:root {
    --bg: #F6F7F7; --stage: #E6EBED; --surface: #FFFFFF; --stage-line: #CBD4D9;
    --divider: #E5E7E8; --border: #D9DCDE;
    --ink: #0E1417; --dim: #4A5D68; --mute: #788A94;
    --accent: #A75209; --accent-soft: #DAA06C2E; --hl: #DAA06C3D; --accent-line: #A7520980; --accent-g: var(--accent);
    --lab-ls: normal;
    --serif: 'Figtree', system-ui, sans-serif;
    --sans: 'Figtree', system-ui, sans-serif;
    --mono: 'IBM Plex Mono', ui-monospace, monospace;
    --gutter: 64px; --section: 96px; --header: 69px;
    --statement: 72px; --title: 56px; --beat: 56px; --lead: 20px; --desc: 18px; --chat: 22px;
    --ease: cubic-bezier(.2,.7,.1,1);
  }
  @media (max-width: 899px) {
    :root { --gutter: 24px; --section: 64px; --statement: 44px; --title: 40px; --beat: 34px; --lead: 16px; --desc: 16px; --chat: 18px; }
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  body { letter-spacing: -0.01em; background: var(--bg); color: var(--ink); font-family: var(--sans); -webkit-font-smoothing: antialiased; overflow-x: clip; }
  a { color: inherit; text-decoration: none; }
  button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
  .wrap { max-width: 1440px; margin: 0 auto; padding: 0 var(--gutter); }
  .label { font: 400 16px/1.4 var(--mono); letter-spacing: var(--lab-ls); text-transform: uppercase; color: var(--accent); }
  .title { font: 400 var(--title)/1.04 var(--serif); letter-spacing: -0.014em; }
  h1, h2, h3, .lead { text-wrap: pretty; }
  h2.title { text-wrap: balance; }
  .lead { font-size: var(--lead); line-height: 1.6; max-width: 700px; color: var(--dim); }
  .how .lead { max-width: 900px; }
  .head { display: flex; flex-direction: column; gap: 20px; }
  .btn { display: inline-flex; align-items: center; justify-content: center; gap: 9px; padding: 16px 26px; border-radius: 4px; font: 600 13px/1.4 var(--mono); letter-spacing: 1.4px; text-transform: uppercase; white-space: nowrap; transition: background .2s, color .2s, transform .2s var(--ease); }
  .btn-primary { background: var(--ink); color: #fff; border: 1px solid var(--ink); }
  .btn-primary:hover { background: #26323A; transform: scale(1.02); }
  .btn-secondary { border: 1px solid var(--ink); }
  .btn-secondary:hover { background: var(--ink); color: #fff; }
  .reveal { opacity: 0; transform: translateY(16px); transition: opacity .7s var(--ease), transform .7s var(--ease); transition-delay: var(--d, 0ms); }
  .reveal.in { opacity: 1; transform: none; }
  .site-header { position: sticky; top: 0; z-index: 50; background: var(--bg); border-bottom: 1px solid transparent; transition: border-color .3s; }
  .site-header.scrolled { border-bottom-color: var(--divider); }
  section[id] { scroll-margin-top: var(--header); }
  .site-header .wrap { display: flex; align-items: center; justify-content: space-between; height: var(--header); }
  .brand { display: flex; align-items: center; gap: 16px; }
  .lockup { display: flex; align-items: center; gap: 11px; }
  .mark { width: 26px; height: 26px; color: var(--ink); }
  .wordmark { font: 400 22px/1 'Geist', var(--sans); letter-spacing: -0.5px; }
  .chip { padding: 4px 7px; border: 1px solid var(--border); border-radius: 3px; font: 500 10px/1.2 var(--mono); letter-spacing: 1.4px; color: var(--mute); }
  .nav { display: flex; align-items: center; gap: 30px; font: 500 12px/1 var(--mono); letter-spacing: 1.4px; text-transform: uppercase; }
  .nav a { color: var(--mute); transition: color .2s; }
  .nav a[aria-current], .nav a:not(.cta):hover { color: var(--ink); }
  .nav .cta { background: var(--ink); color: #fff; padding: 13px 17px; border: 1px solid var(--ink); border-radius: 4px; font-weight: 600; transition: background .2s, color .2s, transform .2s var(--ease); }
  .nav .cta:hover { background: #26323A; transform: scale(1.02); }
  @media (prefers-reduced-motion: reduce) { .btn-primary:hover, .nav .cta:hover { transform: none; } }
  .header-actions { display: flex; align-items: center; gap: 8px; }
  .menu-toggle { display: none; align-items: center; justify-content: center; width: 40px; height: 40px; margin-right: -8px; color: var(--ink); }
  @media (max-width: 899px) { .nav a:not(.cta) { display: none; } .menu-toggle { display: inline-flex; } }
  @media (max-width: 479px) { .site-header .chip { display: none; } }
  @media (max-width: 359px) { .site-header .wordmark { display: none; } }
  .mobile-menu { position: fixed; inset: 0; z-index: 100; }
  .mobile-menu[hidden] { display: none !important; }
  .mm-backdrop { position: absolute; inset: 0; background: rgba(74, 93, 104, .4); opacity: 0; transition: opacity 220ms var(--ease); }
  .mm-panel { position: absolute; inset: 0 0 0 auto; width: min(86vw, 360px); background: var(--bg); display: flex; flex-direction: column; padding: 15px 24px 32px;
              transform: translateX(100%); transition: transform 240ms var(--ease); box-shadow: -16px 0 40px rgba(0, 0, 0, .08); }
  .mobile-menu[data-open='true'] .mm-backdrop { opacity: 1; }
  .mobile-menu[data-open='true'] .mm-panel { transform: none; }
  .mm-close { align-self: flex-end; width: 40px; height: 40px; display: inline-flex; align-items: center; justify-content: center; margin-right: -8px; color: var(--ink); }
  .mm-nav { margin-top: 24px; flex: 1; }
  .mm-nav ul { list-style: none; display: flex; flex-direction: column; gap: 18px; }
  .mm-link { font: 700 28px/1.2 var(--sans); letter-spacing: -0.025em; color: var(--ink); }
  .mm-link[aria-current] { color: var(--accent); }
  .mm-cta { margin-top: 32px; width: 100%; }
  @media (min-width: 900px) { .mobile-menu { display: none !important; } }
  @media (prefers-reduced-motion: reduce) { .mm-backdrop, .mm-panel { transition: none; } }
  .hero .wrap { display: grid; grid-template-columns: 540px 1fr; gap: 64px; align-items: center; padding-top: 84px; padding-bottom: 92px; }
  .hero h1 { font: 400 var(--statement)/1.0 var(--serif); letter-spacing: -0.014em; margin-bottom: 8px; }
  .hero-copy { display: flex; flex-direction: column; gap: 28px; }
  .ctas { display: flex; gap: 12px; padding-top: 8px; }
  .ctas .btn { min-width: 209px; }
  .hero-art { height: 429px; background: image-set(url("/research-assets/hero-watercolor-grey.0647bbdb6639a1e0-960.webp") 1x, url("/research-assets/hero-watercolor-grey.0647bbdb6639a1e0-1408.webp") 2x) center / 135% no-repeat;
              -webkit-mask-image: radial-gradient(ellipse 60% 62% at 52% 52%, #000 55%, transparent 100%); mask-image: radial-gradient(ellipse 60% 62% at 52% 52%, #000 55%, transparent 100%); }
  @media (max-width: 899px) {
    .hero .wrap { display: flex; flex-direction: column; align-items: stretch; gap: 28px; padding-top: 16px; padding-bottom: 64px; }
    .hero-copy { display: contents; }
    .hero-art { order: 0; height: 200px; } .hero h1 { order: 1; } .hero .lead { order: 2; }
    .ctas { order: 4; flex-direction: column; padding-top: 0; } .ctas .btn { width: 100%; }
  }
  .problem { position: relative; height: calc(var(--beats, 3) * 100svh); }
  .p-stage { position: sticky; top: var(--header); height: calc(100svh - var(--header)); overflow: hidden;
             background: color-mix(in srgb, var(--stage) calc(var(--tide, 0) * 100%), var(--bg)); }
  .p-top { position: absolute; top: 56px; left: 0; right: 0; display: flex; flex-direction: column; align-items: center; gap: 14px; }
  .p-progress { display: flex; gap: 6px; }
  .p-progress i { height: 2px; width: 14px; background: var(--stage-line); transition: width .4s var(--ease), background .4s; }
  .p-progress i.on { width: 28px; background: var(--accent-g); }
  .beats { position: absolute; inset: 0 auto 0 50%; transform: translateX(-50%); width: min(1080px, calc(100% - 2 * var(--gutter))); }
  .beat { position: absolute; top: 0; left: 0; right: 0; font: 400 var(--beat)/1.06 var(--serif); letter-spacing: -0.014em; text-align: center; will-change: transform, opacity; }
  .beat .c { opacity: calc(clamp(0.18, calc((var(--reveal-progress, 0) * var(--char-count, 1) - var(--char-index, 0)) * 12), 1) * (1 - var(--fade, 0) * 0.82)); }
  .gallery { background: var(--stage); padding: var(--section) 0; }
  .gallery .head { margin-bottom: 40px; }
  .track { --inset: max(var(--gutter), calc((100vw - 1440px) / 2 + var(--gutter)));
           display: flex; gap: 20px; overflow-x: auto; scroll-snap-type: x mandatory; scroll-padding-left: var(--inset);
           padding: 4px var(--inset) 8px; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
  .track::-webkit-scrollbar { display: none; }
  .card { flex: 0 0 430px; height: 290px; scroll-snap-align: start; display: grid; grid-template-rows: auto 1fr; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; overflow: hidden;
          opacity: 0; transition: opacity .7s var(--ease); transition-delay: var(--d, 0ms); }
  .gallery.in .card { opacity: 1; }
  .card > div { padding: 22px 28px; display: flex; flex-direction: column; gap: 10px; }
  .card .short { display: none; }
  @media (max-width: 429px) { .card .long { display: none; } .card .short { display: inline; } }
  .card .em { background: var(--accent-soft); }
  .card .lab { font: 500 11px/1.4 var(--mono); letter-spacing: var(--lab-ls); color: var(--accent); }
  .card .q { font: 400 var(--chat)/1.4 var(--serif); color: var(--dim); }
  .card .e { font: 400 var(--chat)/1.4 var(--serif); }
  @media (max-width: 899px) { .track { gap: 12px; } .card { flex-basis: 300px; height: 286px; } .card > div { padding: 18px 20px; gap: 8px; }  }
  @media (min-width: 700px) and (max-width: 899px) { .card { flex-basis: 430px; } .card > div { padding: 22px 28px; } }
  .card { height: auto; }
  .card > div { padding-bottom: 20px !important; }
  @media (max-width: 699px) { .card > div { padding-bottom: 16px !important; } }
  @media (max-width: 699px) { .card { flex-basis: min(430px, calc(100vw - 56px)); } .card > div { padding: 18px 16px; } }
  .hl { background-image: linear-gradient(var(--hl), var(--hl)); background-repeat: no-repeat; background-size: calc(var(--g, 0) * 100%) 100%;
        border-radius: 3px; padding: 0 2px; margin: 0 -2px; -webkit-box-decoration-break: slice; box-decoration-break: slice; transition: background-size .8s var(--ease); }
  .hl-a { padding-right: 0; margin-right: 0; border-top-right-radius: 0; border-bottom-right-radius: 0; }
  .hl-b { padding-left: 0; margin-left: 0; border-top-left-radius: 0; border-bottom-left-radius: 0; }
  .g-nav { display: flex; gap: 10px; margin-top: 24px; }
  .g-nav button { width: 40px; height: 40px; border-radius: 20px; display: grid; place-items: center; border: 1px solid var(--border); background: var(--surface); transition: opacity .2s; }
  .g-nav button.next { background: var(--ink); border-color: var(--ink); color: #fff; }
  .g-nav button:disabled { opacity: .3; cursor: default; }
  .how.static *, .how.static *::before, .how.static *::after { transition: none !important; animation: none !important; }
  .how.static .reveal { opacity: 1; transform: none; }
  .how { background: var(--stage); padding: var(--section) 0; }
  .how .head { margin-bottom: 40px; }
  .demo { position: relative; display: grid; grid-template-columns: 660px 1fr; gap: 120px; align-items: center; }
  .win { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; overflow: hidden; box-shadow: 0 2px 6px #0E141712, 0 10px 28px #0E141714; }
  .wbar { padding: 14px 24px; border-bottom: 1px solid var(--divider); font: 500 11px/1.4 var(--mono); letter-spacing: 1.4px; color: var(--dim); }
  .stream { display: flex; flex-direction: column; gap: 18px; padding: 24px 32px 28px; }
  .who { font: 500 11px/1.4 var(--mono); letter-spacing: var(--lab-ls); color: var(--ink); margin-bottom: 6px; }
  .who.k { color: var(--accent); }
  .bubble { padding: 18px 26px 20px; font: 400 var(--chat)/1.4 var(--serif); border-radius: 4px 14px 14px 14px; }
  .bubble.p { background: var(--bg); }
  .bubble.k { background: var(--accent-soft); position: relative; }
  .kmsg { opacity: 0; transform: translateY(10px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
  .kmsg.on { opacity: 1; transform: none; }
  @keyframes pulse { 50% { opacity: .25; } }
  .badge { display: inline-grid; place-items: center; width: 19px; height: 19px; margin-left: 6px; border-radius: 10px; background: var(--accent); color: #fff; font: 600 10px/1 var(--mono);
           vertical-align: .12em; overflow: hidden; transform: scale(0); transition: width .4s var(--ease), margin .4s var(--ease), transform .45s cubic-bezier(.3,1.6,.5,1); }
  .badge.on { transform: scale(1); }
  .ch { opacity: 0; }
  .ch.on { opacity: 1; }
  .nb { white-space: nowrap; }
  .panel { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; box-shadow: 0 2px 6px #0E141712, 0 10px 28px #0E141714; overflow: hidden; }
  .panel .wbar { padding: 14px 24px; display: flex; align-items: center; gap: 8px; }
  .panel .wbar::before { content: ''; width: 7px; height: 7px; border-radius: 4px; background: var(--accent-g); }
  .steps { display: flex; flex-direction: column; gap: 22px; padding: 22px 24px 24px; }
  .step { display: grid; grid-template-columns: 19px 1fr; gap: 14px; }
  .step .badge { width: 19px; margin: 3px 0 0; transform: scale(1); opacity: .35; transition: opacity .4s; }
  .step:is(.t, .on) .badge { opacity: 1; }
  .step .cat { font-size: 17px; line-height: 1.4; font-weight: 500; color: var(--accent); }
  .step .txt { font-size: 16px; line-height: 1.5; margin-top: 2px; }
  .step .cat { opacity: 0; transition: opacity .5s var(--ease); }
  .step:is(.t, .on) .cat { opacity: 1; }
  .step .skel { position: absolute; inset: 4px 0 auto; display: flex; flex-direction: column; gap: 9px; transition: opacity .4s; }
  .step .skel i { height: 10px; border-radius: 5px; background: linear-gradient(90deg, #F1F3F4, #E7EAEC, #F1F3F4); background-size: 200% 100%; animation: shimmer 1.4s linear infinite; }
  .step .skel i:nth-child(1) { width: 55%; }
  .step .skel i:nth-child(2) { width: 92%; }
  .step .skel i:nth-child(3) { width: 70%; }
  .step .skel i { transition: opacity .4s; }
  .step:is(.t, .on) .skel i:nth-child(1) { opacity: 0; }
  .step:is(.w, .on) .skel { opacity: 0; }
  .step > div { position: relative; }
  @keyframes shimmer { to { background-position: -200% 0; } }
  .links { position: absolute; inset: 0; pointer-events: none; overflow: visible; }
  .links path { fill: none; stroke: var(--accent-g); stroke-width: 1.3; stroke-dasharray: 1; stroke-dashoffset: 1; transition: stroke-dashoffset .8s var(--ease); }
  .links path.on { stroke-dashoffset: 0; }
  .demo-m { display: none; }
  @media (max-width: 899px) {
    .hero-art {
        background-image: image-set(url("/research-assets/hero-watercolor-grey.0647bbdb6639a1e0-480.webp") 1x, url("/research-assets/hero-watercolor-grey.0647bbdb6639a1e0-960.webp") 2x);
    }
}