:root{--bg:#0d1117;--panel:#151b23;--panel2:#1b232d;--text:#d7dde5;--muted:#8b97a6;--head:#fff;--line:#263140;--acc:#f0b429;--acc2:#ffd166;--accink:#1a1300;--code:#222c38}
:root[data-theme=light]{--bg:#fff;--panel:#f6f8fa;--panel2:#eef1f5;--text:#24292f;--muted:#5b6673;--head:#0b1220;--line:#d8dee6;--acc:#b7791f;--acc2:#8a5a10;--accink:#fff;--code:#eef1f5}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.7 -apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
a{color:var(--acc2);text-decoration:none}a:hover{text-decoration:underline}
.top{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:18px;height:64px;padding:0 20px;background:var(--panel);border-bottom:1px solid var(--line)}
.brand{color:var(--head);font-weight:600;font-size:17px;white-space:nowrap}.brand b{color:var(--acc)}.brand:hover{text-decoration:none}
.topnav{display:flex;gap:4px}.topnav a{color:var(--text);padding:8px 12px;border-radius:8px;font-size:14.5px}.topnav a:hover{background:var(--panel2);text-decoration:none}
.search{margin-left:auto;position:relative;width:min(340px,40vw)}
.search input{width:100%;height:40px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--text);padding:0 14px;font-size:15px}
.search input:focus{outline:2px solid var(--acc);border-color:transparent}
#results{position:absolute;right:0;top:46px;width:min(560px,92vw);max-height:70vh;overflow:auto;background:var(--panel);border:1px solid var(--line);border-radius:12px;box-shadow:0 18px 50px rgba(0,0,0,.45);padding:6px}
#results a{display:block;padding:10px 12px;border-radius:8px;color:var(--text)}#results a:hover,#results a.sel{background:var(--panel2);text-decoration:none}
#results strong{color:var(--head);display:block}#results small{color:var(--muted)}#results mark{background:rgba(240,180,41,.3);color:inherit;border-radius:3px}
.theme,.burger{background:none;border:1px solid var(--line);color:var(--text);width:40px;height:40px;border-radius:10px;font-size:18px;cursor:pointer}.burger{display:none}
.layout{display:grid;grid-template-columns:300px minmax(0,1fr) 250px;max-width:1500px;margin:0 auto}
.side{position:sticky;top:64px;height:calc(100vh - 64px);overflow:auto;padding:18px 12px 40px 16px;border-right:1px solid var(--line)}
.tree .home-link{display:block;padding:8px 12px;border-radius:8px;color:var(--head);font-weight:600}.tree .home-link.active,.tree .home-link:hover{background:var(--panel2);text-decoration:none}
.tree details{margin-top:4px}
.tree summary{cursor:pointer;list-style:none;padding:9px 12px;border-radius:8px;font-weight:600;color:var(--head);font-size:14.5px;display:flex;justify-content:space-between;gap:8px}
.tree summary::-webkit-details-marker{display:none}.tree summary::after{content:"›";transition:transform .15s;color:var(--muted);font-size:18px;line-height:1}
.tree details[open]>summary::after{transform:rotate(90deg)}.tree summary:hover{background:var(--panel2)}
.tree ul{list-style:none;margin:2px 0 8px 14px;padding:0 0 0 8px;border-left:1px solid var(--line)}
.tree li a{display:block;padding:6px 10px;border-radius:7px;color:var(--text);font-size:14px;line-height:1.4}.tree li a:hover{background:var(--panel2);text-decoration:none}
.tree li a.active{background:rgba(240,180,41,.14);color:var(--acc2);font-weight:600;box-shadow:inset 3px 0 0 var(--acc)}
.content{padding:30px 48px 70px;min-width:0}article{max-width:820px;margin:0 auto}
.crumbs{display:flex;flex-wrap:wrap;gap:8px;font-size:13.5px;color:var(--muted);margin-bottom:10px}.crumbs strong{color:var(--text);font-weight:500}
h1{color:var(--head);font-size:2.1rem;line-height:1.2;margin:.2em 0 .6em}
h2{color:var(--head);font-size:1.45rem;margin:2em 0 .6em;padding-top:.3em;border-top:1px solid var(--line);position:relative}
h2 .anchor{opacity:0;margin-left:10px;color:var(--muted);font-weight:400}h2:hover .anchor{opacity:1}
p{margin:.8em 0}ul,ol{padding-left:1.4em}li{margin:.35em 0}li::marker{color:var(--acc)}
strong{color:var(--head)}
.see{background:var(--panel);border:1px solid var(--line);border-left:3px solid var(--acc);border-radius:8px;padding:8px 14px;font-size:14.5px;margin:1em 0}.see .arrow{color:var(--acc);font-weight:700;margin-right:4px}
a.xref{font-weight:500}
figure{margin:1.4em 0;text-align:center}figure img{max-width:100%;max-height:640px;width:auto;border-radius:12px;border:1px solid var(--line)}
.tablewrap{overflow-x:auto;margin:1.2em 0;border:1px solid var(--line);border-radius:10px}
table{border-collapse:collapse;width:100%;font-size:14.5px}th{background:var(--panel2);color:var(--head);text-align:left}th,td{padding:10px 14px;border-bottom:1px solid var(--line);vertical-align:top}tr:last-child td{border-bottom:0}tbody tr:hover{background:var(--panel)}
kbd{background:var(--code);border:1px solid var(--line);border-bottom-width:2px;border-radius:5px;padding:1px 7px;font:13px ui-monospace,Consolas,monospace}
.toc{position:sticky;top:64px;height:calc(100vh - 64px);overflow:auto;padding:30px 16px}
.tochead{font-size:12.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:10px;font-weight:600}
.toc ul{list-style:none;margin:0;padding:0;border-left:1px solid var(--line)}.toc li{margin:0}
.toc a{display:block;padding:5px 12px;margin-left:-1px;border-left:2px solid transparent;color:var(--muted);font-size:13.5px;line-height:1.4}.toc a:hover{color:var(--text);text-decoration:none}.toc a.on{color:var(--acc2);border-left-color:var(--acc)}
.pn{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:3em}.pn a{display:block;border:1px solid var(--line);border-radius:12px;padding:14px 18px;color:var(--head);font-weight:600;background:var(--panel)}.pn a:hover{border-color:var(--acc);text-decoration:none}.pn small{display:block;color:var(--muted);font-weight:400;font-size:12.5px}.pn .next{text-align:right;grid-column:2}
.foot{margin-top:3em;padding-top:1.2em;border-top:1px solid var(--line);color:var(--muted);font-size:13px}
.hero{padding:34px 30px;margin-bottom:26px;border-radius:16px;background:linear-gradient(135deg,var(--panel2),var(--panel));border:1px solid var(--line)}
.hero h1{font-size:2.8rem;margin:.1em 0}.eyebrow{color:var(--acc);font-weight:600;font-size:13px;letter-spacing:.06em;text-transform:uppercase;margin:0}.lead{font-size:1.1rem;color:var(--text)}
.cta{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.btn{padding:10px 18px;border-radius:10px;border:1px solid var(--line);color:var(--head);font-weight:600;background:var(--bg)}.btn:hover{border-color:var(--acc);text-decoration:none}.btn.primary{background:var(--acc);color:var(--accink);border-color:var(--acc)}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px;margin-top:22px}.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 16px}.card h3{margin:0 0 6px;color:var(--head);font-size:1rem}.card ul{list-style:none;padding:0;margin:0}.card li{margin:2px 0;font-size:14px}
.scrim{display:none}
@media(max-width:1180px){.layout{grid-template-columns:280px minmax(0,1fr)}.toc{display:none}}
@media(max-width:860px){.burger{display:block}.topnav{display:none}.layout{grid-template-columns:1fr}.content{padding:22px 18px 60px}
.side{position:fixed;z-index:40;top:64px;left:0;width:min(320px,86vw);height:calc(100vh - 64px);background:var(--panel);transform:translateX(-100%);transition:transform .2s}
body.menu .side{transform:none}body.menu .scrim{display:block;position:fixed;inset:64px 0 0;background:rgba(0,0,0,.5);z-index:35}
.search{width:auto;flex:1;margin-left:0}.brand{font-size:15px}.hero h1{font-size:2rem}}
@media print{.top,.side,.toc,.pn,.scrim{display:none}.layout{display:block}body{background:#fff;color:#000}}

/* screenshots */
figure.shot{margin:1.4rem auto;max-width:340px;text-align:center}
figure.shot a.lb{display:block;cursor:zoom-in}
figure.shot img,figure.shot .cropbox{display:block;width:100%;border:1px solid var(--border,#8884);border-radius:8px;box-shadow:0 2px 10px rgba(0,0,0,.25);background-repeat:no-repeat}
figure.shot.crop{max-width:560px}
figure.shot figcaption{font-size:.85rem;opacity:.75;margin-top:.5rem}
#lbx{position:fixed;inset:0;background:rgba(0,0,0,.88);display:none;align-items:center;justify-content:center;z-index:9999;cursor:zoom-out}
#lbx.on{display:flex}#lbx img{max-width:94vw;max-height:94vh;border-radius:6px}