/* Self-hosted fonts (SIL Open Font License, see fonts/LICENSES-OFL.txt) */
@font-face{font-family:"Newsreader";font-style:normal;font-display:swap;font-weight:200 800;src:url(fonts/newsreader-latin-opsz-normal.woff2) format("woff2-variations"),url(fonts/newsreader-latin-opsz-normal.woff2) format("woff2")}
@font-face{font-family:"Newsreader";font-style:italic;font-display:swap;font-weight:200 800;src:url(fonts/newsreader-latin-opsz-italic.woff2) format("woff2-variations"),url(fonts/newsreader-latin-opsz-italic.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-display:swap;font-weight:400;src:url(fonts/ibm-plex-sans-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-display:swap;font-weight:500;src:url(fonts/ibm-plex-sans-latin-500-normal.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Sans";font-style:normal;font-display:swap;font-weight:600;src:url(fonts/ibm-plex-sans-latin-600-normal.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-display:swap;font-weight:400;src:url(fonts/ibm-plex-mono-latin-400-normal.woff2) format("woff2")}
@font-face{font-family:"IBM Plex Mono";font-style:normal;font-display:swap;font-weight:500;src:url(fonts/ibm-plex-mono-latin-500-normal.woff2) format("woff2")}
@font-face{font-family:"Space Grotesk";font-style:normal;font-display:swap;font-weight:500;src:url(fonts/space-grotesk-latin-500-normal.woff2) format("woff2")}

/* Layout: ink frame (hero + close) around a sticky paper "sketchbook" stage that draws itself on scroll.
   Single deliberate look (brand v0.3 sketchbook expression) – colours set explicitly, no theme switch. */
:root{
  color-scheme: light;
  --ink:#0B0E11; --graphite:#151A1F; --slate:#4A555E; --mist:#93A0A8; --line:#DCDCDE;
  --paper:#F4F4F5; --paper-2:#E8E8EA; --on-ink:#EDEEEF;
  --lead:#2E353B;                 /* pencil graphite */
  --bullion:#C58A45; --bullion-deep:#8A5A24;
  --token:#F2B33D;   --token-deep:#A9761A;
  --broker:#2F8FFF;
  --venue:#7A6CF5;
  --font-display:"Newsreader", "Iowan Old Style", Georgia, serif;
  --font-mark:"Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-body:"IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --font-mono:"IBM Plex Mono", Consolas, "Courier New", monospace;
  --gutter-l:max(16px, env(safe-area-inset-left, 0px));
  --gutter-r:max(16px, env(safe-area-inset-right, 0px));
}
*{box-sizing:border-box}
html{background:var(--ink)}
body{background:var(--paper);color:var(--ink);font-family:var(--font-body);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased}
.wrap{max-width:1240px;margin:0 auto;padding-left:var(--gutter-l);padding-right:var(--gutter-r)}
.mono{font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;text-transform:uppercase}

/* ---- top bar ---- */
.bar{background:var(--ink);color:var(--on-ink)}
.bar .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:18px}
.brand{display:flex;align-items:center;gap:12px;font-family:var(--font-mark);font-weight:500;font-size:20px;letter-spacing:-.01em;color:var(--on-ink);text-decoration:none}
.brand svg{width:26px;height:26px}
.bar-right{display:flex;align-items:center;gap:20px}
.draft{color:var(--mist)}
.bar a.ask{color:var(--on-ink);text-decoration:none;border-bottom:1px solid var(--slate);padding-bottom:2px;font-size:14px}
.bar a.ask:hover,.bar a.ask:focus-visible{border-color:var(--on-ink)}

/* ---- hero ---- */
.hero{background:var(--ink);color:var(--on-ink)}
.hero .wrap{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,4fr);gap:48px;padding-block:72px 88px;align-items:end}
.hero h1{font-family:var(--font-display);font-optical-sizing:auto;font-weight:400;font-size:clamp(42px,6.8vw,96px);line-height:1;letter-spacing:-.02em;margin:0;text-wrap:balance}
.hero h1 em{font-style:italic;color:#D8DDE0}
.hero p{margin:0;color:#B9C1C6;max-width:38ch}
.hero .lede{display:flex;flex-direction:column;gap:16px}
.roster{display:flex;flex-wrap:wrap;gap:8px 18px;color:var(--mist)}
.roster span{display:inline-flex;align-items:center;gap:8px}
.roster i{width:9px;height:9px;display:inline-block;border:1px solid var(--mist)}
.scrollcue{color:var(--mist);display:flex;align-items:center;gap:10px}
.scrollcue::after{content:"";width:46px;height:1px;background:var(--slate)}

/* ---- chapter / sticky stage ---- */
.chapter + .chapter{border-top:1px solid var(--line)}
.chapter.finale{height:460vh}
.chapter{position:relative;height:720vh;background:var(--paper);background-image:var(--grain)}
.stage{position:sticky;top:0;height:100vh;height:100svh;overflow:hidden}
.stage .wrap{height:100%;display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:40px;align-items:center;padding-block:32px}
.drawing{position:relative;min-width:0}
.drawing svg{display:block;width:100%;height:auto;max-height:calc(100svh - 120px);overflow:visible}
.notes{position:relative;min-width:0;align-self:stretch;display:flex;flex-direction:column;justify-content:center}
.steps{position:relative;min-height:440px}
.step{position:absolute;inset:0 0 auto 0;opacity:0;transform:translateY(14px);transition:opacity .45s ease,transform .45s ease;pointer-events:none}
.step.on{opacity:1;transform:none;pointer-events:auto}
.step .k{color:var(--slate);display:block;margin-bottom:14px}
.step h2{font-family:var(--font-display);font-weight:400;font-size:clamp(28px,2.9vw,42px);line-height:1.08;letter-spacing:-.01em;margin:0 0 14px;text-wrap:balance}
.step p{margin:0 0 12px;color:var(--slate);max-width:40ch}
.pair{display:grid;gap:12px;margin-top:6px}
.pair div{border-top:1px solid var(--line);padding-top:10px;max-width:42ch}
.pair b{font-weight:600;color:var(--ink)}
.pair .sw{display:inline-block;width:10px;height:10px;margin-right:8px;vertical-align:baseline}
.meter{display:flex;gap:28px;color:var(--slate);border-top:1px solid var(--ink);padding-top:12px;margin-top:28px;font-variant-numeric:tabular-nums}
.meter b{color:var(--ink);font-weight:500}
.progress{position:absolute;left:0;bottom:0;height:2px;background:var(--ink);width:0}

/* svg pencil */
.sk path{fill:none;stroke-linecap:round;stroke-linejoin:round}
.sk .fill{stroke:none}
.sk .acc{mix-blend-mode:multiply}
.sk text{font-family:var(--font-mono);letter-spacing:.12em;fill:var(--slate)}
.sk .fig{font-size:20px}
.sk .note{transition:opacity .4s}
.tip{fill:var(--lead);opacity:0;transition:opacity .2s}

/* ---- close ---- */
.close{background:var(--ink);color:var(--on-ink)}
.close .wrap{display:grid;grid-template-columns:minmax(0,6fr) minmax(0,5fr);gap:48px;padding-block:96px}
.close h2{font-family:var(--font-display);font-weight:400;font-size:clamp(34px,4.8vw,66px);line-height:1.02;letter-spacing:-.015em;margin:0 0 20px;text-wrap:balance}
.close p{color:#B9C1C6;max-width:46ch;margin:0 0 14px}
.seal{width:76px;height:76px;margin-bottom:28px;color:var(--on-ink)}
.cta{border:1px solid var(--slate);padding:28px;display:flex;flex-direction:column;gap:18px;align-self:start}
.cta .btn{display:inline-flex;align-items:center;justify-content:space-between;gap:16px;background:var(--on-ink);color:var(--ink);text-decoration:none;font-weight:600;padding:16px 20px;border-radius:3px}
.cta .btn:hover,.cta .btn:focus-visible{background:#fff}
.cta .btn span{font-family:var(--font-mono)}
.addr{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.addr code{font-family:var(--font-mono);font-size:15px;color:var(--on-ink);user-select:all}
.addr button{font:inherit;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;background:none;color:var(--mist);border:1px solid var(--slate);border-radius:3px;padding:6px 10px;cursor:pointer}
.addr button:hover,.addr button:focus-visible{color:var(--on-ink);border-color:var(--mist)}
.cta small{color:var(--mist);font-size:13px;line-height:1.5}
.fine{border-top:1px solid var(--graphite)}
.fine .wrap{padding-block:22px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;color:var(--slate);font-size:13px}
a:focus-visible,button:focus-visible{outline:2px solid var(--mist);outline-offset:3px}

/* ---- narrow ---- */
@media (max-width:860px){
  .hero .wrap,.close .wrap{grid-template-columns:minmax(0,1fr);gap:32px;padding-block:48px 64px}
  .stage .wrap{grid-template-columns:minmax(0,1fr);grid-template-rows:auto 1fr;gap:18px;align-items:start;padding-block:20px}
  .drawing{order:-1}
  .drawing svg{max-height:44svh}
  .steps{min-height:390px}
  .notes{justify-content:flex-start}
  .pair{gap:6px}
  .pair div{padding-top:6px;font-size:14px;line-height:1.45}
  .step p{font-size:15px}
  .meter{margin-top:14px}
  .draft{display:none}
}
/* ---- reduced motion: finished drawing, all notes in order ---- */
@media (prefers-reduced-motion: reduce){
  .chapter{height:auto}
  .stage{position:static;height:auto;overflow:visible}
  .steps{min-height:0;display:grid;gap:28px}
  .step{position:static;opacity:1;transform:none}
  .progress{display:none}
}

html,body{margin:0}
img{max-width:100%}
.sw-bullion{background:var(--bullion)}.sw-token{background:var(--token)}.sw-broker{background:var(--broker)}.sw-venue{background:var(--venue)}.sw-compliance{background:#00C383}
.cta .mono{color:var(--mist)}
/* without JavaScript: no drawing, all notes in order */
.no-js .chapter{height:auto}
.no-js .stage{position:static;height:auto;overflow:visible}
.no-js .drawing{display:none}
.no-js .steps{min-height:0;display:grid;gap:28px;padding-block:48px}
.no-js .step{position:static;opacity:1;transform:none}
.no-js .meter,.no-js .progress{display:none}
/* 404 */
body.nf{background:var(--ink);color:var(--on-ink);min-height:100vh;min-height:100svh;display:flex;align-items:center}
.nf-main{max-width:720px;margin:0 auto;padding-block:64px;padding-left:max(24px, env(safe-area-inset-left, 0px));padding-right:max(24px, env(safe-area-inset-right, 0px));display:flex;flex-direction:column;gap:18px}
.nf-main .mono{color:var(--mist)}
.nf-main h1{font-family:var(--font-display);font-weight:400;font-size:clamp(36px,5.4vw,64px);line-height:1.04;letter-spacing:-.015em;margin:0;text-wrap:balance}
.nf-main p{color:#B9C1C6;margin:0;max-width:44ch}
.nf-link{align-self:flex-start;margin-top:12px;color:var(--on-ink);text-decoration:none;border-bottom:1px solid var(--slate);padding-bottom:3px}
.nf-link:hover,.nf-link:focus-visible{border-color:var(--on-ink)}