:root{
 --bg:#12161b;--bg2:#0e1114;--panel:#1a1f27;--panel2:#222933;--ink:#eef2f7;--ink2:#c7d0da;
 --mut:#93a0ad;--gold:#f0bd54;--gold2:#cf9c32;--goldsoft:rgba(240,189,84,.12);
 --line:#2a323d;--line2:#333c48;--rad:16px;--radlg:22px;--maxw:880px;
 --shadow:0 10px 40px -12px rgba(0,0,0,.6);--glow:0 0 0 1px rgba(240,189,84,.25),0 8px 30px -8px rgba(240,189,84,.25);
 --disp:'Sora',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
 --body:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--body);background:var(--bg);color:var(--ink);line-height:1.7;font-size:17px;overflow-x:hidden}
h1,h2,h3,h4,.logo,.btn,.stat b,.eyebrow{font-family:var(--disp)}
a{color:var(--gold);text-decoration:none;transition:color .18s}
a:hover{color:#ffd479}
:focus-visible{outline:2.5px solid var(--gold);outline-offset:3px;border-radius:4px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* scroll progress */
.progress{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--gold),#ffd479);z-index:60;transition:width .1s linear}

/* top strip */
.topbar{background:var(--bg2);border-bottom:1px solid var(--line);font-size:12.5px;color:var(--mut);text-align:center;padding:9px 12px;letter-spacing:.2px}
.topbar b{color:var(--gold);font-weight:600}
.topbar .sep{opacity:.4;margin:0 4px}

/* sticky header */
header.site{position:sticky;top:0;z-index:50;background:rgba(18,22,27,.82);backdrop-filter:saturate(160%) blur(14px);-webkit-backdrop-filter:saturate(160%) blur(14px);border-bottom:1px solid var(--line);transition:box-shadow .25s}
header.site.scrolled{box-shadow:0 6px 24px -12px rgba(0,0,0,.7)}
.hinner{display:flex;align-items:center;justify-content:space-between;padding:13px 22px;max-width:1140px;margin:0 auto;gap:12px}
.logo{font-size:23px;font-weight:800;color:var(--ink);letter-spacing:.3px;display:inline-flex;align-items:center;gap:1px}
.logo i{color:var(--gold);font-style:normal}
.logo .dot{width:7px;height:7px;border-radius:50%;background:var(--gold);margin-left:5px;box-shadow:0 0 12px var(--gold)}
nav.main{display:flex;gap:4px}
nav.main a{color:var(--mut);font-size:14px;font-weight:500;padding:8px 12px;border-radius:9px;transition:background .18s,color .18s}
nav.main a:hover{color:var(--ink);background:var(--panel);text-decoration:none}
.btn{display:inline-flex;align-items:center;gap:7px;background:linear-gradient(135deg,var(--gold),var(--gold2));color:#14181d;font-weight:700;font-size:14.5px;padding:11px 20px;border-radius:999px;transition:transform .15s,box-shadow .2s,filter .2s;box-shadow:0 6px 18px -8px rgba(240,189,84,.55)}
.btn:hover{text-decoration:none;color:#14181d;transform:translateY(-1px);filter:brightness(1.06);box-shadow:var(--glow)}
.btn:active{transform:translateY(0)}
.btn.ghost{background:transparent;color:var(--ink);border:1px solid var(--line2);box-shadow:none}
.btn.ghost:hover{border-color:var(--gold2);background:var(--goldsoft);color:var(--ink)}
.btn svg{width:16px;height:16px}

/* hero */
.hero{position:relative;background:radial-gradient(120% 120% at 50% -10%,#1b222b 0%,#12161b 55%);border-bottom:1px solid var(--line);padding:70px 0 58px;text-align:center;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:44px 44px;opacity:.28;mask-image:radial-gradient(ellipse 70% 60% at 50% 30%,#000 0%,transparent 75%);-webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 30%,#000 0%,transparent 75%)}
.hero>*{position:relative}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:11.5px;letter-spacing:2.5px;color:var(--gold);background:var(--goldsoft);border:1px solid rgba(240,189,84,.3);border-radius:999px;padding:7px 15px;margin-bottom:20px;text-transform:uppercase;font-weight:600}
.eyebrow .pulse{width:7px;height:7px;border-radius:50%;background:var(--gold);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1;box-shadow:0 0 0 0 rgba(240,189,84,.5)}50%{opacity:.7;box-shadow:0 0 0 6px rgba(240,189,84,0)}}
h1{font-size:clamp(31px,5.2vw,47px);line-height:1.1;font-weight:800;letter-spacing:-.5px;margin-bottom:16px;background:linear-gradient(180deg,#fff,#c9d3de);-webkit-background-clip:text;background-clip:text;color:transparent}
.sub{color:var(--ink2);max-width:640px;margin:0 auto 30px;font-size:18.5px}
.cta-row{display:flex;gap:11px;justify-content:center;flex-wrap:wrap}
.stats{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:38px}
.stat{background:linear-gradient(180deg,var(--panel),rgba(26,31,39,.4));border:1px solid var(--line);border-radius:var(--rad);padding:16px 22px;min-width:112px}
.stat b{display:block;font-size:27px;color:var(--gold);font-weight:800;line-height:1}
.stat span{font-size:12.5px;color:var(--mut);margin-top:6px;display:block}

/* breadcrumb */
.crumb{font-size:13px;color:var(--mut);padding:16px 0 4px}
.crumb a{color:var(--mut)}.crumb a:hover{color:var(--gold)}
.crumb .arw{opacity:.4;margin:0 7px}

/* article */
main{padding:8px 0 40px}
article h2{font-size:clamp(22px,3.4vw,29px);margin:50px 0 15px;font-weight:800;letter-spacing:-.3px;scroll-margin-top:80px}
article h3{font-size:19.5px;margin:30px 0 10px;color:var(--gold);font-weight:700}
article p{margin-bottom:16px;color:var(--ink2)}
article ul{margin:0 0 18px 4px;color:var(--ink2);list-style:none}
article ul li{margin-bottom:10px;padding-left:28px;position:relative}
article ul li::before{content:"";position:absolute;left:4px;top:11px;width:8px;height:8px;border-radius:2px;background:var(--gold);transform:rotate(45deg);opacity:.8}
article strong{color:var(--ink)}

/* summary / answer box */
.summary{position:relative;background:linear-gradient(135deg,var(--panel),rgba(34,41,51,.5));border:1px solid var(--line2);border-radius:var(--radlg);padding:24px 26px 24px 30px;margin:28px 0;overflow:hidden}
.summary::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:linear-gradient(180deg,var(--gold),var(--gold2))}
.summary::after{content:"TL;DR";position:absolute;top:16px;right:20px;font-family:var(--disp);font-size:11px;letter-spacing:2px;color:var(--gold);opacity:.55;font-weight:700}
.summary p{margin:0;color:var(--ink)}

/* TOC */
.toc{background:var(--panel);border:1px solid var(--line);border-radius:var(--rad);padding:20px 24px;margin:26px 0}
.toc h4{font-size:12px;letter-spacing:1.5px;text-transform:uppercase;color:var(--mut);margin-bottom:12px;font-weight:700}
.toc ol{list-style:none;counter-reset:toc;display:grid;grid-template-columns:1fr 1fr;gap:6px 24px}
.toc li{counter-increment:toc;font-size:14.5px}
.toc a{color:var(--ink2);display:flex;gap:10px;padding:4px 0}
.toc a::before{content:counter(toc,decimal-leading-zero);color:var(--gold);font-family:var(--disp);font-size:12px;font-weight:700;opacity:.7}
.toc a:hover{color:var(--gold);text-decoration:none}

/* steps */
.steps{counter-reset:s;display:grid;gap:14px;margin:24px 0}
.step{background:linear-gradient(135deg,var(--panel),rgba(26,31,39,.3));border:1px solid var(--line);border-radius:var(--rad);padding:22px 24px 22px 74px;position:relative;transition:border-color .2s,transform .2s}
.step:hover{border-color:var(--gold2);transform:translateX(3px)}
.step::before{counter-increment:s;content:counter(s);position:absolute;left:22px;top:22px;width:38px;height:38px;border-radius:12px;background:linear-gradient(135deg,var(--gold),var(--gold2));color:#14181d;font-family:var(--disp);font-weight:800;font-size:17px;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 14px -4px rgba(240,189,84,.5)}
.step b{display:block;margin-bottom:5px;font-size:17px;color:var(--ink);font-family:var(--disp);font-weight:700}
.step p{margin:0;font-size:15px;color:var(--mut)}

/* license cards */
.lic{display:grid;grid-template-columns:repeat(auto-fit,minmax(235px,1fr));gap:14px;margin:24px 0}
.lcard{background:linear-gradient(135deg,var(--panel),rgba(26,31,39,.3));border:1px solid var(--line);border-radius:var(--rad);padding:24px;transition:border-color .2s,transform .2s}
.lcard:hover{border-color:var(--gold2);transform:translateY(-3px)}
.lcard h3{margin:0 0 8px;font-size:17px}
.lcard p{margin:0;font-size:14.5px;color:var(--mut)}

/* chips */
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0 24px}
.chip{background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:8px 15px;font-size:13.5px;color:var(--ink2);font-weight:500;transition:all .18s}
.chip:hover{border-color:var(--gold2);background:var(--goldsoft);color:var(--ink);text-decoration:none;transform:translateY(-1px)}

/* tables */
.twrap{overflow-x:auto;margin:22px 0;border-radius:var(--rad);border:1px solid var(--line)}
table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:420px}
th,td{padding:13px 16px;text-align:left;border-bottom:1px solid var(--line)}
th{background:var(--panel2);color:var(--gold);font-weight:700;font-family:var(--disp);font-size:13px;letter-spacing:.3px;position:sticky;top:0}
td{background:var(--panel);color:var(--ink2)}
tr:last-child td{border-bottom:none}
tbody tr{transition:background .15s}
tbody tr:hover td{background:var(--panel2)}
.note{font-size:13.5px;color:var(--mut);font-style:italic;margin:-8px 0 22px}

/* FAQ */
.faq details{background:var(--panel);border:1px solid var(--line);border-radius:var(--rad);margin-bottom:11px;overflow:hidden;transition:border-color .2s}
.faq details[open]{border-color:var(--gold2)}
.faq summary{padding:18px 22px;font-weight:600;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:14px;font-size:16px;color:var(--ink);font-family:var(--disp)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--gold);font-size:24px;font-weight:400;transition:transform .25s;flex-shrink:0}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .a{padding:0 22px 18px;color:var(--mut);font-size:15px}

/* related cards */
.related{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:13px;margin:24px 0}
.rcard{background:linear-gradient(135deg,var(--panel),rgba(26,31,39,.3));border:1px solid var(--line);border-radius:var(--rad);padding:18px 20px;display:block;transition:border-color .2s,transform .2s}
.rcard:hover{border-color:var(--gold2);text-decoration:none;transform:translateY(-3px)}
.rcard b{display:block;color:var(--ink);margin-bottom:5px;font-family:var(--disp);font-weight:700;font-size:15.5px}
.rcard span{font-size:13px;color:var(--mut)}

/* CTA band */
.cta-band{position:relative;background:linear-gradient(135deg,#1e2530,#2a3340);border:1px solid var(--gold2);border-radius:var(--radlg);padding:40px 30px;text-align:center;margin:52px 0 24px;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--line2) 1px,transparent 1px),linear-gradient(90deg,var(--line2) 1px,transparent 1px);background-size:34px 34px;opacity:.2;mask-image:radial-gradient(ellipse 60% 80% at 50% 50%,#000,transparent 70%);-webkit-mask-image:radial-gradient(ellipse 60% 80% at 50% 50%,#000,transparent 70%)}
.cta-band>*{position:relative}
.cta-band h2{margin:0 0 9px;font-size:26px}
.cta-band p{color:var(--ink2);margin-bottom:22px;max-width:520px;margin-left:auto;margin-right:auto}

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

/* back to top */
.totop{position:fixed;right:22px;bottom:22px;width:46px;height:46px;border-radius:14px;background:linear-gradient(135deg,var(--gold),var(--gold2));color:#14181d;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:opacity .25s,transform .25s;z-index:40;border:none;cursor:pointer}
.totop.show{opacity:1;pointer-events:auto}
.totop:hover{transform:translateY(-3px)}
.totop svg{width:20px;height:20px}

/* footer */
footer{border-top:1px solid var(--line);padding:44px 22px 30px;color:var(--mut);font-size:13.5px;background:var(--bg2)}
.fgrid{max-width:1140px;margin:0 auto;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
footer h4{color:var(--ink);font-size:14px;margin-bottom:12px;font-family:var(--disp);font-weight:700}
footer p{margin-bottom:12px;line-height:1.6}
footer a{color:var(--mut);display:block;margin-bottom:8px}
footer a:hover{color:var(--gold)}
.fcontact a{color:var(--ink2);font-weight:500}
.fbottom{max-width:1140px;margin:30px auto 0;padding-top:20px;border-top:1px solid var(--line);text-align:center;font-size:12.5px;color:var(--mut)}
.badges{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:14px}
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--ink2);background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:6px 13px}
.badge svg{width:13px;height:13px;color:var(--gold)}

@media(max-width:820px){.fgrid{grid-template-columns:1fr 1fr}.toc ol{grid-template-columns:1fr}}
@media(max-width:680px){nav.main{display:none}.hinner{padding:12px 16px}.hero{padding:52px 0 44px}.stat{min-width:96px;padding:13px 16px}.cta-row .btn.ghost:last-child{display:none}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}html{scroll-behavior:auto}}