:root{--bg:#fff;--panel:#F4F8FC;--panel-2:#EBF2FA;--ink:#0A1626;--muted:#45566E;--faint:#576A83;--line:#D7E2EF;--accent:#0A66C2;--sans:'Space Grotesk',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--mono:'JetBrains Mono',Menlo,monospace;--pad:clamp(28px,5.5vw,96px);--ease:cubic-bezier(.22,1,.36,1)}
*{box-sizing:border-box}html,body{margin:0;height:100%}body{overflow:hidden;font-family:var(--sans);color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}a{color:var(--accent);text-underline-offset:.2em}a:hover{text-decoration-thickness:2px}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:5px}button:disabled{opacity:.38;cursor:default}p,h1,h2,h3,figure{margin:0}h1,h2,h3{text-wrap:balance}p,li{text-wrap:pretty}strong{font-weight:600}.a{color:var(--accent)}
.deck{height:100dvh;overflow:hidden}.slide{display:none;height:100%;padding:90px var(--pad) 100px;overflow-y:auto;overscroll-behavior:contain}.slide.active{display:flex;align-items:safe center}.content{width:100%;max-width:1280px;margin:auto}.slide.active .content{animation:arrive .24s var(--ease)}@keyframes arrive{from{transform:translateY(8px)}to{transform:none}}
h1{font-size:clamp(42px,5.15vw,78px);line-height:1.06;letter-spacing:-.035em;max-width:23ch}h2{font-size:clamp(23px,2.3vw,36px);line-height:1.2;letter-spacing:-.02em}.lead{font-size:clamp(21px,2vw,30px);line-height:1.45;max-width:53ch;margin-top:28px;color:var(--muted)}.lead strong{color:var(--ink)}.takeaway{font-size:clamp(21px,1.9vw,29px);line-height:1.4;margin-top:32px;max-width:58ch}.takeaway strong{color:var(--accent)}.fine{font-size:clamp(15px,1.2vw,19px);line-height:1.5;color:var(--muted)}.cite{margin-top:24px;font-size:clamp(14px,1.05vw,17px);line-height:1.5;color:var(--muted)}.cite a{color:inherit}.label{font:500 14px/1.4 var(--mono);color:var(--muted)}
.chrome{position:fixed;left:var(--pad);right:var(--pad);z-index:5;display:flex;justify-content:space-between;align-items:center;gap:20px}.top{top:28px;padding-bottom:14px;border-bottom:1px solid var(--line);font:500 12px/1.4 var(--mono);letter-spacing:.07em;color:var(--muted)}.top::before{content:"";position:absolute;inset:-30px calc(-1 * var(--pad)) -8px;z-index:-1;background:var(--bg)}.bottom::before{content:"";position:absolute;inset:-8px calc(-1 * var(--pad)) -20px;z-index:-1;background:var(--bg)}.brand{display:flex;align-items:center;gap:10px}.brand::before{content:'';width:7px;height:7px;background:var(--accent)}.bottom{bottom:20px;pointer-events:none}.byline{font-size:13px;color:var(--muted)}.nav{display:flex;align-items:center;gap:6px;pointer-events:auto;padding:5px;background:var(--bg);border:1px solid var(--line);border-radius:10px}.nav button{border:0;background:transparent;min-width:44px;min-height:44px;border-radius:5px;color:var(--ink);font-size:20px}.nav button:hover:not(:disabled){background:var(--panel-2)}.nav .index{font:500 13px var(--mono);min-width:90px;color:var(--accent)}.nav .notes-toggle{font-size:13px;min-width:60px}.rail{position:fixed;bottom:0;left:0;right:0;height:3px;background:var(--line);z-index:6;pointer-events:none}.rail span{display:block;width:100%;height:100%;background:var(--accent);transform-origin:left;transform:scaleX(0)}.sr-only{position:absolute;top:0;left:0;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
.cover h1{font-size:clamp(54px,7vw,106px);max-width:16ch;line-height:1.02}.cover .sub{font-size:clamp(23px,2.55vw,38px);line-height:1.3;margin-top:28px;color:var(--muted)}.meta{display:flex;flex-wrap:wrap;gap:12px 30px;margin-top:50px;font-size:18px;color:var(--muted)}.meta b{color:var(--ink)}.start-help{margin-top:36px;font-size:14px;color:var(--muted)}
.intro .content{display:grid;grid-template-columns:.8fr 1.3fr;gap:64px;align-items:center}.photo{border-radius:12px;overflow:hidden}.photo img{display:block;width:100%;height:auto;aspect-ratio:4/4.6;object-fit:cover;object-position:50% 22%}.intro h1{max-width:12ch}.intro .lead{font-size:24px;margin-top:22px}.credentials{margin:28px 0 0;padding:0;list-style:none}.credentials li{border-top:1px solid var(--line);padding:14px 0;font-size:20px;line-height:1.35}.credentials small{display:block;color:var(--muted);font-size:16px;margin-top:3px}
.cold .content{text-align:center}.cold h1{margin:auto;font-size:clamp(30px,3vw,46px)}.bigtime{font-size:clamp(80px,12vw,176px);line-height:1;margin:28px 0 36px;letter-spacing:-.05em}.bigtime span{font-size:.35em;color:var(--muted);letter-spacing:0}.versus{max-width:960px;margin:auto;display:grid;grid-template-columns:1fr auto 1fr;gap:32px;align-items:center}.vcol{text-align:left;border-top:1px solid var(--line);padding-top:20px}.vcol h2{font-size:24px}.vcol p{font-size:21px;margin-top:14px;color:var(--muted)}.vcol:first-child h2{color:var(--accent)}.versus .vs{color:var(--muted)}.cold .takeaway{margin:36px auto 0}
.benchmark{display:grid;grid-template-columns:1.4fr 1fr;gap:64px;margin-top:34px;align-items:start}.benchmark h2{font-size:25px}.benchmark .fine{margin-top:9px}.bar-row{display:grid;grid-template-columns:1fr auto;gap:8px 24px;margin-top:24px;align-items:baseline}.bar-row span{font-size:20px}.bar-row strong{font-size:35px;line-height:1;color:var(--accent)}.bar-track{grid-column:1/-1;background:var(--panel-2);height:9px}.bar-track i{display:block;height:100%;width:var(--value);background:var(--accent)}.study-note{border-top:1px solid var(--line);padding-top:20px}.study-note .fig{font-size:54px;line-height:1.1;color:var(--accent);margin:16px 0 12px;letter-spacing:-.03em}.study-note p{font-size:20px;line-height:1.4}
.statement h1{font-size:clamp(46px,6.4vw,94px);max-width:20ch}.statement .lead{max-width:44ch}.route{margin-top:36px;list-style:none;padding:0;counter-reset:route}.route li{display:grid;grid-template-columns:50px 1fr auto;gap:24px;align-items:baseline;border-top:1px solid var(--line);padding:17px 0;counter-increment:route}.route li::before{content:'0' counter(route);font:500 20px var(--mono);color:var(--accent)}.route strong{font-size:29px}.route span{font-size:19px;color:var(--muted)}
.glossary{margin-top:36px;display:grid;grid-template-columns:1fr 1fr;gap:30px 64px}.glossary div{border-top:1px solid var(--line);padding-top:20px}.glossary dt{font-weight:600;font-size:29px}.glossary dd{margin:12px 0 0;font-size:23px;color:var(--muted);line-height:1.4;max-width:33ch}
.comparison{margin-top:36px;display:grid;grid-template-columns:1fr 1fr;gap:32px}.comparison article{border-top:1px solid var(--line);padding-top:22px}.comparison h2{font-size:26px;margin-bottom:16px}.comparison p{font-size:27px;line-height:1.4}.comparison .fine{font-size:17px;margin-top:14px}.mechanism{display:flex;align-items:center;gap:24px;margin-top:42px}.mechanism .step{flex:1;border-top:2px solid var(--line);padding-top:20px}.mechanism .step:last-child{border-color:var(--accent)}.mechanism h2{font-size:28px}.mechanism p{margin-top:10px;font-size:20px;color:var(--muted);line-height:1.4}.connector{color:var(--accent);font-size:28px}
.technique .content{display:grid;grid-template-columns:1fr 1.1fr;gap:64px;align-items:center}.technique h1{font-size:clamp(40px,4.5vw,68px);max-width:16ch}.technique .lead{font-size:clamp(22px,1.9vw,28px);max-width:33ch}.technique .takeaway{font-size:22px;max-width:34ch}.tech-count{display:inline-block;font:500 14px var(--mono);color:var(--accent);margin-bottom:22px}.example{min-width:0}.example>h2{font-size:23px;margin-bottom:18px}.sample{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:30px}.sample .label{display:block;margin-bottom:16px}.sample p{font-size:24px;line-height:1.45}.sample .source{display:block;margin-top:16px;font-size:16px;color:var(--muted)}.sample .separate{border-top:1px solid var(--line);padding-top:20px;margin-top:22px}.sample .fine{font-size:17px}.checkline{margin-top:18px;font-size:18px;line-height:1.45;color:var(--muted)}.checkline strong{color:var(--accent)}
.code{border:1px solid var(--line);border-radius:10px;overflow:hidden;background:var(--panel)}.code .bar{padding:14px 24px;border-bottom:1px solid var(--line);font:500 14px var(--mono);color:var(--muted)}pre{margin:0;padding:24px;white-space:pre-wrap;overflow-wrap:anywhere;font:400 clamp(17px,1.4vw,21px)/1.7 var(--mono);tab-size:2}.k{color:var(--accent)}.s{color:#086957}.code-note{padding:17px 24px;border-top:1px solid var(--line);font-size:17px;line-height:1.5;color:var(--muted)}
.flow{list-style:none;padding:0;margin:0}.flow li{position:relative;padding:0 0 30px 52px}.flow li:last-child{padding-bottom:0}.flow .num{position:absolute;left:0;top:1px;font:500 19px var(--mono);color:var(--accent)}.flow h2{font-size:28px}.flow p{font-size:20px;line-height:1.4;color:var(--muted);margin-top:9px}.flow .cause{font:400 14px var(--mono);color:var(--accent);margin:14px 0 0}.flow .last .num{top:25px}.flow .last{padding-top:24px;border-top:1px solid var(--line)}
.venn-mobile{display:none}.trifecta .content{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:60px}.trifecta h1{font-size:clamp(40px,4.6vw,70px);max-width:16ch}.trifecta .lead{font-size:25px;max-width:33ch}.venn{width:100%;max-width:550px;margin:auto}.venn text{font-family:var(--sans);fill:var(--ink);font-size:21px;font-weight:500}.venn .small{font-size:15px;font-weight:400;fill:var(--muted)}.venn .center{fill:#fff;font:500 15px var(--sans)}
.checklist{list-style:none;padding:0;margin:32px 0 0;counter-reset:check}.checklist li{display:flex;align-items:baseline;gap:24px;border-top:1px solid var(--line);padding:16px 0;font-size:clamp(22px,2vw,29px);line-height:1.35;counter-increment:check}.checklist li::before{content:'0' counter(check);font:500 18px var(--mono);color:var(--accent)}.frena{margin:28px 0 0}.frena>div{display:grid;grid-template-columns:220px 1fr;gap:28px;border-top:1px solid var(--line);padding:17px 0;align-items:baseline}.frena dt{font-size:25px;font-weight:600;display:flex;gap:20px;align-items:baseline}.frena dt b{font:600 28px var(--mono);color:var(--accent);width:24px}.frena dd{margin:0;font-size:24px;color:var(--muted);line-height:1.35}.quote blockquote{margin:0;max-width:25ch;font-size:clamp(37px,4.6vw,68px);line-height:1.18;font-weight:600;letter-spacing:-.03em}.quote .attribution{font-size:18px;color:var(--muted);margin-top:28px}.url{display:inline-flex;align-items:center;gap:16px;margin-top:34px;font-size:26px;line-height:1.3;padding:12px 0;overflow-wrap:anywhere;min-height:44px}
.sources h1{font-size:58px}.source-list{list-style:none;margin:28px 0 0;padding:0}.source-list li{border-top:1px solid var(--line);padding:13px 0;display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:baseline;font-size:20px;line-height:1.4}.source-list span{color:var(--muted);font-size:18px}.source-list a{font-weight:500}.close .content{display:grid;grid-template-columns:1fr auto;gap:60px;align-items:center}.close h1{font-size:clamp(42px,5.2vw,78px);max-width:16ch}.connect{text-align:center;max-width:290px}.qrcard{display:block;padding:18px;background:#fff;border:1px solid var(--line);border-radius:10px}.qrcard img{display:block;width:240px;max-width:100%;height:auto}.connect p{font-size:21px;margin-top:20px;font-weight:500}.connect .fine{font-size:16px;font-weight:400;margin-top:10px}.connect>a:last-child{display:inline-block;margin-top:12px;min-height:44px;padding:10px;font-size:16px}
dialog{border:1px solid var(--line);border-radius:12px;background:var(--bg);color:var(--ink);width:min(900px,calc(100% - 32px));max-height:85dvh;padding:30px;box-shadow:0 24px 80px #0A162630}dialog::backdrop{background:#0A162660}.dialog-head{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:24px}.dialog-head h2{font-size:28px}.dismiss{min-height:44px;min-width:70px;padding:8px 14px;border:1px solid var(--line);background:var(--panel);border-radius:5px;color:var(--ink)}.toc-list{display:grid;grid-template-columns:1fr 1fr;gap:8px;list-style:none;margin:0;padding:0}.toc-list button{width:100%;height:100%;display:flex;gap:14px;text-align:left;font-size:17px;line-height:1.35;padding:14px;border:1px solid var(--line);border-radius:5px;background:var(--bg);color:var(--ink)}.toc-list button:hover,.toc-list button[aria-current=true]{background:var(--panel-2);border-color:var(--accent)}.toc-list span{font:500 13px var(--mono);color:var(--accent);padding-top:3px}.speaker-notes{font-size:23px;line-height:1.6;white-space:pre-line}.dialog-help{font-size:14px;color:var(--muted);margin-top:20px}
@media(min-width:901px) and (max-height:760px){.slide{padding-top:80px;padding-bottom:90px}h1{font-size:52px}.cover h1{font-size:76px}.statement h1{font-size:66px}.technique h1{font-size:48px}.lead,.technique .lead{font-size:22px;margin-top:20px}.takeaway{margin-top:22px}.route li,.checklist li,.frena>div{padding:11px 0}.intro .photo{max-height:440px}.intro .photo img{height:440px}.meta{margin-top:30px}.bigtime{font-size:120px;margin:18px 0 24px}.benchmark{gap:36px}.source-list li{padding:9px 0}.close h1{font-size:56px}}
@media(max-width:900px){.trifecta .venn{display:none}.venn-mobile{display:block}.venn-mobile h2{font-size:22px}.venn-mobile p{font-size:20px}.venn-mobile .takeaway{font-size:21px}:root{--pad:28px}.slide{padding-top:84px;padding-bottom:108px}.content{margin:auto}.top{top:20px;font-size:10px}.top .brand{font-size:0}.top .brand::after{content:'F13 · Data & AI';font-size:11px}.bottom{bottom:16px}.byline{font-size:11px;max-width:100px}.technique .content,.intro .content,.trifecta .content,.close .content{grid-template-columns:1fr;gap:32px}.technique h1,.trifecta h1{font-size:44px;max-width:20ch}.technique .lead,.trifecta .lead{max-width:48ch;font-size:22px}.tech-count{margin-bottom:14px}.technique .takeaway{font-size:20px;margin-top:20px;max-width:45ch}.intro .photo{width:190px}.intro .photo img{aspect-ratio:4/3.5}.intro .content{gap:24px}.intro .lead{font-size:21px}.intro .credentials{margin-top:22px}.intro .credentials li{font-size:18px;padding:12px 0}.intro h1{max-width:none}.benchmark{grid-template-columns:1fr;gap:28px}.glossary{gap:24px}.glossary dt{font-size:24px}.glossary dd{font-size:20px}.route li{grid-template-columns:32px 1fr;gap:5px 18px}.route strong{font-size:25px}.route span{grid-column:2;font-size:17px}.frena>div{grid-template-columns:180px 1fr;gap:12px}.frena dd{font-size:21px}.frena dt{font-size:22px}.comparison{gap:24px}.comparison p{font-size:23px}.versus{gap:20px}.vcol h2{font-size:22px}.vcol p{font-size:18px}.mechanism{gap:14px}.mechanism h2{font-size:23px}.mechanism p{font-size:18px}.close .connect{justify-self:start;display:grid;grid-template-columns:150px 1fr;column-gap:24px;text-align:left;max-width:100%;align-items:center}.connect .qrcard{grid-row:1/4;padding:10px}.connect p{margin:0;font-size:20px}.connect .fine{margin:0}.connect>a:last-child{margin:0;padding-left:0}.source-list li{grid-template-columns:1fr;gap:4px}.sources h1{font-size:46px}.source-list li{font-size:19px}.source-list span{font-size:17px}.venn{max-width:420px}.sample{padding:24px}.sample p{font-size:22px}}
@media(max-width:540px){:root{--pad:22px}.top{gap:12px}.top #section{max-width:190px;text-align:right}.bottom{left:16px;right:16px}.byline{max-width:88px}.nav{gap:0}.nav .index{min-width:76px}.nav .notes-toggle{min-width:52px}.cover h1{font-size:50px}.cover .sub{font-size:24px}.meta{display:grid;gap:8px;margin-top:32px;font-size:16px}.start-help{font-size:13px;max-width:28ch;line-height:1.5}.glossary{grid-template-columns:1fr;gap:22px}.glossary dd{margin-top:6px}.comparison{grid-template-columns:1fr}.frena>div{grid-template-columns:1fr;gap:8px;padding:15px 0}.frena dd{padding-left:44px;font-size:20px}.frena dt{gap:20px}.checklist li{font-size:21px;gap:16px}.mechanism{flex-direction:column;align-items:stretch;gap:16px}.mechanism .connector{display:none}.mechanism .step{padding-top:16px}.quote blockquote{font-size:35px}.quote .attribution{font-size:16px;line-height:1.5}.versus{grid-template-columns:1fr;gap:20px}.versus .vs{display:none}.vcol{padding-top:16px}.cold .content{text-align:left}.cold h1{font-size:32px}.bigtime{font-size:92px;margin:24px 0}.cold .takeaway{font-size:22px}.toc-list{grid-template-columns:1fr}dialog{padding:22px}.speaker-notes{font-size:20px}.close .connect{grid-template-columns:120px 1fr;gap:8px 18px}.connect p{font-size:18px}.connect .fine{font-size:14px}.url{font-size:22px}.bar-row span{font-size:18px}.bar-row strong{font-size:30px}.label{font-size:12px}.study-note .fig{font-size:44px}pre{font-size:16px;padding:18px}.code-note{font-size:16px;padding:16px 18px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media print{@page{size:1600px 900px;margin:0}html,body{height:auto;overflow:visible}.chrome,.rail,dialog,.start-help,.sr-only{display:none!important}.deck{height:auto;overflow:visible}.slide,.slide.active{display:flex!important;position:relative;width:1600px;height:900px;overflow:visible;padding:80px 100px;break-after:page;page-break-after:always}.slide:last-child{break-after:auto;page-break-after:auto}.content{max-width:1400px;animation:none!important}.slide::after{content:attr(data-page) ' / 22';position:absolute;bottom:30px;right:100px;font:14px var(--mono);color:var(--muted)}*{-webkit-print-color-adjust:exact;print-color-adjust:exact}a{color:inherit;text-decoration:none}.intro .photo{width:auto}.technique .content,.trifecta .content{grid-template-columns:1fr 1.1fr}.intro .content{grid-template-columns:.8fr 1.3fr}.close .content{grid-template-columns:1fr auto}.benchmark{grid-template-columns:1.4fr 1fr}.glossary{grid-template-columns:1fr 1fr}.source-list li{grid-template-columns:1fr 1fr}.frena>div{grid-template-columns:220px 1fr}.connect{display:block!important;text-align:center!important}.qrcard img{width:240px}.connect p{margin-top:20px!important}}

.start-help{display:none}.slide{padding-bottom:70px}@media(max-width:900px){.slide{padding-bottom:65px}}