@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/ibm-plex-mono-latin-400-normal-DMJ8VG8y.woff2) format("woff2"),url(/assets/ibm-plex-mono-latin-400-normal-CvHOgSBP.woff) format("woff")}@font-face{font-family:Newsreader Variable;font-style:normal;font-weight:200 800;font-display:swap;src:url(/assets/newsreader-latin-wght-normal-CCVVNp6i.woff2) format("woff2")}@font-face{font-family:Newsreader Variable;font-style:italic;font-weight:200 800;font-display:swap;src:url(/assets/newsreader-latin-wght-italic-Bxi8ein9.woff2) format("woff2")}:root{font-family:Arial,Helvetica,sans-serif;color:#19211e;background:#f4f5f2;font-synthesis:none;--paper: #f4f5f2;--ink: #19211e;--muted: #59615b;--rule: #c9cec7;--accent: #b73c23;--green: #355b49;--serif: "Newsreader Variable", Georgia, serif;--mono: "IBM Plex Mono", monospace;scroll-behavior:smooth;font-size:17px}*{box-sizing:border-box}body{margin:0}button,a{-webkit-tap-highlight-color:transparent}a{color:inherit;text-decoration-thickness:1px;text-underline-offset:5px}button{font:inherit;cursor:pointer;color:inherit}button:disabled{cursor:default}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:5px}button{border-radius:0}p{line-height:1.55}h1,h2,h3,p,figure{margin:0}h1,h2,h3{font-weight:450}h1,h2{font-family:var(--serif);letter-spacing:-.045em;line-height:1.02}h2{font-size:clamp(2.7rem,4.5vw,4.1rem)}h3{font-family:var(--serif);font-size:2rem;line-height:1.15;letter-spacing:-.025em}pre,code,.mono,.eyebrow{font-family:var(--mono);font-weight:400}pre{white-space:pre-wrap;overflow-wrap:anywhere}code{font-size:.85em}.eyebrow{font-size:max(12px,.67rem);letter-spacing:.1em;text-transform:uppercase;line-height:1.6}.mono{font-size:.7rem}.accent{color:var(--accent)}.support{color:var(--green)}.small{font-size:.78rem;color:var(--muted);line-height:1.65}.site-header,main,footer{max-width:1360px;margin:auto;padding-left:48px;padding-right:48px}.site-header{height:104px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--ink)}.wordmark{display:flex;align-items:center;gap:9px;font-size:1.45rem;letter-spacing:-.06em;font-weight:600;text-decoration:none}.mark{color:var(--accent);font-size:2.2rem;font-weight:400;line-height:1}.site-header nav{display:flex;gap:32px;font-size:.78rem}.site-header nav a{text-decoration:none}.site-header nav a:last-child{padding-bottom:5px;border-bottom:1px solid var(--ink)}.skip-link{position:absolute;top:-100px;left:16px;background:var(--ink);color:var(--paper);padding:16px;z-index:10}.skip-link:focus{top:12px}.hero{display:grid;grid-template-columns:1fr 1.06fr;gap:64px;padding:68px 0 64px;align-items:start}.hero-copy{padding-top:7px}.hero h1{font-size:clamp(3.8rem,6.2vw,5.5rem);margin:28px 0 24px;line-height:.96}.hero h1 em{font-weight:450;color:var(--accent)}.hero-intro{max-width:440px;font-size:1rem;line-height:1.65;color:var(--muted);margin-bottom:28px}.hero-intro strong{font-weight:400;color:var(--ink)}.button{display:inline-flex;align-items:center;justify-content:center;gap:24px;padding:15px 21px;border:1px solid var(--ink);background:transparent;text-decoration:none;font-size:.82rem;line-height:1.3;font-weight:500;transition:background .2s,color .2s}.button:hover,.primary{background:var(--ink);color:var(--paper)}.primary:hover{background:var(--green);border-color:var(--green)}.hero-secondary{display:block;margin-top:20px;font-size:.8rem;text-decoration:none}.hero-note{display:flex;flex-wrap:wrap;gap:10px 17px;margin-top:40px;color:var(--muted);font-size:max(12px,.61rem)}.hero-note span:before{content:"·";padding-right:8px}.experiment{border-top:2px solid var(--ink);background:#e9ece6;scroll-margin-top:20px}.instrument-top{display:flex;justify-content:space-between;padding:17px 20px;border-bottom:1px solid var(--rule);font-size:max(12px,.61rem)}.live-dot{display:inline-block;width:6px;height:6px;background:var(--green);margin-right:8px}.diverged .live-dot{background:var(--accent)}.claim-pair{display:grid;grid-template-columns:1fr 64px 1fr;padding:30px 24px 24px;align-items:center;gap:8px}.claim-pair>div:not(.relationship){min-width:0}.claim-pair .mono{font-size:.7rem}.claim-pair small{color:var(--muted);font-size:inherit}.claim-pair p{font-size:.77rem;margin:24px 0 0;color:var(--muted)}.claim-pair strong{font-family:var(--mono);font-weight:400;display:block;font-size:clamp(2rem,3.7vw,3.2rem);letter-spacing:-.07em;line-height:1.35}.claim-caption{font-size:max(12px,.63rem);color:var(--muted)}.relationship{display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-size:2.9rem;color:var(--green);padding-top:30px;gap:4px}.relationship span{height:1px;flex:1;background:currentColor}.diverged .relationship,.diverged .claim-pair>div:last-child strong{color:var(--accent)}.experiment-control{padding:0 24px 20px;display:flex;flex-direction:column;align-items:flex-start;gap:12px}.experiment-control .button{font-size:.75rem;padding:12px 17px;background:var(--paper)}.experiment-control .button:hover{background:var(--ink)}.experiment-control>.mono{font-size:max(12px,.6rem);color:var(--muted)}.finding{display:flex;gap:14px;padding:19px 24px;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);background:#dfe7dd;min-height:110px}.finding-symbol{font-size:1.4rem;color:var(--green)}.finding strong{font-size:.82rem;font-weight:600;color:var(--green)}.finding p{font-size:.74rem;margin-top:6px;color:#3d4a3f}.diverged .finding{background:#f0e3db}.diverged .finding-symbol,.diverged .finding strong{color:var(--accent)}.experiment-evidence{padding:16px 24px;border-bottom:1px solid var(--rule);font-size:.72rem}.experiment-evidence summary{cursor:pointer;display:flex;justify-content:space-between}.experiment-evidence .evidence-pair{margin:20px 0 0;grid-template-columns:1fr}.experiment-evidence .source{border-bottom:1px solid var(--rule);padding-bottom:15px}.replay{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:20px 24px 12px}.text-button{padding:0;border:0;background:transparent;text-decoration:underline;text-underline-offset:4px;font-size:.7rem;line-height:1.5;text-align:left}.replay .mono{font-size:max(12px,.57rem);max-width:150px;text-align:right}.steps{display:grid;grid-template-columns:repeat(4,1fr);list-style:none;margin:0 24px;padding:0;gap:8px}.steps li{border-top:2px solid #bec5bb}.steps li.current{border-color:var(--accent)}.steps button{display:block;text-align:left;width:100%;padding:10px 0 0;background:none;border:0;font-size:max(12px,.65rem)}.steps span{display:block;font-family:var(--mono);font-size:max(12px,.55rem);color:var(--muted);margin-bottom:4px}.stage-description{font-size:.72rem;margin:16px 24px 0;min-height:42px}.replay-note{font-size:max(12px,.62rem);line-height:1.6;margin:13px 24px 20px;color:var(--muted)}.artifact-strip{padding:25px 0;border-top:1px solid var(--ink);border-bottom:1px solid var(--rule);display:flex;flex-wrap:wrap;gap:22px;align-items:center;font-size:.74rem}.artifact-strip>.eyebrow{margin-right:auto;font-size:max(12px,.59rem);color:var(--muted)}.section{padding:92px 0;border-bottom:1px solid var(--rule);scroll-margin-top:32px}.section-heading{display:grid;grid-template-columns:1fr 1fr;column-gap:90px;align-items:end}.section-heading>.eyebrow{grid-column:1/-1;margin-bottom:24px}.section-heading>p:last-child{max-width:460px;color:var(--muted);font-size:.93rem}.claim-model{display:grid;grid-template-columns:1.08fr 1.3fr 1fr;margin-top:50px;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}.claim-model>div{padding:26px 30px 30px;border-right:1px solid var(--rule)}.claim-model>div:first-child{padding-left:0}.claim-model>div:last-child{border:0;padding-right:0}.claim-model .eyebrow{display:block;margin-bottom:24px}.model-source code{display:block;color:var(--muted);font-size:.75rem}.model-source blockquote{font-family:var(--serif);font-size:1.55rem;line-height:1.3;margin:18px 0 0;letter-spacing:-.02em}.arrow-down{display:block;margin-top:18px;font-size:1.6rem;color:var(--muted)}dl{margin:0;font-family:var(--mono);font-size:.76rem}dl>div{display:grid;grid-template-columns:90px 1fr;padding:11px 0;border-bottom:1px solid var(--rule)}dl>div:last-child{border:0}dt{color:var(--muted)}dd{margin:0;overflow-wrap:anywhere}.comparison>p{font-size:.78rem}.equation{font-size:1.5rem;margin:15px 0}.equation b{font-weight:400;color:var(--accent);margin:0 6px}.model-note{font-size:.79rem;color:var(--muted);line-height:1.7;margin:24px 0 0;max-width:890px}.finding-browser{display:grid;grid-template-columns:215px 1fr;margin-top:45px;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}.story-nav{border-right:1px solid var(--rule)}.story-nav button{display:flex;gap:13px;width:100%;align-items:center;text-align:left;padding:22px 16px 22px 0;border:0;border-bottom:1px solid var(--rule);background:none;font-size:.8rem}.story-nav button:last-child{border-bottom:0}.story-nav button>span:first-child{color:var(--muted);font-size:max(12px,.62rem)}.story-nav button>span:last-child{margin-left:auto}.story-nav button[aria-pressed=true]{color:var(--accent);font-weight:600;box-shadow:inset 3px 0 var(--accent);padding-left:14px}.story-content{padding:30px 0 25px 32px;min-width:0}.story-content h3{margin:12px 0 30px;max-width:620px;font-size:2.05rem;min-height:75px}.evidence-pair{display:grid;grid-template-columns:1fr 1fr;gap:26px}.source{min-width:0}.source-path{font-size:max(12px,.66rem);overflow-wrap:anywhere;line-height:1.6}.source-path span{color:var(--muted)}.source>strong{display:block;font-family:var(--mono);font-size:1.35rem;font-weight:400;margin:14px 0;color:var(--accent)}.source pre{font-size:max(12px,.68rem);line-height:1.7;padding:14px 0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);min-height:68px;margin:0}.source-meta{font-size:max(12px,.61rem);line-height:1.6;color:var(--muted);margin-top:9px}.finding-footnote{font-size:.7rem;color:var(--muted);line-height:1.65;margin-top:25px;max-width:650px}.product-heading{display:flex;justify-content:space-between;align-items:end;gap:70px;margin-bottom:40px}.product-heading .eyebrow{margin-bottom:23px}.product-heading>p{max-width:380px;color:var(--muted);font-size:.93rem}.graph-figure{background:#151c18;padding:28px 28px 0}.graph-figure img{width:100%;height:auto;display:block;max-height:630px;object-fit:contain}.graph-figure figcaption{color:#bcc8bd;border-top:1px solid #465047;display:flex;justify-content:space-between;gap:24px;padding:22px 0;font-size:.73rem}.graph-figure .mono{font-size:max(12px,.62rem)}figure a{display:block}.graph-figure figcaption a{display:inline}.evidence-section{display:grid;grid-template-columns:.8fr 1.2fr;gap:64px;align-items:center;margin-top:84px}.evidence-section h2{font-size:3.3rem;margin:20px 0 25px}.evidence-section p:not(.eyebrow){font-size:.86rem;line-height:1.7;color:var(--muted);margin-bottom:16px}.text-link{font-size:.78rem;display:inline-block;margin-top:7px}.evidence-section img{width:100%;height:auto;display:block}.evidence-section figcaption{font-size:max(12px,.61rem);color:var(--muted);margin-top:15px}.history-note{display:grid;grid-template-columns:190px 1fr;gap:28px;border-top:1px solid var(--rule);margin-top:42px;padding-top:25px}.history-note .mono{color:var(--muted)}.history-note p{font-size:.79rem;color:var(--muted);max-width:770px}.context-examples{display:grid;grid-template-columns:1fr 1fr;gap:48px;margin-top:45px}.context-examples article{border-top:1px solid var(--ink);padding-top:20px}.context-title{display:flex;justify-content:space-between;gap:20px;align-items:center}.context-title>.mono{font-size:max(12px,.64rem)}.context-title button{font-size:max(12px,.67rem)}.context-lines{margin:25px 0}.context-lines p{display:flex;justify-content:space-between;padding:15px 0;border-bottom:1px solid var(--rule);font-size:.81rem;gap:12px}.context-lines strong{font-family:var(--mono);font-size:1.05rem;font-weight:400}.historical{text-decoration:line-through;color:var(--muted)}.context-result{font-size:.8rem;margin-bottom:16px;min-height:45px}.try{display:grid;grid-template-columns:1fr 1fr;gap:65px}.try h2{margin:22px 0}.try>div>p:not(.eyebrow){color:var(--muted);font-size:.9rem;max-width:445px;margin-bottom:27px}.download-link{display:block;width:fit-content;margin-top:22px;font-size:.76rem}.quickstart{border-top:1px solid var(--ink);padding-top:22px}.quickstart pre{font-size:.7rem;line-height:1.85;padding:25px 0 20px;margin:0}.quickstart code{font-size:inherit}.try .quickstart .small{font-size:.73rem;line-height:1.7;margin-bottom:15px;max-width:none}.limits{display:grid;grid-template-columns:260px 1fr;gap:40px;padding:38px 0;border-bottom:1px solid var(--ink);font-size:.74rem}.limits strong{font-weight:500}.limits p{color:var(--muted);line-height:1.7;max-width:800px}footer{padding-top:35px;padding-bottom:40px;display:flex;align-items:center;gap:40px}footer p{font-size:.7rem;color:var(--muted)}footer>a:last-child{margin-left:auto;font-size:.72rem}.diverged .claim-pair strong{animation:change-in .3s ease-out}@keyframes change-in{0%{transform:translateY(-5px);opacity:.3}to{transform:none;opacity:1}}@media(min-width:1500px){.hero{padding-top:86px}.hero h1{font-size:5.8rem}}@media(max-width:1100px){.site-header,main,footer{padding-left:30px;padding-right:30px}.hero{gap:35px}.hero h1{font-size:4.5rem}.hero-note{max-width:300px}.claim-pair{padding-left:18px;padding-right:18px;grid-template-columns:1fr 42px 1fr}.claim-pair strong{font-size:2.55rem}.instrument-top{padding-left:18px;padding-right:18px}.replay{align-items:start}.section-heading{column-gap:45px}.claim-model>div{padding-left:20px;padding-right:20px}dl>div{grid-template-columns:78px 1fr}dl{font-size:max(12px,.65rem)}.evidence-section{gap:35px}.evidence-section h2{font-size:2.8rem}.product-heading{gap:35px}.product-heading>p{max-width:330px}}@media(max-width:800px){.site-header{height:84px}.site-header nav{gap:20px}.site-header nav a:first-child{display:none}.hero{grid-template-columns:1fr;padding-top:44px;gap:38px}.hero h1{font-size:clamp(4.3rem,11vw,6.4rem)}.hero h1 br:nth-of-type(2){display:none}.hero-intro{max-width:550px}.hero-note{margin-top:24px;max-width:none}.experiment{max-width:620px;width:100%;justify-self:center}.claim-pair{grid-template-columns:1fr 95px 1fr;padding:30px}.claim-pair strong{font-size:3.5rem}.instrument-top{padding-left:24px;padding-right:24px}.replay .mono{max-width:none}.artifact-strip{gap:15px;font-size:.72rem}.artifact-strip>.eyebrow{width:100%;margin-bottom:4px}.section{padding:62px 0}.section-heading{grid-template-columns:1fr;gap:22px}.section-heading>.eyebrow{margin:0}.section-heading>p:last-child{max-width:600px}.claim-model{grid-template-columns:1fr 1fr}.claim-model>div:nth-child(2){border-right:0;padding-right:0}.claim-model>div:last-child{border-top:1px solid var(--rule);grid-column:1/-1;padding:25px 0;display:grid;grid-template-columns:1fr 1fr;gap:15px}.comparison .eyebrow{margin:0}.comparison>p:first-of-type{grid-column:1;grid-row:2/4}.comparison .equation{margin:0;grid-column:2;grid-row:1/3}.comparison>p:last-child{grid-column:2;grid-row:3}.finding-browser{grid-template-columns:1fr}.story-nav{display:flex;overflow-x:auto;border-right:0;border-bottom:1px solid var(--rule)}.story-nav button{flex:0 0 auto;width:auto;padding:18px 16px;border:0;gap:9px}.story-nav button[aria-pressed=true]{box-shadow:inset 0 -3px var(--accent);padding-left:16px}.story-nav button>span:last-child{display:none}.story-content{padding:26px 0}.story-content h3{min-height:0}.product-heading{display:block}.product-heading>p{max-width:600px;margin-top:24px}.evidence-section{grid-template-columns:1fr;margin-top:55px}.evidence-section>div{max-width:600px}.graph-figure{padding:10px 10px 0}.graph-figure figcaption{font-size:max(12px,.63rem);padding:16px 0}.graph-figure .mono{font-size:max(12px,.55rem)}.history-note{grid-template-columns:1fr;gap:12px}.context-examples{grid-template-columns:1fr;gap:38px}.context-result{min-height:0}.try{grid-template-columns:1fr;gap:40px}.try>div>p:not(.eyebrow){max-width:600px}.limits{grid-template-columns:1fr;gap:15px}footer{flex-wrap:wrap;gap:24px}footer>a:last-child{margin-left:0}}@media(max-width:480px){:root{font-size:16px}.site-header,main,footer{padding-left:20px;padding-right:20px}.site-header nav{font-size:.75rem}.site-header nav a:nth-child(2){display:none}.hero{padding-top:32px;padding-bottom:35px;gap:30px}.hero h1{font-size:3.15rem;line-height:.99;margin-top:24px}.hero h1 br:nth-of-type(2){display:block}.hero-intro{font-size:.94rem}.hero-note{gap:8px 13px;font-size:max(12px,.62rem)}.claim-pair{grid-template-columns:1fr 40px 1fr;padding:24px 16px;gap:8px}.claim-pair strong{font-size:2.7rem}.claim-pair .mono{font-size:max(12px,.64rem)}.claim-pair p{margin-top:18px}.claim-caption{font-size:max(12px,.62rem)}.instrument-top{padding:15px 16px;font-size:max(12px,.57rem)}.experiment-control{padding-left:16px;padding-right:16px}.finding{padding:17px 16px}.experiment-evidence{padding:16px}.replay{padding:20px 16px 12px;align-items:center}.replay>.text-button{max-width:145px}.replay>.mono{max-width:120px}.steps{margin:0 16px}.stage-description{margin-left:16px;margin-right:16px;min-height:48px}.replay-note{margin-left:16px;margin-right:16px}.section{padding:48px 0}h2{font-size:2.85rem}.claim-model{grid-template-columns:1fr;margin-top:28px}.claim-model>div{padding:24px 0;border-right:0;border-bottom:1px solid var(--rule)}.claim-model>div:last-child{grid-column:1;border-top:0;border-bottom:0}.claim-model .eyebrow{margin-bottom:16px}.model-source blockquote{font-size:1.7rem}.arrow-down{display:none}dl{font-size:.79rem}dl>div{grid-template-columns:110px 1fr}.comparison{font-size:.9rem}.comparison .equation{font-size:1.3rem;align-self:center}.comparison>p:last-child{font-size:.72rem}.evidence-pair{grid-template-columns:1fr;gap:26px}.source>strong{margin:10px 0}.source pre{min-height:0}.story-content h3{font-size:1.9rem}.story-nav button{padding:17px 14px;font-size:.76rem}.story-nav button .mono{display:none}.graph-figure{margin:0 -20px;padding:10px}.graph-figure figcaption{flex-direction:column;gap:10px;padding-bottom:7px}.graph-figure img{min-height:250px;object-fit:cover;object-position:center}.evidence-section figure{margin:0 -10px}.evidence-section figcaption{margin-left:10px}.context-title{gap:10px}.context-title>.mono{font-size:max(12px,.62rem)}.context-title button{font-size:max(12px,.67rem);max-width:170px;text-align:right}.context-lines p{font-size:.77rem}.context-result{font-size:.75rem}.quickstart pre{font-size:max(12px,.66rem)}.limits{padding:28px 0}footer .wordmark{width:100%}footer p{font-size:.75rem}footer>a:last-child{font-size:.73rem}}@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}.evidence-section{grid-template-columns:1fr 1fr}.evidence-section>div{max-width:none;grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:16px 64px}.evidence-section .eyebrow{grid-column:1/-1}.evidence-section h2{grid-column:1;grid-row:2/5;margin:0}.evidence-section p:not(.eyebrow){margin:0}.evidence-section figure{grid-column:1/-1;width:100%;max-width:1060px;justify-self:center}.evidence-section .text-link{justify-self:start}.graph-figure img{max-height:none}@media(max-width:800px){.evidence-section>div{display:block}.evidence-section h2{margin:20px 0}.evidence-section p:not(.eyebrow){margin-bottom:16px}}@media(max-width:600px){.graph-figure img{min-height:0;object-fit:contain;aspect-ratio:668/296}.evidence-section img{aspect-ratio:656/1182}.evidence-section figure{max-width:390px;width:100%;margin:0}}