/*
 * Reducto On-Prem — shared stylesheet.
 *
 * Ported from the Reducto design system in reductoai/frontend:
 *   apps/blog/src/styles/tokens.css   (tokens: plum brand, grey neutrals, accent scales)
 *   apps/blog/src/styles/global.css   (topbar, tags, footer)
 *   apps/blog/src/layouts/Post.astro  (article head, TOC, prose)
 *
 * This is the only copy anyone edits. Each site's public/assets/reducto.css is
 * generated from it by cloudflare/scripts/sync_theme.py — see cloudflare/AGENTS.md.
 */

/* ---------- Fonts ---------- */

@font-face {
  font-family: "Roobert";
  src: url("./fonts/roobert-regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Roobert";
  src: url("./fonts/roobert-medium.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Berkeley Mono";
  src: url("./fonts/berkeleymono-regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Reducto Serif";
  src: url("./fonts/reducto-serif-regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

/* ---------- Tokens ---------- */

:root {
  --base-white: #ffffff;

  --grey-50: #fafafa;
  --grey-100: #f5f5f5;
  --grey-200: #e5e5e5;
  --grey-300: #d4d4d4;
  --grey-400: #a3a3a3;
  --grey-500: #737373;
  --grey-600: #525252;
  --grey-700: #404040;
  --grey-800: #262626;
  --grey-900: #171717;
  --grey-950: #0a0a0a;

  --plum-50: #f4ebf1;
  --plum-100: #f2e0ec;
  --plum-200: #e3bdd6;
  --plum-300: #d59dc3;
  --plum-700: #6f255b;
  --plum-800: #4b163d;
  --plum-900: #380f2d;

  --slate-200: #b2bbd2;
  --slate-300: #91a3ca;
  --slate-800: #142b4b;

  --pine-200: #b2d1c3;
  --pine-300: #8cc5aa;
  --pine-800: #143d2a;

  --honey-200: #ecd6ac;
  --honey-300: #ebcb89;
  --honey-800: #835f16;

  --carmine-200: #dbabae;
  --carmine-300: #dd8184;
  --carmine-800: #46070b;

  --rust-200: #edbaa9;
  --rust-300: #e5a087;
  --rust-800: #7a3d14;

  --surface: var(--base-white);
  --surface-hover: var(--grey-50);
  --surface-pressed: var(--grey-100);

  --fg: var(--grey-950);
  --fg-primary: var(--grey-900);
  --fg-secondary: var(--grey-500);
  --fg-disabled: var(--grey-400);

  --border: var(--grey-300);
  --border-subtle: var(--grey-200);

  --brand: var(--plum-800);
  --brand-fg: var(--plum-50);

  --space-1: 4px;
  --space-1-5: 6px;
  --space-2: 8px;
  --space-2-5: 10px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-18: 72px;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-full: 9999px;

  --border-width-xs: 0.5px;
  --border-width-sm: 1px;

  --font-sans: "Roobert", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  --font-serif: "Reducto Serif", "Source Serif Pro", Georgia, serif;
  --font-mono: "Berkeley Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --fs-xs-1: 12px;
  --fs-xs-2: 13px;
  --fs-sm: 14px;
  --fs-md: 16px;
  --fs-lg-1: 20px;

  --fw-regular: 400;
  --fw-medium: 500;
}

/* ---------- Base ---------- */

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-sans);
  font-size: var(--fs-md);
  line-height: 28px;
  color: var(--fg-primary);
  background: var(--base-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

main {
  flex: 1;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: var(--plum-700);
  text-decoration: none;
  transition: color 120ms ease;
}
a:hover {
  color: var(--plum-800);
}

code,
pre,
.mono {
  font-family: var(--font-mono);
}

code {
  font-size: 0.92em;
  background: var(--grey-100);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  color: var(--plum-800);
  border: 1px solid var(--grey-200);
  overflow-wrap: anywhere;
}

:focus-visible {
  outline: 2px solid var(--plum-300);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* Shared mono eyebrow: dates, labels, section kickers. */
.mono-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-secondary);
}

/* ---------- Topbar ---------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: var(--border-width-xs) solid var(--border);
}
.topbar-inner {
  max-width: 1180px;
  margin: 0 auto;
  height: 64px;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}
.brand-mark {
  height: 42px;
  width: auto;
  display: block;
  /* The wordmark SVG carries whitespace on the left; pull it back to the gutter. */
  margin-left: -14px;
}
.brand-divider {
  width: 1px;
  height: 18px;
  background: var(--border);
  margin: 0 var(--space-1);
}
.brand-sub {
  font-size: var(--fs-sm);
  color: var(--fg-secondary);
  text-decoration: none;
  white-space: nowrap;
}
.brand-sub:hover {
  color: var(--fg);
}
.nav-links {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.nav-link {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 var(--space-2-5);
  border-radius: var(--radius-md);
  font-size: var(--fs-xs-2);
  color: var(--fg-secondary);
  text-decoration: none;
  white-space: nowrap;
  transition:
    background 120ms ease,
    color 120ms ease;
}
.nav-link:hover {
  background: var(--surface-hover);
  color: var(--fg);
}
.nav-link.active {
  color: var(--fg);
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1-5);
  height: 28px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-md);
  background: var(--brand);
  color: var(--brand-fg);
  font-size: var(--fs-xs-2);
  font-weight: var(--fw-medium);
  text-decoration: none;
  white-space: nowrap;
  margin-left: var(--space-2);
  transition: background 120ms ease;
}
.nav-cta:hover {
  background: var(--plum-900);
  color: var(--brand-fg);
}
.nav-cta svg {
  width: 12px;
  height: 12px;
}

/* ---------- Tags ---------- */

.tag {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  gap: var(--space-1);
  height: 22px;
  padding: 0 var(--space-2);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  border: var(--border-width-sm) solid;
  background: transparent;
  white-space: nowrap;
  width: fit-content;
}
.tag::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: currentColor;
  opacity: 0.7;
}
.tag-infrastructure {
  color: var(--slate-800);
  border-color: var(--slate-300);
  background: color-mix(in srgb, var(--slate-200) 25%, transparent);
}
.tag-engineering {
  color: var(--pine-800);
  border-color: var(--pine-300);
  background: color-mix(in srgb, var(--pine-200) 25%, transparent);
}
.tag-restricted {
  color: var(--plum-800);
  border-color: var(--plum-300);
  background: color-mix(in srgb, var(--plum-200) 25%, transparent);
}
.tag-locked {
  color: var(--grey-700);
  border-color: var(--grey-300);
  background: color-mix(in srgb, var(--grey-200) 40%, transparent);
}

/* ---------- Page head ---------- */

.page-head {
  padding: var(--space-12) 0 var(--space-12);
  border-bottom: var(--border-width-xs) solid var(--border);
  margin-bottom: var(--space-12);
}
.crumbs {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0 0 var(--space-6);
  flex-wrap: wrap;
}
.crumbs .sep {
  color: var(--fg-disabled);
  font-family: var(--font-mono);
}
.page-title {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(40px, 5.4vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin: 0 0 var(--space-6);
  text-wrap: balance;
  max-width: 22ch;
}
.page-dek {
  font-family: var(--font-sans);
  font-size: var(--fs-lg-1);
  line-height: 28px;
  color: var(--fg-secondary);
  max-width: 65ch;
  margin: 0;
  text-wrap: pretty;
}

/* ---------- Section ---------- */

.section {
  padding-bottom: var(--space-12);
}
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: var(--border-width-xs) solid var(--border);
  margin-bottom: var(--space-2);
}
.section-title {
  font-family: var(--font-sans);
  font-size: var(--fs-lg-1);
  font-weight: var(--fw-medium);
  letter-spacing: -0.01em;
  color: var(--fg);
  margin: 0;
}

/* ---------- Guide index rows ---------- */

.guide-list {
  display: flex;
  flex-direction: column;
}
.guide-row {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: var(--space-8);
  align-items: start;
  padding: var(--space-8) 0;
  border-bottom: var(--border-width-xs) solid var(--border-subtle);
  text-decoration: none;
  color: inherit;
}
.guide-row:last-child {
  border-bottom: 0;
}
.guide-meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding-top: 3px;
}
.guide-title {
  font-family: var(--font-sans);
  font-size: var(--fs-lg-1);
  font-weight: var(--fw-medium);
  line-height: 28px;
  letter-spacing: -0.01em;
  color: var(--fg);
  margin: 0 0 var(--space-2);
  transition: color 120ms ease;
}
.guide-row:hover .guide-title {
  color: var(--plum-800);
}
.guide-desc {
  font-size: var(--fs-md);
  line-height: 26px;
  color: var(--fg-secondary);
  margin: 0;
  max-width: 68ch;
  text-wrap: pretty;
}
.guide-more {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1-5);
  margin-top: var(--space-3);
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--plum-700);
}
.guide-more svg {
  width: 12px;
  height: 12px;
  transition: transform 120ms ease;
}
.guide-row:hover .guide-more svg {
  transform: translateX(3px);
}

/* A guide the viewer's organization can request but not yet open. */
.guide-row[data-access="locked"] .guide-title,
.guide-row[data-access="locked"]:hover .guide-title {
  color: var(--fg-secondary);
}
.guide-row[data-access="locked"] .guide-more {
  color: var(--grey-700);
}

/* ---------- Link list (resources) ---------- */

.link-list {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-2);
}
.link-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  border: var(--border-width-sm) solid var(--border-subtle);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  color: var(--fg);
  transition:
    border-color 120ms ease,
    background 120ms ease;
}
.link-list a:hover {
  border-color: var(--border);
  background: var(--surface-hover);
  color: var(--plum-800);
}
.link-list svg {
  width: 12px;
  height: 12px;
  flex: none;
  color: var(--fg-disabled);
}
.link-list a:hover svg {
  color: var(--plum-700);
}

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

.footer {
  border-top: var(--border-width-xs) solid var(--border);
  margin-top: var(--space-18);
  padding: var(--space-10) 0;
  background: var(--grey-50);
}
.footer-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: var(--fs-xs-1);
  color: var(--fg-secondary);
}
.footer-inner a {
  color: var(--fg-secondary);
}
.footer-inner a:hover {
  color: var(--plum-700);
}
.footer-right {
  display: flex;
  gap: var(--space-4);
}

/* ---------- Article layout ---------- */

.progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: transparent;
  z-index: 100;
  pointer-events: none;
}
.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--plum-700);
  transition: width 60ms linear;
}

.back-row {
  padding: var(--space-6) 0 0;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-secondary);
  text-decoration: none;
  transition: color 120ms ease;
}
.back-link:hover {
  color: var(--plum-700);
}
.back-link svg {
  width: 12px;
  height: 12px;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: var(--space-12);
  align-items: start;
  padding-bottom: var(--space-18);
}
.article-body {
  max-width: 720px;
  min-width: 0;
}

/* ---------- Table of contents ---------- */

.toc {
  position: sticky;
  top: 88px;
  padding-top: var(--space-2);
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}
.toc-label {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-secondary);
  margin: 0 0 var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-width-xs) solid var(--border);
}
.toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: toc;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.toc li {
  counter-increment: toc;
}
.toc a {
  display: flex;
  gap: var(--space-2);
  font-size: var(--fs-xs-2);
  color: var(--fg-secondary);
  text-decoration: none;
  line-height: 18px;
  padding: 4px 0;
  transition: color 120ms ease;
}
.toc a::before {
  content: counter(toc, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-disabled);
  flex: none;
  min-width: 18px;
}
.toc a:hover {
  color: var(--fg);
}
.toc a.is-active {
  color: var(--plum-800);
  font-weight: var(--fw-medium);
}
.toc a.is-active::before {
  color: var(--plum-700);
}

/* ---------- Prose ---------- */

.prose {
  font-family: var(--font-sans);
  font-size: var(--fs-md);
  line-height: 28px;
  color: var(--grey-800);
}
.prose > * {
  margin: 0;
}
.prose > * + * {
  margin-top: var(--space-6);
}
.prose p {
  font-size: 16px;
  line-height: 28px;
  color: var(--grey-800);
  text-wrap: pretty;
}
.prose h2 {
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: 26px;
  line-height: 32px;
  letter-spacing: -0.01em;
  color: var(--fg);
  margin: var(--space-12) 0 0;
  padding-top: var(--space-6);
  border-top: var(--border-width-xs) solid var(--border);
  scroll-margin-top: 88px;
}
.prose > h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: 0;
}
.prose h3 {
  font-family: var(--font-sans);
  font-weight: var(--fw-medium);
  font-size: 18px;
  line-height: 26px;
  color: var(--fg);
  margin: var(--space-8) 0 0;
  scroll-margin-top: 88px;
}
.prose a {
  color: var(--plum-800);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--plum-300) 70%, transparent);
  transition:
    color 120ms ease,
    border-color 120ms ease;
}
.prose a:hover {
  border-bottom-color: var(--plum-700);
  color: var(--plum-900);
}
.prose strong {
  color: var(--fg);
  font-weight: var(--fw-medium);
}
.prose ul,
.prose ol {
  padding-left: 1.2em;
}
.prose li {
  margin: var(--space-2) 0;
}
.prose li > p {
  margin: 0;
}
.prose code {
  font-family: var(--font-mono);
  font-size: 14px;
  background: var(--grey-100);
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  color: var(--plum-800);
  border: 1px solid var(--grey-200);
  overflow-wrap: anywhere;
}
.prose pre {
  background: var(--grey-900);
  color: var(--grey-100);
  border-radius: var(--radius-md);
  overflow-x: auto;
  border: 1px solid var(--grey-800);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 22px;
  padding: 16px;
  margin: 0;
}
.prose pre code {
  background: none;
  padding: 0;
  border: none;
  color: inherit;
  font-size: inherit;
}
.prose hr {
  border: 0;
  border-top: var(--border-width-xs) solid var(--border);
  margin: var(--space-10) 0;
}
.prose img {
  max-width: 100%;
  border-radius: var(--radius-md);
}

/* Fenced blocks carry a mono language chip in a gutter above the code, so a long
   line can never scroll underneath it. */
.code-block {
  position: relative;
}
.code-block > pre {
  padding-top: 32px;
}
.code-block > .code-lang {
  position: absolute;
  top: 11px;
  right: 14px;
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--grey-500);
  pointer-events: none;
}
.code-block > .code-lang::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  border-radius: 1px;
  margin-right: 6px;
  vertical-align: 1px;
  background: currentColor;
}
.code-block > .code-lang[data-lang="yaml"] {
  color: var(--plum-300);
}
.code-block > .code-lang[data-lang="bash"] {
  color: var(--slate-300);
}
.code-block > .code-lang[data-lang="json"] {
  color: var(--pine-300);
}

/* Syntax tokens. Muted on purpose: the accent scales, not a rainbow theme. */
.prose pre .t-com {
  color: #8c8c8c;
  font-style: italic;
}
.prose pre .t-key {
  color: var(--plum-300);
}
.prose pre .t-str {
  color: var(--pine-300);
}
.prose pre .t-num {
  color: var(--honey-300);
}
.prose pre .t-cmd {
  color: var(--slate-300);
}
.prose pre .t-flg {
  color: var(--rust-300);
}
.prose pre .t-var {
  color: var(--plum-200);
  font-style: italic;
}
.prose pre .t-pun {
  color: #9a9a9a;
}

/* ---------- Tables ---------- */

.prose .table-wrap {
  overflow-x: auto;
  border: var(--border-width-sm) solid var(--border-subtle);
  border-radius: var(--radius-md);
}
.prose table {
  border-collapse: collapse;
  width: 100%;
  font-size: var(--fs-sm);
  line-height: 22px;
}
.prose th,
.prose td {
  padding: 12px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: var(--border-width-sm) solid var(--border-subtle);
}
.prose tr:last-child td {
  border-bottom: 0;
}
.prose thead th {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: var(--fw-regular);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-secondary);
  background: var(--grey-50);
  white-space: nowrap;
}
.prose tbody tr:hover {
  background: var(--grey-50);
}
.prose td code {
  white-space: nowrap;
}
.prose table.table-tight td:first-child {
  white-space: nowrap;
}

/* ---------- Callouts ---------- */

.callout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-4) var(--space-4) var(--space-4) var(--space-6);
  border: var(--border-width-sm) solid;
  border-left-width: 2px;
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  line-height: 24px;
}
.callout > p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 24px;
  color: var(--grey-800);
}
.callout > p + p {
  margin-top: var(--space-2);
}
.callout-label {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.callout-note {
  border-color: var(--slate-300);
  background: color-mix(in srgb, var(--slate-200) 18%, transparent);
}
.callout-note .callout-label {
  color: var(--slate-800);
}
.callout-caution {
  border-color: var(--honey-300);
  background: color-mix(in srgb, var(--honey-200) 25%, transparent);
}
.callout-caution .callout-label {
  color: var(--honey-800);
}
.callout-danger {
  border-color: var(--carmine-300);
  background: color-mix(in srgb, var(--carmine-200) 22%, transparent);
}
.callout-danger .callout-label {
  color: var(--carmine-800);
}

/* ---------- Checklists ---------- */

.prose .tasks {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.prose .tasks li {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
  margin: 0;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  line-height: 24px;
  transition: background 120ms ease;
}
.prose .tasks li:hover {
  background: var(--grey-50);
}
.prose .tasks input[type="checkbox"] {
  margin: 5px 0 0;
  width: 14px;
  height: 14px;
  flex: none;
  accent-color: var(--plum-700);
  cursor: pointer;
}
.prose .tasks label {
  flex: 1;
  cursor: pointer;
}
.prose .tasks input[type="checkbox"]:checked + label {
  color: var(--fg-secondary);
  text-decoration: line-through;
  text-decoration-color: var(--fg-disabled);
}
.prose .tasks li {
  flex-wrap: wrap;
}
.prose .tasks .task-detail {
  flex-basis: 100%;
  padding-left: calc(14px + var(--space-3));
}
.checklist-group {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fg-secondary);
  margin: var(--space-8) 0 var(--space-2);
}

/* ---------- Access notice ---------- */

.notice {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  margin-top: var(--space-6);
  padding: var(--space-4);
  border: var(--border-width-sm) solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--grey-50);
  font-size: var(--fs-sm);
  line-height: 24px;
  color: var(--fg-secondary);
}
.notice svg {
  width: 14px;
  height: 14px;
  flex: none;
  margin-top: 5px;
  color: var(--fg-disabled);
}
.notice p {
  margin: 0;
}
.notice p + p {
  margin-top: var(--space-2);
}

/* ---------- Responsive ---------- */

@media (max-width: 980px) {
  .article-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-8);
  }
  .toc {
    position: static;
    max-height: none;
    order: -1;
    padding: var(--space-4);
    border: var(--border-width-sm) solid var(--border-subtle);
    border-radius: var(--radius-md);
  }
  .article-body {
    max-width: none;
  }
}

@media (max-width: 720px) {
  .container {
    padding: 0 var(--space-4);
  }
  .topbar-inner {
    padding: 0 var(--space-4);
  }
  .brand-sub {
    display: none;
  }
  .brand-divider {
    display: none;
  }
  .guide-row {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
  .page-head {
    padding: var(--space-8) 0;
    margin-bottom: var(--space-8);
  }
  .page-title {
    font-size: 34px;
  }
  .page-dek {
    font-size: var(--fs-md);
    line-height: 26px;
  }
  .footer-inner {
    padding: 0 var(--space-4);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    transition-duration: 0.01ms !important;
  }
}

/* ---------- Generated-hub components ---------- */

/* Ordered steps from <Steps>/<Step>. */
.prose .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
  display: flex;
  flex-direction: column;
}
.prose .steps > li {
  counter-increment: step;
  position: relative;
  padding: var(--space-4) 0 var(--space-4) var(--space-10);
  border-left: var(--border-width-sm) solid var(--border-subtle);
  margin-left: 10px;
}
.prose .steps > li::before {
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: -11px;
  top: var(--space-4);
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--fg-secondary);
  background: var(--grey-50);
  border: var(--border-width-sm) solid var(--border);
  border-radius: var(--radius-sm);
}
.prose .steps > li > h4 {
  font-family: var(--font-sans);
  font-size: var(--fs-md);
  font-weight: var(--fw-medium);
  color: var(--fg);
  margin: 0 0 var(--space-2);
}
.prose .steps > li > * + * {
  margin-top: var(--space-3);
}

/* Collapsible sections from <Accordion>. */
.prose .accordion {
  border: var(--border-width-sm) solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
}
.prose .accordion + .accordion {
  margin-top: var(--space-2);
}
.prose .accordion summary {
  cursor: pointer;
  font-weight: var(--fw-medium);
  font-size: var(--fs-sm);
  color: var(--fg);
}
.prose .accordion > * + * {
  margin-top: var(--space-3);
}

/* Stacked tab panes from <Tabs>/<Tab>. */
.prose .tab-block {
  border: var(--border-width-sm) solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
}
.prose .tab-block + .tab-block {
  margin-top: var(--space-2);
}
.prose .tab-label {
  display: block;
  margin-bottom: var(--space-2);
}

/* Changelog releases from <Update>. */
.prose .release {
  padding: var(--space-8) 0;
  border-bottom: var(--border-width-sm) solid var(--border-subtle);
}
.prose .release:first-child {
  padding-top: 0;
}
.release-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  margin-bottom: var(--space-4);
}
.release-label {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--fg);
}
.tag-new {
  color: var(--honey-800);
  border-color: var(--honey-300);
  background: color-mix(in srgb, var(--honey-200) 30%, transparent);
}

/* Link-list rows that carry a description line. */
.link-list .guide-desc {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--fs-sm);
  line-height: 22px;
}

/* "New release" band under the topbar on the hub index. */
.release-banner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  padding: var(--space-2-5) var(--space-6);
  border-bottom: var(--border-width-sm) solid var(--plum-300);
  background: color-mix(in srgb, var(--plum-200) 22%, transparent);
  font-size: var(--fs-sm);
  color: var(--fg);
}
.release-banner[hidden] {
  display: none;
}
.release-banner a {
  color: var(--plum-800);
  font-weight: var(--fw-medium);
}
.release-banner button {
  margin-left: auto;
  border: 0;
  background: transparent;
  font-size: var(--fs-md);
  color: var(--fg-secondary);
  cursor: pointer;
  padding: 0 var(--space-1);
}
.release-banner button:hover {
  color: var(--fg);
}
.diagram {
  margin: var(--space-6) 0;
  overflow-x: auto;
  text-align: center;
}
.diagram svg {
  max-width: 100%;
  height: auto;
}
.diagram pre.mermaid {
  background: none;
  border: 0;
  font: inherit;
}