:root{--paper:#f6f5ef;--white:#fff;--ink:#263b34;--muted:#616c64;--green:#234d43;--line:#dbdfd5;--accent:#aa5839;--soft:#e7ebdf;color-scheme:light}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:108px}
body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-underline-offset:5px}
a:focus-visible{outline:3px solid var(--accent);outline-offset:6px;border-radius:3px}
svg{display:block}
.wrap{width:min(1120px,calc(100% - 80px));margin-inline:auto}
.skip-link{position:fixed;left:20px;top:-90px;background:var(--white);padding:16px;z-index:20}
.skip-link:focus{top:16px}
.site-header{position:sticky;top:0;z-index:10;background:var(--paper);border-bottom:1px solid var(--line)}
.header-inner{min-height:90px;display:flex;align-items:center;justify-content:space-between;gap:30px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-size:19px;font-weight:650;letter-spacing:-.45px;line-height:1.4}
.brand svg{width:38px;height:40px;color:var(--green)}
.brand-domain{display:block;font-size:11px;letter-spacing:.75px;font-weight:400;color:var(--muted)}
.top-nav{display:flex;gap:30px;align-items:center;font-size:14px;font-weight:550}
.top-nav a{text-decoration:none;padding:12px 0}
.top-nav a:hover{color:var(--accent)}
.hero{display:grid;grid-template-columns:1.28fr 1fr;gap:76px;align-items:center;padding-block:66px 72px}
.eyebrow{font-size:10px;font-weight:650;letter-spacing:1.65px;line-height:1.6;display:flex;align-items:center;gap:9px;margin:0 0 24px;color:var(--green)}
.eyebrow>span{display:inline-block;width:6px;height:6px;background:var(--accent);border-radius:50%}
h1{font-size:clamp(38px,4.25vw,56px);letter-spacing:-2.5px;font-weight:550;line-height:1.12;margin:0 0 23px;color:var(--green)}
.hero-description{font-size:20px;line-height:1.65;color:var(--muted);margin:0 0 26px;letter-spacing:-.25px}
.read-link{display:inline-flex;gap:38px;align-items:center;border-bottom:1px solid var(--green);padding:7px 0 12px;text-decoration:none;font-weight:600;font-size:15px}
.read-link span{font-size:23px;line-height:1}
.read-link:hover{color:var(--accent);border-color:var(--accent)}
.hero-footnote{display:flex;gap:13px;align-items:center;margin-top:43px;color:var(--muted);font-size:9px;letter-spacing:1.2px}
.hero-footnote i{width:30px;border-top:1px solid #acb6ab}
.hero-photo{margin:0;overflow:hidden;border-radius:4px 38px 4px 4px}
.hero-photo img{display:block;width:100%;height:auto}
.contents{border:1px solid #305b4f;background:var(--green);color:#fbfcf4;padding:22px 31px 16px;border-radius:4px 25px 4px 4px;margin-bottom:45px}
.contents-title{display:flex;align-items:center;justify-content:space-between;padding-bottom:15px;font-size:10px;letter-spacing:1.8px;font-weight:600;color:#d6e2cf}
.contents-mark{font-size:30px;line-height:1;font-weight:400;letter-spacing:0}
.contents ol{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));column-gap:30px}
.contents li{border-top:1px solid #4d6d60}
.contents a{display:grid;grid-template-columns:24px 1fr 16px;align-items:center;gap:12px;padding:16px 0;text-decoration:none;font-size:14px;line-height:1.4}
.contents a:hover{color:#d7e9a7}
.toc-num{font-size:10px;letter-spacing:.4px;color:#c0d1ba}
.arrow{font-size:17px;color:#c0d1ba}
.article-shell{background:var(--white);border-block:1px solid var(--line)}
.article{padding-block:6px 8px}
.chapter{display:block;padding-block:55px;border-bottom:1px solid var(--line)}
.chapter:last-child{border-bottom:0}
.chapter-index{display:flex;align-items:center;width:64px;gap:12px;margin-bottom:18px}
.chapter-index span{font-size:13px;color:var(--accent);font-variant-numeric:tabular-nums}
.chapter-index i{height:1px;flex:1;background:var(--line)}
.chapter-body{display:flow-root}
.article-photo{float:right;width:360px;max-width:46%;margin:3px 0 20px 28px}
.article-photo a{display:block;border-radius:4px;overflow:hidden}
.article-photo img{display:block;width:100%;height:auto}
.article-photo a:focus-visible{outline-offset:4px}
.article-photo figcaption{margin-top:10px;font-size:12px;line-height:1.6;color:var(--muted)}
.product-photo{width:320px}
h2{font-size:30px;font-weight:550;letter-spacing:-.85px;line-height:1.3;margin:0 0 22px;color:var(--green);text-wrap:balance}
h3{font-size:23px;font-weight:550;letter-spacing:-.45px;line-height:1.4;margin:0 0 15px;color:var(--green)}
.chapter p{font-size:18px;line-height:1.85;letter-spacing:-.06px;margin:0 0 19px;color:#37433c;overflow-wrap:break-word}
.chapter p:last-child{margin-bottom:0}
.subsection{margin-top:36px}
.text-link{font-weight:700;color:var(--green);text-decoration-thickness:1px}
.text-link:hover{color:var(--accent)}
.guide-list{padding-left:24px;margin:0 0 20px;font-size:18px;line-height:1.85;color:#37433c}
.guide-list li{padding-left:4px;margin-bottom:12px;overflow-wrap:break-word}
.guide-list li::marker{color:var(--accent)}
.cleaning-steps{display:block}
.chapter-body>.subsection:nth-child(2){margin-top:0}
.brand-grid{list-style:none;padding:0;margin:28px 0 0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 28px}
.brand-grid li{border-top:1px solid var(--line)}
.brand-grid a{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:18px 0;text-decoration:none;font-size:18px;font-weight:550}
.brand-grid a>span:last-child{color:var(--accent);font-size:20px}
.brand-grid a:hover{color:var(--accent)}
summary{cursor:pointer;line-height:1.6}
summary:focus-visible{outline:3px solid var(--accent);outline-offset:4px;border-radius:3px}
.guide-table{width:100%;border-collapse:collapse;table-layout:fixed;margin:22px 0;font-size:16px;line-height:1.6}
.guide-table caption{text-align:left;font-size:14px;color:var(--muted);padding-bottom:12px}
.guide-table th,.guide-table td{padding:15px 18px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line);overflow-wrap:break-word}
.guide-table thead{background:var(--soft);color:var(--green)}
.guide-table th:first-child{width:34%}
.guide-table tbody th{font-weight:600}
.faq-list{display:grid;gap:12px;margin-top:24px}
.faq-list details{border:1px solid var(--line);border-radius:5px;background:#fafbf7}
.faq-list summary{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:20px 22px;font-size:18px;font-weight:600;color:var(--green);list-style:none}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:'+';flex:0 0 25px;display:grid;place-items:center;width:25px;height:25px;border:1px solid #b9c5b7;border-radius:50%;font-size:22px;font-weight:400;line-height:1}
.faq-list details[open]{background:var(--white);border-color:#96ac9d}
.faq-list details[open] summary::after{content:'−';background:var(--green);color:var(--white);border-color:var(--green)}
.faq-list summary:hover{background:var(--soft)}
.faq-list details>p:last-child{padding:0 22px 22px;margin:0}
.source-notes summary::marker{color:var(--accent)}
.source-notes{margin-top:30px;font-size:14px;color:var(--muted)}
.source-notes summary{padding:8px 0;font-size:14px}
.chapter .source-notes p{font-size:14px;line-height:1.7;margin:12px 0}
.source-notes ul{padding-left:20px;margin:16px 0 0;line-height:1.7}
.source-notes li{margin-bottom:9px;overflow-wrap:anywhere}
.related{padding-block:47px;display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:center}
.related .eyebrow{margin-bottom:11px;font-size:9px;color:var(--muted)}
.related h2{font-size:24px;margin:0}
.related-links{display:flex;flex-direction:column}
.related-links a{display:grid;grid-template-columns:42px minmax(0,1fr) 20px;align-items:center;gap:18px;padding:20px 0;border-bottom:1px solid var(--line);text-decoration:none}
.related-links a:last-child{border-bottom:0}
.related-icon{display:block;width:42px;height:auto;color:var(--green)}
.related-icon .icon-accent{stroke:var(--accent)}
.related-copy{min-width:0}
.related-copy strong{display:block;font-size:18px;font-weight:650;line-height:1.4;color:var(--green)}
.related-copy small{display:block;margin-top:6px;font-size:14px;line-height:1.6;color:var(--muted)}
.related-arrow{font-size:22px;color:var(--accent)}
.related-links a:hover .related-copy strong{color:var(--accent)}
.site-footer{border-top:1px solid var(--line)}
.footer-inner{display:flex;justify-content:space-between;align-items:center;gap:25px;padding-block:25px;font-size:11px;color:var(--muted)}
.footer-inner p{margin:0}
.footer-inner a{text-decoration:none;display:flex;align-items:center;gap:14px;padding:10px 0}
.footer-inner a span{font-size:18px}
@media(min-width:1500px){.wrap{width:min(1180px,calc(100% - 100px))}.hero{gap:100px}}
@media(max-width:1000px){.wrap{width:calc(100% - 64px)}.hero{gap:36px;grid-template-columns:1.05fr 1fr;padding-block:52px}.hero-description{font-size:18px}.desktop-break{display:none}.contents{padding:24px 22px 12px}.top-nav{gap:20px}.hero-footnote{margin-top:32px}.eyebrow{font-size:9px;letter-spacing:1.1px}.related{gap:40px}}
@media(max-width:720px){html{scroll-padding-top:90px}.wrap{width:calc(100% - 48px)}.header-inner{min-height:73px;gap:16px}.brand{font-size:17px;gap:9px}.brand svg{width:31px;height:35px}.brand-domain{font-size:10px;letter-spacing:.45px}.top-nav{gap:0;font-size:12px}.top-nav a{display:none}.top-nav a:first-child{display:block}.hero{grid-template-columns:1fr;gap:31px;padding-block:37px 40px}.eyebrow{margin-bottom:19px}.hero h1{font-size:42px;letter-spacing:-1.8px;margin-bottom:18px}.hero-description{font-size:18px;line-height:1.65;margin-bottom:19px;max-width:380px}.read-link{font-size:14px;gap:32px}.hero-footnote{margin-top:25px;font-size:8px}.contents{padding:21px 23px 11px;border-top-right-radius:32px}.contents-title{padding-bottom:11px;font-size:9px}.contents a{padding:13px 0;font-size:14px}.contents-mark{font-size:25px}.chapter{padding-block:37px}.chapter-index{width:61px;margin-bottom:15px}.chapter-index span{font-size:11px}h2{font-size:27px;letter-spacing:-.7px;margin-bottom:18px}h3{font-size:22px;margin-bottom:13px}.chapter p{font-size:18px;line-height:1.8;margin-bottom:18px}.subsection{margin-top:30px}.related{grid-template-columns:1fr;gap:16px;padding-block:33px}.related h2{font-size:24px}.related-links a{grid-template-columns:36px minmax(0,1fr) 18px;gap:14px;padding:19px 0}.related-icon{width:36px}.related-copy strong{font-size:17px}.related-copy small{font-size:13px}.related-arrow{font-size:20px}.footer-inner{font-size:10px;padding-block:18px}}
@media(max-width:360px){.brand{font-size:15px}.hero h1{font-size:36px}.top-nav{font-size:11px}.hero-description{font-size:17px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media(min-width:721px) and (max-width:1000px){.contents ol{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:720px){.contents ol{grid-template-columns:1fr}.article-photo{float:none;width:100%;max-width:400px;margin:3px 0 24px}.product-photo{max-width:320px}.guide-list{font-size:18px;line-height:1.8}.brand-grid{gap:0 22px}.brand-grid a{font-size:17px}.faq-list summary{font-size:18px}}
@media print{body{background:#fff;color:#000}.site-header,.hero,.related,.site-footer,.skip-link{display:none}.wrap{width:100%}.article-shell{border:0}.chapter{display:block;padding:18px 0;break-inside:auto}.chapter-index{display:none}.chapter p{font-size:11pt;line-height:1.55}h2{font-size:18pt;break-after:avoid}h3{font-size:14pt;break-after:avoid}.subsection{margin-top:20px}a{color:inherit}.text-link{text-decoration:underline}}

@media(max-width:720px){.guide-table{font-size:15px}.guide-table th,.guide-table td{padding:12px 10px}.guide-table th:first-child{width:39%}.faq-list summary{padding:18px 16px;gap:16px;font-size:17px}.faq-list details>p:last-child{padding:0 16px 18px;font-size:17px}}
@media(max-width:360px){.brand-grid{gap:0 14px}.brand-grid a{font-size:16px;gap:8px}.brand-grid a>span:first-child{min-width:0;overflow-wrap:anywhere}}