:root{color-scheme:light;--ink:#193c30;--text:#273e32;--muted:#526255;--cream:#f7f4ec;--paper:#fffefa;--pale:#e7eddf;--line:#c6d0c0;--accent:#98602e}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--cream);color:var(--text);font:17px/1.6 Arial,Helvetica,sans-serif}a{color:var(--ink);text-underline-offset:4px;text-decoration-thickness:1px}a:hover{text-decoration-thickness:2px}a:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--accent);outline-offset:6px}img{max-width:100%;height:auto}.wrap{width:min(1120px,calc(100% - 64px));margin-inline:auto}.skip-link{position:absolute;top:-100px;left:20px;padding:12px 20px;background:var(--paper);z-index:10}.skip-link:focus{top:12px}.site-header{min-height:104px;display:flex;align-items:center;justify-content:space-between;gap:24px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:13px;font-weight:700;letter-spacing:4px;font-size:18px;text-decoration:none}.brand-mark{display:grid;place-items:center;width:40px;height:40px;border:1px solid var(--ink);border-radius:50%;font:30px/1 Georgia,serif;letter-spacing:0}.header-link{font-size:14px}.header-link span{margin-left:10px;font-size:20px}.hero{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(260px,.8fr);align-items:center;gap:58px;padding-block:70px 62px}.eyebrow{margin:0 0 17px;font-size:11px;font-weight:700;letter-spacing:2px;color:var(--muted)}h1,h2{font-family:Georgia,'Times New Roman',serif;color:var(--ink);font-weight:400;letter-spacing:-1.5px}h1{font-size:clamp(42px,4.8vw,63px);line-height:1.08;margin:0 0 27px}h2{font-size:clamp(32px,3.3vw,43px);line-height:1.15;margin:0 0 19px}h3{color:var(--ink);font-size:18px;line-height:1.4;margin:0 0 11px}p{margin:0 0 18px}.lead{font-size:19px;line-height:1.65;max-width:590px;margin-bottom:27px}.button{display:inline-flex;align-items:center;gap:26px;padding:15px 23px;background:var(--ink);color:var(--paper);border-radius:4px;font-weight:700;font-size:15px;text-decoration:none}.button:hover{background:#244e3e}.button span{font-size:22px;line-height:1}.download-detail{font-size:12px;color:var(--muted);margin:12px 0 21px}.format-tags{list-style:none;padding:0;margin:0;display:flex;gap:8px;flex-wrap:wrap}.format-tags li{font-size:11px;background:var(--pale);border:1px solid var(--line);border-radius:30px;padding:5px 10px}.worksheet-preview{margin:0;padding:30px 20px 17px;background:var(--pale);border-radius:120px 120px 6px 6px}.preview-paper{width:82%;margin:0 auto;padding:10px;background:var(--paper);box-shadow:8px 12px 0 #c8d5c0,0 12px 24px #193c3015;transform:rotate(-3deg)}.preview-paper img{display:block;width:100%}.worksheet-preview figcaption{text-align:center;font-size:10px;letter-spacing:.2px;color:var(--muted);margin-top:25px}.downloads-section{padding-block:59px;background:var(--paper);border-block:1px solid var(--line)}.section-heading{max-width:770px}.section-heading>p:last-child{color:var(--muted)}.table-wrap{overflow-x:auto;margin:28px 0 33px}table{width:100%;border-collapse:collapse;min-width:700px;font-size:14px}caption{text-align:left;font-size:13px;font-weight:700;color:var(--muted);margin-bottom:12px}th,td{text-align:left;padding:17px 20px;border-bottom:1px solid var(--line);vertical-align:middle}thead{background:var(--pale)}thead th{font-size:11px;letter-spacing:1px;text-transform:uppercase}tbody th{font-size:16px;color:var(--ink)}td a{font-weight:700;font-size:13px;white-space:nowrap}td a span{margin-left:10px}.source-strip{padding-top:12px;max-width:900px}.source-strip>p{font-size:15px}.source-links{display:flex;flex-wrap:wrap;gap:9px 14px;font-size:13px!important}.source-links span{color:var(--muted)}.method-section{padding-block:65px 58px}.steps{list-style:none;counter-reset:preparation;padding:0;margin:35px 0 40px;display:grid;grid-template-columns:1fr 1fr;gap:30px 48px}.steps li{counter-increment:preparation;position:relative;padding-left:48px}.steps li::before{content:'0' counter(preparation);position:absolute;left:0;top:0;color:var(--accent);font:20px/1.4 Georgia,serif}.steps p{font-size:15px;color:var(--muted);margin:0}.scope-note{padding:26px 29px;background:var(--pale);border-left:3px solid var(--ink)}.scope-note p{font-size:14px;color:var(--muted);margin:0;max-width:850px}.site-footer{border-top:1px solid var(--line);padding-block:27px;display:flex;justify-content:space-between;gap:24px;color:var(--muted);font-size:11px}.site-footer p{margin:0}.site-footer a{font-weight:700}.error-main{min-height:60vh;padding-block:100px;max-width:760px}.error-main h1{margin-bottom:25px}.error-main p{max-width:540px}
@media(max-width:760px){body{font-size:16px}.wrap{width:min(1120px,calc(100% - 36px))}.site-header{min-height:85px}.brand{font-size:15px;letter-spacing:3px}.brand-mark{width:34px;height:34px;font-size:25px}.header-link{font-size:12px;max-width:150px;text-align:right}.hero{grid-template-columns:1fr;gap:34px;padding-block:45px}.hero-copy{max-width:600px}h1{font-size:45px}.worksheet-preview{max-width:290px;justify-self:center;width:100%;padding-top:27px}.lead{font-size:17px}.downloads-section{padding-block:40px}.method-section{padding-block:44px}.steps{grid-template-columns:1fr;gap:26px}.scope-note{padding:24px}.site-footer{display:block}.site-footer p+p{margin-top:10px}.table-wrap{margin-block:24px}.button{gap:18px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}