@font-face{font-family:'Newsreader';font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/newsreader-latin-400-normal.woff2) format('woff2')}
@font-face{font-family:'Newsreader';font-style:italic;font-weight:400;font-display:swap;src:url(/assets/fonts/newsreader-latin-400-italic.woff2) format('woff2')}
@font-face{font-family:'Newsreader';font-style:normal;font-weight:500;font-display:swap;src:url(/assets/fonts/newsreader-latin-500-normal.woff2) format('woff2')}
@font-face{font-family:'Newsreader';font-style:italic;font-weight:500;font-display:swap;src:url(/assets/fonts/newsreader-latin-500-italic.woff2) format('woff2')}
@font-face{font-family:'Newsreader';font-style:normal;font-weight:600;font-display:swap;src:url(/assets/fonts/newsreader-latin-600-normal.woff2) format('woff2')}
@font-face{font-family:'Public Sans';font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/public-sans-latin-400-normal.woff2) format('woff2')}
@font-face{font-family:'Public Sans';font-style:italic;font-weight:400;font-display:swap;src:url(/assets/fonts/public-sans-latin-400-italic.woff2) format('woff2')}
@font-face{font-family:'Public Sans';font-style:normal;font-weight:600;font-display:swap;src:url(/assets/fonts/public-sans-latin-600-normal.woff2) format('woff2')}
@font-face{font-family:'Public Sans';font-style:italic;font-weight:600;font-display:swap;src:url(/assets/fonts/public-sans-latin-600-italic.woff2) format('woff2')}
@font-face{font-family:'Public Sans';font-style:normal;font-weight:700;font-display:swap;src:url(/assets/fonts/public-sans-latin-700-normal.woff2) format('woff2')}
@font-face{font-family:'Public Sans';font-style:italic;font-weight:700;font-display:swap;src:url(/assets/fonts/public-sans-latin-700-italic.woff2) format('woff2')}
@font-face{font-family:'Public Sans';font-style:normal;font-weight:800;font-display:swap;src:url(/assets/fonts/public-sans-latin-800-normal.woff2) format('woff2')}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:400;font-display:swap;src:url(/assets/fonts/ibm-plex-mono-latin-400-normal.woff2) format('woff2')}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:500;font-display:swap;src:url(/assets/fonts/ibm-plex-mono-latin-500-normal.woff2) format('woff2')}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:600;font-display:swap;src:url(/assets/fonts/ibm-plex-mono-latin-600-normal.woff2) format('woff2')}
@font-face{font-family:'IBM Plex Mono';font-style:normal;font-weight:700;font-display:swap;src:url(/assets/fonts/ibm-plex-mono-latin-700-normal.woff2) format('woff2')}

:root{
  --ink:#0E1B2C; --paper:#F6F8FA; --paper-deep:#EDF1F5; --line:#D6DEE6;
  --part1:#2563EB; --part2:#0E9F6E; --part3:#D97D0D;
  --part1-soft:#E4EDFD; --part2-soft:#E0F5EC; --part3-soft:#FBEEDB;
  --muted:#5B6B7C; --body:#2A3B4E; --radius:14px; --acc:var(--part1); --acc-soft:var(--part1-soft);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Public Sans',sans-serif;background:var(--paper);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased}
.mono{font-family:'IBM Plex Mono',monospace}
.wrap{max-width:1160px;margin:0 auto;padding:0 28px}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--part1);outline-offset:2px}

/* NAV */
nav{position:sticky;top:0;z-index:50;background:rgba(246,248,250,.88);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;gap:0;height:60px}
.wordmark{display:flex;align-items:center;gap:10px;color:var(--ink);cursor:pointer;flex:0 0 auto;transition:opacity .15s}
.wordmark:hover{opacity:.72}
.mark{display:grid;grid-template-columns:repeat(3,9px);grid-template-rows:repeat(2,9px);gap:2px}
.mark span{border-radius:2.5px}
.mark span:nth-child(1){background:var(--part1)}.mark span:nth-child(2){background:var(--part2)}.mark span:nth-child(3){background:var(--part3)}
.mark span:nth-child(4){background:var(--ink)}.mark span:nth-child(5){background:var(--ink)}.mark span:nth-child(6){background:var(--ink)}
.wordmark b{font-family:'Newsreader',serif;font-weight:600;font-size:20px;letter-spacing:.2px;white-space:nowrap}
.wordmark b em{font-style:italic;font-weight:500}

.nav-links{display:flex;align-items:center;gap:4px;margin-left:56px;margin-right:auto}
.nl{display:inline-flex;align-items:center;gap:6px;padding:5px 9px;border-radius:7px;font-size:14px;font-weight:500;color:var(--muted);cursor:pointer;white-space:nowrap;transition:color .14s,background .14s;position:relative}
.nl:hover{color:var(--ink);background:rgba(14,27,44,.04)}
.nl i{width:7px;height:7px;border-radius:2px;display:inline-block;opacity:.5;transition:opacity .14s}
.nl:hover i{opacity:1}
.nl.active{color:var(--ink);font-weight:600;background:transparent}
.nl.active::after{content:"";position:absolute;left:9px;right:9px;bottom:-1px;height:2px;border-radius:2px;background:var(--ink)}
.nl.active i{opacity:1}
.navburger{display:none;margin-left:auto;background:transparent;border:1px solid var(--line);border-radius:9px;width:38px;height:34px;cursor:pointer;padding:0;flex-direction:column;justify-content:center;align-items:center;gap:4px}
.navburger span{display:block;width:16px;height:1.8px;background:var(--ink);border-radius:2px;transition:transform .2s,opacity .2s}
.navburger[aria-expanded="true"] span:nth-child(1){transform:translateY(5.8px) rotate(45deg)}
.navburger[aria-expanded="true"] span:nth-child(2){opacity:0}
.navburger[aria-expanded="true"] span:nth-child(3){transform:translateY(-5.8px) rotate(-45deg)}
.nav-progress{height:2px;background:transparent;margin-top:-1px}
.nav-progress span{display:block;height:2px;width:0;background:var(--acc);transition:width .1s linear}

.rulebookbtn{cursor:pointer;border:1px solid var(--line);background:#fff;border-radius:12px;padding:14px 20px;font-size:14.5px;font-weight:600;white-space:nowrap;color:var(--ink);transition:border-color .15s,transform .15s;display:inline-block}
.rulebookbtn:hover{border-color:var(--ink);transform:translateY(-1px)}


/* ===== SITE SEARCH ===== */
.askwrap{position:relative;max-width:520px;z-index:30}
.results{position:absolute;top:calc(100% + 8px);left:0;right:0;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 18px 44px rgba(14,27,44,.14);max-height:min(60vh,420px);overflow-y:auto;display:none;padding:6px}
.results.on{display:block}
.rhead{font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);padding:9px 12px 5px}
.ritem{display:flex;gap:10px;align-items:baseline;padding:9px 12px;border-radius:9px;cursor:pointer;transition:background .1s}
.ritem:hover,.ritem.sel{background:var(--paper-deep)}
.ritem .rn{font-family:'IBM Plex Mono',monospace;font-size:11px;font-weight:600;flex:0 0 auto;min-width:22px}
.ritem .rt{font-size:14px;font-weight:600;line-height:1.35;color:var(--ink)}
.ritem .rd{font-size:12.5px;color:var(--muted);line-height:1.45;margin-top:2px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.ritem .rmeta{font-family:'IBM Plex Mono',monospace;font-size:9px;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);margin-top:3px}
.ritem.soon{opacity:.55}
.rnone{padding:16px 14px;font-size:14px;color:var(--muted)}
.rnone b{color:var(--ink)}

/* VIEWS */
.view{display:none}.view.on{display:block}

/* HERO */
header{padding:78px 0 52px;position:relative;overflow:hidden}
.hero{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.eyebrow{font-family:'IBM Plex Mono',monospace;font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);display:flex;align-items:center;gap:10px}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--part3)}
h1{font-family:'Newsreader',serif;font-weight:500;font-size:clamp(42px,5.6vw,68px);line-height:1.04;letter-spacing:-.015em;margin:18px 0 20px}
h1 em{font-style:italic;color:var(--part1)}
.lede{font-size:18px;color:var(--muted);max-width:52ch;margin-bottom:30px}
.ask{display:flex;max-width:520px;border:1.5px solid var(--ink);border-radius:12px;background:#fff;overflow:hidden;box-shadow:0 6px 24px rgba(14,27,44,.08)}
.ask input{flex:1;border:0;padding:15px 18px;font:inherit;font-size:15.5px;color:var(--ink);background:transparent}
.ask input::placeholder{color:#9AA8B6}
.ask button{border:0;background:var(--ink);color:#fff;padding:0 22px;font:inherit;font-weight:600;font-size:14.5px;cursor:pointer}
.hero-facts{display:flex;gap:26px;margin-top:26px;font-size:13.5px;color:var(--muted);flex-wrap:wrap}
.hero-facts b{display:block;font-family:'IBM Plex Mono',monospace;font-size:17px;color:var(--ink);font-weight:500}
.build{position:relative;height:360px;display:flex;align-items:center;justify-content:center}
.set{display:grid;grid-template-columns:repeat(6,44px);grid-template-rows:repeat(6,44px);gap:5px}
.brick{border-radius:8px;opacity:0;transform:translateY(-26px);animation:drop .5s cubic-bezier(.2,.8,.3,1.2) forwards;position:relative}
.brick::after{content:"";position:absolute;inset:6px auto auto 6px;width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.35)}
.b1{background:var(--part1)}.b2{background:var(--part2)}.b3{background:var(--part3)}.bi{background:var(--ink)}
@keyframes drop{to{opacity:1;transform:translateY(0)}}
.set-caption{position:absolute;bottom:-6px;left:50%;transform:translateX(-50%);white-space:nowrap;font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--muted)}
@media (prefers-reduced-motion:reduce){.brick{animation:none;opacity:1;transform:none}}

/* BRICKLINE */
.brickline-sec{padding:34px 0 60px;border-top:1px solid var(--line)}
.bl-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:16px;gap:16px;flex-wrap:wrap}
.bl-head h2{font-family:'Newsreader',serif;font-weight:500;font-size:26px}
.bl-head span{font-size:13.5px;color:var(--muted)}
.brickline{display:flex;gap:3px;flex-wrap:wrap}
.brickline span{flex:1 0 8px;height:20px;min-width:8px;border-radius:4px;opacity:.92;transition:transform .12s,opacity .12s;position:relative}
.brickline span:hover{transform:translateY(-4px);opacity:1}
.brickline span.soon{opacity:.3;cursor:default}
.brickline span.soon:hover{transform:none}
.brickline span::after{content:attr(data-t);position:absolute;bottom:130%;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;font-size:11.5px;padding:5px 9px;border-radius:6px;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .12s;z-index:5}
.brickline span:hover::after{opacity:1}
.bl-legend{display:flex;gap:22px;margin-top:14px;font-size:13px;color:var(--muted);flex-wrap:wrap}
.dot{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:7px;vertical-align:-1px}

/* PARTS CARDS */
.parts{padding:26px 0 70px}
.parts-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.parts-grid .part{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px;position:relative;overflow:hidden;transition:transform .15s,box-shadow .15s}
.parts-grid .part:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(14,27,44,.09)}
.parts-grid .part .tag{font-family:'IBM Plex Mono',monospace;font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;padding:5px 11px;border-radius:99px;display:inline-block;margin-bottom:16px;font-weight:500}
.parts-grid .part h3{font-family:'Newsreader',serif;font-weight:500;font-size:24px;margin-bottom:8px}
.parts-grid .part p{font-size:14.5px;color:var(--muted);margin-bottom:16px}
.parts-grid .part ul{list-style:none;font-size:14px;display:grid;gap:8px;margin-bottom:20px}
.parts-grid .part li{padding-left:20px;position:relative;color:#33465C}
.parts-grid .part li::before{content:"";position:absolute;left:0;top:8px;width:9px;height:9px;border-radius:3px}
.parts-grid .p1 .tag{background:var(--part1-soft);color:var(--part1)} .parts-grid .p1 li::before{background:var(--part1)}
.parts-grid .p2 .tag{background:var(--part2-soft);color:var(--part2)} .parts-grid .p2 li::before{background:var(--part2)}
.parts-grid .p3 .tag{background:var(--part3-soft);color:var(--part3)} .parts-grid .p3 li::before{background:var(--part3)}
.parts-grid .part a.go{font-size:14px;font-weight:600;text-decoration:none;color:var(--ink)}
.parts-grid .part a.go::after{content:" →"}
.parts-grid .part .n{position:absolute;top:18px;right:22px;font-family:'Newsreader',serif;font-style:italic;font-size:15px;color:var(--muted)}

/* CHAPTER PAGES */
.chapter{max-width:840px;margin:0 auto;padding:52px 28px 40px}
.lvl1{--acc:var(--part1);--acc-soft:var(--part1-soft)}
.lvl2{--acc:var(--part2);--acc-soft:var(--part2-soft)}
.lvl3{--acc:var(--part3);--acc-soft:var(--part3-soft)}
.ch-meta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.badge{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.08em;padding:4px 10px;border-radius:99px;border:1px solid var(--line);color:var(--muted);background:#fff}
.badge.lvl{background:var(--acc-soft);color:var(--acc);border-color:transparent}
.ch-title{font-family:'Newsreader',serif;font-weight:500;font-size:clamp(34px,4.5vw,48px);line-height:1.08;letter-spacing:-.01em;margin-bottom:22px}
.shortanswer{border-left:3px solid var(--acc);background:var(--acc-soft);border-radius:0 12px 12px 0;padding:18px 20px;font-size:16px;line-height:1.65;margin:0 0 34px;color:var(--body)}
.shortanswer b{display:block;font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--acc);margin-bottom:7px}
.prose p{font-size:16.5px;line-height:1.75;color:var(--body);margin:0 0 18px}
.prose h2{font-family:'Newsreader',serif;font-weight:500;font-size:29px;margin:40px 0 14px;letter-spacing:-.01em}
.prose ul{margin:0 0 18px 2px;list-style:none;display:grid;gap:10px}
.prose ul li{font-size:16px;line-height:1.7;color:var(--body);padding-left:24px;position:relative}
.prose ul li::before{content:"";position:absolute;left:2px;top:10px;width:10px;height:10px;border-radius:3px;background:var(--acc)}
.prose ol{margin:0 0 18px 22px;display:grid;gap:10px}
.prose ol li{font-size:16px;line-height:1.7;color:var(--body)}
.prose strong{color:var(--ink)}
figure.viz{margin:32px 0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 22px 16px;overflow:hidden}
figure.viz figcaption{margin-top:12px;font-size:13.5px;color:var(--muted)}
figure.viz figcaption b{color:var(--ink);font-weight:600}
.src-line{display:block;margin-top:5px;font-family:'IBM Plex Mono',monospace;font-size:11px;color:#8B99A8}
.viz svg{width:100%;height:auto;display:block}
.viz .axis{font-family:'IBM Plex Mono',monospace;font-size:10px;fill:#8B99A8}
.viz .lbl{font-family:'Public Sans',sans-serif;font-size:10.5px;fill:var(--muted)}
.viz .lblb{font-family:'Public Sans',sans-serif;font-size:10.5px;font-weight:700;fill:var(--ink)}
.scen{display:flex;gap:6px;margin-bottom:12px}
.scen button{border:1px solid var(--line);background:#fff;border-radius:99px;padding:6px 14px;font:inherit;font-size:13px;font-weight:600;color:var(--muted);cursor:pointer}
.scen button.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.regbox{border:1px solid var(--line);border-radius:12px;overflow:hidden;margin:28px 0}
.regbox .rb-h{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.12em;text-transform:uppercase;background:var(--paper-deep);padding:10px 16px;color:var(--muted)}
.regbox .row{display:flex;gap:14px;padding:14px 16px;border-top:1px solid var(--line);font-size:15px;line-height:1.65;color:var(--body)}
.regbox .row b{flex:0 0 auto;font-size:18px}
.takeaways{background:var(--acc-soft);border-radius:var(--radius);padding:24px 26px;margin:36px 0}
.takeaways h2{font-family:'Newsreader',serif;font-weight:500;font-size:24px;margin-bottom:14px}
.takeaways ul{list-style:none;display:grid;gap:10px}
.takeaways li{font-size:15.5px;line-height:1.65;color:var(--body);padding-left:24px;position:relative}
.takeaways li::before{content:"";position:absolute;left:2px;top:9px;width:10px;height:10px;border-radius:3px;background:var(--acc)}
.faq{margin:36px 0}
.faq h2{font-family:'Newsreader',serif;font-weight:500;font-size:24px;margin-bottom:8px}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{cursor:pointer;padding:14px 4px;font-size:15.5px;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::after{content:"+";color:var(--acc);font-weight:700;font-size:18px}
.faq details[open] summary::after{content:"–"}
.faq details p{padding:0 4px 16px;font-size:15px;color:var(--body);line-height:1.7}
.sources{margin:36px 0 8px;font-size:13.5px;color:var(--muted)}
.sources h3{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.12em;text-transform:uppercase;margin-bottom:10px;color:var(--muted)}
.sources ul{list-style:none;display:grid;gap:6px}
.sources li{padding-left:16px;position:relative}
.sources li::before{content:"·";position:absolute;left:2px;color:var(--acc)}
.chnav{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:44px 0 0}
.chnav>span,.chnav a{display:block;border:1.5px solid var(--line);background:#fff;border-radius:12px;padding:16px 18px;text-decoration:none;color:var(--ink);cursor:pointer;transition:border-color .15s, transform .15s, box-shadow .15s, background .15s}
.chnav>span:hover,.chnav a:hover{border-color:var(--acc);background:var(--paper-deep);transform:translateY(-2px);box-shadow:0 4px 14px rgba(26,39,51,.08)}.chnav>span:hover .dir,.chnav a:hover .dir{color:var(--acc)}.chnav>span:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
.chnav .dir{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);display:block;margin-bottom:5px}
.chnav .t{font-family:'Newsreader',serif;font-size:17px;font-weight:500}
.chnav .next{text-align:right}
.chnav .ghost{opacity:.5;pointer-events:none;cursor:default}

/* diagram building blocks */
.mini-bricks{display:grid;gap:3px}
.duo{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.panelbox{border:1px solid var(--line);border-radius:12px;padding:16px;background:var(--paper)}
.panelbox h5{font-size:13px;font-weight:700;margin-bottom:10px;letter-spacing:.02em}
.pill{font-family:'IBM Plex Mono',monospace;font-size:11px;border-radius:99px;padding:3px 10px;display:inline-block}
.tick{animation:tickpulse 1.6s ease-in-out infinite}
@keyframes tickpulse{0%,100%{opacity:1}50%{opacity:.45}}
.drawline{stroke-dasharray:1200;stroke-dashoffset:1200;animation:draw 1.6s ease-out forwards}
@keyframes draw{to{stroke-dashoffset:0}}
@media (prefers-reduced-motion:reduce){.drawline{animation:none;stroke-dashoffset:0}.tick{animation:none}}


/* PART OVERVIEW PAGES */
.ovhead{padding:56px 0 6px}
.ovhead .ch-title{margin-bottom:10px}
.ovhead p.lede{margin-bottom:6px}

/* generated chapter additions */
.vizspec{border:1px solid var(--line);border-left:3px solid var(--part3);background:#fff;border-radius:0 12px 12px 0;padding:16px 18px;margin:26px 0}
.vizspec .vs-tag{font-family:'IBM Plex Mono',monospace;font-size:10px;letter-spacing:.12em;color:var(--part3);display:block;margin-bottom:8px}
.vizspec p{font-size:13.5px;color:var(--muted);line-height:1.6;margin:0}
.ptable{width:100%;border-collapse:collapse;margin:24px 0;font-size:14.5px}
.ptable th{font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);text-align:left;padding:8px 10px;border-bottom:2px solid var(--ink)}
.ptable td{padding:9px 10px;border-bottom:1px solid var(--line);color:var(--body)}
.ptable tr td:first-child{font-weight:600;color:var(--ink)}

/* ===== PART OVERVIEW v2 ===== */
.ovhead{padding:48px 0 0}
.ov-stats{display:flex;gap:26px;flex-wrap:wrap;margin:18px 0 4px;font-size:13.5px;color:var(--muted)}
.ov-stats b{font-family:'IBM Plex Mono',monospace;color:var(--ink);font-weight:500}
.ov-controls{position:sticky;top:66px;z-index:20;background:rgba(246,248,250,.93);backdrop-filter:blur(8px);padding:14px 0 12px;border-bottom:1px solid var(--line);margin-bottom:8px}
.ov-search{display:flex;align-items:center;gap:8px;border:1.5px solid var(--line);background:#fff;border-radius:10px;padding:9px 12px;max-width:420px}
.ov-search input{border:0;flex:1;font:inherit;font-size:14.5px;color:var(--ink);background:transparent}
.ov-search input:focus{outline:none}
.ov-search svg{flex:0 0 auto;opacity:.45}
.ov-filters{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}
.chip{border:1px solid var(--line);background:#fff;border-radius:99px;padding:5px 12px;font-size:12.5px;font-weight:600;color:var(--muted);cursor:pointer;transition:.12s;user-select:none}
.chip:hover{border-color:var(--acc);color:var(--ink)}
.chip.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.chip .cnt{font-family:'IBM Plex Mono',monospace;font-size:10.5px;opacity:.6;margin-left:5px}
.ov-empty{padding:40px 0;color:var(--muted);font-size:15px}
#grid-p1,#grid-p2,#grid-p3{padding-bottom:70px}
.trackgrp{margin:26px 0 0}
.trackgrp h3{display:flex;align-items:baseline;gap:10px;font-family:'Newsreader',serif;font-weight:500;font-size:20px;margin-bottom:3px}
.trackgrp h3 .tdot{width:11px;height:11px;border-radius:3px;flex:0 0 auto;transform:translateY(-1px)}
.trackgrp h3 .tn{font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--muted);font-weight:400}
.trackgrp .tdesc{font-size:13px;color:var(--muted);margin-bottom:10px;max-width:62ch}
.ov-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(268px,1fr));gap:8px}
.ov-view{display:inline-flex;border:1px solid var(--line);border-radius:8px;overflow:hidden;margin-right:14px;flex:none}
.ov-view .vbtn{padding:7px 13px;font-size:12.5px;font-weight:600;color:var(--muted);cursor:pointer;user-select:none;background:#fff}
.ov-view .vbtn.on{background:var(--ink);color:#fff}
.ov-view .vbtn:not(.on):hover{color:var(--ink)}
.ov-toc{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff}
.toc-row{display:flex;align-items:baseline;gap:14px;padding:13px 18px;border-bottom:1px solid var(--line);cursor:pointer}
.toc-row:last-child{border-bottom:none}
.toc-row:hover{background:var(--paper-deep)}
.toc-row:focus-visible{outline:2px solid var(--acc);outline-offset:-2px}
.toc-row .num{font-family:'IBM Plex Mono',monospace;font-size:12px;color:var(--muted);min-width:26px;text-align:right;flex:none}
.toc-row .tmain{flex:1;min-width:0}
.toc-row .tt{font-weight:600;color:var(--ink);font-size:14.5px}
.toc-row .dd{font-size:12.5px;color:var(--muted);line-height:1.45;margin-top:2px}
.toc-row .tmeta{flex:none;display:flex;align-items:center;gap:8px;font-size:11px;color:var(--muted)}
.toc-row .tdot{width:8px;height:8px;border-radius:50%;display:inline-block;flex:none}
.toc-row.soon{cursor:default;opacity:.55}
.toc-row.soon:hover{background:#fff}
@media(max-width:760px){
  .toc-row{padding:12px 13px;gap:10px;flex-wrap:wrap}
  .toc-row .tmeta{width:100%;padding-left:36px;margin-top:2px}
  .ov-view{margin-right:10px}
  .ov-view .vbtn{padding:8px 11px}
}

.ovc{background:#fff;border:1px solid var(--line);border-radius:10px;padding:10px 12px 9px;color:var(--ink);display:block;transition:transform .12s,border-color .12s,box-shadow .12s;cursor:pointer;position:relative;overflow:hidden}
.ovc::before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--acc);opacity:0;transition:opacity .12s}
.ovc:hover{transform:translateY(-1px);border-color:var(--acc);box-shadow:0 6px 16px rgba(14,27,44,.07)}
.ovc:hover::before{opacity:1}
.ovc-top{display:flex;align-items:baseline;gap:8px;margin-bottom:3px}
.ovc .num{font-family:'IBM Plex Mono',monospace;font-size:11px;color:var(--acc);background:transparent;padding:0;font-weight:600;flex:0 0 auto;min-width:20px}
.ovc .tt{font-size:14px;font-weight:600;line-height:1.3}
.ovc .dd{font-size:12.5px;line-height:1.45;color:var(--muted);margin:0 0 6px 28px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ovc-meta{display:flex;gap:5px;flex-wrap:wrap;margin-left:28px}
.tag{font-family:'IBM Plex Mono',monospace;font-size:9px;letter-spacing:.05em;text-transform:uppercase;padding:2px 6px;border-radius:4px;background:var(--paper-deep);color:var(--muted)}
.tag.reg{background:transparent;border:1px solid var(--line)}
.ovc.soon{opacity:.5;cursor:default;background:transparent}
.ovc.soon:hover{transform:none;border-color:var(--line);box-shadow:none}
.ovc.soon .num{color:#A9B8C7}
.ovc.soon .dd{display:none}
mark{background:var(--part3-soft);color:var(--ink);padding:0 2px;border-radius:2px}

/* ===== ABOUT / CONTACT ===== */
.page{max-width:840px;margin:0 auto;padding:52px 28px 40px}
.page h1{font-family:'Newsreader',serif;font-weight:500;font-size:clamp(32px,4.2vw,44px);line-height:1.1;margin-bottom:18px}
.page h2{font-family:'Newsreader',serif;font-weight:500;font-size:26px;margin:36px 0 12px}
.page p{font-size:16.5px;line-height:1.75;color:var(--body);margin-bottom:16px}
.page .lede{font-size:18.5px;color:var(--muted)}
.contactbox{border:1px solid var(--line);background:#fff;border-radius:14px;padding:24px 26px;margin:26px 0}
.contactbox h3{font-size:17px;margin-bottom:6px}
.contactbox p{font-size:14.5px;color:var(--muted);margin-bottom:14px}
.revealbtn{border:1.5px solid var(--ink);background:var(--ink);color:#fff;border-radius:10px;padding:11px 18px;font:inherit;font-weight:600;font-size:14.5px;cursor:pointer}
.revealbtn:hover{background:#1b2c42}
.mailout{font-family:'IBM Plex Mono',monospace;font-size:16px;color:var(--ink);display:none;align-items:center;gap:10px}
.mailout.on{display:flex}
.mailout a{color:var(--part1);text-decoration:none;border-bottom:1px solid var(--part1-soft)}
.copybtn{border:1px solid var(--line);background:var(--paper);border-radius:7px;padding:4px 9px;font-size:11.5px;cursor:pointer;font-family:'Public Sans',sans-serif}


/* ===== ABOUT v2 ===== */
.page .eyebrow{margin-bottom:14px}
.abgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:18px 0 6px}
.abcard{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 18px 16px}
.abnum{display:block;font-family:'IBM Plex Mono',monospace;font-size:20px;color:var(--part1);font-weight:500;margin-bottom:4px}
.abcard h4{font-size:14px;font-weight:600;margin-bottom:7px}
.abcard p{font-size:13.5px;line-height:1.6;color:var(--muted);margin:0}
.contactbox{border:1px solid var(--line);background:#fff;border-radius:14px;padding:22px 24px;margin:20px 0 14px}
.cbrow{display:flex;gap:26px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.cbrow h3{font-size:16.5px;margin-bottom:6px}
.cbrow p{font-size:14px;color:var(--muted);margin:0;max-width:46ch}
.cbaction{flex:0 0 auto}
.cbnote{font-size:13px;color:var(--muted);margin:16px 0 0;padding-top:14px;border-top:1px solid var(--line)}
@media (max-width:760px){
  .abgrid{grid-template-columns:1fr}
  .cbrow{flex-direction:column;align-items:flex-start;gap:16px}
  .contactbox{padding:18px}
}
/* ===== MOBILE ===== */
@media (max-width:760px){
  .wrap{padding:0 18px}
  .nav-inner{height:56px;gap:10px}
  .wordmark b{font-size:18px}
  .navburger{display:flex}
  .nav-links{position:fixed;top:56px;left:0;right:0;margin:0;background:var(--paper);border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0;padding:8px 18px 16px;margin:0;transform:translateY(-8px);opacity:0;pointer-events:none;transition:opacity .16s,transform .16s;box-shadow:0 14px 30px rgba(14,27,44,.10)}
  .nav-links.open{opacity:1;transform:none;pointer-events:auto}
  .nl{padding:13px 12px;border-radius:10px;font-size:16px;justify-content:flex-start}
  .nl+.nl{border-top:1px solid var(--line)}
  .nl.active{box-shadow:none;background:var(--paper-deep)}
  header{padding:40px 0 30px}
  .hero{gap:28px}
  h1{font-size:clamp(32px,9vw,42px)}
  .lede{font-size:16.5px}
  .ask{max-width:100%}
  .ask input{padding:13px 14px;font-size:15px;min-width:0}
  .ask button{padding:0 16px;font-size:13.5px}
  .hero-facts{gap:18px;font-size:12.5px}
  .build{height:230px}
  .set{grid-template-columns:repeat(6,30px);grid-template-rows:repeat(6,30px);gap:4px}
  .brick{border-radius:6px}
  .set-caption{font-size:10px;white-space:normal;text-align:center;width:90%}
  .brickline span{height:15px;min-width:6px}
  .brickline span::after{display:none}
  .chapter,.page{padding:32px 18px 30px}
  .ch-title{font-size:clamp(26px,7.6vw,34px)}
  .ch-meta{gap:6px}
  .badge{font-size:10px;padding:3px 8px}
  .prose p,.prose ul li,.prose ol li{font-size:16px;line-height:1.7}
  .prose h2{font-size:23px;margin:30px 0 12px}
  .shortanswer{padding:15px 16px;font-size:15.5px}
  .regbox .row{flex-direction:column;gap:6px;padding:13px 14px;font-size:14.5px}
  .regbox .row b{font-size:20px}
  .takeaways{padding:19px 18px}
  .takeaways li{font-size:15px}
  .faq summary{font-size:15px}
  .ptable{display:block;overflow-x:auto;white-space:nowrap;font-size:13.5px;-webkit-overflow-scrolling:touch}
  .vizspec{padding:14px 15px}
  .chnav{grid-template-columns:1fr}
  .chnav .next{text-align:left}
  .ov-controls{top:58px;padding:12px 0 10px}
  .ov-grid{grid-template-columns:1fr;gap:10px}
  .ovhead{padding:32px 0 0}
  .ov-stats{gap:14px;font-size:12.5px}
  .parts-grid{gap:14px}
  .pr-grid{grid-template-columns:1fr}
  .sample .wrap{gap:30px}
  .foot{flex-direction:column;gap:18px}
  .page h1{font-size:clamp(28px,8vw,36px)}
  .page p{font-size:16px}
  .viz{padding:14px 12px 12px}
  .duo{grid-template-columns:1fr;gap:12px}
}
@media (max-width:400px){
  .set{grid-template-columns:repeat(6,26px);grid-template-rows:repeat(6,26px)}
}

/* ===== SISTER SITE ===== */
.sister{padding:0 0 60px}
.sistercard{display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;background:linear-gradient(180deg,#fff,var(--paper-deep));border:1px solid var(--line);border-radius:16px;padding:26px 30px}
.sisterleft{max-width:60ch}
.sisterkicker{font-family:'IBM Plex Mono',monospace;font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--part2);display:block;margin-bottom:8px}
.sistercard h3{font-family:'Newsreader',serif;font-weight:500;font-size:23px;line-height:1.2;margin-bottom:8px}
.sistercard p{font-size:14.5px;line-height:1.65;color:var(--muted);margin:0}
.sisterbtn{display:inline-flex;align-items:center;gap:11px;background:var(--ink);color:#fff;text-decoration:none;border-radius:11px;padding:13px 20px;font-size:14.5px;font-weight:600;white-space:nowrap;transition:transform .15s,box-shadow .15s;flex:0 0 auto}
.sisterbtn:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(14,27,44,.18)}
.sisterbtn em{font-style:normal;margin-left:7px;opacity:.6;font-size:12.5px}
.sisterlogo{display:grid;grid-template-columns:repeat(3,6px);gap:2.5px}
.sisterlogo span{height:6px;border-radius:1.5px;background:#fff;opacity:.85}
.sisterlogo span:nth-child(2){opacity:.55}
.sisterlogo span:nth-child(3){opacity:.35}
@media (max-width:760px){
  .sistercard{padding:20px;gap:18px}
  .sistercard h3{font-size:20px}
  .sisterbtn{width:100%;justify-content:center}
}
/* footer + misc */
.principles{padding:64px 0;border-top:1px solid var(--line)}
.sec-kicker{font-family:'IBM Plex Mono',monospace;font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:10px}
.sec-title{font-family:'Newsreader',serif;font-weight:500;font-size:32px;margin-bottom:26px}
.pr-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.pr{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px}
.pr h5{font-size:15px;margin-bottom:8px}
.pr p{font-size:13.5px;color:var(--muted);line-height:1.6}
.sample{padding:64px 0;background:var(--ink);color:#E8EEF4}
.sample .wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:start}
.sample h2{font-family:'Newsreader',serif;font-weight:500;font-size:34px;line-height:1.15;color:#fff;margin:14px 0 16px}
.sample .eyebrow{color:#93A5B8}.sample .eyebrow::before{background:var(--part2)}
.sample p.d{color:#A9B8C7;font-size:15.5px;max-width:46ch;margin-bottom:22px}
.feat{display:grid;gap:12px;font-size:14.5px;color:#C6D2DE;list-style:none}
.feat li{padding-left:26px;position:relative}
.feat li::before{content:"✓";position:absolute;left:0;color:var(--part2);font-weight:700}
footer{border-top:1px solid var(--line);padding:36px 0 48px}
.foot{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap;font-size:13px;color:var(--muted)}
.disclaimer{max-width:560px}
@media(max-width:920px){
  .hero{grid-template-columns:1fr}
  .build{height:300px;order:-1}
  .parts-grid{grid-template-columns:1fr}
  .sample .wrap{grid-template-columns:1fr}
  .pr-grid{grid-template-columns:repeat(2,1fr)}
  .nav-links{display:none}
  .duo{grid-template-columns:1fr}
  .chnav{grid-template-columns:1fr}
}

.langtoggle{position:relative;margin-left:auto;margin-right:10px}
.langbtn{display:flex;align-items:center;gap:6px;background:transparent;border:1px solid var(--line);border-radius:9px;height:34px;padding:0 10px;font-family:'IBM Plex Mono',monospace;font-size:11px;letter-spacing:.06em;color:var(--ink);cursor:pointer;transition:border-color .15s,background .15s}
.langbtn:hover{border-color:var(--acc);background:var(--paper-deep)}
.langbtn:focus-visible{outline:2px solid var(--acc);outline-offset:2px}
.langbtn .caret{font-size:9px;color:var(--muted)}
.langmenu{position:absolute;top:calc(100% + 8px);right:0;min-width:172px;background:#fff;border:1px solid var(--line);border-radius:12px;box-shadow:0 10px 30px rgba(26,39,51,.12);padding:6px;z-index:60}
.langmenu .lm-item{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;text-align:left;background:transparent;border:0;border-radius:8px;padding:9px 10px;font-family:'Public Sans',sans-serif;font-size:13.5px;color:var(--ink);cursor:pointer}
.langmenu .lm-item:hover{background:var(--paper-deep)}
.langmenu .lm-item[aria-selected="true"]{font-weight:700}
.langmenu .lm-item .code{font-family:'IBM Plex Mono',monospace;font-size:10.5px;color:var(--muted);letter-spacing:.06em}
.langmenu .lm-item[aria-selected="true"] .code{color:var(--acc)}
.langmenu .lm-note{padding:8px 10px 6px;font-size:11.5px;color:var(--muted);border-top:1px solid var(--line);margin-top:4px}
.langmenu .lm-soon{cursor:default;color:var(--muted)}
.langmenu .lm-soon:hover{background:transparent}
.xlate-note{margin-top:10px;font-size:12.5px;color:var(--muted);border-left:3px solid var(--acc-soft);padding-left:10px;max-width:560px}
@media(max-width:400px){.langbtn span#langCur{display:none}}

/* production additions */
a.golink{color:inherit;text-decoration:none}
a.badge,a.nl,a.wordmark,span.wordmark a{color:inherit;text-decoration:none}
.chnav a{text-decoration:none;color:inherit}
.prose a.chref,.shortanswer a.chref,.faq a.chref,.sources a.chref{color:var(--part1);text-decoration:none;border-bottom:1px solid var(--part1-soft)}
.prose a.chref:hover,.sources a.chref:hover{border-bottom-color:var(--part1)}
a.toc-row{display:flex;color:inherit;text-decoration:none}
a.ovc{display:block;color:inherit;text-decoration:none}
.parts-grid .part{position:relative;cursor:pointer}
.parts-grid .part a.go::after{content:"";position:absolute;inset:0;z-index:1}
.brickline a{flex:1 0 8px;height:20px;min-width:8px;border-radius:4px;opacity:.92;transition:transform .12s,opacity .12s;position:relative;display:block}
.brickline a{max-width:22px}
.brickline a:hover{transform:translateY(-4px);opacity:1}
.brickline a::after{content:attr(data-t);position:absolute;bottom:130%;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;font-size:11.5px;padding:5px 9px;border-radius:6px;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .12s;z-index:5}
.brickline a:hover::after{opacity:1}
@media (max-width:760px){.brickline a{height:15px;min-width:6px;max-width:11px}.brickline a::after{display:none}}
.skip{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:8px 14px;border-radius:0 0 8px 0;z-index:99}
.skip:focus{left:0}
.view{display:block}
.mnt th{text-align:left;font-size:12.5px;color:var(--muted);font-weight:600;padding:8px 10px;border-bottom:1.5px solid var(--line)}
.mnt td{padding:8px 10px;border-bottom:1px solid var(--paper-deep);font-size:14px}
.mnt .asof{font-family:'IBM Plex Mono',monospace;font-size:10.5px;color:var(--muted)}