:root{--navy:#192f44;--orange:#ab452b;--cream:#faf8f2}*{box-sizing:border-box}body{margin:0;background:var(--cream);color:var(--navy);font:17px/1.8 'Segoe UI',Arial,sans-serif}a{color:inherit;text-underline-offset:5px}button,input,select{font:inherit}.preview-bar{background:#162d40;color:#e9eff2;padding:8px 5%;font-size:11px;letter-spacing:1px;display:flex;justify-content:space-between}.site-header{max-width:1280px;margin:auto;padding:32px 50px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #dcded9;gap:30px}.site-brand{font:36px/1 Georgia,serif;text-decoration:none;letter-spacing:-1.3px}.site-brand span{display:block;font:10px/1.8 Arial,sans-serif;letter-spacing:5px;margin:9px 0 0 3px}.site-header nav{display:flex;gap:27px;font-size:13px}.site-header nav a{text-decoration:none}.site-header nav a:hover{text-decoration:underline}.site-hero{max-width:1280px;margin:0 auto;padding:65px 50px 75px;display:grid;grid-template-columns:1.3fr 1fr;gap:80px;align-items:center}.site-hero img{width:100%;max-height:570px;object-fit:contain;box-shadow:0 12px 30px #20394a14}.kicker{color:var(--orange);font-size:11px;letter-spacing:2px;font-weight:700;text-transform:uppercase}.site-hero h1{font:56px/1.13 Georgia,serif;letter-spacing:-1.5px;margin:24px 0}.site-hero p{color:#506272;max-width:550px}.site-button{background:var(--navy);color:#fff;border:1px solid var(--navy);padding:13px 20px;font-size:14px;display:inline-block;border-radius:4px;text-decoration:none;cursor:pointer;line-height:1.7;margin:15px 0}.site-button:hover{background:#2d4d66}.site-button.secondary{background:transparent;color:var(--navy);white-space:nowrap}.site-section{max-width:1280px;padding:55px 50px;margin:auto;border-top:1px solid #d8dedc}.site-section h2{font:36px/1.3 Georgia,serif}.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin:35px 0}.article-card{padding:27px;background:#fff;border:1px solid #e0e3dd;text-decoration:none;border-top:3px solid #244b65}.article-card:hover{border-top-color:var(--orange)}.article-card>span{font-size:10px;letter-spacing:1.5px;color:var(--orange);text-transform:uppercase}.article-card h3{font:25px/1.3 Georgia,serif}.article-card p{font-size:14px;color:#60717c}.article-card strong{font-size:13px}.reading{max-width:850px;margin:0 auto;padding:60px 40px}.reading h1{font:47px/1.15 Georgia,serif;letter-spacing:-1px;margin:18px 0 26px}.standfirst{font-size:20px;line-height:1.7;color:#516370}.byline{font-size:12px;color:#6f7b84;margin:22px 0}.ad-disclosure{font-size:13px;line-height:1.7;background:#eeeae0;padding:18px 23px;border-left:3px solid var(--orange);margin:28px 0}.reading h2{font:29px/1.3 Georgia,serif;margin:35px 0 15px}.reading-section p{color:#344d5c}.reading-section{margin-bottom:25px}.worksheet-text{white-space:pre-wrap;line-height:2.4}.reader-next{background:#1b384d;color:#fff;margin:55px 0 20px;padding:25px 32px}.reader-next h2{margin-top:10px}.reader-next p{font-size:15px;color:#d1dde4}.reader-next div{display:flex;gap:25px;font-size:13px;flex-wrap:wrap}.product-examples{border-top:1px solid #cdd7da;margin-top:45px}.product-examples>p{font-size:14px;color:#60717b}.product-examples article{border:1px solid #d3dcde;padding:25px;background:#fff;margin:20px 0}.product-examples h3{font-size:20px;line-height:1.4;margin:12px 0}.product-examples article p{margin:8px 0;font-size:15px}.product-examples small{display:block;font-size:12px}.sources p{font-size:13px}.sources span{color:#6e7b84;display:block;font-size:11px}.calculator{background:#fff;border:1px solid #c9d5db;padding:28px;margin:30px 0}.calculator h2{margin-top:0}.calculator label{font-size:13px;display:block}.calculator input:not([type=checkbox]),.calculator select{display:block;max-width:100%;width:100%;padding:10px 12px;border:1px solid #aebfca;background:#fff;color:#213d51;border-radius:3px;margin:6px 0 12px}.calculator fieldset{border:0;border-top:1px solid #dde3e6;padding:18px 0 5px;margin-top:18px}.calculator legend{font-size:14px;font-weight:600}.dimension-row{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.unit-label{max-width:180px}.site-check{display:flex!important;align-items:center;gap:10px;margin-top:15px}.site-check input{accent-color:var(--navy)}.calculator output{display:block;padding:15px;margin-top:10px;font-size:16px;border-radius:3px}.calculator output:empty{display:none}.fit-pass{background:#e8f3eb;border:1px solid #74a886}.fit-fail{background:#fff0e9;border:1px solid #ce8059}.small{font-size:12px;color:#657784}.reading>button{border:0}footer{max-width:1180px;margin:30px auto 0;padding:45px 0 50px;border-top:1px solid #d5ddd9;font-size:13px;color:#657681}footer p{max-width:570px}footer .site-brand{color:var(--navy);display:inline-block;font-size:28px}a:focus-visible,button:focus-visible,input:focus,select:focus{outline:3px solid #d99060;outline-offset:3px}
@media(max-width:850px){.site-header{padding:25px;flex-wrap:wrap}.site-header nav{gap:18px;flex-wrap:wrap}.site-hero{padding:40px 25px;gap:30px;grid-template-columns:1fr 1fr}.site-hero h1{font-size:39px}.site-section{padding:35px 25px}.article-grid{grid-template-columns:1fr 1fr}.reading{padding:40px 25px}.reading h1{font-size:37px}footer{padding:35px 25px}.site-hero p{font-size:15px}}
@media(max-width:560px){.site-hero{grid-template-columns:1fr}.site-hero img{max-height:450px}.article-grid{grid-template-columns:1fr}.dimension-row{gap:8px}.calculator{padding:18px}.reading h1{font-size:33px}.reading .standfirst{font-size:18px}.reader-next{padding:20px}.site-header nav{font-size:12px}}
@media print{.preview-bar,.site-header,footer,.reader-next,button,.byline{display:none}.reading{padding:0;max-width:none}body{font-size:12pt;background:#fff;color:#000}.reading h1{font-size:25pt}.reading h2{font-size:16pt;margin:15px 0 8px}.reading-section{break-inside:avoid;margin-bottom:12px}.worksheet-text{line-height:1.9}.standfirst{font-size:12pt}.kicker{font-size:9pt}}

.skip-link{position:absolute;left:16px;top:-100px;background:#fff;color:var(--navy);padding:10px 16px;z-index:10}.skip-link:focus{top:12px}
.site-hero img{height:auto}.breadcrumbs{font-size:13px;line-height:1.6;margin:0 0 25px;color:#506272}.article-contents{display:grid;gap:8px}.reading-section{scroll-margin-top:24px}.related-guides{border-top:1px solid #d5ddd9;margin-top:40px}.related-guides li{margin:10px 0}.related-guides ul{padding-left:22px}@media print{.breadcrumbs,.article-contents,.related-guides{display:none}}
.site-hero figure{margin:0}.site-hero figcaption{font-size:12px;line-height:1.5;color:#506272;margin-top:14px}
.site-header nav,footer nav,.page-links{font-size:14px}footer nav,.page-links{display:flex;gap:12px 24px;flex-wrap:wrap}
.page-links{border-block:1px solid #d5ddd9;padding:16px 0;margin:28px 0}.legal-page section{scroll-margin-top:24px}.legal-page h3{font-size:20px;line-height:1.4;margin-top:28px}.business-address{white-space:pre-line}
.ad-disclosure,.calculator label,.reader-next div,.sources p{font-size:14px}.calculator label,.dimension-row>*{min-width:0}.calculator input:not([type=checkbox]){min-width:0}.calculator-page{padding-top:30px}.calculator-page h1{font-size:40px}.calculator-page .standfirst{font-size:17px;margin-bottom:15px}.calculator-page .calculator{margin-top:20px}.calculator-page #clearance-help{margin-top:0;line-height:1.5;font-size:13px}
.worksheet-text{overflow-wrap:anywhere}.worksheet-page .reading-section{margin-bottom:18px}.worksheet-page .worksheet-text{line-height:2}.worksheet-page .kicker{display:none}
@media(max-width:560px){.site-header nav{font-size:14px}.calculator-page h1{font-size:32px}.dimension-row{grid-template-columns:repeat(3,minmax(0,1fr))}.calculator input:not([type=checkbox]){padding:9px 6px}.worksheet-text{font-size:14px}}
@media print{.skip-link,.page-links,.site-button{display:none}.worksheet-page{padding:0}.worksheet-page h1{font-size:22pt;margin:0 0 10px}.worksheet-page h2{font-size:13pt;margin:14px 0 6px}.worksheet-page .worksheet-text{font-size:10pt;line-height:1.65}.worksheet-page .reading-section{margin-bottom:8px}.worksheet-page .standfirst{font-size:10pt;margin:0 0 12px}}