:root{--paper:#f6f4ec;--ink:#203e34;--muted:#626d61;--line:#d7dbce;--gold:#dfd19b}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,Helvetica,sans-serif;line-height:1.7}a{color:inherit}header,main,footer{max-width:1320px;margin:auto}header{display:flex;align-items:center;justify-content:space-between;padding:30px 5%;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-size:11px;line-height:1.4;letter-spacing:1px}.mark{display:grid;place-items:center;width:39px;height:44px;border:1px solid var(--ink);font:30px Georgia}nav{display:flex;gap:30px;font-size:13px}nav a{text-decoration:none}.edition,.eyebrow,.label,.board-tag,.board-footer{font-size:10px;font-weight:bold;letter-spacing:1.5px}.edition{color:var(--muted)}.hero{padding:76px 5% 70px;display:grid;grid-template-columns:1.1fr 1fr;gap:70px;align-items:center}.eyebrow{margin:0 0 22px}h1,h2,h3,h4,p{margin-top:0}h1{font:normal clamp(48px,5.5vw,78px)/1.05 Georgia,serif;letter-spacing:-3px;margin-bottom:25px}h1 em{font-weight:normal}.intro{max-width:490px;color:var(--muted);font-size:16px}.button{display:inline-flex;gap:40px;align-items:center;background:var(--ink);color:white;padding:13px 20px;font-size:13px;text-decoration:none;margin-top:12px}.small{font-size:10px;margin:17px 0 0;color:var(--muted)}.board{background:#244c3e;color:#edf1e4;padding:25px 26px 18px;transform:rotate(-2deg);box-shadow:12px 14px 0 #e6e8db}.board svg{width:100%;display:block;margin:20px 0}.board-tag{color:#b7cbbb}.board-footer{display:flex;justify-content:space-between;border-top:1px solid #698477;padding-top:16px;font-size:8px}.subjects{padding:45px 5% 65px;border-top:1px solid var(--line)}.section-top{display:flex;justify-content:space-between;gap:25px;align-items:end}.section-top .eyebrow{margin-bottom:10px}h2{font:normal 34px/1.2 Georgia,serif;letter-spacing:-.6px}.section-top>p{font-size:12px;color:var(--muted)}.subject-links{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:28px}.subject-links a{text-decoration:none;padding:22px 16px;display:flex;align-items:center;gap:15px;font:22px Georgia;border-right:1px solid var(--line)}.subject-links a:first-child{padding-left:0}.subject-links a:last-child{border:0}.subject-links span{font:10px Arial;color:var(--muted)}.subject-links b{margin-left:auto;font-weight:normal}.subject-links a:hover{background:#eceee3}.notes{padding:0 5%}.notes article{display:grid;grid-template-columns:1fr 1.7fr;gap:70px;border-top:1px solid var(--line);padding:60px 0}.note-heading h2{font-size:46px;margin-bottom:15px}.note-heading>p:last-child{color:var(--muted);font-size:14px;max-width:230px}.note-body{max-width:650px}.note-body h3{font:25px Georgia;margin-bottom:13px}.note-body p,.note-body li{font-size:14px}.example{padding:25px 28px;background:#e9ede2;border-left:3px solid #8d9d79;margin:25px 0}.label{font-size:9px;color:var(--muted)}h4{font:22px Georgia;margin:12px 0}.example p,.example ol{margin-bottom:0}.example ol{padding-left:18px}.try{margin-bottom:5px}details{font-size:13px}summary{cursor:pointer;text-decoration:underline;text-underline-offset:4px}details p{padding:10px 0}.study{background:#e7e9dc;padding:55px 5%;margin-top:10px}.study h2{font-size:43px}.study>div{display:grid;grid-template-columns:repeat(3,1fr);gap:35px;font-size:13px}.study p:last-child{margin-bottom:0}.about{display:grid;grid-template-columns:1fr 1.7fr;gap:70px;padding:60px 5%;font-size:13px;color:var(--muted)}.about h2{color:var(--ink)}footer{border-top:1px solid var(--line);padding:28px 5%;display:flex;justify-content:space-between;gap:20px;font-size:10px;color:var(--muted)}footer .brand{font-size:10px}.skip{position:absolute;left:12px;top:-60px;padding:10px;background:white}.skip:focus{top:10px}a:focus-visible,summary:focus-visible{outline:3px solid #b28725;outline-offset:5px}@media(max-width:760px){header{padding:22px 6%}nav{gap:16px;font-size:12px}.edition{display:none}.hero{padding:45px 6%;grid-template-columns:1fr;gap:40px}h1{letter-spacing:-2px}.board{max-width:470px;width:100%;justify-self:center}.section-top{display:block}.subjects,.notes{padding-left:6%;padding-right:6%}.subject-links{grid-template-columns:1fr 1fr}.subject-links a{font-size:19px;border-bottom:1px solid var(--line)}.subject-links a:nth-child(2){border-right:0}.subject-links a:nth-child(3){padding-left:0;border-bottom:0}.subject-links a:last-child{border-bottom:0}.notes article{grid-template-columns:1fr;gap:15px;padding:40px 0}.note-heading .eyebrow{margin-bottom:8px}.note-heading h2{font-size:38px}.note-heading>p:last-child{max-width:none}.study{padding:40px 6%}.study>div{grid-template-columns:1fr;gap:15px}.about{padding:40px 6%;grid-template-columns:1fr;gap:10px}footer{flex-wrap:wrap;padding:25px 6%}footer>span{display:none}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}