:root{--ink:#172437;--muted:#5d6b7e;--blue:#344dce;--blue-soft:#edf0ff;--line:#e0e5ed;--paper:#fff;--surface:#f5f7fa;--mono:ui-monospace,SFMono-Regular,Consolas,monospace;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);font-size:16px;line-height:1.65}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}a:hover{color:var(--blue)}button,a{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #e4ad25;outline-offset:5px}img{max-width:100%;height:auto}.wrap{max-width:1192px;margin:auto;padding:0 40px}.skip{position:absolute;top:-60px;background:var(--ink);color:white;padding:12px}.skip:focus{top:8px;z-index:10}.site-header{height:94px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:12px;font-size:23px;letter-spacing:-1px;font-weight:750}.mark{display:grid;grid-template-columns:repeat(2,6px);gap:3px;padding:9px;border-radius:8px;background:var(--blue)}.mark i{background:#fff;width:6px;height:6px}.site-nav{display:flex;gap:30px;font-size:14px;font-weight:550}.site-nav a[aria-current=page]{color:var(--blue)}.eyebrow{font:12px var(--mono);letter-spacing:1.8px;text-transform:uppercase;color:var(--blue);display:flex;align-items:center;gap:12px}.eyebrow:before{content:"";width:22px;height:2px;background:var(--blue)}.hero{display:grid;grid-template-columns:1.08fr 1fr;gap:64px;padding:70px 0 66px;align-items:center}h1{font-size:56px;line-height:1.09;letter-spacing:-2.8px;font-weight:650;margin:21px 0 22px}h1 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solid #e9edf3;white-space:nowrap}.demo-table th{font-size:12px;color:var(--muted);font-weight:500;background:#fafbfc}.demo-table .rownum{width:40px;text-align:center;color:#8792a2;border-right:1px solid var(--line);background:#fafbfc}.demo-table .code{background:#eef1ff;color:#344dce}.sheet-caption{display:flex;align-items:center;gap:11px;padding:16px 18px;font-size:13px;color:var(--muted)}.sheet-caption b{color:var(--blue);font-weight:500}.section-head{display:flex;justify-content:space-between;align-items:baseline;gap:20px;border-bottom:1px solid var(--line);padding-bottom:18px}.section-head h2{font-size:25px;letter-spacing:-.7px;margin:0}.section-head span,.meta{font:12px var(--mono);color:var(--muted)}.guide-row{display:grid;grid-template-columns:56px 1fr 195px 28px;gap:18px;align-items:center;padding:28px 0;border-bottom:1px solid var(--line)}.guide-row .num{color:#8b96a9;font:14px var(--mono)}.guide-row h3{font-size:20px;margin:0 0 6px;font-weight:600;letter-spacing:-.4px}.guide-row p{font-size:15px;color:var(--muted);margin:0;max-width:660px}.tag{font:12px var(--mono);color:var(--blue);background:var(--blue-soft);padding:5px 9px;border-radius:3px;justify-self:end}.arrow{font-size:22px;color:var(--blue)}.guide-row:hover h3{text-decoration:underline;text-underline-offset:5px}.note-strip{display:grid;grid-template-columns:1fr 1fr 1fr;gap:40px;background:var(--surface);padding:30px 34px;margin:48px 0 62px;border-radius:6px}.note-strip h3{font-size:15px;margin:0 0 5px}.note-strip p{color:var(--muted);font-size:14px;margin:0}.site-footer{display:flex;justify-content:space-between;gap:30px;border-top:1px solid var(--line);padding:25px 0 35px;color:var(--muted);font-size:13px}.footer-links{display:flex;gap:22px}.page-intro{padding:54px 0 32px}.page-intro h1{font-size:44px}.breadcrumb{font-size:13px;color:var(--muted);margin:30px 0}.breadcrumb span{padding:0 9px;color:#a8b0bc}.article-layout{display:grid;grid-template-columns:minmax(0,760px) 230px;gap:65px;align-items:start;padding:4px 0 70px}.article h1{font-size:45px;line-height:1.15;letter-spacing:-1.8px;margin-top:18px}.article .summary{font-size:19px;line-height:1.7;color:var(--muted)}.article h2{font-size:26px;letter-spacing:-.6px;margin:43px 0 15px;line-height:1.3;scroll-margin-top:24px}.article h3{font-size:19px;margin-top:28px}.article p,.article li{font-size:16px;line-height:1.85}.article li{padding:4px 0}.article a:not(.button){color:var(--blue);text-decoration:underline;text-underline-offset:3px}.article code{font: .88em var(--mono);padding:2px 5px;background:#f0f3f8;border-radius:3px;overflow-wrap:anywhere}.article pre{background:#172437;color:#e9edfa;padding:20px;border-radius:6px;overflow:auto;font:14px/1.8 var(--mono)}.article pre code{background:none;color:inherit;padding:0}.table-scroll{overflow:auto;margin:20px 0;border:1px solid var(--line);border-radius:6px}.content-table{width:100%;border-collapse:collapse;font-size:14px}.content-table th{background:var(--surface);font-weight:600;text-align:left}.content-table td,.content-table th{padding:11px 14px;border-bottom:1px solid var(--line);min-width:100px}.content-table tr:last-child td{border-bottom:0}.callout{border-left:3px solid var(--blue);background:#f2f4ff;padding:15px 21px;margin:26px 0;color:#344261}.callout p{margin:0;font-size:15px}.article-meta{display:flex;gap:15px;flex-wrap:wrap;font-size:13px;color:var(--muted);margin:22px 0 25px}.article-meta span+span{border-left:1px solid var(--line);padding-left:15px}.sidebar{position:sticky;top:30px;padding-top:30px}.sidebar h2{font:12px var(--mono);text-transform:uppercase;letter-spacing:1.2px;color:var(--muted);margin:0 0 16px}.toc{display:flex;flex-direction:column;gap:13px;font-size:14px;border-left:1px solid var(--line);padding-left:18px}.download-box{margin-top:32px;border:1px solid var(--line);border-radius:6px;padding:20px}.download-box p{font-size:14px;color:var(--muted)}.download-box a{display:block;font-size:14px;color:var(--blue);margin:12px 0}.download-box strong{font-size:15px}.related{border-top:1px solid var(--line);margin-top:40px;padding-top:16px}.related a{display:block;margin:10px 0}.article figure{margin:26px 0}.article figure img{border:1px solid var(--line);border-radius:6px}.article figcaption{font-size:13px;line-height:1.6;color:var(--muted)}.prose{max-width:760px;margin-bottom:65px}.file-card{padding:24px;border:1px solid var(--line);border-radius:7px;margin:20px 0}.file-card h2{margin-top:0;font-size:22px}.file-card p{color:var(--muted)}.file-links{display:flex;flex-wrap:wrap;gap:12px}.plain-list{padding-left:20px}.not-found{padding:80px 0}.mobile-toc{display:none}@media(max-width:900px){.hero{gap:30px}.hero h1{font-size:46px}.article-layout{grid-template-columns:minmax(0,1fr) 200px;gap:30px}.guide-row{grid-template-columns:35px 1fr 26px}.guide-row .tag{display:none}.wrap{padding:0 26px}}@media(max-width:680px){.wrap{padding:0 21px}.site-header{height:77px}.brand{font-size:21px}.site-nav{gap:16px;font-size:13px}.site-nav a:last-child{display:none}.hero{grid-template-columns:1fr;padding:39px 0 42px;gap:34px}h1,.hero h1{font-size:43px;letter-spacing:-1.9px}.lede{font-size:17px}.sheet-demo{transform:none}.demo-table td,.demo-table th{padding:10px;font-size:12px}.section-head h2{font-size:22px}.section-head span{font-size:11px}.guide-row{grid-template-columns:25px 1fr 18px;gap:10px;padding:23px 0}.guide-row h3{font-size:18px}.guide-row p{font-size:14px}.note-strip{grid-template-columns:1fr;gap:22px;padding:25px;margin:35px 0}.site-footer{flex-direction:column;gap:12px}.article-layout{display:block;padding-bottom:35px}.sidebar{display:none}.article h1{font-size:36px;letter-spacing:-1.3px}.article h2{font-size:24px}.article .summary{font-size:18px}.mobile-toc{display:block;border-block:1px solid var(--line);padding:15px 0;margin:24px 0}.mobile-toc summary{font-size:14px;cursor:pointer}.mobile-toc .toc{margin-top:16px}.article-meta{font-size:12px;gap:10px}.page-intro{padding:35px 0 20px}.page-intro h1{font-size:36px}.file-links{flex-direction:column}.file-links .button{justify-content:flex-start}.article figure{margin-inline:0}}@media(prefers-reduced-motion:no-preference){a{transition:color .15s,background .15s}}
/* Preserve meaningful repeated spaces in sample identifiers. */
.article code { white-space: break-spaces; }
.content-table td { white-space: pre-wrap; }
.article pre, .article pre code { white-space: pre; overflow-wrap: normal; word-break: normal; }
.article pre:focus-visible { outline: 3px solid #e4ad25; outline-offset: 3px; }
.reading-paths { padding: 22px 26px; margin: 0 0 36px; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; }
.reading-paths h2 { margin: 0 0 10px; font-size: 24px; line-height: 1.3; }
.reading-paths p { color: var(--muted); }
.reading-paths ol { padding-left: 22px; margin-bottom: 0; }
.reading-paths li { margin: 12px 0; }
.reading-paths a { color: var(--blue); text-decoration: underline; text-underline-offset: 3px; }
.content-table code { white-space: pre; overflow-wrap: normal; font-size: 14px; }

/* Readable navigation and downloads at narrow widths. */
.footer-links{flex-wrap:wrap;row-gap:10px}.site-footer>span{min-width:0}.prose a,.article a{overflow-wrap:anywhere}
.mobile-downloads{display:none}summary{cursor:pointer}.table-scroll:focus-visible{outline:3px solid #344dce;outline-offset:3px}
@media(max-width:680px){.mobile-downloads{display:block;margin:22px 0}.footer-links{gap:10px 20px}.sheet-top{flex-wrap:wrap;gap:8px}.sheet-caption{flex-wrap:wrap}.section-head{flex-wrap:wrap;gap:8px}.site-header{height:auto;min-height:77px;flex-wrap:wrap;gap:8px;padding:16px 0}.site-nav a:last-child{display:inline}.site-nav{flex-wrap:wrap}.article-meta span+span{border-left:0;padding-left:0}}
@media print{.site-header,.site-footer,.sidebar,.mobile-toc,.mobile-downloads,.related{display:none}.wrap{padding:0}.article-layout{display:block}.article{max-width:none}a{text-decoration:underline}.table-scroll,pre{overflow:visible}h2,h3{break-after:avoid}table,figure{break-inside:avoid}}
/* Small numeric labels must retain readable contrast. */
.guide-row .num,.demo-table .rownum{color:var(--muted)}