:root{
  --bg:#ffffff;
  --bg-soft:#f5f7fb;
  --ink:#0d1424;
  --ink-soft:#4a5567;
  --ink-faint:#78839a;
  --line:#e3e8f0;
  --brand:#1e63e9;
  --brand-soft:#eaf1ff;
  --accent:#00b9a3;
  --warn-bg:#fff6e8;
  --warn-line:#f0c98a;
  --radius:14px;
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#0b1020;
    --bg-soft:#111832;
    --ink:#eef2fb;
    --ink-soft:#aab6cd;
    --ink-faint:#8390ab;
    --line:#212a45;
    --brand:#6a9bff;
    --brand-soft:#16203c;
    --accent:#2fd4bd;
    --warn-bg:#2a2213;
    --warn-line:#6b552a;
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif;
  line-height:1.68;-webkit-font-smoothing:antialiased;
}
@media (prefers-reduced-motion: reduce){html{scroll-behavior:auto}}
a{color:var(--brand)}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}

header{
  position:sticky;top:0;z-index:50;
  background:color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;text-decoration:none;color:var(--ink);letter-spacing:-.02em}
.logo .mark{
  width:29px;height:29px;border-radius:9px;color:#fff;font-weight:800;font-size:15px;
  background:linear-gradient(135deg,var(--brand),var(--accent));display:grid;place-items:center;
}
.nav-links{display:flex;align-items:center;gap:22px}
.nav-links a{text-decoration:none;color:var(--ink-soft);font-size:15px;font-weight:500}
.nav-links a:hover,.nav-links a.active{color:var(--ink)}
@media(max-width:720px){.nav-links a:not(.btn){display:none}}
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 18px;border-radius:11px;text-decoration:none;font-weight:600;font-size:15px;border:1px solid transparent}
.btn-primary{background:var(--brand);color:#fff}
.btn-sm{padding:8px 15px;font-size:14px}

.shell{display:grid;grid-template-columns:250px minmax(0,1fr);gap:52px;max-width:1180px;margin:0 auto;padding:44px 24px 80px}
@media(max-width:940px){.shell{grid-template-columns:1fr;gap:0;padding-top:28px}}

.side{position:sticky;top:96px;align-self:start;max-height:calc(100vh - 120px);overflow-y:auto}
@media(max-width:940px){
  .side{position:static;max-height:none;margin-bottom:36px;padding-bottom:24px;border-bottom:1px solid var(--line)}
}
.side h5{margin:22px 0 8px;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-faint)}
.side h5:first-child{margin-top:0}
.side a{
  display:block;padding:6px 10px;margin-left:-10px;border-radius:8px;
  text-decoration:none;color:var(--ink-soft);font-size:14.5px;
}
.side a:hover{background:var(--bg-soft);color:var(--ink)}

.doc{min-width:0}
.crumb{font-size:13px;font-weight:700;letter-spacing:.09em;text-transform:uppercase;color:var(--brand);margin:0 0 10px}
.doc h1{font-size:clamp(32px,4.4vw,44px);line-height:1.12;letter-spacing:-.03em;margin:0 0 18px;font-weight:800}
.doc .lead{font-size:18px;color:var(--ink-soft);margin:0 0 40px}
.doc h2{
  font-size:26px;letter-spacing:-.02em;margin:52px 0 14px;font-weight:750;
  padding-top:14px;border-top:1px solid var(--line);scroll-margin-top:88px;
}
.doc h3{font-size:19px;margin:30px 0 10px;letter-spacing:-.01em;scroll-margin-top:88px}
.doc h4{font-size:16px;margin:24px 0 8px}
.doc p{margin:0 0 16px;color:var(--ink-soft)}
.doc strong{color:var(--ink)}
.doc em{font-style:normal;color:var(--ink);background:var(--bg-soft);padding:1px 6px;border-radius:6px;font-size:.95em}

ol.steps-list{counter-reset:s;list-style:none;padding:0;margin:0 0 22px}
ol.steps-list li{
  position:relative;padding:0 0 0 42px;margin-bottom:14px;color:var(--ink-soft);
}
ol.steps-list li::before{
  counter-increment:s;content:counter(s);
  position:absolute;left:0;top:2px;width:27px;height:27px;border-radius:9px;
  background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-size:14px;font-weight:800;
}
ul.check{list-style:none;padding:0;margin:0 0 22px}
ul.check li{position:relative;padding:0 0 0 30px;margin-bottom:10px;color:var(--ink-soft)}
ul.check li::before{
  content:"";position:absolute;left:0;top:8px;width:17px;height:17px;border-radius:50%;
  background:linear-gradient(135deg,var(--brand),var(--accent));
  -webkit-mask:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path d='M20 6L9 17l-5-5' fill='none' stroke='black' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'/></svg>") center/12px no-repeat;
  mask:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'><path d='M20 6L9 17l-5-5' fill='none' stroke='black' stroke-width='3.2' stroke-linecap='round' stroke-linejoin='round'/></svg>") center/12px no-repeat;
}
.doc ul:not(.check):not(.nav-links){padding-left:22px;margin:0 0 20px;color:var(--ink-soft)}
.doc ol:not(.steps-list){padding-left:22px;margin:0 0 20px;color:var(--ink-soft)}
.doc li{margin-bottom:8px}

.callout{
  border:1px solid var(--line);border-left:4px solid var(--brand);
  background:var(--bg-soft);border-radius:var(--radius);padding:18px 20px;margin:24px 0;color:var(--ink-soft);
}
.callout strong{color:var(--ink)}
.callout.warn{border-left-color:#e0a33c;background:var(--warn-bg);border-color:var(--warn-line)}

.example{
  border:1px dashed var(--line);border-radius:var(--radius);padding:18px 20px;margin:22px 0;background:var(--bg-soft);
}
.ex-label{display:block;font-size:12px;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-faint);margin-bottom:8px;font-weight:700}
code{
  font-family:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
  font-size:14.5px;background:var(--brand-soft);color:var(--brand);padding:3px 8px;border-radius:7px;
}
pre{
  background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;overflow-x:auto;margin:0 0 22px;
}
pre code{background:none;color:var(--ink);padding:0;font-size:13.6px;line-height:1.6}

.tbl{width:100%;border-collapse:collapse;margin:0 0 24px;font-size:15px;display:block;overflow-x:auto}
.tbl th,.tbl td{text-align:left;padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:top}
.tbl th{font-size:13px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-faint);font-weight:700}
.tbl td{color:var(--ink-soft)}

details{border:1px solid var(--line);border-radius:var(--radius);padding:14px 18px;margin-bottom:10px;background:var(--bg)}
details summary{cursor:pointer;font-weight:620;list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:center;color:var(--ink)}
details summary::-webkit-details-marker{display:none}
details summary::after{content:"+";font-size:20px;color:var(--ink-faint);font-weight:400}
details[open] summary::after{content:"–"}
details p{margin:12px 0 2px}

.sep{border:0;border-top:1px solid var(--line);margin:56px 0}
.updated{margin-top:48px;font-size:14px;color:var(--ink-faint)}

footer{border-top:1px solid var(--line);padding:28px 0;font-size:14px;color:var(--ink-faint)}
.foot-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
footer a{color:var(--ink-soft);text-decoration:none}
footer a:hover{color:var(--ink)}