:root{--bg:#fff;--bg2:#f5f5f5;--fg:#111;--muted:#666;--line:#e0e0e0;--accent:#111;--accent-bg:#ececec;--code-bg:#f2f2f2;--note:#f2f2f2;--note-b:#555;--tip:#f2f2f2;--tip-b:#333;--warn:#f2f2f2;--warn-b:#777;--imp:#ececec;--imp-b:#111;--radius:10px}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#0d0d0d;--bg2:#161616;--fg:#eee;--muted:#9a9a9a;--line:#2a2a2a;--accent:#fff;--accent-bg:#222;--code-bg:#1a1a1a;--note:#1a1a1a;--note-b:#aaa;--tip:#1a1a1a;--tip-b:#ccc;--warn:#1a1a1a;--warn-b:#888;--imp:#202020;--imp-b:#fff}}
:root[data-theme="dark"]{--bg:#0d0d0d;--bg2:#161616;--fg:#eee;--muted:#9a9a9a;--line:#2a2a2a;--accent:#fff;--accent-bg:#222;--code-bg:#1a1a1a;--note:#1a1a1a;--note-b:#aaa;--tip:#1a1a1a;--tip-b:#ccc;--warn:#1a1a1a;--warn-b:#888;--imp:#202020;--imp-b:#fff}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:76px}
body{margin:0;background:var(--bg);color:var(--fg);font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;-webkit-text-size-adjust:100%}
a{color:var(--accent);text-underline-offset:2px}a:hover{text-decoration-thickness:2px}
.skip{position:absolute;left:-999px;top:0;background:var(--accent);color:var(--bg);padding:8px 12px;z-index:100}.skip:focus{left:8px;top:8px}
.top{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:20px;padding:0 20px;height:60px;background:var(--bg);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--fg);text-decoration:none;white-space:nowrap}.brand .sub{color:var(--muted);font-weight:500}.brand{font-family:"Instrument Serif",Georgia,serif;font-style:italic;font-weight:400;font-size:1.4em;letter-spacing:-.015em;color:var(--fg)}
.mark{display:none}
.tabs-top{display:flex;gap:4px;flex:1}.tabs-top a{padding:8px 12px;border-radius:8px;color:var(--muted);text-decoration:none;font-weight:500}.tabs-top a:hover{background:var(--bg2);color:var(--fg)}.tabs-top a[aria-current]{color:var(--fg);background:var(--bg2)}
.tools{display:flex;align-items:center;gap:10px}.search{position:relative}
#q{width:240px;max-width:40vw;padding:8px 12px;border:1px solid var(--line);border-radius:8px;background:var(--bg2);color:var(--fg);font:inherit;font-size:14px}#q:disabled{opacity:.5}
.results{position:absolute;right:0;top:44px;width:min(440px,90vw);max-height:70vh;overflow:auto;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 12px 32px rgba(0,0,0,.18)}
.results a{display:block;padding:10px 14px;text-decoration:none;color:var(--fg);border-bottom:1px solid var(--line)}.results a:last-child{border:0}.results a:hover,.results a:focus{background:var(--bg2)}.results b{display:block}.results span{font-size:13px;color:var(--muted)}
.icon{border:1px solid var(--line);background:var(--bg2);color:var(--fg);border-radius:8px;padding:7px 10px;font:inherit;font-size:13px;cursor:pointer}
.layout{display:grid;grid-template-columns:260px minmax(0,1fr) 220px;max-width:1360px;margin:0 auto}
.side{position:sticky;top:60px;align-self:start;max-height:calc(100vh - 60px);overflow:auto;padding:20px 12px 40px 20px;font-size:14.5px}.side .menu{display:none}
.group{margin:0 0 6px}.group summary{cursor:pointer;font-weight:600;padding:6px 8px;border-radius:6px;list-style:none}.group summary::-webkit-details-marker{display:none}.group summary::after{content:"+";float:right;color:var(--muted)}.group[open] summary::after{content:"-"}
.group ul{list-style:none;margin:0 0 8px;padding:0 0 0 8px;border-left:1px solid var(--line)}.group li a{display:block;padding:4px 10px;color:var(--muted);text-decoration:none;border-radius:6px}.group li a:hover{color:var(--fg);background:var(--bg2)}.group li a[aria-current]{color:var(--accent);background:var(--accent-bg);font-weight:600}
main{padding:32px 40px 80px;min-width:0}article{max-width:780px}
h1{font-size:2.1rem;line-height:1.2;margin:0 0 .6em;letter-spacing:-.01em}h2{font-size:1.45rem;margin:2.2em 0 .6em;padding-top:.4em;border-top:1px solid var(--line)}h3{font-size:1.15rem;margin:1.8em 0 .5em}h4{margin:1.4em 0 .4em}
h2,h3,h4{line-height:1.3;position:relative}.anchor{position:absolute;left:-1.1em;color:var(--muted);text-decoration:none;opacity:0;font-weight:400}h2:hover .anchor,h3:hover .anchor,h4:hover .anchor,.anchor:focus{opacity:1}
p,ul,ol{margin:0 0 1em}li{margin:.25em 0}hr{border:0;border-top:1px solid var(--line);margin:2em 0}
code{font:13.5px/1.5 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:var(--code-bg);padding:.12em .38em;border-radius:5px}
.code{position:relative;margin:0 0 1.2em}.code pre{margin:0;padding:14px 16px;background:var(--code-bg);border:1px solid var(--line);border-radius:var(--radius);overflow:auto}.code pre code{background:none;padding:0;font-size:13px;line-height:1.55}
.copy{position:absolute;right:8px;top:8px;border:1px solid var(--line);background:var(--bg);color:var(--muted);border-radius:6px;padding:3px 9px;font:inherit;font-size:12px;cursor:pointer;opacity:0;transition:opacity .15s}.code:hover .copy,.copy:focus{opacity:1}
.table-wrap{overflow-x:auto;margin:0 0 1.2em;border:1px solid var(--line);border-radius:var(--radius)}table{border-collapse:collapse;width:100%;font-size:14.5px}th,td{padding:9px 13px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}th{background:var(--bg2);font-weight:600;white-space:nowrap}tr:last-child td{border-bottom:0}td code{white-space:nowrap}
.callout{margin:0 0 1.2em;padding:12px 16px;border-radius:var(--radius);border-left:4px solid var(--note-b);background:var(--note)}.callout-tip{border-color:var(--tip-b);background:var(--tip)}.callout-warning{border-color:var(--warn-b);background:var(--warn)}.callout-important{border-color:var(--imp-b);background:var(--imp)}
.tabs{margin:0 0 1.2em}.tabs>input{position:absolute;opacity:0;pointer-events:none}.tabs>label{display:inline-block;padding:7px 14px;margin-right:2px;border:1px solid var(--line);border-bottom:0;border-radius:8px 8px 0 0;background:var(--bg2);color:var(--muted);font-size:13.5px;font-weight:600;cursor:pointer}
.tabs .panel{display:none}.tabs .panel .code{margin:0}.tabs .panel .code pre{border-top-left-radius:0}
.tabs>input:nth-of-type(1):checked~.panels .p-0,.tabs>input:nth-of-type(2):checked~.panels .p-1,.tabs>input:nth-of-type(3):checked~.panels .p-2,.tabs>input:nth-of-type(4):checked~.panels .p-3{display:block}
.tabs>input:nth-of-type(1):checked~label:nth-of-type(1),.tabs>input:nth-of-type(2):checked~label:nth-of-type(2),.tabs>input:nth-of-type(3):checked~label:nth-of-type(3),.tabs>input:nth-of-type(4):checked~label:nth-of-type(4){background:var(--code-bg);color:var(--accent)}
.tabs>input:focus-visible+label{outline:2px solid var(--accent)}
.toc{position:sticky;top:60px;align-self:start;max-height:calc(100vh - 60px);overflow:auto;padding:32px 20px;font-size:13.5px}.toc p{margin:0 0 8px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;font-size:12px}.toc ul{list-style:none;margin:0;padding:0}.toc a{display:block;padding:3px 0;color:var(--muted);text-decoration:none}.toc a:hover{color:var(--accent)}.toc .l3{padding-left:12px}
.page-foot{max-width:780px;margin-top:64px;padding-top:20px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
body.home h1{font-size:2.6rem}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin:1.4em 0}.cards a{display:block;padding:18px;border:1px solid var(--line);border-radius:var(--radius);background:var(--bg2);text-decoration:none;color:var(--fg)}.cards a:hover{border-color:var(--accent)}.cards b{display:block;margin-bottom:4px}
@media (max-width:1100px){.layout{grid-template-columns:240px minmax(0,1fr)}.toc{display:none}}
@media (max-width:760px){.top{padding:0 16px;gap:10px;flex-wrap:wrap;height:auto;min-height:60px}.tabs-top{order:3;flex:1 1 100%;overflow-x:auto;padding-bottom:6px}.layout{display:block}.side{position:static;max-height:none;padding:8px 16px;border-bottom:1px solid var(--line)}.side .menu{display:block;width:100%;padding:10px;border:1px solid var(--line);border-radius:8px;background:var(--bg2);color:var(--fg);font:inherit}.side .side-body{display:none;padding-top:10px}.side.open .side-body{display:block}main{padding:24px 16px 60px}h1{font-size:1.7rem}#q{width:150px}.anchor{display:none}}