:root{color-scheme:light;--ink:#172f3d;--green:#245b49;--line:#c7d6d5}*{box-sizing:border-box}body{margin:0;background:#f4f5f0;color:var(--ink);font:17px/1.65 system-ui,sans-serif}a{color:var(--green)}header{max-width:1120px;margin:auto;padding:22px 28px;display:flex;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line)}.brand{font-weight:750;text-decoration:none}nav{display:flex;gap:22px}main{max-width:900px;margin:38px auto;padding:0 28px}h1{font-size:clamp(38px,7vw,64px);line-height:1.08;letter-spacing:-.04em;margin:8px 0 20px}h2{line-height:1.2;font-size:28px}.eyebrow,.method-name{font-size:13px;letter-spacing:.1em;font-weight:750}.lede{max-width:640px;font-size:20px}.controls{display:flex;gap:16px;flex-wrap:wrap;margin:30px 0;align-items:flex-end}label{font-weight:650;flex:1;min-width:200px}select,button{font:inherit;border:1px solid #718d88;border-radius:8px;padding:10px 12px;background:white;color:var(--ink)}select{display:block;width:100%;margin-top:6px}button{background:var(--green);color:white;cursor:pointer}article{border:1px solid var(--line);border-radius:16px;padding:24px 30px;background:white;box-shadow:0 8px 30px #172f3d08}.example{background:#eef3f2;border-radius:8px;padding:15px 18px}ol{padding-left:28px}li{padding:8px 0 8px 10px}li::marker{color:var(--green);font-weight:750}.checkpoint{border-left:4px solid var(--green);padding:14px 20px;background:#edf6ef}.checkpoint p{margin:5px 0}.notes{margin-top:35px}.small,footer{font-size:14px}footer{padding:25px;text-align:center;border-top:1px solid var(--line)}.skip{position:absolute;top:-60px;padding:10px;background:white}.skip:focus{top:0}:focus-visible{outline:3px solid #df9b27;outline-offset:4px}@media(max-width:600px){header{padding:15px}main{margin-top:25px;padding:0 16px}article{padding:15px 20px}nav{gap:12px}.controls button{width:100%}}@media print{body{background:white;font:11pt/1.5 sans-serif}header,nav,.controls,.skip,footer,details,.small{display:none}main{max-width:none;margin:0;padding:0}h1{font-size:24pt}article{box-shadow:none;border:0;padding:0}li,.checkpoint{break-inside:avoid}.notes{margin-top:20px}.notes h2{font-size:14pt}.method-name{display:block}a{color:black;text-decoration:none}}