:root{
  --bg:#ffffff; --bg-soft:#f3f4f8; --card:#fafafc; --elev:#ffffff;
  --ink:#0b0b14; --ink-2:#1c202c; --muted:#4a5166; --faint:#6b7287;
  --line:#ebedf2; --line-2:#dadee8; --line-3:#afb5c7;
  --brand:#1a1aff; --brand-hover:#1111e6; --brand-ink:#ffffff; --link:#1a1aff;
  --brand-soft:rgba(26,26,255,.07); --brand-soft-2:rgba(26,26,255,.14);
  --accent:#00b8d4;
  --ok:#0e8f52; --ok-soft:rgba(16,167,96,.09);
  --warn:#9a6200; --warn-line:#d98a00; --warn-soft:rgba(217,138,0,.10);
  --err:#c0283a; --err-soft:rgba(220,53,69,.08);
  --code-bg:#0f101c; --code-ink:#e6e8f2; --inline-code:#eef0f6;
  --shadow:0 8px 32px rgba(11,11,20,.12),0 2px 8px rgba(11,11,20,.06);
  --mark:rgba(0,224,255,.28);
  --f-display:"Archivo Black","Arial Black",system-ui,sans-serif;
  --f-head:"Archivo",system-ui,-apple-system,"Segoe UI",sans-serif;
  --f-body:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --f-mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Consolas,monospace;
  --top:60px;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  color-scheme:dark;
  --bg:#07070e; --bg-soft:#11121e; --card:#0f101c; --elev:#161826;
  --ink:#f8f9fc; --ink-2:#e0e4f0; --muted:#b0b6ca; --faint:#8a91a8;
  --line:#1e202e; --line-2:#2e3244; --line-3:#585f78;
  --brand:#4d4dff; --brand-hover:#6666ff; --brand-ink:#ffffff; --link:#9494ff;
  --brand-soft:rgba(77,77,255,.12); --brand-soft-2:rgba(77,77,255,.22);
  --accent:#00e0ff;
  --ok:#3fd18e; --ok-soft:rgba(38,200,124,.10);
  --warn:#f5b142; --warn-line:#f5a820; --warn-soft:rgba(245,168,32,.10);
  --err:#ff7a88; --err-soft:rgba(255,92,108,.10);
  --code-bg:#0b0c16; --code-ink:#e6e8f2; --inline-code:#1c1e2e;
  --shadow:0 12px 40px rgba(0,0,0,.55),0 2px 8px rgba(0,0,0,.4);
  --mark:rgba(0,224,255,.25);
}}
:root[data-theme="dark"]{
  color-scheme:dark;
  --bg:#07070e; --bg-soft:#11121e; --card:#0f101c; --elev:#161826;
  --ink:#f8f9fc; --ink-2:#e0e4f0; --muted:#b0b6ca; --faint:#8a91a8;
  --line:#1e202e; --line-2:#2e3244; --line-3:#585f78;
  --brand:#4d4dff; --brand-hover:#6666ff; --brand-ink:#ffffff; --link:#9494ff;
  --brand-soft:rgba(77,77,255,.12); --brand-soft-2:rgba(77,77,255,.22);
  --accent:#00e0ff;
  --ok:#3fd18e; --ok-soft:rgba(38,200,124,.10);
  --warn:#f5b142; --warn-line:#f5a820; --warn-soft:rgba(245,168,32,.10);
  --err:#ff7a88; --err-soft:rgba(255,92,108,.10);
  --code-bg:#0b0c16; --code-ink:#e6e8f2; --inline-code:#1c1e2e;
  --shadow:0 12px 40px rgba(0,0,0,.55),0 2px 8px rgba(0,0,0,.4);
  --mark:rgba(0,224,255,.25);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-padding-top:calc(var(--top) + 24px)}
body{background:var(--bg);color:var(--ink);font:400 15.5px/1.62 var(--f-body);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
button{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.wrap{max-width:1280px;margin:0 auto;padding-inline:16px}
@media (min-width:720px){.wrap{padding-inline:28px}}

/* ---------- top bar ---------- */
.top{position:sticky;top:env(safe-area-inset-top,0px);z-index:40;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:14px;height:var(--top)}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none!important;flex-shrink:0}
.brand svg{width:26px;height:26px;color:var(--brand);flex-shrink:0}
.brand-word{font:400 17px/1 var(--f-display);letter-spacing:.01em}
.brand-tag{font:600 12px/1 var(--f-head);color:var(--muted);padding:5px 8px;border:1px solid var(--line-2);border-radius:999px;letter-spacing:.02em}
.top-search{flex:1;max-width:440px;margin-left:auto;display:flex;align-items:center;gap:10px;height:38px;padding:0 10px 0 12px;border:1px solid var(--line-2);border-radius:10px;background:var(--bg-soft);color:var(--faint);cursor:pointer;text-align:left;min-width:0}
.top-search:hover{border-color:var(--line-3)}
.top-search span{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:14px}
kbd{font:500 11px/1 var(--f-mono);padding:4px 6px;border:1px solid var(--line-2);border-bottom-width:2px;border-radius:6px;background:var(--elev);color:var(--muted)}
.top-links{display:flex;align-items:center;gap:4px}
.top-links a{font:600 13.5px/1 var(--f-head);color:var(--ink-2);padding:9px 10px;border-radius:8px}
.top-links a:hover{background:var(--bg-soft);text-decoration:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:600 13.5px/1 var(--f-head);padding:10px 14px;border-radius:9px;border:1px solid transparent;cursor:pointer;text-decoration:none!important;white-space:nowrap}
.btn-primary{background:var(--brand);color:var(--brand-ink)}
.btn-primary:hover{background:var(--brand-hover)}
.btn-ghost{border-color:var(--line-2);background:var(--elev);color:var(--ink-2)}
.btn-ghost:hover{border-color:var(--line-3)}
.lang{display:inline-flex;border:1px solid var(--line-2);border-radius:9px;overflow:hidden;flex-shrink:0}
.lang button{border:0;background:transparent;font:600 12px/1 var(--f-head);letter-spacing:.06em;padding:9px 9px;cursor:pointer;color:var(--muted)}
@media (max-width:420px){.lang button{padding:9px 7px}.brand-word{font-size:15px}}
.lang button[aria-pressed="true"]{background:var(--ink);color:var(--bg)}
.icon-btn{display:none;width:38px;height:38px;border:1px solid var(--line-2);border-radius:10px;background:var(--elev);cursor:pointer;align-items:center;justify-content:center;color:var(--ink-2);flex-shrink:0}
.icon-btn svg{width:18px;height:18px}
@media (max-width:1060px){.top-links .hide-md{display:none}}
@media (max-width:520px){.top-login{display:none}}
@media (max-width:820px){
  .top-links{display:none}
  .top-search{display:none}
  .icon-btn{display:inline-flex}
  .brand-tag{display:none}
  .top .wrap{gap:8px}
  .top .spacer{flex:1}
}

/* ---------- home ---------- */
.hero{border-bottom:1px solid var(--line);background:
  radial-gradient(1200px 380px at 85% -10%,var(--brand-soft),transparent 70%),var(--bg)}
.hero .wrap{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:48px;align-items:center;padding-block:56px 48px}
.eyebrow{font:600 12px/1.2 var(--f-head);letter-spacing:.14em;text-transform:uppercase;color:var(--brand)}
:root[data-theme="dark"] .eyebrow{color:var(--link)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .eyebrow{color:var(--link)}}
.hero h1{font:400 clamp(34px,5.2vw,58px)/1.02 var(--f-display);letter-spacing:-.01em;margin:14px 0 14px;text-wrap:balance}
.hero p.lead{font-size:17px;color:var(--muted);max-width:56ch;margin:0 0 26px}
.hero-search{display:flex;align-items:center;gap:12px;height:56px;padding:0 10px 0 18px;border:1.5px solid var(--line-2);border-radius:14px;background:var(--elev);box-shadow:0 1px 2px rgba(11,11,20,.04);cursor:text;max-width:620px;width:100%;text-align:left}
.hero-search:hover{border-color:var(--brand)}
.hero-search svg{width:20px;height:20px;color:var(--faint);flex-shrink:0}
.hero-search span{flex:1;color:var(--faint);font-size:16px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.popular{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-top:18px;max-width:640px}
.popular .lbl{font:600 12px/1 var(--f-head);color:var(--faint);letter-spacing:.06em;text-transform:uppercase;margin-right:4px}
.chip{display:inline-flex;align-items:center;font:500 13.5px/1.2 var(--f-body);padding:7px 12px;border-radius:999px;background:var(--bg-soft);color:var(--ink-2);border:1px solid var(--line);text-decoration:none!important}
.chip:hover{border-color:var(--brand);color:var(--link)}
.pixel{display:grid;grid-template-columns:repeat(12,1fr);gap:4%;padding:4%;aspect-ratio:1;width:100%;max-width:330px;justify-self:end;background:var(--brand);border-radius:2px}
.pixel i{display:block;aspect-ratio:1;border-radius:1px}
.pixel i.h{background:var(--bg)}
.pixel i.t{animation:tw 5.5s ease-in-out infinite}
@keyframes tw{0%,100%{background:var(--brand)}45%,60%{background:var(--bg)}}
@media (prefers-reduced-motion:reduce){.pixel i.t{animation:none}}
@media (max-width:820px){.hero .wrap{grid-template-columns:minmax(0,1fr);padding-block:36px 32px;gap:0}.pixel{display:none}.hero-search kbd{display:none}}

.home-body{padding-block:40px 24px}
.home-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:18px;flex-wrap:wrap}
.home-head h2{font:700 22px/1.2 var(--f-head);margin:0}
.home-head .note{color:var(--faint);font-size:14px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:16px}
.card{min-width:0;display:flex;flex-direction:column;gap:10px;padding:20px 20px 16px;border:1px solid var(--line);border-radius:14px;background:var(--card);transition:border-color .12s,box-shadow .12s}
.card:hover{border-color:var(--line-3);box-shadow:var(--shadow)}
.card-top{display:flex;align-items:center;gap:12px}.card-top>div{min-width:0;flex:1}.card-foot{display:flex;align-items:center;gap:12px;margin-top:auto;padding-top:6px}
.glyph{width:30px;height:30px;flex-shrink:0;color:var(--brand)}
.card h3{font:700 17px/1.25 var(--f-head);margin:0}
.card h3 a{color:var(--ink)}
.dom{font:500 11.5px/1.3 var(--f-mono);color:var(--faint);overflow-wrap:anywhere}
.card p{margin:0;color:var(--muted);font-size:14px;line-height:1.5}
.card ul{list-style:none;margin:4px 0 0;padding:0;display:grid;gap:2px;border-top:1px solid var(--line);padding-top:10px}
.card li{min-width:0}.card li a{display:block;font-size:14px;color:var(--ink-2);padding:3px 0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.card li a:hover{color:var(--link)}
.card .more{font:600 13px/1 var(--f-head);color:var(--link);margin-left:auto}
.count{font:500 12px/1 var(--f-mono);color:var(--faint);white-space:nowrap}

.start{margin-top:40px;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:0;border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--card)}
.start a{display:flex;flex-direction:column;gap:6px;padding:18px 20px;color:var(--ink);text-decoration:none!important;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.start a:hover{background:var(--brand-soft)}
.start .n{font:500 12px/1 var(--f-mono);color:var(--brand)}
:root[data-theme="dark"] .start .n{color:var(--link)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .start .n{color:var(--link)}}
.start b{font:700 15px/1.3 var(--f-head)}
.start span{font-size:13.5px;color:var(--muted);line-height:1.45}

/* ---------- docs layout ---------- */
.docs{display:grid;grid-template-columns:270px minmax(0,1fr) 220px;gap:40px;padding-block:28px 64px}
@media (max-width:1200px){.docs{grid-template-columns:250px minmax(0,1fr)}.toc{display:none}}
@media (max-width:900px){.docs{grid-template-columns:minmax(0,1fr);gap:0;padding-block:16px 48px}}
.side{position:sticky;top:calc(var(--top) + env(safe-area-inset-top,0px) + 20px);align-self:start;max-height:calc(100vh - var(--top) - 40px);overflow:auto;padding-right:6px;scrollbar-width:thin}
.side-sec{border-bottom:1px solid var(--line)}
.side-sec>button{display:flex;align-items:center;gap:8px;width:100%;border:0;background:none;cursor:pointer;padding:10px 4px;text-align:left;font:600 14px/1.3 var(--f-head);color:var(--ink-2)}
.side-sec>button .c{margin-left:auto;font:500 11px/1 var(--f-mono);color:var(--faint)}
.side-sec>button svg{width:12px;height:12px;flex-shrink:0;color:var(--faint);transition:transform .15s}
.side-sec.open>button svg{transform:rotate(90deg)}
.side-sec.cur>button{color:var(--ink)}
.side-list{display:none;padding:0 0 10px 4px}
.side-sec.open .side-list{display:block}
.side-grp{font:600 11px/1.2 var(--f-head);text-transform:uppercase;letter-spacing:.09em;color:var(--faint);padding:10px 8px 4px}
.side-list a{display:block;font-size:13.8px;line-height:1.35;color:var(--muted);padding:6px 8px;border-radius:7px;border-left:2px solid transparent}
.side-list a:hover{color:var(--ink);background:var(--bg-soft);text-decoration:none}
.side-list a[aria-current="page"]{color:var(--ink);background:var(--brand-soft);border-left-color:var(--brand);font-weight:500}
.side-open{display:none}
@media (max-width:900px){
  .side{position:fixed;inset:0 auto 0 0;top:0;width:min(86vw,340px);max-height:none;height:100%;z-index:60;background:var(--bg);padding:calc(env(safe-area-inset-top,0px) + 16px) 16px 24px;transform:translateX(-102%);transition:transform .2s ease;box-shadow:var(--shadow)}
  .side.show{transform:none}
  .side-open{display:flex;align-items:center;gap:8px;margin-bottom:16px;border:1px solid var(--line-2);background:var(--elev);border-radius:9px;padding:9px 12px;font:600 13.5px/1 var(--f-head);cursor:pointer;color:var(--ink-2)}
  .side-open svg{width:16px;height:16px}
}
.scrim{position:fixed;inset:0;background:rgba(7,7,14,.45);z-index:55}
@media (prefers-reduced-motion:reduce){.side{transition:none}}

.crumbs{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:13px;color:var(--faint);margin-bottom:14px}
.crumbs a{color:var(--muted)}
.crumbs .sep{color:var(--line-3)}
.art{max-width:760px;min-width:0}
.art h1{font:700 clamp(27px,3.4vw,36px)/1.15 var(--f-head);letter-spacing:-.01em;margin:0 0 12px;text-wrap:balance}
.art .lead{font-size:17px;line-height:1.55;color:var(--muted);margin:0 0 16px;max-width:66ch}
.meta{display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center;font-size:12.5px;color:var(--faint);padding-bottom:20px;border-bottom:1px solid var(--line);margin-bottom:8px}
.pill{display:inline-flex;align-items:center;gap:6px;font:500 11.5px/1 var(--f-mono);padding:5px 8px;border-radius:6px;background:var(--bg-soft);color:var(--ink-2);border:1px solid var(--line)}
.pill i{width:6px;height:6px;border-radius:1px;background:var(--brand);display:inline-block}

/* prose */
.prose{font-size:15.5px;line-height:1.68;color:var(--ink-2)}
.prose>*{max-width:68ch}
.prose h2{font:700 22px/1.25 var(--f-head);color:var(--ink);margin:38px 0 12px;padding-top:4px;text-wrap:balance;max-width:none}
.prose h3{font:700 17px/1.3 var(--f-head);color:var(--ink);margin:28px 0 8px}
.prose h4{font:600 15px/1.3 var(--f-head);color:var(--ink);margin:22px 0 6px}
.prose p{margin:0 0 14px}
.prose ul,.prose ol{margin:0 0 16px;padding-left:24px}
.prose li{margin:5px 0}
.prose li>ul,.prose li>ol{margin:6px 0 4px}
.prose ol>li::marker{font:600 14px var(--f-head);color:var(--brand)}
:root[data-theme="dark"] .prose ol>li::marker{color:var(--link)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .prose ol>li::marker{color:var(--link)}}
.prose strong{color:var(--ink);font-weight:600}
.prose code{font:500 .86em/1.4 var(--f-mono);background:var(--inline-code);padding:2px 5px;border-radius:5px;color:var(--ink);word-break:break-word}
.prose hr{border:0;border-top:1px solid var(--line);margin:28px 0}
.prose img{max-width:100%;border-radius:8px;border:1px solid var(--line)}
.codeblock{position:relative;margin:0 0 18px;max-width:none}
.prose pre{margin:0;background:var(--code-bg);color:var(--code-ink);border-radius:10px;padding:16px 18px;overflow-x:auto;font:400 13.2px/1.6 var(--f-mono);border:1px solid var(--line)}
.prose pre code{background:none;padding:0;color:inherit;font:inherit;word-break:normal}
.copy{position:absolute;top:8px;right:8px;font:600 11.5px/1 var(--f-head);padding:6px 9px;border-radius:7px;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.06);color:#c9cde0;cursor:pointer}
.copy:hover{background:rgba(255,255,255,.14)}
.table-wrap{overflow-x:auto;margin:0 0 18px;border:1px solid var(--line);border-radius:10px;max-width:none}
.prose table{border-collapse:collapse;width:100%;font-size:14px;line-height:1.45}
.prose th{font:600 12.5px/1.3 var(--f-head);text-transform:none;text-align:left;color:var(--ink);background:var(--bg-soft);padding:10px 12px;border-bottom:1px solid var(--line-2);white-space:nowrap}
.prose td{padding:9px 12px;border-bottom:1px solid var(--line);vertical-align:top;font-variant-numeric:tabular-nums}
.prose tr:last-child td{border-bottom:0}
.prose blockquote{margin:0 0 18px;padding:14px 16px 2px 16px;border:1px solid var(--line-2);border-left:3px solid var(--brand);border-radius:0 10px 10px 0;background:var(--brand-soft);max-width:68ch}
.prose blockquote p{margin:0 0 12px}
.prose blockquote>p:first-child>strong:first-child{display:block;font:700 14px/1.3 var(--f-head);color:var(--ink);margin-bottom:4px}
.prose blockquote.warn{border-left-color:var(--warn-line);background:var(--warn-soft)}
.prose blockquote.danger{border-left-color:var(--err);background:var(--err-soft)}
.prose blockquote.tip{border-left-color:var(--ok);background:var(--ok-soft)}

.related{margin-top:44px;padding-top:22px;border-top:1px solid var(--line)}
.related h2{font:700 13px/1 var(--f-head);text-transform:uppercase;letter-spacing:.1em;color:var(--faint);margin:0 0 12px}
.rel-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:10px}
.rel-list a{display:block;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:var(--card);color:var(--ink-2);text-decoration:none!important}
.rel-list a:hover{border-color:var(--brand)}
.rel-list b{display:block;font:600 14px/1.35 var(--f-head);color:var(--ink)}
.rel-list span{display:block;font-size:12.5px;color:var(--faint);margin-top:3px}
.pager{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:28px}
.pager a{display:block;padding:14px 16px;border:1px solid var(--line);border-radius:10px;text-decoration:none!important;color:var(--ink)}
.pager a:hover{border-color:var(--brand)}
.pager small{display:block;font:600 11.5px/1 var(--f-head);color:var(--faint);text-transform:uppercase;letter-spacing:.08em;margin-bottom:6px}
.pager b{font:600 14.5px/1.3 var(--f-head)}
.pager .next{text-align:right;grid-column:2}
@media (max-width:560px){.pager{grid-template-columns:1fr}.pager .next{grid-column:1}}
.help-cta{margin-top:28px;display:flex;flex-wrap:wrap;gap:12px 18px;align-items:center;justify-content:space-between;padding:18px 20px;border-radius:12px;background:var(--bg-soft);border:1px solid var(--line)}
.help-cta b{font:700 15px/1.3 var(--f-head);display:block}
.help-cta span{font-size:13.5px;color:var(--muted)}
.help-cta .acts{display:flex;gap:8px;flex-wrap:wrap}

.toc{position:sticky;top:calc(var(--top) + env(safe-area-inset-top,0px) + 28px);align-self:start;max-height:calc(100vh - var(--top) - 56px);overflow:auto;font-size:13px}
.toc h4{font:600 11px/1 var(--f-head);text-transform:uppercase;letter-spacing:.1em;color:var(--faint);margin:6px 0 10px}
.toc a{display:block;color:var(--muted);padding:5px 0 5px 12px;border-left:1px solid var(--line-2);line-height:1.35;cursor:pointer}
.toc a.l3{padding-left:24px;font-size:12.5px}
.toc a:hover{color:var(--ink);text-decoration:none}
.toc a.on{color:var(--link);border-left-color:var(--brand)}

/* section index */
.sec-head{padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:10px}
.sec-head h1{font:700 clamp(27px,3.4vw,36px)/1.15 var(--f-head);margin:6px 0 10px}
.sec-head p{color:var(--muted);margin:0;max-width:66ch;font-size:16px}
.sec-grp{font:600 12px/1.2 var(--f-head);text-transform:uppercase;letter-spacing:.1em;color:var(--faint);margin:28px 0 6px}
.sec-list{list-style:none;margin:0;padding:0}
.sec-list li{border-bottom:1px solid var(--line)}
.sec-list a{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:4px 16px;padding:14px 4px;text-decoration:none!important}
.sec-list a:hover b{color:var(--link)}
.sec-list b{font:600 16px/1.35 var(--f-head);color:var(--ink)}
.sec-list span{grid-column:1;font-size:14px;color:var(--muted);line-height:1.5}
.sec-list .dom{grid-column:2;grid-row:1;align-self:center}
@media (max-width:560px){.sec-list a{grid-template-columns:1fr}.sec-list .dom{grid-column:1;grid-row:auto}}

/* ---------- search ---------- */
.modal{position:fixed;inset:0;z-index:80;display:flex;justify-content:center;align-items:flex-start;padding:calc(env(safe-area-inset-top,0px) + 8vh) 16px 16px;background:rgba(7,7,14,.5)}
.dialog{width:100%;max-width:700px;max-height:min(78vh,720px);display:flex;flex-direction:column;background:var(--elev);border:1px solid var(--line-2);border-radius:16px;box-shadow:var(--shadow);overflow:hidden}
.q-row{display:flex;align-items:center;gap:12px;padding:0 14px 0 18px;border-bottom:1px solid var(--line)}
.q-row svg{width:19px;height:19px;color:var(--faint);flex-shrink:0}
.q-row input{flex:1;min-width:0;height:58px;border:0;outline:0;background:transparent;font:400 17px/1 var(--f-body);color:var(--ink)}
.q-row input::placeholder{color:var(--faint)}
.results{overflow:auto;padding:8px}
.res{display:block;padding:11px 12px;border-radius:10px;color:var(--ink);text-decoration:none!important;cursor:pointer}
.res.on,.res:hover{background:var(--brand-soft)}
.res .rt{display:flex;gap:10px;align-items:baseline}
.res b{font:600 15px/1.35 var(--f-head)}
.res .rs{font:500 11px/1 var(--f-mono);color:var(--faint);margin-left:auto;white-space:nowrap}
.res p{margin:4px 0 0;font-size:13.5px;color:var(--muted);line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
mark{background:var(--mark);color:inherit;border-radius:3px;padding:0 1px}
.empty{padding:26px 16px;color:var(--muted);font-size:14.5px;text-align:center}
.q-foot{display:flex;flex-wrap:wrap;gap:6px 16px;align-items:center;padding:10px 16px;border-top:1px solid var(--line);font-size:12px;color:var(--faint)}
.q-foot span{display:inline-flex;gap:6px;align-items:center}

/* ---------- footer ---------- */
.foot{border-top:1px solid var(--line);background:var(--bg-soft);margin-top:24px}
.foot .wrap{display:flex;flex-wrap:wrap;gap:16px 28px;align-items:center;padding-block:26px;font-size:13.5px;color:var(--muted)}
.foot nav{display:flex;flex-wrap:wrap;gap:6px 18px;margin-left:auto}
.foot a{color:var(--muted)}
.foot a:hover{color:var(--ink)}
.foot .mono{font-family:var(--f-mono);font-size:12.5px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.toast{position:fixed;left:50%;bottom:calc(env(safe-area-inset-bottom,0px) + 22px);transform:translateX(-50%);background:var(--ink);color:var(--bg);font:600 13px/1 var(--f-head);padding:11px 16px;border-radius:10px;z-index:90;box-shadow:var(--shadow)}

html,body{margin:0}
img{max-width:100%}
[hidden]{display:none!important}
.skip{position:absolute;left:-9999px;top:8px;z-index:100;background:var(--ink);color:var(--bg);padding:8px 12px;border-radius:8px}
.skip:focus{left:12px}
.glyph .h{fill:var(--card)}
.top-search svg{width:16px;height:16px;flex-shrink:0}
.top-search kbd{flex-shrink:0;white-space:nowrap}
.lang a{display:inline-block;font:600 12px/1 var(--f-head);letter-spacing:.06em;padding:9px 9px;color:var(--muted);text-decoration:none!important}
.lang a[aria-current="true"]{background:var(--ink);color:var(--bg)}
@media (max-width:420px){.lang a{padding:9px 7px}}
.mt-lg{margin-top:44px}
.art.wide{max-width:860px}
.mono-mail{font-family:var(--f-mono);font-size:13px}
.toc a{cursor:pointer}
.nf{padding-block:72px;text-align:center}
.nf h1{font:400 clamp(30px,5vw,48px)/1.1 var(--f-display);margin:0 0 12px}
.nf p{color:var(--muted);max-width:56ch;margin:0 auto 22px}
.nf .acts{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
/* identifiers in tables stay whole; the table scrolls sideways instead */
.prose td code,.prose th code{white-space:nowrap;word-break:normal;overflow-wrap:normal}
/* scroll shadows: a wide table shows a soft edge where more columns are hidden */
.table-wrap{background:linear-gradient(to right,var(--bg) 30%,transparent) left/40px 100% no-repeat local,linear-gradient(to left,var(--bg) 30%,transparent) right/40px 100% no-repeat local,radial-gradient(farthest-side at 0 50%,rgba(11,11,20,.16),transparent) left/14px 100% no-repeat scroll,radial-gradient(farthest-side at 100% 50%,rgba(11,11,20,.16),transparent) right/14px 100% no-repeat scroll}
.table-wrap:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
/* "On this page": title is not a heading; inline collapsible copy below 1200px */
.toc .toc-title{font:600 11px/1 var(--f-head);text-transform:uppercase;letter-spacing:.1em;color:var(--faint);margin:6px 0 10px}
.toc-inline{display:none;margin:4px 0 18px;border:1px solid var(--line);border-radius:10px;background:var(--card)}
.toc-inline summary{cursor:pointer;padding:11px 14px;font:600 13.5px/1.2 var(--f-head);color:var(--ink-2)}
.toc-inline nav{padding:0 14px 12px}
.toc-inline a{display:block;padding:5px 0;color:var(--muted);font-size:14px;line-height:1.35}
.toc-inline a.l3{padding-left:14px;font-size:13.5px}
@media (max-width:1200px){.toc-inline{display:block}}
/* section list chip keeps its own width on phones */
@media (max-width:560px){.sec-list .dom{justify-self:start}}
/* search rows on phones: section label under the title */
@media (max-width:560px){.res .rt{flex-direction:column;align-items:flex-start;gap:2px}.res .rs{margin-left:0;white-space:normal}}
.q-close{border:1px solid var(--line-2);border-bottom-width:2px;background:var(--elev);color:var(--muted);border-radius:6px;font:500 11px/1 var(--f-mono);padding:4px 7px;cursor:pointer}
@media (pointer:coarse){.q-foot{display:none}.q-close{font-size:13px;padding:7px 10px}}
/* closed drawer is out of the tab order */
@media (max-width:900px){.side{visibility:hidden;transition:transform .2s ease,visibility 0s linear .2s}.side.show{visibility:visible;transition:transform .2s ease}}
@media (prefers-reduced-motion:reduce){.side,.side.show{transition:none}}
/* Archivo has no Cyrillic: Russian pages use Inter for headings and display text */
:root:lang(ru){--f-display:"Inter",system-ui,sans-serif;--f-head:"Inter",system-ui,-apple-system,"Segoe UI",sans-serif}
:lang(ru) .hero h1,:lang(ru) .nf h1{font-weight:800;letter-spacing:-.02em}
.brand-word{font-family:"Archivo Black","Arial Black",system-ui,sans-serif}