:root{
  --bg:#09090B;--surface:#111114;--surface2:#1B1B20;--line:#1F1F25;--line2:#303038;
  --text:#F5F5F7;--muted:#A1A1AC;--faint:#6E6E7A;--accent:#FFD043;--ink:#09090B;
  --good:#5EE0A0;--warn:#FF8A3D;--bad:#FF4D6A;
  --ui:"Inter","Segoe UI Variable Text","Segoe UI",system-ui,-apple-system,sans-serif;
  --num:var(--ui);--tag:var(--ui);
  --r:10px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{background:var(--bg);color:var(--text);font:16px/1.6 var(--ui);-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:8px}
img,video{max-width:100%;height:auto;display:block}
[hidden]{display:none!important}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.label{font:600 11.5px/1.4 var(--ui);letter-spacing:.08em;text-transform:uppercase;color:var(--faint)}
.label.accent{color:var(--accent)}
.num{font-weight:600;font-variant-numeric:tabular-nums;letter-spacing:-.04em}
h1,h2,h3{font-weight:600;line-height:1.04;letter-spacing:-.035em}
h1{font-size:clamp(44px,7.6vw,104px)}
h2{font-size:clamp(30px,4.4vw,56px)}
h3{font-size:20px;letter-spacing:-.02em;line-height:1.2}
p.lead{font-size:clamp(17px,1.6vw,20px);color:var(--muted);max-width:620px}
.muted{color:var(--muted)}

/* page backdrop: faint grid that fades out */
.grid-bg{position:absolute;inset:0 0 auto 0;height:900px;pointer-events:none;z-index:-1;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:64px 64px;-webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 0%,#000 20%,transparent 75%);mask-image:radial-gradient(ellipse 70% 60% at 50% 0%,#000 20%,transparent 75%);opacity:.7}

/* nav: plain bar, fixed to the top */
.nav-wrap{position:sticky;top:0;z-index:30;background:rgba(9,9,11,.92);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;gap:8px;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font:600 17px var(--ui);letter-spacing:-.02em}
.brand:hover{text-decoration:none}
.nav-links{display:flex;gap:4px;margin-left:36px}
.nav-links a{font:500 14px var(--ui);color:var(--muted);padding:8px 12px;border-radius:6px}
.nav-links a:hover{color:var(--text);background:var(--surface2);text-decoration:none}
.nav .btn{margin-left:auto}
@media (max-width:820px){.nav-links{display:none}}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:8px;font:600 15px var(--ui);padding:13px 24px;border-radius:8px;border:1px solid var(--line2);color:var(--text);background:var(--surface2);cursor:pointer;text-decoration:none!important;transition:background .15s}
.btn:hover{background:#25252B}
.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--ink)}
.btn-primary:hover{background:#FFDD70;border-color:#FFDD70}
.btn-ink{background:var(--ink);border-color:var(--ink);color:var(--text)}
.btn-ink:hover{background:#1B1B20}
.btn-sm{padding:9px 16px;font-size:14px}
.btn-lg{padding:16px 30px;font-size:17px}

/* hero */
.hero{position:relative;padding:76px 0 0;text-align:center}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero p.lead{margin:24px auto 0}
.hero .cta{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:34px}
.hero .note{color:var(--faint);font-size:13.5px;margin-top:16px}
.trace{display:block;width:100%;height:120px;margin-top:38px}
.shot{position:relative;margin:-36px auto 0;max-width:1120px;border:1px solid var(--line2);border-radius:10px;overflow:hidden;background:var(--surface);box-shadow:0 30px 80px -24px rgba(0,0,0,.85)}
.shot-cap{display:flex;justify-content:space-between;gap:16px;padding:10px 16px;border-top:1px solid var(--line)}

/* covers strip */
.strip{padding:64px 0 10px;overflow:hidden}
.strip p{text-align:center;margin-bottom:22px}
.covers{display:flex;gap:14px;width:max-content;animation:slide 48s linear infinite}
.covers:hover{animation-play-state:paused}
.covers img{width:132px;aspect-ratio:2/3;object-fit:cover;border-radius:8px;border:1px solid var(--line2);background:var(--surface2)}
@keyframes slide{to{transform:translateX(-50%)}}
.strip-mask{-webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent)}

section{padding:110px 0}
.sec-head{display:flex;flex-direction:column;gap:14px;margin-bottom:44px;max-width:780px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center;align-items:center}

/* bento */
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.card{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:28px;overflow:hidden;display:flex;flex-direction:column;gap:10px;min-height:300px;transition:border-color .2s,transform .2s}
.card:hover{border-color:var(--line2);transform:translateY(-2px)}
.card p{color:var(--muted);font-size:15px;max-width:440px}
.card .viz{margin-top:auto;padding-top:18px}
.c3{grid-column:span 3}.c2{grid-column:span 2}.c4{grid-column:span 4}
@media (max-width:920px){.c2,.c3,.c4{grid-column:span 6}}
.big{font-size:clamp(64px,8vw,104px);line-height:.9;font-weight:600;letter-spacing:-.05em}
.big small{font-size:.24em;color:var(--muted);letter-spacing:0;font-weight:500;margin-left:6px}
.flow{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}
.flow .from{font-size:44px;font-weight:600;letter-spacing:-.04em;color:var(--faint)}
.flow .arrow{color:var(--faint);font-size:26px}
.delta{color:var(--accent);font-weight:600}
.kv{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:11px 0;border-top:1px solid var(--line);font-size:14.5px}
.kv:first-child{border-top:0}
.kv span:last-child{font-variant-numeric:tabular-nums;white-space:nowrap}
.kv s{color:var(--faint);text-decoration:none}
.kv b{color:var(--accent);font-weight:600}
.gpu{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.chipbox{border:1px solid var(--line2);border-radius:8px;padding:12px 16px;font-weight:600;font-size:15px}
.chipbox.off{color:var(--faint);text-decoration:line-through}
.chipbox.on{border-color:var(--accent);color:var(--accent)}
.demo-tag{position:absolute;top:18px;right:18px;font:600 10.5px var(--ui);letter-spacing:.08em;color:var(--warn);border:1px solid rgba(255,138,61,.5);padding:3px 9px;border-radius:4px}
.gauge{width:100%;max-width:300px}

/* refuses */
.nope{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media (max-width:920px){.nope{grid-template-columns:1fr}}
.nope div{border:1px solid var(--line);border-radius:10px;padding:20px 22px}
.nope b{display:block;font-weight:600;margin-bottom:4px}
.nope b::before{content:"×";color:var(--bad);margin-right:10px;font-weight:700}
.nope span{color:var(--muted);font-size:14.5px}

/* steps */
.cols{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.cols>div{border-top:1px solid var(--line2);padding-top:20px}
.cols .n{font:600 14px var(--ui);color:var(--accent);letter-spacing:.06em;margin-bottom:10px}
.cols p{margin-top:8px}
@media (max-width:860px){.cols{grid-template-columns:1fr}}
.split{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
@media (max-width:860px){.split{grid-template-columns:1fr}}

/* table */
table{width:100%;border-collapse:collapse;font-size:15px}
th{text-align:left;font:600 11.5px var(--ui);letter-spacing:.08em;text-transform:uppercase;color:var(--faint);padding:12px 14px 12px 0;border-bottom:1px solid var(--line)}
td{padding:15px 14px 15px 0;border-bottom:1px solid var(--line);vertical-align:top}
td .tag{font:600 12px var(--ui);padding:3px 10px;border-radius:4px;border:1px solid var(--line2);white-space:nowrap}
.auto{color:var(--accent);border-color:rgba(255,208,67,.45)!important}.guided{color:var(--muted)}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);padding:8px 24px;background:var(--surface)}
tr:last-child td{border-bottom:0}

/* demo */
.demo{border:1px solid var(--line2);border-radius:var(--r);background:var(--surface);overflow:hidden}
.demo-top{display:flex;justify-content:space-between;align-items:center;padding:14px 22px;border-bottom:1px solid var(--line)}
.demo-flag{font:600 11px var(--ui);letter-spacing:.07em;color:var(--warn);border:1px solid var(--warn);padding:3px 10px;border-radius:4px}
.demo-body{padding:26px 22px}
.games{display:flex;flex-wrap:wrap;gap:14px}
.game{position:relative;width:132px;aspect-ratio:2/3;border-radius:8px;border:2px solid transparent;cursor:pointer;overflow:hidden;color:var(--text);padding:0;background:var(--surface2);opacity:.55;transition:opacity .15s,transform .15s}
.game:hover{opacity:.85}
.game[aria-pressed="true"]{border-color:var(--accent);opacity:1;transform:translateY(-3px)}
.game svg,.game img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.game span{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}
.seg{display:flex;flex-wrap:wrap;gap:8px;margin:24px 0 4px}
.seg button{font:600 14px var(--ui);color:var(--muted);background:transparent;border:1px solid var(--line2);border-radius:6px;padding:8px 16px;cursor:pointer}
.seg button[aria-pressed="true"]{color:var(--ink);background:var(--accent);border-color:var(--accent)}
.rows{margin-top:18px}
.row{border-top:1px solid var(--line)}
.row-head{display:grid;grid-template-columns:24px 1.3fr 1.4fr 110px;gap:12px;align-items:center;padding:13px 0;width:100%;background:none;border:0;color:inherit;text-align:left;cursor:pointer;font:inherit}
.row-head .idx{font:600 12px var(--ui);color:var(--faint)}
.row-head .val s{color:var(--faint);text-decoration:none}
.row-head .gain{display:flex;align-items:center;justify-content:flex-end;gap:8px;font:600 12px var(--ui)}
.row-head .gain i{display:block;height:6px;border-radius:3px;background:var(--accent)}
.row-body{display:none;grid-template-columns:1fr 1fr;gap:20px;padding:0 0 14px 36px;font-size:14px}
.row.open .row-body{display:grid}
.row-body .label{margin-bottom:2px}
@media (max-width:640px){.row-head{grid-template-columns:20px 1fr 90px}.row-head .val{grid-column:2/4;grid-row:2}.row-body{grid-template-columns:1fr;padding-left:0}.game{width:calc(33.3% - 10px)}}
.demo-foot{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;padding:16px 22px;border-top:1px solid var(--line)}
.steps{list-style:none;margin-top:8px}
.steps li{display:flex;gap:12px;align-items:center;padding:8px 0;color:var(--faint)}
.steps li.done{color:var(--text)}
.steps li .box{width:20px;height:20px;border:1.5px solid var(--line2);border-radius:6px;display:grid;place-items:center;font-size:12px;color:var(--ink)}
.steps li.done .box{background:var(--accent);border-color:var(--accent)}
.result{display:none}
.result.show{display:block}
.bignums{display:flex;flex-wrap:wrap;align-items:flex-end;gap:16px 28px}
.bignums .before{font:600 56px/1 var(--ui);color:var(--faint)}
.bignums .after{font:600 96px/.9 var(--ui)}
.bignums .delta{font:600 22px var(--ui);color:var(--accent);padding-bottom:6px}
.chart{width:100%;height:180px;margin-top:18px}
.legend{display:flex;gap:18px;margin-top:10px;flex-wrap:wrap}
.legend i{display:inline-block;width:16px;height:2px;vertical-align:middle;margin-right:6px}

/* faq */
.faq{max-width:820px;margin:0 auto}
details{border:1px solid var(--line);border-radius:10px;padding:18px 22px;margin-bottom:10px;background:var(--surface)}
details summary{cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:16px}
details summary::-webkit-details-marker{display:none}
details summary::after{content:"+";font:500 20px var(--ui);color:var(--faint)}
details[open] summary::after{content:"–"}
details p{color:var(--muted);margin-top:10px}

/* download: one loud block */
.get{background:var(--accent);color:var(--ink);border-radius:14px;padding:clamp(36px,6vw,72px);display:flex;flex-wrap:wrap;gap:28px;align-items:center;justify-content:space-between}
.get h2{font-size:clamp(34px,5vw,64px)}
.get p{max-width:460px;margin-top:10px;color:#3a2f08;font-weight:500}
.get a:not(.btn){color:var(--ink);text-decoration:underline}
.footer{padding:36px 0 48px;color:var(--faint);font-size:14px}
.footer .wrap{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center}
.footer a{color:var(--muted)}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* guides and text pages */
.article{max-width:760px;padding:72px 24px 80px;margin:0 auto}
.article h1{font-size:clamp(34px,5vw,54px);margin:10px 0 18px;line-height:1.08}
.article h2{font-size:26px;margin:40px 0 12px;line-height:1.15}
.article p,.article li{color:#D4D4DA;margin-bottom:14px}
.article ul,.article ol{padding-left:22px}
.article code{background:var(--surface2);padding:1px 6px;border-radius:6px;font-size:.92em}
.article kbd{background:var(--surface2);border:1px solid var(--line2);border-radius:6px;padding:1px 6px;font:500 .88em var(--ui)}
.cta-box{display:grid;grid-template-columns:auto 1fr auto;gap:20px;align-items:center;border:1px solid var(--line2);border-radius:var(--r);background:var(--surface);padding:24px;margin-top:44px}
.cta-box h2{font-size:20px;margin:0 0 4px}.cta-box p{margin:0;color:var(--muted);font-size:15px}
@media (max-width:640px){.cta-box{grid-template-columns:1fr}}
.guide-list{list-style:none;padding:0!important}
.guide-list li{border:1px solid var(--line);border-radius:10px;padding:18px 22px;margin-bottom:10px;background:var(--surface)}
.guide-list a{font-size:18px;font-weight:600;color:var(--text)}
.guide-list p{color:var(--muted);margin:4px 0 0}