/* Portal 2.0: persistent engine navigation; shared reading surface. */
.engine-switch{display:flex;gap:3px;padding:4px;border:1px solid var(--line,#304254);border-radius:11px;background:var(--bg2,#111f2c);flex-shrink:0}
.engine-switch a{padding:7px 15px;border-radius:7px;font-size:13px;font-weight:800;color:var(--muted,#b5c6d6);text-decoration:none;white-space:nowrap}
.engine-switch a.active{background:var(--accent,#2bd1e7);color:#04131d}.engine-switch a:hover:not(.active){background:var(--panel3,#21384a);color:var(--ink,#edf5f7)}
.top{gap:12px}.top .search{min-width:120px;max-width:430px;flex:1}.top .search input{padding-left:14px;padding-right:14px}.top .product{font-size:13px}.release-notice{padding:11px 15px;margin:5px 0 22px;border:1px solid var(--line);border-left:3px solid var(--yellow);border-radius:8px;font-size:12px;color:var(--muted)}.release-notice b{color:var(--ink)}.article p{line-height:1.8}.article-meta{flex-wrap:wrap;gap:16px}.article h2{margin-top:38px}.article .snippet-label{font-size:12px;color:var(--muted)}.toc a{padding-top:7px;padding-bottom:7px}.skip{position:fixed;left:15px;top:-70px;z-index:100;background:var(--accent);color:#04131d;padding:12px;border-radius:8px}.skip:focus{top:8px}a:focus-visible,button:focus-visible{outline:2px solid var(--accent,#73d9ec);outline-offset:4px}.search-results a{display:block}.search-results small{display:block}.search-results mark{background:transparent;color:var(--accent)}.copy-button{display:block;margin-left:auto;margin-bottom:8px;font:12px system-ui;cursor:pointer;background:#152936;color:#dceef5;border:1px solid #405d6b;border-radius:6px;padding:5px 10px}.side-head button{line-height:1}
.landing{font:16px/1.7 system-ui,sans-serif;background:radial-gradient(ellipse at 75% 5%,#163341 0,transparent 55%),#091219;color:#eaf3f7;margin:0;min-height:100vh}.landing header{max-width:1050px;margin:auto;padding:30px 24px;text-align:right}.landing a{color:#88d9e7}.landing main{max-width:1050px;margin:55px auto;padding:0 24px 80px}.landing h1{font-size:clamp(48px,9vw,96px);letter-spacing:-.06em;line-height:1;margin:20px 0 25px}.landing .lead{color:#b0c1ce;max-width:730px;font-size:22px}.landing .eyebrow{font-size:12px;letter-spacing:.17em;color:#66cadc;font-weight:800}.engine-cards{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:40px 0}.engine-card{display:block;border:1px solid #304853;border-radius:18px;padding:30px;text-decoration:none;background:linear-gradient(125deg,#152935,#101c28);box-shadow:0 15px 60px #0003;transition:border-color .2s,transform .2s}.engine-card:hover{border-color:#67cee2;transform:translateY(-3px)}.engine-card span{font-size:11px;letter-spacing:.12em;color:#9eafbf}.engine-card h2{font-size:40px;line-height:1.2;color:#f2f9fb;margin:17px 0}.engine-card p{color:#a9bdca}.engine-card b{color:#76d6e7}.landing *{box-sizing:border-box}
@media(min-width:1450px){.shell{grid-template-columns:250px minmax(0,1fr) 185px;max-width:1580px;gap:30px}.article{max-width:1020px}.top{padding-left:max(22px,calc((100vw - 1550px)/2));padding-right:max(22px,calc((100vw - 1550px)/2))}}
@media(max-width:1120px){.top .product{display:none}.top .search{width:auto}}
@media(max-width:820px){:root{--top-h:114px}.top{height:114px;display:grid;grid-template-columns:36px 1fr auto 36px;grid-template-areas:'menu logo lang theme' 'engine engine search search';gap:9px;padding:9px 12px}.top .menu-toggle{display:block;width:36px;height:36px;grid-area:menu;padding:3px;font-size:22px}.top .logo{grid-area:logo;font-size:18px}.top>.lang-switch{display:flex;grid-area:lang}.top>.lang-switch a{min-width:29px;padding:5px}.top .theme-toggle{grid-area:theme;width:36px;height:36px}.top .engine-switch{grid-area:engine;justify-content:center;min-width:150px;max-width:210px}.engine-switch a{flex:1;text-align:center;padding:5px 12px}.top .search{grid-area:search;min-width:0;max-width:none;margin:0;width:100%}.top .search input{height:38px;font-size:12px;padding:5px 10px}.search-results{position:fixed;top:111px;left:8px;right:8px;width:auto;max-height:60vh}.side{top:0;height:100dvh;padding-top:15px}.article h1{font-size:34px}.article-meta{display:flex;font-size:11px}.release-notice{font-size:11px}.article h2{font-size:23px}.hero-actions{flex-wrap:wrap}.landing main{margin-top:30px}.landing .lead{font-size:18px}.engine-cards{gap:15px}.engine-card{padding:22px}.engine-card h2{font-size:33px}}
@media(max-width:520px){.engine-cards{grid-template-columns:1fr}.engine-card h2{margin:10px 0}.landing main{padding:0 20px 40px}.landing header{padding:20px}.article .hero-actions{flex-direction:column}.article pre{padding:14px}.article{overflow-wrap:anywhere}.top .engine-switch{max-width:180px}.top .search{min-width:115px}.article table{max-width:100%}}