:root{color-scheme:light;--bg:#fafaf8;--ink:#202321;--muted:#636a63;--line:#e1e4dc;--paper:#fff;--red:#bc3c2e;font-family:Arial,Helvetica,sans-serif;font-size:14px;line-height:1.5;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,summary{touch-action:manipulation}button,summary{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #bc3c2e;outline-offset:4px}button:disabled{cursor:default}img{max-width:100%}.skip{position:absolute;left:16px;top:-100px;background:var(--ink);color:#fff;padding:12px;z-index:10}.skip:focus{top:12px}.shell{max-width:1120px;padding:0 32px;margin:auto}.header{border-bottom:1px solid var(--line)}.header-inner{min-height:76px;display:flex;align-items:center;gap:32px}.wordmark{display:flex;align-items:center;gap:10px;font-weight:600;white-space:nowrap}.mark{width:29px;height:29px;display:grid;place-items:center;background:var(--red);color:#fff;font-size:18px;border-radius:6px}.header nav{display:flex;gap:24px}.header-note{margin-left:auto;color:var(--muted);font-size:11px}.hero{padding:48px 0 36px}.eyebrow{font-size:11px;letter-spacing:1.5px;text-transform:uppercase;color:var(--muted);font-weight:600}.hero .eyebrow:before{content:'';display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--red);margin-right:8px;vertical-align:middle}h1{font-size:clamp(34px,5vw,60px);line-height:1.08;letter-spacing:-2.5px;margin:13px 0 18px;font-weight:600;max-width:900px}.dot{color:var(--red)}h2{font-size:25px;line-height:1.25;letter-spacing:-.7px;font-weight:500;margin:6px 0 18px}h3{font-size:17px;font-weight:500;line-height:1.35;margin:0 0 10px}p{margin:0 0 14px}.lead{color:var(--muted);font-size:16px;max-width:700px;line-height:1.6}.actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:25px 0 19px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:12px;border:1px solid var(--line);background:var(--paper);border-radius:10px;padding:12px 16px;font-size:13px;min-height:44px;color:var(--ink)}.btn-primary{background:var(--ink);border-color:var(--ink);color:#fff}.arrow{font-size:17px;line-height:1}.hero-notes{display:flex;gap:24px;flex-wrap:wrap;font-size:12px;color:var(--muted)}.hero-notes span:before{content:'✓';margin-right:7px;color:var(--ink)}.section{border-top:1px solid var(--line);padding:30px 0}.section-head{display:flex;gap:18px;align-items:flex-end;justify-content:space-between;margin-bottom:18px}.section-head h2{margin-bottom:0}.updated{font-size:12px;color:var(--muted)}.filters{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}.filter{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:6px;padding:8px 12px;background:var(--paper);font-size:12px;min-height:38px;color:var(--ink)}.filter[aria-pressed=true],.filter[aria-current=page]{background:var(--ink);color:#fff;border-color:var(--ink)}.search-row{display:flex;gap:8px;flex-wrap:wrap;align-items:stretch;margin-bottom:14px}.search{display:flex;align-items:center;gap:10px;flex:1;min-width:200px;background:var(--paper);border:1px solid var(--line);border-radius:6px;padding:10px 12px;min-height:44px}.search input{border:0;background:transparent;color:var(--ink);width:100%;min-width:0;font-size:14px}.search input:focus-visible{outline-offset:5px}.search-symbol{font-size:19px;color:var(--muted)}.sort,.currency{border:1px solid var(--line);border-radius:6px;background:var(--paper);padding:10px 12px;font-size:12px;color:var(--ink);min-height:44px}.results{font-size:12px;color:var(--muted);margin-bottom:10px}.table-head,.product-row{display:grid;grid-template-columns:minmax(0,1fr) 120px 115px 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11px}.price-note{font-size:12px;color:var(--muted);max-width:750px;margin-top:18px}.directory-link{display:inline-flex;align-items:center;gap:10px;font-weight:500;font-size:13px;margin-top:3px}.load-more{margin:20px 0 0;display:flex;gap:14px;align-items:center}.snapshot-note{font-size:12px;color:var(--muted)}[hidden]{display:none!important}.guide-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.guide-link{border-top:1px solid var(--line);padding:17px 0;display:block}.guide-link p{font-size:13px;color:var(--muted)}.guide-number{display:block;font-size:11px;color:var(--muted);margin-bottom:10px}.inline-link{color:var(--red);text-decoration:underline;text-underline-offset:3px}.faq-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:25px}details{border-top:1px solid var(--line);padding:15px 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var(--line)}.article-body h2{margin-bottom:12px}.article-body p{color:#50574f}.sources{padding:25px 0;border-top:1px solid var(--line)}.sources ul{padding-left:20px;font-size:13px}.sources a{text-decoration:underline;text-underline-offset:3px}.related{padding:26px 0;border-top:1px solid var(--line)}.category-advice{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.category-advice p{font-size:13px;color:var(--muted);border-top:1px solid var(--line);padding-top:16px}.utility-list{max-width:780px;color:var(--muted);font-size:15px;line-height:1.75}.empty{padding:35px 0;color:var(--muted)}.mobile-menu{display:none}
.selection-note{grid-column:1/-1;font-size:12px;line-height:1.55;color:var(--muted);margin-top:0;max-width:740px}.selection-note p{margin:0 0 5px}.selection-note p:last-child{margin-bottom:0}.selection-note strong{font-weight:500;color:var(--ink)}
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.preview-toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:16px 0}.preview-toolbar p{margin:0}.preview-toolbar .currency{flex-shrink:0}
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@media(max-width:600px){.shell{padding:0 16px}.header-inner{min-height:74px;gap:12px;flex-wrap:wrap;padding-top:15px;padding-bottom:15px}.wordmark{font-size:13px}.header nav{gap:14px;font-size:12px}.hero{padding:34px 0 28px}h1{letter-spacing:-1.6px}.lead{font-size:14px}.hero-notes{gap:12px;font-size:11px}.section-head{align-items:flex-start;flex-direction:column;gap:10px}.table-head{display:none}.product-row{grid-template-columns:minmax(0,1fr) 100px;gap:8px 12px;padding:15px 0}.product-main{grid-column:1;grid-row:1/3;align-items:flex-start;gap:10px}.product-title{font-size:12px}.product-brand{font-size:11px}.category-label{grid-column:1;grid-row:3;margin-left:62px}.price-cell{grid-column:2;grid-row:1;text-align:right}.product-link{grid-column:2;grid-row:2;min-height:44px;font-size:11px}.qc-note{font-size:11px}.search{min-width:100%}.search input{font-size:16px}.filter{min-height:44px}.guide-grid,.category-advice{grid-template-columns:1fr;gap:0}.faq-layout{display:block}.faq-layout h2{margin-bottom:20px}.article-body{font-size:15px}.article-hero h1{font-size:34px}.load-more{align-items:flex-start;flex-direction:column}.footer-inner{align-items:flex-start;flex-direction:column}.product-image,.image-unavailable{width:52px;height:52px;flex-basis:52px}.reading{margin:0}}
@media(max-width:900px){.category-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.editorial-layout{grid-template-columns:minmax(0,1fr);gap:20px}.editorial-aside{position:static;grid-row:1}.article-nav nav{grid-template-columns:repeat(2,minmax(0,1fr))}.article-nav .btn{width:auto}.article-nav p,.article-nav>.topic-link{display:none}.article-nav nav{margin-bottom:15px}}
@media(max-width:600px){.category-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.category-cover img{height:98px}.category-card-body{padding:12px}.category-card h3{font-size:14px}.category-card .directory-link{font-size:12px}.category-article-hero{padding:28px 0}.article-nav nav{grid-template-columns:1fr;gap:10px}.quick-checks dl,.topic-image-pair{grid-template-columns:1fr}.quick-checks dl{gap:16px}.article-image{height:245px;padding:16px}.topic-figure figcaption{padding:15px}.topic-image-pair .article-image{height:230px}.topic-link{min-height:30px}.article-nav{padding:16px}}
.measurement-diagram svg{max-width:560px;margin:auto}.image-unavailable.article-image{width:100%;flex-basis:auto;border-radius:0;font-size:13px}.category-cover>.image-unavailable{display:grid;width:100%;height:112px;border-radius:0;padding:10px;font-size:12px}
@media(max-width:600px){.comparison-table caption{display:block;width:100%}}
@media(max-width:600px){.selection-note{font-size:11px;margin-top:8px}.category-cover>.image-unavailable{height:98px}.comparison-table thead{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.comparison-table,.comparison-table tbody,.comparison-table tr,.comparison-table th,.comparison-table td{display:block;width:100%}.comparison-table tr{padding:13px 0;border-top:1px solid var(--line)}.comparison-table th,.comparison-table td{padding:0 0 8px;border:0}.comparison-table th:first-child{width:100%;font-weight:600}.comparison-table td:before{content:attr(data-label);display:block;font-size:10px;text-transform:uppercase;letter-spacing:.5px;color:var(--ink);margin-bottom:3px}.comparison-table td:last-child{padding-bottom:0}}