:root{--paper:#f5f3ed;--panel:#fffef9;--ink:#202c29;--muted:#5b6b64;--rule:#cbd3c8;--green:#1d6555;--soft:#e4eee6;--ochre:#915719;--rose:#9a4052;--violet:#615185;--serif:Georgia,'Times New Roman',serif;--sans:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.75 var(--sans)}a{color:var(--green);text-underline-offset:4px}button,input,select,textarea{font:inherit;color:inherit}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--ochre);outline-offset:4px}button,.button{border:1px solid var(--rule);background:var(--panel);padding:8px 14px;border-radius:4px;cursor:pointer;text-decoration:none;font-size:.85rem}button:hover,.button:hover{background:var(--soft)}.skip{position:absolute;top:-90px;left:20px;background:white;padding:12px;z-index:10}.skip:focus{top:10px}.layout{display:grid;grid-template-columns:250px minmax(0,1fr)}.rail{position:sticky;top:0;height:100vh;overflow:auto;border-right:1px solid var(--rule);padding:36px 24px;background:#ecefe7}.brand{display:block;font:700 1.4rem/1.2 var(--serif);color:var(--ink);text-decoration:none}.rail .edition{font-size:.66rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:12px 0 24px}.rail nav a{display:block;padding:5px 0;font-size:.79rem;line-height:1.45;text-decoration:none;color:var(--muted)}.rail nav a:hover,.rail nav a[aria-current=page]{color:var(--green);font-weight:650}.rail .group{font-size:.65rem;text-transform:uppercase;letter-spacing:.12em;margin:24px 0 7px;font-weight:700}.rail hr{border:0;border-top:1px solid var(--rule);margin:25px 0}.tools{display:flex;gap:8px;flex-wrap:wrap;margin-top:24px}main{min-width:0}.hero{border-bottom:1px solid var(--rule);padding:70px max(32px,calc((100% - 900px)/2));background:var(--panel)}.eyebrow{color:var(--ochre);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;margin-bottom:20px;font-weight:600}h1,h2,h3{font-family:var(--serif);font-weight:600;line-height:1.19;letter-spacing:-.02em;text-wrap:balance}h1{font-size:clamp(2.5rem,4.7vw,4.6rem);max-width:19ch;margin:0 0 23px}h2{font-size:2rem;margin:58px 0 22px;padding-top:16px;border-top:1px solid var(--rule)}h3{font-size:1.32rem;margin:34px 0 14px}.lead{font-size:1.13rem;line-height:1.65;color:var(--muted);max-width:68ch}.meta{display:flex;gap:12px 28px;flex-wrap:wrap;color:var(--muted);font-size:.75rem;margin-top:28px}.reading{max-width:850px;margin:auto;padding:12px 40px 85px}.reading.wide{max-width:1060px}.central{border-left:4px solid var(--green);padding:18px 22px;background:var(--soft);margin:32px 0;font:1.18rem/1.55 var(--serif)}p{margin:0 0 1.2em}li{margin-bottom:.55em}ul,ol{padding-left:1.3em}strong{font-weight:650}blockquote{border-left:3px solid var(--ochre);margin:25px 0;padding:16px 22px;background:#f0eadb}blockquote p:last-child{margin-bottom:0}.equation{overflow-x:auto;overflow-y:hidden;margin:24px 0;padding:10px 0}.math{max-width:100%}mjx-container[jax=SVG][display=true]{overflow-x:auto;overflow-y:hidden;max-width:100%;padding:8px 0}figure{margin:35px 0}figure img{width:100%;height:auto;border:1px solid var(--rule);border-radius:3px;background:#fffef9}figcaption{font-size:.84rem;line-height:1.6;color:var(--muted);margin-top:10px}.status{border:1px solid var(--rule);background:var(--panel);padding:22px 25px;margin:28px 0}.status p:last-child{margin-bottom:0}.label{display:block;font-size:.66rem;letter-spacing:.11em;font-weight:700;text-transform:uppercase;color:var(--green);margin-bottom:8px}.note{font-size:.87rem;color:var(--muted)}.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin:28px 0}.topic{background:var(--panel);border:1px solid var(--rule);padding:23px;display:flex;flex-direction:column}.topic .number{font-size:.7rem;letter-spacing:.1em;color:var(--ochre)}.topic h3{margin:10px 0;font-size:1.52rem}.topic h3 a{text-decoration:none;color:var(--ink)}.topic p{font-size:.9rem;color:var(--muted)}.topic .entry{margin-top:auto;border-top:1px solid var(--rule);padding-top:13px;font-size:.82rem}.topic .entry a{display:block;margin-top:4px}.filter{display:flex;flex-wrap:wrap;gap:12px;padding:18px;background:var(--soft);margin:24px 0}.filter label{font-size:.78rem;display:flex;flex-direction:column;flex:1;min-width:150px}.filter input,.filter select{padding:9px;background:var(--panel);border:1px solid var(--rule);border-radius:3px;width:100%}.filter input{min-width:200px}.qcard{background:var(--panel);border:1px solid var(--rule);border-left:4px solid var(--green);padding:22px 25px;margin:24px 0;scroll-margin-top:20px}.qcard[data-kind=Extension]{border-left-color:var(--rose)}.qcard[data-kind=Diagnostic]{border-left-color:var(--ochre)}.qtop{display:flex;gap:12px;align-items:center;flex-wrap:wrap;color:var(--muted);font-size:.72rem}.qtop .badge{margin-left:auto;border:1px solid var(--rule);padding:1px 8px;border-radius:20px}.qcard h3{margin:12px 0 18px}.qcard p{font-size:.91rem}.qcard p:last-of-type{margin-bottom:.7em}.qcard .qfoot{font-size:.78rem;display:flex;gap:18px;border-top:1px solid var(--rule);padding-top:12px;margin-top:16px}.qcard details{margin-top:15px}.qcard summary{cursor:pointer;font-size:.85rem;color:var(--green)}.notebook{padding:15px 0 0}.notebook label{display:block;font-size:.8rem;margin:10px 0}.notebook textarea,.notebook select{width:100%;padding:9px;border:1px solid var(--rule);background:var(--paper);border-radius:3px}.notebook textarea{min-height:125px;resize:vertical}.notebook .save-status{font-size:.75rem;min-height:1.5em;color:var(--muted)}.bibliography{font-size:.87rem;padding:0;list-style:none}.bibliography li{border-top:1px solid var(--rule);padding:15px 0}.bibliography .why{display:block;color:var(--muted);margin-top:5px}.route{border-left:3px solid var(--green);padding:0 0 0 22px;margin:28px 0}.route h3{margin-top:0}.foot{border-top:1px solid var(--rule);font-size:.78rem;color:var(--muted);padding:25px 40px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.table-wrap{overflow-x:auto}table{width:100%;border-collapse:collapse;font-size:.86rem}td,th{border-bottom:1px solid var(--rule);padding:11px 13px;text-align:left;vertical-align:top}th{background:var(--soft)}.notice{padding:13px 18px;border:1px solid var(--rule);font-size:.85rem;background:var(--panel)}[hidden]{display:none!important}.glossary dt{font:600 1.1rem var(--serif);margin-top:25px}.glossary dd{margin:8px 0 0}.count{font-size:.8rem;color:var(--muted)}.toc{columns:2;font-size:.85rem;padding-left:1.1em}.toc a{text-decoration:none}.no-results{padding:20px;border:1px solid var(--rule)}
@media(max-width:1100px){.layout{grid-template-columns:220px minmax(0,1fr)}.rail{padding:28px 18px}.hero{padding:50px 35px}.reading{padding-left:30px;padding-right:30px}.cards{gap:12px}.topic{padding:18px}}
@media(max-width:800px){.layout{display:block}.rail{position:static;height:auto;border-right:0;border-bottom:1px solid var(--rule);padding:20px}.rail nav{display:none}.rail.menu-open nav{display:block;columns:2}.rail .edition{margin:8px 0}.rail hr{display:none}.tools{margin-top:12px}.hero{padding:38px 22px}.reading{padding:5px 22px 50px}h1{font-size:2.8rem}h2{font-size:1.65rem}.cards{grid-template-columns:1fr}.toc{columns:1}.qcard{padding:18px}.meta{gap:8px 15px}.foot{padding:22px}.menu-button{display:inline-block!important}}
.menu-button{display:none}
.equation-hint{font-size:.7rem;color:var(--muted);margin:0;text-align:right;font-family:var(--sans)}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{body{font-size:10.5pt;background:white;color:black}.layout{display:block}.rail,.tools,.filter,.qfoot,.notebook,details,.skip,.no-print{display:none!important}.hero{padding:0 0 20px;background:white}.reading{max-width:none;padding:0}.cards{display:block}.topic,.qcard,.status,blockquote{background:white;break-inside:avoid}.topic{margin:14px 0}h1{font-size:32pt;max-width:none}h2{break-after:avoid;font-size:20pt}figure{break-inside:avoid}a{color:inherit}p{orphans:3;widows:3}.foot{margin-top:25px;padding:15px 0}.equation{overflow:visible}}

.foot .ai-statement{flex-basis:100%;margin:0}