:root{
  color-scheme:dark;--bg:#070b0f;--bg2:#0b1116;--panel:#101820;--panel2:#141f28;--panel3:#192630;
  --ink:#edf5f7;--muted:#90a1aa;--line:#24333d;--line2:#30434f;--accent:#2bd1e7;--accent2:#89f2ff;
  --accent-deep:#0b8195;--green:#53e39a;--yellow:#f1ca63;--red:#ff7d7d;--code:#05080b;--top:rgba(8,13,17,.9);
  --shadow:0 22px 70px rgba(0,0,0,.38);--focus:0 0 0 3px rgba(43,209,231,.2);--radius:14px;--top-h:70px
}
html[data-theme="light"]{
  color-scheme:light;--bg:#f4f7f8;--bg2:#edf2f4;--panel:#fff;--panel2:#f7fafb;--panel3:#eef5f7;
  --ink:#142027;--muted:#64737c;--line:#dce5e9;--line2:#cad8de;--accent:#08a9c3;--accent2:#087d93;
  --accent-deep:#087d93;--green:#168a52;--yellow:#996d00;--red:#c54141;--code:#111a20;--top:rgba(255,255,255,.92);
  --shadow:0 18px 55px rgba(31,65,77,.11);--focus:0 0 0 3px rgba(8,169,195,.18)
}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:radial-gradient(circle at 75% -20%,rgba(43,209,231,.08),transparent 35%),var(--bg);color:var(--ink);font:15.5px/1.7 Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Arial,sans-serif;-webkit-font-smoothing:antialiased}a{color:var(--accent2)}button,input{font:inherit}.reading-progress{position:fixed;top:0;left:0;height:2px;width:0;background:linear-gradient(90deg,var(--accent),var(--accent2));z-index:100}.top{height:var(--top-h);position:sticky;top:0;z-index:60;display:flex;align-items:center;gap:14px;padding:0 22px;background:var(--top);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.logo{font-weight:950;font-size:21px;letter-spacing:2.5px;color:var(--ink);text-decoration:none;white-space:nowrap}.logo i{font-style:normal;color:var(--accent)}.logo.big{font-size:34px}.product{font-weight:750;color:var(--muted);white-space:nowrap}.version-badge{display:inline-flex;align-items:center;padding:4px 8px;border:1px solid rgba(43,209,231,.3);border-radius:999px;background:rgba(43,209,231,.08);color:var(--accent2);font:750 11px/1.2 ui-monospace,SFMono-Regular,Consolas,monospace;white-space:nowrap}.search{position:relative;width:min(500px,36vw);margin-left:auto}.search input{width:100%;height:42px;padding:0 52px 0 40px;border:1px solid var(--line);border-radius:11px;background:var(--bg2);color:var(--ink);outline:none}.search input:focus{border-color:var(--accent);box-shadow:var(--focus)}.search-icon{position:absolute;left:13px;top:5px;color:var(--muted);font-size:23px;z-index:1}.search kbd{position:absolute;right:11px;top:10px;padding:2px 7px;border:1px solid var(--line);border-radius:6px;color:var(--muted);background:var(--panel);font-size:11px}.search-results{display:none;position:absolute;top:49px;right:0;width:min(620px,82vw);max-height:70vh;overflow:auto;background:var(--panel);border:1px solid var(--line2);border-radius:13px;box-shadow:var(--shadow);padding:6px}.search-results.open{display:block}.search-results a{display:grid;gap:2px;padding:10px 12px;color:var(--ink);text-decoration:none;border-radius:9px}.search-results a:hover,.search-results a.selected{background:var(--panel3)}.search-results b{font-size:14px}.search-results small{color:var(--muted)}.search-empty{padding:22px;text-align:center;color:var(--muted)}.download-sdk{height:40px;display:inline-flex;align-items:center;gap:7px;padding:0 12px;border:1px solid rgba(43,209,231,.42);border-radius:10px;background:rgba(43,209,231,.1);color:var(--ink);text-decoration:none;font-weight:750;white-space:nowrap}.download-sdk:hover{background:rgba(43,209,231,.18)}.lang-switch{display:flex;padding:3px;border:1px solid var(--line);border-radius:10px;background:var(--bg2)}.lang-switch a{min-width:38px;padding:6px 8px;text-align:center;border-radius:7px;color:var(--muted);text-decoration:none;font-size:11px;font-weight:850}.lang-switch a.active{background:var(--accent);color:#031014}.theme-toggle,.icon-button{border:1px solid var(--line);background:var(--bg2);color:var(--ink);border-radius:10px;cursor:pointer}.theme-toggle{width:40px;height:40px}.theme-toggle:hover,.icon-button:hover{border-color:var(--accent)}.menu-toggle{display:none;width:42px;height:42px;padding:10px}.menu-toggle span{display:block;height:2px;margin:4px 0;background:currentColor}.shell{max-width:1920px;margin:auto;display:grid;grid-template-columns:280px minmax(0,1fr) 225px;gap:42px;padding:0 28px}.side{position:sticky;top:var(--top-h);height:calc(100vh - var(--top-h));overflow:auto;padding:25px 11px 55px 0;border-right:1px solid var(--line);scrollbar-width:thin}.side-head{display:none}.nav-group{margin:21px 10px 7px;color:var(--muted);font:800 10px/1.2 ui-monospace,SFMono-Regular,Consolas,monospace;text-transform:uppercase;letter-spacing:.14em}.nav-group:first-child{margin-top:0}.nav-link{display:flex;align-items:center;min-height:36px;margin:1px 8px 1px 0;padding:7px 11px;border-radius:8px;color:var(--muted);text-decoration:none;font-size:13.5px}.nav-link:hover{background:var(--panel2);color:var(--ink)}.nav-link.active{background:linear-gradient(90deg,rgba(43,209,231,.15),rgba(43,209,231,.03));color:var(--ink);box-shadow:inset 2px 0 var(--accent)}.side-footer{display:flex;gap:12px;margin:28px 10px;font-size:11px}.side-footer a{color:var(--muted)}.article{min-width:0;width:100%;max-width:1120px;padding:34px 0 70px}.article-meta{display:flex;gap:8px;color:var(--muted);font-size:12px;margin-bottom:8px}.breadcrumbs{display:flex;gap:8px;align-items:center;flex-wrap:wrap;color:var(--muted);font-size:12px;margin-bottom:13px}.breadcrumbs a{color:var(--muted);text-decoration:none}.article h1{font-size:clamp(34px,4vw,54px);line-height:1.08;letter-spacing:-.035em;margin:10px 0 18px;max-width:900px}.article h2{font-size:27px;line-height:1.25;letter-spacing:-.02em;margin:54px 0 17px;padding-top:4px}.article h3{font-size:18px;line-height:1.35;margin:25px 0 9px}.article p,.article li{max-width:900px}.lead{font-size:19px;line-height:1.65;color:var(--muted);margin:0 0 28px;max-width:900px!important}.article a:not(.button):not(.card a):not(.pager-card){text-underline-offset:3px}.article code{font:13.5px/1.55 ui-monospace,SFMono-Regular,Consolas,"Liberation Mono",monospace}.article p code,.article li code,.article td code{padding:2px 5px;border:1px solid var(--line);border-radius:5px;background:var(--panel2);color:var(--accent2)}pre{position:relative;overflow:auto;margin:18px 0 26px;padding:21px 22px;border:1px solid var(--line);border-radius:13px;background:var(--code);color:#dbe9ed;box-shadow:inset 0 1px rgba(255,255,255,.03)}pre code{font-size:13px;line-height:1.62}.code-copy{position:absolute;top:9px;right:9px;border:1px solid #33434b;border-radius:7px;background:#111b21;color:#aebdc3;padding:5px 9px;cursor:pointer;font-size:11px}.code-copy:hover{color:#fff;border-color:#4c6671}.toc{position:sticky;top:calc(var(--top-h) + 24px);height:max-content;max-height:calc(100vh - var(--top-h) - 45px);overflow:auto;margin-top:35px;padding-left:18px;border-left:1px solid var(--line);font-size:12px}.toc>b{display:block;margin-bottom:10px;color:var(--ink);font-size:11px;text-transform:uppercase;letter-spacing:.08em}.toc a{display:block;padding:5px 0 5px 10px;border-left:1px solid transparent;color:var(--muted);text-decoration:none;line-height:1.35}.toc a.sub{padding-left:21px;font-size:11px}.toc a.active{border-color:var(--accent);color:var(--accent2)}.cards,.grid3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px;margin:19px 0 30px}.card{position:relative;padding:22px;border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(145deg,var(--panel),var(--panel2));box-shadow:0 1px rgba(255,255,255,.025)}.card:hover{border-color:var(--line2);transform:translateY(-1px)}.card h3{margin:2px 0 8px}.card p{margin:0 0 13px;color:var(--muted)}.card a{font-weight:700;text-decoration:none}.card-number{display:block;color:var(--accent);font:900 12px/1 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.1em}.eyebrow,.kicker{color:var(--accent);font:850 11px/1.2 ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.12em}.hero{position:relative;overflow:hidden;display:grid;grid-template-columns:1.22fr .78fr;gap:35px;margin:0 0 25px;padding:clamp(28px,5vw,58px);border:1px solid rgba(43,209,231,.25);border-radius:22px;background:radial-gradient(circle at 90% 10%,rgba(43,209,231,.18),transparent 35%),linear-gradient(145deg,#081117,#0c222b 60%,#0a151b);box-shadow:var(--shadow)}.hero:after{content:"";position:absolute;width:400px;height:400px;right:-260px;bottom:-280px;border:1px solid rgba(43,209,231,.28);border-radius:50%;box-shadow:0 0 0 45px rgba(43,209,231,.025),0 0 0 90px rgba(43,209,231,.02)}.hero h1{font-size:clamp(42px,5vw,72px);color:#f2fbfd;margin:12px 0 19px;max-width:750px}.hero p{font-size:18px;color:#adc0c8;max-width:720px}.hero-actions{display:flex;gap:10px;margin:28px 0 22px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:9px 16px;border:1px solid var(--line2);border-radius:10px;color:var(--ink);background:var(--panel2);font-weight:800;text-decoration:none}.button.primary{border-color:var(--accent);background:var(--accent);color:#031015}.button:hover{transform:translateY(-1px)}.badges{display:flex;flex-wrap:wrap;gap:7px}.badges span{padding:5px 9px;border:1px solid rgba(137,242,255,.17);border-radius:999px;background:rgba(7,15,19,.38);color:#bcd0d6;font-size:11px}.hero-panel{align-self:center;position:relative;z-index:2;border:1px solid #29434e;border-radius:14px;background:#05090c;box-shadow:0 25px 60px rgba(0,0,0,.4);overflow:hidden;transform:perspective(1200px) rotateY(-3deg)}.hero-panel pre{margin:0;border:0;border-radius:0;padding:24px;min-height:210px}.terminal-head{height:38px;display:flex;align-items:center;gap:6px;padding:0 13px;border-bottom:1px solid #1f3038;color:#72858e;font-size:11px}.terminal-head i{width:8px;height:8px;border-radius:50%;background:#31434b}.terminal-head i:first-child{background:#e76d6d}.terminal-head i:nth-child(2){background:#dcb85a}.terminal-head i:nth-child(3){background:#53c787}.terminal-head span{margin-left:7px}.signal{display:flex;align-items:center;gap:8px;padding:10px 15px;border-top:1px solid #1f3038;color:#8ca0a8;font:11px/1.3 ui-monospace,monospace}.signal span{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 12px var(--green)}.stats{display:grid;grid-template-columns:repeat(4,1fr);margin:0 0 45px;border:1px solid var(--line);border-radius:14px;background:var(--panel)}.stats div{display:flex;flex-direction:column;padding:18px 22px;border-right:1px solid var(--line)}.stats div:last-child{border-right:0}.stats b{font-size:25px}.stats span{color:var(--muted);font-size:12px}.split{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center}.ticks{padding:0;list-style:none}.ticks li{position:relative;padding:5px 0 5px 28px}.ticks li:before{content:"✓";position:absolute;left:0;color:var(--green);font-weight:900}.text-link{font-weight:800;text-decoration:none}.figure{padding:15px;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel)}.figure img{display:block;width:100%;height:auto;border-radius:9px}.caption{padding:10px 5px 1px;color:var(--muted);font-size:11px}.cta{display:flex;align-items:center;justify-content:space-between;gap:30px;margin:55px 0 15px;padding:30px;border:1px solid rgba(43,209,231,.3);border-radius:18px;background:linear-gradient(120deg,rgba(43,209,231,.12),var(--panel))}.cta h2{margin:7px 0}.cta p{margin:0;color:var(--muted)}.note,.warning,.danger,.success,.version-callout{margin:22px 0;padding:15px 18px;border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:10px;background:rgba(43,209,231,.07)}.warning{border-left-color:var(--yellow);background:rgba(241,202,99,.07)}.danger{border-left-color:var(--red);background:rgba(255,125,125,.07)}.success{border-left-color:var(--green);background:rgba(83,227,154,.07)}.version-callout{border-color:rgba(43,209,231,.25);background:linear-gradient(90deg,rgba(43,209,231,.1),transparent)}table{width:100%;border-collapse:separate;border-spacing:0;margin:19px 0 30px;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--panel)}th,td{padding:12px 14px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line);border-right:1px solid var(--line)}th:last-child,td:last-child{border-right:0}tr:last-child td{border-bottom:0}th{background:var(--panel2);font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}td{font-size:13.5px}.steps{counter-reset:step}.step{counter-increment:step;display:grid;grid-template-columns:42px 1fr;gap:12px;margin:18px 0}.step:before{content:counter(step);display:grid;place-items:center;width:34px;height:34px;border:1px solid var(--accent);border-radius:50%;color:var(--accent);font-weight:900}.step h3{margin:3px 0}.journey{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:25px 0 35px}.journey a{display:flex;flex-direction:column;gap:5px;padding:17px;border:1px solid var(--line);border-radius:11px;background:var(--panel);color:var(--ink);text-decoration:none}.journey a:hover{border-color:var(--accent)}.journey span{color:var(--muted);font-size:12px}.checklist{display:grid;gap:9px;margin:18px 0}.checklist label{display:flex;align-items:center;gap:10px;padding:10px 13px;border:1px solid var(--line);border-radius:9px;background:var(--panel)}.checklist input{width:17px;height:17px;accent-color:var(--accent)}.command{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:8px 0;padding:10px 12px;border:1px solid var(--line);border-radius:9px;background:var(--code);color:#dbe9ed}.command code{overflow:auto;white-space:nowrap}.command button{border:1px solid #33434b;border-radius:7px;background:#111b21;color:#aebdc3;padding:5px 9px;cursor:pointer;font-size:11px}.glossary dl{display:grid;grid-template-columns:180px 1fr;margin:0;border-top:1px solid var(--line)}.glossary dt,.glossary dd{margin:0;padding:14px;border-bottom:1px solid var(--line)}.glossary dt{font-weight:850;color:var(--accent2)}.glossary dd{color:var(--muted)}.pager{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:60px}.pager-card{display:flex;flex-direction:column;padding:16px 18px;border:1px solid var(--line);border-radius:11px;background:var(--panel);color:var(--ink);text-decoration:none}.pager-card.next{text-align:right;grid-column:2}.pager-card span{color:var(--muted);font-size:11px}.pager-card:hover{border-color:var(--accent)}.footer{margin-top:35px;padding-top:19px;border-top:1px solid var(--line);color:var(--muted);font-size:11px}.overlay{display:none}.close-menu{display:none}.language-page{min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at 50% 10%,rgba(43,209,231,.2),transparent 35%),var(--bg)}.language-card{width:min(680px,calc(100% - 30px));padding:55px;text-align:center;border:1px solid var(--line2);border-radius:22px;background:var(--panel);box-shadow:var(--shadow)}.language-card h1{font-size:38px;line-height:1.25}.language-card h1 small{color:var(--muted);font-size:.55em}.language-card>div{display:flex;justify-content:center;gap:10px}.language-note{margin-top:35px;color:var(--muted);font-size:12px}
@media(max-width:1450px){.shell{grid-template-columns:255px minmax(0,1fr) 190px;gap:28px}.hero{grid-template-columns:1fr .75fr}.download-sdk span{display:none}.download-sdk{width:42px;justify-content:center}.cards,.grid3{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:1120px){.shell{grid-template-columns:240px minmax(0,1fr);gap:26px}.toc{display:none}.hero{grid-template-columns:1fr}.hero-panel{max-width:650px;transform:none}.search{width:min(420px,42vw)}.product{display:none}.split{grid-template-columns:1fr}.journey{grid-template-columns:repeat(2,1fr)}}
@media(max-width:820px){:root{--top-h:62px}.top{height:var(--top-h);padding:0 12px;gap:9px}.menu-toggle{display:block}.product,.version-badge,.search kbd,.download-sdk,.top>.lang-switch{display:none}.search{width:auto;flex:1;margin-left:0}.search input{height:40px}.shell{display:block;padding:0 16px}.side{position:fixed;z-index:80;top:0;left:0;width:min(330px,88vw);height:100vh;padding:14px 10px 40px 12px;background:var(--panel);border-right:1px solid var(--line2);transform:translateX(-105%);transition:transform .22s ease}.side.open{transform:translateX(0)}.side-head{display:flex;justify-content:space-between;align-items:center;padding:7px 9px 15px}.close-menu{display:block;width:36px;height:36px;font-size:22px}.overlay.open{display:block;position:fixed;inset:0;z-index:70;background:rgba(0,0,0,.6)}.article{padding-top:24px}.article h1{font-size:38px}.article h2{font-size:24px;margin-top:44px}.hero{margin-left:-8px;margin-right:-8px;padding:29px 22px;border-radius:17px}.hero h1{font-size:42px}.stats{grid-template-columns:repeat(2,1fr)}.stats div:nth-child(2){border-right:0}.stats div:nth-child(-n+2){border-bottom:1px solid var(--line)}.cards,.grid3{grid-template-columns:1fr}.journey{grid-template-columns:1fr}.cta{align-items:flex-start;flex-direction:column}.pager{grid-template-columns:1fr}.pager-card.next{grid-column:auto}.glossary dl{grid-template-columns:1fr}.glossary dt{border-bottom:0;padding-bottom:3px}.glossary dd{padding-top:3px}.language-card{padding:35px 22px}.language-card h1{font-size:29px}}
@media(max-width:520px){.logo{font-size:18px}.search-results{position:fixed;top:58px;left:8px;right:8px;width:auto}.hero h1{font-size:36px}.hero-actions{flex-direction:column}.button{width:100%}.stats{grid-template-columns:1fr}.stats div{border-right:0!important;border-bottom:1px solid var(--line)}.stats div:last-child{border-bottom:0}.article h1{font-size:34px}th,td{padding:10px}table{display:block;overflow-x:auto}.figure{padding:8px}.article-meta{display:none}}
@media print{.top,.side,.toc,.pager,.reading-progress,.download-sdk{display:none!important}.shell{display:block;padding:0}.article{max-width:none;padding:0;color:#111}.article a{color:#111}.hero{box-shadow:none}.footer{margin-top:20px}}
/* v0.5 wide-layout refinements */
@media(min-width:1451px){.feature-cards{grid-template-columns:repeat(4,minmax(0,1fr))}.article{max-width:1240px}.shell{grid-template-columns:255px minmax(0,1fr) 205px;gap:30px}}


/* v0.5.1 navigation hierarchy and section-link refinement */
.nav-group{
  margin:30px 10px 10px;
  color:var(--ink);
  font:850 12px/1.25 Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  text-transform:uppercase;
  letter-spacing:.11em;
  opacity:.9;
}
.nav-group:first-child{margin-top:2px}
.nav-group span{display:flex;align-items:center;gap:9px}
.nav-group span:after{content:"";height:1px;flex:1;background:var(--line)}
.nav-link{min-height:40px;padding:8px 12px;font-size:14px;line-height:1.35}
.nav-link.active{font-weight:700}
.anchored-heading{position:relative}
.heading-anchor{
  position:absolute;
  left:-27px;
  top:.13em;
  width:22px;
  height:28px;
  border-radius:6px;
  color:var(--muted);
  text-decoration:none!important;
  opacity:0;
  transition:opacity .15s ease,background .15s ease,color .15s ease;
}
.heading-anchor:before{
  content:"";
  position:absolute;
  left:6px;
  top:7px;
  width:9px;
  height:9px;
  border:1.7px solid currentColor;
  border-radius:4px;
  transform:rotate(-35deg);
}
.heading-anchor:after{
  content:"";
  position:absolute;
  left:9px;
  top:11px;
  width:8px;
  height:1.7px;
  border-radius:2px;
  background:currentColor;
  transform:rotate(-35deg);
}
.anchored-heading:hover>.heading-anchor,.heading-anchor:focus-visible{opacity:1}
.heading-anchor:hover{background:var(--panel2);color:var(--accent2)}
@media(max-width:820px){
  .nav-group{font-size:13px;margin-top:31px}
  .nav-link{min-height:44px;font-size:15px}
  .heading-anchor{position:relative;display:inline-block;left:auto;top:4px;margin-left:8px;opacity:.5}
}