/* ==========================================================================
   QuantumPools Docs — shared design system  (docs.css v1)
   Light, airy, restrained. System fonts only. No external resources.
   Every page: <link rel="stylesheet" href="/docs/docs.css?v=1">
   ========================================================================== */

:root{
  /* palette */
  --page:#f6f8fb;
  --surface:#ffffff;
  --surface-2:#f9fbfd;
  --ink:#0f1a30;
  --ink-2:#27354d;
  --muted:#52627a;
  --faint:#66738a;
  --line:#e3e8f0;
  --line-2:#d3dbe7;
  --brand:#1f6dff;
  --brand-ink:#1557d6;
  --brand-soft:#eaf1ff;
  --brand-soft-2:#d6e4ff;
  --brand-mid:#5b93ff;
  --brand-light:#9dbcff;
  --gold:#b8860b;
  --gold-soft:#fbf4e2;
  --gold-ink:#8f6a08;
  --green:#16a36a;
  --green-soft:#e6f6ee;
  --green-ink:#0f7a4f;
  --red:#d2453f;
  --red-soft:#fcecea;
  --red-ink:#b93a35;
  --amber:#c47f00;
  --amber-soft:#fdf3df;
  --amber-ink:#9a6300;

  /* type */
  --font:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --measure:68ch;

  /* shape + depth */
  --r-sm:8px;
  --r:12px;
  --r-lg:16px;
  --shadow-1:0 1px 2px rgba(15,26,48,.05);
  --shadow-2:0 1px 2px rgba(15,26,48,.04),0 8px 24px -12px rgba(15,26,48,.14);
  --shadow-3:0 2px 4px rgba(15,26,48,.05),0 18px 40px -18px rgba(31,109,255,.28);

  /* layout */
  --topbar-h:60px;
  --side-w:248px;
  --toc-w:216px;
  --main-max:780px;
  --ease:cubic-bezier(.2,.7,.2,1);
}

/* ---------- base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--topbar-h) + 20px)}
body{
  margin:0;min-height:100vh;background:var(--page);color:var(--ink);
  font-family:var(--font);font-size:16px;line-height:1.65;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img,svg{max-width:100%}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-ink);text-decoration:underline;text-underline-offset:3px}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:var(--brand-soft-2)}
b,strong{font-weight:650;color:var(--ink)}
hr{border:0;border-top:1px solid var(--line);margin:40px 0}
code,kbd{font-family:var(--mono);font-size:.88em}
code{background:var(--brand-soft);color:var(--brand-ink);padding:.12em .4em;border-radius:6px}
kbd{background:var(--surface);border:1px solid var(--line-2);border-bottom-width:2px;padding:.05em .4em;border-radius:5px}
.skip{position:absolute;left:-999px;top:8px;z-index:100;background:var(--ink);color:#fff;padding:8px 12px;border-radius:8px}
.skip:focus{left:12px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- reading progress ---------- */
.progress{position:fixed;inset:0 0 auto 0;height:3px;z-index:60;pointer-events:none}
.progress span{display:block;height:100%;width:100%;transform-origin:0 50%;transform:scaleX(0);
  background:linear-gradient(90deg,var(--brand),#5b9bff)}

/* ---------- top bar ---------- */
.topbar{
  position:sticky;top:0;z-index:50;height:var(--topbar-h);
  background:rgba(255,255,255,.86);backdrop-filter:saturate(1.6) blur(12px);-webkit-backdrop-filter:saturate(1.6) blur(12px);
  border-bottom:1px solid var(--line);
}
.topbar-inner{max-width:1400px;margin:0 auto;height:100%;padding:0 24px;display:flex;align-items:center;gap:20px}
.wordmark{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:750;letter-spacing:-.01em;font-size:17px;white-space:nowrap}
.wordmark:hover{text-decoration:none;color:var(--ink)}
.wordmark img{width:28px;height:28px;border-radius:7px;display:block}
.wordmark .wm-docs{font-size:11px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--brand);
  background:var(--brand-soft);border-radius:999px;padding:3px 8px}
.toplinks{display:flex;align-items:center;gap:4px;margin-left:auto}
.toplinks a{color:var(--muted);font-size:14px;font-weight:550;padding:7px 11px;border-radius:8px;white-space:nowrap}
.toplinks a:hover{color:var(--ink);background:var(--page);text-decoration:none}
.toplinks a.is-cta{color:#fff;background:var(--brand);margin-left:6px}
.toplinks a.is-cta:hover{background:var(--brand-ink);color:#fff}
.menu-btn{display:none;margin-left:auto;align-items:center;gap:8px;border:1px solid var(--line-2);background:var(--surface);
  color:var(--ink);font:inherit;font-size:14px;font-weight:600;padding:7px 12px;border-radius:9px;cursor:pointer}
.menu-btn svg{width:18px;height:18px}
.menu-btn .i-close{display:none}
.nav-open .menu-btn .i-open{display:none}
.nav-open .menu-btn .i-close{display:block}

/* ---------- shell: sidebar | main | toc ---------- */
.shell{
  max-width:1400px;margin:0 auto;padding:0 24px;
  display:grid;grid-template-columns:var(--side-w) minmax(0,1fr) var(--toc-w);gap:48px;
}
.sidebar{position:sticky;top:var(--topbar-h);align-self:start;max-height:calc(100vh - var(--topbar-h));overflow-y:auto;
  padding:28px 4px 40px 0;scrollbar-width:thin}
.side-title{font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--faint);margin:0 0 10px 12px}
.side-list{list-style:none;margin:0 0 24px;padding:0}
.side-list li{margin:0 0 2px}
.side-link{display:flex;align-items:center;gap:11px;padding:8px 12px;border-radius:10px;color:var(--ink-2);font-size:14.5px;font-weight:550;
  transition:background .15s,color .15s}
.side-link:hover{background:var(--surface);color:var(--ink);text-decoration:none}
.side-num{flex:none;width:22px;height:22px;border-radius:7px;display:grid;place-items:center;font-size:11.5px;font-weight:700;
  background:var(--surface);border:1px solid var(--line);color:var(--muted);transition:all .15s}
.side-link.is-active{background:var(--brand-soft);color:var(--brand-ink)}
.side-link.is-active .side-num{background:var(--brand);border-color:var(--brand);color:#fff}
.side-mobile-only{display:none}
.side-note{margin:8px 12px 0;padding:12px 14px;border-radius:var(--r);background:var(--surface);border:1px solid var(--line);font-size:13px;color:var(--muted);line-height:1.5}
.side-note a{font-weight:600}

.main{min-width:0;max-width:var(--main-max);width:100%;padding:44px 0 72px}
.main > section{margin:0 0 56px}
.main > section:last-of-type{margin-bottom:24px}

.toc{position:sticky;top:var(--topbar-h);align-self:start;max-height:calc(100vh - var(--topbar-h));overflow-y:auto;padding:44px 0 40px}
.toc-title{font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--faint);margin:0 0 12px}
.toc ul{list-style:none;margin:0;padding:0;border-left:1px solid var(--line)}
.toc li a{display:block;margin-left:-1px;border-left:2px solid transparent;padding:5px 0 5px 14px;font-size:13.5px;color:var(--muted);line-height:1.4;transition:color .15s,border-color .15s}
.toc li.toc-h3 a{padding-left:26px;font-size:13px}
.toc li a:hover{color:var(--ink);text-decoration:none}
.toc li a.is-active{color:var(--brand-ink);border-left-color:var(--brand);font-weight:600}
.toc.is-empty{visibility:hidden}

/* ---------- typography inside main ---------- */
.main h1{font-size:clamp(30px,4.2vw,42px);line-height:1.12;letter-spacing:-.025em;margin:0 0 14px;font-weight:780}
.main h2{font-size:clamp(22px,2.6vw,27px);line-height:1.25;letter-spacing:-.018em;margin:0 0 14px;font-weight:740;scroll-margin-top:calc(var(--topbar-h) + 20px)}
.main h3{font-size:18px;line-height:1.35;letter-spacing:-.01em;margin:28px 0 8px;font-weight:700;scroll-margin-top:calc(var(--topbar-h) + 20px)}
.main h4{font-size:15px;margin:20px 0 6px;font-weight:700}
.main p,.main ul,.main ol{max-width:var(--measure)}
.main p{margin:0 0 16px;color:var(--ink-2)}
.main ul,.main ol{margin:0 0 16px;padding-left:22px;color:var(--ink-2)}
.main li{margin:0 0 6px}
.main li::marker{color:var(--brand)}
.lead{font-size:18.5px;line-height:1.6;color:var(--muted)}
.muted{color:var(--muted)}
.small{font-size:13.5px}
.nowrap{white-space:nowrap}
.pos{color:var(--green);font-weight:650}
.neg{color:var(--red);font-weight:650}
.hl{background:linear-gradient(transparent 58%,var(--brand-soft-2) 58%);padding:0 2px}
.anchor{opacity:0;margin-left:8px;color:var(--faint);font-weight:500;transition:opacity .15s}
.main h2:hover .anchor,.main h3:hover .anchor{opacity:1}
.anchor:hover{text-decoration:none;color:var(--brand)}

/* kicker (gold, sparing) */
.kicker{display:inline-flex;align-items:center;gap:8px;font-size:11.5px;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--gold-ink);margin:0 0 10px}
.kicker::before{content:"";width:18px;height:2px;border-radius:2px;background:currentColor;opacity:.7}

/* section header helper: <div class="sec-head"><span class="kicker">01 · Idea</span><h2>…</h2></div> */
.sec-head{margin-bottom:6px}

/* ---------- hero ---------- */
.hero{position:relative;margin:0 0 44px;padding:34px 34px 30px;border-radius:20px;background:var(--surface);border:1px solid var(--line);
  box-shadow:var(--shadow-2);overflow:hidden;isolation:isolate}
.hero::before{content:"";position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(520px 220px at 100% 0%,rgba(31,109,255,.10),transparent 70%),
    radial-gradient(360px 180px at 0% 100%,rgba(184,134,11,.07),transparent 70%)}
.hero::after{content:"";position:absolute;right:-40px;top:-40px;width:220px;height:220px;z-index:-1;opacity:.5;
  background-image:radial-gradient(var(--brand-soft-2) 1.2px,transparent 1.3px);background-size:14px 14px;
  -webkit-mask-image:radial-gradient(closest-side,#000,transparent);mask-image:radial-gradient(closest-side,#000,transparent)}
.hero h1{margin-bottom:12px}
.hero .lead{margin:0;max-width:60ch}
.hero-meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:20px}
.hero-meta .meta{font-size:13px;color:var(--muted);display:inline-flex;align-items:center;gap:6px}
.hero-meta .meta svg{width:15px;height:15px;color:var(--faint)}

/* TL;DR summary box */
.tldr{border:1px solid var(--line);border-left:4px solid var(--brand);background:var(--surface);border-radius:var(--r);padding:18px 22px;margin:0 0 32px;box-shadow:var(--shadow-1)}
.tldr-title{font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--brand);margin:0 0 8px}
.tldr ul{margin:0;padding-left:20px}
.tldr li{margin:0 0 6px}
.tldr li:last-child{margin:0}

/* ---------- callouts ---------- */
.callout{--c:var(--brand);--c-soft:var(--brand-soft);
  display:grid;grid-template-columns:22px minmax(0,1fr);gap:12px;align-items:start;
  margin:22px 0;padding:16px 18px;border-radius:var(--r);background:var(--c-soft);border:1px solid color-mix(in srgb,var(--c) 18%,transparent)}
.callout-icon{width:22px;height:22px;color:var(--c);margin-top:1px}
.callout-icon svg{width:22px;height:22px;display:block}
.callout-title{display:block;font-weight:700;color:var(--ink);margin:0 0 3px;font-size:15px}
.callout-body{font-size:15px;color:var(--ink-2)}
.callout-body p{margin:0 0 8px;max-width:none}
.callout-body p:last-child,.callout-body ul:last-child{margin-bottom:0}
.callout.info{--c:var(--brand);--c-soft:var(--brand-soft)}
.callout.tip{--c:var(--green);--c-soft:var(--green-soft)}
.callout.warning{--c:var(--amber);--c-soft:var(--amber-soft)}
.callout.danger{--c:var(--red);--c-soft:var(--red-soft)}

/* ---------- step cards ---------- */
.steps{list-style:none;counter-reset:step;margin:22px 0;padding:0;display:grid;gap:12px;max-width:none!important}
.steps > li{counter-increment:step;position:relative;margin:0;padding:18px 20px 18px 66px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow-1);transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s;min-width:0}
.steps > li::before{content:counter(step);position:absolute;left:18px;top:17px;width:32px;height:32px;border-radius:10px;
  display:grid;place-items:center;font-weight:750;font-size:14.5px;color:#fff;background:var(--brand);box-shadow:0 4px 10px -4px rgba(31,109,255,.6)}
.steps > li:not(:last-child)::after{content:"";position:absolute;left:33px;top:54px;bottom:-14px;width:2px;background:var(--brand-soft-2);border-radius:2px}
.steps > li:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--line-2)}
.steps h3,.steps h4{margin:3px 0 4px;font-size:16.5px}
.steps p{margin:0 0 6px;font-size:15px}
.steps p:last-child{margin:0}

/* horizontal flow chips: A → B → C */
.flow{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:18px 0;padding:0;list-style:none;max-width:none!important}
.flow li{margin:0;display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--ink-2)}
.flow li span{background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:6px 13px;box-shadow:var(--shadow-1)}
.flow li:not(:last-child)::after{content:"";width:18px;height:2px;background:var(--line-2);position:relative}
.flow li.is-key span{background:var(--brand-ink);border-color:var(--brand-ink);color:#fff}

/* ---------- figures + inline SVG diagrams ---------- */
.figure{margin:26px 0;padding:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-1);overflow:hidden}
.figure-art{padding:22px 22px 14px;background:linear-gradient(180deg,var(--surface) 0%,var(--surface-2) 100%)}
.figure svg{width:100%;height:auto;display:block;overflow:visible}
.figure figcaption{padding:12px 20px 14px;border-top:1px solid var(--line);font-size:13.5px;color:var(--muted);line-height:1.5}
.figure figcaption b{color:var(--ink)}
.figure.bare{background:none;border:0;box-shadow:none}
.figure.bare .figure-art{padding:0;background:none}
.figure.bare figcaption{border:0;padding:10px 0 0;text-align:center}
.legend{display:flex;flex-wrap:wrap;gap:14px;margin:10px 0 0;padding:0;list-style:none;font-size:12.5px;color:var(--muted)}
.legend li{display:inline-flex;align-items:center;gap:6px;margin:0}
.legend i{width:10px;height:10px;border-radius:3px;background:var(--c,var(--brand));display:inline-block}

/* SVG helpers (CSS variables do not work in presentation attributes — use these classes) */
.f-brand{fill:var(--brand)} .f-brand-soft{fill:var(--brand-soft)} .f-brand-soft-2{fill:var(--brand-soft-2)}
.f-gold{fill:var(--gold)} .f-gold-soft{fill:var(--gold-soft)}
.f-green{fill:var(--green)} .f-green-soft{fill:var(--green-soft)}
.f-red{fill:var(--red)} .f-red-soft{fill:var(--red-soft)}
.f-amber{fill:var(--amber)} .f-amber-soft{fill:var(--amber-soft)}
.f-ink{fill:var(--ink)} .f-muted{fill:var(--muted)} .f-faint{fill:var(--faint)} .f-line{fill:var(--line)} .f-surface{fill:var(--surface)} .f-page{fill:var(--page)} .f-none{fill:none}
.s-brand{stroke:var(--brand)} .s-gold{stroke:var(--gold)} .s-green{stroke:var(--green)} .s-red{stroke:var(--red)} .s-amber{stroke:var(--amber)}
.s-surface{stroke:var(--surface)} .s-brand-soft{stroke:var(--brand-soft-2)} .s-brand-mid{stroke:var(--brand-mid)} .f-brand-mid{fill:var(--brand-mid)} .s-brand-light{stroke:var(--brand-light)} .f-brand-light{fill:var(--brand-light)}
.s-ink{stroke:var(--ink)} .s-muted{stroke:var(--muted)} .s-line{stroke:var(--line-2)} .s-faint{stroke:var(--faint)}
.svg-t{font-family:var(--font);font-size:13px;fill:var(--ink-2)}
.svg-t.sm{font-size:11.5px;fill:var(--muted)}
.svg-t.lg{font-size:15px;font-weight:700;fill:var(--ink)}
.svg-t.b{font-weight:700}
.svg-t.mono{font-family:var(--mono)}
/* text colors on SVG text (after .svg-t.sm/.lg so they win) */
.svg-t.t-red{fill:var(--red)} .svg-t.t-surface{fill:var(--surface)} .svg-t.t-soft{fill:var(--brand-soft)}
.svg-dash{stroke-dasharray:5 5}
/* darker fills for shapes that carry white text (WCAG AA) */
.f-brand-ink{fill:var(--brand-ink)} .f-green-ink{fill:var(--green-ink)} .f-amber-ink{fill:var(--amber-ink)} .f-gold-ink{fill:var(--gold-ink)} .f-red-ink{fill:var(--red-ink)}
/* SVG text colours — .svg-t.* so they win over .svg-t.sm's muted fill */
.svg-t.t-green{fill:var(--green-ink)} .svg-t.t-amber{fill:var(--amber-ink)} .svg-t.t-brand{fill:var(--brand-ink)}
.svg-t.t-red{fill:var(--red-ink)} .svg-t.t-gold{fill:var(--gold-ink)} .svg-t.t-white{fill:#fff}
/* portrait (phone-shaped) figures: keep them card-sized on wide screens */
.figure svg.portrait{max-width:380px;margin:0 auto}
/* icon at the start of a step heading */
.step-ico{vertical-align:-3px;margin-right:6px;color:var(--brand)}
/* gentle "draw-in" for paths with class .draw once the figure is revealed */
.draw{stroke-dasharray:var(--len,1200);stroke-dashoffset:0}
.js-reveal .reveal:not(.is-in) .draw{stroke-dashoffset:var(--len,1200)}
.js-reveal .reveal .draw{transition:stroke-dashoffset 1.4s var(--ease) .15s}
/* soft pulse for a "live" dot in a diagram */
.svg-pulse{transform-box:fill-box;transform-origin:center;animation:qp-pulse 2.2s ease-out infinite}
@keyframes qp-pulse{0%{opacity:.55;transform:scale(1)}70%{opacity:0;transform:scale(2.4)}100%{opacity:0;transform:scale(2.4)}}

/* ---------- tables ---------- */
.table-wrap{margin:22px 0;overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-1)}
.table-wrap table{width:100%;border-collapse:collapse;font-size:14.5px}
.table-wrap th,.table-wrap td{padding:12px 16px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
.table-wrap tr:last-child > *{border-bottom:0}
.table-wrap thead th{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);background:var(--surface-2);white-space:nowrap}
.table-wrap tbody tr{transition:background .12s}
.table-wrap tbody tr:hover{background:var(--surface-2)}
.table-wrap .num{text-align:right;font-variant-numeric:tabular-nums}

/* comparison: Conventional vs QuantumPools */
.compare{min-width:560px}
.compare th:first-child,.compare td:first-child{width:34%;font-weight:600;color:var(--ink)}
.compare thead th.is-us{color:var(--brand-ink);background:var(--brand-soft)}
.compare td.is-us{background:color-mix(in srgb,var(--brand-soft) 45%,transparent)}
.compare .yes,.compare .no,.compare .part{position:relative;padding-left:44px}
.compare .yes::before,.compare .no::before,.compare .part::before{position:absolute;left:16px;top:12px;width:19px;height:19px;border-radius:50%;
  display:grid;place-items:center;font-size:11px;font-weight:800;line-height:1;color:#fff}
.compare .yes::before{content:"\2713";background:var(--green)}
.compare .no::before{content:"\2715";background:var(--red)}
.compare .part::before{content:"\2013";background:var(--amber)}

/* key-value spec table */
.spec{min-width:420px}
.spec th{width:38%;font-size:13.5px;font-weight:600;color:var(--muted);background:var(--surface-2);text-transform:none;letter-spacing:0;white-space:normal}
.spec td{color:var(--ink)}
.spec td code{white-space:nowrap}

/* ---------- stat tiles ---------- */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin:22px 0}
.stat{--c:var(--brand);position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:16px 18px;box-shadow:var(--shadow-1);overflow:hidden}
.stat::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--c);opacity:.85}
.stat-label{font-size:11.5px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--muted);margin:0 0 6px}
.stat-value{font-size:26px;line-height:1.15;font-weight:760;letter-spacing:-.02em;color:var(--ink);font-variant-numeric:tabular-nums}
.stat-note{font-size:12.5px;color:var(--muted);margin-top:4px;line-height:1.4}
.stat.good{--c:var(--green)} .stat.good .stat-value{color:var(--green)}
.stat.bad{--c:var(--red)} .stat.bad .stat-value{color:var(--red)}
.stat.warn{--c:var(--amber)}
.stat.gold{--c:var(--gold)}

/* ---------- calculator widget ---------- */
.calc{margin:26px 0;background:var(--surface);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow-2);overflow:hidden}
.calc-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:16px 22px;border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,var(--brand-soft) 0%,var(--surface) 100%)}
.calc-title{font-weight:720;font-size:16px;color:var(--ink);display:flex;align-items:center;gap:10px;margin:0}
.calc-title svg{width:20px;height:20px;color:var(--brand)}
.calc-body{padding:20px 22px 22px}
.calc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:18px 22px}
.field{display:flex;flex-direction:column;gap:6px;min-width:0}
.field-top{display:flex;align-items:baseline;justify-content:space-between;gap:8px}
.field label,.field .field-label{font-size:13px;font-weight:650;color:var(--ink-2)}
.field-value{font-size:14px;font-weight:700;color:var(--brand-ink);font-variant-numeric:tabular-nums;white-space:nowrap}
.field-hint{font-size:12px;color:var(--faint);line-height:1.4}
.field-ends{display:flex;justify-content:space-between;font-size:11.5px;color:var(--faint);font-variant-numeric:tabular-nums}
.field input[type=number],.field input[type=text],.field select{
  width:100%;font:inherit;font-size:15px;color:var(--ink);background:var(--surface);border:1px solid var(--line-2);border-radius:10px;padding:9px 12px;
  transition:border-color .15s,box-shadow .15s}
.field input[type=number]:focus,.field input[type=text]:focus,.field select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft-2)}
/* range slider — JS keeps --pct in sync */
input[type=range]{--pct:50%;-webkit-appearance:none;appearance:none;width:100%;height:22px;background:transparent;margin:0;cursor:pointer}
input[type=range]:focus{outline:none}
input[type=range]::-webkit-slider-runnable-track{height:6px;border-radius:999px;
  background:linear-gradient(90deg,var(--brand) 0 var(--pct),var(--line) var(--pct) 100%)}
input[type=range]::-moz-range-track{height:6px;border-radius:999px;background:var(--line)}
input[type=range]::-moz-range-progress{height:6px;border-radius:999px;background:var(--brand)}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:20px;height:20px;margin-top:-7px;border-radius:50%;
  background:#fff;border:2px solid var(--brand);box-shadow:0 2px 6px rgba(15,26,48,.2);transition:transform .15s,box-shadow .15s}
input[type=range]::-moz-range-thumb{width:16px;height:16px;border-radius:50%;background:#fff;border:2px solid var(--brand);box-shadow:0 2px 6px rgba(15,26,48,.2)}
input[type=range]:hover::-webkit-slider-thumb{transform:scale(1.1)}
input[type=range]:focus-visible::-webkit-slider-thumb{box-shadow:0 0 0 5px var(--brand-soft-2)}
input[type=range]:focus-visible::-moz-range-thumb{box-shadow:0 0 0 5px var(--brand-soft-2)}
.calc-out{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-top:22px;padding-top:20px;border-top:1px dashed var(--line-2)}
.calc-out .stat{box-shadow:none;background:var(--surface-2)}
.calc-out .stat-value{transition:color .2s}
.calc-note{margin:14px 0 0;font-size:12.5px;color:var(--faint);max-width:none}
/* segmented toggle (e.g. choose a preset) */
.seg{display:inline-flex;padding:3px;border-radius:10px;background:var(--page);border:1px solid var(--line);gap:2px;flex-wrap:wrap}
.seg button{font:inherit;font-size:13px;font-weight:600;color:var(--muted);background:transparent;border:0;border-radius:8px;padding:6px 12px;cursor:pointer;transition:all .15s}
.seg button:hover{color:var(--ink)}
.seg button[aria-pressed=true],.seg button.is-on{background:var(--surface);color:var(--brand-ink);box-shadow:var(--shadow-1)}

/* ---------- glossary ---------- */
.glossary{margin:22px 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:12px}
.glossary > div{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:14px 16px;transition:border-color .15s}
.glossary > div:hover{border-color:var(--brand-soft-2)}
.glossary dt{font-weight:720;color:var(--ink);font-size:15px;margin:0 0 4px;display:flex;align-items:center;gap:8px}
.glossary dt::before{content:"";width:7px;height:7px;border-radius:2px;background:var(--brand);flex:none}
.glossary dd{margin:0;color:var(--muted);font-size:14.5px;line-height:1.55}
.glossary dd + dd{margin-top:6px}

/* ---------- tabs ---------- */
.tabs{margin:26px 0}
.tab-list{display:inline-flex;flex-wrap:wrap;gap:2px;padding:3px;border-radius:12px;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-1);margin:0 0 12px}
.tab{font:inherit;font-size:14px;font-weight:620;color:var(--muted);background:transparent;border:0;border-radius:9px;padding:8px 14px;cursor:pointer;
  display:inline-flex;align-items:center;gap:7px;transition:background .15s,color .15s}
.tab:hover{color:var(--ink)}
.tab[aria-selected=true]{background:var(--brand);color:#fff}
.tab .dot{width:8px;height:8px;border-radius:50%;background:currentColor;opacity:.8}
.tab-panel{animation:qp-fade .35s var(--ease)}
.tab-panel[hidden]{display:none}
.tab-panel > .figure:first-child{margin-top:0}
@keyframes qp-fade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}

/* ---------- accordion / FAQ ---------- */
.faq{margin:22px 0;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);box-shadow:var(--shadow-1);overflow:hidden}
.acc{border-bottom:1px solid var(--line)}
.acc:last-child{border-bottom:0}
.acc > summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:16px 20px;
  font-weight:650;color:var(--ink);font-size:15.5px;transition:background .15s}
.acc > summary::-webkit-details-marker{display:none}
.acc > summary:hover{background:var(--surface-2)}
.acc > summary::after{content:"";flex:none;width:9px;height:9px;border-right:2px solid var(--faint);border-bottom:2px solid var(--faint);
  transform:rotate(45deg) translate(-2px,-2px);transition:transform .25s var(--ease),border-color .15s}
.acc[open] > summary::after{transform:rotate(-135deg) translate(-2px,-2px);border-color:var(--brand)}
.acc[open] > summary{color:var(--brand-ink)}
.acc-body{padding:0 20px 16px;color:var(--ink-2);font-size:15px}
.acc[open] .acc-body{animation:qp-fade .3s var(--ease)}
.acc-body p{margin:0 0 10px;max-width:none}
.acc-body > :last-child{margin-bottom:0}

/* ---------- copyable address chip ---------- */
.chip{display:inline-flex;align-items:center;gap:8px;max-width:100%;font-family:var(--mono);font-size:13px;color:var(--ink);
  background:var(--surface);border:1px solid var(--line-2);border-radius:999px;padding:5px 7px 5px 12px;cursor:pointer;vertical-align:middle;
  transition:border-color .15s,background .15s,box-shadow .15s}
.chip:hover{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.chip-text{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}
.chip-label{font-family:var(--font);font-size:11px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted)}
.chip-icon{flex:none;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;background:var(--brand-soft);color:var(--brand)}
.chip-icon svg{width:13px;height:13px}
.chip.is-copied{border-color:var(--green);box-shadow:0 0 0 3px var(--green-soft)}
.chip.is-copied .chip-icon{background:var(--green);color:#fff}
.copy-tip{position:fixed;z-index:80;pointer-events:none;background:var(--ink);color:#fff;font:600 12px/1 var(--font);padding:7px 10px;border-radius:7px;
  transform:translate(-50%,-6px);opacity:0;transition:opacity .15s,transform .15s}
.copy-tip.is-on{opacity:1;transform:translate(-50%,-12px)}

/* ---------- badges / pills ---------- */
.badge{--c:var(--muted);--c-soft:var(--page);display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;line-height:1;
  letter-spacing:.02em;color:var(--c);background:var(--c-soft);border:1px solid color-mix(in srgb,var(--c) 22%,transparent);border-radius:999px;padding:5px 10px;white-space:nowrap;vertical-align:middle}
.badge.brand{--c:var(--brand-ink);--c-soft:var(--brand-soft)}
.badge.green{--c:var(--green-ink);--c-soft:var(--green-soft)}
.badge.amber{--c:var(--amber-ink);--c-soft:var(--amber-soft)}
.badge.red{--c:var(--red);--c-soft:var(--red-soft)}
.badge.gold{--c:var(--gold-ink);--c-soft:var(--gold-soft)}
.badge.live::before{content:"";width:7px;height:7px;border-radius:50%;background:currentColor;box-shadow:0 0 0 0 currentColor;animation:qp-live 1.8s ease-out infinite}
@keyframes qp-live{0%{box-shadow:0 0 0 0 color-mix(in srgb,currentColor 55%,transparent)}100%{box-shadow:0 0 0 7px transparent}}

/* ---------- timeline (e.g. audit progress) ---------- */
.timeline{list-style:none;margin:22px 0;padding:0 0 0 4px;max-width:none!important}
.timeline > li{position:relative;margin:0;padding:0 0 22px 34px}
.timeline > li:last-child{padding-bottom:0}
.timeline > li::before{content:"";position:absolute;left:5px;top:6px;width:14px;height:14px;border-radius:50%;background:var(--surface);border:2px solid var(--line-2);z-index:1}
.timeline > li:not(:last-child)::after{content:"";position:absolute;left:11px;top:20px;bottom:-4px;width:2px;background:var(--line)}
.timeline > li.done::before{background:var(--green);border-color:var(--green)}
.timeline > li.done:not(:last-child)::after{background:var(--green-soft)}
.timeline > li.now::before{background:var(--brand);border-color:var(--brand);box-shadow:0 0 0 5px var(--brand-soft)}
.tl-title{display:block;font-weight:700;color:var(--ink);font-size:15.5px}
.tl-meta{display:block;font-size:12.5px;color:var(--muted);margin:1px 0 4px}
.timeline p{margin:0;font-size:14.5px}

/* ---------- worked example ---------- */
.example{margin:22px 0;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:18px 20px;box-shadow:var(--shadow-1)}
.example-title{display:flex;align-items:center;gap:8px;font-size:12px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--gold-ink);margin:0 0 10px}
.example p{max-width:none}
.example > :last-child{margin-bottom:0}
.formula{font-family:var(--mono);font-size:14px;background:var(--surface-2);border:1px solid var(--line);border-radius:10px;padding:12px 16px;margin:12px 0;overflow-x:auto;white-space:nowrap;color:var(--ink)}

/* ---------- cards (link cards, used on the docs home and for "read next") ---------- */
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:14px;margin:22px 0}
.card{position:relative;display:flex;flex-direction:column;gap:6px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:20px;
  color:var(--ink);box-shadow:var(--shadow-1);transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s}
a.card:hover{text-decoration:none;color:var(--ink);transform:translateY(-3px);box-shadow:var(--shadow-3);border-color:var(--brand-soft-2)}
.card-glyph{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:var(--brand-soft);color:var(--brand);margin-bottom:6px;transition:background .2s,color .2s}
.card-glyph svg{width:22px;height:22px}
a.card:hover .card-glyph{background:var(--brand);color:#fff}
.card-kicker{font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--faint)}
.card-title{font-size:17px;font-weight:720;letter-spacing:-.01em;color:var(--ink)}
.card-text{font-size:14.5px;color:var(--muted);line-height:1.55;margin:0}
.card-go{margin-top:auto;padding-top:8px;font-size:13.5px;font-weight:650;color:var(--brand);display:inline-flex;align-items:center;gap:6px}
.card-go::after{content:"\2192";transition:transform .2s var(--ease)}
a.card:hover .card-go::after{transform:translateX(4px)}
.card.gold .card-glyph{background:var(--gold-soft);color:var(--gold)}
.card.red .card-glyph{background:var(--red-soft);color:var(--red)}
.card.green .card-glyph{background:var(--green-soft);color:var(--green)}

/* "start here" path: ordered, connected */
.path{list-style:none;margin:22px 0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;counter-reset:path;max-width:none!important}
.path li{counter-increment:path;margin:0;position:relative}
.path a{display:flex;flex-direction:column;gap:4px;height:100%;padding:18px 20px 18px;background:var(--surface);border:1px solid var(--line);color:var(--ink);transition:background .2s,border-color .2s}
.path li:first-child a{border-radius:var(--r-lg) 0 0 var(--r-lg)}
.path li:last-child a{border-radius:0 var(--r-lg) var(--r-lg) 0}
.path li + li a{border-left:0}
.path a:hover{text-decoration:none;background:var(--brand-soft)}
.path a::before{content:"Step " counter(path);font-size:11px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--brand)}
.path-title{font-weight:720;font-size:16px}
.path-text{font-size:13.5px;color:var(--muted);line-height:1.5}
.path li:not(:last-child)::after{content:"";position:absolute;right:-11px;top:50%;z-index:2;width:20px;height:20px;margin-top:-10px;border-radius:50%;
  background:var(--brand);box-shadow:0 0 0 4px var(--page)}
.path li:not(:last-child)::before{content:"";position:absolute;right:-2px;top:50%;z-index:3;width:6px;height:6px;margin-top:-3px;
  border-top:2px solid #fff;border-right:2px solid #fff;transform:rotate(45deg)}

/* two-column split (text | figure) */
.split{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px;align-items:center;margin:22px 0}
.split > *{min-width:0}
.split.stretch{align-items:stretch}

/* ---------- pager ---------- */
.pager{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:56px 0 0;padding-top:28px;border-top:1px solid var(--line)}
.pager a{display:flex;flex-direction:column;gap:3px;padding:16px 18px;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--surface);color:var(--ink);
  transition:border-color .2s,transform .2s var(--ease),box-shadow .2s}
.pager a:hover{text-decoration:none;border-color:var(--brand);transform:translateY(-2px);box-shadow:var(--shadow-2)}
.pager-label{font-size:12px;font-weight:650;color:var(--muted)}
.pager-title{font-size:16px;font-weight:720;color:var(--brand-ink)}
.pager-prev .pager-label::before{content:"\2190  "}
.pager-next{text-align:right;grid-column:2}
.pager-next .pager-label::after{content:"  \2192"}

/* ---------- footer ---------- */
.foot{border-top:1px solid var(--line);background:var(--surface)}
.foot-inner{max-width:1400px;margin:0 auto;padding:22px 24px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 24px;font-size:13px;color:var(--muted)}
.foot-inner p{margin:0;max-width:80ch}
.foot-links{display:flex;flex-wrap:wrap;gap:16px}
.foot-links a{color:var(--muted);font-weight:550}
.foot-links a:hover{color:var(--brand)}

/* ---------- reveal on scroll (only when JS is running) ---------- */
.js-reveal .reveal{opacity:0;transform:translateY(14px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.js-reveal .reveal.is-in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (max-width:1200px){
  .shell{grid-template-columns:var(--side-w) minmax(0,1fr);gap:40px}
  .toc{display:none}
}
@media (max-width:900px){
  :root{--topbar-h:56px}
  .topbar-inner{padding:0 16px;gap:12px}
  .toplinks{display:none}
  .menu-btn{display:inline-flex}
  .shell{display:block;padding:0 16px}
  .sidebar{
    position:fixed;left:0;right:0;top:var(--topbar-h);z-index:45;max-height:calc(100vh - var(--topbar-h));
    background:var(--surface);border-bottom:1px solid var(--line);box-shadow:0 18px 40px -20px rgba(15,26,48,.35);
    padding:16px 16px 20px;
    transform:translateY(-8px);opacity:0;visibility:hidden;pointer-events:none;
    transition:transform .25s var(--ease),opacity .2s,visibility 0s linear .25s}
  .nav-open .sidebar{transform:none;opacity:1;visibility:visible;pointer-events:auto;transition:transform .25s var(--ease),opacity .2s}
  .nav-open{overflow:hidden}
  .side-mobile-only{display:block}
  .side-list.side-mobile-only{display:grid;grid-template-columns:1fr 1fr;gap:2px}
  .main{padding:28px 0 56px}
  .main > section{margin-bottom:44px}
  .hero{padding:24px 20px 22px;border-radius:16px}
  .lead{font-size:17px}
  .path{grid-template-columns:1fr;gap:10px}
  .path li a,.path li:first-child a,.path li:last-child a{border-radius:var(--r-lg);border-left:1px solid var(--line)}
  .path li:not(:last-child)::after,.path li:not(:last-child)::before{display:none}
  .split{grid-template-columns:1fr}
}
@media (max-width:560px){
  body{font-size:15.5px}
  .foot-inner{padding:18px 16px}
  .pager{grid-template-columns:1fr}
  .pager-next{grid-column:1}
  .steps > li{padding:16px 16px 16px 58px}
  .steps > li::before{left:14px;width:30px;height:30px}
  .steps > li:not(:last-child)::after{left:28px}
  .callout{padding:14px 14px;gap:10px}
  .calc-body,.calc-head{padding-left:16px;padding-right:16px}
  .figure-art{padding:16px 12px 10px}
  /* wide diagrams: scroll sideways at a readable scale instead of shrinking to ~0.44x */
  .figure.wide .figure-art{overflow-x:auto;-webkit-overflow-scrolling:touch}
  .figure.wide .figure-art svg{min-width:560px}
  .figure figcaption{padding:10px 14px 12px}
  .tldr{padding:16px 16px}
  .stat-value{font-size:22px}
  .wordmark .wm-docs{display:none}
  /* wide charts: scroll sideways instead of shrinking text to ~5px */
  .figure-art.scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
  .figure-art.scroll svg{min-width:600px}
  /* step chips become a vertical timeline, so no connector dangles at a line end */
  .flow{flex-direction:column;align-items:flex-start;gap:6px}
  .flow li{flex-direction:column;align-items:flex-start;gap:6px}
  .flow li:not(:last-child)::after{width:2px;height:12px;margin-left:18px}
}

/* ---------- motion safety ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;transition-delay:0s!important}
  .js-reveal .reveal{opacity:1;transform:none}
  .js-reveal .reveal:not(.is-in) .draw{stroke-dashoffset:0}
  .svg-pulse,.badge.live::before{animation:none}
}

/* ---------- print ---------- */
@media print{
  .topbar,.sidebar,.toc,.progress,.pager,.menu-btn{display:none!important}
  .shell{display:block}
  .main{max-width:none}
  .js-reveal .reveal{opacity:1;transform:none}
}