:root{--bg:#101110;--fg:#fff;--mute:#b2b5b0;--dim:#6d706b;--line:#2a2c29;--lime:#d5f74b;--r:3px;--gap:96px;--max:1120px}
*{box-sizing:border-box}
html{background:var(--bg);color:var(--fg);font:16px/1.55 -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter","Segoe UI",Roboto,sans-serif;-webkit-font-smoothing:antialiased}
body{margin:0}
a{color:inherit;text-decoration:none}
p a,li a{text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--dim)}
p a:hover,li a:hover{text-decoration-color:var(--fg)}
img,svg{display:block;max-width:100%}
.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}
.mono{font:12px/1.4 ui-monospace,"SF Mono",Menlo,Consolas,monospace;letter-spacing:.06em;text-transform:uppercase;color:var(--mute)}
/* header */
header{padding:22px 0}
header .wrap{display:flex;align-items:center;gap:32px}
.lockup img{height:26px;width:auto}
nav{margin-left:auto;display:flex;align-items:center;gap:28px;font-size:15px;color:var(--mute)}
nav a:hover,nav a[aria-current]{color:var(--fg)}
.btn{display:inline-block;background:var(--lime);color:#0e0f0e;font-weight:600;padding:9px 16px;border-radius:var(--r);font-size:15px;line-height:1.2}
.btn:hover,nav a.btn:hover{background:#e3ff6a;color:#0e0f0e}
/* doubled hairline: everything in twos */
.rule{height:5px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:0 24px}
@media (min-width:1168px){.rule{margin:0 auto;max-width:var(--max)}}
/* sections */
section{padding:var(--gap) 0}
section+section{padding-top:0}
h1{font-size:clamp(34px,5vw,56px);line-height:1.05;letter-spacing:-.02em;margin:0 0 20px;font-weight:700}
h2{font-size:clamp(24px,3vw,32px);line-height:1.15;letter-spacing:-.015em;margin:0 0 12px;font-weight:600}
h3{font-size:18px;margin:0 0 8px;font-weight:600}
.lead{font-size:18px;color:var(--mute);max-width:36em;margin:0 0 28px}
p{margin:0 0 14px;color:var(--mute);max-width:42em}
p strong,li strong{color:var(--fg);font-weight:600}
.x{color:var(--dim);margin-right:10px}
.kicker{margin:0 0 14px}
/* hero 5:6 */
.hero{display:grid;grid-template-columns:5fr 6fr;gap:48px;align-items:center}
.buy{margin:0;display:flex;align-items:center;gap:18px;flex-wrap:wrap;max-width:none}
.buy .alt{color:var(--mute);font-size:15px;text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--dim)}
.buy .alt:hover{color:var(--fg)}
.pills{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.pill{border:1px solid var(--line);border-radius:var(--r);padding:5px 10px;font-size:13px;color:var(--mute)}
.pill.on{border-color:var(--lime);color:var(--lime)}
/* placeholders: two frames and a crossing */
.ph{margin:0;aspect-ratio:var(--ar,3/2);position:relative;border:1px solid var(--line);border-radius:var(--r);padding:6px}
.ph .in{position:absolute;inset:6px;border:1px solid var(--line);border-radius:2px;overflow:hidden}
.ph svg{width:100%;height:100%}
.ph svg line{stroke:var(--line);stroke-width:1;vector-effect:non-scaling-stroke}
.ph figcaption{position:absolute;left:16px;bottom:14px}
.ph figcaption b{color:var(--dim);font-weight:500;margin-left:10px}
/* 2x2 features */
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:40px 48px}
.feat h3{margin-top:18px}
.feat .mono{margin-bottom:6px}
/* requirements table */
.req{display:grid;grid-template-columns:repeat(3,1fr);gap:32px}
.req h3{font-size:16px}
.req p{font-size:15px}
/* notes */
.notes{display:grid;grid-template-columns:1fr 1fr;gap:24px 48px}
/* guide + releases */
.toc{columns:3;column-gap:32px;padding:0;margin:0 0 var(--gap);list-style:none;font-size:15px;color:var(--mute)}
.toc li{margin:0 0 8px;break-inside:avoid}
.toc a:hover{color:var(--fg)}
.doc h2{margin-top:0;padding-top:0}
.doc article{padding:48px 0;border-top:1px solid var(--line);position:relative}
.doc article:first-of-type{border-top:0;padding-top:0}
.doc ul,.doc ol{color:var(--mute);max-width:42em;padding-left:20px;margin:0 0 14px}
.doc li{margin-bottom:6px}
code{font:.92em ui-monospace,"SF Mono",Menlo,Consolas,monospace;color:var(--fg);background:#1a1b1a;padding:1px 5px;border-radius:2px}
.path{color:var(--fg)}
table{border-collapse:collapse;width:100%;font-size:14px;margin:8px 0 14px}
td,th{text-align:left;padding:8px 12px 8px 0;border-bottom:1px solid var(--line);vertical-align:top;color:var(--mute)}
th{color:var(--fg);font-weight:600}
td.sha{font:12px ui-monospace,"SF Mono",Menlo,Consolas,monospace;word-break:break-all;color:var(--dim)}
/* footer */
footer{padding:40px 0 48px;font-size:13px;color:var(--dim)}
footer .wrap{display:flex;flex-wrap:wrap;gap:8px 32px}
@media (max-width:880px){
  :root{--gap:48px}
  .hero,.grid2,.notes{grid-template-columns:1fr}
  .req{grid-template-columns:1fr;gap:20px}
  .toc{columns:1}
  nav{gap:18px;font-size:14px}
  nav .btn{padding:8px 12px;font-size:14px}
  .wrap{padding:0 16px}
  .rule{margin:0 16px}
}
@media (max-width:560px){nav span.hide{display:none}}