:root{
    --paper: oklch(98% 0.003 85);
    --band: oklch(15% 0.006 75);
    --panel: oklch(18% 0.006 75);
    --ink-l: oklch(22% 0.008 85);
    --ink-d: oklch(96.5% 0.004 85);
    --mut-l: oklch(49% 0.01 85);
    --mut-d: oklch(64% 0.008 80);
    --line-l: oklch(90.5% 0.005 85);
    --line-d: oklch(26.5% 0.007 78);
    --frame: oklch(79% 0.007 85);
    --gold: #CCA452;
    --gold-ink: oklch(52% 0.09 85);
  }
  *{box-sizing:border-box;margin:0}
  @media(prefers-reduced-motion:no-preference){html{scroll-behavior:smooth}}
  body{background:var(--paper);color:var(--ink-l);font:16.5px/1.6 "Geist",system-ui,sans-serif;-webkit-font-smoothing:antialiased}
  .mono{font-family:"Geist Mono",ui-monospace,monospace;overflow-wrap:anywhere}
  a{text-decoration:none;color:inherit}
  .wrap{max-width:1140px;margin:0 auto;padding:0 48px}
  @media(max-width:760px){.wrap{padding:0 22px}}
  nav{background:var(--band);color:var(--ink-d)}
  .nav-in{display:flex;justify-content:space-between;align-items:center;padding:18px 48px;max-width:1280px;margin:0 auto}
  @media(max-width:760px){.nav-in{padding:14px 22px}}
  .brand{display:flex;align-items:center;gap:11px;font-weight:700;letter-spacing:-.02em;font-size:17px}
  .brand .mark{width:30px;height:30px;border-radius:6px;background:#000 url("../assets/vt-logo-black.png") center/230% no-repeat}
  nav ul{display:flex;gap:26px;list-style:none;font-size:14px;color:var(--mut-d)}
  nav ul a:hover{color:var(--ink-d)}
  nav ul a.here{color:var(--ink-d);font-weight:600}
  .menu-btn{display:none;background:none;border:1px solid var(--line-d);border-radius:6px;color:var(--ink-d);font:600 13px "Geist",sans-serif;padding:8px 12px;cursor:pointer;letter-spacing:.04em}
  @media(max-width:760px){
    .nav-in{flex-wrap:wrap}
    nav ul{display:none}
    .menu-btn{display:inline-block}
    nav.open ul{display:flex;flex-direction:column;gap:14px;flex-basis:100%;order:5;padding:14px 0 4px;border-top:1px solid var(--line-d);margin-top:12px}
  }
  .navcta{font-size:14px;font-weight:600;background:var(--ink-d);color:var(--band);padding:9px 18px;border-radius:6px}
  section{padding:76px 0}
  .crosshair{position:relative}
  .crosshair::before{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--line-l) 1px,transparent 1px),linear-gradient(90deg,var(--line-l) 1px,transparent 1px);background-size:72px 72px;mask-image:radial-gradient(ellipse 85% 75% at 50% 30%,black 30%,transparent 72%);pointer-events:none}
  .sec-head{position:relative;display:flex;align-items:baseline;justify-content:space-between;gap:18px;margin-bottom:34px;flex-wrap:wrap}
  h2{font-size:clamp(26px,3vw,34px);letter-spacing:-.026em;font-weight:640;text-wrap:balance}
  .sec-head .mono{font-size:11.5px;letter-spacing:.12em;color:var(--mut-l)}
  .askagain{background:var(--band);color:var(--ink-d);text-align:center}
  .askagain h2{color:var(--ink-d);max-width:22ch;margin:0 auto}
  .askagain p.lead{margin:16px auto 0;font-size:16.5px;color:var(--mut-d);max-width:52ch;line-height:1.6}
  .askbtn{display:inline-block;font:650 16px "Geist",sans-serif;background:var(--ink-d);color:var(--band);border:none;border-radius:8px;padding:15px 26px;cursor:pointer;transition:transform .2s cubic-bezier(.2,.8,.2,1);margin-top:28px}
  .askbtn:hover{transform:translateX(2px)}
  .askmicro{margin-top:14px;font-family:"Geist Mono",monospace;font-size:11px;letter-spacing:.12em;color:var(--mut-d)}
  .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
  .pgbar{position:fixed;top:0;left:0;height:3px;width:0;background:var(--gold);z-index:999}
  footer{background:var(--band);color:var(--mut-d);border-top:1px solid var(--line-d)}
  .foot3{max-width:1280px;margin:0 auto;padding:52px 48px 36px;display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:44px;font-size:14px}
  @media(max-width:860px){.foot3{grid-template-columns:1fr;padding:40px 22px 30px}}
  .foot3 a:hover{color:var(--ink-d)}
  .flinks{list-style:none;display:grid;gap:10px;font-family:"Geist Mono",ui-monospace,monospace;font-size:11.5px;letter-spacing:.1em;padding:0}
  .fask{display:flex;gap:8px;margin-top:12px}
  .fask input{flex:1;min-width:0;font:14px "Geist",sans-serif;padding:10px 12px;border:1px solid var(--line-d);border-radius:6px;background:var(--panel);color:var(--ink-d)}
  .fask input::placeholder{color:var(--mut-d)}
  .fask button{font:600 13px "Geist",sans-serif;background:var(--ink-d);color:var(--band);border:none;border-radius:6px;padding:10px 14px;cursor:pointer}
  .footbase{max-width:1280px;margin:0 auto;padding:0 48px 26px;font-size:12.5px;color:var(--mut-d)}
  @media(max-width:860px){.footbase{padding:0 22px 22px}}
  @media(prefers-reduced-motion:reduce){
    *,*::before,*::after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}
  }

  .casehero{background:var(--band);color:var(--ink-d);padding:84px 0 72px;text-align:center}
  .eyebrow{font-family:"Geist Mono",monospace;font-size:12px;letter-spacing:.14em;color:var(--mut-d);margin-bottom:22px}
  .eyebrow .goldtag{color:var(--gold)}
  h1{font-size:clamp(38px,4.6vw,58px);line-height:1.04;letter-spacing:-.038em;font-weight:650;text-wrap:balance}
  .qmark{font-size:10.5px;letter-spacing:.16em;color:var(--mut-d);margin-bottom:14px}
  .casehero h1{max-width:20ch;margin:0 auto}
  .answer{margin-top:52px;padding-top:38px;border-top:1px solid var(--line-d)}
  .amark{font-size:10.5px;letter-spacing:.16em;color:var(--gold);margin-bottom:10px}
  .pnum{display:block;font-size:clamp(52px,9vw,104px);font-weight:650;letter-spacing:-.045em;line-height:1;font-variant-numeric:tabular-nums;color:var(--gold)}
  html.js .pnum{opacity:0;transform:translateY(6px);transition:opacity .5s ease,transform .5s ease}
  html.js .answer.settled .pnum,html.js #pair.settled .pnum{opacity:1;transform:none}
  .plab{margin-top:14px;font-size:10.5px;letter-spacing:.14em;color:var(--mut-d)}
  .walked-p{font-size:18.5px;line-height:1.7;color:var(--mut-l);max-width:62ch;position:relative}
  .walked-p .ct{color:var(--ink-l);font-weight:650;font-variant-numeric:tabular-nums}
  .momentband{background:var(--band);color:var(--ink-d)}
  .mcap{font-size:11px;letter-spacing:.14em;color:var(--mut-d)}
  .mcap .goldtag{color:var(--gold)}
  .mscreen{margin-top:18px;border:1px dashed var(--line-d);border-radius:12px;background:var(--panel);padding:28px 32px;font-size:14px;line-height:2.1;color:var(--ink-d)}
  @media(max-width:640px){.mscreen{padding:20px 18px;font-size:12.5px}}
  .tline{white-space:pre-wrap;min-height:2.1em}
  .tline.cur::after{content:"";display:inline-block;width:7px;height:.95em;background:var(--ink-d);margin-left:3px;vertical-align:-.12em;animation:mblink 1.1s step-end infinite}
  @keyframes mblink{50%{opacity:0}}
  .steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;position:relative}
  @media(max-width:1000px){.steps{grid-template-columns:repeat(2,1fr)}}
  @media(max-width:600px){.steps{grid-template-columns:1fr}}
  .step{border:1px solid var(--line-l);border-radius:12px;background:oklch(99% 0.002 85);padding:26px 28px}
  html.js .step{opacity:.3;transform:translateY(10px);transition:opacity .6s ease,transform .6s ease,border-color .6s ease}
  html.js .step.lit{opacity:1;transform:none}
  .step.lit{border-color:var(--ink-l)}
  .step .mono{display:block;font-size:10.5px;letter-spacing:.14em;color:var(--mut-l);white-space:nowrap}
  .step.lit .mono{color:var(--gold-ink)}
  .step h3{font-size:19px;font-weight:650;letter-spacing:-.015em;margin:10px 0 8px;line-height:1.22}
  @media(min-width:600px){.step h3{min-height:2.44em}}
  .step p{font-size:14.5px;color:var(--mut-l);line-height:1.6}
  .chartwrap{border:1px solid var(--line-l);border-radius:12px;background:oklch(99% 0.002 85);padding:26px 26px 12px;position:relative}
  .chartwrap svg{width:100%;height:auto;display:block;max-width:680px;margin:0 auto}
  .chart-cap{font-family:"Geist Mono",monospace;font-size:10.5px;letter-spacing:.12em;color:var(--mut-l);margin-bottom:14px}
  .chart-unit{font-family:"Geist Mono",monospace;font-size:10px;letter-spacing:.12em;color:var(--mut-l);padding:10px 2px 8px;border-top:1px dashed var(--line-l);margin-top:6px}
  .chart-note{font-family:"Geist Mono",monospace;font-size:10px;letter-spacing:.12em;color:var(--gold-ink);padding:0 2px 8px}
  .cbase{stroke:var(--frame);stroke-width:1}
  .cbar rect{fill:var(--gold)}
  .cbar:hover rect{filter:brightness(1.12)}
  .scrub{display:flex;align-items:center;gap:16px;max-width:680px;margin:6px auto 2px;padding:0 4px}
  .scrub label{font-size:9.5px;letter-spacing:.12em;color:var(--mut-l);white-space:nowrap}
  .scrub input{flex:1;appearance:none;-webkit-appearance:none;height:2px;background:var(--line-l);border-radius:2px;cursor:ew-resize}
  .scrub input::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;border-radius:50%;background:var(--paper);border:2px solid var(--gold);cursor:ew-resize}
  .scrub input::-moz-range-thumb{width:18px;height:18px;border-radius:50%;background:var(--paper);border:2px solid var(--gold);cursor:ew-resize}
  html:not(.js) .scrub{display:none}
  #casechart.scrubbing .cbar rect,#casechart.scrubbing .cbar .cval{transition:none}
  .filelog .sec-head{margin-bottom:6px}
  .flog{position:relative;padding-left:54px}
  .flog::before{content:"";position:absolute;left:15px;top:8px;bottom:8px;width:2px;background:var(--line-l)}
  html.js .flog::after{content:"";position:absolute;left:15px;top:8px;width:2px;height:var(--spineh,0%);max-height:calc(100% - 16px);background:var(--gold)}
  .fnode{position:relative;padding:30px 0}
  .fnode::before{content:"";position:absolute;left:-45px;top:32px;width:12px;height:12px;border-radius:50%;background:var(--paper);border:2px solid var(--frame);z-index:1}
  html.js .fnode::before{transition:border-color .4s ease,background .4s ease}
  html.js .fnode.lit::before{border-color:var(--gold);background:var(--gold)}
  .fmark{font-size:11px;letter-spacing:.14em;color:var(--mut-l);margin-bottom:12px}
  .fnode h3{font-size:21px;font-weight:650;letter-spacing:-.018em;margin:0 0 8px}
  .fnode .fp{font-size:15.5px;color:var(--mut-l);line-height:1.7;max-width:68ch}
  .fnode .mscreen{margin-top:0;color:var(--ink-d)}
  .fnode .swap{background:oklch(99% 0.002 85)}
  @media(max-width:640px){.flog{padding-left:32px}.flog::before{left:7px}html.js .flog::after{left:7px}.fnode::before{left:-31px}}
  html.js .cbar rect{transform:scaleY(0);transform-origin:bottom;transform-box:fill-box;transition:transform .8s cubic-bezier(.2,.8,.2,1)}
  html.js #casechart.drawn .cbar rect{transform:scaleY(1)}
  .cbar .cval{font:600 19px "Geist",system-ui,sans-serif;fill:var(--ink-l)}
  html.js .cbar .cval{opacity:0;transition:opacity .5s ease}
  html.js #casechart.drawn .cbar .cval{opacity:1}
  .clab{font:11px "Geist Mono",ui-monospace,monospace;fill:var(--mut-l);letter-spacing:.06em}
  .statrow{display:flex;gap:clamp(28px,6vw,64px);flex-wrap:wrap;padding:18px 4px 10px}
  .statitem .n{display:block;font-size:clamp(40px,5vw,64px);font-weight:650;letter-spacing:-.03em;font-variant-numeric:tabular-nums;line-height:1.05}
  .statitem .lab{display:block;margin-top:8px;font-family:"Geist Mono",monospace;font-size:10px;letter-spacing:.12em;color:var(--mut-l);line-height:1.7}
  .changedband{background:oklch(96.5% 0.004 85)}
  .impact{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;position:relative}
  @media(max-width:860px){.impact{grid-template-columns:1fr}}
  .imp{border:1px solid var(--line-l);border-radius:10px;background:var(--paper);padding:20px 24px}
  .imp .n{display:block;font-size:clamp(26px,2.8vw,34px);font-weight:650;letter-spacing:-.025em;font-variant-numeric:tabular-nums}
  .imp .lab{display:block;margin-top:6px;font-family:"Geist Mono",monospace;font-size:10px;letter-spacing:.12em;color:var(--mut-l);line-height:1.7}
  .changed-note{margin-top:22px;font-size:15.5px;color:var(--mut-l);max-width:62ch;line-height:1.65;position:relative}
  .changed-note b{color:var(--ink-l);font-weight:600}
  .swap{margin-top:30px;border:1px solid var(--line-l);border-radius:12px;background:var(--paper);padding:24px 26px;position:relative}
  .swap-head{display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:8px}
  .swap-head>.mono{font-size:10.5px;letter-spacing:.12em;color:var(--mut-l)}
  .swap-btn{display:flex;align-items:center;gap:12px;background:none;border:none;cursor:pointer;padding:4px 0}
  .swap-opt{font-family:"Geist Mono",ui-monospace,monospace;font-size:10.5px;letter-spacing:.12em;color:var(--mut-l);transition:color .25s}
  .swap-opt.on{color:var(--ink-l);font-weight:600}
  .swap-track{width:46px;height:24px;border-radius:999px;border:1px solid var(--frame);position:relative;background:var(--paper);flex-shrink:0;transition:border-color .25s}
  .swap-knob{position:absolute;top:2px;left:2px;width:18px;height:18px;border-radius:50%;background:var(--ink-l);transition:transform .3s cubic-bezier(.3,.7,.25,1),background .25s}
  .swap-btn[aria-checked="true"] .swap-knob{transform:translateX(22px);background:var(--gold)}
  .swap-btn[aria-checked="true"] .swap-track{border-color:var(--gold)}
  .swap-btn:focus-visible{outline:2px solid var(--ink-l);outline-offset:2px;border-radius:6px}
  .srow{display:flex;justify-content:space-between;align-items:baseline;gap:18px;padding:13px 2px;border-top:1px dashed var(--line-l)}
  .slab{font-size:10px;letter-spacing:.12em;color:var(--mut-l);flex-shrink:0}
  .sval{font-weight:650;letter-spacing:-.012em;font-size:16px;text-align:right;font-variant-numeric:tabular-nums;transition:transform .17s ease,opacity .17s ease}
  .sval.flipping{transform:translateY(-7px);opacity:0}
  .sval.lit{color:var(--gold-ink)}
  .evband{background:var(--band);color:var(--ink-d)}
  .tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:20px}
  .tabbtn{font-family:"Geist Mono",ui-monospace,monospace;font-size:10.5px;letter-spacing:.12em;padding:10px 16px;border:1px solid var(--line-d);background:transparent;color:var(--mut-d);border-radius:999px;cursor:pointer;transition:color .2s,border-color .2s}
  .tabbtn:hover{color:var(--ink-d)}
  .tabbtn.on{color:var(--gold);border-color:var(--gold)}
  .tabpane{display:none}
  .tabpane.on{display:block}
  html:not(.js) .tabs{display:none}
  html:not(.js) .tabpane{display:block;margin-top:16px}
  .fileprose{border:1px solid var(--line-d);border-radius:12px;background:var(--panel);padding:22px 26px;font-size:14.5px;line-height:1.7;color:var(--ink-d)}
  .evband h2{color:var(--ink-d)}
  .evband .sec-head .mono{color:var(--mut-d)}
  .evrows{border:1px solid var(--line-d);border-radius:12px;background:var(--panel);overflow:hidden;position:relative}
  .evrow{border-top:1px dashed var(--line-d)}
  .evrow:first-child{border-top:none}
  .evrow summary{display:flex;justify-content:space-between;align-items:baseline;gap:24px;padding:18px 24px;cursor:pointer;list-style:none;font:inherit;color:inherit}
  .evrow summary::-webkit-details-marker{display:none}
  .evrow summary:focus-visible{outline:2px solid var(--ink-d);outline-offset:-2px}
  .evlab{font-family:"Geist Mono",ui-monospace,monospace;font-size:10.5px;letter-spacing:.14em;color:var(--gold);flex-shrink:0;padding-top:3px}
  .evmask{font-family:"Geist Mono",ui-monospace,monospace;font-size:10px;letter-spacing:.12em;color:var(--mut-d)}
  .evval{display:none;font-size:14.5px;color:var(--ink-d);line-height:1.6;max-width:56ch;text-align:right;padding:0 24px 18px;margin-left:auto}
  .evrow[open] .evmask,.evrow:hover .evmask{display:none}
  .evrow[open] .evval{display:block;animation:evin .3s ease}
  .evrow:hover .evval{display:block}
  @keyframes evin{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}
  @media(max-width:640px){.evrow summary{flex-direction:column;gap:8px}.evval{text-align:left;margin-left:0}}
  .measure{margin-bottom:18px;border:1px solid var(--line-l);border-radius:10px;background:var(--paper)}
  .measure summary{cursor:pointer;font-family:"Geist Mono",monospace;font-size:10.5px;letter-spacing:.12em;color:var(--mut-l);padding:13px 18px;list-style:none}
  .measure summary::before{content:"+ "}
  .measure[open] summary::before{content:"- "}
  .measure p{padding:0 18px 15px;font-size:14px;color:var(--mut-l);line-height:1.6}
  .rule-line{border:1px dashed var(--frame);border-radius:12px;background:var(--paper);padding:22px 26px;font-size:15.5px;color:var(--mut-l);position:relative;line-height:1.65}
  #rule{overflow:hidden}
  html.js .rule-line{opacity:0;transform:scale(1.45) rotate(-5deg)}
  html.js .rule-line.stamped{opacity:1;transform:scale(1) rotate(-.7deg);transition:transform .4s cubic-bezier(.2,1.5,.35,1),opacity .22s ease}
  .rule-line::before{content:"THE RULE IT LEFT BEHIND";position:absolute;top:-8px;left:24px;background:var(--paper);padding:0 10px;font-family:"Geist Mono",monospace;font-size:10px;letter-spacing:.12em;color:var(--mut-l)}
  .rule-line b{color:var(--ink-l);font-weight:600}
  .meansband{padding-top:0}
  .means-card{border:1px solid var(--line-l);border-left:3px solid var(--gold);border-radius:12px;background:oklch(99% 0.002 85);padding:26px 30px;font-size:16px;line-height:1.7;color:var(--mut-l);max-width:72ch;position:relative}
  .means-card b{color:var(--ink-l);font-weight:600}
  .filenav{margin-top:30px;font-family:"Geist Mono",monospace;font-size:11px;letter-spacing:.12em;color:var(--mut-l);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;position:relative}
  .filenav a{text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px}
  .filenav a:hover{color:var(--ink-l)}

  .pagehead{background:var(--band);color:var(--ink-d);padding:80px 0 64px;text-align:center}
  .sub{margin:18px auto 0;font-size:18px;color:var(--mut-d);max-width:52ch;line-height:1.55}
  .cgrid{display:grid;grid-template-columns:repeat(3,1fr);grid-auto-flow:dense;gap:14px;position:relative}
  @media(max-width:1000px){.cgrid{grid-template-columns:repeat(2,1fr)}}
  @media(max-width:640px){.cgrid{grid-template-columns:1fr}}
  .cfile{display:flex;flex-direction:column;border:1px solid var(--line-l);border-radius:12px;background:oklch(99% 0.002 85);padding:24px 26px;transition:transform .25s cubic-bezier(.2,.8,.2,1),box-shadow .25s,border-color .25s}
  .cfile:hover{transform:translateY(-3px);box-shadow:0 8px 26px oklch(0% 0 0/.08);border-color:var(--ink-l)}
  .cfile:focus-visible{outline:2px solid var(--ink-l);outline-offset:2px}
  .cfile.wide{grid-column:span 2;background:var(--band);border-color:var(--line-d)}
  .cfile.wide .ctag{color:var(--gold)}
  .cfile.wide .cb{color:var(--mut-d)}
  .cfile.wide .ca{color:var(--ink-d);font-size:30px}
  .cfile.wide p{color:var(--mut-d);font-size:14.5px}
  .cfile.wide .copen{color:var(--mut-d)}
  .cfile.wide:hover{border-color:var(--gold)}
  .cfile.wide:hover .copen{color:var(--gold)}
  @media(max-width:640px){.cfile.wide{grid-column:span 1}}
  .ctag{font-size:10px;letter-spacing:.12em;color:var(--mut-l)}
  .cpair{margin:14px 0 10px;line-height:1.3}
  .cb{display:block;font-size:14px;font-weight:450;color:var(--mut-l);font-variant-numeric:tabular-nums}
  .ca::before{content:"\2192  ";color:var(--gold);font-weight:400}
  .ca.plain::before{content:"\00B7  "}
  .ca{display:block;font-size:23px;font-weight:650;letter-spacing:-.022em;margin-top:4px;font-variant-numeric:tabular-nums}
  .ca .num{color:var(--gold-ink)}
  .cfile.wide .ca .num{color:var(--gold)}
  .cfile p{font-size:13.5px;color:var(--mut-l);line-height:1.55;flex:1}
  .copen{margin-top:16px;font-size:10.5px;letter-spacing:.12em;color:var(--mut-l);transition:color .25s}
  .cfile:hover .copen{color:var(--gold-ink)}

  @media(max-width:760px){.qmark,.amark,.plab,.step .mono,.chart-cap,.chart-unit,.chart-note,.scrub label,.statitem .lab,.imp .lab,.swap-head>.mono,.swap-opt,.slab,.tabbtn,.evlab,.evmask,.measure summary,.rule-line::before,.ctag,.copen{font-size:11px}}
  @media(max-width:760px){.flinks li a{display:inline-block;padding:5px 0}}
  @media(max-width:420px){.scrub{flex-wrap:wrap}.scrub input{width:100%;max-width:100%}}