:root{--ink:#151719;--muted:#62676b;--line:#dedfe0;--paper:#f6f6f4}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px}
body{margin:0;background:#fff;color:var(--ink);font:16px/1.6 Arial,Helvetica,sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
a:focus-visible{outline:3px solid #7d7d7d;outline-offset:5px}
.shell{max-width:1320px;margin:auto;padding:0 56px}
.skip{position:absolute;top:-100px;left:20px;background:white;padding:12px;z-index:20}
.skip:focus{top:10px}
header{height:100px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}
nav{display:flex;gap:30px;font-size:13px}
nav a{padding:8px 0}
nav>a:last-child{border-bottom:1px solid}
.logo{position:relative;aspect-ratio:1190/490;overflow:hidden;display:block}
.logo img{position:absolute;max-width:none;width:149.08%;height:auto;left:-21%;top:-40.8%}
.brand{width:118px}
.hero{padding:30px 0 58px}
.hero-top{display:flex;justify-content:space-between;font-size:11px;color:var(--muted)}
.hero-wordmark{width:100%;max-width:850px;margin:30px auto 34px}
.hero-bottom{display:flex;justify-content:space-between;align-items:flex-end;gap:40px}
h1,h2,h3,p{margin:0}
h1{font-size:clamp(28px,3vw,42px);letter-spacing:-1.5px;line-height:1.15;font-weight:500}
p{color:var(--muted);font-size:15px;line-height:1.8;margin-top:16px}
.button{display:inline-flex;align-items:center;justify-content:space-between;gap:42px;background:var(--ink);color:#fff;min-height:54px;padding:15px 21px;font-size:13px;transition:background .15s}
.button:hover{background:#34383b}
.button span{font-size:20px}
.hero-bottom>div:last-child{flex-shrink:0}
small{display:block;font-size:11px;color:var(--muted);margin-top:10px}
section:not(.hero){border-top:1px solid var(--line);padding:60px 0}
.section-heading{margin-bottom:38px}
.label{font-size:10px;letter-spacing:1.5px;color:var(--muted);display:block;margin-bottom:18px}
h2{font-size:clamp(29px,3.6vw,46px);letter-spacing:-1.6px;line-height:1.14;font-weight:500}
.section-heading p{max-width:570px;font-size:14px}
.meaning-row{display:grid;grid-template-columns:1fr 1.35fr;gap:60px;padding:34px 0;border-top:1px solid var(--line);align-items:center}
.notation{font:italic 58px/1.2 Georgia,serif;letter-spacing:-3px;background:var(--paper);min-height:200px;padding:32px;display:flex;flex-direction:column;justify-content:center;align-items:center}
.notation small{font:10px/1.5 Arial,sans-serif;letter-spacing:1.5px;margin-top:22px}
.recursion{font-size:48px;letter-spacing:-2px}
.fork{width:128px;height:100px;display:block}
h3{font-size:24px;letter-spacing:-.7px;line-height:1.3;font-weight:500}
.application{font-size:13px;color:var(--ink)}
.source{font-size:12px;border-bottom:1px solid #c3c4c5;display:inline-block;padding:8px 0 5px;margin-top:12px;line-height:1.5}
.source:hover{border-color:var(--ink)}
section#sales{background:var(--paper);padding:48px 40px;margin:24px -40px 0;border-top:0}
.sales-table{border-top:1px solid var(--ink)}
.sales-row{display:grid;grid-template-columns:.7fr 1fr 1.5fr;gap:32px;padding:26px 0;border-bottom:1px solid var(--line);align-items:start}
.sales-head{font-size:10px;letter-spacing:1px;text-transform:uppercase;color:var(--muted);padding:13px 0}
.sales-row strong{font-size:28px;font-weight:500;letter-spacing:-1px}
.sales-row b{font-size:22px;font-weight:500;letter-spacing:-.6px}
.sales-row small{font-size:11px;margin-top:7px}
.sales-row div>span{display:block;font-size:12px;color:var(--muted)}
.sales-row div>a{display:block;font-size:12px;padding:5px 0;text-decoration:underline;text-underline-offset:4px;text-decoration-color:#b4b6b8;line-height:1.5}
.sales-row div>a:hover{text-decoration-color:var(--ink)}
.acquisitions{margin-top:42px}
.acquisitions-heading p{margin-top:10px;font-size:13px}
.acquisition-grid{display:grid;grid-template-columns:1fr 1fr;gap:38px;margin-top:26px}
.acquisition-grid article{border-top:1px solid #bbb;padding-top:20px}
.acquisition-top{display:flex;align-items:center;justify-content:space-between;gap:20px}
.acquisition-top strong{font-weight:500;font-size:26px;letter-spacing:-.6px}
.acquisition-top span{font-size:12px;color:var(--muted)}
.acquisition-grid p{font-size:14px;margin-top:10px}
.sales-note{font-size:11px;max-width:660px;margin-top:30px}
section.acquire{background:var(--ink);color:#fff;border-top:0;padding:48px 40px;margin:40px -40px;display:flex;justify-content:space-between;align-items:center;gap:40px}
.acquire .label,.acquire p{color:#b8bcc0}
.acquire h2{max-width:540px}
.acquire p{font-size:14px}
.acquire .button{background:#fff;color:var(--ink)}
.acquire .button:hover{background:#e7e7e4}
.email{display:block;font-size:12px;margin-top:15px;text-decoration:underline;text-underline-offset:4px}
footer{padding:0 0 85px;display:flex;justify-content:space-between;align-items:center;gap:20px;font-size:11px;color:var(--muted)}
.footer-logo{width:90px}
.ultra-badge{position:fixed;right:20px;bottom:18px;background:white;border:1px solid #ddd;border-radius:4px;padding:9px 12px;font-size:10px;box-shadow:0 2px 10px #00000007}
@media(max-width:900px){.shell{padding:0 32px}.meaning-row{gap:32px}.notation{font-size:50px;padding:24px}.recursion{font-size:40px}.sales-row{gap:20px}section#sales,section.acquire{margin-left:0;margin-right:0;padding:40px 28px}.acquire h2{font-size:36px}}
@media(max-width:650px){
 .shell{padding:0 22px}header{height:78px}.brand{width:94px}nav>a:not(:last-child){display:none}
 .hero{padding:24px 0 38px}.hero-top{font-size:10px;gap:12px;align-items:flex-start}.hero-top span:last-child{text-align:right}
 .hero-wordmark{margin:36px auto 30px}.hero-bottom{display:block}h1{font-size:29px;letter-spacing:-1px}p{font-size:14px}
 .hero-bottom>div:last-child{margin-top:24px}.button{font-size:13px;min-height:52px;padding:13px 18px}
 section:not(.hero){padding:38px 0}.section-heading{margin-bottom:28px}.label{font-size:9px}h2{font-size:32px;letter-spacing:-1px}
 .meaning-row{grid-template-columns:1fr;gap:24px;padding:30px 0}.notation{font-size:48px;letter-spacing:-2px;min-height:174px;padding:28px}.notation small{font-size:10px;margin-top:16px}
 .recursion{font-size:40px}.fork{height:92px;width:116px}h3{font-size:22px}
 section#sales{padding:32px 20px;margin-top:8px}.sales-head{display:none}
 .sales-row{grid-template-columns:1fr 1.4fr;gap:12px 14px;padding:24px 0}.sales-row>div:last-child{grid-column:1/-1;padding-top:4px}
 .sales-row strong{font-size:25px}.sales-row b{font-size:20px;line-height:1.4}.sales-row small{font-size:11px;line-height:1.5}.sales-row div>a{font-size:12px}
 .acquisition-grid{grid-template-columns:1fr;gap:28px}.acquisitions{margin-top:34px}.acquisitions-heading h3{font-size:22px}.sales-note{line-height:1.6}
 section.acquire{display:block;padding:34px 24px;margin-top:28px;margin-bottom:28px}.acquire h2{font-size:32px}.acquire>div:last-child{margin-top:25px}
 footer>span:not(.logo){display:none}footer{padding-bottom:82px}.ultra-badge{right:14px;bottom:14px;font-size:10px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}}