:root{--ink:#243340;--muted:#626f7a;--green:#226342;--mint:#ecf4ee;--lime:#fff;--cream:#f5f7f5;--line:#d5dcd7;--white:#fff;--link:#205ba2;--header:#243d50;--shadow:none}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#fff;font:15px/1.65 Arial,Helvetica,sans-serif}a{color:var(--link);text-decoration:none}a:hover{text-decoration:underline}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:wait;opacity:.65}button,input,select{border-radius:3px}input,select{border:1px solid #9ba99f;background:#fff;color:var(--ink)}button{border:1px solid #1c5337;background:var(--green);color:#fff;padding:8px 18px;font-weight:700}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #3576b3;outline-offset:3px}h1,h2,h3{line-height:1.3;color:#263e31}h1{font-size:32px;font-weight:700;margin:0 0 8px}h2{font-size:22px;font-weight:700;margin:0 0 15px}h3{font-size:17px;margin:0 0 10px}p{margin:0 0 16px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:absolute;top:-80px;background:white;padding:10px 20px;z-index:100}.skip-link:focus{top:5px}
.site-header{background:var(--header);color:white;border-bottom:1px solid #d0d9d3}.nav-shell,.toolbar-inner{max-width:1080px;margin:auto;padding:0 25px;display:flex;align-items:center;gap:25px}.nav-shell{min-height:83px}.brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:27px;font-weight:700;line-height:1.1}.brand:hover{text-decoration:none}.brand small{display:block;font-size:11px;letter-spacing:.3px;font-weight:400;color:#d0dce4;margin-top:5px}.brand-mark{font-size:30px;color:#fff;width:42px;height:42px;display:grid;place-items:center;background:#416b57;border:1px solid #829b8d;border-radius:3px}.primary-links{display:flex;gap:27px;margin-left:auto;font-size:14px}.primary-links a{color:#fff}.primary-links a[aria-current]{text-decoration:underline;text-underline-offset:6px}.toolbar{background:#eef2ee;color:var(--ink)}.toolbar-inner{min-height:48px;gap:18px;justify-content:space-between}.desktop-nav{display:flex;align-items:center;gap:17px;font-size:12px}.desktop-nav>a{color:#35513d;font-weight:700;max-width:160px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding:12px 0}.desktop-nav>a.active{text-decoration:underline;text-underline-offset:5px}.context-category-link{border-right:1px solid #bdcbbf;padding-right:15px!important}.nav-more{position:relative}.nav-more summary{cursor:pointer;list-style:none;font-weight:700;white-space:nowrap;padding:12px 0}.nav-more summary::-webkit-details-marker{display:none}.more-menu{position:absolute;z-index:40;top:100%;left:0;width:510px;max-height:440px;overflow:auto;background:#fff;box-shadow:0 3px 12px #0002;border:1px solid var(--line);padding:20px;display:grid;grid-template-columns:1fr 1fr;gap:20px}.more-menu h2{font-size:13px;margin:0 0 7px;color:var(--green)}.more-menu a{font-size:12px;display:block;padding:3px 0}.more-menu .browse-all{grid-column:1/-1;border-top:1px solid var(--line);padding-top:12px;font-weight:700}.nav-toggle{display:none;background:transparent;border-color:#a7bdb0;padding:6px 10px;font-size:12px}.global-search{display:flex;position:relative;margin:0;width:260px;flex:0 0 260px}.global-search input{width:100%;min-width:0;padding:5px 9px;border-color:#b7c3b9;border-radius:3px 0 0 3px;font-size:12px}.global-search button{padding:5px 11px;border-radius:0 3px 3px 0;font-size:12px}.suggestions{position:absolute;top:100%;right:0;background:#fff;border:1px solid var(--line);width:350px;max-width:calc(100vw - 32px);max-height:360px;overflow:auto;z-index:45;box-shadow:0 3px 10px #0002}.suggestions a{display:block;padding:9px 13px;border-bottom:1px solid #eee;font-size:13px}.suggestions small{display:block;color:var(--muted);font-size:11px}.suggestions a.selected,.suggestions a:hover{background:var(--mint);text-decoration:none}
main{max-width:1080px;margin:auto;padding:29px 25px 45px;min-height:60vh}.home-layout{display:grid;grid-template-columns:minmax(0,750px) 225px;gap:35px}.page-intro{margin-bottom:22px}.page-intro>p{color:var(--muted);font-size:15px}.express-converter{border:1px solid #bacbbd;background:#f0f5ef;padding:19px 20px 15px;border-radius:4px}.express-converter>h2{font-size:18px;margin-bottom:14px}.measurement-tabs{display:flex;gap:2px;border-bottom:3px solid var(--green);margin:0 0 19px}.measurement-tabs button{flex:1;border:1px solid #cad6cc;border-bottom:0;background:#e0e9de;color:#344f3c;font-size:13px;padding:8px 9px;border-radius:3px 3px 0 0;white-space:nowrap}.measurement-tabs button[aria-selected=true]{background:var(--green);color:#fff;border-color:var(--green)}.unit-columns{display:grid;grid-template-columns:minmax(0,1fr) 32px minmax(0,1fr);gap:12px;align-items:center}.unit-column{min-width:0}.unit-column>label{display:block;font-weight:700;margin-bottom:6px;font-size:15px}.unit-column>input{width:100%;height:45px;padding:7px 10px;font-size:22px;font-variant-numeric:tabular-nums;border-color:#8f9f92;margin-bottom:10px}.unit-column>input[readonly]{background:#fff;color:#1d5a38;font-weight:700}.unit-column .unit-select-label{font-size:11px;color:var(--muted);font-weight:400;margin:0 0 4px}.unit-column>select{display:block;width:100%;height:166px;max-width:100%;border-color:#a4b3a7;font-size:14px;scrollbar-width:thin}.unit-column option{padding:3px 9px;min-height:25px}.swap-units{padding:0;width:32px;height:32px;background:white;color:var(--green);border-color:#acbfae;font-size:20px;line-height:1}.express-result{font-size:17px;font-weight:700;color:#205637;background:#fff;border:1px solid #ccd9cc;padding:10px 12px;margin:16px 0 9px;overflow-wrap:anywhere}.converter-help{font-size:12px;color:#596a5b;margin:0 0 7px}.unit-convention{font-size:11px;color:#667568;margin:0}.home-section{margin-top:28px}.home-section>h2{padding-bottom:7px;border-bottom:1px solid var(--line);font-size:21px}.unit-finder{background:#f5f6f5;padding:14px 17px;border:1px solid #e0e4e0}.unit-finder>label{display:block;font-size:13px;margin-bottom:7px}.unit-finder>div{display:flex;gap:9px}.unit-finder input{flex:1;min-width:0;padding:7px 10px}.unit-finder button{font-size:13px;padding:7px 15px}.conversion-links{padding:0;margin:0;list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:2px 30px;font-size:14px}.conversion-links li{padding:4px 0}.section-note{font-size:13px;color:var(--muted);margin-top:-6px}.topic-directory{display:grid;grid-template-columns:1fr 1fr;gap:25px 35px}.topic-group h3{font-size:16px;padding-bottom:6px;border-bottom:1px solid #e5e8e5}.topic-group ul{margin:0;list-style:none;padding:0}.topic-group li{display:flex;align-items:start;gap:10px;justify-content:space-between;font-size:13px;padding:5px 0}.topic-group li span{color:#768378;font-size:11px}.home-sidebar{padding-top:5px}.home-sidebar>h2,.sidebar-help h2{font-size:17px;background:#e9eee9;border-top:3px solid #42744f;padding:9px 12px;margin-bottom:0}.home-sidebar>ul{list-style:none;padding:5px 12px 12px;margin:0;border:1px solid #dce3dd;border-top:0}.home-sidebar li a{display:block;font-size:13px;padding:7px 0;border-bottom:1px solid #edf0ed}.sidebar-all{display:block;padding:10px 12px;font-size:13px;font-weight:700;border:1px solid #dce3dd;border-top:0}.sidebar-help{margin-top:25px}.sidebar-help p{font-size:13px;padding:12px 12px 0;margin-bottom:9px;color:var(--muted)}.sidebar-help>a{display:block;padding:0 12px;font-size:12px}
.page-hero,.tool-hero{padding:0;background:none;margin:0 0 24px}.page-hero h1,.tool-copy h1{font-family:inherit;font-size:30px;font-weight:700;letter-spacing:normal;margin:0 0 9px}.page-hero>p,.tool-copy>p{font-size:14px;color:var(--muted);max-width:780px}.breadcrumbs{font-size:12px;display:flex;flex-wrap:wrap;gap:8px;color:var(--muted);margin-bottom:15px}.eyebrow{display:block;font-size:11px;text-transform:uppercase;letter-spacing:.7px;color:var(--muted);margin-bottom:5px}.tool-layout{display:block}.feature-pills{display:none}.converter{background:#f0f5ef;border:1px solid #bacbbd;max-width:750px;border-radius:4px;padding:20px;box-shadow:none;margin-top:20px}.converter-top{display:flex;justify-content:space-between;font-size:11px;color:var(--green);margin-bottom:15px}.converter label{font-size:14px;font-weight:700;display:block}.value-field{display:flex;align-items:center;background:white;border:1px solid #a7b6a9;margin-top:6px;border-radius:3px;min-height:50px}.value-field input{width:100%;border:0;padding:9px 12px;font-size:23px;min-width:0;background:transparent}.value-field span{padding:0 12px;color:var(--muted);font-size:13px;white-space:nowrap}.tool-unit-columns{display:grid;grid-template-columns:1fr 1fr;gap:18px}.result-box{background:white;color:#225b3b;border:1px solid #a7b6a9;margin-top:6px;padding:9px 12px;min-height:50px;border-radius:3px;display:flex;align-items:center;justify-content:space-between;gap:10px;overflow-wrap:anywhere}.result-box strong{font-size:23px;color:#225b3b;font-variant-numeric:tabular-nums}.result-box span{font-size:13px;color:var(--muted);white-space:nowrap}.calculator-actions{display:flex;align-items:center;gap:20px;margin-top:15px}.convert-button{width:auto;display:inline-flex;gap:18px;justify-content:space-between;font-size:14px;padding:8px 22px}.reverse-link{font-size:13px}.calculation-note{font-size:13px;margin:13px 0 0;color:#3f694c;min-height:22px}.section{padding:0;margin:25px 0;max-width:none}.section.soft{background:none;padding:0}.section-head{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:16px;border-bottom:1px solid var(--line);padding-bottom:8px}.section-head h2{font-family:inherit;font-size:22px;letter-spacing:normal;margin:0}.section-head a{font-size:13px}.tool-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 25px}.tool-card{display:flex;align-items:center;gap:10px;border:0;border-bottom:1px solid #e6eae6;border-radius:0;padding:12px 0;background:white;transition:none}.tool-card:hover{transform:none;box-shadow:none;background:#f8faf8}.tool-card h3{font-size:15px;color:var(--link);margin:0 0 3px}.tool-card p{font-size:12px;margin:0;color:var(--muted)}.tool-card small{font-size:11px;color:#637568}.tool-card b{margin-left:auto;font-size:13px;font-weight:400}.tool-icon{width:28px;height:28px;flex:0 0 28px;display:grid;place-items:center;background:#eef3ef;color:#40604b;border-radius:3px;font-size:16px}.tool-icon img{max-width:26px;max-height:26px}.category-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px 20px}.category-card{display:flex;gap:8px;padding:12px 0;border-bottom:1px solid var(--line);align-items:center;font-size:13px}.category-card h3{font-size:14px;color:var(--link);margin:0}.category-card p{font-size:11px;margin:0;color:var(--muted)}.category-card b{margin-left:auto}.category-description{font-size:14px;line-height:1.8;max-width:780px}.category-description h2{font-size:20px;margin:24px 0 10px}.category-guide{margin-top:35px;border-top:1px solid var(--line);padding-top:24px}.filter-field{display:block;font-size:13px;margin-bottom:18px}.filter-field input{display:block;padding:8px 11px;width:100%;max-width:410px;margin-top:5px}.directory-group{margin:0 0 30px}.directory-group>h2{font-size:21px;border-bottom:1px solid var(--line);padding-bottom:8px}.directory-categories{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.directory-categories>div{display:flex;flex-direction:column;border:1px solid #e1e6e1;padding:15px;border-radius:3px}.directory-categories h3{font-size:15px;margin-bottom:10px}.directory-categories a:not(h3 a){font-size:13px;padding:3px 0}.directory-categories .more{font-weight:700;margin-top:5px}.article-layout{display:grid;grid-template-columns:minmax(0,750px) 225px;gap:35px;margin-top:30px}.article-layout article{font-size:15px;line-height:1.85;color:#34433b;min-width:0}.article-layout article section{margin:0 0 30px}.article-layout h2{font-family:inherit;font-size:22px;font-weight:700;letter-spacing:normal;margin:0 0 12px}.guide-section{scroll-margin-top:20px}.guide-section p{line-height:1.85}.guide-contents{border:1px solid var(--line);background:#f7f9f7;padding:12px 16px;margin-bottom:22px;border-radius:3px}.guide-contents>summary{cursor:pointer;font-size:14px;font-weight:700;color:#345f42}.guide-contents ol{columns:2;padding-left:20px;column-gap:22px;font-size:12px;margin-bottom:5px}.guide-contents li{break-inside:avoid;padding:3px 0}.formula,.example-box{font-family:Consolas,monospace;background:#f0f5ef;border:1px solid #d4dfd4;border-left:3px solid #42724f;padding:13px 16px;margin:16px 0 23px;border-radius:0;font-size:15px;color:#26462f;overflow-wrap:anywhere}.example-box{font-family:inherit}.table-scroll{overflow:auto}.conversion-table{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums;font-size:14px}.conversion-table caption{font-size:12px;color:var(--muted);text-align:left;margin-bottom:9px}.conversion-table th,.conversion-table td{text-align:left;border:1px solid #d4ddd4;padding:7px 13px}.conversion-table thead{background:#e5eee3}.conversion-table tbody tr:nth-child(even){background:#f7f9f6}.faq-list details{border-bottom:1px solid var(--line);padding:12px 0}.faq-list summary{cursor:pointer;display:flex;justify-content:space-between;gap:15px;list-style:none;font-size:14px;font-weight:700;color:#345442}.faq-list summary::-webkit-details-marker{display:none}.faq-list p{font-size:14px;line-height:1.8;margin:10px 0 4px}.disclaimer{background:#fffbed;border:1px solid #e8dfbd;border-radius:3px;padding:12px 15px;font-size:13px;line-height:1.8}.guide-updated{font-size:11px;color:var(--muted);margin-top:15px}.source-link{text-decoration:underline}.aside-card{position:sticky;top:20px;border:1px solid var(--line);border-radius:3px;padding:15px}.aside-card h3{font-size:17px}.aside-card a{display:flex;justify-content:space-between;gap:9px;border-top:1px solid #e4e9e4;padding:9px 0;font-size:13px}.aside-card .all-link{font-weight:700}.prose{max-width:780px;line-height:1.85}.empty{grid-column:1/-1;padding:30px 0}.button{display:inline-block;padding:8px 15px;background:var(--green);color:white;font-size:13px;border-radius:3px}.hero-search{display:flex;max-width:600px;margin-top:15px;gap:8px}.hero-search input{flex:1;min-width:0;padding:9px 12px}.hero-search>span{display:none}.hero-search button{font-size:13px}.filter-empty{color:var(--muted);font-size:14px;margin-top:15px}.filter-empty a{text-decoration:underline}[hidden]{display:none!important}
footer{max-width:1080px;margin:auto;padding:20px 25px 24px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}footer nav{display:flex;flex-wrap:wrap;gap:7px 20px;margin-bottom:10px}footer p{font-size:11px;margin:0}
@media(max-width:1000px){.desktop-nav{gap:12px}.desktop-nav>a{max-width:125px;font-size:11px}.global-search{width:225px;flex-basis:225px}.home-layout,.article-layout{grid-template-columns:minmax(0,1fr) 200px;gap:25px}.measurement-tabs button{padding:8px 5px;font-size:12px}}
@media(max-width:800px){.home-layout,.article-layout{grid-template-columns:1fr}.home-sidebar{display:none}.article-layout aside{max-width:none}.aside-card{position:static}.desktop-nav .tool-nav-link{display:none}.desktop-nav>a{max-width:none}.desktop-nav{gap:15px}.nav-shell,.toolbar-inner,main{padding-left:18px;padding-right:18px}.directory-categories{grid-template-columns:1fr 1fr}.global-search{width:250px;flex-basis:250px}.measurement-tabs button{font-size:13px}.more-menu{left:0;max-width:calc(100vw - 36px)}}
@media(max-width:580px){body{font-size:14px}.nav-shell{min-height:74px;gap:12px}.brand{font-size:23px}.brand-mark{width:35px;height:35px;font-size:25px}.primary-links{gap:14px;font-size:12px}.primary-links a:last-child{display:none}.nav-toggle{display:block;margin-left:auto;font-size:11px}.primary-links{margin-left:auto}.toolbar-inner{flex-wrap:wrap;gap:0;padding-top:9px;padding-bottom:9px}.desktop-nav{display:none;width:100%;flex-wrap:wrap;gap:0 18px;padding-bottom:8px}.desktop-nav.open{display:flex}.global-search{width:100%;flex-basis:100%}.global-search input,.global-search button{font-size:13px;padding:7px 10px}.desktop-nav .tool-nav-link{display:block;max-width:160px}.more-menu{width:calc(100vw - 36px);left:0;grid-template-columns:1fr;max-height:350px}.nav-more{position:static}.toolbar-inner{position:relative}.more-menu{top:47px}.measurement-tabs{flex-wrap:wrap;gap:3px;border:0}.measurement-tabs button{flex:0 0 calc((100% - 6px)/3);border-bottom:1px solid #cad6cc;border-radius:3px;padding:8px 4px}.express-converter{padding:14px 12px}.unit-columns{gap:7px;grid-template-columns:minmax(0,1fr) 27px minmax(0,1fr)}.swap-units{width:27px;height:30px;font-size:18px}.unit-column>input{font-size:18px;padding:7px 8px}.unit-column>select{font-size:12px;height:151px}.unit-column option{padding:4px 5px}.express-result{font-size:14px}.unit-finder{padding:12px}.unit-finder>div{flex-wrap:wrap}.unit-finder input{flex-basis:100%}.conversion-links{column-gap:14px;font-size:13px}.topic-directory{grid-template-columns:1fr;gap:24px}.tool-grid,.directory-categories,.category-grid{grid-template-columns:1fr}.page-hero h1,.tool-copy h1{font-size:26px}.guide-contents ol{columns:1}.tool-unit-columns{gap:12px}.result-box strong,.value-field input{font-size:19px}.result-box,.value-field{min-height:47px}.result-box span,.value-field span{font-size:11px;padding-right:5px}.value-field input{padding-left:8px}.converter{padding:15px 12px}.calculator-actions{gap:12px;flex-wrap:wrap}.article-layout h2{font-size:21px}.section-head{align-items:start}.section-head a{font-size:12px}.home-section{margin-top:25px}main{padding-top:22px}.home-section>h2{font-size:20px}.conversion-table th,.conversion-table td{padding:7px 10px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media(max-width:580px){.primary-links a:first-child{display:none}}@media(max-width:380px){.primary-links{display:none}}
.unit-column option:checked{background:#d5e5d2;color:#1d4c2c;font-weight:700}
/* Forms for calculators with several inputs and text transformations. */
.recipe-calculator{padding:18px;border:1px solid #bcc5cd;background:#f4f7f8;margin:12px 0}.recipe-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.recipe-field label{display:block;font-weight:bold;margin-bottom:6px}.recipe-field label span{font-weight:normal}.recipe-field input,.recipe-field select,.recipe-field textarea{width:100%;max-width:100%;box-sizing:border-box;padding:9px;border:1px solid #9aa8b5;background:white;font:inherit}.recipe-wide{grid-column:1/-1}.recipe-calculator .convert-button{margin-top:16px}.recipe-result{white-space:pre-wrap;overflow-wrap:anywhere;word-break:break-word;max-height:400px;overflow:auto;background:white;border:1px solid #b9c8b5;padding:12px;font:16px/1.5 monospace}.recipe-notes{font-size:13px;line-height:1.5}.example-value{white-space:pre-wrap;overflow-wrap:anywhere;max-width:500px}.recipe-status{font-size:14px}@media(max-width:600px){.recipe-fields{grid-template-columns:1fr}.recipe-calculator{padding:12px}.example-value{max-width:200px}}