:root{color-scheme:light;--ink:#173a31;--paper:#fcfcf7;--rule:#d7ded5;--muted:#51665c}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.75 system-ui,-apple-system,Segoe UI,sans-serif}header,footer{padding:1.2rem max(1.3rem,calc((100vw - 1140px)/2));border-bottom:1px solid var(--rule);display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap}header>a{font-weight:800;text-decoration:none}nav{display:flex;gap:1.3rem;flex-wrap:wrap;font-size:.85rem}main{max-width:1140px;margin:0 auto;padding:3rem 1.3rem 5rem}a{color:inherit;text-underline-offset:4px;overflow-wrap:anywhere}a:hover{color:#547229}a:focus-visible{outline:3px solid #547229;outline-offset:4px}h1,h2,h3{line-height:1.25;letter-spacing:-.025em}h1{font-family:Georgia,serif;font-size:clamp(2.2rem,5vw,3.5rem);font-weight:500;margin:.2rem 0 1rem}h2{font-size:1.55rem;margin-top:2.2rem}h3{font-size:1.2rem}p{max-width:90ch}.eyebrow{font-size:.75rem;letter-spacing:.12em;font-weight:700;color:var(--muted)}.lead{font-size:1.25rem;color:var(--muted);line-height:1.6}.subjects{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1.1rem;margin:2rem 0}.subject{padding:1.8rem;border:1px solid var(--rule);border-radius:14px;background:#fff;text-decoration:none}.subject>span{font-weight:800;font-size:.75rem;letter-spacing:.12em}.subject h2{margin:.65rem 0}.subject p{font-size:.9rem;color:var(--muted)}.subject strong{font-size:.85rem}.exports{background:#eaf0e5;padding:1.3rem 1.7rem;border-radius:14px;margin:2rem 0}.exports h2{margin:.2rem 0}.links{display:flex;gap:.7rem;flex-wrap:wrap}.links a{display:inline-block;border:1px solid #b5c5ad;background:#fff;border-radius:8px;padding:.5rem .8rem;font-size:.85rem;text-decoration:none}.contents{padding-left:1.3rem}.contents li{padding:.5rem 0;border-bottom:1px solid var(--rule)}small{display:block;color:var(--muted);font-size:.8rem}.note{font-size:.88rem;color:var(--muted)}section{margin:1.4rem 0}img,svg{max-width:100%;height:auto}img.math,img.equation{vertical-align:middle;max-height:14rem}figure{margin:1.5rem 0;padding:1rem;background:#f1f4eb;border-radius:10px}figcaption{font-size:.9rem;color:var(--muted)}pre{white-space:pre-wrap;overflow-wrap:anywhere;padding:1rem;background:#eef2e9;border:1px solid var(--rule);border-radius:8px;font-size:.9rem}code{overflow-wrap:anywhere;font-size:.9em}table{border-collapse:collapse;max-width:100%;display:block;overflow-x:auto;margin:1.2rem 0}td,th{border:1px solid var(--rule);padding:.65rem;text-align:left}th{background:#eaf0e5}summary{cursor:pointer}footer{font-size:.8rem;border-top:1px solid var(--rule);border-bottom:none}.formula-source,.equation-source{display:block;font-size:.85rem;padding:.5rem .8rem;background:#eef2e9;overflow-wrap:anywhere}.flow{display:flex;flex-wrap:wrap;gap:.5rem;align-items:center}.node{border:1px solid var(--rule);padding:.75rem;border-radius:8px}.pill{font-size:.8rem}.step,.answer,.question{margin:1rem 0}@media(max-width:650px){.subjects{grid-template-columns:1fr}main{padding-top:2rem}header{align-items:flex-start}nav{gap:.7rem}.subject{padding:1.3rem}.exports{padding:1rem}body{font-size:16px}}@media print{header,footer,.links{display:none}main{padding:0;max-width:none}a{text-decoration:none}pre,figure{break-inside:avoid}}

.math-source,.diagram-description{display:block;font-size:.85rem;padding:.6rem .8rem;margin:.5rem 0 1rem;background:#eef2e9;overflow-wrap:anywhere}.math-source code{white-space:pre-wrap}article{min-width:0}article h1,article h2,article h3{overflow-wrap:anywhere}
