/* Quanta - ivory & graphite with an amber signal colour. All classes carry the qt- prefix. */
:root {
  --qt-bg: #fbf9f3;
  --qt-surface: #ffffff;
  --qt-sunk: #f4f0e6;
  --qt-ink: #23262c;
  --qt-ink-2: #555b64;
  --qt-ink-3: #848a93;
  --qt-line: #e5dfd1;
  --qt-line-2: #d3ccba;
  --qt-amber: #f59e0b;
  --qt-amber-deep: #b86e00;
  --qt-amber-ink: #8a5200;
  --qt-amber-soft: #fdf1d7;
  --qt-good: #2f7d4f;
  --qt-bad: #b3412e;
  --qt-series-0: #f59e0b;
  --qt-series-1: #2f343c;
  --qt-series-2: #8c95a3;
  --qt-shadow: 0 1px 2px rgba(35, 38, 44, 0.06), 0 8px 24px rgba(35, 38, 44, 0.05);
  --qt-radius: 10px;
  --qt-face-display: 'Red Hat Display', 'Segoe UI', system-ui, sans-serif;
  --qt-face-text: 'Red Hat Text', 'Segoe UI', system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --qt-face-mono: 'Red Hat Mono', ui-monospace, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-qt-tone="ivory-day"]) {
    --qt-bg: #15171b; --qt-surface: #1d2025; --qt-sunk: #191b20; --qt-ink: #ece7db; --qt-ink-2: #aca79c; --qt-ink-3: #7f7b73;
    --qt-line: #2e3238; --qt-line-2: #3b4048; --qt-amber-ink: #fbbf4a; --qt-amber-deep: #f59e0b; --qt-amber-soft: #2f2615;
    --qt-good: #5fbf86; --qt-bad: #ef7a64; --qt-series-1: #d8d2c4; --qt-series-2: #7f8a99;
    --qt-shadow: 0 1px 2px rgba(0, 0, 0, 0.3); color-scheme: dark;
  }
}
:root[data-qt-tone="graphite-night"] {
  --qt-bg: #15171b; --qt-surface: #1d2025; --qt-sunk: #191b20; --qt-ink: #ece7db; --qt-ink-2: #aca79c; --qt-ink-3: #7f7b73;
  --qt-line: #2e3238; --qt-line-2: #3b4048; --qt-amber-ink: #fbbf4a; --qt-amber-deep: #f59e0b; --qt-amber-soft: #2f2615;
  --qt-good: #5fbf86; --qt-bad: #ef7a64; --qt-series-1: #d8d2c4; --qt-series-2: #7f8a99;
  --qt-shadow: 0 1px 2px rgba(0, 0, 0, 0.3); color-scheme: dark;
}

html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--qt-bg); color: var(--qt-ink); }
.qt-body, .qt-body *, .qt-body *::before, .qt-body *::after { box-sizing: border-box; }
.qt-body { font-family: var(--qt-face-text); font-size: 16px; line-height: 1.6; min-height: 100vh; display: flex; flex-direction: column; }
.qt-body a { color: var(--qt-amber-ink); text-decoration-thickness: 1px; text-underline-offset: 3px; }
.qt-body a:hover { color: var(--qt-amber-deep); }
.qt-body code, .qt-body pre, .qt-mono { font-family: var(--qt-face-mono); }
.qt-main { flex: 1 0 auto; }
.qt-wrap { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 16px; }
.qt-narrow { max-width: 820px; }

/* header */
.qt-top { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--qt-bg) 92%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--qt-line); }
.qt-top-row { display: flex; align-items: center; gap: 18px; min-height: 62px; flex-wrap: wrap; padding-top: 6px; padding-bottom: 6px; }
.qt-brand { display: inline-flex; align-items: center; gap: 9px; text-decoration: none; color: var(--qt-ink); }
.qt-body .qt-brand { color: var(--qt-ink); text-decoration: none; }
.qt-brand-name { font-family: var(--qt-face-display); font-weight: 800; font-size: 20px; letter-spacing: 0.01em; }
.qt-mark { width: 28px; height: 28px; flex: none; }
.qt-mark-base { fill: var(--qt-ink); }
.qt-mark-a { fill: var(--qt-series-2); }
.qt-mark-b { fill: var(--qt-ink-2); }
.qt-mark-c { fill: var(--qt-amber); }
.qt-nav { display: flex; gap: 4px; flex-wrap: wrap; }
.qt-top-tools { margin-left: auto; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.qt-loc { position: relative; }
.qt-loc > summary { list-style: none; cursor: pointer; padding: 5px 10px; border: 1px solid var(--qt-line-2); border-radius: 7px; font-size: 14px; color: var(--qt-ink-2); }
.qt-loc > summary::-webkit-details-marker { display: none; }
.qt-loc-list { position: absolute; right: 0; top: calc(100% + 6px); background: var(--qt-surface); border: 1px solid var(--qt-line); border-radius: var(--qt-radius); box-shadow: var(--qt-shadow); padding: 6px; display: grid; min-width: 150px; z-index: 30; }
.qt-body .qt-loc-opt { color: var(--qt-ink); text-decoration: none; padding: 6px 10px; border-radius: 6px; font-size: 14px; }
.qt-body .qt-loc-opt:hover, .qt-body .qt-loc-now { background: var(--qt-amber-soft); }
.qt-tone-btn { width: 34px; height: 34px; border-radius: 50%; border: 1px solid var(--qt-line-2); background: transparent; cursor: pointer; display: inline-grid; place-items: center; }
.qt-tone-dot { width: 14px; height: 14px; border-radius: 50%; background: linear-gradient(90deg, var(--qt-ink) 50%, var(--qt-amber) 50%); }
.qt-who { font-size: 14px; color: var(--qt-ink-2); }
.qt-seat { font-style: normal; font-size: 12px; padding: 1px 6px; border-radius: 4px; background: var(--qt-amber-soft); color: var(--qt-amber-ink); margin-left: 4px; }
.qt-body .qt-tool-link { color: var(--qt-ink-2); text-decoration: none; font-size: 14px; font-weight: 500; }
.qt-body .qt-tool-strong { color: var(--qt-ink); }
.qt-inline { display: inline; margin: 0; }
.qt-linkbtn { background: none; border: 0; padding: 0; font: inherit; font-size: 14px; color: var(--qt-ink-2); cursor: pointer; text-decoration: underline; text-underline-offset: 3px; }
.qt-danger { color: var(--qt-bad); }

/* buttons */
.qt-btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 10px 18px; border-radius: 8px; font-family: var(--qt-face-display); font-weight: 700; font-size: 15px; text-decoration: none; cursor: pointer; border: 1px solid transparent; line-height: 1.2; }
.qt-body .qt-btn-amber { background: var(--qt-amber); color: #1d1608; border-color: var(--qt-amber); }
.qt-body .qt-btn-amber:hover { background: #e08e05; color: #1d1608; }
.qt-body .qt-btn-line { background: transparent; color: var(--qt-ink); border-color: var(--qt-line-2); }
.qt-body .qt-btn-line:hover { border-color: var(--qt-ink-2); color: var(--qt-ink); }
.qt-btn-sm { padding: 6px 12px; font-size: 14px; }
.qt-btn-wide { width: 100%; }
.qt-btn[disabled] { opacity: 0.55; cursor: not-allowed; }

/* type */
.qt-h1 { font-family: var(--qt-face-display); font-weight: 800; font-size: clamp(30px, 4.6vw, 52px); line-height: 1.08; letter-spacing: -0.015em; margin: 0 0 14px; }
.qt-h1-sm { font-size: clamp(26px, 3.4vw, 38px); }
.qt-h2 { font-family: var(--qt-face-display); font-weight: 700; font-size: clamp(22px, 2.6vw, 30px); line-height: 1.2; margin: 0 0 8px; }
.qt-h3 { font-family: var(--qt-face-display); font-weight: 700; font-size: 19px; margin: 0 0 8px; }
.qt-h4 { font-family: var(--qt-face-display); font-weight: 700; font-size: 15px; margin: 18px 0 6px; color: var(--qt-ink-2); }
.qt-kicker { font-family: var(--qt-face-mono); font-size: 13px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--qt-amber-ink); margin: 0 0 12px; }
.qt-lede { font-size: 18px; color: var(--qt-ink-2); margin: 0; max-width: 62ch; }
.qt-muted { color: var(--qt-ink-2); }
.qt-fine { font-size: 13.5px; color: var(--qt-ink-3); }
.qt-num { text-align: right; font-family: var(--qt-face-mono); font-variant-numeric: tabular-nums; white-space: nowrap; }
.qt-num-em { color: var(--qt-amber-ink); font-weight: 500; }
.qt-neg { color: var(--qt-bad); }
.qt-pos { color: var(--qt-good); }

/* hero: the usage-scale chart is the main visual */
.qt-hero { padding: 44px 0 26px; }
.qt-hero-head { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 24px 40px; align-items: end; margin-bottom: 26px; }
.qt-hero-cta { display: flex; gap: 10px; flex-wrap: wrap; }
.qt-panel { background: var(--qt-surface); border: 1px solid var(--qt-line); border-radius: var(--qt-radius); box-shadow: var(--qt-shadow); }
.qt-pad { padding: 20px; margin: 0 0 20px; }
.qt-scale { margin: 0; padding: 18px 20px 14px; }
.qt-scale-cap { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; border-bottom: 1px dashed var(--qt-line-2); padding-bottom: 10px; margin-bottom: 12px; }
.qt-scale-title { font-family: var(--qt-face-display); font-weight: 700; }
.qt-scale-y { font-family: var(--qt-face-mono); font-size: 12.5px; color: var(--qt-ink-3); }
.qt-scale-grid { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); gap: 22px; align-items: start; }
.qt-chart { width: 100%; height: auto; display: block; }
.qt-ch-grid { stroke: var(--qt-line); stroke-width: 1; }
.qt-ch-tick { stroke: var(--qt-line-2); }
.qt-ch-ytick { fill: var(--qt-ink-3); font-family: var(--qt-face-mono); font-size: 11px; text-anchor: end; }
.qt-ch-xtick { fill: var(--qt-ink-2); font-family: var(--qt-face-mono); font-size: 12px; text-anchor: middle; }
.qt-ch-axis { fill: var(--qt-ink-3); font-size: 12px; text-anchor: middle; }
.qt-ch-line { fill: none; stroke-width: 2.5; stroke-linejoin: round; }
.qt-ch-dot { stroke: var(--qt-surface); stroke-width: 2; }
.qt-ch-line.qt-ch-s0 { stroke: var(--qt-series-0); }
.qt-ch-line.qt-ch-s1 { stroke: var(--qt-series-1); }
.qt-ch-line.qt-ch-s2 { stroke: var(--qt-series-2); stroke-dasharray: 6 4; }
.qt-ch-dot.qt-ch-s0 { fill: var(--qt-series-0); }
.qt-ch-dot.qt-ch-s1 { fill: var(--qt-series-1); }
.qt-ch-dot.qt-ch-s2 { fill: var(--qt-series-2); }
.qt-legend { list-style: none; display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 8px 0 0; padding: 0; font-size: 14px; }
.qt-legend-item { display: inline-flex; align-items: center; gap: 7px; }
.qt-swatch { width: 18px; height: 4px; border-radius: 2px; display: inline-block; }
.qt-swatch.qt-ch-s0 { background: var(--qt-series-0); }
.qt-swatch.qt-ch-s1 { background: var(--qt-series-1); }
.qt-swatch.qt-ch-s2 { background: var(--qt-series-2); }
.qt-side-h { font-family: var(--qt-face-mono); font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--qt-ink-3); margin: 0 0 8px; }
.qt-scale-note { font-size: 13px; color: var(--qt-ink-3); margin: 12px 0 0; border-top: 1px dashed var(--qt-line-2); padding-top: 10px; }

/* tables */
.qt-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 0 0 12px; }
.qt-table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.qt-table th { text-align: left; font-weight: 600; font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--qt-ink-3); padding: 10px 12px; border-bottom: 1px solid var(--qt-line-2); white-space: nowrap; }
.qt-table td { padding: 10px 12px; border-bottom: 1px solid var(--qt-line); vertical-align: top; }
.qt-table .qt-num { text-align: right; }
.qt-rowhead { text-transform: none; letter-spacing: 0; font-size: 14px; color: var(--qt-ink); font-family: var(--qt-face-mono); }
.qt-readout td, .qt-readout th { padding: 8px 6px; }
.qt-model-name { display: block; font-weight: 600; }
.qt-model-id { font-size: 12.5px; color: var(--qt-ink-3); }
.qt-row-dim td { opacity: 0.55; }

/* sections */
.qt-band { padding: 46px 0; }
.qt-band-alt { background: var(--qt-sunk); border-top: 1px solid var(--qt-line); border-bottom: 1px solid var(--qt-line); }
.qt-sec-head { margin-bottom: 18px; max-width: 70ch; }
.qt-split { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: 36px; align-items: start; }
.qt-env { margin: 0; display: grid; gap: 0; border-top: 1px solid var(--qt-line); }
.qt-env-row { display: grid; grid-template-columns: minmax(150px, 0.8fr) minmax(0, 1.2fr); gap: 16px; padding: 11px 0; border-bottom: 1px solid var(--qt-line); }
.qt-env-row dt { font-weight: 600; }
.qt-env-row dd { margin: 0; color: var(--qt-ink-2); overflow-wrap: anywhere; }

/* pages */
.qt-page { padding: 38px 0 50px; }
.qt-page-head { margin-bottom: 22px; }
.qt-docs .qt-doc-sec { margin: 0 0 34px; }
.qt-code { background: #1f2227; color: #f1ece0; border-radius: 8px; padding: 14px 16px; overflow-x: auto; font-size: 13.5px; line-height: 1.55; margin: 10px 0 14px; }
.qt-callout { border-left: 3px solid var(--qt-amber); background: var(--qt-amber-soft); padding: 10px 14px; border-radius: 0 8px 8px 0; }
.qt-idlist { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; }
.qt-idlist code { background: var(--qt-sunk); border: 1px solid var(--qt-line); padding: 3px 8px; border-radius: 6px; font-size: 13.5px; }
.qt-term { margin: 0 0 22px; }
.qt-term p { color: var(--qt-ink-2); }

/* briefings */
.qt-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 22px; }
.qt-body .qt-chip { text-decoration: none; color: var(--qt-ink-2); border: 1px solid var(--qt-line-2); border-radius: 999px; padding: 5px 12px; font-size: 14px; }
.qt-body .qt-chip-on { background: var(--qt-ink); color: var(--qt-bg); border-color: var(--qt-ink); }
.qt-chip-n { font-family: var(--qt-face-mono); font-size: 12px; opacity: 0.75; }
.qt-briefs { list-style: none; padding: 0; margin: 0 0 26px; }
.qt-brief { padding: 16px 0; border-bottom: 1px solid var(--qt-line); }
.qt-brief-meta { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; font-size: 13px; color: var(--qt-ink-3); margin: 0 0 4px; }
.qt-body .qt-tag { color: var(--qt-amber-ink); text-decoration: none; font-weight: 600; }
.qt-brief-title { font-family: var(--qt-face-display); font-size: 20px; margin: 0 0 4px; line-height: 1.3; }
.qt-body .qt-brief-title a { color: var(--qt-ink); text-decoration: none; }
.qt-prose { font-size: 17px; }
.qt-prose p, .qt-prose li { color: var(--qt-ink); }
.qt-prose ul, .qt-prose ol { list-style: none; padding-left: 4px; }
.qt-art-h2 { font-family: var(--qt-face-display); font-size: 24px; margin: 30px 0 10px; }
.qt-art-h3 { font-family: var(--qt-face-display); font-size: 19px; margin: 22px 0 8px; }
.qt-related { margin-top: 34px; }
.qt-cta-box { margin-top: 26px; }
.qt-back { font-size: 14px; }

/* forms */
.qt-form { display: grid; gap: 14px; margin: 0 0 16px; }
.qt-form-row { grid-auto-flow: column; justify-content: start; align-items: end; }
.qt-field { display: grid; gap: 5px; }
.qt-field > span { font-weight: 600; font-size: 14px; }
.qt-field small { color: var(--qt-ink-3); font-size: 12.5px; }
.qt-body input, .qt-body select, .qt-body textarea { font: inherit; color: var(--qt-ink); background: var(--qt-surface); border: 1px solid var(--qt-line-2); border-radius: 8px; padding: 9px 11px; min-width: 0; max-width: 100%; }
.qt-body input:focus, .qt-body select:focus, .qt-body textarea:focus { outline: 2px solid var(--qt-amber); outline-offset: 1px; border-color: var(--qt-amber); }
.qt-off { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.qt-auth { display: grid; place-items: center; }
.qt-auth-card { width: 100%; max-width: 460px; padding: 28px; }
.qt-bonus, .qt-invited { background: var(--qt-amber-soft); color: var(--qt-amber-ink); padding: 8px 12px; border-radius: 8px; font-weight: 600; }
.qt-work-state { font-size: 13px; color: var(--qt-ink-3); margin: 0; }
.qt-flash { padding: 10px 14px; border-radius: 8px; margin: 0 0 16px; }
.qt-flash-ok { background: color-mix(in srgb, var(--qt-good) 12%, transparent); color: var(--qt-good); }
.qt-flash-bad { background: color-mix(in srgb, var(--qt-bad) 12%, transparent); color: var(--qt-bad); }
.qt-fieldset { border: 1px solid var(--qt-line); border-radius: var(--qt-radius); padding: 14px 16px; display: grid; gap: 10px; }
.qt-fieldset legend { font-weight: 700; padding: 0 6px; }
.qt-inline-grid { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.qt-in-num { width: 74px; }

/* console */
.qt-console { display: grid; grid-template-columns: 210px minmax(0, 1fr); gap: 30px; padding-top: 28px; padding-bottom: 46px; }
.qt-side-title { font-family: var(--qt-face-mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--qt-ink-3); margin: 0 0 8px; }
.qt-side-nav { display: grid; gap: 2px; position: sticky; top: 80px; }
.qt-body .qt-side-link { color: var(--qt-ink-2); text-decoration: none; padding: 8px 12px; border-radius: 8px; font-weight: 500; }
.qt-body .qt-side-link:hover { background: var(--qt-sunk); color: var(--qt-ink); }
.qt-body .qt-side-on { background: var(--qt-amber-soft); color: var(--qt-amber-ink); }
.qt-badge { background: var(--qt-amber); color: #1d1608; border-radius: 999px; font-size: 12px; padding: 0 7px; font-weight: 700; }
.qt-pane { min-width: 0; }
.qt-pane > section { margin-bottom: 22px; }
.qt-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 14px; margin: 0 0 20px; }
.qt-stat { background: var(--qt-surface); border: 1px solid var(--qt-line); border-radius: var(--qt-radius); padding: 14px 16px; }
.qt-stat-k { margin: 0; font-size: 13px; color: var(--qt-ink-3); }
.qt-stat-v { margin: 4px 0 0; font-family: var(--qt-face-mono); font-size: 22px; font-weight: 500; }
.qt-stat-warn .qt-stat-v { color: var(--qt-bad); }
.qt-stat-good .qt-stat-v { color: var(--qt-good); }
.qt-bars { display: flex; align-items: flex-end; gap: 5px; height: 150px; padding: 8px 0; border-bottom: 1px solid var(--qt-line-2); }
.qt-bar { flex: 1; background: var(--qt-amber); border-radius: 3px 3px 0 0; min-height: 2px; opacity: 0.88; }
.qt-bar:hover { opacity: 1; }
.qt-ln-area { fill: var(--qt-amber-soft); }
.qt-ln-path { fill: none; stroke: var(--qt-amber); stroke-width: 2.2; stroke-linejoin: round; }
.qt-ln-dot { fill: var(--qt-surface); stroke: var(--qt-amber-deep); stroke-width: 1.6; }
.qt-share-bar { display: inline-block; width: 120px; max-width: 40vw; height: 8px; background: var(--qt-sunk); border-radius: 4px; vertical-align: middle; overflow: hidden; }
.qt-share-bar > span { display: block; height: 100%; background: var(--qt-amber); }
.qt-quick { display: flex; gap: 8px; flex-wrap: wrap; }
.qt-copy { display: inline-flex; align-items: center; gap: 6px; max-width: 100%; }
.qt-copy-val { font-size: 13px; background: var(--qt-sunk); border: 1px solid var(--qt-line); border-radius: 6px; padding: 2px 7px; overflow-wrap: anywhere; }
.qt-copy-key .qt-copy-val { font-size: 12px; }
.qt-copy-btn { font: inherit; font-size: 12.5px; border: 1px solid var(--qt-line-2); background: transparent; color: var(--qt-ink-2); border-radius: 6px; padding: 2px 8px; cursor: pointer; }
.qt-pill { display: inline-block; font-size: 12.5px; padding: 1px 8px; border-radius: 999px; background: var(--qt-sunk); color: var(--qt-ink-2); font-style: normal; }
.qt-pill-on { background: color-mix(in srgb, var(--qt-good) 14%, transparent); color: var(--qt-good); }
.qt-pill-off { background: color-mix(in srgb, var(--qt-bad) 12%, transparent); color: var(--qt-bad); }
.qt-pill-wait { background: var(--qt-amber-soft); color: var(--qt-amber-ink); }
.qt-threads { list-style: none; padding: 0; margin: 0; }
.qt-thread { border: 1px solid var(--qt-line); border-radius: var(--qt-radius); padding: 14px 16px; margin: 0 0 12px; background: var(--qt-surface); }
.qt-thread-meta { margin: 0 0 4px; font-size: 13px; color: var(--qt-ink-3); }
.qt-thread-body { margin: 0 0 8px; white-space: pre-wrap; }
.qt-thread-reply { border-left: 3px solid var(--qt-amber); padding-left: 12px; margin-top: 8px; }

/* mega-nav dropdowns (details/summary, no script needed) */
.qt-mega { position: relative; }
.qt-mega-head { list-style: none; cursor: pointer; padding: 6px 10px; border-radius: 7px; font-weight: 500; color: var(--qt-ink-2); user-select: none; }
.qt-mega-head::-webkit-details-marker { display: none; }
.qt-mega[open] > .qt-mega-head, .qt-mega-head:hover, .qt-mega-on > .qt-mega-head { color: var(--qt-ink); background: var(--qt-sunk); }
.qt-mega-panel { position: absolute; left: 0; top: calc(100% + 6px); min-width: 210px; background: var(--qt-surface); border: 1px solid var(--qt-line); border-radius: var(--qt-radius); box-shadow: var(--qt-shadow); padding: 8px; display: grid; gap: 2px; z-index: 30; }
.qt-body .qt-mega-link { color: var(--qt-ink); text-decoration: none; padding: 8px 10px; border-radius: 6px; font-size: 14.5px; }
.qt-body .qt-mega-link:hover { background: var(--qt-amber-soft); color: var(--qt-amber-ink); }
.qt-loc-head { display: inline-flex; align-items: center; gap: 6px; }
.qt-globe { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.6; }
.qt-loc-code { font-family: var(--qt-face-mono); font-size: 12.5px; }
.qt-body .qt-textlink { color: var(--qt-ink); font-weight: 600; text-decoration: underline; text-decoration-color: var(--qt-amber); text-underline-offset: 4px; }

/* home: operating notes, catalogue by vendor, company billing */
.qt-notes { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.qt-note { background: var(--qt-surface); border: 1px solid var(--qt-line); border-top: 3px solid var(--qt-amber); border-radius: 0 0 var(--qt-radius) var(--qt-radius); padding: 16px 18px; }
.qt-note p { margin: 0; color: var(--qt-ink-2); font-size: 15px; }
.qt-note .qt-note-n { font-family: var(--qt-face-mono); font-size: 12.5px; color: var(--qt-ink-3); margin-bottom: 6px; }
.qt-vendors { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-bottom: 16px; }
.qt-vendor { border: 1px solid var(--qt-line); border-radius: var(--qt-radius); background: var(--qt-surface); padding: 14px 16px; }
.qt-vendor-h { font-family: var(--qt-face-display); font-size: 17px; margin: 0 0 8px; display: flex; justify-content: space-between; gap: 8px; align-items: baseline; }
.qt-vendor-n { font-family: var(--qt-face-mono); font-size: 12px; color: var(--qt-ink-3); font-weight: 400; }
.qt-vendor-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.qt-vendor-list li { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 0 10px; border-top: 1px dashed var(--qt-line); padding-top: 8px; }
.qt-vendor-list .qt-model-id { grid-column: 1; }
.qt-vendor-list .qt-num { grid-column: 2; grid-row: 1 / span 2; align-self: center; font-size: 13.5px; }
.qt-corp { display: flex; justify-content: space-between; align-items: center; gap: 22px; flex-wrap: wrap; }
.qt-corp-act { display: grid; gap: 8px; justify-items: start; margin: 0; }

/* catalog, pricing notes, docs */
.qt-cat-group { margin: 0 0 30px; }
.qt-numlist { margin: 0; padding-left: 20px; display: grid; gap: 6px; color: var(--qt-ink-2); }
.qt-pricenotes { margin-top: 22px; }
.qt-doc-part { margin: 0 0 40px; padding-top: 6px; }
.qt-doc-part > .qt-h3 { margin-top: 26px; }

/* briefings magazine grid */
.qt-mag { display: grid; gap: 22px; margin-bottom: 26px; }
.qt-mag-lead { border: 1px solid var(--qt-line-2); border-radius: var(--qt-radius); padding: 22px 24px; background: linear-gradient(135deg, var(--qt-amber-soft), var(--qt-surface) 65%); }
.qt-mag-feature .qt-brief-title { font-size: clamp(22px, 2.8vw, 30px); }
.qt-mag-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.qt-mag-card { border: 1px solid var(--qt-line); border-radius: var(--qt-radius); padding: 16px 18px; background: var(--qt-surface); }
.qt-mag-card .qt-brief-title { font-size: 17px; }
.qt-mag-card .qt-muted { font-size: 14.5px; margin: 0; }

/* registration: form with a company-billing side note */
.qt-reg { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 28px; align-items: start; max-width: 1000px; }
.qt-reg-side { display: grid; gap: 14px; padding-top: 62px; }
.qt-pair { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 12px; }

/* console: collapsible grouped sidebar + breadcrumbs */
.qt-side-group { margin: 0 0 8px; }
.qt-side-group-h { list-style: none; cursor: pointer; font-family: var(--qt-face-mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--qt-ink-3); padding: 6px 12px; }
.qt-side-group-h::-webkit-details-marker { display: none; }
.qt-side-links { display: grid; gap: 2px; }
.qt-crumbs { display: flex; flex-wrap: wrap; gap: 6px; font-size: 13px; color: var(--qt-ink-3); margin: 0 0 8px; }
.qt-body .qt-crumbs a { color: var(--qt-ink-2); text-decoration: none; }
.qt-crumb-sep { color: var(--qt-line-2); }
.qt-crumb-now { color: var(--qt-ink); }

/* footer */
.qt-foot { border-top: 1px solid var(--qt-line); background: var(--qt-sunk); padding: 36px 0 26px; margin-top: 20px; }
.qt-foot-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 26px; }
.qt-foot-col { display: grid; gap: 6px; align-content: start; }
.qt-foot-h { font-family: var(--qt-face-mono); font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; color: var(--qt-ink-3); margin: 0 0 4px; font-weight: 500; }
.qt-body .qt-foot-col a { color: var(--qt-ink-2); text-decoration: none; font-size: 14.5px; }
.qt-body .qt-foot-col a:hover { color: var(--qt-ink); }
.qt-foot-copy { font-size: 13px; color: var(--qt-ink-3); margin: 22px 0 0; padding-top: 14px; border-top: 1px solid var(--qt-line); display: flex; flex-wrap: wrap; gap: 6px 18px; justify-content: space-between; }

@media (max-width: 900px) {
  .qt-hero-head, .qt-scale-grid, .qt-split { grid-template-columns: minmax(0, 1fr); }
  .qt-notes, .qt-mag-grid, .qt-vendors, .qt-reg, .qt-pair { grid-template-columns: minmax(0, 1fr); }
  .qt-reg-side { padding-top: 0; }
  .qt-mega-panel { position: static; box-shadow: none; margin-top: 4px; }
  .qt-foot-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .qt-console { grid-template-columns: minmax(0, 1fr); gap: 16px; }
  .qt-side-nav { position: static; grid-auto-flow: column; grid-auto-columns: max-content; overflow-x: auto; }
  .qt-form-row { grid-auto-flow: row; }
}
@media (max-width: 560px) {
  .qt-top-row { gap: 8px; }
  .qt-top-tools { margin-left: 0; width: 100%; }
  .qt-foot-grid { grid-template-columns: minmax(0, 1fr); }
  .qt-env-row { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .qt-hero { padding-top: 28px; }
}
/* narrow screens: chart text scales with the viewBox, so give it room; ids never wrap */
.qt-table code, .qt-model-id, .qt-copy-val { white-space: nowrap; }
@media (max-width: 560px) {
  .qt-ln .qt-ch-ytick { font-size: 19px; }
  .qt-ln .qt-ch-xtick { font-size: 20px; }
  .qt-chart:not(.qt-ln) .qt-ch-ytick, .qt-chart:not(.qt-ln) .qt-ch-xtick, .qt-chart:not(.qt-ln) .qt-ch-axis { font-size: 18px; }
}
@media (prefers-reduced-motion: reduce) {
  .qt-body * { transition: none; animation: none; }
}