@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@400;500;600;700&display=swap');
:root{color-scheme:light;--ink:#202122;--muted:#54595d;--border:#a2a9b1;--light:#eaecf0;--link:#202122;--sans:'IBM Plex Sans',Arial,sans-serif;--serif:'IBM Plex Sans',Arial,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--ink);font-family:var(--sans);font-size:14px;line-height:1.6}a{color:var(--link);text-decoration:underline;text-underline-offset:2px}a:hover{text-decoration-thickness:2px}button,input,select{font:inherit;color:inherit}.visually-hidden,.skip-link{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:focus{clip:auto;width:auto;height:auto;left:1rem;top:1rem;background:#fff;padding:.5rem;z-index:100}.site-header{min-height:74px;display:flex;align-items:center;gap:30px;padding:14px max(24px,calc((100vw - 1500px)/2));border-bottom:1px solid var(--light)}.brand{font:600 22px/1.1 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/* Indentation in the source denotes an expandable section hierarchy. */
.atlas-subsection{margin:1.15em 0}.atlas-subsection>summary{cursor:pointer;list-style:none;display:flex;align-items:baseline;gap:.45em;border-bottom:1px solid #a2a9b1}.atlas-subsection>summary::-webkit-details-marker{display:none}.atlas-subsection>summary:before{content:'▸';font:12px/1 var(--sans);flex:none}.atlas-subsection[open]>summary:before{content:'▾'}.article-body .atlas-subsection>summary h2,.article-body .atlas-subsection>summary h3{display:inline;border:0;padding:0;margin:0;font:400 23px/1.3 var(--serif)}.article-body .atlas-subsection .atlas-subsection>summary h2,.article-body .atlas-subsection .atlas-subsection>summary h3{font-size:18px;font-weight:600}.atlas-subsection .manuscript-children{padding-left:.75em}.manuscript-paragraph p{margin:.8em 0}.missing-authors{color:#54595d}.source-quote{color:#54595d}

/* chapters, hatnotes, cross-references, generated tables */
.chapter-number{display:inline-block;min-width:1.5em;color:var(--muted);font-weight:400}
.lead{color:var(--muted);font-size:15px;max-width:720px;margin:0 0 22px}
.group-summary{margin:0 0 26px}.group-summary h2{font:600 19px/1.3 var(--serif);margin:0 0 3px}.group-summary p{margin:0 0 6px;color:var(--muted);font-size:13px}
.group-summary ul{margin:0;padding-left:19px}.group-summary li{margin:3px 0}
.hatnote{font-style:italic;font-size:13px;color:var(--muted);padding:3px 0 3px 1.4em;margin:.2em 0 .5em}.hatnote a{color:var(--ink)}
.see-also{margin-top:35px}.see-also h2{font:400 25px/1.25 var(--serif);border-bottom:1px solid var(--border);margin:0 0 .5em;padding-bottom:.15em}
.see-also ul{margin:0;padding-left:20px}.see-also li{margin:6px 0}.see-also small{display:block;color:var(--muted);font-size:12px}
.domain-trail{font-size:13px;border:1px solid #c8ccd1;background:#f8f9fa;padding:7px 12px;margin:0 0 20px}.domain-trail>span{color:var(--muted);margin-right:6px}
.map-note{color:var(--muted);font-size:13px;max-width:760px}
.domain-grid{border-collapse:collapse;font-size:12px;width:100%;min-width:640px}.domain-grid th,.domain-grid td{border:1px solid #a2a9b1;padding:6px;vertical-align:top;text-align:left}
.domain-grid thead th{background:#eaecf0;font-weight:600;font-size:11px;line-height:1.3}.domain-grid tbody th{background:#f8f9fa;font-weight:600;font-size:11px;line-height:1.3}.domain-grid .all-domains{text-align:center;background:#fafafa}
.domain-grid td a,.domain-grid th a{text-decoration:none;display:block}.domain-grid td a:hover,.domain-grid th a:hover{text-decoration:underline}
.article-body .cell-link{display:block;color:inherit;text-decoration:underline dotted #8a9099;text-underline-offset:3px}.article-body .cell-link:hover{text-decoration:underline solid}
.export-option{display:flex;align-items:center;gap:6px;font-weight:400!important;min-height:38px}
/* figures: the paper's figure, a caption written for this page, then the original caption in quotes */
.paper-figure{width:min(100%,640px);padding:10px;border:1px solid #c8ccd1;background:#f8f9fa;margin:22px 0}
.paper-figure .figure-image{display:block;background:#fff;text-decoration:none}.paper-figure img{display:block;max-width:100%;max-height:560px;object-fit:contain;margin:auto}
.paper-figure figcaption{font:13px/1.5 var(--sans);padding:10px 2px 1px}.figure-summary{margin:0 0 9px;font-size:14px;line-height:1.5}
.source-caption{margin:0 0 8px;padding:0 0 0 10px;border-left:3px solid #c8ccd1;color:var(--muted);font-size:12px;line-height:1.5}.source-caption p{margin:0}
.paper-figure .credit{margin:0;font-size:11px;color:var(--muted)}
.figure-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;align-items:start;margin:22px 0}.figure-row .paper-figure{width:100%;min-width:0;margin:0}
@media(max-width:720px){.paper-figure{padding:6px}.figure-row{gap:8px}.figure-row .figure-summary{font-size:12px}.figure-row .source-caption{font-size:10px}.figure-row .credit{font-size:9px}}

/* home overview figure */
.content-body:has(>.home-figure){max-width:1100px}.home-figure{margin:0 0 30px;padding:0;width:100%}.home-figure-full{display:block;margin:8px 2px 0;font-size:12px;color:var(--muted)}.home-figure svg{display:block;width:100%;height:auto;border-radius:10px;background:#0b141c}
.home-figure a,.home-figure text{text-decoration:none}.home-figure .hf-link{cursor:pointer}.home-figure .hf-link:hover rect,.home-figure .hf-link:focus rect{stroke:#cfe9e4;stroke-opacity:.45}.home-figure .hf-link:hover{opacity:.88}.home-figure .hf-link:focus{outline:none}.home-figure .hf-link:focus-visible{outline:2px solid #202122}
@media(max-width:720px){.home-figure{overflow-x:auto;-webkit-overflow-scrolling:touch}.home-figure svg{min-width:960px}}
.uc-tag{display:inline-block;margin-left:6px;padding:0 6px;border:1px solid #c9a227;border-radius:9px;background:#fbf4dc;color:#7a5d00;font:500 10px/16px var(--sans);vertical-align:1px;white-space:nowrap}h2 .uc-tag,h3 .uc-tag{font-size:11px}
.uc-note{margin:0 0 18px;padding:9px 12px;border-left:3px solid #c9a227;background:#fbf4dc;color:#4a3b00;font-size:13px}
/* Dark mode: the default. html[data-theme] is set before first paint by the inline script in index.html; the header switch flips it. */
.theme-switch{margin-left:auto;display:flex;align-items:center;gap:8px;border:0;background:none;padding:4px 0;cursor:pointer;font-size:13px;color:var(--muted)}.theme-switch .track{position:relative;width:38px;height:22px;border-radius:11px;background:#c8ccd1;transition:background .15s}.theme-switch .track::after{content:'';position:absolute;top:3px;left:3px;width:16px;height:16px;border-radius:50%;background:#fff;transition:transform .15s}.theme-switch[aria-checked=true] .track{background:#4f8f86}.theme-switch[aria-checked=true] .track::after{transform:translateX(16px)}.theme-switch:focus-visible{outline:2px solid var(--ink);outline-offset:3px}
html[data-theme=dark]{color-scheme:dark;--ink:#dfe6e9;--muted:#9aa7ae;--border:#3d4a52;--light:#26323a;--link:#e6edf0;--panel:#141f27;--panel2:#1b2832}
html[data-theme=dark] body{background:#0e161c}
html[data-theme=dark] .skip-link:focus,html[data-theme=dark] .search-form input,html[data-theme=dark] .export-controls select{background:#0b1217}
html[data-theme=dark] .search-form input:focus{outline-color:#9aa7ae}
html[data-theme=dark] .search-form button,html[data-theme=dark] .export-controls button,html[data-theme=dark] .domain-trail,html[data-theme=dark] .domain-grid tbody th,html[data-theme=dark] .paper-figure{background:var(--panel)}
html[data-theme=dark] .search-form button:hover,html[data-theme=dark] .export-controls button:hover,html[data-theme=dark] .article-body th,html[data-theme=dark] .domain-grid thead th{background:var(--panel2)}
html[data-theme=dark] .domain-grid .all-domains{background:#111b22}
html[data-theme=dark] .nav-toggle::before{border-left-color:#9aa7ae}html[data-theme=dark] .nav-toggle:hover::before{border-left-color:#fff}
html[data-theme=dark] .nav-kids,html[data-theme=dark] .domain-trail,html[data-theme=dark] .paper-figure,html[data-theme=dark] .source-caption{border-color:var(--border)}
html[data-theme=dark] .article-body th,html[data-theme=dark] .article-body td,html[data-theme=dark] .domain-grid th,html[data-theme=dark] .domain-grid td,html[data-theme=dark] .atlas-subsection>summary{border-color:var(--border)}
html[data-theme=dark] .page-tabs a.active{border-bottom-color:var(--ink)}
html[data-theme=dark] .citation-needed,html[data-theme=dark] .missing-authors,html[data-theme=dark] .source-quote{color:var(--muted)}
html[data-theme=dark] .paper-figure .figure-image{background:#fff;border-radius:2px}
html[data-theme=dark] .home-figure .hf-link:focus-visible{outline-color:#fff}
html[data-theme=dark] .uc-tag{background:#3a3010;border-color:#8a7020;color:#f0d77a}
html[data-theme=dark] .uc-note{background:#2a2310;color:#f0dfa6}
@media(max-width:720px){html[data-theme=dark] .sidebar{background:#0e161c}.theme-switch .label{display:none}}
.home-figure-credit{margin:4px 2px 0;font-size:11px;line-height:1.5;color:var(--muted)}.home-figure-credit a{color:var(--muted)}
.home-intro{font-size:16px;line-height:1.65;margin:0 0 24px;max-width:860px}
/* larger contents and tabs */.sidebar-heading{font-size:17px}.nav-link{font-size:14px}.depth-0>.nav-row>.nav-link,.kind-chapter .kind-group>.nav-row>.nav-link{font-size:15.5px}.nav-toggle{height:30px}.nav-toggle::before{top:11px}.page-tabs{font-size:15.5px;height:42px}.page-tabs a{padding:10px 0 9px}
.brand{display:flex;align-items:center;gap:12px}.brand-logo{width:44px;height:44px;flex:none}@media(max-width:720px){.brand-logo{width:32px;height:32px}}
.site-footer{font-size:13px}.site-footer a{color:var(--muted)}