:root{--surface-1:#fcfcfb;--surface-2:#f4f4f1;--plane:#f9f9f7;--ink-1:#0b0b0b;--ink-2:#52514e;--ink-3:#898781;--grid:#e1e0d9;--axis:#c3c2b7;--ring:rgba(11,11,11,.10);--accent:#2a78d6;--accent-wash:rgba(42,120,214,.08);--critical:#d03b3b;--shadow:0 1px 2px rgba(11,11,11,.04),0 10px 36px rgba(11,11,11,.08);--sidebar:274px;--toc:230px;--radius:10px;color-scheme:light}
:root[data-theme=dark]{--surface-1:#1a1a19;--surface-2:#222220;--plane:#0d0d0d;--ink-1:#fff;--ink-2:#c3c2b7;--ink-3:#898781;--grid:#2c2c2a;--axis:#383835;--ring:rgba(255,255,255,.10);--accent:#3987e5;--accent-wash:rgba(57,135,229,.14);--critical:#e15a5a;--shadow:0 1px 2px rgba(0,0,0,.4),0 12px 40px rgba(0,0,0,.35);color-scheme:dark}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;background:var(--plane);color:var(--ink-1);font:14px/1.55 system-ui,-apple-system,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}button,input{font:inherit}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;z-index:300;top:8px;left:8px;transform:translateY(-150%);padding:8px 12px;background:var(--accent);color:white;border-radius:8px}.skip-link:focus{transform:none}a{color:inherit}button,a,input{outline-offset:3px}button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid var(--accent)}[hidden]{display:none!important}.modal-open{overflow:hidden}
#loadbar{position:fixed;z-index:250;top:0;left:0;right:0;height:2px;opacity:0;overflow:hidden;transition:opacity .15s}#loadbar.on{opacity:1}#loadbar:after{content:"";position:absolute;width:38%;height:100%;background:linear-gradient(90deg,transparent,var(--accent),transparent);animation:loading 1s infinite}
.app{display:grid;grid-template-columns:var(--sidebar) minmax(0,1fr) var(--toc);min-height:100vh}.sidebar{position:sticky;top:0;height:100vh;padding:22px 15px 16px;border-right:1px solid var(--ring);background:var(--surface-1);display:flex;flex-direction:column;gap:20px;overflow-y:auto}.brand{display:flex;align-items:center;gap:10px;padding:0 7px}.brand-mark{display:grid;place-items:center;width:30px;height:30px;flex:none;border-radius:8px;background:var(--accent);color:#fff;font-weight:700;font-size:12px}.brand b{display:block;font-size:14px;letter-spacing:-.01em}.brand small{display:block;color:var(--ink-3);font-size:11px;margin-top:-2px}.sidebar-close{display:none;margin-left:auto}.icon-button{appearance:none;border:0;background:transparent;color:var(--ink-1);cursor:pointer;width:38px;height:38px;border-radius:8px;font-size:20px}.icon-button:hover{background:var(--accent-wash)}.search-trigger{appearance:none;display:flex;align-items:center;gap:9px;width:100%;border:1px solid var(--ring);border-radius:9px;padding:8px 10px;background:var(--plane);color:var(--ink-2);cursor:pointer;text-align:left}.search-trigger:hover{border-color:var(--axis);color:var(--ink-1)}.search-trigger kbd{margin-left:auto}.search-trigger kbd,.search-field kbd{border:1px solid var(--ring);border-radius:5px;padding:1px 5px;color:var(--ink-3);font:10px/1.6 inherit;background:var(--surface-1)}.tree{display:flex;flex-direction:column;gap:2px}.tree a{display:block;text-decoration:none;color:var(--ink-2);border-radius:7px;padding:7px 9px;padding-left:calc(9px + var(--depth,0)*16px)}.tree a:hover{background:var(--accent-wash);color:var(--ink-1)}.tree a[aria-current=page]{background:var(--accent-wash);color:var(--ink-1);font-weight:600}.tree-section-row{display:grid;grid-template-columns:25px 1fr;align-items:center}.tree-section-row>a{padding-left:calc(var(--depth,0)*16px)}.tree-toggle{appearance:none;border:0;background:none;color:var(--ink-3);cursor:pointer;width:25px;height:30px;font-size:20px;line-height:1;transition:transform .15s}.tree-toggle[aria-expanded=true]{transform:rotate(90deg)}.tree-children{display:flex;flex-direction:column}.sidebar-footer{display:flex;flex-direction:column;gap:4px;margin-top:auto}.quiet-button{appearance:none;border:0;background:transparent;color:var(--ink-2);padding:8px 10px;border-radius:8px;text-align:left;cursor:pointer}.quiet-button:hover{background:var(--accent-wash);color:var(--ink-1)}
.mobile-header{display:none}.content-shell{min-width:0;padding:42px clamp(28px,5vw,74px) 80px}.article{max-width:820px;margin:0 auto}.article-head{padding-bottom:31px;border-bottom:1px solid var(--grid);margin-bottom:32px}.breadcrumbs{display:flex;gap:7px;align-items:center;flex-wrap:wrap;font-size:12px;color:var(--ink-3);margin-bottom:24px}.breadcrumbs a{text-decoration:none}.breadcrumbs a:hover{color:var(--ink-1)}.article h1{font-size:clamp(32px,4vw,46px);line-height:1.08;letter-spacing:-.035em;margin:0 0 14px;font-weight:650}.lead{max-width:680px;color:var(--ink-2);font-size:17px;line-height:1.55;margin:0 0 20px}.meta{display:flex;flex-wrap:wrap;gap:8px 20px;color:var(--ink-3);font-size:12px}.markdown-body{font-size:16px;line-height:1.72}.markdown-body h2{font-size:27px;line-height:1.25;letter-spacing:-.02em;margin:48px 0 17px}.markdown-body h3{font-size:20px;margin:34px 0 12px}.markdown-body h4{font-size:16px;margin:27px 0 8px}.markdown-body p,.markdown-body ul,.markdown-body ol{margin:0 0 18px}.markdown-body li+li{margin-top:6px}.markdown-body a{color:var(--accent);text-decoration-thickness:1px;text-underline-offset:3px}.markdown-body blockquote{margin:24px 0;padding:12px 18px;border-left:3px solid var(--accent);background:var(--accent-wash);color:var(--ink-2);border-radius:0 8px 8px 0}.markdown-body blockquote p:last-child{margin:0}.markdown-body hr{border:0;border-top:1px solid var(--grid);margin:40px 0}.markdown-body img{max-width:100%;height:auto;border-radius:var(--radius);border:1px solid var(--ring)}.markdown-body code:not(.hljs){font:13px ui-monospace,SFMono-Regular,Consolas,monospace;padding:2px 5px;background:var(--surface-2);border:1px solid var(--ring);border-radius:5px}.markdown-body table{width:100%;border-collapse:collapse;font-size:14px;display:block;overflow-x:auto;margin:24px 0}.markdown-body th{text-align:left;color:var(--ink-2);font-size:12px;text-transform:uppercase;letter-spacing:.04em}.markdown-body th,.markdown-body td{padding:10px 12px;border-bottom:1px solid var(--grid);min-width:120px}.markdown-body tr:hover td{background:var(--accent-wash)}.code-block{position:relative;margin:24px 0;border:1px solid var(--ring);border-radius:var(--radius);overflow:hidden;background:#111}.code-label{padding:7px 12px;border-bottom:1px solid rgba(255,255,255,.08);font-size:11px;color:#999;text-transform:uppercase}.code-block pre{margin:0;padding:17px;overflow:auto}.code-block code{font:13px/1.65 ui-monospace,SFMono-Regular,Consolas,monospace}.mermaid-source,.mermaid-diagram,.diagram-error,.diagram-note{margin:28px 0;padding:18px;border:1px solid var(--ring);background:var(--surface-1);border-radius:var(--radius);overflow:auto;text-align:center}.mermaid-diagram svg{display:block;max-width:100%;height:auto;margin:auto}.diagram-error{color:var(--critical)}.diagram-note{color:var(--ink-3)}.page-nav{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:56px;padding-top:24px;border-top:1px solid var(--grid)}.page-nav a{display:flex;flex-direction:column;padding:14px 16px;border:1px solid var(--ring);border-radius:var(--radius);text-decoration:none}.page-nav a:hover{border-color:var(--accent);background:var(--accent-wash)}.page-nav small{color:var(--ink-3);margin-bottom:4px}.page-nav .next{text-align:right}.recent{margin-top:54px;padding-top:32px;border-top:1px solid var(--grid)}.recent h2{font-size:25px;margin:5px 0 18px}.section-kicker{font-size:11px;color:var(--accent);text-transform:uppercase;letter-spacing:.08em;font-weight:650}.recent-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.recent-grid a{position:relative;display:flex;flex-direction:column;min-height:130px;padding:16px;border:1px solid var(--ring);border-radius:var(--radius);text-decoration:none;background:var(--surface-1)}.recent-grid a:hover{border-color:var(--axis);transform:translateY(-1px);box-shadow:var(--shadow)}.recent-grid span{font-weight:650}.recent-grid small{color:var(--ink-2);margin:5px 0 14px}.recent-grid time{margin-top:auto;color:var(--ink-3);font-size:11px}.toc{position:sticky;top:0;height:100vh;padding:50px 24px 30px 0;overflow:auto}.toc-inner{border-left:1px solid var(--grid);padding-left:18px}.toc h2{font-size:11px;text-transform:uppercase;letter-spacing:.07em;color:var(--ink-3);margin:0 0 12px}.toc nav{display:flex;flex-direction:column;gap:2px}.toc a{font-size:12px;line-height:1.35;color:var(--ink-3);text-decoration:none;padding:5px 0}.toc a:hover,.toc a[aria-current]{color:var(--ink-1)}.toc a[aria-current]{font-weight:600}.toc-level-3{padding-left:12px!important}.article-enter{animation:article-in .24s ease both}.error-state{text-align:center;padding:15vh 20px}.error-state>span{display:inline-grid;place-items:center;width:42px;height:42px;border:1px solid var(--critical);color:var(--critical);border-radius:50%;font-size:20px}.error-state h1{font-size:28px;margin:16px 0 8px}.error-state p{color:var(--ink-2)}.error-state a{color:var(--accent)}
.login-veil{position:fixed;inset:0;z-index:200;display:none;place-items:center;padding:20px;background:var(--plane)}.login-veil.on{display:grid}.login-card{width:min(100%,380px);padding:30px;border:1px solid var(--ring);border-radius:14px;background:var(--surface-1);box-shadow:var(--shadow)}.login-brand{display:flex;align-items:center;gap:10px;font-weight:650;margin-bottom:38px}.login-card h1{font-size:25px;letter-spacing:-.02em;margin:0 0 7px}.login-card>p{color:var(--ink-2);margin:0 0 24px}.login-card label{display:block;font-size:12px;color:var(--ink-2);margin-bottom:6px}.login-card input{width:100%;padding:11px 12px;border:1px solid var(--ring);border-radius:8px;background:var(--plane);color:var(--ink-1)}.primary-button{width:100%;margin-top:12px;padding:11px;border:0;border-radius:8px;background:var(--accent);color:#fff;font-weight:600;cursor:pointer}.primary-button:disabled{opacity:.6}.login-card .form-error{min-height:21px;color:var(--critical);font-size:12px;margin:9px 0 0}
.search-overlay{position:fixed;inset:0;z-index:220;display:grid;place-items:start center;padding-top:min(14vh,120px);opacity:0;transition:opacity .16s}.search-overlay.open{opacity:1}.search-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.62);backdrop-filter:blur(3px)}.search-dialog{position:relative;width:min(94vw,650px);max-height:min(70vh,650px);display:flex;flex-direction:column;border:1px solid var(--ring);border-radius:13px;background:var(--surface-1);box-shadow:0 20px 70px rgba(0,0,0,.45);overflow:hidden;transform:translateY(-8px);transition:transform .16s}.open .search-dialog{transform:none}.search-field{display:flex;align-items:center;gap:12px;padding:15px 17px;border-bottom:1px solid var(--ring);font-size:20px}.search-field input{min-width:0;flex:1;border:0;outline:0;background:transparent;color:var(--ink-1);font-size:16px}.search-results{padding:8px;overflow:auto;min-height:80px}.search-results a{display:block;padding:11px 12px;border-radius:8px;text-decoration:none}.search-results a[aria-selected=true]{background:var(--accent-wash)}.search-results strong{font-size:14px}.search-results p{font-size:12px;color:var(--ink-2);margin:3px 0 0}.search-results mark{color:inherit;background:rgba(235,104,52,.3);border-radius:2px}.search-empty{padding:28px;text-align:center;color:var(--ink-3)}.search-dialog footer{display:flex;gap:18px;padding:9px 16px;border-top:1px solid var(--ring);font-size:10px;color:var(--ink-3)}
@media(max-width:1100px){.app{grid-template-columns:250px minmax(0,1fr)}.toc{display:none}.content-shell{padding-left:40px;padding-right:40px}}
@media(max-width:760px){html{scroll-padding-top:72px}.app{display:block}.mobile-header{position:sticky;top:0;z-index:80;height:58px;display:flex;align-items:center;justify-content:space-between;padding:0 10px;border-bottom:1px solid var(--ring);background:color-mix(in srgb,var(--plane) 88%,transparent);backdrop-filter:blur(12px)}.mobile-brand{text-decoration:none;font-weight:650;font-size:13px}.sidebar{position:fixed;z-index:110;inset:0 auto 0 0;width:min(88vw,320px);height:100vh;transform:translateX(-102%);box-shadow:var(--shadow);transition:transform .22s ease}.sidebar.open{transform:none}.sidebar-close{display:block}.drawer-backdrop{position:fixed;z-index:100;inset:0;background:rgba(0,0,0,.58)}.content-shell{padding:26px 20px 60px}.article-head{margin-bottom:25px;padding-bottom:24px}.breadcrumbs{margin-bottom:18px}.article h1{font-size:32px}.lead{font-size:15px}.markdown-body{font-size:15px;line-height:1.68}.markdown-body h2{font-size:24px;margin-top:39px}.markdown-body h3{font-size:19px}.recent-grid{grid-template-columns:1fr}.page-nav{grid-template-columns:1fr}.page-nav>span{display:none}.page-nav .next{text-align:left}.login-card{padding:24px}.search-overlay{padding-top:6vh}.search-dialog{max-height:82vh}.search-dialog footer{display:none}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}
@keyframes loading{from{transform:translateX(-100%)}to{transform:translateX(300%)}}@keyframes article-in{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}