:root{--w:#fff;--k:#000;--g1:#f4f4f4;--g2:#d9d9d9;--g3:#6b6b6b;--g4:#a8a8a8;
--f:"Bricolage Grotesque","Helvetica Neue",Arial,sans-serif;--m:"IBM Plex Mono",ui-monospace,Consolas,monospace;
box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px);color-scheme:light}
html{scroll-padding-top:env(safe-area-inset-top,0px);scroll-behavior:smooth}
*,*::before,*::after{box-sizing:inherit}
body{margin:0;background:var(--w);color:var(--k);font:400 18px/1.6 var(--f)}
a{color:inherit}
:focus-visible{outline:3px solid var(--k);outline-offset:3px}
.dark :focus-visible{outline-color:var(--w)}
.wrap{max-width:1160px;margin:0 auto;padding:0 28px}
header.top{display:flex;justify-content:space-between;align-items:center;padding:22px 0}
.logo{font-weight:800;font-size:22px;letter-spacing:-.02em;text-decoration:none;display:flex;align-items:center;gap:10px}
.logo i{width:26px;height:26px;border-radius:50%;background:var(--k);display:inline-block;position:relative}
.logo i::after{content:"";position:absolute;inset:7px;border-radius:50%;background:var(--w)}
nav a{margin-left:26px;text-decoration:none;font-size:16px;color:var(--g3)}
nav a:hover{color:var(--k)}
.btn{display:inline-block;background:var(--k);color:var(--w);font:700 18px/1 var(--f);padding:18px 30px;border-radius:999px;text-decoration:none;border:2px solid var(--k);transition:background .15s,color .15s}
.btn:hover{background:var(--w);color:var(--k)}
.btn.inv{background:var(--w);color:var(--k);border-color:var(--w)}
.btn.inv:hover{background:var(--k);color:var(--w)}
.btn.ghost{background:transparent;color:var(--k)}
.btn.ghost:hover{background:var(--k);color:var(--w)}
.note{font-size:15px;color:var(--g3);margin:16px 0 0}
/* hero */
.hero{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center;padding:56px 0 96px}
h1{font-size:clamp(46px,7vw,92px);line-height:.95;letter-spacing:-.045em;font-weight:800;margin:0 0 26px}
.lead{font-size:21px;max-width:30em;color:#222;margin:0 0 34px}
.cta{display:flex;gap:14px;flex-wrap:wrap}
.demo{background:var(--k);color:var(--w);border-radius:18px;padding:22px 22px 26px;font:400 14.5px/1.55 var(--m);min-height:430px}
.demo .bar{display:flex;gap:7px;margin-bottom:20px}
.demo .bar b{width:11px;height:11px;border-radius:50%;border:1.5px solid var(--g3)}
.demo .goal{font:500 18px/1.4 var(--f);margin:0 0 22px;padding-bottom:18px;border-bottom:1px solid #333}
.demo .goal span{color:var(--g4);font-weight:400}
.demo ul{list-style:none;margin:0;padding:0}
.demo li{display:flex;gap:12px;padding:7px 0;opacity:0;transform:translateY(6px);transition:opacity .4s,transform .4s}
.demo li.on{opacity:1;transform:none}
.demo li em{font-style:normal;color:var(--g4);min-width:76px}
.demo li.done::before{content:"✓";color:var(--w);order:-1}
.demo li:not(.done)::before{content:"•";color:var(--g3);order:-1}
.demo .fin{margin-top:16px;padding-top:16px;border-top:1px solid #333;font:500 16px/1.4 var(--f)}
/* sections */
section{padding:96px 0}
h2{font-size:clamp(34px,4.6vw,60px);line-height:1.02;letter-spacing:-.035em;font-weight:800;margin:0 0 22px;max-width:15em}
.sub{font-size:20px;color:#333;max-width:36em;margin:0 0 56px}
.what{background:var(--g1)}
.what .cols{display:grid;grid-template-columns:1fr 1fr;gap:56px}
.what p{margin:0 0 18px;max-width:34em}
.facts{border-top:2px solid var(--k)}
.facts div{display:flex;justify-content:space-between;gap:20px;padding:15px 0;border-bottom:1px solid var(--g2)}
.facts dt{color:var(--g3)}
.facts dd{margin:0;font-weight:700;text-align:right}
dl.facts{margin:0}
.ben{border-top:2px solid var(--k)}
.ben article{display:grid;grid-template-columns:.9fr 1.4fr;gap:40px;padding:34px 0;border-bottom:1px solid var(--g2)}
.ben h3{font-size:26px;line-height:1.15;letter-spacing:-.02em;margin:0}
.ben p{margin:0 0 12px;max-width:36em;color:#222}
.ben p:last-child{margin:0}
.modes{background:var(--k);color:var(--w)}
.modes .sub{color:var(--g2)}
.modes dl{margin:0;border-top:1px solid #444}
.modes dl div{display:grid;grid-template-columns:.7fr 1.6fr;gap:40px;padding:26px 0;border-bottom:1px solid #444}
.modes dt{font-size:28px;font-weight:700;letter-spacing:-.02em}
.modes dd{margin:0;color:var(--g2);max-width:38em}
.who{display:grid;grid-template-columns:repeat(2,1fr);gap:0 56px}
.who div{padding:26px 0;border-top:1px solid var(--g2)}
.who h3{margin:0 0 6px;font-size:22px;letter-spacing:-.01em}
.who p{margin:0;color:#333}
.steps{counter-reset:s;list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.steps li{counter-increment:s;border-top:4px solid var(--k);padding-top:18px}
.steps li::before{content:counter(s);display:block;font-size:56px;font-weight:800;line-height:1;margin-bottom:12px;letter-spacing:-.04em}
.steps h3{margin:0 0 8px;font-size:24px}
.steps p{margin:0;color:#333}
.gray{background:var(--g1)}
details{border-top:1px solid var(--g2);padding:22px 0}
details:last-of-type{border-bottom:1px solid var(--g2)}
summary{font-size:22px;font-weight:700;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:20px;letter-spacing:-.01em}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";font-weight:400;font-size:30px;line-height:1}
details[open] summary::after{content:"–"}
details p{margin:14px 0 0;max-width:42em;color:#222}
.final{background:var(--k);color:var(--w);text-align:left}
.final h2{max-width:12em}
.final p{color:var(--g2);max-width:32em;margin:0 0 34px;font-size:20px}
footer{padding:36px 0;font-size:15px;color:var(--g3)}
footer .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
.table{overflow-x:auto}
@media(max-width:860px){
 .hero,.what .cols,.ben article,.modes dl div,.who,.steps{grid-template-columns:1fr}
 .hero{padding-top:24px;gap:40px}
 .ben article,.modes dl div{gap:10px}
 section{padding:64px 0}
 nav a:not(.keep){display:none}
 .demo{min-height:0}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.demo li{transition:none;opacity:1;transform:none}}