/* ============================================================
     QUALITY STUDIO — shared product styles for localized pages.
     Independent navigation and blue accent, one reusable type scale.
     ============================================================ */
  :root {
    --bg: #0a0e13;
    --raise: #0f151c;
    --panel: #131b24;
    --line: #1f2a36;
    --soft: #182230;
    --text: #e8eef4;
    --muted: #93a1af;
    --faint: #5c6a77;
    --accent: #8ab4f8;
    --blue: #45b8d8;
    --purple: #b18cff;
    --green: #58d68d;
    --red: #e06a6a;
    --quality: #8ab4f8;
    --diagram-bg: #1b1b1f;
    --space-1: 8px;
    --space-2: 12px;
    --space-3: 16px;
    --space-4: 18px;
    --radius-sm: 7px;
    --radius-md: 12px;
    --mono: ui-monospace, "Cascadia Code", "JetBrains Mono", Consolas, monospace;
    --sans: "Segoe UI Variable Display", "Segoe UI", -apple-system, "Helvetica Neue", Arial, sans-serif;
  }
  * { box-sizing: border-box; }
  html { scroll-behavior: smooth; scroll-padding-top: 64px; }
  html, body { margin: 0; padding: 0; }
  body { background: var(--bg); color: var(--text); font-family: var(--sans); line-height: 1.55; -webkit-font-smoothing: antialiased; }
  ::selection { background: var(--accent); color: #14100a; }
  .wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

  /* ---- hero ---- */
  .hero { padding: 74px 0 48px; position: relative; overflow: hidden; }
  .hero::before {
    content: ""; position: absolute; inset: 0;
    background-image: linear-gradient(var(--soft) 1px, transparent 1px), linear-gradient(90deg, var(--soft) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(ellipse 90% 85% at 50% 0%, black 25%, transparent 74%);
    opacity: .45; pointer-events: none;
  }
  .hero .wrap { position: relative; }
  .eyebrow { font-family: var(--mono); font-size: 12.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--accent); }
  h1 { font-size: clamp(2.3rem, 5.4vw, 3.6rem); line-height: 1.06; letter-spacing: -.025em; font-weight: 750; max-width: 800px; margin: 16px 0 16px; }
  .lede { max-width: 68ch; color: var(--muted); font-size: 1.1rem; margin: 0 0 18px; }
  .status-line { font-family: var(--mono); font-size: 12.5px; color: var(--faint); margin: 0 0 14px; }
  .status-line b { color: var(--green); font-weight: 600; }
  .hero-links { display: flex; gap: 18px; flex-wrap: wrap; }
  .hero-links a { color: var(--accent); font-family: var(--mono); font-size: 12.5px; text-decoration: none; }
  .hero-links a:hover, .hero-links a:focus-visible { text-decoration: underline; text-underline-offset: 4px; outline: none; }

  /* ---- screenshots ---- */
  .shot { border: 1px solid var(--line); border-radius: 12px; background: var(--diagram-bg); padding: 12px; margin: 0; }
  .shot img { display: block; width: 100%; height: auto; border-radius: 6px; }
  .shot figcaption { font-family: var(--mono); font-size: 11.5px; color: var(--faint); padding: 10px 4px 0; }
  .hero-shot { padding-bottom: 10px; }

  /* ---- sections ---- */
  section { padding: 34px 0; }
  .label { color: var(--accent); font: 12px var(--mono); letter-spacing: .13em; text-transform: uppercase; }
  h2 { font-size: clamp(1.55rem, 3vw, 2rem); line-height: 1.18; letter-spacing: -.02em; margin: 8px 0 10px; }
  .intro { max-width: 72ch; color: var(--muted); margin: 0 0 22px; }
  .intro code, .fact code, .facts p code { font: 12.5px var(--mono); color: var(--text); }

  .facts { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
  .fact { padding: 21px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
  .fact h3 { margin: 0 0 8px; font-size: 1rem; }
  .fact p { margin: 0; color: var(--muted); }

  .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
  .step { border-top: 2px solid var(--line); background: linear-gradient(180deg, color-mix(in srgb, var(--panel) 70%, transparent), transparent); padding: 16px; }
  .step b { display: block; font: 11px var(--mono); color: var(--accent); letter-spacing: .08em; margin-bottom: 7px; }
  .step p { margin: 0; color: var(--muted); font-size: .9rem; }

  .pattern-link { display: inline-block; margin-top: 18px; color: var(--accent); font: 12.5px var(--mono); text-decoration: none; }
  .pattern-link:hover, .pattern-link:focus-visible { text-decoration: underline; text-underline-offset: 4px; outline: none; }
  .follow { margin-top: 18px; }
  .lead-in { margin-bottom: 14px; }
  .no-bottom { margin-bottom: 0; }

  /* ---- model catalog ---- */
  .model-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--panel); }
  .model-table { width: 100%; border-collapse: collapse; min-width: 720px; }
  .model-table th, .model-table td { padding: var(--space-2) var(--space-3); text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
  .model-table th { color: var(--faint); font: 11px var(--mono); letter-spacing: .1em; text-transform: uppercase; }
  .model-table tbody:last-child tr:last-child td { border-bottom: 0; }
  .model-table code { color: var(--text); font: 12.5px var(--mono); }
  .model-table td { color: var(--muted); font-size: .9rem; }
  .model-table .model-id { color: var(--text); font-weight: 600; }
  .model-table .is-default { color: var(--green); }
  .model-table details { margin: calc(var(--space-2) * -1) calc(var(--space-3) * -1); }
  .model-table summary { display: grid; grid-template-columns: minmax(220px, 1fr) auto auto auto; align-items: center; gap: var(--space-3); padding: var(--space-2) var(--space-3); cursor: pointer; list-style: none; }
  .model-table summary::-webkit-details-marker { display: none; }
  .model-table summary::before { content: "+"; color: var(--accent); font: 600 14px var(--mono); grid-column: 4; grid-row: 1; }
  .model-table details[open] summary::before { content: "−"; }
  .model-table summary:focus-visible { outline: 2px solid var(--accent); outline-offset: -2px; }
  .obsolete-detail { padding: 0 var(--space-3) var(--space-2); color: var(--faint); font-size: .85rem; }
  .chip { display: inline-flex; align-items: center; border: 1px solid var(--line); border-radius: 999px; padding: 2px var(--space-1); font: 10.5px var(--mono); letter-spacing: .06em; text-transform: uppercase; white-space: nowrap; }
  .chip-current { color: var(--green); border-color: color-mix(in srgb, var(--green) 45%, var(--line)); }
  .chip-obsolete { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); }
  .model-sources { color: var(--faint); font: 11.5px/1.6 var(--mono); margin: var(--space-3) 0 0; }
  .model-sources a, .intro a, .fact a { color: var(--accent); }

  /* ---- levels & kinds ---- */
  .levels-kinds { display: grid; grid-template-columns: 1.1fr .9fr; gap: 18px; align-items: start; }
  .levels { display: flex; flex-direction: column; gap: 8px; margin: 0; padding: 0; list-style: none; }
  .level { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding: 12px 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); font-weight: 600; }
  .level small { color: var(--faint); font: 11px var(--mono); letter-spacing: .06em; text-align: right; }
  .level:nth-child(2) { margin-left: 5%; }
  .level:nth-child(3) { margin-left: 10%; }
  .level:nth-child(4) { margin-left: 15%; box-shadow: inset 3px 0 var(--quality); }
  .level:nth-child(5) { margin-left: 20%; }
  .kinds { display: flex; flex-direction: column; gap: 8px; }
  .kind { padding: 14px 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
  .kind b { display: flex; align-items: center; gap: 8px; font: 600 11.5px var(--mono); letter-spacing: .1em; text-transform: uppercase; }
  .kind b::before { content: ""; width: 8px; height: 8px; border-radius: 2px; background: var(--kind-hue, var(--quality)); }
  .kind.k-code b { color: var(--quality); --kind-hue: var(--quality); }
  .kind.k-security b { color: var(--red); --kind-hue: var(--red); }
  .kind.k-performance b { color: var(--green); --kind-hue: var(--green); }
  .kind p { margin: 6px 0 0; color: var(--muted); font-size: .9rem; }

  /* ---- sidecar block ---- */
  .sidecar { display: grid; grid-template-columns: .9fr 1.1fr; gap: 18px; align-items: start; }
  pre.json { margin: 0; border: 1px solid var(--line); border-radius: 12px; background: var(--raise); padding: 18px; overflow-x: auto; font: 12.5px/1.7 var(--mono); color: var(--muted); }
  pre.json .k { color: var(--quality); }
  pre.json .s { color: var(--green); }
  pre.json .n { color: var(--accent); }
  pre.json .c { color: var(--faint); }
  .staleness { display: flex; flex-direction: column; gap: 8px; }
  .state { display: flex; align-items: baseline; gap: 10px; padding: 12px 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
  .state code { font: 600 12px var(--mono); min-width: 92px; }
  .state.st-fresh code { color: var(--green); }
  .state.st-stale code { color: var(--accent); }
  .state.st-drift code { color: var(--purple); }
  .state.st-missing code { color: var(--faint); }
  .state span { color: var(--muted); font-size: .9rem; }

  /* ---- footer ---- */
  footer { border-top: 1px solid var(--line); margin-top: 34px; padding: 28px 0 42px; color: var(--faint); font-size: .88rem; }
  footer .wrap { display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
  footer a { color: var(--muted); text-decoration: none; }
  footer a:hover { color: var(--accent); }

  @media (max-width: 820px) {
    .steps { grid-template-columns: 1fr 1fr; }
  }
  @media (max-width: 620px) {
    .facts, .steps, .levels-kinds, .sidecar { grid-template-columns: 1fr; }
    .level:nth-child(n) { margin-left: 0; }
  }

  /* Styles for the generated, bilingual review reference. */
  .reference-counts { color: var(--accent); font: 600 14px var(--mono); margin: 0 0 22px; }
  .reference-principles { align-items: start; }
  .reference-principle { min-width: 0; }
  .reference-principle dl, .reference-body dl { margin: 18px 0; }
  .reference-principle dt, .reference-body dt { color: var(--text); font-weight: 600; margin-top: 14px; }
  .reference-principle dd, .reference-body dd { margin: 5px 0 0; color: var(--muted); overflow-wrap: anywhere; }
  .reference-links { margin-top: 18px !important; font-size: .88rem; }
  .reference-prompt { margin-top: 18px; }
  .reference-prompt p + p { margin-top: 14px; }
  .reference-heading { margin: 30px 0 12px; font-size: 1.15rem; }
  .reference-detail { border: 1px solid var(--line); border-radius: var(--radius-md); background: var(--panel); margin: 10px 0; min-width: 0; }
  .reference-detail > summary { cursor: pointer; padding: 16px 18px; color: var(--text); font-weight: 600; overflow-wrap: anywhere; }
  .reference-detail > summary::marker, .reference-examples > summary::marker { color: var(--accent); }
  .reference-detail > summary small { display: block; color: var(--muted); font-size: .85rem; font-weight: 400; margin: 6px 0 0 18px; }
  .reference-detail summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: var(--radius-sm); }
  .reference-body { padding: 0 18px 18px; min-width: 0; overflow-wrap: anywhere; }
  .reference-body p { color: var(--muted); }
  .reference-body a, .reference-provenance a { color: var(--accent); }
  .metric-formula { display: block; background: var(--raise); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 14px; color: var(--text); font: 13px/1.7 var(--mono); white-space: pre-wrap; overflow-wrap: anywhere; }
  .reference-examples > summary { cursor: pointer; color: var(--text); padding: 8px 0; }
  .reference-examples h4 { font-size: .9rem; margin: 14px 0 8px; }
  .reference-examples pre { max-width: 100%; overflow-x: auto; margin: 0; padding: 14px; border-radius: var(--radius-sm); background: var(--raise); color: var(--muted); font: 13px/1.7 var(--mono); }
  .reference-provenance { color: var(--muted); font: 13px/1.8 var(--mono); margin-top: 24px; }
  @media (max-width: 620px) { .reference-library > .reference-body { padding: 0 10px 10px; } }

/* Quality Studio has its own product navigation and blue identity. */
html { scroll-padding-top: 110px; }
.skip-link { position: fixed; z-index: 30; left: 16px; top: -100px; padding: 12px 18px; background: var(--accent); color: var(--bg); }
.skip-link:focus { top: 8px; }
.site-header { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid var(--line); background: rgba(10,14,19,.97); backdrop-filter: blur(8px); }
.site-header .wrap { display: flex; align-items: center; gap: 20px; padding-top: 12px; padding-bottom: 12px; }
.site-brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-size: 17px; font-weight: 700; white-space: nowrap; }
.site-mark { display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 8px; background: var(--accent); color: var(--bg); font-weight: 800; }
.site-nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.site-nav a { padding: 8px 10px; border-radius: 6px; color: var(--muted); font-size: 14px; text-decoration: none; border-bottom: 2px solid transparent; }
.site-nav a[aria-current="page"] { background: var(--panel); border-bottom-color: var(--accent); color: var(--text); }
.site-nav a:hover, .site-nav a:focus-visible { color: var(--accent); }
.site-header a:focus-visible, .page-actions a:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.ecosystem-link { color: var(--muted); font-size: 12px; text-decoration: none; white-space: nowrap; }
.lang { display: flex; border: 1px solid var(--line); border-radius: 7px; overflow: hidden; }
.lang a { padding: 6px 9px; color: var(--muted); font: 12px var(--mono); text-decoration: none; }
.lang a.on { background: var(--panel); color: var(--accent); }
.breadcrumb { color: var(--muted); font-size: 14px; margin: 0 0 22px; }
.breadcrumb a { color: var(--accent); }
.product-hero h1 { max-width: 820px; }
.page-hero { padding: 42px 0 18px; }
.page-hero h1 { font-size: clamp(2rem, 4.4vw, 3.1rem); }
.page-actions { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; margin-top: 24px; }
.page-actions a { color: var(--accent); text-decoration: none; font-size: 14px; }
.page-actions .primary-link { background: var(--accent); color: var(--bg); padding: 12px 16px; border-radius: 8px; font-weight: 700; }
.site-overview-cards { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px; }
.site-overview-cards .fact { min-width: 0; }
.site-overview-cards .card-detail { margin-top: 14px; font-size: .9rem; }
.section-links { padding-left: 18px; margin: 18px 0 0; font-size: .88rem; }
.section-links li { margin: 7px 0; }
.section-links a { color: var(--muted); }
footer strong { color: var(--text); }
@media (max-width: 900px) {
  .site-header .wrap { flex-wrap: wrap; gap: 10px; }
  .site-nav { order: 3; width: 100%; display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); margin: 0; text-align: center; }
  .site-header .lang { margin-left: auto; }
  .ecosystem-link { display: none; }
  .site-overview-cards { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .site-header .wrap { padding: 10px 16px; }
  .site-nav a { padding: 7px 4px; font-size: 13px; }
  .hero { padding-top: 40px; }
  .page-actions { align-items: flex-start; flex-direction: column; }
}

/* Domain status is textual as well as colored. */
.domain-catalog { border-top:1px solid var(--line); margin-top:36px; padding-top:8px; }
.domain-catalog .reference-heading { scroll-margin-top:110px; }
.domain-catalog .reference-body dl { margin:16px 0; }
.domain-check { border-top:1px solid var(--line); padding-top:22px; margin-top:22px; }
.domain-check h4 { font-size:17px; margin:0 0 10px; }
.domain-status { color:var(--accent); font-size:13px; font-weight:650; }
.domain-status[data-status="planned"] { color:var(--muted); }
.domain-applicability { font-size:13px; color:var(--muted); }
.domain-notice { background:var(--panel); border:1px solid var(--line); border-left:3px solid var(--accent); border-radius:8px; padding:20px; margin:24px 0; }
.domain-notice p { font-size:14px; line-height:1.75; }
.domain-properties { display:flex; flex-wrap:wrap; gap:8px; }
.domain-properties code { background:var(--bg); border:1px solid var(--line); border-radius:4px; padding:2px 7px; }
.reference-detail[id] { scroll-margin-top:110px; }