:root{--paper: #fbf8f2;--paper-raised: #fffdf8;--ink: #221c15;--ink-soft: #5d5445;--ink-faint: #8b8171;--rule: #e3dccd;--rule-strong: #b9ae9a;--accent: #8f2a1c;--accent-wash: rgba(143, 42, 28, .07);--wash: rgba(34, 28, 21, .045);--font-serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, Georgia, "Times New Roman", serif;--font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;--font-mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;--text-xs: .78rem;--text-sm: .9rem;--text-base: 1.0625rem;--text-md: 1.22rem;--text-lg: 1.45rem;--text-xl: 1.85rem;--text-2xl: 2.4rem;--text-hero: clamp(2.7rem, 6vw, 4.1rem);--measure: 41rem;--sheet: 60rem;--gutter: 1.5rem}*{box-sizing:border-box}html{font-size:100%}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-serif);font-size:var(--text-base);line-height:1.72;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}img,svg{max-width:100%;height:auto}a{color:var(--accent);text-decoration:underline;text-decoration-color:color-mix(in srgb,var(--accent) 30%,transparent);text-underline-offset:.18em;transition:text-decoration-color .15s}a:hover{text-decoration-color:var(--accent)}h1,h2,h3,h4{font-weight:600;line-height:1.2;letter-spacing:-.012em;margin:2.1em 0 .55em;text-wrap:balance}h1{font-size:var(--text-hero);margin:.3em 0 .5em}h2{font-size:var(--text-xl)}h3{font-size:var(--text-md)}h4{font-size:var(--text-base)}p{margin:0 0 1.05em}ul,ol{margin:0 0 1.05em;padding-left:1.4em}li{margin-bottom:.35em}hr{border:0;border-top:1px solid var(--rule);margin:3rem 0}strong{font-weight:700}em{font-style:italic}code{font-family:var(--font-mono);font-size:.88em;background:var(--wash);padding:.1em .35em;border-radius:3px}blockquote{margin:1.8rem 0;padding:.1rem 0 .1rem 1.3rem;border-left:3px solid var(--rule-strong);color:var(--ink-soft);font-size:var(--text-md)}blockquote p{margin-bottom:.6em}.sheet{max-width:var(--sheet);margin:0 auto;padding:0 var(--gutter)}.prose{max-width:var(--measure)}.masthead{border-bottom:1px solid var(--rule)}.masthead-inner{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;flex-wrap:wrap;padding:1.1rem 0 .95rem}.wordmark{font-family:var(--font-serif);font-weight:700;font-size:1.25rem;color:var(--ink);text-decoration:none;letter-spacing:-.01em}.wordmark:hover{text-decoration:none}.wordmark .tld{color:var(--ink-faint);font-weight:400}.masthead-tag{color:var(--ink-faint);font-family:var(--font-sans);font-size:var(--text-xs);margin-left:.6rem}.nav{font-family:var(--font-sans);font-size:var(--text-sm);display:flex;gap:1.1rem;flex-wrap:wrap}.nav a{color:var(--ink-soft);text-decoration:none}.nav a:hover{color:var(--accent);text-decoration:underline;text-underline-offset:.22em}.site-footer{border-top:1px solid var(--rule);margin-top:5rem;padding:1.6rem 0 2.6rem;font-family:var(--font-sans);font-size:var(--text-sm);color:var(--ink-soft)}.site-footer .cols{display:flex;gap:3rem;flex-wrap:wrap;justify-content:space-between}.site-footer a{color:var(--ink-soft)}.eyebrow{font-family:var(--font-sans);font-size:var(--text-xs);letter-spacing:.16em;text-transform:uppercase;color:var(--accent);margin:0 0 .9rem}.dateline{font-family:var(--font-sans);font-size:var(--text-xs);color:var(--ink-faint);letter-spacing:.02em;margin:0 0 2.4rem}.dateline a{color:var(--ink-faint)}.lede{font-size:var(--text-lg);line-height:1.55;color:var(--ink);max-width:46rem}.definition-block{border:1px solid var(--rule);border-left:3px solid var(--accent);background:var(--paper-raised);padding:1.5rem 1.7rem;margin:2.2rem 0;font-size:var(--text-md);line-height:1.6}.pull{border-left:3px solid var(--accent);padding:.15rem 0 .15rem 1.3rem;font-size:var(--text-lg);font-style:italic;margin:2.6rem 0;max-width:38rem}main.article{counter-reset:fig}figure{margin:2.6rem 0}figure svg{display:block}figcaption{font-family:var(--font-sans);font-size:var(--text-sm);color:var(--ink-soft);line-height:1.55;margin-top:.75rem;max-width:48rem}figcaption:before{counter-increment:fig;content:"Fig. " counter(fig) ".  ";color:var(--ink-faint);font-variant-caps:all-small-caps;letter-spacing:.06em}figcaption .src{display:block;color:var(--ink-faint);font-size:var(--text-xs);margin-top:.3rem}.sidenote{font-family:var(--font-sans);font-size:var(--text-sm);line-height:1.55;color:var(--ink-soft);background:var(--wash);border-left:2px solid var(--rule-strong);padding:.55rem .8rem;margin:1.2rem 0;border-radius:0 3px 3px 0}@media(min-width:1180px){.sidenote{float:right;clear:right;width:14.5rem;margin:.2rem -16.5rem .8rem 1.2rem;background:transparent;border-left-width:2px}}.tbl-wrap{overflow-x:auto;margin:2.2rem 0}table{width:100%;border-collapse:collapse;font-family:var(--font-sans);font-size:var(--text-sm)}th{text-align:left;font-weight:600;padding:.55rem .9rem .55rem 0;border-bottom:2px solid var(--rule-strong)}td{border-bottom:1px solid var(--rule);padding:.6rem .9rem .6rem 0;vertical-align:top;line-height:1.5}tbody tr:last-child td{border-bottom:none}.glossary dt{font-family:var(--font-sans);font-weight:600;font-size:var(--text-md);margin-top:2.1rem;letter-spacing:-.01em}.glossary dd{margin:.35rem 0 0;color:var(--ink);max-width:var(--measure)}.policy h2{margin-top:2.6rem}.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:var(--paper);padding:.5rem 1rem}.skip:focus{left:0}.readlist{list-style:none;padding:0}.readlist li{border-top:1px solid var(--rule);padding:1.05rem 0;margin:0;display:flex;justify-content:space-between;gap:1.5rem;align-items:baseline;flex-wrap:wrap}.readlist a{font-weight:600}.readlist .note{color:var(--ink-faint);font-family:var(--font-sans);font-size:var(--text-sm)}.changelog{font-family:var(--font-sans);font-size:var(--text-sm)}.changelog dt{font-weight:600;color:var(--ink);margin-top:1.1rem}.changelog dd{margin:.15rem 0 0;color:var(--ink-soft)}