/* QuantBase design system v2 — "Horizon". Spec: DESIGN-SYSTEM-V2.md.
   One file for the site, the console and the server-rendered pages.
   Token NAMES are the site's (tape.css); console names are aliases.
   Components are qb- prefixed so they never collide with existing classes.
   Motion lives only inside (prefers-reduced-motion: no-preference). */

@layer base, components;

/* ---------- tokens: dark (default) ---------- */
:root {
  color-scheme: dark;
  --ground: #070A10; --surface: #0E1119; --raised: #151A24; --sunk: #0A0D14; --hover: #1A2030;
  --line: #1B2130; --line-2: #283044; --line-glow: rgba(255,107,26,.16);
  --text: #F4F1EC; --soft: #C9C5D1; --muted: #9590A0; --dim: #6E6A78;
  --accent: #FF6B1A; --accent-2: #FFB27A; --accent-ink: #FF8A47; --on-accent: #140803; --on-loss: #1A0408; --orange: #E2470F;
  --gain: #3BD9A0; --loss: #FF5D73; --warn: #F6C453; --info: #7FA6FF; --flat: var(--muted);
  --gain-bg: rgba(59,217,160,.12); --loss-bg: rgba(255,93,115,.12); --warn-bg: rgba(246,196,83,.12); --info-bg: rgba(127,166,255,.12); --accent-bg: rgba(255,107,26,.12);

  --sun: linear-gradient(180deg, #FFB27A 0%, #FF6B1A 55%, #E2470F 100%);
  --ember: radial-gradient(130% 140% at 0% 0%, #FFB27A 0%, #FF6B1A 40%, #E2470F 78%, #8F2A0A 100%);
  --tail: linear-gradient(90deg, var(--text) 30%, var(--muted));
  --edge: inset 0 1px 0 rgba(255,255,255,.05);
  --underglow: inset 0 -48px 64px -48px rgba(255,107,26,.32);
  --glow-btn: 0 10px 32px -10px rgba(255,107,26,.65), inset 0 1px 0 rgba(255,255,255,.35);
  --shadow: 0 30px 90px -20px rgba(0,0,0,.7);
  /* depth: glass panes lit from above with ember at the foot; "night" switches the sky pieces on */
  --glass: linear-gradient(180deg, rgba(24,29,41,.74), rgba(12,15,23,.84));
  --glass-edge: linear-gradient(180deg, rgba(255,255,255,.16), rgba(255,255,255,.04) 40%, rgba(255,107,26,.34));
  --glass-hot: linear-gradient(180deg, rgba(42,28,21,.9), rgba(21,15,13,.94));
  --glass-hot-edge: linear-gradient(180deg, rgba(255,190,140,.62), rgba(255,107,26,.16) 42%, rgba(255,107,26,.62));
  --warm: linear-gradient(180deg, rgba(255,140,70,.14), rgba(255,107,26,.03));
  --warm-line: rgba(255,178,122,.22);
  --lumen: linear-gradient(180deg, #FFFFFF 20%, #DAD4E3 100%);
  --night: 1;
  /* the mark (design-system/brand): the distribution, the hurdle, the hurdle's halo; lit bars use --accent */
  --mark-dim: #56607A; --mark-hurdle: #FFF4EA; --mark-halo: rgba(255,178,122,.38);

  --display: "Manrope", "Manrope Fallback", system-ui, -apple-system, "Segoe UI", sans-serif;
  --sans: "IBM Plex Sans", "Plex Fallback", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --serif: "Instrument Serif", Georgia, serif; /* retired: use .qb-tail */

  --fs-hero: clamp(44px, 6.4vw, 92px); --fs-h1: clamp(36px, 4.6vw, 64px); --fs-h2: clamp(28px, 3.2vw, 46px);
  --fs-h3: 22px; --fs-lead: clamp(17px, 1.4vw, 20px); --fs-body: 16px; --fs-small: 14px; --fs-micro: 12px;

  --s1: 4px; --s2: 8px; --s3: 12px; --s4: 16px; --s5: 20px; --s6: 24px; --s8: 32px; --s10: 40px; --s12: 96px;
  --rail: 1200px; --pad: clamp(16px, 4vw, 48px); --section: clamp(72px, 10vw, 140px);
  --r-xs: 6px; --r-sm: 10px; --r: 16px; --r-lg: 22px; --r-xl: 28px; --r-pill: 999px;

  --ease-out: cubic-bezier(.16, 1, .3, 1); --ease-soft: cubic-bezier(.25, 1, .5, 1); --ease-spring: cubic-bezier(.175, .885, .32, 1.275);
  --t-fast: 150ms; --t-base: 300ms; --t-slow: 700ms; --t-arrive: 1200ms; --t-bloom: 2200ms; --stagger: 120ms;

  /* console aliases (dashboard/app/tw.css names) */
  --page: var(--ground); --card: var(--surface); --well: var(--sunk); --line2: var(--line-2);
  --amber: var(--accent); --up: var(--gain); --down: var(--loss); --grey: var(--dim);
}

/* ---------- tokens: light (single-purpose pages and email only) ---------- */
:root[data-theme="light"], .qb-theme-light {
  color-scheme: light;
  --ground: #FBF8F4; --surface: #FFFFFF; --raised: #F4EFE8; --sunk: #F6F2EC; --hover: #EFE9E0;
  --line: #EAE3D9; --line-2: #D9D0C3; --line-glow: rgba(226,86,12,.22);
  --text: #17130F; --soft: #3B352F; --muted: #6A635C; --dim: #857D74;
  --accent: #E2560C; --accent-2: #F59A5B; --accent-ink: #B8430A; --on-accent: #140803; --on-loss: #FFFFFF; --orange: #C4420A;
  --gain: #0B7853; --loss: #C8243F; --warn: #946200; --info: #2F5BD3;
  --gain-bg: rgba(11,120,83,.10); --loss-bg: rgba(200,36,63,.09); --warn-bg: rgba(148,98,0,.10); --info-bg: rgba(47,91,211,.09); --accent-bg: rgba(226,86,12,.09);
  --tail: linear-gradient(90deg, var(--text) 30%, var(--muted));
  --edge: inset 0 1px 0 rgba(255,255,255,.8);
  --underglow: inset 0 -40px 56px -44px rgba(226,86,12,.22);
  --glow-btn: 0 10px 28px -12px rgba(226,86,12,.55), inset 0 1px 0 rgba(255,255,255,.4);
  --shadow: 0 24px 64px -24px rgba(40,24,8,.28);
  --glass: linear-gradient(180deg, rgba(255,255,255,.94), rgba(255,255,255,.82));
  --glass-edge: linear-gradient(180deg, #FFFFFF, #EAE3D9 40%, rgba(226,86,12,.32));
  --glass-hot: linear-gradient(180deg, #FFF5EE, #FFEADD);
  --glass-hot-edge: linear-gradient(180deg, rgba(245,154,91,.75), rgba(226,86,12,.2) 42%, rgba(226,86,12,.55));
  --warm: linear-gradient(180deg, rgba(226,86,12,.07), rgba(226,86,12,.02));
  --warm-line: rgba(226,86,12,.24);
  --lumen: linear-gradient(180deg, #17130F, #3B352F);
  --night: 0;
  --mark-dim: #BDB5AA; --mark-hurdle: #17130F; --mark-halo: transparent;
}
@media (prefers-color-scheme: light) {
  :root.qb-auto:not([data-theme="dark"]) {
    color-scheme: light;
    --ground: #FBF8F4; --surface: #FFFFFF; --raised: #F4EFE8; --sunk: #F6F2EC; --hover: #EFE9E0;
    --line: #EAE3D9; --line-2: #D9D0C3; --line-glow: rgba(226,86,12,.22);
    --text: #17130F; --soft: #3B352F; --muted: #6A635C; --dim: #857D74;
    --accent: #E2560C; --accent-2: #F59A5B; --accent-ink: #B8430A; --on-accent: #140803; --on-loss: #FFFFFF; --orange: #C4420A;
    --gain: #0B7853; --loss: #C8243F; --warn: #946200; --info: #2F5BD3;
    --gain-bg: rgba(11,120,83,.10); --loss-bg: rgba(200,36,63,.09); --warn-bg: rgba(148,98,0,.10); --info-bg: rgba(47,91,211,.09); --accent-bg: rgba(226,86,12,.09);
    --edge: inset 0 1px 0 rgba(255,255,255,.8);
    --underglow: inset 0 -40px 56px -44px rgba(226,86,12,.22);
    --glow-btn: 0 10px 28px -12px rgba(226,86,12,.55), inset 0 1px 0 rgba(255,255,255,.4);
    --shadow: 0 24px 64px -24px rgba(40,24,8,.28);
    --glass: linear-gradient(180deg, rgba(255,255,255,.94), rgba(255,255,255,.82));
    --glass-edge: linear-gradient(180deg, #FFFFFF, #EAE3D9 40%, rgba(226,86,12,.32));
    --glass-hot: linear-gradient(180deg, #FFF5EE, #FFEADD);
    --glass-hot-edge: linear-gradient(180deg, rgba(245,154,91,.75), rgba(226,86,12,.2) 42%, rgba(226,86,12,.55));
    --warm: linear-gradient(180deg, rgba(226,86,12,.07), rgba(226,86,12,.02));
    --warm-line: rgba(226,86,12,.24);
    --lumen: linear-gradient(180deg, #17130F, #3B352F);
    --night: 0;
    --mark-dim: #BDB5AA; --mark-hurdle: #17130F; --mark-halo: transparent;
  }
}

/* metric-matched fallbacks so the webfont swap does not shift layout */
@font-face { font-family: "Manrope Fallback"; src: local("Arial"), local("Helvetica Neue"), local("Helvetica"); size-adjust: 103%; ascent-override: 103%; descent-override: 29%; line-gap-override: 0%; }
@font-face { font-family: "Plex Fallback"; src: local("Arial"), local("Helvetica Neue"), local("Helvetica"); size-adjust: 101%; ascent-override: 102%; descent-override: 27%; line-gap-override: 0%; }

/* The ground always wins. Unlayered on purpose: no host page, reset or
   framework layer can paint a Horizon page light. */
html, body { background-color: var(--ground); color: var(--text); }

/* ---------- base ---------- */
@layer base {
  *, *::before, *::after { box-sizing: border-box; }
  html { -webkit-text-size-adjust: 100%; }
  body { margin: 0; background: var(--ground); color: var(--text); font: 400 var(--fs-body)/1.6 var(--sans); -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
  :where(h1, h2, h3, h4, p, figure) { margin: 0; }
  :where(a) { color: inherit; }
  :where(img, svg) { display: block; max-width: 100%; }
  :where(button, input, select, textarea) { font: inherit; color: inherit; }
  :focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
  [hidden] { display: none !important; } /* components set display; hidden must still win */
  ::selection { background: var(--accent); color: var(--on-accent); }
}

/* ---------- components ---------- */
@layer components {
  .qb-rail { max-width: var(--rail); margin: 0 auto; padding: 0 var(--pad); }
  .qb-section { padding: var(--section) 0; position: relative; }
  .qb-num { font-family: var(--mono); font-variant-numeric: tabular-nums; }

  /* type */
  .qb-hero, .qb-h1, .qb-h2, .qb-h3 { font-family: var(--display); font-weight: 600; text-wrap: balance; color: var(--text); }
  .qb-hero { font-size: var(--fs-hero); line-height: 1.02; letter-spacing: -.035em; }
  .qb-h1 { font-size: var(--fs-h1); line-height: 1.05; letter-spacing: -.03em; }
  .qb-h2 { font-size: var(--fs-h2); line-height: 1.1; letter-spacing: -.025em; }
  .qb-h3 { font-size: var(--fs-h3); line-height: 1.3; letter-spacing: -.015em; }
  .qb-lead { font-size: var(--fs-lead); line-height: 1.6; color: var(--soft); max-width: 60ch; }
  .qb-small { font-size: var(--fs-small); color: var(--muted); }
  .qb-tail { background: var(--tail); -webkit-background-clip: text; background-clip: text; color: transparent; }
  .qb-eyebrow { font: 500 var(--fs-micro)/1.4 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--accent-ink); }
  .qb-link { color: var(--accent-ink); text-decoration: underline; text-decoration-color: color-mix(in srgb, var(--accent-ink) 40%, transparent); text-underline-offset: 3px; }
  .qb-link:hover { text-decoration-color: currentColor; }

  /* buttons */
  .qb-btn { position: relative; display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 0 20px; border-radius: var(--r-pill); border: 1px solid transparent; font: 600 15px/1 var(--sans); text-decoration: none; white-space: nowrap; cursor: pointer; background: transparent; color: var(--text); transition: background-color var(--t-fast) ease, border-color var(--t-fast) ease, color var(--t-fast) ease, box-shadow var(--t-base) var(--ease-soft), transform var(--t-base) var(--ease-spring); }
  .qb-btn--primary { background: var(--sun); color: var(--on-accent); box-shadow: var(--glow-btn); }
  .qb-btn--primary:hover { box-shadow: 0 14px 40px -10px rgba(255,107,26,.8), inset 0 1px 0 rgba(255,255,255,.45); }
  .qb-btn--secondary { background: var(--warm), color-mix(in srgb, var(--surface) 82%, transparent); border-color: var(--warm-line); box-shadow: var(--edge), inset 0 -12px 20px -14px rgba(255,107,26,.5); }
  .qb-btn--secondary:hover { border-color: color-mix(in srgb, var(--accent-2) 55%, transparent); }
  .qb-btn--ghost:hover { background: var(--hover); }
  .qb-btn--danger { border-color: color-mix(in srgb, var(--loss) 55%, transparent); color: var(--loss); }
  .qb-btn--danger:hover { background: var(--loss-bg); }
  .qb-btn--sm { min-height: 36px; padding: 0 14px; font-size: 14px; }
  .qb-btn--lg { min-height: 52px; padding: 0 26px; font-size: 16px; }
  .qb-btn .qb-arrow { transition: transform var(--t-base) var(--ease-soft); }
  .qb-btn:hover .qb-arrow { transform: translateX(2px); }
  .qb-btn:disabled, .qb-btn[aria-disabled="true"] { opacity: .45; box-shadow: none; cursor: not-allowed; }
  .qb-btn[aria-busy="true"] { color: transparent; pointer-events: none; }
  .qb-btn[aria-busy="true"]::after { content: ""; position: absolute; width: 16px; height: 16px; border-radius: 50%; border: 2px solid currentColor; border-color: var(--on-accent) transparent var(--on-accent) var(--on-accent); }
  .qb-btn--secondary[aria-busy="true"]::after, .qb-btn--ghost[aria-busy="true"]::after { border-color: var(--text) transparent var(--text) var(--text); }

  /* the wordmark: Manrope 700, tight, ".live" in accent ink. Pair with the mark (design-system/brand). */
  .qb-wordmark { font: 700 17px/1 var(--display); letter-spacing: -.025em; color: var(--text); white-space: nowrap; }
  .qb-wordmark i { font-style: normal; color: var(--accent-ink); }

  /* labels */
  .qb-pill { display: inline-flex; align-items: center; gap: 10px; padding: 4px 14px 4px 4px; border-radius: var(--r-pill); border: 1px solid var(--line-2); background: color-mix(in srgb, var(--surface) 80%, transparent); font: 500 13px/1.3 var(--sans); color: var(--soft); text-decoration: none; box-shadow: var(--edge); }
  .qb-pill--plain { padding: 6px 14px; }
  .qb-pill__tag { padding: 5px 10px; border-radius: var(--r-pill); background: var(--sun); color: var(--on-accent); font-weight: 600; }
  .qb-chip { display: inline-flex; align-items: center; gap: 6px; padding: 3px 9px; border-radius: var(--r-pill); font: 500 11.5px/1.4 var(--mono); letter-spacing: .02em; border: 1px solid var(--line-2); color: var(--soft); background: var(--sunk); }
  .qb-chip[data-kind="exit"] { color: var(--accent-ink); border-color: var(--line-glow); background: var(--accent-bg); }
  .qb-chip[data-kind="rug"] { color: var(--loss); border-color: color-mix(in srgb, var(--loss) 35%, transparent); background: var(--loss-bg); }
  .qb-chip[data-kind="idea"] { color: var(--info); border-color: color-mix(in srgb, var(--info) 35%, transparent); background: var(--info-bg); }
  .qb-chip[data-kind="daily"] { color: var(--gain); border-color: color-mix(in srgb, var(--gain) 35%, transparent); background: var(--gain-bg); }
  .qb-chip[data-kind="watch"] { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 35%, transparent); background: var(--warn-bg); }
  .qb-badge { display: inline-flex; align-items: center; padding: 3px 10px; border-radius: var(--r-pill); font: 600 12px/1.4 var(--sans); background: var(--raised); color: var(--soft); border: 1px solid var(--line-2); }
  .qb-badge--paid { background: var(--sun); color: var(--on-accent); border-color: transparent; }

  /* status (run and system states) */
  .qb-status { display: inline-flex; align-items: center; gap: 8px; min-height: 28px; padding: 4px 12px 4px 10px; border-radius: var(--r-pill); font: 600 12.5px/1.2 var(--sans); border: 1px solid var(--line-2); background: var(--sunk); color: var(--soft); }
  .qb-status::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: currentColor; flex: none; }
  .qb-status[data-state="active"] { color: var(--gain); background: var(--gain-bg); border-color: color-mix(in srgb, var(--gain) 30%, transparent); }
  .qb-status[data-state="dry"] { color: var(--info); background: var(--info-bg); border-color: color-mix(in srgb, var(--info) 30%, transparent); }
  .qb-status[data-state="paused"], .qb-status[data-state="halted"] { color: var(--warn); background: var(--warn-bg); border-color: color-mix(in srgb, var(--warn) 35%, transparent); }
  .qb-status[data-state="halted"]::before { border-radius: 2px; }
  .qb-status[data-state="frozen"] { color: var(--loss); background: var(--loss-bg); border-color: color-mix(in srgb, var(--loss) 35%, transparent); }
  .qb-status[data-state="killed"] { color: var(--on-loss); background: var(--loss); border-color: var(--loss); }
  .qb-status[data-state="killed"]::before { border-radius: 1px; width: 9px; height: 9px; }
  .qb-status[data-state="unknown"] { color: var(--dim); }
  .qb-now, .qb-now * { transition: none !important; animation: none !important; }

  /* surfaces */
  .qb-card { position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg); box-shadow: var(--edge); }
  .qb-card--glow { border-color: var(--line-glow); box-shadow: var(--edge), var(--underglow); }
  .qb-card--feature { border-color: color-mix(in srgb, var(--accent) 70%, transparent); box-shadow: var(--edge), var(--underglow), 0 0 0 1px color-mix(in srgb, var(--accent) 25%, transparent), 0 24px 80px -30px rgba(255,107,26,.45); }
  .qb-card__pad { padding: clamp(20px, 2.4vw, 28px); }
  .qb-ember { position: relative; isolation: isolate; overflow: hidden; color: #140A02; background: var(--ember); border-radius: var(--r-lg); }
  .qb-ember::after { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none; background-image: radial-gradient(rgba(255,255,255,.16) .7px, transparent 1px); background-size: 4px 4px; mask-image: linear-gradient(90deg, transparent 0%, #000 55%, #000 80%, transparent 100%); }
  .qb-panel--cta { position: relative; overflow: hidden; border-radius: var(--r-xl); border: 1px solid var(--line-glow); background: radial-gradient(120% 90% at 50% 120%, rgba(255,107,26,.28), transparent 60%), var(--surface); box-shadow: var(--edge), inset 0 -2px 0 color-mix(in srgb, var(--accent) 70%, transparent), 0 40px 120px -40px rgba(255,107,26,.45); }

  /* the horizon arc */
  .qb-horizon { position: absolute; left: 50%; width: min(2200px, 220vw); aspect-ratio: 11 / 7; transform: translateX(-50%); border-radius: 50%; pointer-events: none; z-index: 0;
    background: radial-gradient(closest-side, transparent 95.4%, rgba(226,71,15,.35) 97.2%, rgba(255,107,26,.9) 98.6%, rgba(255,214,170,1) 99.3%, transparent 100%); filter: blur(2px); }
  .qb-horizon::after { content: ""; position: absolute; inset: 0; border-radius: 50%; background: radial-gradient(closest-side, transparent 62%, rgba(226,71,15,.26) 88%, rgba(255,107,26,.32) 96%, transparent 100%); filter: blur(36px); }
  .qb-horizon--top { top: calc(min(2200px, 220vw) * -0.56); }
  .qb-horizon--rise { bottom: calc(min(1600px, 160vw) * -0.45); width: min(1600px, 160vw); }

  /* pointer light (positioned by motion.js through --px/--py) */
  .qb-light { position: fixed; left: 0; top: 0; width: 720px; height: 720px; margin: -360px 0 0 -360px; border-radius: 50%; pointer-events: none; z-index: 0; opacity: 0;
    background: radial-gradient(closest-side, rgba(255,107,26,.13), rgba(255,107,26,.05) 45%, transparent 72%); transform: translate3d(var(--px, -999px), var(--py, -999px), 0); }

  /* data */
  .qb-stat { display: grid; gap: 6px; }
  .qb-stat__label { font: 500 var(--fs-micro)/1.3 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
  .qb-stat__value { font: 500 clamp(26px, 2.6vw, 34px)/1.1 var(--mono); font-variant-numeric: tabular-nums; letter-spacing: -.02em; color: var(--text); }
  .qb-delta { font: 500 13px/1.3 var(--mono); font-variant-numeric: tabular-nums; }
  .qb-delta[data-dir="up"] { color: var(--gain); } .qb-delta[data-dir="up"]::before { content: "▲ "; font-size: .8em; }
  .qb-delta[data-dir="down"] { color: var(--loss); } .qb-delta[data-dir="down"]::before { content: "▼ "; font-size: .8em; }
  .qb-delta[data-dir="flat"] { color: var(--flat); } .qb-delta[data-dir="flat"]::before { content: "– "; }
  .qb-est { color: var(--warn); font-size: .85em; margin-left: 4px; }
  .qb-est::before { content: "est."; }

  .qb-table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: 14px; }
  .qb-table th { position: sticky; top: 0; z-index: 1; background: var(--surface); text-align: left; font: 500 11.5px/1.2 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); padding: 10px 12px; border-bottom: 1px solid var(--line-2); white-space: nowrap; }
  .qb-table td { padding: 0 12px; height: 44px; border-bottom: 1px solid var(--line); color: var(--soft); white-space: nowrap; }
  .qb-table tbody tr:hover td { background: var(--hover); }
  .qb-table .n { text-align: right; font-family: var(--mono); font-variant-numeric: tabular-nums; color: var(--text); }
  .qb-table .n.up { color: var(--gain); } .qb-table .n.down { color: var(--loss); }
  .qb-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }

  .qb-gauge { display: grid; gap: 8px; }
  .qb-gauge__track { position: relative; height: 8px; border-radius: var(--r-pill); background: var(--sunk); border: 1px solid var(--line); overflow: hidden; }
  .qb-gauge__fill { position: absolute; inset: 0 auto 0 0; width: var(--v, 0%); border-radius: inherit; background: var(--sun); }
  .qb-gauge__fill[data-tone="loss"] { background: var(--loss); }
  .qb-gauge__mark { position: absolute; top: -3px; bottom: -3px; left: var(--m, 100%); width: 2px; background: var(--text); }

  .qb-timeline { list-style: none; margin: 0; padding: 0; }
  .qb-timeline li { display: grid; grid-template-columns: 32px 1fr auto; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--line); }
  .qb-timeline .ic { width: 32px; height: 32px; border-radius: 10px; display: grid; place-items: center; background: var(--sunk); border: 1px solid var(--line); color: var(--muted); }
  .qb-timeline time { font: 400 12px/1.4 var(--mono); color: var(--muted); white-space: nowrap; }

  .qb-empty { text-align: center; padding: 40px 20px; color: var(--muted); border: 1px dashed var(--line-2); border-radius: var(--r-lg); }
  .qb-empty b { display: block; color: var(--text); font: 600 16px/1.4 var(--sans); margin-bottom: 4px; }

  /* notices and single-purpose pages */
  /* a block, not a grid: inline content (links, bold) flows as one paragraph; the icon sits in the left padding */
  .qb-notice { position: relative; display: block; padding: 12px 14px 12px 42px; border-radius: var(--r-sm); border: 1px solid var(--line-2); background: var(--sunk); font-size: 14px; line-height: 1.5; color: var(--soft); }
  .qb-notice::before { position: absolute; left: 14px; top: 12px; width: 20px; font: 700 13px/21px var(--mono); text-align: center; }
  .qb-notice--info { border-color: color-mix(in srgb, var(--info) 35%, transparent); background: var(--info-bg); } .qb-notice--info::before { content: "i"; color: var(--info); }
  .qb-notice--ok { border-color: color-mix(in srgb, var(--gain) 35%, transparent); background: var(--gain-bg); } .qb-notice--ok::before { content: "✓"; color: var(--gain); }
  .qb-notice--warn { border-color: color-mix(in srgb, var(--warn) 40%, transparent); background: var(--warn-bg); } .qb-notice--warn::before { content: "!"; color: var(--warn); }
  .qb-notice--error { border-color: color-mix(in srgb, var(--loss) 40%, transparent); background: var(--loss-bg); } .qb-notice--error::before { content: "×"; color: var(--loss); }

  .qb-solo { min-height: 100svh; display: grid; place-items: center; padding: 48px var(--pad); position: relative; overflow: hidden; }
  .qb-solo__card { position: relative; z-index: 1; width: min(440px, 100%); padding: clamp(24px, 4vw, 36px); display: grid; gap: 18px; }
  .qb-secret { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 10px; padding: 10px 10px 10px 14px; border-radius: var(--r-sm); background: var(--sunk); border: 1px solid var(--line-2); font: 500 14px/1.4 var(--mono); word-break: break-all; }
  .qb-secret__warn { font-size: 13px; color: var(--warn); }
  .qb-poll { display: inline-flex; align-items: center; gap: 10px; font: 500 14px/1.4 var(--sans); color: var(--soft); }
  .qb-poll::before { content: ""; width: 10px; height: 10px; border-radius: 50%; background: var(--accent); }

  /* navigation */
  .qb-topbar { position: sticky; top: 14px; z-index: 40; display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 56px; max-width: 1040px; margin: 0 auto; padding: 0 10px 0 20px; border-radius: var(--r-pill); border: 1px solid var(--line-2); background: color-mix(in srgb, var(--surface) 78%, transparent); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); box-shadow: var(--edge); }
  .qb-tabs { display: flex; gap: 22px; border-bottom: 1px solid var(--line); }
  .qb-tabs a, .qb-tabs button { padding: 12px 0; border: 0; background: none; color: var(--muted); font: 500 14px/1 var(--sans); text-decoration: none; box-shadow: inset 0 -2px 0 transparent; transition: color var(--t-fast) ease, box-shadow var(--t-base) var(--ease-soft); }
  .qb-tabs [aria-selected="true"], .qb-tabs [aria-current="page"] { color: var(--text); box-shadow: inset 0 -2px 0 var(--accent); }
  .qb-seg { display: inline-flex; padding: 3px; gap: 2px; border-radius: var(--r-pill); background: var(--sunk); border: 1px solid var(--line); }
  .qb-seg button { min-height: 32px; padding: 0 14px; border-radius: var(--r-pill); border: 0; background: none; color: var(--muted); font: 500 13px/1 var(--sans); }
  .qb-seg [aria-pressed="true"] { background: var(--raised); color: var(--text); box-shadow: var(--edge); }
  .qb-tabbar { position: fixed; left: 0; right: 0; bottom: 0; z-index: 40; display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; padding: 8px 8px calc(8px + env(safe-area-inset-bottom)); background: color-mix(in srgb, var(--surface) 88%, transparent); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-top: 1px solid var(--line); }
  .qb-tabbar a { display: grid; justify-items: center; gap: 4px; min-height: 48px; padding-top: 6px; color: var(--muted); font: 500 11px/1 var(--sans); text-decoration: none; }
  .qb-tabbar [aria-current="page"] { color: var(--accent-ink); }

  /* forms */
  .qb-field { display: grid; gap: 6px; }
  .qb-field label { font: 500 13px/1.3 var(--sans); color: var(--soft); }
  .qb-field .hint { font-size: 12.5px; color: var(--muted); }
  .qb-field .err { font-size: 12.5px; color: var(--loss); }
  .qb-input { min-height: 44px; width: 100%; padding: 0 14px; border-radius: var(--r-sm); border: 1px solid var(--line-2); background: var(--sunk); color: var(--text); transition: border-color var(--t-fast) ease, box-shadow var(--t-base) var(--ease-soft); }
  .qb-input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-bg); }
  .qb-input[aria-invalid="true"] { border-color: var(--loss); }

  /* switch: <button class="qb-switch" role="switch" aria-checked="true"> */
  .qb-switch { position: relative; width: 44px; height: 26px; flex: none; padding: 0; border-radius: var(--r-pill); border: 1px solid var(--line-2); background: var(--sunk); cursor: pointer; }
  .qb-switch::after { content: ""; position: absolute; top: 3px; left: 3px; width: 18px; height: 18px; border-radius: 50%; background: var(--muted); }
  .qb-switch[aria-checked="true"] { background: var(--sun); border-color: transparent; box-shadow: 0 6px 18px -8px rgba(255,107,26,.75), inset 0 1px 0 rgba(255,255,255,.3); }
  .qb-switch[aria-checked="true"]::after { transform: translateX(18px); background: #FFFFFF; }

  /* accordion */
  .qb-acc { border-bottom: 1px solid var(--line); }
  .qb-acc > summary { list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 16px; min-height: 56px; cursor: pointer; font: 600 17px/1.4 var(--sans); }
  .qb-acc > summary::-webkit-details-marker { display: none; }
  .qb-acc > summary::after { content: "+"; font: 400 24px/1 var(--sans); color: var(--accent-ink); transition: transform var(--t-slow) var(--ease-out); }
  .qb-acc[open] > summary::after { transform: rotate(45deg); }
  .qb-acc > .qb-acc__body { padding: 0 0 18px; color: var(--soft); }

  /* marquee */
  .qb-marquee { overflow: hidden; mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
  .qb-marquee__track { display: flex; gap: 56px; width: max-content; }

  /* skeleton */
  .qb-skel { border-radius: var(--r-sm); background: var(--raised); }

  /* live dot */
  .qb-live { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--gain); }

  /* ---------- atmosphere and depth (DESIGN-SYSTEM-V2.md §4). Dark only: --night is 0 in light. ---------- */
  /* the night sky behind a hero: ember haze top left, a cold breath right, film grain */
  .qb-atmos { position: absolute; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; opacity: var(--night);
    background:
      radial-gradient(42% 30% at 8% 4%, rgba(255,107,26,.09), transparent 70%),
      radial-gradient(34% 40% at 96% 36%, rgba(127,166,255,.05), transparent 72%),
      linear-gradient(180deg, #0B0F18 0%, var(--ground) 46%); }
  .qb-atmos::after { content: ""; position: absolute; inset: 0; opacity: .06; mix-blend-mode: overlay;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>"); }
  /* light shafts falling from the top left */
  .qb-beams { position: absolute; top: -30%; left: -25%; width: 95%; height: 130%; z-index: 0; pointer-events: none; opacity: var(--night);
    background: repeating-linear-gradient(118deg, transparent 0 70px, rgba(236,232,255,.07) 110px 170px, transparent 220px 330px);
    -webkit-mask-image: radial-gradient(60% 55% at 30% 22%, #000 10%, transparent 75%); mask-image: radial-gradient(60% 55% at 30% 22%, #000 10%, transparent 75%);
    filter: blur(16px); }
  /* the planet: a dark body, a white-hot rim at the crest cooling to ember, a cool limb down the sides */
  .qb-planet { position: absolute; left: 50%; z-index: 0; width: var(--size, min(1500px, 190vw)); aspect-ratio: 1; transform: translateX(-50%); border-radius: 50%; pointer-events: none; opacity: var(--night);
    background:
      radial-gradient(46% 17% at 50% 0%, rgba(255,124,44,.55), rgba(226,71,15,.18) 55%, transparent 100%),
      var(--ground);
    box-shadow: 0 -14px 70px -20px rgba(255,150,70,.6), 0 -50px 180px -40px rgba(226,71,15,.45); }
  .qb-planet::before { content: ""; position: absolute; inset: 0; border-radius: 50%;
    background: radial-gradient(closest-side, transparent 93.6%, rgba(226,71,15,.7) 95.6%, #FF8A47 97%, #FFD9B8 98.3%, #FFF4EA 98.8%, rgba(255,186,130,.5) 99.5%, transparent 100%);
    -webkit-mask-image: radial-gradient(72% 58% at 50% 0%, #000 22%, transparent 100%); mask-image: radial-gradient(72% 58% at 50% 0%, #000 22%, transparent 100%);
    filter: blur(2.5px); }
  .qb-planet::after { content: ""; position: absolute; inset: 0; border-radius: 50%;
    background: radial-gradient(closest-side, transparent 97.4%, rgba(214,220,236,.34) 99.1%, transparent 100%);
    -webkit-mask-image: linear-gradient(180deg, transparent 3%, #000 16%, #000 30%, transparent 55%); mask-image: linear-gradient(180deg, transparent 3%, #000 16%, #000 30%, transparent 55%);
    filter: blur(1.5px); }
  /* glass: translucent, lit at the top edge, ember at the foot */
  .qb-glass { position: relative; border: 1px solid transparent; border-radius: var(--r-lg);
    background: var(--glass) padding-box, var(--glass-edge) border-box;
    box-shadow: var(--edge), var(--underglow), var(--shadow);
    -webkit-backdrop-filter: blur(14px) saturate(1.15); backdrop-filter: blur(14px) saturate(1.15); }
  .qb-glass--hot { background: var(--glass-hot) padding-box, var(--glass-hot-edge) border-box;
    box-shadow: inset 0 1px 0 rgba(255,214,170,.16), inset 0 -60px 80px -50px rgba(255,107,26,.42), 0 40px 110px -30px rgba(255,107,26,.32); }
  /* a product shot standing in perspective; .qb-float lifts one card off it */
  .qb-device { position: relative; perspective: 2000px; }
  .qb-device__screen { position: relative; transform: rotateX(var(--tilt, 14deg)); transform-origin: 50% 100%; transform-style: preserve-3d; }
  .qb-float { transform: translateZ(80px); }
  /* luminous display type: white at the top, a breath of lilac at the foot */
  /* the padding keeps descenders inside the painted box; the margin gives the space back */
  .qb-lumen { background: var(--lumen); -webkit-background-clip: text; background-clip: text; color: transparent; padding-bottom: .14em; margin-bottom: -.14em; }
  /* icon orb and check list */
  .qb-orb { display: grid; place-items: center; flex: none; width: 48px; height: 48px; border-radius: 50%; background: var(--sun); color: var(--on-accent); box-shadow: 0 0 0 6px var(--accent-bg), 0 12px 30px -8px rgba(255,107,26,.7), inset 0 1px 0 rgba(255,255,255,.4); }
  .qb-orb--quiet { background: var(--raised); color: var(--muted); box-shadow: var(--edge); }
  .qb-checks { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
  .qb-checks li { position: relative; padding-left: 32px; color: var(--soft); line-height: 1.5; }
  .qb-checks li::before { content: ""; position: absolute; left: 0; top: 1px; width: 20px; height: 20px; border-radius: 6px; background: var(--sun); box-shadow: 0 4px 14px -4px rgba(255,107,26,.6), inset 0 1px 0 rgba(255,255,255,.35); }
  .qb-checks li::after { content: ""; position: absolute; left: 7px; top: 4px; width: 6px; height: 11px; border: solid var(--on-accent); border-width: 0 2px 2px 0; transform: rotate(45deg); }
}

/* ---------- motion (only for people who have not asked for less) ---------- */
@media (prefers-reduced-motion: no-preference) {
  @keyframes qb-arrive { from { opacity: 0; transform: translateY(18px); filter: blur(8px); } }
  @keyframes qb-bloom { from { opacity: 0; transform: translateX(-50%) scale(.86) rotate(-12deg); } }
  @keyframes qb-rise { from { opacity: 0; transform: translateY(24px); } }
  @keyframes qb-tilt { from { transform: perspective(1400px) rotateX(18deg) translateY(40px) scale(.96); } }
  @keyframes qb-marquee { to { transform: translateX(-50%); } }
  @keyframes qb-sheen { from { background-position: 150% 0; } to { background-position: -50% 0; } }
  @keyframes qb-pulse { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--gain) 55%, transparent); } 70%, 100% { box-shadow: 0 0 0 9px transparent; } }
  @keyframes qb-tick { from { background-color: var(--tick, var(--accent-bg)); } }
  @keyframes qb-spin { to { transform: rotate(360deg); } }
  @keyframes qb-sheet { from { opacity: 0; transform: translateY(24px); } }
  @keyframes qb-ping { 0% { opacity: 1; } 50% { opacity: .35; } 100% { opacity: 1; } }

  .qb-arrive { animation: qb-arrive var(--t-arrive) var(--ease-out) both; animation-delay: calc(200ms + var(--i, 0) * var(--stagger)); }
  @keyframes qb-rise-planet { from { opacity: 0; transform: translateX(-50%) translateY(90px) scale(.95); } }
  @keyframes qb-fade { from { opacity: 0; } }
  @keyframes qb-flatten { to { transform: rotateX(0deg); } }
  .qb-planet { animation: qb-rise-planet var(--t-bloom) var(--ease-out) both; }
  .qb-beams { animation: qb-fade 2.6s var(--ease-soft) .2s both; }
  .qb-float { transition: transform var(--t-slow) var(--ease-out); }
  .qb-device:hover .qb-float { transform: translateZ(110px) translateY(-6px); }
  @supports (animation-timeline: view()) {
    .qb-device__screen { animation: qb-flatten linear both; animation-timeline: view(); animation-range: entry 30% cover 55%; }
  }
  .qb-horizon { animation: qb-bloom var(--t-bloom) var(--ease-out) both; }
  @supports (animation-timeline: view()) {
    .qb-reveal { animation: qb-rise linear both; animation-timeline: view(); animation-range: entry 0% entry 60%; }
    .qb-tilt { animation: qb-tilt linear both; animation-timeline: view(); animation-range: entry 0% cover 45%; transform-origin: 50% 100%; }
  }
  .qb-marquee__track { animation: qb-marquee 48s linear infinite; }
  .qb-marquee:hover .qb-marquee__track { animation-play-state: paused; }
  .qb-skel { background: linear-gradient(100deg, var(--raised) 40%, var(--hover) 50%, var(--raised) 60%) 0 0 / 200% 100%; animation: qb-sheen 1.4s linear infinite; }
  .qb-live { animation: qb-pulse 2.4s ease-out infinite; }
  .qb-poll::before { animation: qb-ping 1.6s ease-in-out infinite; }
  .qb-btn[aria-busy="true"]::after { animation: qb-spin .8s linear infinite; }
  .qb-tick { animation: qb-tick 600ms var(--ease-soft); border-radius: 6px; }
  .qb-tick[data-dir="up"] { --tick: var(--gain-bg); } .qb-tick[data-dir="down"] { --tick: var(--loss-bg); }
  .qb-sheet { animation: qb-sheet var(--t-base) var(--ease-out) both; }
  .qb-press:active, .qb-btn:active { transform: scale(.97); }
  .qb-switch, .qb-switch::after { transition: background-color var(--t-base) var(--ease-soft), transform var(--t-base) var(--ease-spring), box-shadow var(--t-base) var(--ease-soft); }
  .qb-light.on { opacity: 1; transition: opacity var(--t-slow) var(--ease-soft); }
  .qb-depth { transform: translate3d(calc((var(--mx, .5) - .5) * -16px * var(--d, 1)), calc((var(--my, .5) - .5) * -16px * var(--d, 1)), 0); transition: transform var(--t-slow) var(--ease-soft); }
  .qb-acc > .qb-acc__body { animation: qb-rise var(--t-slow) var(--ease-out); }
  @supports (interpolate-size: allow-keywords) {
    :root { interpolate-size: allow-keywords; }
    .qb-acc::details-content { block-size: 0; overflow: clip; transition: block-size 600ms var(--ease-out), content-visibility 600ms allow-discrete; }
    .qb-acc[open]::details-content { block-size: auto; }
    .qb-acc > .qb-acc__body { animation: none; }
  }
  /* the glow card: underglow warms and a spotlight follows the pointer (motion.js sets --gx/--gy) */
  .qb-glow { transition: border-color var(--t-slow) var(--ease-soft), box-shadow var(--t-slow) var(--ease-soft); }
  .qb-glow::before { content: ""; position: absolute; inset: 0; border-radius: inherit; pointer-events: none; opacity: 0; transition: opacity var(--t-slow) var(--ease-soft);
    background: radial-gradient(420px circle at var(--gx, 50%) var(--gy, 120%), rgba(255,107,26,.14), transparent 60%); }
  .qb-glow:hover { border-color: color-mix(in srgb, var(--accent) 45%, transparent); }
  .qb-glow:hover::before { opacity: 1; }
}
/* hovers that are not motion still apply under reduce */
.qb-glow:hover { border-color: color-mix(in srgb, var(--accent) 45%, transparent); }
@media (prefers-reduced-motion: reduce) { .qb-light { display: none; } }
@media (hover: none) { .qb-light { display: none; } }
@media print { .qb-light, .qb-horizon { display: none; } * { animation: none !important; } }