/* QVal — editorial / scientific, testbed-first.
   Base aesthetic from draft B (serif, warm paper, burgundy accent);
   tool sections (terminal, quickstart, extend) folded in from draft A. */
:root{
  --paper:#f7f3ea; --paper-2:#fffdf8; --tint:#efe9dc; --card:#fffdf8; --bench:#ece3cf;
  --ink:#211d17; --ink-2:#4a443b; --muted:#857c6e; --line:#ddd4c4; --line-2:#cabfa9;
  --accent:#8a2b34; --accent-2:#b14a44;
  --serif:Iowan Old Style,"Palatino Linotype",Palatino,Georgia,"Times New Roman",serif;
  --sans:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  /* terminal (dark card, tuned to the warm palette) */
  --term-bg:#262019; --term-bg-2:#2f2820; --term-fg:#eadfca; --term-line:#43392c;
  --term-prompt:#cf9b53; --term-cmd:#eadfca; --term-dim:#9d8f78; --term-num:#cf8a86; --term-ok:#8fae72;
  --maxw:940px; --prose:680px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
[id]{scroll-margin-top:80px} /* keep anchored targets clear of the sticky nav */
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--serif);
  font-size:18px;line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}
a{color:var(--accent);text-underline-offset:2px}
a:hover{color:var(--accent-2)}
code{font-family:var(--mono);font-size:.86em;background:var(--tint);padding:1px 6px;border-radius:4px}
sup{font-size:.62em}
.em{color:var(--accent);font-style:italic}
.muted{color:var(--muted)}
.small{font-size:.85rem}
.center{text-align:center}
.narrow{max-width:62ch;margin-left:auto;margin-right:auto}
.skip{position:absolute;left:-999px}
.skip:focus{left:12px;top:12px;background:var(--accent);color:#fff;padding:8px 14px;border-radius:8px;z-index:99}

/* nav */
.nav{position:sticky;top:0;z-index:40;background:rgba(247,243,234,.86);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;height:64px;gap:24px}
.brand{font-family:var(--serif);font-weight:700;font-size:1.5rem;letter-spacing:.01em;color:var(--ink);text-decoration:none}
.nav-links{display:flex;gap:24px;margin-left:auto;font-family:var(--sans);font-size:.9rem}
.nav-links a{color:var(--ink-2);text-decoration:none}
.nav-links a:hover{color:var(--accent)}
.nav-cta{display:flex;align-items:center;gap:10px}
.ghost{font-family:var(--sans);font-size:.85rem;font-weight:600;color:var(--ink-2);text-decoration:none;
  border:1px solid var(--line-2);border-radius:999px;padding:6px 14px;background:var(--paper-2)}
.ghost:hover{border-color:var(--accent);color:var(--accent)}
.burger{display:none;background:none;border:1px solid var(--line-2);border-radius:8px;font-size:1.2rem;
  padding:2px 10px;cursor:pointer;color:var(--ink)}

/* hero — lighter "masthead" tone, set apart from the tool zone below */
.hero{position:relative;overflow:hidden;padding:84px 0 72px;background:var(--paper-2);border-bottom:1px solid var(--line-2)}
/* slide-1 motif: scattered points settling onto a Q-alignment diagonal */
.hero-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:0;opacity:.8;pointer-events:none}
.hero > .wrap{position:relative;z-index:1}
.hero-inner{max-width:840px;margin:0 auto;text-align:center}
.kicker{font-family:var(--sans);text-transform:uppercase;letter-spacing:.16em;font-size:.74rem;
  color:var(--accent);margin:0 0 24px}
h1{font-family:var(--serif);font-weight:700;font-size:clamp(2.6rem,6vw,4.4rem);line-height:1.04;
  letter-spacing:-.01em;margin:0 0 26px}
.dek{font-size:1.22rem;color:var(--ink-2);max-width:54ch;margin:0 auto 32px}
.dek strong{color:var(--ink)}
.hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-bottom:26px}
.btn{font-family:var(--sans);font-size:.95rem;font-weight:600;border:1px solid var(--line-2);
  color:var(--ink);padding:11px 22px;border-radius:999px;text-decoration:none;transition:.15s;background:var(--paper-2)}
.btn:hover{border-color:var(--accent);color:var(--accent)}
.btn-fill{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn-fill:hover{background:var(--accent-2);color:#fff}
.byline{font-family:var(--sans);font-size:.9rem;color:var(--ink-2);line-height:1.6;margin:0}

/* hero terminal */
.terminal{max-width:720px;margin:44px auto 0;text-align:left;border-radius:12px;overflow:hidden;
  border:1px solid var(--term-line);background:var(--term-bg);box-shadow:0 18px 40px -24px rgba(33,29,23,.55)}
.term-bar{display:flex;align-items:center;gap:8px;padding:10px 14px;background:var(--term-bg-2);
  border-bottom:1px solid var(--term-line)}
.dot{width:11px;height:11px;border-radius:50%;display:inline-block}
.dot.r{background:#e5685f}.dot.y{background:#e3b341}.dot.g{background:#5fb45f}
.term-title{margin-left:8px;font-family:var(--mono);font-size:.76rem;color:var(--term-dim)}
.term-body{margin:0;padding:18px 18px 20px;font-family:var(--mono);font-size:.84rem;line-height:1.65;
  color:var(--term-fg);white-space:pre-wrap;word-break:break-word;min-height:230px}
.term-body code{background:none;padding:0;border-radius:0;font-size:inherit;color:inherit}
.c-prompt{color:var(--term-prompt)}.c-cmd{color:var(--term-cmd)}.c-dim{color:var(--term-dim)}
.c-num{color:var(--term-num);font-weight:600}.c-ok{color:var(--term-ok)}
.caret{display:inline-block;width:8px;height:1.05em;background:var(--term-prompt);vertical-align:-2px;
  animation:blink 1.1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}

/* stat band */
.stat-band{display:flex;flex-wrap:wrap;justify-content:flex-start;gap:14px;margin-top:40px}
.stat{flex:1;min-width:120px;text-align:center;border:1px solid var(--line);border-radius:12px;
  background:var(--paper-2);padding:18px 12px}
.stat b{display:block;font-family:var(--serif);font-weight:700;font-size:1.9rem;color:var(--ink);line-height:1}
.stat span{display:block;font-family:var(--sans);font-size:.74rem;text-transform:uppercase;letter-spacing:.08em;
  color:var(--muted);margin-top:8px}

/* prose */
.prose{padding:80px 0}
.col{max-width:var(--prose);margin:0 auto;padding:0 28px}
.prose h2,.band h2{font-family:var(--serif);font-weight:700;font-size:clamp(1.8rem,3.4vw,2.5rem);
  letter-spacing:-.01em;margin:0 0 22px}
.prose p{margin:0 0 20px;color:var(--ink-2)}
.prose p strong{color:var(--ink)}
.sec-sub{max-width:64ch;color:var(--ink-2)}
blockquote{font-family:var(--serif);font-style:italic;font-size:1.5rem;line-height:1.4;color:var(--ink);
  border-left:3px solid var(--accent);margin:36px 0 0;padding:6px 0 6px 26px}
.flow{list-style:none;counter-reset:f;padding:0;margin:0 0 26px}
.flow li{counter-increment:f;position:relative;padding:14px 0 14px 56px;border-bottom:1px solid var(--line);color:var(--ink-2)}
.flow li:last-child{border-bottom:0}
.flow li::before{content:counter(f);position:absolute;left:0;top:14px;width:34px;height:34px;
  border:1px solid var(--accent);color:var(--accent);border-radius:50%;display:grid;place-items:center;
  font-family:var(--sans);font-weight:700;font-size:.95rem}
.flow b{color:var(--ink)}
.aside{font-size:.96rem;color:var(--muted);border-top:1px solid var(--line);padding-top:18px}

/* bands */
.band{padding:84px 0;border-block:1px solid var(--line);background:var(--paper-2)}
.band-tint{background:var(--tint)}
/* two zones: the testbed (light) and the benchmark (deeper warm) */
.zone-tool{background:var(--paper)}
.zone-bench{background:var(--bench);border-block:1px solid var(--line-2)}
.zone .band,.zone .prose{background:transparent}
/* slide-2 motif: sprawling trajectory tree behind "The tool" + "The bottleneck" */
.tool-intro{position:relative}
.tool-intro > canvas{position:absolute;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}
.tool-intro > .half-opener,.tool-intro > .prose{position:relative;z-index:1}
.half-opener{padding:78px 0 0}
.half-opener + section{padding-top:42px;border-top:0}
.half-kicker{font-family:var(--sans);text-transform:uppercase;letter-spacing:.2em;font-size:.82rem;
  font-weight:700;color:var(--accent);margin:0 0 18px;display:inline-flex;align-items:center;gap:12px}
.half-kicker::before{content:"";width:30px;height:2px;background:var(--accent);border-radius:2px}
.half-title{font-family:var(--serif);font-weight:700;font-size:clamp(2.1rem,4.2vw,3rem);line-height:1.05;
  letter-spacing:-.01em;margin:0 0 16px}
.half-lead{font-family:var(--serif);font-size:1.18rem;line-height:1.5;color:var(--ink-2);margin:0}
/* one content width shared by every section — text and structural elements
   line up on the same left and right edges */
.measure{max-width:none}
.idea-head{margin:0 0 40px}
.lead{font-size:1.12rem;color:var(--ink-2);margin:0 0 18px}
/* display equation — LaTeX-style math typography (serif, italic variables) */
.eq{background:var(--card);border:1px solid var(--line-2);border-radius:10px;
  padding:26px 22px;margin:26px 0;text-align:center;font-family:var(--serif)}
.eq-body{font-size:1.7rem;line-height:1.2;color:var(--ink)}
.eq i{font-style:italic}
.eq sup{font-size:.6em;font-style:italic;vertical-align:.55em}
.eq-op{font-style:normal;margin:0 .4em;color:var(--ink-2)}
.eq-where{display:block;margin-top:14px;font-size:1.02rem;color:var(--muted)}
.figure-hero{margin:30px 0 0}
.figure-hero img{width:100%;height:auto;display:block;background:#fff;border:1px solid var(--line-2);
  border-radius:12px;padding:16px}
.figure-hero figcaption,.env figcaption{font-family:var(--sans);font-size:.9rem;
  color:var(--muted);text-align:center;margin-top:12px}

/* code blocks (quickstart + extend) */
.code-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:34px}
.codeblock{border:1px solid var(--line-2);border-radius:10px;overflow:hidden;background:var(--card);min-width:0}
.code-head{display:flex;justify-content:space-between;align-items:center;padding:9px 14px;
  border-bottom:1px solid var(--line);font-family:var(--sans);font-size:.78rem;color:var(--muted);background:var(--paper)}
.codeblock pre{margin:0;padding:14px 16px;overflow-x:auto}
.codeblock code{background:none;padding:0;font-family:var(--mono);font-size:.82rem;color:var(--ink);
  white-space:pre;line-height:1.6}
.copy{font-family:var(--sans);font-size:.74rem;border:1px solid var(--line-2);background:var(--paper-2);
  color:var(--ink-2);border-radius:6px;padding:4px 10px;cursor:pointer}
.copy:hover,.copy.done{border-color:var(--accent);color:var(--accent)}
.center-note{text-align:center;max-width:72ch;margin:26px auto 0}

/* syntax highlighting (light, warm editorial palette) */
.tok-comment{color:#a3987f;font-style:italic}
.tok-keyword{color:#8a2b34;font-weight:600}
.tok-cmd{color:#8a2b34;font-weight:600}
.tok-string{color:#5d7a3b}
.tok-builtin{color:#1f6f8b}
.tok-flag{color:#1f6f8b}
.tok-type{color:#9a5b1e}
.tok-number{color:#9a5b1e}
.tok-key{color:#3a5a8a;font-weight:600}
.tok-bool{color:#9a5b1e}

/* extend cards */
.ext-grid{display:grid;grid-template-columns:1fr;gap:24px;margin-top:34px}
.ext-card{border:1px solid var(--line);border-radius:14px;background:var(--card);padding:24px;
  display:flex;flex-direction:column;min-width:0}
.ext-card h3{font-family:var(--serif);font-size:1.35rem;margin:0 0 10px;color:var(--ink)}
.ext-card h3 .accent{color:var(--accent)}
.ext-card p{color:var(--ink-2);margin:0 0 16px;font-size:1rem}
.ext-card .codeblock{margin-top:auto}

/* findings */
/* scoped under .prose to outrank `.prose p` (which sets margin/color) */
.prose .find-group{font-family:var(--sans);text-transform:uppercase;letter-spacing:.16em;font-size:.86rem;
  font-weight:700;color:var(--accent);margin:46px 0 24px;display:flex;align-items:center;gap:16px}
.prose .find-group::before{content:"";width:20px;height:3px;background:var(--accent);border-radius:2px;flex:none}
.prose .find-group::after{content:"";flex:1;height:1px;background:var(--line-2)}
.prose .find-group:first-of-type{margin-top:21px}
.finding{border-top:1px solid var(--line);padding:20px 0}
.finding h3{font-family:var(--serif);font-size:1.28rem;margin:0 0 8px;color:var(--ink)}
.finding p{margin:0;color:var(--ink-2);font-size:1.02rem}

/* environments */
.env-row{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:36px}
.env{margin:0}
.env img{width:100%;height:160px;object-fit:cover;border-radius:10px;border:1px solid var(--line-2);background:#fff}
.env figcaption{margin-top:10px}
.env figcaption b{display:block;color:var(--ink);font-family:var(--serif);font-size:1.02rem}
.env figcaption span{display:block;font-family:var(--sans);font-size:.8rem;color:var(--muted);margin-top:2px}

/* authors / bibtex */
.authors-line{color:var(--ink)}
.bibwrap{border:1px solid var(--line-2);border-radius:10px;overflow:hidden;margin-top:18px;background:var(--card)}
.bib-head{display:flex;justify-content:space-between;align-items:center;padding:10px 14px;
  border-bottom:1px solid var(--line);font-family:var(--sans);font-size:.82rem;color:var(--muted)}
.bibwrap pre{margin:0;padding:16px;overflow-x:auto}
.bibwrap code{background:none;padding:0;font-size:.82rem;color:var(--ink);white-space:pre;line-height:1.6}
.cite-links{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}

/* footer */
.foot{padding:34px 0;border-top:1px solid var(--line);font-family:var(--sans);font-size:.88rem;color:var(--muted);text-align:center}

/* ============ leaderboard (light) ============ */
.lb{font-family:var(--sans);margin:30px 0 0}
.lb-loading,.lb-error{color:var(--muted);padding:18px;border:1px dashed var(--line-2);border-radius:10px}
.lb-controls{display:flex;flex-wrap:wrap;gap:16px;align-items:flex-end;margin-bottom:14px;justify-content:flex-start}
.lb-control{display:flex;flex-direction:column;gap:6px}
.lb-control--grow{flex:1;min-width:150px;max-width:220px}
.lb-label{font-size:.7rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted)}
.lb-seg{display:inline-flex;border:1px solid var(--line-2);border-radius:999px;overflow:hidden;background:var(--card)}
.lb-seg-btn{background:none;border:0;color:var(--ink-2);padding:8px 15px;font-size:.85rem;cursor:pointer;font-family:var(--sans)}
.lb-seg-btn.is-active{background:var(--accent);color:#fff;font-weight:600}
.lb-backbone,.lb-search{font-family:var(--sans);background:var(--card);border:1px solid var(--line-2);
  color:var(--ink);border-radius:999px;padding:8px 14px;font-size:.88rem}
.lb-search{width:100%}
.lb-backbone:focus,.lb-search:focus{outline:none;border-color:var(--accent)}
.lb-families{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px;justify-content:flex-start}
.lb-chip{display:inline-flex;align-items:center;gap:7px;background:var(--card);border:1px solid var(--line-2);
  color:var(--ink-2);border-radius:999px;padding:5px 13px;font-size:.8rem;cursor:pointer}
.lb-chip::before{content:"";width:9px;height:9px;border-radius:50%;background:var(--fam)}
.lb-chip.is-on{color:var(--ink);border-color:var(--fam);background:color-mix(in srgb,var(--fam) 14%,var(--card))}
.lb-chip.is-dim{opacity:.45}
.lb-tablewrap{overflow-x:auto;border:1px solid var(--line-2);border-radius:12px;background:var(--card)}
.lb-table{width:100%;border-collapse:collapse;min-width:660px}
.lb-th{text-align:right;padding:13px 14px;font-size:.78rem;color:var(--muted);font-weight:600;
  border-bottom:1px solid var(--line);cursor:pointer;white-space:nowrap;user-select:none}
.lb-th-method{text-align:left}
.lb-th.is-sorted,.lb-th-avg{color:var(--accent)}
.lb-arrow{display:inline-block;width:12px}
.lb-table tbody tr{border-bottom:1px solid var(--line)}
.lb-table tbody tr:last-child{border-bottom:0}
.lb-table tbody tr:hover{background:var(--tint)}
.lb-method{display:flex;align-items:center;gap:9px;padding:11px 14px;font-size:.9rem;white-space:nowrap}
.lb-rank{color:var(--muted);font-size:.78rem;width:18px;text-align:right}
.lb-dot{width:10px;height:10px;border-radius:50%;background:var(--fam);flex:none}
.lb-mname{color:var(--ink);font-weight:600}
.lb-fam{color:var(--muted);font-size:.74rem}
.lb-badge{color:var(--accent);font-size:.6rem;margin-left:2px;cursor:help}
.lb-cell{padding:9px 14px;text-align:right;white-space:nowrap}
.lb-bar{position:relative;display:block;height:7px;border-radius:4px;background:var(--tint);margin-bottom:5px}
.lb-bar-fill{position:absolute;top:0;height:100%;border-radius:4px}
.lb-val{font-family:var(--mono);font-size:.82rem;color:var(--ink-2)}
.lb-cell--na .lb-na{color:var(--line-2)}
.lb-avg-cell{padding:9px 16px;text-align:right;font-family:var(--mono);font-weight:700;color:var(--ink)}
.lb-empty{padding:30px;text-align:center;color:var(--muted)}
.lb-note{color:var(--muted);font-size:.82rem;margin-top:14px;line-height:1.55;text-align:left;margin-inline:0}
.lb-neg-key{color:#8a8170}
.lb-sl-key{color:var(--accent);font-family:var(--mono)}

/* responsive */
@media(max-width:860px){
  body{font-size:17px}
  .nav-links{display:none}
  .nav-links.open{display:flex;position:absolute;top:64px;left:0;right:0;flex-direction:column;
    background:var(--paper-2);border-bottom:1px solid var(--line);padding:14px 28px;gap:14px}
  .burger{display:block}
  .code-grid,.ext-grid,.env-row{grid-template-columns:1fr}
  .env img{height:200px}
  .stat{min-width:30%}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}.caret{animation:none}}

/* ============ animated pipeline diagram (ported from the lab deck) ============ */
.figure-hero .pipe{background:var(--card);border:1px solid var(--line-2);border-radius:12px;
  padding:30px 26px;overflow:hidden}
.pipe .px{display:flex;align-items:center;justify-content:center;gap:16px}
.pipe .px-act{font-family:var(--sans);font-weight:700;text-transform:uppercase;letter-spacing:.1em;
  font-size:.68rem;color:var(--accent);margin:0 0 12px}

/* left act — the vertical journey of one sampled point */
.pipe .px-make{flex:0 0 290px}
.pipe .pb{list-style:none;display:block;margin:0;padding:0;position:relative}
.pipe .pb::before{content:"";position:absolute;left:14px;top:16px;bottom:16px;width:2px;
  background:linear-gradient(180deg,transparent,var(--line-2) 14%,var(--line-2) 86%,transparent);transform-origin:top}
.pipe .pb-step{display:grid;grid-template-columns:30px 1fr;gap:18px;align-items:center;padding:10px 0;position:relative}
.pipe .pb-rail{display:flex;justify-content:center}
.pipe .pb-dot{width:15px;height:15px;border-radius:50%;background:var(--accent);border:2px solid var(--accent);
  box-shadow:0 0 0 4px var(--card);z-index:1}
.pipe .pb-body{display:flex;flex-direction:column;align-items:flex-start;gap:7px}
.pipe .pb-text{flex:0 0 auto}
.pipe .pb-name{font-family:var(--sans);font-size:1.02rem;font-weight:700;color:var(--ink);margin:0}
.pipe .pb-desc{font-family:var(--sans);font-size:.88rem;line-height:1.42;color:var(--muted);margin:2px 0 0}
.pipe .pb-desc i{font-style:italic;color:var(--ink)}
.pipe .pb-art{display:flex;align-items:center;gap:10px}
.pipe .pb-states{display:inline-flex;gap:5px}
.pipe .pb-states i{width:13px;height:13px;border-radius:3px;background:var(--line-2)}
.pipe .pb-states i.on{background:var(--accent);box-shadow:0 0 0 3px rgba(138,43,52,.15)}
.pipe .pb-fan{height:46px;width:auto;overflow:visible}
.pipe .pb-fan-best{fill:var(--accent)}
.pipe .pb-bars{display:inline-flex;flex-direction:column;gap:5px;width:104px}
.pipe .pb-bars i{height:8px;border-radius:4px;background:var(--c);width:var(--w);transform-origin:left}
.pipe .pb-arrow{font-family:var(--sans);color:var(--muted);font-size:1.1rem}
.pipe .pb-pill{font-family:var(--mono);font-size:.9rem;font-weight:600;color:var(--ink);background:var(--paper-2);
  border:1px solid var(--line-2);border-radius:999px;padding:6px 14px;white-space:nowrap}
.pipe .pb-pill--ref{color:var(--accent);border-color:var(--accent);background:rgba(138,43,52,.06)}
.pipe .pb-token{position:absolute;left:8px;top:16px;width:15px;height:15px;border-radius:50%;
  background:var(--accent);opacity:0;z-index:2}

/* handoff */
.pipe .px-join{flex:0 0 auto;display:flex;flex-direction:column;align-items:center;gap:7px}
.pipe .px-join-label{font-family:var(--sans);font-size:.7rem;line-height:1.25;text-align:center;
  color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
.pipe .px-join-arrow{font-size:1.4rem;color:var(--accent);line-height:1}

/* right act — confluence: two orderings → ρ */
.pipe .px-align{flex:1 1 auto;min-width:0;max-width:440px}
.pipe .pc-diagram{min-width:0}
.pipe .pc-diagram svg{display:block;width:100%;height:auto;overflow:visible}
.pipe .pc-hd{font-family:var(--sans);font-weight:600;font-size:13px;fill:var(--muted);text-anchor:middle}
.pipe .pc-hd--ref{fill:var(--accent)}
.pipe .pc-col--ref .pc-item rect{fill:rgba(138,43,52,.07);stroke:var(--accent);stroke-width:1.2}
.pipe .pc-col--method .pc-item rect{fill:var(--paper-2);stroke:var(--line-2);stroke-width:1.2}
.pipe .pc-item text{font-family:var(--mono);font-weight:700;font-size:15px;fill:var(--ink);text-anchor:middle}
.pipe .pc-link{stroke-width:2}
.pipe .pc-link--ok{stroke:rgba(133,124,110,.55)}
.pipe .pc-link--x{stroke:var(--accent)}
.pipe .pc-converge path{stroke:var(--line-2);stroke-width:1.4}
.pipe .pc-merge{flex:0 0 auto;display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center}
.pipe .pc-rho{font-family:var(--mono);font-weight:700;font-size:2.5rem;line-height:1;color:var(--accent)}
.pipe .pc-merge-l{font-family:var(--sans);font-size:.82rem;line-height:1.3;color:var(--muted)}

/* dashed strokes draw in from a long offset (no per-path pathLength needed) */
.pipe .pb-fan path,.pipe .pc-link,.pipe .pc-converge path{stroke-dasharray:400;stroke-dashoffset:0}

/* resting (pre-reveal) state — mirrors each animation's from-state so nothing flashes before reveal */
.pipe .pb-dot,.pipe .pb-body,.pipe .pb-fan-best,.pipe .px-join,.pipe .px-align,
.pipe .pc-item,.pipe .pc-merge,.pipe .pc-rho{opacity:0}
.pipe .pb-bars i{opacity:.3;transform:scaleX(0)}
.pipe .pb::before{transform:scaleY(0)}
.pipe .pb-fan path,.pipe .pb-fan-max,.pipe .pc-link,.pipe .pc-converge path{stroke-dashoffset:400}

/* revealed on scroll — left act first, then the handoff, then the confluence */
.pipe.is-revealed .pb::before{animation:praildown 1.5s cubic-bezier(.3,.1,.3,1) both}
.pipe.is-revealed .pb-dot{animation:pdotin .45s both}
.pipe.is-revealed .pb-step:nth-child(2) .pb-dot{animation-delay:.12s}
.pipe.is-revealed .pb-step:nth-child(3) .pb-dot{animation-delay:.5s}
.pipe.is-revealed .pb-step:nth-child(4) .pb-dot{animation-delay:.85s}
.pipe.is-revealed .pb-body{animation:pfadein .5s both}
.pipe.is-revealed .pb-step:nth-child(2) .pb-body{animation-delay:.12s}
.pipe.is-revealed .pb-step:nth-child(3) .pb-body{animation-delay:.5s}
.pipe.is-revealed .pb-step:nth-child(4) .pb-body{animation-delay:.85s}
.pipe.is-revealed .pb-fan path{animation:pdraw .5s .6s ease both}
.pipe.is-revealed .pb-fan-max{animation:pdraw .5s .85s ease both}
.pipe.is-revealed .pb-fan-best{animation:ppop .4s 1.1s both;transform-box:fill-box;transform-origin:center}
.pipe.is-revealed .pb-bars i{animation:pgrow .5s .95s cubic-bezier(.2,.7,.2,1) both}
.pipe.is-revealed .pb-token{animation:ptoken 1.7s cubic-bezier(.4,.05,.35,1) both}
.pipe.is-revealed .px-join{animation:pfadein .5s 1.3s both}
.pipe.is-revealed .px-align{animation:pfadein .5s 1.45s both}
.pipe.is-revealed .pc-col--ref .pc-item{animation:pcin-l .5s 1.6s both}
.pipe.is-revealed .pc-col--method .pc-item{animation:pcin-r .5s 1.6s both}
.pipe.is-revealed .pc-item:nth-child(2){animation-delay:1.68s}
.pipe.is-revealed .pc-item:nth-child(3){animation-delay:1.76s}
.pipe.is-revealed .pc-item:nth-child(4){animation-delay:1.84s}
.pipe.is-revealed .pc-link{animation:pdraw .6s 2s ease both}
.pipe.is-revealed .pc-converge path{animation:pdraw .6s 2.35s ease both}
.pipe.is-revealed .pc-merge{animation:pfadein .5s 2.45s both}
.pipe.is-revealed .pc-rho{animation:ppop .55s 2.6s both}

@keyframes pdraw{from{stroke-dashoffset:400}to{stroke-dashoffset:0}}
@keyframes ppop{0%{opacity:0;transform:scale(.3)}60%{opacity:1;transform:scale(1.12)}100%{opacity:1;transform:scale(1)}}
@keyframes pgrow{from{opacity:.3;transform:scaleX(0)}to{opacity:1;transform:scaleX(1)}}
@keyframes pfadein{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
@keyframes praildown{from{transform:scaleY(0)}to{transform:scaleY(1)}}
@keyframes pdotin{from{opacity:0;transform:scale(.2)}to{opacity:1;transform:scale(1)}}
@keyframes ptoken{0%{top:16px;opacity:0}8%{opacity:1}90%{opacity:1}100%{top:calc(100% - 16px);opacity:0}}
@keyframes pcin-l{from{opacity:0;transform:translateX(-12px)}to{opacity:1;transform:none}}
@keyframes pcin-r{from{opacity:0;transform:translateX(12px)}to{opacity:1;transform:none}}

/* narrow screens: stack the two acts, point the handoff arrow down */
@media(max-width:720px){
  .pipe .px{flex-direction:column;gap:22px}
  .pipe .px-make{flex:0 0 auto;width:100%;max-width:340px}
  .pipe .px-join-arrow{transform:rotate(90deg)}
  .pipe .px-align{max-width:100%;width:100%}
}

/* reduced motion: show the final composition, no animation */
@media(prefers-reduced-motion:reduce){
  .pipe *,.pipe *::before,.pipe *::after{animation:none!important}
  .pipe .pb-dot,.pipe .pb-body,.pipe .pb-fan-best,.pipe .px-join,.pipe .px-align,
  .pipe .pc-item,.pipe .pc-merge,.pipe .pc-rho,.pipe .pb-bars i{opacity:1!important;transform:none!important}
  .pipe .pb::before{transform:scaleY(1)!important}
  .pipe .pb-fan path,.pipe .pb-fan-max,.pipe .pc-link,.pipe .pc-converge path{stroke-dashoffset:0!important}
  .pipe .pb-token{opacity:0!important}
}