:root{--bg:#07111F;--bg2:#0B1728;--card:#101E31;--elev:#14243A;--text:#F3F6FC;--text2:#A0AEC0;--muted:#8393A8;--accent:#65BFFF;--border:rgba(148,170,200,.14);--r:12px;--font:'Manrope',system-ui,-apple-system,'Segoe UI',sans-serif}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 var(--font);-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column;
 background-image:radial-gradient(900px 420px at 50% -80px,rgba(101,191,255,.09),transparent 70%),linear-gradient(180deg,var(--bg),var(--bg2) 100%);background-repeat:no-repeat}
main{flex:1;outline:none}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}
.skip{position:absolute;left:-999px;top:8px;background:var(--elev);padding:8px 12px;border-radius:8px;z-index:100}.skip:focus{left:8px}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.progress{position:fixed;top:0;left:0;height:2px;width:0;background:var(--accent);z-index:60}
/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(7,17,31,.72);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid transparent;transition:border-color .2s}
.nav.scrolled{border-color:var(--border)}
.nav-in{max-width:1120px;margin:0 auto;padding:0 20px;height:60px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:9px;color:var(--text);font-weight:800;font-size:19px;letter-spacing:-.02em}.brand:hover{text-decoration:none}
.links{display:flex;gap:4px;flex:1}
.links a{color:var(--text2);padding:7px 12px;border-radius:8px;font-weight:600;font-size:14.5px}
.links a:hover,.links a.on{color:var(--text);background:rgba(148,170,200,.08);text-decoration:none}
.nav-r{display:flex;align-items:center;gap:8px;position:relative}
.icon-btn{background:none;border:0;color:var(--text2);width:40px;height:40px;border-radius:10px;display:grid;place-items:center;cursor:pointer}
.icon-btn:hover{background:rgba(148,170,200,.08);color:var(--text)}
.menu-btn{display:none}
.btn{display:inline-flex;align-items:center;gap:8px;padding:9px 16px;border-radius:10px;border:1px solid var(--border);background:var(--elev);color:var(--text);font:600 14px var(--font);cursor:pointer;min-height:40px}
.btn:hover{text-decoration:none;border-color:rgba(101,191,255,.4)}
.btn[aria-disabled=true]{opacity:.5;cursor:not-allowed}
.avatar{width:32px;height:32px;border-radius:50%;background:var(--elev);object-fit:cover}
.user-btn{background:none;border:0;cursor:pointer;padding:4px;border-radius:50%}
.menu{position:absolute;right:0;top:48px;min-width:200px;background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:6px}
.menu .who{padding:8px 10px;color:var(--text2);font-size:13.5px;border-bottom:1px solid var(--border);margin-bottom:4px}
.menu button{width:100%;text-align:left;background:none;border:0;color:var(--text);padding:9px 10px;border-radius:8px;font:600 14px var(--font);cursor:pointer}
.menu button:hover{background:rgba(148,170,200,.08)}
/* hero */
.hero{padding:84px 0 56px;max-width:760px}
.hero h1{font-size:clamp(34px,6vw,56px);line-height:1.08;letter-spacing:-.035em;margin:0 0 16px;font-weight:800}
.hero p{color:var(--text2);font-size:18px;margin:0 0 28px;max-width:56ch}
.searchbar{display:flex;gap:8px;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:6px;max-width:620px}
.searchbar:focus-within{border-color:rgba(101,191,255,.5)}
.searchbar input{flex:1;min-width:0;background:none;border:0;color:var(--text);font:500 16px var(--font);padding:10px 12px;outline:none}
.searchbar button{background:var(--accent);color:#04101D;border:0;border-radius:10px;padding:0 18px;font:700 14px var(--font);cursor:pointer}
/* sections */
.sec{padding:36px 0}
.sec-h{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:18px}
.sec-h h2{margin:0;font-size:22px;letter-spacing:-.02em}
.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}
.card{display:block;background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:18px;color:var(--text);transition:border-color .2s,background .2s}
.card:hover{border-color:rgba(101,191,255,.35);background:var(--elev);text-decoration:none}
.card h3{margin:0 0 4px;font-size:17px;letter-spacing:-.01em}
.card p{margin:0;color:var(--text2);font-size:14.5px}
.meta{color:var(--muted);font-size:13px}
.list{display:flex;flex-direction:column;gap:10px}
.row{display:flex;gap:14px;justify-content:space-between;align-items:flex-start}
.chip{display:inline-block;background:rgba(101,191,255,.1);color:var(--accent);border-radius:6px;padding:1px 8px;font-size:12.5px;font-weight:600}
.empty{border:1px dashed var(--border);border-radius:var(--r);padding:28px;color:var(--text2);text-align:center}
.empty strong{display:block;color:var(--text);margin-bottom:4px}
.page-h{padding:44px 0 12px}
.page-h h1{margin:0 0 8px;font-size:clamp(28px,4vw,38px);letter-spacing:-.03em}
.page-h p{margin:0;color:var(--text2);max-width:62ch}
.crumbs{font-size:13.5px;color:var(--muted);margin-bottom:12px}
.filter{background:var(--card);border:1px solid var(--border);border-radius:10px;color:var(--text);font:500 15px var(--font);padding:10px 14px;width:100%;max-width:360px;margin:14px 0 18px}
.pager{display:flex;gap:10px;justify-content:center;margin-top:22px}
.tags{display:flex;flex-wrap:wrap;gap:8px}
.pill{background:var(--card);border:1px solid var(--border);border-radius:999px;padding:5px 13px;color:var(--text2);font-size:14px;font-weight:600}
.pill:hover{color:var(--text);text-decoration:none;border-color:rgba(101,191,255,.35)}
.skel{height:84px;border-radius:var(--r);background:linear-gradient(90deg,var(--card),var(--elev),var(--card));background-size:200% 100%;animation:sh 1.4s infinite}
@keyframes sh{to{background-position:-200% 0}}
/* article */
.art-wrap{max-width:1120px;margin:0 auto;padding:36px 20px 20px;display:grid;grid-template-columns:minmax(0,1fr) 230px;gap:56px}
.art{max-width:720px;min-width:0}
.art h1{font-size:clamp(30px,4.5vw,42px);line-height:1.15;letter-spacing:-.03em;margin:0 0 10px}
.art .lead{color:var(--text2);font-size:18px;margin:0 0 20px}
.byline{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding:14px 0;border-block:1px solid var(--border);margin-bottom:28px;font-size:14px}
.op{background:var(--accent);color:#04101D;font-size:11px;font-weight:800;border-radius:5px;padding:1px 6px;margin-left:6px}
.toc{position:sticky;top:84px;align-self:start;font-size:14px}
.toc b{display:block;margin-bottom:8px;color:var(--text2)}
.toc a{display:block;color:var(--muted);padding:4px 0 4px 12px;border-left:2px solid var(--border)}
.toc a.on{color:var(--text);border-left-color:var(--accent);text-decoration:none}
.toc .l3{padding-left:24px}
.toc-m{display:none;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:10px 14px;margin-bottom:22px}
.prose{font-size:17px;line-height:1.75;overflow-wrap:anywhere}
.prose h2,.prose h3,.prose h4{letter-spacing:-.02em;line-height:1.25;margin:2em 0 .6em}
.prose h2{font-size:27px}.prose h3{font-size:21px}.prose h4{font-size:18px}
.prose img{max-width:100%;height:auto;border-radius:10px}
.prose blockquote{margin:1.2em 0;padding:2px 18px;border-left:3px solid var(--accent);color:var(--text2)}
.prose code{background:var(--elev);border-radius:5px;padding:1px 6px;font:14px ui-monospace,Menlo,Consolas,monospace}
.prose pre{position:relative;background:#050D18;border:1px solid var(--border);border-radius:10px;padding:16px;overflow-x:auto}
.prose pre code{background:none;padding:0}
.copy{position:absolute;top:8px;right:8px;background:var(--elev);color:var(--text2);border:1px solid var(--border);border-radius:6px;font:600 12px var(--font);padding:3px 9px;cursor:pointer}
.prose table{border-collapse:collapse;display:block;overflow-x:auto;max-width:100%}
.prose th,.prose td{border:1px solid var(--border);padding:8px 12px;text-align:left}
.prose th{background:var(--elev)}
.prose hr{border:0;border-top:1px solid var(--border);margin:2em 0}
.prose figcaption{color:var(--muted);font-size:14px;text-align:center}
.rel{max-width:1120px;margin:0 auto;padding:10px 20px 40px}
/* search palette */
.palette{position:fixed;inset:0;z-index:90;display:flex;justify-content:center;align-items:flex-start;padding:10vh 16px}
.palette[hidden]{display:none}
.palette-bg{position:absolute;inset:0;background:rgba(3,8,16,.72)}
.palette-box{position:relative;width:100%;max-width:640px;background:var(--card);border:1px solid var(--border);border-radius:16px;overflow:hidden}
.palette-box input{width:100%;background:none;border:0;border-bottom:1px solid var(--border);color:var(--text);font:500 17px var(--font);padding:18px 20px;outline:none}
.p-results{max-height:56vh;overflow:auto;padding:6px}
.p-item{display:block;padding:10px 14px;border-radius:10px;color:var(--text)}
.p-item:hover,.p-item.act{background:var(--elev);text-decoration:none}
.p-item small{display:block;color:var(--muted);font-size:13px}
.p-item mark{background:rgba(101,191,255,.25);color:var(--text);border-radius:3px}
.p-msg{padding:22px;color:var(--text2);text-align:center}
.foot{border-top:1px solid var(--border);color:var(--muted);font-size:14px;padding:22px 0;margin-top:40px}
/* motion */
.reveal{opacity:0;transform:translateY(10px);transition:opacity .5s ease,transform .5s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.reveal{opacity:1;transform:none;transition:none}.skel{animation:none}}
@media (max-width:900px){.art-wrap{display:block}.toc{display:none}.toc-m{display:block}}
@media (max-width:720px){
 .menu-btn{display:grid}
 .links{display:none;position:absolute;left:0;right:0;top:60px;background:var(--bg2);border-bottom:1px solid var(--border);flex-direction:column;padding:10px 20px}
 .links.open{display:flex}
 .links a{padding:12px}
 .hero{padding:48px 0 32px}
 .nav-in{gap:12px}.nav-r{margin-left:auto}
 .links{flex:none}
}
.center{text-align:center}.mt{margin-top:8px!important}.mid{align-self:center}.page-h.tall{padding-top:90px}