*{box-sizing:border-box}
:root{
  --paper:oklch(97.6% .012 86);
  --paper-deep:oklch(94.5% .022 82);
  --surface:oklch(99.2% .006 88);
  --ink:oklch(25% .04 276);
  --muted:oklch(51% .035 273);
  --line:oklch(86% .028 282);
  --violet:oklch(49% .19 282);
  --violet-dark:oklch(30% .13 280);
  --violet-soft:oklch(91.5% .055 288);
  --coral:oklch(64% .17 29);
  --green:oklch(56% .13 151);
  --amber:oklch(68% .13 76);
  --goodbg:oklch(92.5% .055 150);
  --badbg:oklch(93% .055 28);
  --openbg:oklch(93.5% .06 82);
  --shadow:0 22px 60px oklch(25% .06 276 / .1);
  --display:"Noto Sans Display","Segoe UI Variable Display","Helvetica Neue",sans-serif;
  --body:"Noto Sans","Segoe UI",Arial,sans-serif;
}
html{scroll-behavior:smooth;scroll-padding-top:82px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation-duration:.01ms!important;transition-duration:.01ms!important}}
body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 var(--body);text-rendering:optimizeLegibility}
a{color:var(--violet);text-underline-offset:3px}
a:hover{color:var(--violet-dark)}
button,input,textarea{font:inherit}
button,a{touch-action:manipulation}
:focus-visible{outline:3px solid var(--coral);outline-offset:3px}
.wrap{width:min(1180px,calc(100% - 40px));margin-inline:auto}
.top{position:sticky;top:0;z-index:20;background:oklch(97.6% .012 86 / .94);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
.bar{min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-family:var(--display);font-weight:760;text-decoration:none;letter-spacing:-.02em}
.brand:hover{color:var(--ink)}
.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:var(--violet);color:var(--surface);font-size:12px;letter-spacing:-.04em}
.tag{font:600 11px/1 var(--body);letter-spacing:.04em;color:var(--muted);border:1px solid var(--line);border-radius:99px;padding:5px 8px}
nav{display:flex;align-items:center;gap:24px}
nav a{color:var(--ink);font-size:14px;font-weight:650;text-decoration:none}
nav a:hover{color:var(--violet)}
nav .nav-cta{padding:9px 15px;border-radius:8px;background:var(--ink);color:var(--surface)}
nav .nav-cta:hover{background:var(--violet);color:var(--surface)}

h1,h2,h3{font-family:var(--display);text-wrap:balance}
h1{margin:14px 0 24px;font-size:clamp(3.1rem,5.35vw,4.85rem);font-weight:760;line-height:.94;letter-spacing:-.065em;max-width:11.8ch}
h2{margin:8px 0 0;font-size:clamp(2.15rem,4.4vw,4.35rem);font-weight:740;line-height:1.02;letter-spacing:-.05em;max-width:14ch}
h3{letter-spacing:-.025em}
p{max-width:72ch;text-wrap:pretty}
.eyebrow,.kicker{margin:0;color:var(--violet);font-weight:760;font-size:13px;letter-spacing:.09em;text-transform:uppercase}
.section{padding-block:clamp(76px,10vw,132px)}
.section-head{margin-bottom:clamp(38px,6vw,72px)}
.split-head{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(280px,.7fr);gap:clamp(36px,8vw,110px);align-items:end}
.split-head>p{margin:0;color:var(--muted);font-size:18px;line-height:1.65}
.split-head.compact{align-items:center;margin-bottom:38px}

.hero{min-height:calc(100svh - 70px);display:grid;grid-template-columns:minmax(0,1.12fr) minmax(360px,.88fr);gap:clamp(40px,7vw,96px);align-items:center;padding-block:clamp(56px,6vw,82px)}
.hero-copy{position:relative;z-index:1}
.hero-lede{margin:0;max-width:62ch;color:var(--muted);font-size:clamp(18px,2vw,23px);line-height:1.55;text-wrap:pretty}
#hero-stat{color:var(--ink)}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:32px}
.button{appearance:none;display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:11px 20px;border:1px solid transparent;border-radius:9px;font-weight:740;text-decoration:none;cursor:pointer;transition:transform .18s ease-out,background .18s ease-out,border-color .18s ease-out}
.button:hover{transform:translateY(-2px)}
.button.primary{background:var(--violet);color:var(--surface)}
.button.primary:hover{background:var(--violet-dark);color:var(--surface)}
.button.secondary{border-color:var(--line);background:transparent;color:var(--ink)}
.button.secondary:hover{border-color:var(--violet);color:var(--violet)}
.button.light{background:var(--surface);color:var(--violet-dark)}
.hero-note{margin:15px 0 0;color:var(--muted);font-size:13px}
.hero-flow{position:relative;min-height:520px;padding:38px;border-radius:28px;background:var(--violet-dark);color:var(--surface);box-shadow:var(--shadow);overflow:hidden}
.hero-flow:before{content:"";position:absolute;inset:-10% -45% auto 30%;height:62%;border-radius:50%;background:oklch(62% .22 294 / .5);filter:blur(1px);transform:rotate(-18deg)}
.hero-flow:after{content:"";position:absolute;width:260px;height:260px;right:-100px;bottom:-90px;border:1px solid oklch(90% .08 290 / .28);border-radius:50%;box-shadow:0 0 0 36px oklch(90% .08 290 / .08),0 0 0 72px oklch(90% .08 290 / .05)}
.flow-source,.flow-model,.flow-result{position:relative;z-index:1}
.flow-source span,.flow-result>span{display:block;font-size:11px;font-weight:760;letter-spacing:.1em;text-transform:uppercase;color:oklch(86% .065 290)}
.flow-source blockquote{margin:12px 0 38px;font-family:var(--display);font-size:clamp(25px,3vw,37px);font-weight:650;line-height:1.18;letter-spacing:-.035em}
.flow-model{display:flex;align-items:center;gap:14px;margin-bottom:34px;padding:18px 0;border-top:1px solid oklch(90% .04 290 / .28);border-bottom:1px solid oklch(90% .04 290 / .28)}
.flow-model strong{display:grid;place-items:center;width:58px;height:58px;border-radius:50%;background:var(--coral);color:var(--surface);font:760 18px/1 var(--display)}
.flow-model span{max-width:18ch;color:oklch(92% .025 290);font-size:14px;line-height:1.4}
.flow-result{padding-top:28px;border-top:1px solid oklch(90% .04 290 / .28)}
.flow-result code{display:block;margin:3px 0 -2px;color:oklch(88% .13 80);font:760 clamp(54px,7vw,84px)/1 var(--display);letter-spacing:-.06em}
.flow-result strong{font-size:15px;font-weight:600;color:oklch(92% .025 290)}
.flow-result small{display:block;width:max-content;margin-top:15px;padding:5px 9px;border-radius:6px;background:oklch(82% .12 151 / .17);color:oklch(90% .08 151);font-weight:720}

.semantic-section{padding-bottom:clamp(84px,11vw,150px)}
.semantic-examples{list-style:none;margin:0;padding:0;border-top:1px solid var(--line);counter-reset:semantic}
.semantic-examples li{counter-increment:semantic;display:grid;grid-template-columns:52px minmax(260px,1.15fr) minmax(260px,.85fr);gap:clamp(22px,5vw,68px);align-items:center;padding:clamp(28px,4vw,46px) 0;border-bottom:1px solid var(--line)}
.semantic-examples li:before{content:counter(semantic,decimal-leading-zero);align-self:start;color:var(--coral);font:780 14px/1 var(--display);letter-spacing:.06em}
.semantic-source span{display:block;margin-bottom:9px;color:var(--violet);font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}
.semantic-source blockquote{margin:0;font:650 clamp(21px,2.45vw,31px)/1.28 var(--display);letter-spacing:-.025em}
.semantic-result{position:relative;padding-left:46px}
.semantic-result:before{content:"→";position:absolute;left:0;top:8px;color:var(--coral);font:500 25px/1 var(--display)}
.semantic-result code{display:block;color:var(--violet-dark);font:780 clamp(29px,3.8vw,48px)/1 var(--display);letter-spacing:-.045em}
.semantic-result strong{display:block;margin-top:5px;font-size:15px;line-height:1.4}
.semantic-result p{margin:12px 0 0;color:var(--muted);font-size:14px;line-height:1.5}
.semantic-proof{display:inline-flex;align-items:center;gap:7px;margin-top:13px;color:oklch(40% .12 151);font-size:12px;font-weight:740}
.semantic-proof:before{content:"✓";display:grid;place-items:center;width:20px;height:20px;border-radius:50%;background:var(--goodbg)}
.semantic-index{display:block;margin-top:5px;color:var(--muted);font-size:11px}
.selection-note{margin:24px 0 0;color:var(--muted);font-size:13px}

.method{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}
.method li{display:grid;grid-template-columns:110px minmax(0,1fr);gap:26px;padding:28px 0;border-bottom:1px solid var(--line)}
.method-number{color:var(--coral);font-family:var(--display);font-size:18px;font-weight:780}
.method h3{margin:0 0 5px;font-size:clamp(22px,2.6vw,31px)}
.method p{margin:0;color:var(--muted);font-size:17px}
.code-story{display:grid;grid-template-columns:minmax(270px,.75fr) minmax(0,1.25fr);gap:clamp(45px,8vw,108px);padding:clamp(32px,5vw,64px);background:var(--surface);border:1px solid var(--line);border-radius:24px;box-shadow:0 16px 44px oklch(25% .04 276 / .055)}
.code-story-intro>p:not(.eyebrow){color:var(--muted)}
.code-story h2{font-size:clamp(2rem,3.6vw,3.5rem)}
.finding-card{margin-top:32px;padding:20px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.finding-card span,.finding-card small{display:block;color:var(--muted);font-size:12px}
.finding-card strong{display:block;margin:5px 0 4px;font:700 20px/1.3 var(--display)}
ol.anatomy{position:relative;list-style:none;margin:0;padding:0}
ol.anatomy:before{content:"";position:absolute;left:18px;top:20px;bottom:28px;width:2px;background:var(--line)}
ol.anatomy li{position:relative;display:grid;grid-template-columns:38px 104px minmax(0,1fr);gap:14px;align-items:start;padding:0 0 25px}
.anatomy-marker{position:relative;z-index:1;display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--paper);border:2px solid var(--violet);color:var(--violet);font:750 12px/1 var(--display)}
ol.anatomy li:last-child .anatomy-marker{background:var(--violet);color:var(--surface)}
ol.anatomy .step{padding-top:8px;color:var(--muted);font-size:12px;font-weight:700}
ol.anatomy .val{padding-top:5px;font-size:16px;line-height:1.45}
ol.anatomy li:last-child .val{font-weight:760;color:var(--violet-dark)}
.anatomy-cap{margin:8px 0 0 52px;color:var(--muted);font-size:14px}

.evidence-band{background:oklch(92.5% .045 288)}
.evidence-band .section-head>p{color:oklch(43% .045 278)}
.outcome-panel{display:grid;grid-template-columns:minmax(250px,.62fr) minmax(0,1.38fr);gap:clamp(34px,7vw,90px);align-items:center;padding:clamp(28px,5vw,58px);background:var(--surface);border-radius:22px;box-shadow:0 15px 45px oklch(35% .08 280 / .09)}
.outcome-copy h3{margin:0 0 10px;font-size:clamp(24px,3vw,34px)}
.outcome-copy p{margin:0;color:var(--muted)}
.split{display:flex;gap:3px;height:24px;border-radius:7px;overflow:hidden;border:1px solid var(--line)}
.split i{display:block}
.split i.good,.dot.good{background:var(--green)}
.split i.bad,.dot.bad{background:var(--coral)}
.split i.open,.dot.open{background:var(--amber)}
.legend{list-style:none;margin:20px 0 0;padding:0;display:grid;gap:12px}
.legend li{display:grid;grid-template-columns:12px 66px 112px 1fr;gap:6px 11px;align-items:center;font-size:14px}
.legend b{font-variant-numeric:tabular-nums;text-align:right;font-size:16px}
.legend .dot{width:12px;height:12px;border-radius:3px}
.legend .lab{font-weight:740}
.legend .muted{color:var(--muted)}
.outcome-note{margin:20px 0 0;padding-top:17px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
.depth-panel{margin-top:54px;padding-top:46px;border-top:1px solid oklch(75% .06 282)}
.accuracy-detail{display:grid;grid-template-columns:290px minmax(0,1fr);gap:clamp(30px,6vw,76px)}
.accuracy-guide h3{margin:0 0 12px;font-size:29px;line-height:1.15;text-wrap:balance}
.accuracy-guide>p{color:var(--muted)}
.accuracy-guide .counterweight{margin:20px 0 0;padding-top:16px;border-top:1px solid var(--line);color:var(--ink);font-size:15px}
.measure-picker{display:grid;grid-template-columns:repeat(2,1fr);grid-column:2;margin-bottom:18px}
.measure-picker button{appearance:none;position:relative;padding:14px 15px 17px;border:0;border-bottom:1px solid oklch(75% .06 282);background:transparent;color:var(--muted);text-align:left;cursor:pointer}
.measure-picker button:after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:3px;background:transparent}
.measure-picker button.on{color:var(--violet-dark)}
.measure-picker button.on:after{background:var(--violet)}
.measure-picker strong{display:block;font-family:var(--display);font-size:15px;line-height:1.3}
.measure-picker small{display:block;margin-top:5px;font-size:12px;line-height:1.35}
.measure-answer{grid-column:2}
@media (min-width:1100px){.measure-picker{grid-template-columns:repeat(4,1fr)}}
.explainer{min-height:55px;margin:0 0 18px;color:var(--ink);font-size:16px}
.scroll{overflow-x:auto}
table{width:100%;border-collapse:collapse;background:var(--surface);font-size:14px}
th,td{text-align:left;padding:13px 15px;border-bottom:1px solid var(--line);vertical-align:middle}
th{color:var(--muted);font-size:11px;font-weight:760;letter-spacing:.045em;text-transform:uppercase}
tr:last-child td{border-bottom:0}
.meter{display:flex;align-items:center;gap:9px;min-width:130px}
.meter i{display:block;flex:1;height:8px;border-radius:99px;background:var(--line);overflow:hidden}
.meter i u{display:block;height:100%;background:var(--violet)}
.meter span{width:46px;text-align:right;font-variant-numeric:tabular-nums}
.check{display:flex;align-items:flex-start;gap:9px;font-weight:450}
.check input{margin-top:5px;accent-color:var(--violet)}
.check.inline{display:inline-flex;margin:15px 0 0;font-size:14px}
.muted{color:var(--muted);font-size:13px}
.run-details{margin:30px 0 0 auto;max-width:calc(100% - 366px);color:var(--muted);font-size:14px}
.run-details summary{color:var(--ink);font-weight:720;cursor:pointer}

.toggle{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 22px}
.toggle button{appearance:none;padding:8px 13px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);font-size:14px;cursor:pointer}
.toggle button.on{background:var(--ink);border-color:var(--ink);color:var(--surface)}
.explorer{display:grid;grid-template-columns:310px minmax(0,1fr);gap:18px;align-items:start}
.case-list{list-style:none;margin:0;padding:0;max-height:760px;overflow:auto;background:var(--surface);border:1px solid var(--line);border-radius:12px}
.case-list li{padding:12px 14px;border-bottom:1px solid var(--line);cursor:pointer;font-size:14px}
.case-list li:last-child{border-bottom:0}
.case-list li:hover{background:var(--paper)}
.case-list li.on{background:var(--violet-soft);box-shadow:inset 3px 0 0 var(--violet)}
.case-list .f{display:block;margin-top:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.case{min-width:0;padding:clamp(18px,3vw,30px);background:var(--surface);border:1px solid var(--line);border-radius:12px}
.case h3{margin:25px 0 7px;color:var(--muted);font:760 11px/1.2 var(--body);letter-spacing:.07em;text-transform:uppercase}
.case h3:first-of-type{margin-top:20px}
.pill{display:inline-block;margin:0 6px 5px 0;padding:4px 9px;border-radius:6px;font-size:12px;font-weight:740}
.pill.good{background:var(--goodbg);color:oklch(40% .12 151)}
.pill.bad{background:var(--badbg);color:oklch(47% .16 29)}
.pill.open{background:var(--openbg);color:oklch(45% .11 76)}
.pill.plain{border:1px solid var(--line);color:var(--muted)}
.excerpt{max-height:240px;overflow:auto;padding:15px;background:var(--paper);border:1px solid var(--line);border-radius:8px;white-space:pre-wrap;font-size:14px}
mark{padding:1px 3px;border-radius:3px;background:oklch(88% .13 90);color:var(--ink)}
.pair{display:grid;grid-template-columns:1fr 1fr;gap:13px}
.box{height:100%;padding:14px;border:1px solid var(--line);border-radius:8px}
.box code{font-size:21px;font-weight:780}
code{font-family:"Noto Sans Mono","SFMono-Regular",Consolas,monospace}
ol.path{margin:0;padding-left:20px;font-size:14px}
ul.plain{margin:0;padding-left:18px;font-size:14px}

form{max-width:78ch}
label{display:block;margin:0 0 6px;font-size:14px;font-weight:700}
input:not([type=checkbox]),textarea{width:100%;margin-top:5px;padding:12px 13px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink);font-weight:450}
textarea{resize:vertical}
input:not([type=checkbox]):focus,textarea:focus{border-color:var(--violet);outline:3px solid oklch(49% .19 282 / .14)}
.row{display:flex;align-items:center;gap:14px;margin-top:16px;flex-wrap:wrap}
button[disabled]{opacity:.6;cursor:wait;transform:none!important}
.error{color:oklch(46% .18 29)}
.ok{color:oklch(42% .13 151)}

.contact-band{padding-block:clamp(76px,10vw,130px);background:var(--violet-dark);color:var(--surface)}
.contact-layout{display:grid;grid-template-columns:minmax(280px,.75fr) minmax(0,1.25fr);gap:clamp(48px,9vw,120px);align-items:start}
.contact-band .eyebrow{color:oklch(82% .1 80)}
.contact-band h2{max-width:11ch}
.contact-band p{color:oklch(86% .035 285);font-size:18px}
.contact-form{display:grid;grid-template-columns:1fr 1fr;gap:15px 18px;max-width:none}
.contact-form label{color:oklch(91% .025 286)}
.contact-form label>span{color:oklch(75% .035 286);font-weight:450}
.contact-form input:not([type=checkbox]),.contact-form textarea{border-color:oklch(65% .07 284 / .55);background:oklch(38% .11 280);color:var(--surface)}
.wide{grid-column:1/-1}
.hp{position:absolute;left:-9999px}

.disclosures{padding-bottom:76px}
.disclosure-list{border-top:1px solid var(--line)}
.disclosure-list details{border-bottom:1px solid var(--line)}
.disclosure-list summary{position:relative;padding:22px 42px 22px 0;font:700 18px/1.4 var(--display);cursor:pointer;list-style:none}
.disclosure-list summary::-webkit-details-marker{display:none}
.disclosure-list summary:after{content:"+";position:absolute;right:4px;top:18px;color:var(--violet);font-size:25px;font-weight:400}
.disclosure-list details[open] summary:after{content:"−"}
.disclosure-list details p{margin:0 0 18px;color:var(--muted)}
.foot{padding-block:28px 50px;border-top:1px solid var(--line);color:var(--muted);font-size:12px}
.foot p{margin:7px 0}
.foot a{color:inherit}

@media (max-width:900px){
  nav a:not(.nav-cta){display:none}
  .hero{grid-template-columns:1fr;min-height:auto}
  .hero-copy{padding-top:12px}
  .hero-flow{min-height:500px}
  .split-head{grid-template-columns:1fr;gap:22px;align-items:start}
  .code-story{grid-template-columns:1fr}
  .semantic-examples li{grid-template-columns:42px minmax(0,1fr)}
  .semantic-result{grid-column:2;padding:0}
  .semantic-result:before{display:none}
  .outcome-panel{grid-template-columns:1fr}
  .accuracy-detail{grid-template-columns:1fr}
  .measure-picker,.measure-answer{grid-column:1}
  .run-details{max-width:none}
  .explorer{grid-template-columns:1fr}
  .case-list{max-height:260px}
  .contact-layout{grid-template-columns:1fr}
}

@media (max-width:640px){
  .wrap{width:min(100% - 28px,1180px)}
  .bar{min-height:62px}
  .brand-mark{width:30px;height:30px}
  .tag{display:none}
  nav{gap:0}
  nav .nav-cta{padding:8px 11px;font-size:12px}
  h1{font-size:clamp(2.75rem,14vw,4.35rem)}
  h2{font-size:clamp(2rem,10vw,3.2rem)}
  .hero{padding-block:52px 72px}
  .hero-flow{min-height:470px;padding:28px 24px;border-radius:20px}
  .flow-source blockquote{font-size:27px}
  .semantic-examples li{grid-template-columns:32px minmax(0,1fr);gap:14px}
  .semantic-source blockquote{font-size:21px}
  .method li{grid-template-columns:48px 1fr;gap:15px}
  .code-story{margin-inline:-4px;padding:25px 20px;border-radius:18px}
  ol.anatomy li{grid-template-columns:34px 1fr;gap:12px}
  ol.anatomy:before{left:16px}
  .anatomy-marker{width:34px;height:34px}
  ol.anatomy .step{grid-column:2;padding-top:0}
  ol.anatomy .val{grid-column:2;padding-top:0}
  .anatomy-cap{margin-left:46px}
  .outcome-panel{padding:25px 20px}
  .legend li{grid-template-columns:12px 58px 1fr}
  .legend .muted{grid-column:2/-1}
  .measure-picker{grid-template-columns:1fr}
  .measure-picker button:after{top:0;bottom:0;left:0;right:auto;width:3px;height:auto}
  #levels th:nth-child(2),#levels td:nth-child(2){display:none}
  th,td{padding:11px 9px}
  .meter{min-width:94px}
  .pair{grid-template-columns:1fr}
  .case{padding:16px 13px}
  .contact-form{grid-template-columns:1fr}
  .wide{grid-column:auto}
}