/* HaoQuantX marketing/static page shared theme (landing/terms/privacy/help/status/blog)*/
:root {
  color-scheme: dark;
  --bg: #0A0E17; --panel: #111722; --panel2: #171E2A; --panel3: #0C121C;
  --line: #273241; --line2: #637083; --text: #F7F5F0; --muted: #B8C2CC;
  --faint: #8291A8; --accent: #C8A868; --accent-hover: #D6B978; --accent-fg: #0A0E17;
  --green: #2AC98F; --red: #F16472; --amber: #F2B84B;
  --success-border: rgba(42, 201, 143, .45); --success-bg: rgba(42, 201, 143, .08);
  --danger-border: rgba(241, 100, 114, .45); --danger-subtle: rgba(241, 100, 114, .10);
  --warning-border: rgba(242, 184, 75, .48); --warning-bg: rgba(242, 184, 75, .10);
  --focus-ring: #C8A868; --image-stage: #EEF3F7; --menu-shadow: 0 12px 24px rgba(0, 0, 0, .34);
  --font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "SFMono-Regular", "Cascadia Code", "Roboto Mono", Menlo, Consolas, monospace;
  --sans: var(--font-sans); --mono: var(--font-mono);
  --text-secondary: var(--muted); --text-tertiary: var(--faint);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text);
  font-family: var(--sans); font-size: 16px; line-height: 1.7; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
:where(a, button, input, select, textarea):focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
.wrap { max-width: 840px; margin: 0 auto; padding: 0 24px; }

/* Top bar*/
header { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 10px; position: relative;
  padding: 20px 0; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 8px; font-family: var(--mono); font-weight: 600; letter-spacing: 0; color: var(--text); font-size: 17px; }
.brand-icon { display: block; width: 28px; height: 28px; border-radius: 7px; object-fit: cover; }
.brand .dot { color: var(--accent); }
.nav { display: flex; gap: 14px; flex-wrap: wrap; font-size: 13px; }
.nav a { color: var(--muted); }
.nav a:hover { color: var(--text); }
.nav-toggle { display: none; align-items: center; justify-content: center; width: 44px; height: 44px;
  padding: 0; border: 1px solid var(--line2); border-radius: 6px; background: var(--panel2);
  color: var(--text); font-size: 22px; line-height: 1; cursor: pointer; }
.nav-toggle:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }
[hidden] { display: none !important; }
.lang-switch { background: var(--panel2); border: 1px solid var(--line2); color: var(--text);
  border-radius: 6px; padding: 4px 8px; font-size: 13px; cursor: pointer; width: 112px; }

/* UX-07 theme switch (light / dark / follow system). Presentational only: the state lives on
   <html data-theme> and in localStorage so the console keeps its own controls untouched. */
.theme-switch { display: inline-flex; flex-wrap: wrap; align-items: stretch;
  border: 1px solid var(--line2); border-radius: 6px; background: var(--panel2); overflow: hidden; }
.theme-option { display: inline-flex; align-items: center; justify-content: center;
  min-height: 34px; padding: 4px 10px; border: 0; border-left: 1px solid var(--line);
  background: transparent; color: var(--muted); font-family: inherit; font-size: 13px; cursor: pointer; }
.theme-option:first-child { border-left: 0; }
.theme-option:not([aria-checked="true"]):hover { color: var(--text); }
.theme-option[aria-checked="true"] { background: var(--accent); color: var(--accent-fg); }
.theme-option:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: -2px; }

/* Content*/
main { padding: 40px 0; }
h1 { font-size: 30px; margin: 0 0 12px; font-weight: 700; letter-spacing: 0; }
h2 { font-size: 20px; margin: 34px 0 12px; font-weight: 700; }
h3 { font-size: 16px; margin: 20px 0 8px; font-weight: 600; }
p, li { color: var(--muted); }
.lead { color: var(--muted); font-size: 16px; margin: 0 0 8px; }
.muted { color: var(--faint); font-size: 13px; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 20px; margin: 14px 0; }
.card h3 { margin-top: 0; }
.badge { display: inline-block; font-size: 13px; padding: 2px 10px; border-radius: 20px;
  border: 1px solid var(--line2); color: var(--muted); font-family: var(--mono); }
.badge.ok { color: var(--green); border-color: var(--success-border); background: var(--success-bg); }
.badge.warn { color: var(--amber); border-color: var(--warning-border); background: var(--warning-bg); }
.badge.err { color: var(--red); border-color: var(--danger-border); background: var(--danger-subtle); }

/* Status page grid*/
.status-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; margin: 16px 0; }
.status-cell { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 16px; }
.status-cell .k { color: var(--faint); font-size: 13px; font-family: var(--mono); }
.status-cell .v { color: var(--text); font-size: 20px; font-weight: 600; margin-top: 4px; }
.status-headline { display: flex; align-items: center; gap: 10px; min-height: 38px; margin-top: 18px; }
.status-headline strong { color: var(--text); font-size: 17px; }
.status-incidents { margin-top: 28px; padding: 0; border: 0; }
.status-incidents h2 { font-size: 18px; margin-bottom: 10px; }
.status-incident-active { border-color: var(--amber); color: var(--text); }
.status-detail { display:block; margin-top:6px; color:var(--muted); font-size:13px; line-height:1.45; font-weight:400; }
.status-availability { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.status-availability-item { display: grid; gap: 4px; min-width: 0; padding: 16px; background: var(--panel); border: 1px solid var(--line); border-radius: 8px; }
.status-availability-item span { color: var(--green); font-family: var(--mono); font-size: 17px; }
.status-availability-item small { color: var(--faint); }
.status-component-availability { display: grid; gap: 2px; margin-top: 6px; padding-top: 6px; border-top: 1px solid var(--line); }
.status-component-availability span { display: flex; justify-content: space-between; gap: 8px; color: var(--muted); font-family: var(--sans); font-size: 13px; }
.status-component-availability b { color: var(--text); font-family: var(--mono); font-weight: 500; }
.status-record-list .card { margin: 10px 0; }
.status-record-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.status-record-head strong { min-width: 0; overflow-wrap: anywhere; }
.status-subscription-form { display: grid; grid-template-columns: 130px minmax(0, 1fr); gap: 10px 12px; align-items: center; }
.status-subscription-form label { color: var(--muted); font-size: 13px; }
.status-subscription-form input, .status-subscription-form select { width: 100%; min-height: 42px; padding: 8px 10px; color: var(--text); background: var(--panel3); border: 1px solid var(--line2); border-radius: 6px; font: inherit; }
.status-subscription-form button { grid-column: 2; min-height: 42px; padding: 8px 14px; color: var(--accent-fg); background: var(--accent); border: 0; border-radius: 6px; font: inherit; font-weight: 700; cursor: pointer; }
.status-subscription-form button:disabled { cursor: wait; opacity: .65; }
.status-subscription-form p { grid-column: 2; margin: 0; overflow-wrap: anywhere; }

/* Task-oriented help center */
.help-version { margin: 5px 0 18px; color: var(--faint); font-family: var(--mono); font-size: 13px; }
.help-product-shot { margin: 18px 0 24px; }
.help-product-shot img { display: block; width: 100%; height: auto; aspect-ratio: 1440 / 1105;
  object-fit: contain; border: 1px solid var(--line2); border-radius: 6px; background: var(--image-stage); }
.help-product-shot figcaption { margin-top: 7px; color: var(--faint); font-size: 13px; }
.help-search { margin: 24px 0 14px; }
.help-search label { display: block; margin-bottom: 7px; color: var(--text); font-weight: 600; }
.help-search input { width: 100%; min-height: 44px; padding: 10px 12px; color: var(--text);
  background: var(--panel3); border: 1px solid var(--line2); border-radius: 6px; font: inherit; }
.help-search input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.help-search .muted { min-height: 22px; margin: 5px 0 0; }
.help-toc { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 28px; }
.help-toc a { padding: 6px 9px; border: 1px solid var(--line); border-radius: 4px;
  color: var(--muted); background: var(--panel3); font-size: 13px; }
.help-toc a:hover { color: var(--text); border-color: var(--line2); text-decoration: none; }
.help-group { margin-top: 34px; }
.help-group > h2 { margin-bottom: 14px; }
.help-article { scroll-margin-top: 16px; padding: 20px 0 24px; border-top: 1px solid var(--line); }
.help-article:last-child { border-bottom: 1px solid var(--line); }
.help-article h3 { margin: 0; font-size: 18px; }
.help-article h4 { margin: 18px 0 7px; color: var(--text); font-size: 14px; }
.help-article ol { margin: 8px 0 16px; padding-left: 22px; }
.help-article p { margin: 7px 0; }
.help-article b { color: var(--text); }
.help-article-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; }
.help-updated { flex: 0 0 auto; color: var(--faint); font-size: 13px; font-family: var(--mono); }
.help-facts { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 14px 0; }
.help-facts > div { padding: 12px; border-left: 2px solid var(--line2); background: var(--panel3); }
.help-facts p { margin: 3px 0 0; font-size: 14px; }
.error-index { display: grid; gap: 0; margin: 16px 0; border-top: 1px solid var(--line); }
.error-index > div { display: grid; grid-template-columns: minmax(220px, .8fr) minmax(0, 1.7fr);
  gap: 16px; padding: 13px 0; border-bottom: 1px solid var(--line); }
.error-index dt, .error-index dd { min-width: 0; margin: 0; }
.error-index code { color: var(--accent); font-family: var(--mono); font-size: 13px; overflow-wrap: anywhere; }
.error-index dd { color: var(--muted); font-size: 14px; }

/* Public legal profile populated only from verified deployment configuration. */
.legal-profile { margin-top: 34px; }
.legal-profile[hidden], .legal-details > div[hidden] { display: none; }
.legal-details { margin: 14px 0 0; border-top: 1px solid var(--line); }
.legal-details > div { display: grid; grid-template-columns: minmax(150px, .55fr) minmax(0, 1.45fr);
  gap: 18px; padding: 13px 0; border-bottom: 1px solid var(--line); }
.legal-details dt, .legal-details dd { min-width: 0; margin: 0; }
.legal-details dt { color: var(--faint); font-size: 13px; }
.legal-details dd { color: var(--text); overflow-wrap: anywhere; }
.legal-details a { color: var(--accent); }

/* Blog post*/
.post { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: 22px; margin: 16px 0; }
.post h3 { margin-top: 0; }
.post h2 { margin: 8px 0 14px; font-size: 22px; }
.post h2 a, .post h3 a { color: var(--text); }
.post .date { color: var(--faint); font-size: 13px; font-family: var(--mono); }

/* FAQ */
details { border: 1px solid var(--line); border-radius: 8px; padding: 12px 16px; margin: 8px 0; background: var(--panel); }
details summary { cursor: pointer; font-weight: 600; color: var(--text); }
details p { margin: 10px 0 0; }

footer { border-top: 1px solid var(--line); padding: 24px 0 40px; color: var(--faint); font-size: 13px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
footer .links { display: flex; gap: 14px; flex-wrap: wrap; }
footer .links a { color: var(--faint); }
footer .links a:hover { color: var(--text); }

/* UX-07: the operating-system preference is the follow-system default. An explicit choice has to
   win on the opposite OS setting too, so the manual branch repeats the light palette below.
   tests/frontend/style_contrast.test.js fails if the two light palettes ever drift apart. */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
    --bg: #F5F7F8; --panel: #FFFFFF; --panel2: #EEF1F3; --panel3: #E5E9EC;
    --line: #D0D6DB; --line2: #7A8791; --text: #15202B; --muted: #465461;
    --faint: #5B6874; --accent: #87610F; --accent-hover: #76570B; --accent-fg: #FFFFFF;
    --green: #087A55; --red: #B4232D; --amber: #8B5F00;
    --success-border: rgba(8, 122, 85, .38); --success-bg: rgba(8, 122, 85, .08);
    --danger-border: rgba(180, 35, 45, .42); --danger-subtle: rgba(180, 35, 45, .10);
    --warning-border: rgba(139, 95, 0, .45); --warning-bg: rgba(139, 95, 0, .10);
    --focus-ring: #8D6817; --menu-shadow: 0 12px 24px rgba(28, 42, 54, .16);
  }
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #F5F7F8; --panel: #FFFFFF; --panel2: #EEF1F3; --panel3: #E5E9EC;
  --line: #D0D6DB; --line2: #7A8791; --text: #15202B; --muted: #465461;
  --faint: #5B6874; --accent: #87610F; --accent-hover: #76570B; --accent-fg: #FFFFFF;
  --green: #087A55; --red: #B4232D; --amber: #8B5F00;
  --success-border: rgba(8, 122, 85, .38); --success-bg: rgba(8, 122, 85, .08);
  --danger-border: rgba(180, 35, 45, .42); --danger-subtle: rgba(180, 35, 45, .10);
  --warning-border: rgba(139, 95, 0, .45); --warning-bg: rgba(139, 95, 0, .10);
  --focus-ring: #8D6817; --menu-shadow: 0 12px 24px rgba(28, 42, 54, .16);
}

@media (max-width: 640px) {
  h1 { font-size: 24px; }
  .status-grid { grid-template-columns: 1fr 1fr; }
  .status-availability { grid-template-columns: 1fr; }
  .status-subscription-form { grid-template-columns: 1fr; }
  .status-subscription-form button, .status-subscription-form p { grid-column: 1; }
  header { flex-wrap: wrap; gap: 6px; }
  .brand { gap: 6px; font-size: 13px; }
  .nav-toggle { display: inline-flex; margin-left: auto; flex: 0 0 44px; }
  .lang-switch { width: 88px; max-width: 88px; min-height: 44px; }
  .theme-switch { order: 3; flex: 1 0 100%; }
  .theme-option { flex: 1 1 0; min-height: 44px; }
  .nav { display: none; position: absolute; top: calc(100% + 1px); left: 0; right: 0; z-index: 20;
    padding: 10px; flex-direction: column; gap: 2px; background: var(--panel);
    border: 1px solid var(--line2); border-radius: 0 0 6px 6px; box-shadow: var(--menu-shadow); }
  .nav.open { display: flex; }
  .nav a { display: flex; align-items: center; min-height: 44px; padding: 8px 10px; }
  .help-toc { display: grid; grid-template-columns: 1fr 1fr; }
  .help-article-head { display: block; }
  .help-updated { display: block; margin-top: 4px; }
  .help-facts { grid-template-columns: 1fr; }
  .error-index > div { grid-template-columns: 1fr; gap: 5px; }
  .legal-details > div { grid-template-columns: 1fr; gap: 5px; }
}