; color: var(--carbon-text); overflow-wrap: anywhere; }
.md-source { max-width: 760px; margin: 28px 0 0; padding-top: 14px; border-top: 1px solid var(--carbon-stroke); font-size: 13px; }
.md-source a { color: var(--carbon-text-2); }
.md-source a:hover { color: var(--carbon-accent-hover); }

/* right: On this page */
.otp { position: sticky; top: 0; height: 100vh; overflow-y: auto; padding: 66px 20px 32px 4px; scrollbar-width: thin; }
.otp-label { margin: 0 0 10px; font-size: 12px; font-weight: 600; color: var(--carbon-text-2); }
.otp-list { list-style: none; margin: 0; padding: 0; }
.otp-list a { display: block; padding: 4px 0 4px 12px; font-size: 13px; line-height: 1.45; color: var(--carbon-text-2);
  border-left: 2px solid var(--carbon-stroke); transition: color 0.12s ease, border-color 0.12s ease; }
.otp-list .otp-h3 a { padding-left: 24px; font-size: 12.5px; }
.otp-list a:hover { color: var(--carbon-text); }
.otp-list a.is-active { color: var(--carbon-accent); border-left-color: var(--carbon-accent); }
.otp-inline { display: none; }

/* ---- narrow screens ---------------------------------------------------------------------------------------------- */
.topbar, .scrim { display: none; }

@media (max-width: 1199px) {
  .shell, body:not(.has-otp) .shell { grid-template-columns: var(--side-w) minmax(0, 1fr); }
  .otp { display: none; }
  .md .otp-inline { display: block; margin: 0 0 24px; padding: 0; border: 1px solid var(--carbon-stroke); border-radius: var(--carbon-radius-sm); background: var(--carbon-layer); }
  .md .otp-inline > summary { padding: 10px 14px; font-size: 12px; font-weight: 600; color: var(--carbon-text-2); }
  .md .otp-inline > .otp-list { padding: 0 14px 12px; }
  .md .otp-inline a { border-bottom: 0; }
}

@media (max-width: 899px) {
  .topbar { display: flex; position: sticky; top: 0; z-index: 20; height: 52px; align-items: center; justify-content: space-between; gap: 12px;
    padding: 0 16px; background: var(--carbon-nav); border-bottom: 1px solid var(--carbon-stroke); }
  .topbar-brand img { display: block; height: 20px; width: auto; }
  .menu-btn { appearance: none; min-height: var(--carbon-control-height); padding: var(--carbon-button-padding); border: 1px solid var(--carbon-stroke);
    background: var(--carbon-hover); color: var(--carbon-text); border-radius: var(--carbon-radius-sm); font: inherit; font-size: 13px; font-weight: 500; cursor: pointer; }
  .menu-btn:hover { background: var(--carbon-pressed); border-color: var(--carbon-stroke-strong); }
  .shell, body:not(.has-otp) .shell { display: block; }
  .side { position: fixed; top: 0; left: 0; bottom: 0; z-index: 30; width: min(86vw, 320px); height: auto;
    transform: translateX(-100%); visibility: hidden; transition: transform 0.22s var(--ease), visibility 0s linear 0.22s; }
  body.menu-open .side { transform: none; visibility: visible; transition: transform 0.22s var(--ease); }
  body.menu-open { overflow: hidden; }
  .scrim:not([hidden]) { display: block; position: fixed; inset: 0; z-index: 25; background: var(--carbon-shadow); }
  .main { padding: 0 16px 64px; }
  .crumbs { padding-top: 16px; margin-bottom: 22px; }
  .md h1 { font-size: 24px; }
  .md h2 { font-size: 18px; }
  .md h1, .md h2, .md h3, .md h4, .md h5, .md h6 { scroll-margin-top: 68px; }
  .md.home { padding-top: 24px; }
  .md .md-kb-cols { grid-auto-flow: row; }
  .pager { grid-template-columns: 1fr; }
  .pager-next { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
  .side, body.menu-open .side, .kb-group > summary::before, .kb-sub > summary::before { transition: none; }
}

.noscript { max-width: 760px; margin: 48px auto; padding: 0 16px; color: var(--carbon-text-2); }