@font-face {
  font-family: "Source Serif 4";
  src: url("./assets/SourceSerif4Variable-Roman.ttf.woff2") format("woff2");
  font-style: normal;
  font-weight: 200 900;
  font-display: swap;
}

@font-face {
  font-family: "Source Han Serif CN";
  src: url("./assets/SourceHanSerifCN-VF.ttf.woff2") format("woff2-variations");
  font-style: normal;
  font-weight: 250 900;
  font-display: swap;
}

@font-face {
  font-family: "Source Sans 3";
  src: url("./assets/SourceSans3VF-Upright.ttf.woff2") format("woff2-variations");
  font-style: normal;
  font-weight: 200 900;
  font-display: swap;
}

:root,
:root[data-theme="auto"],
:root[data-theme="light"],
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #09090b;
  --bg-elevated: #111113;
  --bg-soft: #18181b;
  --card: #111113;
  --ink: #f4f4f5;
  --ink-soft: #b4b4bc;
  --ink-faint: #7c7c86;
  --line: rgba(244, 244, 245, 0.13);
  --line-strong: rgba(244, 244, 245, 0.24);
  --border: rgba(244, 244, 245, 0.13);
  --btn: #f4f4f5;
  --btn-ink: #09090b;
  --accent: #c7c7d1;
  --accent-strong: #f4f4f5;
  --accent-tint: rgba(244, 244, 245, 0.055);
  --code-bg: #050506;
  --code-ink: #dedee4;
  --shadow: none;
  --radius: 10px;
  --maxw: 1120px;
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --font: "Source Serif 4", "Source Han Serif CN", "Noto Serif SC", "Songti SC", Charter, Georgia, serif;
  --font-display: "Source Serif 4", "Source Han Serif CN", "Noto Serif SC", "Songti SC", Charter, Georgia, serif;
  --font-reading: "Source Serif 4", "Source Han Serif CN", "Noto Serif SC", "Songti SC", Charter, Georgia, serif;
  --font-utility: "Source Sans 3", "Source Han Sans SC", "Noto Sans SC", "PingFang SC", ui-sans-serif, system-ui, sans-serif;
  --font-mono: "SFMono-Regular", "SF Mono", ui-monospace, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--bg); }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-reading);
  font-optical-sizing: auto;
  font-variation-settings: "opsz" 14;
  font-weight: 400;
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: inherit; text-decoration-color: var(--line-strong); text-underline-offset: .18em; }
a:hover { opacity: 1; text-decoration-color: currentColor; }
button, figure, pre { border: 0 !important; }
p { margin: 0; }
h1, h2, h3, .brand, .foot-brand, .title, .name {
  font-family: var(--font-display);
  font-optical-sizing: auto;
  font-variation-settings: "opsz" 32;
  font-weight: 520;
  letter-spacing: .002em;
  line-height: 1.08;
}
h4, button, input, select, textarea, .btn, .icon-btn, .nav-links, .nav-actions,
.eyebrow, .kicker, .label, .meta, .tag, .badge, .go, .foot-links, .foot-bottom,
.code, code, pre, table, .steps .k, .platform .k, .value .k {
  font-family: var(--font-utility);
  font-variation-settings: normal;
}
code, pre, .code { font-family: var(--font-mono); }

::selection { background: #e4e4e7; color: #09090b; }
:focus-visible { outline: 1px solid var(--ink); outline-offset: 3px; }

.wrap { max-width: var(--maxw); padding-inline: 28px; }

/* Masthead and navigation */
header.nav {
  border: 0 !important;
  background: color-mix(in srgb, var(--bg) 94%, transparent) !important;
  backdrop-filter: blur(12px) !important;
}
.nav-inner {
  min-height: 52px;
  height: auto !important;
  max-width: 1280px !important;
  gap: 20px !important;
  padding: 8px 28px !important;
}
.brand {
  gap: 8px !important;
  color: var(--ink) !important;
  font-size: 16px !important;
  letter-spacing: .01em !important;
}
.brand .glass {
  width: 22px;
  height: 22px;
  overflow: hidden;
  color: transparent;
  font-size: 10px !important;
}
.brand .glass::before {
  content: "C";
  display: grid;
  width: 22px;
  height: 22px;
  place-items: center;
  border: 0 !important;
  color: var(--ink);
  font: 600 14px/1 var(--font-display);
}
.brand-mark { width: 20px !important; height: 20px !important; }
.nav-links { margin-left: 24px !important; gap: 18px !important; }
.nav-links a, .nav-text {
  padding: 4px 0 !important;
  border-radius: 0 !important;
  color: var(--ink-soft) !important;
  background: transparent !important;
  font-size: 12px !important;
  font-weight: 600 !important;
  letter-spacing: .065em !important;
  text-transform: uppercase;
}
.nav-links a:hover, .nav-links a[aria-current="page"], .nav-text:hover {
  color: var(--ink) !important;
  border-bottom: 1px solid currentColor;
}
.nav-actions { gap: 10px !important; }

/* Utility controls: firm, compact, square-edged. */
.btn, .icon-btn, .dl {
  min-height: 36px;
  border-radius: var(--radius) !important;
  box-shadow: none !important;
  font-size: 12px !important;
  font-weight: 650 !important;
  letter-spacing: .055em;
  line-height: 1;
  text-transform: uppercase;
  transition: color 140ms var(--ease), background 140ms var(--ease), border-color 140ms var(--ease) !important;
}
.btn { padding: 9px 13px !important; }
.btn-lg { min-height: 44px; padding: 11px 16px !important; font-size: 14px !important; }
.btn-solid, .btn-primary {
  border: 0 !important;
  background: var(--ink) !important;
  color: var(--bg) !important;
}
.btn-solid:hover, .btn-primary:hover { background: transparent !important; color: var(--ink) !important; }
.btn-outline, .btn-ghost, .dl, .icon-btn {
  border: 0 !important;
  background: transparent !important;
  color: var(--ink) !important;
}
.btn-outline:hover, .btn-ghost:hover, .dl:hover, .icon-btn:hover {
  background: var(--accent-tint) !important;
}
.icon-btn { width: auto !important; min-width: 36px; padding: 0 9px; }

/* Editorial hierarchy */
.page-hero, article > .wrap:first-child, article.wrap > .hero { border: 0 !important; }
.page-hero { padding: 64px 0 34px !important; }
.page-hero h1, article h1, .hero h1 {
  max-width: 18ch;
  margin: 0;
  font-size: 16px !important;
  font-weight: 720 !important;
  letter-spacing: .025em !important;
  line-height: 1.2;
}
.hero h1 { max-width: 14ch; }
.hero-top h1 { max-width: 16ch; font-size: 16px !important; }
.lead, .lede, .page-hero .lead, .section-head p, .hero p {
  max-width: 62ch;
  color: var(--ink-soft) !important;
  font-family: var(--font-reading) !important;
  font-size: 16px !important;
  line-height: 1.55 !important;
}
.eyebrow, .kicker, .label {
  color: var(--ink-faint) !important;
  font-size: 12px !important;
  font-weight: 650 !important;
  letter-spacing: .12em !important;
  text-transform: uppercase;
}
section { padding-block: 50px !important; }
.section-head { margin-bottom: 22px !important; }
.section-head h2, section > h2, article h2, .prose h2 {
  font-size: 16px !important;
  font-weight: 650 !important;
  letter-spacing: .015em !important;
}

/* Cards become columns, rules, and restrained panels. */
.start-grid, .platform-grid, .link-grid, .surface-grid, .cards, .docs-grid, .steps,
.values, .feature, .hero-frame, .panel, .callout, .doc, .start-card, .surface,
.pcard, .step, .glass, .note, .tablewrap, .list-block {
  border-radius: var(--radius) !important;
  box-shadow: none !important;
}
.start-grid, .platform-grid, .link-grid, .surface-grid, .cards, .docs-grid, .steps, .values {
  gap: clamp(24px, 4vw, 44px) !important;
  border: 0 !important;
  background: transparent !important;
  overflow: visible;
}
.dl-grid {
  border: 0 !important;
  background: transparent !important;
  gap: clamp(24px, 4vw, 44px) !important;
}
.start-card, .platform, .link-card, .surface, .pcard, .step, .doc, .value {
  border: 0 !important;
  background: transparent !important;
  padding: 4px 0 18px !important;
}
.start-card:hover, .platform:hover, .link-card:hover, .pcard:hover, .doc:hover {
  background: transparent !important;
  color: var(--ink) !important;
}
.feature, .hero-frame, .panel, .callout, .note, .tablewrap, .list-block {
  border: 0 !important;
  background: var(--bg-elevated) !important;
}
.feature-media, .node, .tab, .arch-link, .flow, .hop, .what, .who, .example {
  border: 0 !important;
  box-shadow: none !important;
}
.feature-media { border-radius: 0 !important; }
.tab[aria-selected="true"], .tab.active { border-bottom: 1px solid var(--ink) !important; }
.callout, .note { padding: 14px 16px !important; }
.badge, .tag {
  border: 0 !important;
  border-radius: var(--radius) !important;
  background: transparent !important;
  color: var(--ink-soft) !important;
  padding: 3px 7px !important;
}
.pcard .emoji {
  display: inline-grid;
  width: 24px;
  height: 24px;
  place-items: center;
  border: 0 !important;
  background: var(--accent-tint);
  color: var(--ink-soft);
  font: 650 10px/1 var(--font-utility);
  letter-spacing: .04em;
}

/* Long-form documentation and policies. */
article > .wrap:first-child { padding-top: 56px; padding-bottom: 34px; }
article.wrap > .hero { padding: 56px 0 34px !important; }
article > .wrap, article.wrap { max-width: 920px !important; }
article p, article li, .prose p, .prose li {
  color: var(--ink-soft) !important;
  font-family: var(--font-reading) !important;
  font-size: 16px !important;
  line-height: 1.72 !important;
}
article h2 { margin-top: 52px !important; padding-top: 18px; border-top: 1px solid var(--line); }
article h3 { margin-top: 30px; font-size: 16px; font-weight: 600; letter-spacing: .01em; }
.legal { padding: 18px 0 76px !important; }
.legal .prose { max-width: 760px !important; }
.prose h2 { margin: 48px 0 13px !important; padding-top: 0; border: 0 !important; }
.prose h2:first-of-type { margin-top: 8px !important; }
.prose p + p { margin-top: 15px !important; }
.prose a, article p a, article li a { color: var(--ink) !important; text-decoration: underline; }
pre.code, .code {
  max-width: 100%;
  overflow-x: auto;
  border: 0 !important;
  border-radius: var(--radius) !important;
  background: var(--code-bg) !important;
  color: var(--code-ink) !important;
  box-shadow: none !important;
  line-height: 1.65;
}
code { border: 0 !important; border-radius: var(--radius) !important; background: var(--accent-tint) !important; }
table { border-collapse: collapse; width: 100%; }
th, td { border: 0 !important; border-bottom: 1px solid var(--line) !important; }
th { color: var(--ink) !important; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
td { color: var(--ink-soft) !important; }
.doc-row, .list-row { padding-block: 14px !important; border-color: var(--line) !important; }

footer { border-top: 1px solid var(--line) !important; padding: 36px 0 28px !important; }
.foot-grid { gap: 28px !important; margin-bottom: 30px !important; }
.foot-col h4 { letter-spacing: .09em !important; }
.foot-col a, .foot-links a, .foot-desc { color: var(--ink-soft) !important; }
.foot-bottom { border-color: var(--line) !important; }

/* The old theme control no longer changes the single Cheers web edition. */
#themeToggle { display: none !important; }

/* Homepage composition. Keep the marketing spread explicit so shared entity
   and documentation recipes cannot distort its alternating image rhythm. */
.home-page .hero {
  padding: 64px 0 0 !important;
  min-height: min(920px, calc(100svh - 52px));
}
.home-page .hero-top { padding-inline: 28px; }
.home-page .hero-stage { padding: 44px 28px 0; }
.home-page .hero-frame {
  border: 0 !important;
  border-radius: 0 !important;
  background: #0d0d0f !important;
}
.home-page section:not(.hero) { padding-block: 72px !important; }
.home-page .section-head { margin-bottom: 42px !important; }

.home-page .values {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(28px, 4vw, 52px) !important;
}
.home-page .value,
.home-page .platform,
.home-page .link-card {
  min-width: 0;
  padding: 0 !important;
}

.home-page .feature {
  grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
  gap: clamp(36px, 5vw, 64px) !important;
  align-items: center;
  padding: 64px 0 !important;
  background: transparent !important;
}
.home-page .feature.reverse { grid-template-columns: minmax(0, 1.18fr) minmax(0, .82fr); }
.home-page .feature + .feature { border-top: 1px solid var(--line) !important; }
.home-page .feature-copy { min-width: 0; }
.home-page .feature-copy p { max-width: 42ch; }
.home-page .feature-media {
  display: grid;
  aspect-ratio: 16 / 10;
  place-items: center;
  overflow: hidden;
  background: #0d0d0f !important;
}
.home-page .feature-media img {
  width: 100% !important;
  height: 100% !important;
  object-fit: contain;
  object-position: center;
}

.home-page .platform-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: clamp(36px, 6vw, 72px) !important;
  row-gap: 40px !important;
}
.home-page .split { gap: clamp(40px, 6vw, 72px); }
.home-page .panel { background: transparent !important; }
.home-page .link-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  column-gap: clamp(28px, 4vw, 52px) !important;
  row-gap: 32px !important;
}
.home-page .link-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.home-page .tab {
  margin-right: 14px;
  padding: 7px 0 !important;
  border-radius: 0 !important;
  background: transparent !important;
  color: var(--ink-soft) !important;
}
.home-page .tab[aria-selected="true"] {
  color: var(--ink) !important;
  border-bottom: 1px solid currentColor !important;
}

@media (max-width: 860px) {
  .home-page .hero { min-height: auto; padding-top: 48px !important; }
  .home-page .hero-stage { margin-top: 52px; padding-inline: 20px; }
  .home-page section:not(.hero) { padding-block: 56px !important; }
  .home-page .feature,
  .home-page .feature.reverse {
    grid-template-columns: 1fr;
    gap: 24px !important;
    padding: 48px 0 !important;
  }
  .home-page .feature.reverse .feature-copy { order: unset; }
}

@media (max-width: 700px) {
  .home-page .values,
  .home-page .platform-grid,
  .home-page .link-grid,
  .home-page .link-grid.two { grid-template-columns: 1fr !important; }
  .home-page .feature-media { aspect-ratio: 4 / 3; }
}

@media (max-width: 860px) {
  .wrap { padding-inline: 20px; }
  .nav-inner { padding-inline: 20px !important; }
  .nav-links { display: none !important; }
  .nav-actions .btn-outline, .nav-actions .btn-primary { display: none; }
  .page-hero, article > .wrap:first-child, article.wrap > .hero { padding-top: 42px !important; }
  .page-hero h1, article h1, .hero h1 { font-size: 16px !important; }
  .foot-grid { grid-template-columns: 1fr 1fr !important; }
}

@media (max-width: 560px) {
  .nav-inner { gap: 12px !important; }
  .brand { font-size: 16px !important; }
  .nav-actions { margin-left: auto !important; }
  .nav-actions .btn { min-height: 36px; padding-inline: 9px !important; }
  .start-grid, .platform-grid, .link-grid, .surface-grid, .cards, .docs-grid, .steps, .values {
    grid-template-columns: 1fr !important;
  }
  .foot-grid { grid-template-columns: 1fr !important; }
}

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

/* Extension catalog: a compact operational directory, not a marketing grid. */
.extensions-page .wrap { margin-inline: auto; }
.extensions-page .nav-inner,
.extensions-page .brand,
.extensions-page .nav-links,
.extensions-page .nav-actions,
.extensions-page .foot-inner,
.extensions-page .foot-links {
  display: flex;
  align-items: center;
}
.extensions-page .nav-inner { margin-inline: auto; }
.extensions-page .brand { text-decoration: none; }
.extensions-page .nav-actions { margin-left: auto; }
.extensions-page .foot-inner {
  max-width: 1120px;
  margin-inline: auto;
  justify-content: space-between;
  gap: 20px;
  padding-inline: 28px;
}
.extensions-page .foot-links { gap: 20px; }
.extensions-page .catalog-hero {
  display: grid;
  grid-template-columns: minmax(0, .8fr) minmax(320px, 1.2fr);
  gap: 44px;
  align-items: center;
  padding-block: 52px 36px;
}
.extensions-page .catalog-hero-copy { min-width: 0; }
.extensions-page .catalog-hero h1 {
  max-width: 18ch;
  margin: 8px 0 14px;
  font-size: 16px;
  font-weight: 720;
  line-height: 1.2;
}
.extensions-page .catalog-hero p { color: var(--ink-soft); font-size: 16px; }
.extensions-page .catalog-shot {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-elevated);
}
.extensions-page .catalog-shot img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.catalog-toolbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 12px;
  padding-block: 18px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.catalog-toolbar label { min-width: 0; }
.catalog-toolbar span {
  display: block;
  margin-bottom: 5px;
  color: var(--ink-faint);
  font: 650 12px/1.2 var(--font-utility);
  letter-spacing: .08em;
  text-transform: uppercase;
}
.catalog-toolbar input,
.catalog-toolbar select {
  width: 100%;
  min-height: 36px;
  padding: 8px 10px;
  border: 0;
  border-radius: var(--radius);
  background: var(--bg-soft);
  color: var(--ink);
  font-size: 14px;
}
.catalog-status {
  min-height: 24px;
  padding-top: 14px;
  color: var(--ink-faint);
  font: 600 12px/1.4 var(--font-utility);
}
.extension-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 44px;
  row-gap: 0;
}
.extension-entry {
  min-width: 0;
  padding-block: 24px;
  border-bottom: 1px solid var(--line);
}
.extension-entry-head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.extension-entry-mark {
  display: grid;
  width: 36px;
  height: 36px;
  flex: 0 0 36px;
  place-items: center;
  border-radius: var(--radius);
  background: var(--bg-soft);
  color: var(--ink);
  font: 700 12px/1 var(--font-utility);
}
.extension-entry h2 { margin: 0; font-size: 16px; }
.extension-entry .entry-meta {
  margin-top: 4px;
  color: var(--ink-faint);
  font: 600 12px/1.35 var(--font-utility);
}
.extension-entry .entry-description {
  margin-top: 12px;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.6;
}
.extension-entry .entry-tags,
.extension-entry .entry-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.extension-entry .entry-tag {
  padding: 3px 7px;
  border-radius: var(--radius);
  background: var(--accent-tint);
  color: var(--ink-soft);
  font: 650 12px/1.3 var(--font-utility);
}
.extension-entry .entry-actions a {
  display: inline-flex;
  min-height: 36px;
  align-items: center;
  padding: 8px 11px;
  border-radius: var(--radius);
  background: transparent;
  color: var(--ink);
  font: 650 12px/1 var(--font-utility);
  letter-spacing: .04em;
  text-decoration: none;
  text-transform: uppercase;
}
.extension-entry .entry-actions a:first-child { background: var(--ink); color: var(--bg); }
.extension-entry .entry-actions a:hover { background: var(--accent-tint); color: var(--ink); }
.catalog-empty {
  grid-column: 1 / -1;
  padding-block: 42px;
  color: var(--ink-soft);
  font-size: 14px;
}
.catalog-guidance {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
  padding-block: 48px;
}
.catalog-guidance h2 { margin: 0 0 8px; }
.catalog-guidance p { color: var(--ink-soft); font-size: 14px; }

@media (max-width: 800px) {
  .extensions-page .catalog-hero { grid-template-columns: 1fr; gap: 24px; }
  .extension-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  .catalog-toolbar, .catalog-guidance { grid-template-columns: 1fr; }
  .extensions-page .catalog-hero { padding-top: 36px; }
}