:root{--porcelain:#FAFAF8;--paper:#FFFFFF;--graphite:#15171C;--slate:#5B6169;--ultra:#2440D8;--ultra-tint:#EFF1FD;--hairline:#E4E5E1;--m:'Spline Sans Mono',monospace;--a:'Archivo',sans-serif}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--porcelain);color:var(--graphite);font-family:var(--a);font-weight:340;line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:1240px;margin:0 auto;padding:0 32px}
.mono{font-family:var(--m);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase}
.crumbs{border-bottom:1px solid var(--hairline);background:var(--paper)}
.crumbs .wrap{padding-top:10px;padding-bottom:10px;font-size:.8rem;color:var(--slate)}
.crumbs a:hover{color:var(--graphite)}
.crumbs span{margin:0 6px;color:var(--hairline)}
.crumbs b{font-weight:520;color:var(--graphite)}
header{position:sticky;top:0;background:rgba(250,250,248,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--hairline);z-index:50}
.bar{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:12px}
.brand b{font-weight:640;font-size:1.02rem;letter-spacing:-.01em;display:block;line-height:1.1}
.brand small{display:block;font-family:var(--m);font-size:.6rem;letter-spacing:.18em;text-transform:uppercase;color:var(--slate)}
nav{display:flex;gap:28px;align-items:center}
nav a{font-size:.88rem;font-weight:460;color:var(--slate);transition:color .15s}
nav a:hover,nav a.on{color:var(--graphite)}
nav a.on{font-weight:560}
.btn{display:inline-block;background:var(--ultra);color:#fff;padding:.62rem 1.4rem;font-weight:560;font-size:.88rem;transition:background .15s;border:0;cursor:pointer;font-family:var(--a)}
.btn:hover{background:#1B33B8}
.btn.ghost{background:transparent;color:var(--graphite);border:1px solid var(--graphite)}
.btn.ghost:hover{background:var(--graphite);color:#fff}
.btn.inv{background:#fff;color:var(--graphite)}
.btn.inv:hover{background:var(--ultra);color:#fff}
/* hero */
.hero{padding:96px 0 64px}
.hero .mono{color:var(--ultra);display:flex;align-items:center;gap:14px;margin-bottom:24px}
.hero .mono::before{content:"";width:34px;height:1px;background:var(--ultra)}
.hero h1{font-size:clamp(2.7rem,5.8vw,4.6rem);line-height:1.02;font-weight:620;letter-spacing:-.033em;max-width:21ch}
.hero h1 em{font-style:normal;color:var(--ultra)}
.hero .tag{margin-top:26px;font-size:clamp(1.35rem,2.4vw,1.9rem);font-weight:620;letter-spacing:-.02em;display:inline-flex;align-items:center;gap:16px}
.hero .tag::after{content:"";width:52px;height:2px;background:var(--ultra)}
.hero p.lede{margin-top:22px;font-size:1.12rem;color:var(--slate);max-width:58ch;font-weight:360}
.hero .cta{margin-top:38px;display:flex;gap:14px;flex-wrap:wrap}
/* fact strip */
.facts{border-top:1px solid var(--hairline);border-bottom:1px solid var(--hairline);background:var(--paper)}
.facts .wrap{display:grid;grid-template-columns:repeat(4,1fr)}
.fact{padding:22px 24px 22px 0;border-right:1px solid var(--hairline)}
.fact:last-child{border-right:0}
.fact + .fact{padding-left:24px}
.fact .mono{color:var(--slate);margin-bottom:4px}
.fact div{font-weight:520;font-size:.95rem}
/* section heads */
.sec{padding:84px 0}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:38px}
.sec-head h2{font-size:1.9rem;font-weight:600;letter-spacing:-.02em}
.sec-head .mono{color:var(--slate)}
/* split pillars */
.split{display:flex;height:500px;border-top:1px solid var(--graphite);border-bottom:1px solid var(--hairline)}
.col{flex:1;border-right:1px solid var(--hairline);padding:38px 34px;display:flex;flex-direction:column;justify-content:space-between;transition:flex .45s cubic-bezier(.6,.05,.2,1),background .3s,color .3s;cursor:pointer;overflow:hidden;background:var(--paper)}
.col:last-child{border-right:0}
.col:hover{flex:2.1;background:var(--graphite);color:#fff}
.col .code{font-family:var(--m);font-size:.72rem;letter-spacing:.16em;color:var(--ultra);transition:color .3s}
.col:hover .code{color:#8FA0F5}
.col h3{font-size:clamp(1.4rem,2.4vw,2rem);font-weight:600;letter-spacing:-.02em;margin-top:14px;line-height:1.08}
.col .desc{font-size:.93rem;color:var(--slate);margin-top:14px;max-width:38ch;transition:color .3s}
.col:hover .desc{color:#A9AEB8}
.col ul{list-style:none;margin-top:auto;opacity:0;transform:translateY(12px);transition:opacity .35s .12s,transform .35s .12s}
.col:hover ul{opacity:1;transform:none}
.col li{display:flex;gap:12px;padding:7px 0;border-bottom:1px solid #2B2E36;font-size:.89rem;align-items:baseline}
.col li:last-child{border-bottom:0}
.col li span:first-child{font-family:var(--m);font-size:.66rem;letter-spacing:.1em;color:#8FA0F5}
.col .footrow{display:flex;justify-content:space-between;align-items:center;margin-top:20px}
.col .footrow .go{font-weight:540;font-size:.9rem}
.col .footrow .num{font-family:var(--m);font-size:2.4rem;color:var(--hairline);line-height:1;transition:color .3s}
.col:hover .footrow .num{color:#2B2E36}
/* coverage index */
.igroup{border-top:1px solid var(--graphite)}
.igroup + .igroup{margin-top:52px}
.igrid{display:grid;grid-template-columns:280px 1fr}
.igrid .lab .mono{color:var(--ultra);padding-top:22px;display:block}
.igrid .lab h3{font-size:1.25rem;font-weight:600;margin-top:6px;line-height:1.2}
.rows{grid-column:2}
.row{display:grid;grid-template-columns:88px 1fr auto;align-items:center;padding:15px 12px 15px 0;border-bottom:1px solid var(--hairline);transition:background .15s,padding .15s;cursor:pointer}
.row:hover{background:var(--ultra-tint);padding-left:14px}
.row .n{font-family:var(--m);font-size:.74rem;letter-spacing:.1em;color:var(--slate)}
.row:hover .n{color:var(--ultra)}
.row .t{font-size:1.02rem;font-weight:470}
.row .arr{opacity:0;transform:translateX(-6px);transition:all .15s;color:var(--ultra)}
.row:hover .arr{opacity:1;transform:none}
/* process strip */
.process .wrap{display:grid;grid-template-columns:repeat(4,1fr);border-left:1px solid var(--hairline)}
.step{padding:8px 28px 8px 24px;border-right:1px solid var(--hairline)}
.step .mono{color:var(--ultra);margin-bottom:12px}
.step h4{font-size:1.05rem;font-weight:600;margin-bottom:8px}
.step p{font-size:.88rem;color:var(--slate)}
/* dark band */
.band{background:var(--graphite);color:#fff;padding:88px 0}
.band .grid2{display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center}
.band .mono{color:#8FA0F5;margin-bottom:18px}
.band h2{font-size:2.4rem;font-weight:600;letter-spacing:-.025em;line-height:1.08}
.band h2 em{font-style:normal;color:#8FA0F5}
.band p{margin-top:18px;color:#A9AEB8;font-size:1rem;max-width:46ch}
.meta{border:1px solid #2B2E36}
.meta .r{display:grid;grid-template-columns:180px 1fr;padding:15px 24px;border-bottom:1px solid #2B2E36;font-size:.92rem}
.meta .r:last-child{border-bottom:0}
.meta .r span:first-child{font-family:var(--m);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:#8FA0F5;padding-top:3px}
/* prose / hub article */
.prose{max-width:76ch}
.prose h2{font-size:1.7rem;font-weight:600;letter-spacing:-.02em;margin:56px 0 18px}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:1.22rem;font-weight:600;margin:38px 0 12px}
.prose p{color:var(--slate);font-size:1.02rem;margin-bottom:18px}
.prose p b,.prose li b{color:var(--graphite);font-weight:560}
.prose ul{margin:0 0 18px 1.2rem;color:var(--slate)}
.prose li{margin-bottom:8px;font-size:1.02rem}
.hubgrid{display:grid;grid-template-columns:1fr 320px;gap:72px;align-items:start}
.side{position:sticky;top:96px}
.side .panel{border:1px solid var(--hairline);background:var(--paper)}
.side .panel .r{display:grid;grid-template-columns:86px 1fr;padding:13px 20px;border-bottom:1px solid var(--hairline);font-size:.88rem}
.side .panel .r:last-child{border-bottom:0}
.side .panel .r span:first-child{font-family:var(--m);font-size:.66rem;letter-spacing:.12em;text-transform:uppercase;color:var(--ultra);padding-top:3px}
.spec .r span:last-child,.meta .r span:last-child{overflow-wrap:anywhere}
.side .panel .r span:last-child{font-size:.84rem;overflow-wrap:anywhere}
.side .panel .r span.nb{font-size:.8rem;white-space:nowrap}
@media(max-width:1100px){.side .panel .r span.nb{white-space:normal;overflow-wrap:anywhere}}
.side .cta{margin-top:20px;display:grid;gap:10px}
.side .cta .btn{text-align:center}
/* class blocks */
.klass{border-top:1px solid var(--graphite);padding:34px 0 8px;margin-top:44px}
.klass .kcode{font-family:var(--m);font-size:.72rem;letter-spacing:.16em;color:var(--ultra)}
.klass h3{font-size:1.45rem;font-weight:600;letter-spacing:-.015em;margin:10px 0 14px}
/* book panel */
.book{border:1px solid var(--graphite);background:var(--paper);display:grid;grid-template-columns:170px 1fr;gap:36px;padding:36px;margin:56px 0;align-items:center}
.book img.cover{width:100%;height:auto;display:block;border:1px solid var(--hairline)}
.lang{font-family:var(--m);font-size:.7rem;letter-spacing:.14em;border:1px solid var(--hairline);padding:.42rem .7rem;color:var(--slate)}
.lang:hover{border-color:var(--graphite);color:var(--graphite)}
input[type=file]{padding:.55rem;background:var(--paper)}
.hint{font-size:.78rem;color:var(--slate);margin-top:6px}
.book h3{font-size:1.35rem;font-weight:600;letter-spacing:-.015em}
.book p{color:var(--slate);font-size:.98rem;margin-top:12px;max-width:52ch}
.book .mono.by{color:var(--ultra);margin-bottom:8px}
/* faq */
.faq details{border-bottom:1px solid var(--hairline)}
.faq details:first-of-type{border-top:1px solid var(--graphite)}
.faq summary{cursor:pointer;padding:20px 8px 20px 0;font-weight:540;font-size:1.05rem;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-family:var(--m);color:var(--ultra);font-size:1.2rem}
.faq details[open] summary::after{content:"−"}
.faq details p{color:var(--slate);padding:0 0 22px;max-width:70ch}
/* forms */
.form{border:1px solid var(--hairline);background:var(--paper);padding:40px}
.fgrid{display:grid;grid-template-columns:1fr 1fr;gap:20px 24px}
.fgrid .full{grid-column:1/-1}
label{display:block;font-family:var(--m);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--slate);margin-bottom:7px}
input,select,textarea{width:100%;border:1px solid var(--hairline);background:var(--porcelain);padding:.75rem .9rem;font-family:var(--a);font-size:.95rem;color:var(--graphite)}
input:focus,select:focus,textarea:focus{outline:2px solid var(--ultra);outline-offset:-1px}
/* checklist */
.check{border:1px solid var(--hairline);background:var(--paper);margin-top:28px}
.check .h{padding:16px 24px;border-bottom:1px solid var(--hairline);font-weight:600}
.check ul{list-style:none}
.check li{display:flex;gap:14px;padding:12px 24px;border-bottom:1px solid var(--hairline);font-size:.94rem;color:var(--slate)}
.check li:last-child{border-bottom:0}
.check li::before{content:"—";color:var(--ultra);font-family:var(--m)}
/* about */
.grid2a{display:grid;grid-template-columns:1.15fr .85fr;gap:64px;align-items:start}
.spec{border:1px solid var(--hairline);background:var(--paper)}
.spec .r{display:grid;grid-template-columns:170px 1fr;padding:15px 24px;border-bottom:1px solid var(--hairline);font-size:.92rem}
.spec .r:last-child{border-bottom:0}
.spec .r span:first-child{font-family:var(--m);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;color:var(--ultra);padding-top:3px}
.lead{background:var(--graphite);color:#fff;padding:96px 0}
.lead .mono{color:#8FA0F5;margin-bottom:20px;display:flex;align-items:center;gap:14px}
.lead .mono::before{content:"";width:34px;height:1px;background:#8FA0F5}
.lead .grid{display:grid;grid-template-columns:380px 1fr;gap:72px;align-items:start}
.portrait{aspect-ratio:4/5;border:1px solid #2B2E36;overflow:hidden}
.portrait img{width:100%;height:100%;object-fit:cover;display:block;filter:saturate(.96)}
.lead h2{font-size:clamp(2rem,4vw,3rem);font-weight:620;letter-spacing:-.03em;line-height:1.04}
.lead .title{font-family:var(--m);font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;color:#8FA0F5;margin-top:14px}
.lead .bio p{margin-top:22px;color:#A9AEB8;font-size:1.02rem;max-width:56ch}
.lead .bio p b{color:#fff;font-weight:560}
.creds{display:flex;margin-top:34px;border:1px solid #2B2E36;flex-wrap:wrap}
.cred{padding:18px 26px;border-right:1px solid #2B2E36;flex:1;min-width:180px}
.cred:last-child{border-right:0}
.cred .mono{color:#5B6169;margin:0 0 6px}
.cred .mono::before{display:none}
.cred div{font-weight:540;font-size:.95rem}
.lk{display:inline-flex;align-items:center;gap:10px;margin-top:34px;font-weight:540;font-size:.92rem;color:#fff;border:1px solid #2B2E36;padding:.7rem 1.3rem;transition:background .15s,border-color .15s}
.lk:hover{background:var(--ultra);border-color:var(--ultra)}
.lk svg{width:16px;height:16px}
.gcells{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--hairline);background:var(--paper)}
.gcell{padding:34px 30px;border-right:1px solid var(--hairline)}
.gcell:last-child{border-right:0}
.gcell .mono{color:var(--ultra);margin-bottom:12px}
.gcell h4{font-size:1.15rem;font-weight:600;margin-bottom:8px}
.gcell p{font-size:.9rem;color:var(--slate)}
/* footer */
footer{padding:72px 0 40px;border-top:1px solid var(--hairline)}
.fcols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:48px}
footer h4{font-size:.86rem;font-weight:620;margin-bottom:16px}
footer .fcols a{display:block;font-size:.88rem;color:var(--slate);padding:4px 0;transition:color .15s}
footer .fcols a:hover{color:var(--graphite)}
.faddr{font-family:var(--m);font-size:.76rem;line-height:2;color:var(--slate);margin-top:14px}
.legal{margin-top:56px;padding-top:24px;border-top:1px solid var(--hairline);display:flex;justify-content:space-between;color:var(--slate);font-size:.8rem;gap:20px;flex-wrap:wrap}
@media(max-width:900px){
 nav{display:none}
 .facts .wrap{grid-template-columns:1fr 1fr}
 .fact{border-right:0;padding-left:0!important}
 .split{flex-direction:column;height:auto}
 .col{border-right:0;border-bottom:1px solid var(--hairline);min-height:200px}
 .col:hover{flex:1}
 .col ul{display:none}
 .igrid{grid-template-columns:1fr}
 .rows{grid-column:1}
 .process .wrap{grid-template-columns:1fr 1fr;row-gap:36px}
 .band .grid2,.grid2a,.lead .grid,.hubgrid{grid-template-columns:1fr}
 .side{position:static}
 .fcols{grid-template-columns:1fr 1fr}
 .fgrid{grid-template-columns:1fr}
 .book{grid-template-columns:1fr;max-width:420px}
 .gcells{grid-template-columns:1fr}
 .gcell{border-right:0;border-bottom:1px solid var(--hairline)}
 .portrait{max-width:340px}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}