@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--paper:#f6f8fb;--white:#fff;--ink:#17202e;--muted:#536071;--blue:#294ee9;--blue-dark:#203ec5;--orange:#c95525;--line:#dce2ea;--mono:ui-monospace,SFMono-Regular,Consolas,monospace;--sans:'DM Sans',Arial,sans-serif;--display:'Manrope',Arial,sans-serif}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:1rem;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
a,button{touch-action:manipulation}
button,a,input,summary{-webkit-tap-highlight-color:transparent}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--orange);outline-offset:5px}
::selection{background:#dce3ff}
h1,h2,h3,p{margin-top:0}
h1,h2,h3{font-family:var(--display)}
h2{font-size:clamp(1.6rem,2.5vw,2.2rem);line-height:1.2;font-weight:600;letter-spacing:-.04em;margin-bottom:16px}
h3{font-size:1.125rem;line-height:1.4;font-weight:600;letter-spacing:-.025em;margin-bottom:9px}
.wrap{width:min(1120px,calc(100% - 80px));margin-inline:auto}
.header{display:flex;justify-content:space-between;align-items:center;min-height:90px;border-bottom:1px solid var(--line);gap:24px}
.identity{display:flex;align-items:center;gap:12px;font-family:var(--display);font-size:1rem;font-weight:800;line-height:1.3;letter-spacing:-.025em}
.monogram{display:block;width:72px;height:68px;flex-shrink:0;object-fit:contain}
.identity-sub{display:block;margin-top:4px;color:var(--muted);font-family:var(--sans);font-size:.8125rem;font-weight:400;letter-spacing:0}
nav{display:flex;gap:25px;align-items:center;font-size:.875rem;font-weight:500}
nav a{padding-block:10px}
nav a:hover,.text-link:hover{color:var(--blue)}
.nav-contact{border:1px solid #b8c2d1;padding:8px 17px;border-radius:3px}
.eyebrow{font-family:var(--mono);font-size:.75rem;line-height:1.6;font-weight:500;letter-spacing:.055em;margin:0 0 16px}
.hero{display:grid;grid-template-columns:1.2fr 1fr;gap:8%;padding-block:44px;align-items:center}
h1{font-size:clamp(2.5rem,4.1vw,3.7rem);line-height:1.1;letter-spacing:-.05em;font-weight:600;margin-bottom:21px}
h1 span{color:var(--blue)}
.hero-description{color:var(--muted);font-size:1.0625rem;line-height:1.65;margin-bottom:23px;max-width:520px}
.hero-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 20px;font-size:.875rem;font-weight:600;border-radius:3px;line-height:1.4;transition:background .15s}
.primary{color:#fff;background:var(--blue)}
.primary:hover{background:var(--blue-dark)}
.text-link{font-size:.875rem;font-weight:500;text-decoration:underline;text-underline-offset:4px;text-decoration-color:#a7b3c4;line-height:1.5}
.hero-meta{margin:17px 0 0;font-size:.8125rem;color:var(--muted)}
.problem-panel>.eyebrow{color:var(--muted);margin-bottom:13px}
.problem-panel article{display:grid;grid-template-columns:23px 1fr;gap:12px;padding-block:15px;border-top:1px solid var(--line)}
.problem-panel article:last-child{padding-bottom:0}
.problem-number{color:var(--blue);font-family:var(--mono);font-size:.8125rem;padding-top:2px}
.problem-panel h2{font-size:1.125rem;line-height:1.4;letter-spacing:-.025em;margin-bottom:4px}
.problem-panel p{color:var(--muted);font-size:.9375rem;line-height:1.55;margin:0}
.subject-list{padding-left:17px;margin:8px 0 0;color:var(--muted);font-size:.9375rem;line-height:1.55}
.subject-list li{padding-left:2px;margin-top:5px}
.subject-list li::marker{color:var(--blue)}
.academic-reading{margin-top:7px}
.academic-reading summary{font-size:.8125rem;font-weight:400;color:var(--blue)}
.academic-reading .text-link{display:block;font-size:.8125rem;margin-block:8px}
.credentials-section{background:#eaf0f7;border-top:1px solid var(--line)}
.credentials-grid{display:flex;justify-content:space-between;align-items:center;gap:22px;padding-block:20px}
.credentials-grid p{margin:0;color:var(--muted);font-size:.8125rem;line-height:1.65}
.credentials-grid .academic-degrees{font-size:.9375rem;font-weight:500;color:var(--blue)}
.credentials-bio{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:center;padding-bottom:22px}
.credentials-bio p{font-size:.9375rem;color:var(--muted);line-height:1.65;max-width:850px;margin:0}
.section{padding-block:40px}
.help-section{background:var(--white);border-top:1px solid var(--line)}
.help-heading{display:grid;grid-template-columns:1fr 1fr;gap:7%;align-items:center;margin-bottom:20px}
.help-heading h2{margin:0}
.help-heading>p{margin:0;color:var(--muted);font-size:.9375rem;max-width:480px}
.help-grid{display:grid;grid-template-columns:1fr 1fr;gap:7%}
.help-grid article{border-top:1px solid var(--line);padding-top:15px;min-width:0}
.help-grid p{color:var(--muted);font-size:.9375rem;line-height:1.65;margin:0;max-width:480px}
.case-section{background:#233fd1;color:#fff}
.case-topline{display:flex;justify-content:space-between;gap:20px;align-items:center;margin-bottom:22px}
.case-topline .eyebrow{margin:0;color:#cbd5ff}
.case-tag{font-family:var(--mono);font-size:.75rem;border:1px solid #7890ef;border-radius:3px;padding:5px 9px;color:#dce3ff}
.case-grid{display:grid;grid-template-columns:1.6fr 1fr;gap:7%;align-items:start}
.case-lead,.case-observation{font-size:1rem;color:#e1e7ff;line-height:1.65;margin-bottom:14px;max-width:630px}
.case-section .text-link{color:inherit;text-decoration-color:#b4c2ff}
.case-section .text-link:hover{color:white;text-decoration-color:white}
.case-evidence{background:#f6f8ff;color:var(--ink);padding:23px;border-radius:4px;min-width:0}
.case-numbers{display:grid;grid-template-columns:1fr 1fr;gap:14px 18px;margin:0 0 15px}
.case-numbers>div:last-child{grid-column:1/-1}
.case-numbers dt{font-family:var(--display);font-size:2rem;line-height:1.15;letter-spacing:-.035em;color:var(--blue);margin-bottom:3px}
.case-numbers dd{margin:0;font-size:.8125rem;color:var(--muted)}
.micro{font-size:.75rem;color:var(--muted);line-height:1.6;margin:0}
summary{cursor:pointer;width:fit-content;padding-block:9px;min-height:40px;font-size:.875rem;font-weight:500;list-style-position:inside}
summary:hover{text-decoration:underline;text-underline-offset:4px}
.case-details{border-top:1px solid #7087e8;margin-top:22px;padding-top:7px}
.case-details summary{color:#e1e7ff}
.detail-content{padding-top:12px;max-width:800px;font-size:.9375rem;color:#e1e7ff}
.detail-content p{margin-bottom:13px}
.publication-link{display:block;margin-block:12px;text-decoration:underline;text-underline-offset:4px;font-size:.875rem}
.demo-heading{display:grid;grid-template-columns:1.2fr 1fr;gap:8%;align-items:end;margin-bottom:16px}
.demo-heading h2{margin:0}
.demo-heading>p{margin:0;color:var(--muted);font-size:.9375rem;max-width:470px}
.demo-lab>summary{color:var(--blue)}
.demo-lab-content{padding-top:16px}
.demo-presets{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-bottom:16px}
.demo-presets>span{color:var(--muted);font-size:.8125rem;margin-right:7px}
.demo-presets button{border:1px solid #bac5d5;background:transparent;color:var(--ink);border-radius:3px;padding:8px 12px;min-height:42px;cursor:pointer;font-size:.8125rem}
.demo-presets button:hover{border-color:var(--blue);color:var(--blue)}
.demo-presets button[aria-pressed=true]{background:var(--blue);color:white}
.experiment{display:grid;grid-template-columns:1.6fr 1fr;border:1px solid var(--line);border-radius:4px;background:var(--white);overflow:hidden}
.experiment-plot{padding:23px;min-width:0}
.plot-heading{display:flex;justify-content:space-between;align-items:center;gap:10px}
.plot-heading .eyebrow{margin:0;font-size:.6875rem;letter-spacing:.035em}
.figure-no{color:#758297;font-family:var(--mono);font-size:.6875rem;white-space:nowrap}
canvas{display:block;width:100%;height:100%}
#class-chart{height:260px;margin-block:15px 10px}
.chart-legend{display:flex;align-items:center;flex-wrap:wrap;gap:16px;font-size:.75rem;color:var(--muted);line-height:1.6;margin-top:10px}
.chart-legend>span{display:flex;align-items:center;gap:7px}
.key{display:inline-block;width:14px;height:2px;background:var(--blue)}
.key.class-b{background:var(--orange)}
.key.threshold{background:#69778b}
.key.observed{width:5px;height:5px;border-radius:50%;background:#6d7c91}
.key.band{height:8px;background:#d6defb}
.experiment-plot .micro{margin-top:12px}
.experiment-controls{padding:23px;border-left:1px solid var(--line);background:#f1f5fa}
.control+.control{margin-top:18px}
.control-label{display:flex;justify-content:space-between;align-items:center;gap:15px;font-size:.875rem;font-weight:600;margin-bottom:8px}
output{font-family:var(--mono);color:var(--blue);font-weight:400;font-size:.875rem}
input[type=range]{width:100%;margin:5px 0 8px;accent-color:var(--blue);cursor:pointer;height:22px}
.control p{font-size:.8125rem;color:var(--muted);line-height:1.5;margin:0}
.error-result{border-top:1px solid var(--line);margin-top:18px;padding-top:15px}
.error-result>span{display:block;font-size:.875rem;color:var(--muted)}
.error-result>strong{font-family:var(--display);font-size:2.6rem;line-height:1.25;letter-spacing:-.045em;color:var(--blue);font-weight:500;display:block;margin-block:2px 9px}
.class-errors{display:flex;gap:20px;font-size:.8125rem;color:var(--muted);flex-wrap:wrap}
.class-errors b{font-family:var(--mono);color:var(--ink);margin-left:6px;font-weight:400}
.result-boundary{font-size:.75rem;color:var(--muted);line-height:1.6;margin:12px 0 0}
.reset-button{border:0;border-bottom:1px solid #a7b3c4;background:none;padding:5px 0;color:var(--muted);font-size:.8125rem;cursor:pointer;margin-top:13px}
.reset-button:hover{color:var(--blue)}
.demo-interpretation{display:grid;grid-template-columns:1fr 1fr;gap:6%;padding-block:20px;border-bottom:1px solid var(--line)}
.demo-interpretation .eyebrow{color:var(--blue);margin-bottom:7px}
.demo-interpretation p{font-size:.9375rem;line-height:1.65;margin-bottom:0}
.demo-counterfactual{font-size:.8125rem!important;color:var(--muted);margin-top:10px}
.model-details,.signal-details{font-size:.875rem;margin-top:12px;color:var(--muted)}
.model-detail-content{padding-top:12px;max-width:900px;line-height:1.75}
.model-detail-content p{margin-bottom:12px}
.model-detail-content strong{font-weight:500;color:var(--ink)}
.signal-example{display:grid;grid-template-columns:1.3fr 1fr;gap:6%;align-items:center;padding-top:16px}
.hero-chart{height:250px;margin-top:16px}
.signal-example h3{color:var(--ink)}
.interests-section{background:#edf1f7;border-block:1px solid var(--line)}
.interest-projects{display:grid;grid-template-columns:1fr 1fr;gap:7%;margin-top:20px}
.interest-project{border-top:1px solid #ccd5e2;padding-top:15px;min-width:0}
.interest-project>p{color:var(--muted);font-size:.9375rem;line-height:1.65;margin-bottom:12px;max-width:480px}
.contact-section{padding-block:40px}
.contact-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:10%;align-items:center}
.contact-grid h2{margin-bottom:14px}
.contact-grid>div>p{max-width:540px;color:var(--muted);font-size:.9375rem;margin-bottom:0}
.contact-grid .contact-note{font-size:.8125rem;margin-top:13px}
.contact-actions{display:flex;flex-direction:column;align-items:flex-start;gap:16px}
.contact-button{min-width:210px}
.footer{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;border-top:1px solid var(--line);padding-block:18px;font-size:.75rem;color:var(--muted)}
.business-details summary{padding-top:0;min-height:26px;font-size:.75rem}
.business-details p{font-size:.75rem;line-height:1.8;margin:8px 0 0}
.business-details .text-link{font-size:.75rem}
.skip-link{position:absolute;top:-80px;left:20px;background:var(--blue);color:#fff;padding:10px 15px;z-index:10}
.skip-link:focus{top:15px}
.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}
@media(max-width:820px){
  .wrap{width:calc(100% - 48px)}
  .hero{gap:5%;grid-template-columns:1.15fr 1fr;padding-block:32px}
  h1{font-size:2.5rem}
  .hero-description{font-size:1rem}
  .problem-panel h2{font-size:1rem}
  .problem-panel p{font-size:.875rem}
  .credentials-grid{flex-wrap:wrap;gap:12px 22px}
  .credentials-grid .academic-degrees{width:100%}
  .case-grid{grid-template-columns:1.3fr 1fr;gap:5%}
  .case-evidence{padding:18px}
  .case-numbers dt{font-size:1.75rem}
  .experiment{grid-template-columns:1fr}
  .experiment-controls{border-left:0;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:20px}
  .control+.control{margin-top:0}
  .error-result{grid-column:1/-1;margin-top:0}
  .reset-button{margin:0;width:fit-content}
  .signal-example{grid-template-columns:1fr;gap:20px}
}
@media(max-width:600px){
  .wrap{width:calc(100% - 36px)}
  .header{min-height:80px;gap:12px;flex-wrap:wrap;padding-block:14px}
  .identity{font-size:.875rem;gap:9px}
  .monogram{width:60px;height:57px}
  .identity-sub{font-size:.75rem}
  nav{gap:13px;font-size:.8125rem;flex-wrap:wrap}
  .nav-contact{padding:7px 11px}
  .hero{grid-template-columns:1fr;gap:28px;padding-block:30px}
  h1{font-size:clamp(2.1rem,8.6vw,3rem);max-width:490px}
  .hero-actions{gap:17px}
  .problem-panel article{padding-block:12px}
  .problem-panel h2{font-size:1.0625rem}
  .problem-panel p{font-size:.9375rem}
  .credentials-grid{display:grid;gap:10px;padding-block:18px}
  .credentials-bio{grid-template-columns:1fr;gap:12px;padding-bottom:20px}
  .section,.contact-section{padding-block:30px}
  .case-grid{grid-template-columns:1fr;gap:20px}
  .case-numbers{grid-template-columns:1fr 1fr 1.3fr;gap:10px}
  .case-numbers>div:last-child{grid-column:auto}
  .case-numbers dt{font-size:1.7rem}
  .case-numbers dd{font-size:.75rem}
  .case-topline{gap:12px;flex-wrap:wrap;margin-bottom:18px}
  .demo-heading{grid-template-columns:1fr;gap:12px}
  .help-heading{grid-template-columns:1fr;gap:12px;margin-bottom:20px}
  .help-grid{grid-template-columns:1fr;gap:22px}
  .interest-projects{grid-template-columns:1fr;gap:22px}
  .contact-grid{grid-template-columns:1fr;gap:22px}
  .contact-actions{flex-direction:row;flex-wrap:wrap;align-items:center}
  .experiment-plot{padding:18px 14px}
  #class-chart{height:235px}
  .experiment-controls{grid-template-columns:1fr;padding:20px;gap:19px}
  .error-result{grid-column:auto}
  .demo-interpretation{grid-template-columns:1fr;gap:18px}
  .demo-presets>span{width:100%}
  .footer{flex-wrap:wrap;gap:10px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}}