/*
 * mdlib-pure site. Rendered Markdown uses the library's theme.css (`.md`);
 * this file themes it through its --md-* tokens and styles the chrome.
 *
 * Direction: a typesetter's proof. Computer Modern (the KaTeX_Main fonts
 * shipped by KaTeX, already a dev dependency) for display type; the system
 * sans for reading; Markdown markers (#, ##) hang in the margin in
 * non-repro blue, the colour of guides that never print.
 */

@font-face { font-family: 'mdl-serif'; src: url('katex/fonts/KaTeX_Main-Regular.woff2') format('woff2'); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: 'mdl-serif'; src: url('katex/fonts/KaTeX_Main-Italic.woff2') format('woff2'); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: 'mdl-serif'; src: url('katex/fonts/KaTeX_Main-Bold.woff2') format('woff2'); font-weight: 700; font-style: normal; font-display: swap; }

:root {
  color-scheme: light dark;
  &:has(> head > meta[name='color-scheme'][content='light']) { color-scheme: light; }
  &:has(> head > meta[name='color-scheme'][content='dark']) { color-scheme: dark; }

  /* Site tokens */
  --paper: light-dark(#f6f8f9, #15181d);
  --raised: light-dark(#ffffff, #1b1f25);
  --ink: light-dark(#1a1e23, #e3e7eb);
  --guide: light-dark(#3f7f9f, #6aa7c6);
  --guide-soft: light-dark(#d3e8f1, #1f3845);
  --font-ui: system-ui, -apple-system, 'Segoe UI', Roboto, Ubuntu, Cantarell, 'Noto Sans', sans-serif;
  --font-display: 'mdl-serif', 'Latin Modern Roman', 'CMU Serif', Georgia, serif;
  --measure: 44rem;
  --wide: 78rem;
  --gutter: clamp(1rem, 4vw, 2.75rem);
  --bar-h: 3.25rem;

  /* The library's tokens, themed for the site */
  --md-color-link: light-dark(#1d43c4, #9db3ff);
  --md-color-link-hover: light-dark(#102c8c, #c6d2ff);
  --md-font-heading: var(--font-display);
  --md-leading: 1.65;

  scroll-padding-block-start: calc(var(--bar-h) + 1rem);
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: no-preference) {
  :root { scroll-behavior: smooth; }
}

*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 1.0625rem/1.6 var(--font-ui);
  text-rendering: optimizeLegibility;
}

::selection { background: var(--guide-soft); }

:focus-visible {
  outline: 2px solid var(--md-color-link);
  outline-offset: 2px;
}

a { color: var(--md-color-link); text-underline-offset: 0.15em; }
a:hover { color: var(--md-color-link-hover); }

code, kbd, pre, samp { font-family: var(--md-font-mono); }

img { max-inline-size: 100%; block-size: auto; }

.visually-hidden {
  position: absolute !important;
  inline-size: 1px; block-size: 1px;
  overflow: hidden; clip-path: inset(50%); white-space: nowrap;
}

.skip {
  position: absolute; z-index: 10; inset-inline-start: 0.5rem; inset-block-start: -4rem;
  padding: 0.5rem 0.75rem; background: var(--raised); color: var(--ink);
  border: 1px solid var(--md-color-border); border-radius: 4px;
  &:focus { inset-block-start: 0.5rem; }
}

html:not(.js) .js-only { display: none !important; }

/* --- Top bar (the demo editor's bar, kept on every page) ------------------ */

.bar {
  position: sticky; inset-block-start: 0; z-index: 5;
  display: flex; align-items: center; gap: 1rem;
  block-size: var(--bar-h);
  padding-inline: 1rem;
  background: var(--paper);
  border-block-end: 1px solid var(--md-color-border);
  font-size: 0.9375rem;
}

.brand {
  display: inline-flex; align-items: baseline; gap: 0.3em;
  color: inherit; font-weight: 700; font-size: 1rem; text-decoration: none;
  white-space: nowrap;
  & .mk { color: var(--guide); font-family: var(--md-font-mono); font-weight: 400; }
}

.site-nav {
  & ul { display: flex; gap: 0.25rem; margin: 0; padding: 0; list-style: none; }
  & a {
    display: block; padding: 0.35rem 0.6rem; border-radius: 4px;
    color: inherit; text-decoration: none;
    &:hover { background: var(--md-color-surface); color: inherit; }
    &[aria-current] { box-shadow: inset 0 -2px var(--guide); border-radius: 0; }
  }
}

.bar-end { display: flex; align-items: center; gap: 0.75rem; margin-inline-start: auto; }

.scheme {
  display: inline-flex; align-items: center; gap: 0.4rem; font-size: 0.875rem;
}

/* The embedded podcast application owns its controls and typography. */
select:not(:where(.podcast *)), .btn, button:not(:where(.podcast *)) {
  font: inherit; color: inherit;
}

select {
  padding: 0.2rem 0.4rem;
  background: var(--raised);
  border: 1px solid var(--md-color-border);
  border-radius: 4px;
}

.menu-btn { display: none; }

@media (width < 62rem) {
  .menu-btn {
    display: inline-flex; align-items: center; gap: 0.4rem;
    padding: 0.3rem 0.6rem; background: transparent;
    border: 1px solid var(--md-color-border); border-radius: 4px; cursor: pointer;
  }
  .site-nav[popover] {
    position: fixed; inset: var(--bar-h) 0 auto auto; margin: 0;
    inline-size: min(20rem, 100vw); max-block-size: calc(100dvh - var(--bar-h));
    padding: 0.75rem; overflow: auto;
    background: var(--paper); color: var(--ink);
    border: 1px solid var(--md-color-border); border-block-start: 0;
    & ul { flex-direction: column; }
    & a { padding: 0.6rem 0.75rem; }
    & a[aria-current] { box-shadow: inset 2px 0 var(--guide); }
  }
  .site-nav::backdrop { background: color-mix(in oklab, black 25%, transparent); }
}

@media (width >= 62rem) {
  .site-nav[popover] {
    display: block; position: static; inset: auto; margin: 0; padding: 0;
    inline-size: auto; block-size: auto; overflow: visible;
    background: none; color: inherit; border: 0;
  }
}

/* --- Layout ---------------------------------------------------------------- */

.wrap {
  inline-size: 100%;
  max-inline-size: var(--wide);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

main { display: block; }

.section { padding-block: clamp(2.5rem, 6vw, 4.5rem); border-block-start: 1px solid var(--md-color-border); }

/* Headings of the chrome: display face, Markdown marker hanging in the margin */
.title {
  position: relative;
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.1;
  text-wrap: balance;
}

h2.title { font-size: clamp(1.75rem, 1.3rem + 1.6vw, 2.5rem); }
h3.title { font-size: 1.5rem; }

.mk {
  color: var(--guide);
  font-family: var(--md-font-mono);
  font-weight: 400;
  font-style: normal;
}

.title > .mk {
  position: absolute; inset-inline-end: 100%;
  padding-inline-end: 0.45em;
  font-size: 0.62em;
  line-height: 1.75;
}

@media (width < 84rem) {
  .title > .mk, .hero h1 > .mk { position: static; padding-inline-end: 0.35em; line-height: 1; }
}

.lede { max-inline-size: 38rem; font-size: 1.1875rem; line-height: 1.55; text-wrap: pretty; }
:is(.lede, .config) code { padding: 0.1em 0.35em; border-radius: 3px; background: var(--md-color-code-bg); font-size: 0.875em; }
.title code { font-size: 0.82em; letter-spacing: -0.02em; }
.prose { max-inline-size: var(--measure); }
.prose p { text-wrap: pretty; }
.muted { color: var(--md-color-muted); }

/* Buttons and the install line */
.btn {
  display: inline-flex; align-items: center; gap: 0.4em;
  padding: 0.6rem 1rem;
  border: 1px solid var(--md-color-border); border-radius: 4px;
  background: var(--raised); color: var(--ink);
  font-weight: 600; text-decoration: none; cursor: pointer;
  &:hover { border-color: var(--guide); color: var(--ink); }
}

.btn-primary {
  background: var(--md-color-link); border-color: var(--md-color-link); color: var(--paper);
  &:hover { background: var(--md-color-link-hover); border-color: var(--md-color-link-hover); color: var(--paper); }
}

.install-note { margin: 0.6rem 0 0; font-size: 0.875rem; }

.actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 1.5rem 0 0; padding: 0; }

.install {
  display: inline-flex; align-items: stretch; max-inline-size: 100%;
  margin-block-start: 1.75rem;
  border: 1px solid var(--md-color-border); border-radius: 4px; background: var(--raised);
  /* Long commands (a tarball URL) wrap at the <wbr> after each slash. */
  & code { padding: 0.55rem 0.9rem; font-size: 0.9375rem; overflow-wrap: anywhere; }
  & code::before { content: '$ ' / ''; color: var(--md-color-muted); }
  & button { border: 0; border-inline-start: 1px solid var(--md-color-border); background: transparent; padding-inline: 0.85rem; cursor: pointer; font-size: 0.875rem; }
  & button:hover { background: var(--md-color-surface); }
}

/* --- Source / output pairs (the seam) --------------------------------------- */

.pair {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  border: 1px solid var(--md-color-border);
  border-radius: var(--md-radius);
  background: var(--raised);
  overflow: hidden;
}

.pane { min-inline-size: 0; display: flex; flex-direction: column; }

.pane-src {
  background: var(--md-color-surface);
  border-inline-end: 1px solid var(--guide);
}

.pane-label {
  margin: 0; padding: 0.45rem 1rem;
  border-block-end: 1px solid var(--md-color-border);
  color: var(--md-color-muted); font-size: 0.8125rem;
}

.pane-src pre {
  flex: 1; margin: 0; padding: 1rem;
  font-size: 0.8125rem; line-height: 1.55;
  overflow-x: auto; white-space: pre;
  background: none; border-radius: 0;
}

.pane-out { padding: 1.25rem 1.5rem; }

@media (width < 52rem) {
  .pair { grid-template-columns: minmax(0, 1fr); }
  .pane-src { border-inline-end: 0; border-block-end: 1px solid var(--guide); }
}

/* Source above the output, at every width (the Web Components sample) */
.pair-stack {
  grid-template-columns: minmax(0, 1fr);
  & > .pane-src { border-inline-end: 0; border-block-end: 1px solid var(--guide); }
}

/* --- Home ------------------------------------------------------------------- */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
  padding-block: clamp(2.5rem, 7vw, 5.5rem);
}

.hero h1 {
  margin: 0 0 1.25rem;
  font-size: clamp(2.6rem, 1.4rem + 5vw, 4.75rem);
  line-height: 1.02;
  letter-spacing: -0.01em;
}

.hero h1 > .mk { line-height: 2.1; }

.live {
  margin: 0;
  & .pair { grid-template-columns: minmax(0, 1fr); }
  & textarea {
    display: block; inline-size: 100%; min-block-size: 15.5rem; margin: 0; padding: 1rem;
    border: 0; resize: vertical; background: transparent; color: inherit;
    font: 0.8125rem/1.55 var(--md-font-mono);
    &:focus-visible { outline-offset: -2px; }
  }
  & .pane-src { border-inline-end: 0; border-block-end: 1px solid var(--guide); }
  & .pane-out { min-block-size: 12rem; }
  & figcaption { margin-block-start: 0.6rem; font-size: 0.875rem; color: var(--md-color-muted); }
}

@media (width < 60rem) {
  .hero { grid-template-columns: minmax(0, 1fr); }
}

/* Datasheet: a definition list rendered by the deflist plugin */
.datasheet dl {
  display: grid;
  grid-template-columns: minmax(10rem, 1fr) minmax(0, 2.2fr);
  margin: 0;
  border-block-end: 1px solid var(--md-color-border);
  & dt, & dd { margin: 0; padding: 0.85rem 0; border-block-start: 1px solid var(--md-color-border); }
  & dt { padding-inline-end: 1.5rem; font-weight: 600; }
  & dd { font-variant-numeric: tabular-nums; }
  & dd + dt { margin: 0; }
}

@media (width < 40rem) {
  .datasheet dl { grid-template-columns: minmax(0, 1fr); }
  .datasheet dl dd { padding-block-start: 0; border-block-start: 0; }
}

/* Ways to use it: title, text, code and links aligned across columns (subgrid) */
.uses {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 clamp(1.5rem, 4vw, 3.5rem);
  margin-block-start: 1.75rem;
}
.use {
  display: grid; grid-row: span 4; grid-template-rows: subgrid; grid-template-columns: minmax(0, 1fr); gap: 0; align-content: start;
  min-inline-size: 0;
  padding-block: 1rem 2.5rem; border-block-start: 1px solid var(--md-color-border);
  & > .title { margin-block-end: 0.6rem; }
  & pre { margin-block-end: 0.75rem; font-size: 0.8125rem; }
}
.use-links { margin: 0; font-size: 0.9375rem; }

@media (width < 56rem) { .uses { grid-template-columns: minmax(0, 1fr); } }

.split {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: start;
}

@media (width < 56rem) { .split { grid-template-columns: minmax(0, 1fr); } }

.table-wrap { overflow-x: auto; }
.md table { min-inline-size: 100%; }
.num-table td:not(:first-child), .num-table th:not(:first-child) { text-align: end; }
.num-last :is(td, th):last-child { white-space: nowrap; }

/* --- Rendered Markdown, site additions ------------------------------------- */

.md:not(:where(.podcast *)) {
  & h1, & h2 { font-weight: 400; }
  & h1 { font-size: clamp(2.1rem, 1.6rem + 2vw, 2.75rem); line-height: 1.1; }
  & h3, & h4, & h5, & h6 { font-family: var(--font-ui); font-weight: 650; }
  & pre { border: 1px solid var(--md-color-border); }
  & table { display: block; overflow-x: auto; max-inline-size: 100%; }
  & th:not([align]) { text-align: start; }
  & td:first-child > code, & th:first-child > code, & td > a > code { white-space: nowrap; }
  & .wrap-pre { white-space: pre-wrap; overflow-wrap: anywhere; }
  & .markdown-alert { background: color-mix(in oklab, var(--md-alert) 7%, transparent); border-radius: 0 var(--md-radius) var(--md-radius) 0; }
}

/* Heading permalinks become the hanging Markdown marker on wide screens */
@media (width >= 84rem) {
  .doc-body :is(h2, h3) { position: relative; }
  .doc-body :is(h2, h3) > .md-anchor {
    position: absolute; inset-inline-end: 100%; inset-block-start: 0;
    padding-inline-end: 0.45em;
    color: var(--guide); opacity: 1;
    font-family: var(--md-font-mono); font-size: 0.62em; font-weight: 400; line-height: 2;
    white-space: nowrap;
  }
  .doc-body h2 > .md-anchor::before { content: '#'; }
  .doc-body h3 > .md-anchor { line-height: 1.6; }
  .doc-body h3 > .md-anchor::before { content: '##'; }
  .doc-body :is(h2, h3) > .md-anchor:hover { color: var(--md-color-link); }
}

/* Containers (container plugin): the library leaves their look to the site */
.md .md-container {
  --c: var(--md-color-note);
  margin-block: 0 var(--md-space-block);
  padding: 0.75em 1em;
  border: 1px solid color-mix(in oklab, var(--c) 30%, transparent);
  border-inline-start: 0.25em solid var(--c);
  border-radius: 0 var(--md-radius) var(--md-radius) 0;
  & > :last-child { margin-block-end: 0; }
}
.md .md-container-tip { --c: var(--md-color-tip); }
.md .md-container-warning { --c: var(--md-color-warning); }
.md .md-container-caution { --c: var(--md-color-caution); }
.md .md-container-important { --c: var(--md-color-important); }
.md .md-container-details { --c: var(--md-color-border); }
.md .md-container-title { margin-block-end: 0.35em; color: var(--c); font-weight: 600; }
.md .md-container-details > .md-container-title { color: inherit; }

/* Syntax highlighting (site/lib/highlight.js) */
.tok-comment { color: var(--md-color-muted); font-style: italic; }
.tok-keyword, .tok-tag, .tok-prop { color: light-dark(#1d43c4, #9db3ff); }
.tok-string { color: light-dark(#0b6b4f, #7dd3ad); }
.tok-atom { color: light-dark(#9a4a00, #efb37b); }

/* Copy buttons on code blocks (added by site.js) */
.code-wrap { position: relative; }
.code-wrap > .copy {
  position: absolute; inset-block-start: 0.4rem; inset-inline-end: 0.4rem;
  padding: 0.15rem 0.5rem; font-size: 0.75rem; cursor: pointer;
  background: var(--raised); border: 1px solid var(--md-color-border); border-radius: 4px;
  opacity: 0;
}
.code-wrap:hover > .copy, .code-wrap > .copy:focus-visible { opacity: 1; }
@media (hover: none) { .code-wrap > .copy { opacity: 1; } }

/* --- Docs ------------------------------------------------------------------- */

.docs {
  display: grid;
  grid-template-columns: 14rem minmax(0, 1fr) 13rem;
  gap: clamp(1.5rem, 3vw, 3rem);
  max-inline-size: var(--wide); margin-inline: auto; padding: 2.5rem var(--gutter) 4rem;
}

.side { position: sticky; inset-block-start: calc(var(--bar-h) + 1.5rem); align-self: start; max-block-size: calc(100dvh - var(--bar-h) - 3rem); overflow: auto; font-size: 0.9375rem; }

.side h2 { margin: 0 0 0.5rem; font-size: 0.875rem; font-weight: 600; color: var(--md-color-muted); }
.side ul { margin: 0 0 1.5rem; padding: 0; list-style: none; }
.side li a {
  display: block; padding: 0.3rem 0.6rem; border-inline-start: 2px solid var(--md-color-border);
  color: inherit; text-decoration: none;
  &:hover { border-color: var(--guide); }
  &[aria-current] { border-color: var(--guide); color: var(--md-color-link); font-weight: 600; }
}
.toc li.d3 a { padding-inline-start: 1.4rem; font-size: 0.875rem; }

.doc-body { min-inline-size: 0; max-inline-size: var(--measure); }

.doc-foot {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem;
  margin-block-start: 3rem; padding-block-start: 1.25rem; border-block-start: 1px solid var(--md-color-border);
  & a { text-decoration: none; }
  & small { display: block; color: var(--md-color-muted); }
  & .next { margin-inline-start: auto; text-align: end; }
}

.mobile-only, .toc-mobile { display: none; }

details.disclosure {
  margin-block-end: 0.6rem; border: 1px solid var(--md-color-border); border-radius: 4px; background: var(--raised);
  & summary { padding: 0.5rem 0.9rem; cursor: pointer; font-weight: 600; font-size: 0.9375rem; }
  & ul { margin: 0; padding: 0 0.9rem 0.75rem; list-style: none; }
  & li a { display: block; padding: 0.3rem 0; }
}

@media (width < 75rem) {
  .docs { grid-template-columns: 13rem minmax(0, 1fr); }
  .docs > .toc { display: none; }
  .toc-mobile { display: block; }
}

@media (width < 52rem) {
  .docs { grid-template-columns: minmax(0, 1fr); padding-block-start: 1.5rem; }
  .docs > .side { display: none; }
  .mobile-only { display: block; }
}

/* --- Samples and plugins ---------------------------------------------------- */

.page-head { padding-block: clamp(2rem, 5vw, 3.5rem) 1rem; }
.page-head h1 { margin: 0 0 1rem; font-size: clamp(2.4rem, 1.6rem + 3vw, 3.5rem); line-height: 1.05; }

.jump {
  display: flex; flex-wrap: wrap; gap: 0.4rem 0.5rem; margin: 1.5rem 0 0; padding: 0; list-style: none;
  & a { display: inline-block; padding: 0.25rem 0.65rem; border: 1px solid var(--md-color-border); border-radius: 999px; color: inherit; text-decoration: none; font-size: 0.9375rem; }
  & a:hover { border-color: var(--guide); }
}

.item { position: relative; padding-block: clamp(2rem, 5vw, 3.25rem); }
.item::before {
  content: ''; position: absolute; inset-block-start: 0; inset-inline: var(--gutter);
  border-block-start: 1px solid var(--md-color-border);
}
.config { margin-block: 0.75rem 1rem; font-size: 0.9375rem; color: var(--md-color-muted); }
.config code { color: var(--ink); }
.item > p, .item > .prose { max-inline-size: var(--measure); }
.item-links { display: flex; flex-wrap: wrap; gap: 1.25rem; margin-block: 1rem 0; font-size: 0.9375rem; }
.extra { margin-block: 1.25rem; }
.extra > .pane-label { padding-inline: 0; border: 0; }
.extra pre { margin: 0; }

.specs {
  display: grid; grid-template-columns: max-content minmax(0, 1fr); gap: 0; margin: 1.25rem 0 1.5rem; max-inline-size: var(--measure);
  font-size: 0.9375rem;
  & dt, & dd { margin: 0; padding: 0.45rem 0; border-block-start: 1px solid var(--md-color-border); }
  & dt { padding-inline-end: 1.5rem; color: var(--md-color-muted); }
  & dd { font-variant-numeric: tabular-nums; }
  & code { font-size: 0.875em; }
}

.tw-preview { display: block; }

/* The live Web Components sample (styles/editor.css styles the elements) */
.elements-out { display: grid; gap: 1.25rem; }
.elements-out > mdlib-editor { background: var(--raised); }
.elements-events { margin: 0; font-size: 0.875rem; }
.elements-events code { padding: 0.1em 0.35em; border-radius: 3px; background: var(--md-color-code-bg); color: var(--ink); }

/* --- Story ------------------------------------------------------------------ */

.gallery { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 22rem), 1fr)); gap: 1.5rem; margin: 1.5rem 0 0; padding: 0; list-style: none; }
.gallery figure { margin: 0; }
.gallery img { display: block; inline-size: 100%; block-size: auto; aspect-ratio: 3 / 2; object-fit: cover; object-position: top; border: 1px solid var(--md-color-border); border-radius: 4px; background: var(--raised); }
.gallery figcaption { margin-block-start: 0.5rem; font-size: 0.875rem; color: var(--md-color-muted); }
.gallery code { font-size: 0.8125rem; }

.timeline { margin: 1rem 0 0; padding: 0; list-style: none; font-size: 0.9375rem; }
.timeline li { display: grid; grid-template-columns: 3.25rem 4.5rem minmax(0, 1fr); gap: 0.75rem; padding: 0.4rem 0; border-block-start: 1px solid var(--md-color-border); }
.timeline time, .timeline .hash { color: var(--md-color-muted); font-variant-numeric: tabular-nums; }
.timeline .hash { font-family: var(--md-font-mono); font-size: 0.8125rem; }
@media (width < 40rem) { .timeline li { grid-template-columns: 3.25rem minmax(0, 1fr); } .timeline .hash { display: none; } }

/* --- Footer ----------------------------------------------------------------- */

.site-foot {
  margin-block-start: 0;
  padding-block: 2.5rem 3rem;
  border-block-start: 1px solid var(--md-color-border);
  font-size: 0.9375rem;
  & .credit { max-inline-size: 46rem; margin: 0 0 1rem; text-wrap: pretty; }
  & ul { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; margin: 0; padding: 0; list-style: none; color: var(--md-color-muted); }
}

/* --- Odds and ends ---------------------------------------------------------- */

.code-caption { padding-inline: 0 !important; border: 0 !important; }
.source-note { margin-block-start: 1rem; font-size: 0.875rem; }
.doc-note { margin-block-end: 1.5rem; & > .markdown-alert { margin: 0; } }
.gfm-parts { margin-block-end: 1.5rem; }
.tw-host { padding: 1.25rem 1.5rem; }
.story { padding-block: clamp(2rem, 5vw, 3.5rem) 4rem; }
.story > .md { max-inline-size: var(--measure); }
.story-part { padding-block-start: 2.5rem; margin-block-start: 2.5rem; border-block-start: 1px solid var(--md-color-border); }

/* --- Playground (the demo editor, extended) ---------------------------------- */

body.app { background: var(--raised); }

.pg {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  block-size: calc(100dvh - var(--bar-h));
}

.pg-tools {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem 1rem;
  padding: 0.45rem 1rem;
  background: var(--paper);
  border-block-end: 1px solid var(--md-color-border);
  font-size: 0.875rem;
}

.pg-field { display: inline-flex; align-items: center; gap: 0.4rem; }

.pg-btn {
  padding: 0.2rem 0.65rem;
  background: var(--raised);
  border: 1px solid var(--md-color-border); border-radius: 4px;
  cursor: pointer;
  &:hover { border-color: var(--guide); }
}

.pg-status { color: var(--md-color-muted); }
.pg-count { margin-inline-start: auto; color: var(--md-color-muted); font-variant-numeric: tabular-nums; }

.pg-pop {
  position: fixed; inset: auto; margin: 0;
  inline-size: min(25rem, calc(100vw - 1rem)); max-block-size: 75dvh; overflow: auto;
  padding: 0.75rem 1rem;
  background: var(--raised); color: var(--ink);
  border: 1px solid var(--md-color-border); border-radius: 6px;
  box-shadow: 0 10px 30px color-mix(in oklab, black 22%, transparent);
  & fieldset { margin: 0 0 0.5rem; padding: 0; border: 0; }
  & legend { margin-block-end: 0.25rem; padding: 0; font-weight: 600; }
}

.check {
  display: flex; align-items: baseline; gap: 0.55rem; padding: 0.3rem 0; cursor: pointer;
  & small { display: block; color: var(--md-color-muted); font-size: 0.8125rem; }
  & input { accent-color: var(--md-color-link); }
}

.pg-panes {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  min-block-size: 0;
}

.pg-pane { display: flex; flex-direction: column; min-block-size: 0; min-inline-size: 0; }
.pg-left { border-inline-end: 1px solid var(--md-color-border); }
.pg-left > .pane-label { display: flex; align-items: center; min-block-size: 2.4rem; }

#src {
  flex: 1; min-block-size: 0;
  padding: 1rem; margin: 0;
  border: 0; resize: none;
  background: transparent; color: inherit;
  font: 0.875rem/1.5 var(--md-font-mono);
  &:focus-visible { outline-offset: -2px; }
}

.pg-tabs {
  display: flex; min-block-size: 2.4rem; padding-inline: 0.5rem;
  border-block-end: 1px solid var(--md-color-border);
  & [role='tab'] {
    padding: 0.4rem 0.8rem; border: 0; background: none; cursor: pointer;
    color: var(--md-color-muted); font-size: 0.8125rem;
    &[aria-selected='true'] { color: var(--ink); box-shadow: inset 0 -2px var(--guide); }
    &:hover { color: var(--ink); }
    &:focus-visible { outline-offset: -2px; }
  }
}

.pg-panel { flex: 1; min-block-size: 0; overflow: auto; padding: 1rem 1.5rem; }
.pg-panel:focus-visible { outline-offset: -2px; }
.pg-code { padding: 0; }
.pg-code pre { margin: 0; min-block-size: 100%; border: 0; border-radius: 0; background: none; font-size: 0.8125rem; }
.pg-noscript { margin: 0; padding: 0.75rem 1rem; border-block-start: 1px solid var(--md-color-border); }

@media (width < 48rem) {
  .pg { block-size: auto; }
  .pg-panes { grid-template-columns: minmax(0, 1fr); }
  .pg-left { border-inline-end: 0; border-block-end: 1px solid var(--md-color-border); }
  #src { min-block-size: 45dvh; }
  .pg-panel { min-block-size: 45dvh; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}