:root{
  --bg:#08080c;
  --bg-2:#0b0b12;
  --panel:#101019;
  --panel-2:#14141f;
  --elevated:#1a1b29;
  --border:rgba(255,255,255,.07);
  --border-2:rgba(255,255,255,.12);
  --text:#eceefb;
  --muted:#9aa0c4;
  --faint:#646b97;
  --primary:#7aa2f7;
  --primary-hi:#a9c1ff;
  --accent:#bb9af7;
  --cyan:#7dcfff;
  --ok:#9ece6a;
  --warn:#e0af68;
  --danger:#f7768e;
  --radius:14px;
  --sidebar-w:266px;
  --toc-w:220px;
  --topbar-h:62px;
  --font:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --mono:"JetBrains Mono","SFMono-Regular",ui-monospace,"Cascadia Code",Menlo,Consolas,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--text);font-family:var(--font);
  line-height:1.7;-webkit-font-smoothing:antialiased;
}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-hi)}
::selection{background:rgba(122,162,247,.32);color:#fff}

/* faint background glow */
body::before{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(620px 420px at 12% -5%,rgba(59,91,219,.16),transparent 70%),
    radial-gradient(560px 420px at 100% 0%,rgba(139,92,246,.12),transparent 70%);}

/* ---------- Top bar ---------- */
.topbar{
  position:fixed;top:0;left:0;right:0;height:var(--topbar-h);z-index:50;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:0 22px;backdrop-filter:blur(18px);
  background:rgba(8,8,12,.78);border-bottom:1px solid var(--border);
}
.tb-left{display:flex;align-items:center;gap:14px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:-.02em;color:var(--text)}
.logo{width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,var(--primary),var(--accent));
  display:grid;place-items:center;color:#0a0a12;font-family:var(--mono);font-weight:800;font-size:17px;
  box-shadow:0 6px 18px rgba(122,162,247,.45)}
.docs-badge{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--primary-hi);
  border:1px solid rgba(122,162,247,.3);background:rgba(122,162,247,.08);padding:3px 9px;border-radius:7px}
.tb-right{display:flex;align-items:center;gap:22px}
.tb-right a{color:var(--muted);font-size:14.5px;font-weight:500}
.tb-right a:hover{color:var(--text)}
.tb-right .btn{color:#0a0a12;background:linear-gradient(180deg,var(--primary-hi),var(--primary));
  padding:8px 16px;border-radius:9px;font-weight:600;font-size:14px;box-shadow:0 6px 18px rgba(122,162,247,.35)}
.tb-right .btn:hover{color:#0a0a12}
.menu-btn{display:none;background:none;border:1px solid var(--border-2);color:var(--text);
  width:38px;height:34px;border-radius:9px;cursor:pointer;font-size:18px}

/* search box (static, decorative-functional filter) */
.search{display:flex;align-items:center;gap:8px;background:rgba(255,255,255,.04);
  border:1px solid var(--border-2);border-radius:9px;padding:7px 12px;width:230px}
.search input{background:none;border:none;outline:none;color:var(--text);font-family:var(--font);font-size:13.5px;width:100%}
.search input::placeholder{color:var(--faint)}
.search .k{font-family:var(--mono);font-size:11px;color:var(--faint);border:1px solid var(--border);border-radius:5px;padding:1px 5px}

/* ---------- Layout ---------- */
.layout{display:grid;grid-template-columns:var(--sidebar-w) minmax(0,1fr) var(--toc-w);
  max-width:1440px;margin:0 auto;padding-top:var(--topbar-h);position:relative;z-index:1}
@media(max-width:1100px){.layout{grid-template-columns:var(--sidebar-w) minmax(0,1fr)}.toc{display:none}}
@media(max-width:860px){.layout{grid-template-columns:1fr}}

/* ---------- Sidebar ---------- */
.sidebar{
  position:sticky;top:var(--topbar-h);align-self:start;height:calc(100vh - var(--topbar-h));
  overflow-y:auto;padding:26px 14px 60px 22px;border-right:1px solid var(--border);
}
.sidebar::-webkit-scrollbar{width:8px}
.sidebar::-webkit-scrollbar-thumb{background:var(--border-2);border-radius:8px}
.nav-group{margin-bottom:24px}
.nav-group > a.grp{display:block;font-size:12px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;
  color:var(--faint);margin-bottom:9px;padding:0 10px}
.nav-group > a.grp.active{color:var(--primary)}
.nav-group ul{list-style:none}
.nav-group li a{display:block;color:var(--muted);font-size:14px;padding:6px 10px;border-radius:8px;
  border-left:2px solid transparent;transition:color .15s,background .15s,border-color .15s}
.nav-group li a:hover{color:var(--text);background:rgba(255,255,255,.03)}
.nav-group li a.active{color:var(--primary-hi);background:rgba(122,162,247,.08);border-left-color:var(--primary)}
@media(max-width:860px){
  .sidebar{position:fixed;top:var(--topbar-h);left:0;width:var(--sidebar-w);max-width:84vw;z-index:45;
    background:var(--bg-2);transform:translateX(-104%);transition:transform .25s ease;box-shadow:0 0 40px rgba(0,0,0,.6)}
  .sidebar.open{transform:none}
  .menu-btn{display:block}
}
.scrim{display:none;position:fixed;inset:var(--topbar-h) 0 0 0;background:rgba(0,0,0,.5);z-index:44}
.scrim.show{display:block}

/* ---------- Content ---------- */
.content{padding:42px 56px 120px;min-width:0}
@media(max-width:1100px){.content{padding:42px 44px 120px}}
@media(max-width:600px){.content{padding:30px 22px 100px}}
.crumbs{font-size:13px;color:var(--faint);margin-bottom:14px;font-weight:500}
.crumbs span{color:var(--muted)}
.content h1{font-size:clamp(30px,4.4vw,42px);letter-spacing:-.035em;line-height:1.12;font-weight:800;margin-bottom:14px}
.lead{font-size:18.5px;color:var(--muted);margin-bottom:34px;max-width:760px}
.content h2{font-size:25px;letter-spacing:-.02em;font-weight:700;margin:54px 0 16px;padding-top:8px;scroll-margin-top:84px}
.content h2:first-of-type{margin-top:24px}
.content h3{font-size:18.5px;font-weight:700;margin:30px 0 12px;letter-spacing:-.01em;scroll-margin-top:84px}
.content h2 .anchor,.content h3 .anchor{opacity:0;color:var(--faint);margin-left:8px;font-weight:400;transition:opacity .15s}
.content h2:hover .anchor,.content h3:hover .anchor{opacity:1}
.content p{color:var(--muted);font-size:15.5px;margin-bottom:16px;max-width:760px}
.content ul,.content ol{color:var(--muted);font-size:15.5px;margin:0 0 18px;padding-left:22px;max-width:760px}
.content li{margin-bottom:9px}
.content li::marker{color:var(--primary)}
.content strong{color:var(--text);font-weight:650}
.content a{font-weight:500}
.content hr{border:none;border-top:1px solid var(--border);margin:44px 0}

/* inline code */
.content code{font-family:var(--mono);font-size:13px;color:var(--cyan);
  background:rgba(125,207,255,.08);border:1px solid rgba(125,207,255,.14);padding:1px 6px;border-radius:6px}

/* code blocks */
.codeblock{position:relative;margin:0 0 22px;border:1px solid var(--border-2);border-radius:12px;overflow:hidden;
  background:linear-gradient(180deg,rgba(20,20,31,.85),rgba(12,12,18,.92));max-width:820px}
.codeblock .cb-bar{display:flex;align-items:center;justify-content:space-between;padding:8px 14px;
  background:rgba(255,255,255,.02);border-bottom:1px solid var(--border)}
.codeblock .cb-lang{font-family:var(--mono);font-size:11.5px;color:var(--faint);text-transform:uppercase;letter-spacing:.08em}
.codeblock .cb-copy{background:none;border:1px solid var(--border-2);color:var(--muted);font-size:11.5px;
  padding:3px 9px;border-radius:6px;cursor:pointer;font-family:var(--font);transition:color .15s,border-color .15s}
.codeblock .cb-copy:hover{color:var(--text);border-color:var(--primary)}
.codeblock pre{margin:0;padding:16px 18px;overflow-x:auto}
.codeblock code{font-family:var(--mono);font-size:13px;color:#cdd3f5;background:none;border:none;padding:0;line-height:1.75;white-space:pre}
.tok-kw{color:var(--accent)}.tok-fn{color:var(--primary)}.tok-str{color:var(--ok)}
.tok-com{color:var(--faint)}.tok-num{color:var(--warn)}.tok-key{color:var(--cyan)}

/* callouts */
.note{display:flex;gap:13px;border-radius:12px;padding:15px 17px;margin:0 0 22px;max-width:820px;
  border:1px solid var(--border-2);background:rgba(255,255,255,.02);font-size:14.5px;color:var(--muted)}
.note .ic{flex-shrink:0;font-size:16px;line-height:1.5}
.note strong{display:block;color:var(--text);margin-bottom:2px;font-size:14px}
.note.info{border-color:rgba(122,162,247,.3);background:rgba(122,162,247,.06)}
.note.warn{border-color:rgba(224,175,104,.32);background:rgba(224,175,104,.06)}
.note.ok{border-color:rgba(158,206,106,.3);background:rgba(158,206,106,.06)}

/* tables */
.tbl-wrap{overflow-x:auto;margin:0 0 24px;max-width:820px}
table{border-collapse:collapse;width:100%;font-size:14px}
th,td{text-align:left;padding:11px 14px;border-bottom:1px solid var(--border);vertical-align:top}
th{color:var(--text);font-weight:650;font-size:12.5px;text-transform:uppercase;letter-spacing:.05em;background:rgba(255,255,255,.02)}
td{color:var(--muted)}
td code{white-space:nowrap}
tr:hover td{background:rgba(255,255,255,.015)}

/* feature/key-value cards */
.kv{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;margin:0 0 24px;max-width:820px}
.kv .item{border:1px solid var(--border);border-radius:11px;padding:15px 16px;background:rgba(255,255,255,.02)}
.kv .item h4{font-size:14.5px;margin-bottom:5px;color:var(--text);font-weight:650}
.kv .item p{font-size:13px;margin:0}

/* tool reference block */
.tool{border:1px solid var(--border);border-radius:12px;margin:0 0 16px;overflow:hidden;max-width:820px;
  background:rgba(255,255,255,.02)}
.tool .t-head{display:flex;align-items:center;gap:10px;padding:12px 16px;background:rgba(122,162,247,.05);border-bottom:1px solid var(--border)}
.tool .t-name{font-family:var(--mono);font-size:14.5px;color:var(--primary-hi);font-weight:600}
.tool .t-body{padding:13px 16px}
.tool .t-body p{margin:0 0 8px;font-size:14px}
.tool .t-row{font-size:13.5px;color:var(--muted);margin-top:6px}
.tool .t-row b{color:var(--text);font-family:var(--mono);font-size:12.5px;font-weight:600}
.tag{display:inline-block;font-family:var(--mono);font-size:11px;font-weight:700;padding:2px 8px;border-radius:6px}
.tag.read{background:rgba(125,207,255,.13);color:var(--cyan)}
.tag.write{background:rgba(187,154,247,.14);color:var(--accent)}

/* pager */
.pager{display:flex;justify-content:space-between;gap:16px;margin-top:60px;border-top:1px solid var(--border);padding-top:26px;flex-wrap:wrap}
.pager a{flex:1;min-width:200px;border:1px solid var(--border);border-radius:12px;padding:15px 18px;transition:border-color .2s,transform .2s}
.pager a:hover{border-color:var(--border-2);transform:translateY(-2px)}
.pager .dir{font-size:12px;color:var(--faint);font-weight:600}
.pager .ti{color:var(--text);font-weight:650;font-size:15.5px;margin-top:3px}
.pager .next{text-align:right}

/* ---------- TOC ---------- */
.toc{position:sticky;top:var(--topbar-h);align-self:start;height:calc(100vh - var(--topbar-h));
  overflow-y:auto;padding:42px 22px 60px 10px}
.toc h5{font-size:11.5px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--faint);margin-bottom:12px}
.toc ul{list-style:none}
.toc li a{display:block;color:var(--muted);font-size:13px;padding:4px 0 4px 12px;border-left:2px solid var(--border);transition:color .15s,border-color .15s}
.toc li a.sub{padding-left:24px;font-size:12.5px}
.toc li a:hover{color:var(--text)}
.toc li a.active{color:var(--primary-hi);border-left-color:var(--primary)}

/* hero on index */
.doc-hero{border:1px solid var(--border-2);border-radius:18px;padding:30px 32px;margin:0 0 36px;max-width:820px;
  background:radial-gradient(600px 240px at 90% -20%,rgba(122,162,247,.14),transparent 70%),linear-gradient(180deg,rgba(20,20,31,.7),rgba(12,12,18,.8))}
.doc-hero h1{margin-bottom:10px}
.doc-hero p{font-size:16.5px;margin-bottom:0}

/* quick cards grid on index */
.cards3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:8px 0 24px;max-width:820px}
@media(max-width:680px){.cards3{grid-template-columns:1fr}}
.qcard{border:1px solid var(--border);border-radius:13px;padding:20px;background:rgba(255,255,255,.02);transition:transform .2s,border-color .2s;display:block}
.qcard:hover{transform:translateY(-3px);border-color:var(--border-2)}
.qcard h3{font-size:16px;color:var(--text);margin:0 0 6px;font-weight:700}
.qcard p{font-size:13.5px;color:var(--muted);margin:0}
.qcard .ar{color:var(--primary);font-weight:700;margin-top:10px;display:inline-block;font-size:13.5px}