/* Meridian — seller-side marketing site. Hand-written CSS, no framework.
   Editorial system: neutral black, hairline rules, mono figures. No cards, no glass.
   The map canvas is fixed behind the whole page; sections carry a column scrim for the text. */

@layer tokens, base, layout, components, sections, motion;

@layer tokens {
  :root {
    color-scheme: dark;
    --bg: oklch(10.5% 0.004 250);
    --bg-90: color-mix(in oklch, var(--bg) 90%, transparent);
    --bg-70: color-mix(in oklch, var(--bg) 70%, transparent);
    --ink: oklch(95% 0.004 250);
    --ink-2: oklch(77% 0.006 250);
    --ink-3: oklch(60% 0.008 250);
    --ink-4: oklch(50% 0.008 250);
    --line: color-mix(in oklch, var(--ink) 13%, transparent);
    --line-strong: color-mix(in oklch, var(--ink) 26%, transparent);
    --signal: oklch(86% 0.035 230);   /* pale steel: kickers, rules, chart ink */
    --mint: oklch(90% 0.16 140);      /* money, live state, primary action */
    --mint-dim: color-mix(in oklch, var(--mint) 18%, transparent);
    --warn: oklch(72% 0.10 28);       /* refused list — muted, not a badge colour */
    --font-sans: "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
    --font-mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
    --font-serif: "Instrument Serif", "Iowan Old Style", Georgia, serif;
    --bar-h: 64px;
    --ease-out: cubic-bezier(.22, 1, .36, 1);
  }
}

@layer base {
  *, *::before, *::after { box-sizing: border-box; }
  html { background: var(--bg); scroll-behavior: smooth; scroll-padding-top: 24px; -webkit-text-size-adjust: 100%; }
  body {
    margin: 0; min-height: 100dvh;
    background: var(--bg); color: var(--ink);
    font-family: var(--font-sans); font-size: 1rem; line-height: 1.55;
    font-feature-settings: "ss01", "cv11";
    overflow-x: clip;
  }
  h1, h2, h3, h4 { margin: 0; font-weight: 560; letter-spacing: -0.02em; line-height: 1.06; text-wrap: balance; }
  p { margin: 0; text-wrap: pretty; }
  a { color: inherit; text-decoration: none; }
  button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
  img, svg, canvas { display: block; max-width: 100%; }
  ::selection { background: var(--mint); color: var(--bg); }
  :focus-visible { outline: 1px solid var(--mint); outline-offset: 3px; }
  .mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
  .serif { font-family: var(--font-serif); font-style: italic; font-weight: 400; letter-spacing: 0; }
  .sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
}

@layer layout {
  /* the map lives behind everything */
  .map { position: fixed; inset: 0; width: 100%; height: 100%; z-index: 0; touch-action: pan-y; }
  .page { position: relative; z-index: 1; }
  .wrap { width: min(1240px, 100% - 48px); margin-inline: auto; }
  .cols { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: 24px; }
  .cols > *, .dash > *, .integration-grid > *, .contact-grid > *, .req-grid > * { min-width: 0; }
  .span-5 { grid-column: span 5; } .span-6 { grid-column: span 6; } .span-7 { grid-column: span 7; } .span-12 { grid-column: 1 / -1; }
  .from-7 { grid-column: 7 / -1; } .from-6 { grid-column: 6 / -1; }

  .section { position: relative; padding-block: clamp(80px, 11vw, 150px); }
  /* column scrim so text sits on near-black while the region of the map stays visible on the other side */
  .section::before { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
    background: linear-gradient(90deg, var(--bg) 0%, color-mix(in oklch, var(--bg) 96%, transparent) 42%, color-mix(in oklch, var(--bg) 55%, transparent) 64%, color-mix(in oklch, var(--bg) 20%, transparent) 100%); }
  .section[data-side="right"]::before { background: linear-gradient(270deg, var(--bg) 0%, color-mix(in oklch, var(--bg) 96%, transparent) 42%, color-mix(in oklch, var(--bg) 55%, transparent) 64%, color-mix(in oklch, var(--bg) 20%, transparent) 100%); }
  .section[data-side="full"]::before { background: color-mix(in oklch, var(--bg) 88%, transparent); }
  .section + .section { border-top: 1px solid var(--line); }

  .section-head { display: grid; gap: 16px; margin-bottom: clamp(36px, 5vw, 64px); }
  .kicker { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .16em; text-transform: uppercase; color: var(--signal); }
  .kicker::before { content: "—"; margin-right: 10px; color: var(--ink-4); }
  .h2 { font-size: clamp(2rem, 4.2vw, 3.3rem); }
  .lede { color: var(--ink-2); font-size: clamp(1.02rem, 1.3vw, 1.15rem); max-width: 56ch; }
  .note { font-size: .82rem; color: var(--ink-3); }
}

@layer components {
  /* ----- top bar ----- */
  .topbar { position: fixed; inset-inline: 0; top: 0; z-index: 60; height: var(--bar-h); display: flex; align-items: center; padding-inline: 24px;
    border-bottom: 1px solid transparent; transition: background .3s, border-color .3s; }
  .topbar.is-stuck { background: var(--bg-90); border-color: var(--line); }
  .topbar-inner { width: min(1240px, 100%); margin-inline: auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
  .brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: -0.01em; font-size: 1.02rem; }
  .brand svg { width: 22px; height: 22px; }
  .brand-sub { font-family: var(--font-mono); font-size: .66rem; letter-spacing: .14em; color: var(--ink-3); text-transform: uppercase; margin-left: 6px; padding-left: 12px; border-left: 1px solid var(--line-strong); }
  .topbar-links { display: flex; gap: 22px; font-size: .88rem; color: var(--ink-2); }
  .topbar-links a { padding: 6px 0; border-bottom: 1px solid transparent; transition: color .2s, border-color .2s; }
  .topbar-links a:hover { color: var(--ink); border-color: var(--ink-3); }
  .topbar-cta { display: flex; align-items: center; gap: 18px; }
  .readout { font-family: var(--font-mono); font-size: .76rem; color: var(--ink-3); opacity: 0; transition: opacity .3s; }
  .readout b { color: var(--mint); font-weight: 500; }
  .topbar.is-stuck .readout { opacity: 1; }
  .menu-btn { display: none; width: 38px; height: 38px; border: 1px solid var(--line-strong); place-items: center; }
  [popover] { inset: unset; top: calc(var(--bar-h) + 8px); right: 16px; margin: 0; padding: 8px 0; border: 1px solid var(--line-strong); background: var(--bg); color: var(--ink); display: none; flex-direction: column; min-width: 220px; }
  [popover]:popover-open { display: flex; }
  [popover]::backdrop { background: rgb(0 0 0 / .4); }
  [popover] a { padding: 12px 18px; }
  [popover] a:hover { background: color-mix(in oklch, var(--ink) 6%, transparent); }
  @starting-style { [popover]:popover-open { opacity: 0; translate: 0 -6px; } }
  [popover]:popover-open { transition: opacity .2s, translate .2s var(--ease-out); }

  /* ----- buttons ----- */
  .btn { display: inline-flex; align-items: center; gap: 10px; padding: 13px 18px; border-radius: 4px; font-weight: 560; font-size: .93rem; line-height: 1; white-space: nowrap;
    border: 1px solid var(--line-strong); color: var(--ink); background: transparent; transition: background .2s, border-color .2s, color .2s; }
  .btn:hover { border-color: var(--ink-2); background: color-mix(in oklch, var(--ink) 5%, transparent); }
  .btn-primary { background: var(--mint); color: oklch(16% 0.05 140); border-color: var(--mint); }
  .btn-primary:hover { background: color-mix(in oklch, var(--mint) 88%, white); }
  .btn-sm { padding: 10px 14px; font-size: .86rem; }
  .btn .go { transition: translate .25s var(--ease-out); }
  .btn:hover .go { translate: 3px 0; }

  /* ----- ruled ledgers (replace cards) ----- */
  .ledger { border-top: 1px solid var(--line-strong); }
  .ledger > * { display: grid; align-items: baseline; gap: 18px; padding: 20px 0; border-bottom: 1px solid var(--line); }
  .ledger .idx { font-family: var(--font-mono); font-size: .72rem; color: var(--ink-4); letter-spacing: .08em; }
  .ledger h3 { font-size: 1.08rem; font-weight: 560; }
  .ledger p { color: var(--ink-2); font-size: .93rem; }
  .ledger .num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; font-size: 1.5rem; font-weight: 500; letter-spacing: -0.02em; }
  .ledger .num small { display: block; font-size: .72rem; color: var(--ink-3); letter-spacing: .02em; margin-top: 2px; }
  .ledger .geos { font-family: var(--font-mono); font-size: .74rem; color: var(--ink-3); }
  .ledger .bars { display: flex; align-items: flex-end; gap: 2px; height: 22px; }
  .ledger .bars i { flex: 1; background: var(--signal); opacity: .55; transform-origin: bottom; animation: grow-y .9s var(--ease-out) both; animation-delay: calc(var(--i) * 40ms); }

  /* ----- inline stats ----- */
  .figures { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); border-top: 1px solid var(--line-strong); border-bottom: 1px solid var(--line); }
  .figure { padding: 22px 20px 22px 0; display: grid; gap: 6px; border-right: 1px solid var(--line); }
  .figure + .figure { padding-left: 20px; }
  .figure:last-child { border-right: 0; }
  .figure .value { font-family: var(--font-mono); font-size: clamp(1.7rem, 2.8vw, 2.3rem); font-weight: 500; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
  .figure .value small { font-size: .55em; color: var(--signal); margin-left: 2px; }
  .figure .label { font-size: .82rem; color: var(--ink-3); }

  /* ----- tags → plain inline lists ----- */
  .list { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
  .list li { display: flex; gap: 12px; align-items: baseline; color: var(--ink-2); font-size: .93rem; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
  .list li::before { content: "→"; font-family: var(--font-mono); color: var(--signal); flex: 0 0 auto; }
  .list.no li::before { content: "×"; color: var(--warn); }
  .list.ok li::before { content: "+"; color: var(--mint); }

  /* ----- filters ----- */
  .filters { display: flex; flex-wrap: wrap; gap: 4px 18px; font-family: var(--font-mono); font-size: .78rem; }
  .filter { padding: 6px 0; color: var(--ink-3); border-bottom: 1px solid transparent; transition: color .2s, border-color .2s; }
  .filter:hover { color: var(--ink); }
  .filter[aria-pressed="true"] { color: var(--ink); border-color: var(--mint); }

  /* ----- charts ----- */
  .chart { position: relative; width: 100%; min-width: 0; }
  .chart svg { width: 100%; height: auto; overflow: visible; }
  .chart .grid-line { stroke: var(--line); stroke-width: 1; }
  .chart .axis-label { font-family: var(--font-mono); font-size: 13px; fill: var(--ink-3); }
  .chart .series { fill: none; stroke: var(--signal); stroke-width: 1.5; stroke-linejoin: round; stroke-linecap: round; }
  .chart .area { fill: url(#areaFill); }
  .chart .bar { fill: var(--signal); transition: fill .2s; }
  .chart .bar:hover, .chart .bar.is-hot { fill: var(--ink); }
  .chart .bar-g:focus-visible { outline: none; }
  .chart .bar-g:focus-visible .bar { stroke: var(--mint); stroke-width: 2; }
  .chart .bar-label { font-family: var(--font-mono); font-size: 13px; fill: var(--ink-2); }
  .chart .cross { stroke: var(--ink-3); stroke-width: 1; stroke-dasharray: 3 4; opacity: 0; }
  .chart .marker { fill: var(--bg); stroke: var(--signal); stroke-width: 1.5; r: 4; opacity: 0; }
  .chart-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; padding-bottom: 12px; margin-bottom: 14px; border-bottom: 1px solid var(--line-strong); }
  .chart-head h3 { font-size: 1rem; font-weight: 560; }
  .chart-head .meta { font-family: var(--font-mono); font-size: .74rem; color: var(--ink-3); }
  .tooltip { position: absolute; pointer-events: none; z-index: 5; opacity: 0; transition: opacity .15s; padding: 7px 10px; background: var(--bg); border: 1px solid var(--line-strong);
    font-family: var(--font-mono); font-size: .74rem; color: var(--ink); white-space: nowrap; translate: -50% calc(-100% - 12px); }
  .tooltip b { color: var(--signal); font-weight: 500; }
  .tooltip.is-on { opacity: 1; }

  /* ----- code ----- */
  .code { margin: 0; padding: 18px 20px; background: var(--bg-90); border: 1px solid var(--line); border-left: 2px solid var(--signal);
    font-family: var(--font-mono); font-size: .8rem; line-height: 1.65; color: var(--ink-2); overflow-x: auto; tab-size: 2; }
  .code .k { color: var(--ink); } .code .s { color: var(--mint); } .code .n { color: var(--signal); } .code .c { color: var(--ink-4); } .code .p { color: var(--ink-2); }
  .code-wrap { position: sticky; top: calc(var(--bar-h) + 24px); }
  .code-tabs { display: flex; gap: 18px; margin-bottom: 12px; font-family: var(--font-mono); font-size: .76rem; }
  .code-tabs button { padding: 6px 0; color: var(--ink-3); border-bottom: 1px solid transparent; }
  .code-tabs button[aria-pressed="true"] { color: var(--ink); border-color: var(--mint); }

  /* ----- forms (underline fields) ----- */
  .field { display: grid; gap: 4px; }
  .field span { font-family: var(--font-mono); font-size: .72rem; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-3); }
  .field input, .field select, .field textarea { width: 100%; padding: 10px 0; border: 0; border-bottom: 1px solid var(--line-strong); background: transparent; color: var(--ink); font: inherit; border-radius: 0; transition: border-color .2s; }
  .field textarea { min-height: 72px; resize: vertical; field-sizing: content; }
  .field :is(input, select, textarea):focus { outline: none; border-bottom-color: var(--mint); }
  .field select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--ink-3) 50%), linear-gradient(135deg, var(--ink-3) 50%, transparent 50%); background-position: calc(100% - 12px) 50%, calc(100% - 7px) 50%; background-size: 5px 5px; background-repeat: no-repeat; }
  .field select option { background: var(--bg); }
  .form-ok { display: none; padding: 14px 0; border-top: 1px solid var(--mint); color: var(--ink-2); font-size: .93rem; }
  form:has(.form-ok.is-on) .form-ok { display: block; }

  /* ----- stream (marquee) ----- */
  .stream { overflow: hidden; border-block: 1px solid var(--line); background: var(--bg-70); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
  .stream-track { display: flex; gap: 48px; width: max-content; padding: 12px 0; animation: flow 48s linear infinite; }
  .stream:hover .stream-track { animation-play-state: paused; }
  .stream-item { display: inline-flex; align-items: baseline; gap: 10px; font-family: var(--font-mono); font-size: .78rem; color: var(--ink-3); white-space: nowrap; }
  .stream-item b { color: var(--ink); font-weight: 500; font-size: .92rem; }
  .stream-item .up { color: var(--mint); }

  /* ----- timeline ----- */
  .timeline { border-top: 1px solid var(--line-strong); }
  .tl-item { display: grid; grid-template-columns: 96px 1fr; gap: 18px; padding: 14px 0; border-bottom: 1px solid var(--line); align-items: baseline; }
  .tl-item time { font-family: var(--font-mono); font-size: .78rem; color: var(--ink-3); }
  .tl-item p { color: var(--ink-2); font-size: .93rem; }
  .tl-item p b { color: var(--ink); font-weight: 560; }

  /* ----- ring gauge ----- */
  .ring { --v: 0; width: 96px; aspect-ratio: 1; border-radius: 50%; display: grid; place-items: center; position: relative; background: conic-gradient(var(--mint) calc(var(--v) * 1%), var(--line) 0); }
  .ring::before { content: ""; position: absolute; inset: 6px; border-radius: 50%; background: var(--bg); }
  .ring b { position: relative; font-family: var(--font-mono); font-size: 1.1rem; font-weight: 500; }
}

@layer sections {
  /* ----- hero ----- */
  .hero { position: relative; min-height: 100dvh; display: grid; align-items: end; padding-top: var(--bar-h); isolation: isolate; }
  .hero .scrim { position: absolute; inset: 0; z-index: -1; pointer-events: none;
    background: linear-gradient(180deg, color-mix(in oklch, var(--bg) 70%, transparent), transparent 20%, transparent 62%, var(--bg) 100%),
                radial-gradient(ellipse 50% 55% at 16% 72%, color-mix(in oklch, var(--bg) 80%, transparent), transparent 70%); }
  .hero-inner { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(320px, .8fr); gap: 40px; align-items: end; padding-bottom: 56px; pointer-events: none; }
  .hero-inner > * { pointer-events: auto; }
  .hero-copy { display: grid; gap: 22px; max-width: 720px; }
  .hero h1 { font-size: clamp(2.6rem, 6.2vw, 5.2rem); font-weight: 520; letter-spacing: -0.035em; line-height: .98; }
  .hero h1 .serif { font-size: 1.08em; color: var(--signal); }
  .hero .lede { font-size: clamp(1.05rem, 1.45vw, 1.22rem); max-width: 54ch; }
  .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

  /* HUD: a flat mono readout, square corners, no glass */
  .hud { position: relative; padding: 20px 22px 16px; background: var(--bg-90); border: 1px solid var(--line-strong); font-family: var(--font-mono); transition: border-color .4s; }
  .hud.is-live { border-color: var(--mint); }
  .hud-top { display: flex; justify-content: space-between; align-items: center; font-size: .7rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }
  .hud-status { display: inline-flex; align-items: center; gap: 8px; }
  .hud-status .dot { width: 7px; height: 7px; background: var(--ink-4); transition: background .3s; }
  .hud.is-live .hud-status .dot { background: var(--mint); animation: breathe 1.2s ease-in-out infinite; }
  .hud-money { margin-top: 14px; font-size: clamp(2.1rem, 3.2vw, 2.8rem); font-weight: 500; letter-spacing: -0.03em; line-height: 1; font-variant-numeric: tabular-nums; display: flex; align-items: baseline; gap: 6px; }
  .hud-money .cur { font-size: .55em; color: var(--mint); }
  .hud-sub { margin-top: 6px; font-size: .76rem; color: var(--ink-3); }
  .hud-rows { margin-top: 16px; display: grid; font-size: .76rem; }
  .hud-row { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; border-top: 1px solid var(--line); color: var(--ink-3); }
  .hud-row b { color: var(--ink-2); font-weight: 500; }
  .hud-foot { margin-top: 12px; font-size: .72rem; color: var(--ink-4); }
  .hud-spark { position: absolute; right: 20px; top: 50px; width: 110px; height: 34px; opacity: .9; }
  .hud-spark path { fill: none; stroke: var(--mint); stroke-width: 1.3; }

  /* ----- metrics strip ----- */
  .metrics { padding-block: 40px 0; }

  /* ----- inventory ----- */
  .format { grid-template-columns: 44px 1.2fr 1.6fr 120px 1fr 120px; }
  .geo-block { margin-top: 48px; }

  /* ----- quality ----- */
  .funnel { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line-strong); border-bottom: 1px solid var(--line); }
  .funnel-step { padding: 22px 20px 22px 0; border-right: 1px solid var(--line); display: grid; gap: 8px; }
  .funnel-step + .funnel-step { padding-left: 20px; }
  .funnel-step:last-child { border-right: 0; }
  .funnel-step .k { font-family: var(--font-mono); font-size: .7rem; color: var(--ink-3); letter-spacing: .1em; text-transform: uppercase; }
  .funnel-step .v { font-family: var(--font-mono); font-size: clamp(1.5rem, 2.4vw, 2.1rem); font-weight: 500; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
  .funnel-step .d { font-size: .86rem; color: var(--ink-2); }
  .funnel-step .bar { height: 2px; background: var(--line); overflow: hidden; margin-top: 6px; }
  .funnel-step .bar i { display: block; height: 100%; width: var(--w); background: var(--signal); animation: grow-x 1.2s var(--ease-out) both; }
  .funnel-step.is-drop .bar i { background: var(--warn); }
  .promise { grid-template-columns: 44px 1.1fr 2fr 150px; }

  /* ----- integration ----- */
  .steps { border-top: 1px solid var(--line-strong); counter-reset: step; }
  .step { display: grid; grid-template-columns: 52px 1fr; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--line); }
  .step::before { counter-increment: step; content: "0" counter(step); font-family: var(--font-mono); font-size: 1.4rem; font-weight: 500; color: var(--signal); letter-spacing: -0.04em; line-height: 1; }
  .step h3 { font-size: 1.05rem; font-weight: 560; }
  .step p { color: var(--ink-2); font-size: .93rem; margin-top: 6px; }
  .step .tags { font-family: var(--font-mono); font-size: .74rem; color: var(--ink-3); margin-top: 10px; }
  .integration-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 40px; align-items: start; min-width: 0; }
  .mid-cta { margin-top: 32px; }

  /* ----- numbers ----- */
  .dash { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 40px; align-items: start; }
  .kpis { border-top: 1px solid var(--line-strong); }
  .kpi { display: grid; grid-template-columns: 110px 1fr; gap: 16px; align-items: baseline; padding: 12px 0; border-bottom: 1px solid var(--line); }
  .kpi .v { font-family: var(--font-mono); font-size: 1.35rem; font-weight: 500; letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
  .kpi .l { font-size: .82rem; color: var(--ink-3); }
  .kpi-ring { display: flex; align-items: center; gap: 18px; padding: 16px 0; border-bottom: 1px solid var(--line); }
  .kpi-ring .t { font-weight: 560; }
  .verticals { border-top: 1px solid var(--line-strong); }
  .vrow { display: grid; grid-template-columns: 130px 1fr 56px; gap: 12px; align-items: center; font-size: .86rem; padding: 9px 0; border-bottom: 1px solid var(--line); }
  .vrow .track { height: 2px; background: var(--line); overflow: hidden; }
  .vrow .track i { display: block; height: 100%; width: var(--w); background: var(--signal); animation: grow-x 1s var(--ease-out) both; }
  .vrow .n { font-family: var(--font-mono); text-align: right; color: var(--ink-2); }

  /* ----- principles ----- */
  .principles { border-top: 1px solid var(--line-strong); }
  .principle { display: grid; grid-template-columns: 44px 1fr 1.2fr; gap: 24px; padding: 26px 0; border-bottom: 1px solid var(--line); align-items: baseline; }
  .principle .q { font-family: var(--font-serif); font-style: italic; font-size: clamp(1.4rem, 2vw, 1.8rem); line-height: 1.12; }
  .principle p { color: var(--ink-2); font-size: .93rem; }

  /* ----- advertisers ----- */
  .req-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px; }
  .req-grid h3 { font-size: 1.02rem; font-weight: 560; margin: 10px 0 16px; }

  /* ----- contact ----- */
  .contact-grid { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 48px; align-items: start; }
  .contact-side { display: grid; gap: 22px; }
  .contact-side .h2 { font-size: clamp(2rem, 3.8vw, 2.9rem); }
  .contact-links { border-top: 1px solid var(--line-strong); }
  .contact-links > * { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding: 12px 0; border-bottom: 1px solid var(--line); }
  .contact-links span { font-size: .8rem; color: var(--ink-3); }
  .contact-links b { font-family: var(--font-mono); font-weight: 500; }
  .contact-links a:hover b { color: var(--mint); }
  .form { display: grid; grid-template-columns: 1fr 1fr; gap: 22px 28px; }
  .form .full { grid-column: 1 / -1; }
  .form .actions { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 14px; align-items: center; justify-content: space-between; }

  /* ----- footer ----- */
  .footer { position: relative; border-top: 1px solid var(--line); padding-block: 36px; color: var(--ink-3); font-size: .84rem; background: var(--bg-90); }
  .footer-inner { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 18px; align-items: center; }
  .footer-links { display: flex; flex-wrap: wrap; gap: 18px; }
  .footer-links a:hover { color: var(--ink); }

  /* ----- scroll progress ----- */
  .progress { position: fixed; inset-inline: 0; top: 0; height: 1px; z-index: 70; background: var(--mint); transform-origin: left; scale: 0 1; }

  /* ----- responsive ----- */
  @media (width <= 1024px) {
    .topbar-links { display: none; }
    .menu-btn { display: grid; }
    .brand-sub { display: none; }
    .hero-inner { grid-template-columns: 1fr; padding-top: 28vh; }
    .hud { max-width: 460px; }
    .integration-grid, .dash, .contact-grid { grid-template-columns: minmax(0, 1fr); }
    .code-wrap { position: static; }
    .req-grid { grid-template-columns: minmax(0, 1fr); gap: 28px; }
    .figure { padding: 18px 12px 18px 0; }
    .span-5, .span-6, .span-7, .from-7, .from-6 { grid-column: 1 / -1; }
    .section::before, .section[data-side="right"]::before { background: color-mix(in oklch, var(--bg) 82%, transparent); }
    /* ledgers collapse to index + one column; every cell after the index lives in column 2 */
    .format { grid-template-columns: 36px minmax(0, 1fr) auto; }
    .format .desc, .format .bars { display: none; }
    .format .geos { grid-column: 2 / -1; }
    .promise { grid-template-columns: 36px minmax(0, 1fr); }
    .promise > :not(.idx) { grid-column: 2; }
    .principle { grid-template-columns: 36px minmax(0, 1fr); }
    .principle > :not(.idx) { grid-column: 2; }
  }
  @media (width <= 760px) {
    .topbar-cta .btn, .readout { display: none; }
    .figures { grid-template-columns: 1fr; border-bottom: 0; }
    .figure { border-right: 0; border-bottom: 1px solid var(--line); padding-left: 0; }
    .funnel { grid-template-columns: 1fr; }
    .funnel-step { border-right: 0; border-bottom: 1px solid var(--line); padding-left: 0; }
    .funnel-step:last-child { border-bottom: 0; }
    .form { grid-template-columns: 1fr; }
    .tl-item { grid-template-columns: 1fr; gap: 4px; }
    .vrow { grid-template-columns: 100px 1fr 50px; }
    .hero-inner { padding-top: 46vh; padding-bottom: 28px; gap: 24px; }
    .hero h1 { font-size: clamp(2.3rem, 11vw, 3rem); }
    .hud { max-width: none; }
    .hud-money { font-size: 2rem; }
    .hero .scrim { background: linear-gradient(180deg, color-mix(in oklch, var(--bg) 70%, transparent), transparent 18%, transparent 34%, color-mix(in oklch, var(--bg) 88%, transparent) 52%, var(--bg) 70%); }
    .hud-spark { display: none; }
    .chart { overflow-x: auto; overscroll-behavior-x: contain; padding-top: 44px; -webkit-overflow-scrolling: touch; }
    .chart svg { min-width: 640px; }
    .code { font-size: .74rem; }
    .format { grid-template-columns: minmax(0, 1fr) auto; }
    .format .idx { display: none; }
    .format .geos { grid-column: 1 / -1; }
    .promise { grid-template-columns: minmax(0, 1fr); }
    .promise > :not(.idx) { grid-column: 1; }
    .promise .idx { display: none; }
    .kpi { grid-template-columns: 88px minmax(0, 1fr); }
    .step { grid-template-columns: 40px minmax(0, 1fr); }
  }
}

@layer motion {
  @keyframes breathe { 50% { opacity: .35; } }
  @keyframes flow { to { translate: calc(-50% - 24px) 0; } }
  @keyframes grow-y { from { transform: scaleY(0); } }
  @keyframes grow-x { from { width: 0; } }
  @keyframes lift { from { opacity: 0; translate: 0 22px; } to { opacity: 1; translate: 0 0; } }
  @keyframes scale-x { to { scale: 1 1; } }

  @supports (animation-timeline: view()) {
    .enter { animation: lift .8s var(--ease-out) both; animation-timeline: view(); animation-range: entry 5% entry 40%; }
    .cascade > .enter { animation-range-start: entry calc(5% + var(--i, 0) * 24px); }
    .progress { animation: scale-x linear both; animation-timeline: scroll(root); }
  }
  @supports not (animation-timeline: view()) {
    .enter { opacity: 0; translate: 0 20px; transition: opacity .8s var(--ease-out), translate .8s var(--ease-out); }
    .cascade > .enter { transition-delay: calc(var(--i, 0) * 70ms); }
    .enter.is-here { opacity: 1; translate: 0 0; }
    .progress { display: none; }
  }

  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
    html { scroll-behavior: auto; }
    .enter { animation: none; opacity: 1; translate: none; }
    .stream-track { animation: none; }
  }
}