:root{--ink:#111;--muted:#5b5b5b;--pink:#ff007a;--soft:#f6f6f4;--max:660px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:96px}body{margin:0;zoom:1.25;background:#fff;color:var(--ink);font-family:'IBM Plex Mono',ui-monospace,monospace;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}a:hover{color:var(--pink)}::selection{background:var(--pink);color:#fff}.header{position:sticky;top:0;z-index:20;background:#fff}.nav{width:min(var(--max),100%);height:52px;margin:auto;display:flex;align-items:stretch;border-left:1px solid var(--ink);border-right:1px solid var(--ink);border-bottom:1px solid var(--ink)}.brand{display:flex;align-items:center;padding:0 16px}.brand img{width:20px;height:20px;border-radius:3px}.links{display:flex;flex:1}.links a{display:flex;flex:1;align-items:center;justify-content:center;padding:0 8px;border-left:1px solid var(--ink);font-size:9px;font-weight:600;letter-spacing:.1em}.links .trade{background:var(--pink);color:#fff;letter-spacing:.14em}.strip{width:min(var(--max),100%);height:26px;margin:auto;display:flex;align-items:center;overflow:hidden;white-space:nowrap;border-left:1px solid var(--ink);border-right:1px solid var(--ink);border-bottom:1px solid var(--ink);font-size:9px;font-weight:600;letter-spacing:.14em}.strip-track{display:flex;width:max-content;will-change:transform;animation:mechanismMarquee 52s linear infinite}.strip-track>span{display:block;padding-right:0}.dot{color:var(--pink)}@keyframes mechanismMarquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}.shell{width:min(var(--max),100%);margin:auto;border-left:1px solid var(--ink);border-right:1px solid var(--ink);border-bottom:1px solid var(--ink)}.hero{padding:54px 28px 0;border-bottom:1px solid var(--ink)}.hero-logo{width:44px;height:44px;display:block;border-radius:3px}h1{margin:22px 0 0;font-size:36px;line-height:1.2;font-weight:400;letter-spacing:-.025em}.lead{margin:20px 0 42px;max-width:570px;font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:13.5px;line-height:1.8;color:#222}.hero-meta{margin:0 -28px;display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--ink)}.hero-meta div{padding:15px 17px;border-right:1px solid var(--ink)}.hero-meta div:last-child{border-right:0}.kicker,.label{font-size:9px;font-weight:600;letter-spacing:.16em;color:var(--muted)}.value{margin-top:7px;font-size:12px;line-height:1.5}.toc{padding:0;border-bottom:1px solid var(--ink)}[id]{scroll-margin-top:96px}.toc a{display:grid;grid-template-columns:42px 1fr 20px;gap:10px;padding:11px 28px;border-bottom:1px solid rgba(0,0,0,.16);font-size:10px;line-height:1.5}.toc a:last-child{border-bottom:0}.toc .n{color:#999}.toc .arrow{color:var(--pink);text-align:right}section{padding:56px 28px;border-bottom:1px solid var(--ink)}h2{margin:15px 0 0;font-size:22px;line-height:1.42;font-weight:400;letter-spacing:-.01em}.intro{margin:14px 0 0;font-family:'IBM Plex Mono',ui-monospace,monospace;font-size:12.5px;line-height:1.8;color:#333}.rows{margin:26px -28px 0;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}.row{display:grid;grid-template-columns:150px 1fr;gap:18px;padding:14px 28px;border-bottom:1px solid rgba(0,0,0,.16)}.row:last-child{border-bottom:0}.row h3{margin:0;font-size:9.5px;line-height:1.6;letter-spacing:.08em}.row p{margin:0;font-size:10.5px;line-height:1.72;color:#3d3d3d}.pink{color:var(--pink)}.equation{margin:24px -28px 0;padding:24px 28px;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink);text-align:center}.equation code{font-family:'STIX Two Text',Georgia,serif;font-size:18px;line-height:1.65;font-style:italic;white-space:normal}.equation p{margin:10px 0 0;font-size:9.5px;line-height:1.7;color:var(--muted)}.table-wrap{margin:24px -28px 0;overflow-x:auto;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}table{width:100%;border-collapse:collapse;min-width:580px}th,td{padding:11px 12px;border-right:1px solid rgba(0,0,0,.16);border-bottom:1px solid rgba(0,0,0,.16);font-size:9.5px;line-height:1.55;text-align:left;vertical-align:top}th:last-child,td:last-child{border-right:0}tr:last-child td{border-bottom:0}th{font-size:8.5px;letter-spacing:.12em;color:var(--muted);font-weight:600}.flow{margin:26px 0 0;display:grid;grid-template-columns:1fr 24px 1fr 24px 1fr}.node{padding:12px 10px;border:1px solid var(--ink);border-radius:3px;font-size:9px;line-height:1.6;font-weight:600}.flow-arrow{display:flex;align-items:center;justify-content:center;color:var(--pink)}.split{margin:26px -28px 0;display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}.panel{padding:20px 22px}.panel+.panel{border-left:1px solid var(--ink)}.panel h3{margin:0;font-size:10px;letter-spacing:.08em}.panel p{margin:12px 0 0;font-size:10.5px;line-height:1.72;color:#3d3d3d}.steps{margin:26px -28px 0;border-top:1px solid var(--ink);border-bottom:1px solid var(--ink)}.step{display:grid;grid-template-columns:32px 1fr;gap:12px;padding:13px 28px;border-bottom:1px solid rgba(0,0,0,.16)}.step:last-child{border-bottom:0}.step .n{font-size:9px;color:#999}.step p{margin:0;font-size:10.5px;line-height:1.72}.note{margin:20px 0 0;padding:12px 14px;border-left:1px solid var(--pink);background:var(--soft);font-size:10px;line-height:1.72;color:#444}.cta{padding:52px 28px;text-align:center;border-bottom:1px solid var(--ink)}.cta img{width:44px;height:44px;border-radius:3px}.cta h2{margin-top:16px}.buttons{margin-top:22px;display:flex;justify-content:center;gap:10px;flex-wrap:wrap}.button{padding:10px 18px;border:1px solid var(--ink);border-radius:3px;font-size:10px;font-weight:600;letter-spacing:.13em}.button.primary{border-color:var(--pink);background:var(--pink);color:#fff}footer{padding:24px 28px;display:flex;justify-content:space-between;gap:18px;font-size:8.5px;line-height:1.7;color:#666}footer a{color:var(--ink);font-weight:600}@media(max-width:825px){body{zoom:1}}@media(max-width:560px){.brand{padding:0 12px}.links a{padding:0 5px;font-size:8px;letter-spacing:.04em}.hero{padding:44px 20px 0}h1{font-size:31px}.lead{font-size:13px}.hero-meta{margin:0 -20px}.hero-meta div{padding:13px 10px}.value{font-size:10px}.toc a{padding-left:20px;padding-right:20px}section{padding:46px 20px}.rows,.equation,.table-wrap,.split,.steps{margin-left:-20px;margin-right:-20px}.row,.step{padding-left:20px;padding-right:20px}.row{grid-template-columns:1fr;gap:7px}.flow{grid-template-columns:1fr}.flow-arrow{min-height:26px;transform:rotate(90deg)}.split{grid-template-columns:1fr}.panel+.panel{border-left:0;border-top:1px solid var(--ink)}footer{padding:22px 20px;flex-direction:column}}@media(max-width:390px){.links a:nth-child(3){display:none}.lead{font-size:15px}.hero-meta{grid-template-columns:1fr}.hero-meta div{border-right:0;border-bottom:1px solid var(--ink)}.hero-meta div:last-child{border-bottom:0}}@media(max-width:640px){html,body{width:100%;max-width:100%;overflow-x:hidden}.nav,.strip,.shell{width:100%;max-width:none}.nav{height:48px}.brand{flex:0 0 46px;justify-content:center;padding:0 11px}.links{min-width:0}.links a{min-width:0;padding:0 4px;font-size:8px;letter-spacing:.035em;white-space:nowrap}.strip{height:24px;font-size:8px;letter-spacing:.1em}.strip-track>span{padding-right:0}.hero{padding-top:42px}.toc a{min-height:44px;align-items:center}.table-wrap{-webkit-overflow-scrolling:touch;overscroll-behavior-x:contain}.table-wrap:focus-within{outline:1px solid var(--pink);outline-offset:-1px}table{min-width:540px}.button{min-height:44px;display:flex;align-items:center;justify-content:center}a{touch-action:manipulation}.row p,.step p,.panel p{overflow-wrap:anywhere}}
@media(max-width:420px){.links a{padding:0 2px;font-size:7.25px;letter-spacing:.01em}.links a:nth-child(3){display:none}.hero{padding:38px 18px 0}.hero h1{font-size:28px}.lead{font-size:12.5px;line-height:1.75}.hero-meta{margin-left:-18px;margin-right:-18px;grid-template-columns:1fr}.hero-meta div{border-right:0;border-bottom:1px solid var(--ink);padding:11px 18px}.hero-meta div:last-child{border-bottom:0}.toc a{grid-template-columns:34px 1fr 16px;padding-left:18px;padding-right:18px}section{padding:42px 18px}.rows,.equation,.table-wrap,.split,.steps{margin-left:-18px;margin-right:-18px}.row,.step{padding-left:18px;padding-right:18px}.equation{padding-left:18px;padding-right:18px}.equation code{font-size:17px}.buttons{display:grid;grid-template-columns:1fr}.button{width:100%}table{min-width:500px}.cta{padding:44px 18px}footer{padding:20px 18px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.strip-track{animation:none}}
.label,.row h3,.panel h3,.step .n,.toc .n{color:var(--pink);font-weight:400}
.x-icon svg{width:13px;height:13px;display:block;fill:currentColor}.links .x-icon{flex:0 0 42px}.footer-x{display:inline-flex;align-items:center;vertical-align:-2px}@media(max-width:640px){.links .x-icon{flex-basis:36px}}
/* compact navigation */
.links{justify-content:flex-end;align-items:center;gap:7px;padding:0 10px}.links a{flex:0 0 auto;height:30px;padding:0 10px;border:1px solid var(--ink);border-radius:3px}.links a:not(.trade):hover{border-color:var(--pink)}.links .x-icon{flex:0 0 30px;width:30px;padding:0}.links .trade{border-color:var(--pink)}
@media(max-width:640px){.links{gap:4px;padding:0 6px}.links a{height:28px;padding:0 6px;font-size:7.75px;letter-spacing:.025em}.links .x-icon{flex:0 0 28px;width:28px;padding:0}}
/* mechanism density */
.toc{display:grid;grid-template-columns:repeat(2,minmax(0,1fr))}
.toc a{grid-template-columns:28px minmax(0,1fr) 14px;padding:10px 18px}
.toc a:nth-child(odd){border-right:1px solid rgba(0,0,0,.16)}
.toc a:last-child{grid-column:1/-1;border-right:0;border-bottom:0}
section{padding:44px 28px}
h2{margin-top:10px}
.intro{margin-top:12px}
.rows,.flow,.split,.steps{margin-top:22px}
.equation,.table-wrap{margin-top:20px}
.car-weight-table table{min-width:0;table-layout:fixed}
.car-weight-table th,.car-weight-table td{width:50%}
.car-weight-note{margin-top:0;border-top:0}
.row{padding-top:12px;padding-bottom:12px}
.step{padding-top:12px;padding-bottom:12px}
.note{margin-top:16px}
.cta{padding:44px 28px}
.site-footer{padding:22px 28px 30px;display:block;color:#666}
.footer-top{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.footer-brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-size:11px;font-weight:500;letter-spacing:.18em}
.footer-brand img{width:16px;height:16px;display:block;border-radius:3px}
.footer-links{display:flex;align-items:center;gap:16px;font-size:10px;letter-spacing:.1em}
.footer-links a{display:inline-flex;align-items:center;color:var(--ink);font-weight:500}
.site-footer p{margin:22px 0 0;max-width:560px;font-size:9.5px;line-height:1.8;color:#777}

/* text motion */
@keyframes mechanismTextIn{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}
@keyframes mechanismScaleIn{from{opacity:0;transform:translateY(8px) scale(.96)}to{opacity:1;transform:translateY(0) scale(1)}}
.hero-logo{animation:mechanismScaleIn .72s cubic-bezier(.22,1,.36,1) .06s both}
.hero h1{animation:mechanismTextIn .78s cubic-bezier(.22,1,.36,1) .16s both}
.lead{animation:mechanismTextIn .78s cubic-bezier(.22,1,.36,1) .32s both}

@media(max-width:560px){
  .toc{grid-template-columns:1fr}
  .toc a:nth-child(odd){border-right:0}
  .toc a:last-child{grid-column:auto}
  section{padding:38px 20px}
  .site-footer{padding:22px 20px 28px}
  .footer-top{align-items:flex-start}
}
@media(max-width:420px){
  section{padding:36px 18px}
  .site-footer{padding:20px 18px 26px}
  .footer-links{gap:12px;font-size:9px}
}
@media(prefers-reduced-motion:reduce){
  .hero-logo,.hero h1,.lead{animation:none!important;opacity:1!important;transform:none!important}
}