@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500&display=swap');
:root{--ink:#17212b;--muted:#586675;--paper:#f3f5f7;--white:#fff;--line:#d9e0e6;--accent:#a74712;--nav:#111d2b;--blue:#204db0}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.7 'DM Sans',Arial,sans-serif}a{color:var(--blue);text-underline-offset:3px}a:hover{text-decoration-thickness:2px}a:focus-visible,summary:focus-visible{outline:3px solid #df7c31;outline-offset:5px}.skip{position:absolute;top:-100px;left:20px;background:white;padding:12px;z-index:30}.skip:focus{top:10px}.sidebar{position:fixed;inset:0 auto 0 0;width:250px;background:var(--nav);color:#e4eaf2;padding:36px 25px;display:flex;flex-direction:column}.brand{color:white;text-decoration:none;line-height:1.1}.brand b{font:500 34px 'IBM Plex Mono',monospace;letter-spacing:-2px;display:block}.brand span{display:block;font-size:14px;color:#acb8ca;letter-spacing:2px;text-transform:uppercase;margin-top:10px}.nav{margin-top:46px;display:grid;gap:7px}.nav a{color:#bcc9da;text-decoration:none;padding:11px 12px;border-left:2px solid transparent;font-size:15px}.nav a:hover{background:#1b2c40;color:white}.nav a.active{background:#223248;border-color:#f2a24f;color:white}.sidenote{margin-top:auto;color:#a8b7c9;font-size:14px;border-top:1px solid #344252;padding-top:20px}.sidenote strong{color:#f4b878;font-weight:500}.workspace{margin-left:250px}.topbar{border-bottom:1px solid var(--line);padding:17px 42px;display:flex;justify-content:space-between;gap:20px;font-size:14px;color:var(--muted);background:var(--white)}main{max-width:1190px;margin:auto;padding:42px 48px 70px}.eyebrow{font:500 13px 'IBM Plex Mono',monospace;text-transform:uppercase;letter-spacing:1.5px;color:var(--muted)}h1,h2,h3{line-height:1.23;letter-spacing:-.035em}h1{font-size:clamp(30px,3.7vw,49px);margin:14px 0 22px;font-weight:600}h2{font-size:26px;margin:34px 0 15px}h3{font-size:20px;margin:27px 0 12px}p{margin:0 0 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var(--line);background:white}table{border-collapse:collapse;width:100%;font-size:15px}th,td{text-align:left;vertical-align:top;border-bottom:1px solid var(--line);padding:13px 15px}th{font-weight:600;background:#eaf0f5}tr:last-child td{border-bottom:0}pre{overflow:auto;background:#172331;color:#dbe6f4;padding:20px;font-size:14px;line-height:1.6}code{font-family:'IBM Plex Mono',monospace;font-size:.88em;overflow-wrap:anywhere}p code,li code{background:#e5ebf1;padding:2px 4px}blockquote{border-left:3px solid #cf8f53;padding:8px 22px;margin:25px 0;background:#fff}.article a{overflow-wrap:anywhere}.notice{padding:14px 18px;border:1px solid #e0c5a7;background:#fff8ee;color:#724316;margin:24px 0;font-size:15px}.files details{background:white;border:1px solid var(--line);margin:14px 0}.files summary{padding:18px 22px;cursor:pointer;font-weight:600}.file-row{display:flex;justify-content:space-between;gap:18px;padding:11px 22px;border-top:1px solid var(--line);font-size:14px}.file-row a{overflow-wrap:anywhere}.file-row span{white-space:nowrap;color:var(--muted)}.article-footer{margin-top:42px;border-top:1px solid var(--line);padding-top:22px;display:flex;justify-content:space-between;gap:18px;font-size:14px}.footer{font-size:13px;color:var(--muted);margin-top:45px;padding-top:22px;border-top:1px solid var(--line)}.textlink{display:inline-block;margin-right:20px}.session-tools{font-size:14px;margin:15px 0 28px;display:flex;gap:20px;flex-wrap:wrap}@media(max-width:950px){.sidebar{width:215px;padding:28px 20px}.workspace{margin-left:215px}main{padding:30px 28px}.topbar{padding:16px 28px}.grid{gap:15px}.card{padding:20px}}@media(max-width:700px){.sidebar{position:static;width:auto;padding:20px 22px}.brand b{font-size:27px;letter-spacing:-1px}.brand span{font-size:12px;margin-top:7px}.nav{margin-top:22px;display:flex;overflow-x:auto;gap:8px;padding-bottom:4px}.nav a{font-size:14px;white-space:nowrap;padding:8px 10px;border-left:0;border-bottom:2px solid transparent}.nav a.active{border-bottom-color:#f2a24f}.sidenote{display:none}.workspace{margin:0}.topbar{padding:13px 22px;font-size:12px}main{padding:26px 22px 45px}h1{font-size:34px}.lede{font-size:17px}.metrics{margin:24px 0}.metric{padding:15px 12px}.metric strong{font-size:25px}.metric span{font-size:12px}.focus{padding:23px}.grid{grid-template-columns:1fr}.session-row{grid-template-columns:35px 1fr;gap:12px}.session-row .badge{grid-column:2;justify-self:start}.section-title h2{font-size:23px}.file-row{padding:12px 16px}.article-footer{flex-wrap:wrap}}@media print{.sidebar,.topbar,.session-tools,.article-footer,.footer{display:none}.workspace{margin:0}main{padding:0;max-width:none}body{background:white;color:black}a{color:black}.table-wrap,pre{overflow:visible}h1{font-size:30px}}

.page-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:25px 0}.page-grid figure{margin:0}.page-grid img{width:100%;height:auto}.page-grid figcaption{font-size:14px;color:var(--muted)}@media(max-width:700px){.page-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
.image-controls{display:flex;flex-wrap:wrap;gap:16px;align-items:end;padding:20px;background:white;border:1px solid var(--line);margin:24px 0}.image-controls label{display:flex;flex-direction:column;gap:5px;font-size:15px}.image-controls select,.image-controls button{font:inherit;padding:10px;border:1px solid #8493a5;border-radius:3px;background:white;color:var(--ink);max-width:100%}.image-controls .check{flex-direction:row;align-items:center;min-height:44px}.image-controls input{width:20px;height:20px;accent-color:var(--blue)}.image-controls button{cursor:pointer}.image-controls :focus-visible{outline:3px solid #df7c31;outline-offset:3px}.image-compare{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin:20px 0}.image-compare figure{margin:0;min-width:0}.image-compare figcaption{font-weight:600;margin-bottom:10px}.image-compare canvas{display:block;width:100%;height:auto;image-rendering:auto;border:1px solid var(--line);background:white}.image-note{font-size:14px;color:var(--muted)}@media(max-width:700px){.image-controls{padding:14px}.image-controls label{max-width:100%;width:100%}.image-compare{gap:10px}.image-compare figcaption{font-size:14px}}

/* Research guide and progressively enhanced archive search. */
.guide-entry{background:#edf3f5;border-left:4px solid #527d87}.notebook-search{margin:25px 0;padding:20px;background:#fff;border:1px solid var(--line);border-radius:5px}.notebook-search label{display:block;font-weight:650;margin-bottom:10px}.search-line{display:flex;gap:10px}.search-line input{min-width:0;flex:1;font:inherit;padding:12px;border:1px solid #7c8996;border-radius:4px;background:#fff;color:var(--ink)}.search-line button{font:inherit;padding:10px 18px;background:#172737;color:#fff;border:1px solid #172737;border-radius:4px;cursor:pointer}.search-line button:disabled{opacity:.5;cursor:default}.search-line :focus-visible{outline:3px solid #df7c31;outline-offset:3px}.notebook-search p{font-size:14px;color:var(--muted);margin:10px 0 0}[hidden]{display:none!important}.article h2{scroll-margin-top:25px}@media(max-width:700px){.notebook-search{padding:15px}.search-line{flex-wrap:wrap}.search-line input{width:100%;flex-basis:100%}.article table{font-size:14px}}